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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/leds
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/Kconfig882
-rw-r--r--drivers/leds/Makefile112
-rw-r--r--drivers/leds/TODO75
-rw-r--r--drivers/leds/blink/Kconfig31
-rw-r--r--drivers/leds/blink/Makefile3
-rw-r--r--drivers/leds/blink/leds-bcm63138.c307
-rw-r--r--drivers/leds/blink/leds-lgm-sso.c877
-rw-r--r--drivers/leds/flash/Kconfig93
-rw-r--r--drivers/leds/flash/Makefile11
-rw-r--r--drivers/leds/flash/leds-aat1290.c556
-rw-r--r--drivers/leds/flash/leds-as3645a.c772
-rw-r--r--drivers/leds/flash/leds-ktd2692.c419
-rw-r--r--drivers/leds/flash/leds-lm3601x.c482
-rw-r--r--drivers/leds/flash/leds-max77693.c1059
-rw-r--r--drivers/leds/flash/leds-mt6360.c910
-rw-r--r--drivers/leds/flash/leds-rt4505.c429
-rw-r--r--drivers/leds/flash/leds-rt8515.c399
-rw-r--r--drivers/leds/flash/leds-sgm3140.c312
-rw-r--r--drivers/leds/led-class-flash.c446
-rw-r--r--drivers/leds/led-class-multicolor.c205
-rw-r--r--drivers/leds/led-class.c552
-rw-r--r--drivers/leds/led-core.c490
-rw-r--r--drivers/leds/led-triggers.c464
-rw-r--r--drivers/leds/leds-88pm860x.c240
-rw-r--r--drivers/leds/leds-acer-a500.c129
-rw-r--r--drivers/leds/leds-adp5520.c197
-rw-r--r--drivers/leds/leds-an30259a.c371
-rw-r--r--drivers/leds/leds-apu.c222
-rw-r--r--drivers/leds/leds-ariel.c133
-rw-r--r--drivers/leds/leds-asic3.c177
-rw-r--r--drivers/leds/leds-aw2013.c433
-rw-r--r--drivers/leds/leds-bcm6328.c487
-rw-r--r--drivers/leds/leds-bcm6358.c229
-rw-r--r--drivers/leds/leds-bd2802.c799
-rw-r--r--drivers/leds/leds-blinkm.c746
-rw-r--r--drivers/leds/leds-clevo-mail.c217
-rw-r--r--drivers/leds/leds-cobalt-qube.c67
-rw-r--r--drivers/leds/leds-cobalt-raq.c105
-rw-r--r--drivers/leds/leds-cpcap.c226
-rw-r--r--drivers/leds/leds-cr0014114.c298
-rw-r--r--drivers/leds/leds-da903x.c147
-rw-r--r--drivers/leds/leds-da9052.c191
-rw-r--r--drivers/leds/leds-dac124s085.c110
-rw-r--r--drivers/leds/leds-el15203000.c346
-rw-r--r--drivers/leds/leds-gpio-register.c43
-rw-r--r--drivers/leds/leds-gpio.c313
-rw-r--r--drivers/leds/leds-hp6xx.c78
-rw-r--r--drivers/leds/leds-ip30.c87
-rw-r--r--drivers/leds/leds-ipaq-micro.c132
-rw-r--r--drivers/leds/leds-is31fl319x.c614
-rw-r--r--drivers/leds/leds-is31fl32xx.c501
-rw-r--r--drivers/leds/leds-lm3530.c500
-rw-r--r--drivers/leds/leds-lm3532.c742
-rw-r--r--drivers/leds/leds-lm3533.c757
-rw-r--r--drivers/leds/leds-lm355x.c529
-rw-r--r--drivers/leds/leds-lm36274.c172
-rw-r--r--drivers/leds/leds-lm3642.c415
-rw-r--r--drivers/leds/leds-lm3692x.c529
-rw-r--r--drivers/leds/leds-lm3697.c388
-rw-r--r--drivers/leds/leds-locomo.c82
-rw-r--r--drivers/leds/leds-lp3944.c440
-rw-r--r--drivers/leds/leds-lp3952.c286
-rw-r--r--drivers/leds/leds-lp50xx.c619
-rw-r--r--drivers/leds/leds-lp5521.c621
-rw-r--r--drivers/leds/leds-lp5523.c993
-rw-r--r--drivers/leds/leds-lp5562.c616
-rw-r--r--drivers/leds/leds-lp55xx-common.c712
-rw-r--r--drivers/leds/leds-lp55xx-common.h211
-rw-r--r--drivers/leds/leds-lp8501.c404
-rw-r--r--drivers/leds/leds-lp8788.c171
-rw-r--r--drivers/leds/leds-lp8860.c491
-rw-r--r--drivers/leds/leds-lt3593.c128
-rw-r--r--drivers/leds/leds-max77650.c148
-rw-r--r--drivers/leds/leds-max8997.c299
-rw-r--r--drivers/leds/leds-mc13783.c315
-rw-r--r--drivers/leds/leds-menf21bmc.c110
-rw-r--r--drivers/leds/leds-mlxcpld.c435
-rw-r--r--drivers/leds/leds-mlxreg.c301
-rw-r--r--drivers/leds/leds-mt6323.c491
-rw-r--r--drivers/leds/leds-net48xx.c86
-rw-r--r--drivers/leds/leds-netxbig.c642
-rw-r--r--drivers/leds/leds-nic78bx.c200
-rw-r--r--drivers/leds/leds-ns2.c284
-rw-r--r--drivers/leds/leds-ot200.c152
-rw-r--r--drivers/leds/leds-pca9532.c560
-rw-r--r--drivers/leds/leds-pca955x.c699
-rw-r--r--drivers/leds/leds-pca963x.c442
-rw-r--r--drivers/leds/leds-pm8058.c182
-rw-r--r--drivers/leds/leds-powernv.c349
-rw-r--r--drivers/leds/leds-pwm.c217
-rw-r--r--drivers/leds/leds-rb532.c64
-rw-r--r--drivers/leds/leds-regulator.c205
-rw-r--r--drivers/leds/leds-s3c24xx.c83
-rw-r--r--drivers/leds/leds-sc27xx-bltc.c361
-rw-r--r--drivers/leds/leds-spi-byte.c154
-rw-r--r--drivers/leds/leds-ss4200.c557
-rw-r--r--drivers/leds/leds-sunfire.c254
-rw-r--r--drivers/leds/leds-syscon.c140
-rw-r--r--drivers/leds/leds-tca6507.c822
-rw-r--r--drivers/leds/leds-ti-lmu-common.c153
-rw-r--r--drivers/leds/leds-tlc591xx.c242
-rw-r--r--drivers/leds/leds-tps6105x.c89
-rw-r--r--drivers/leds/leds-turris-omnia.c310
-rw-r--r--drivers/leds/leds-wm831x-status.c305
-rw-r--r--drivers/leds/leds-wm8350.c268
-rw-r--r--drivers/leds/leds-wrap.c130
-rw-r--r--drivers/leds/leds.h37
-rw-r--r--drivers/leds/rgb/Kconfig29
-rw-r--r--drivers/leds/rgb/Makefile4
-rw-r--r--drivers/leds/rgb/leds-pwm-multicolor.c190
-rw-r--r--drivers/leds/rgb/leds-qcom-lpg.c1461
-rw-r--r--drivers/leds/simple/Kconfig11
-rw-r--r--drivers/leds/simple/Makefile3
-rw-r--r--drivers/leds/simple/simatic-ipc-leds-gpio.c139
-rw-r--r--drivers/leds/simple/simatic-ipc-leds.c134
-rw-r--r--drivers/leds/trigger/Kconfig157
-rw-r--r--drivers/leds/trigger/Makefile18
-rw-r--r--drivers/leds/trigger/ledtrig-activity.c270
-rw-r--r--drivers/leds/trigger/ledtrig-audio.c65
-rw-r--r--drivers/leds/trigger/ledtrig-backlight.c142
-rw-r--r--drivers/leds/trigger/ledtrig-camera.c53
-rw-r--r--drivers/leds/trigger/ledtrig-cpu.c172
-rw-r--r--drivers/leds/trigger/ledtrig-default-on.c30
-rw-r--r--drivers/leds/trigger/ledtrig-disk.c47
-rw-r--r--drivers/leds/trigger/ledtrig-gpio.c202
-rw-r--r--drivers/leds/trigger/ledtrig-heartbeat.c213
-rw-r--r--drivers/leds/trigger/ledtrig-mtd.c41
-rw-r--r--drivers/leds/trigger/ledtrig-netdev.c465
-rw-r--r--drivers/leds/trigger/ledtrig-oneshot.c200
-rw-r--r--drivers/leds/trigger/ledtrig-panic.c74
-rw-r--r--drivers/leds/trigger/ledtrig-pattern.c463
-rw-r--r--drivers/leds/trigger/ledtrig-timer.c140
-rw-r--r--drivers/leds/trigger/ledtrig-transient.c198
-rw-r--r--drivers/leds/trigger/ledtrig-tty.c188
-rw-r--r--drivers/leds/uleds.c226
135 files changed, 42751 insertions, 0 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
new file mode 100644
index 000000000..509d03eb3
--- /dev/null
+++ b/drivers/leds/Kconfig
@@ -0,0 +1,882 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config LEDS_GPIO_REGISTER
+ bool
+ help
+ This option provides the function gpio_led_register_device.
+ As this function is used by arch code it must not be compiled as a
+ module.
+
+menuconfig NEW_LEDS
+ bool "LED Support"
+ help
+ Say Y to enable Linux LED support. This allows control of supported
+ LEDs from both userspace and optionally, by kernel events (triggers).
+
+if NEW_LEDS
+
+config LEDS_CLASS
+ tristate "LED Class Support"
+ help
+ This option enables the LED sysfs class in /sys/class/leds. You'll
+ need this to do anything useful with LEDs. If unsure, say Y.
+
+config LEDS_CLASS_FLASH
+ tristate "LED Flash Class Support"
+ depends on LEDS_CLASS
+ help
+ This option enables the flash LED sysfs class in /sys/class/leds.
+ It wraps LED Class and adds flash LEDs specific sysfs attributes
+ and kernel internal API to it. You'll need this to provide support
+ for the flash related features of a LED device. It can be built
+ as a module.
+
+config LEDS_CLASS_MULTICOLOR
+ tristate "LED Multicolor Class Support"
+ depends on LEDS_CLASS
+ help
+ This option enables the multicolor LED sysfs class in /sys/class/leds.
+ It wraps LED class and adds multicolor LED specific sysfs attributes
+ and kernel internal API to it. You'll need this to provide support
+ for multicolor LEDs that are grouped together. This class is not
+ intended for single color LEDs. It can be built as a module.
+
+config LEDS_BRIGHTNESS_HW_CHANGED
+ bool "LED Class brightness_hw_changed attribute support"
+ depends on LEDS_CLASS
+ help
+ This option enables support for the brightness_hw_changed attribute
+ for LED sysfs class devices under /sys/class/leds.
+
+ See Documentation/ABI/testing/sysfs-class-led for details.
+
+comment "LED drivers"
+
+config LEDS_88PM860X
+ tristate "LED Support for Marvell 88PM860x PMIC"
+ depends on LEDS_CLASS
+ depends on MFD_88PM860X
+ help
+ This option enables support for on-chip LED drivers found on Marvell
+ Semiconductor 88PM8606 PMIC.
+
+config LEDS_AN30259A
+ tristate "LED support for Panasonic AN30259A"
+ depends on LEDS_CLASS && I2C && OF
+ help
+ This option enables support for the AN30259A 3-channel
+ LED driver.
+
+ To compile this driver as a module, choose M here: the module
+ will be called leds-an30259a.
+
+config LEDS_APU
+ tristate "Front panel LED support for PC Engines APU/APU2/APU3 boards"
+ depends on LEDS_CLASS
+ depends on X86 && DMI
+ help
+ This driver makes the PC Engines APU1 front panel LEDs
+ accessible from userspace programs through the LED subsystem.
+
+ If you're looking for APU2/3, use the pcengines-apu2 driver.
+ (symbol CONFIG_PCENGINES_APU2)
+
+ To compile this driver as a module, choose M here: the
+ module will be called leds-apu.
+
+config LEDS_ARIEL
+ tristate "Dell Wyse 3020 status LED support"
+ depends on LEDS_CLASS
+ depends on (MACH_MMP3_DT && MFD_ENE_KB3930) || COMPILE_TEST
+ help
+ This driver adds support for controlling the front panel status
+ LEDs on Dell Wyse 3020 (Ariel) board via the KB3930 Embedded
+ Controller.
+
+ Say Y to if your machine is a Dell Wyse 3020 thin client.
+
+config LEDS_AW2013
+ tristate "LED support for Awinic AW2013"
+ depends on LEDS_CLASS && I2C && OF
+ select REGMAP_I2C
+ help
+ This option enables support for the AW2013 3-channel
+ LED driver.
+
+ To compile this driver as a module, choose M here: the module
+ will be called leds-aw2013.
+
+config LEDS_BCM6328
+ tristate "LED Support for Broadcom BCM6328"
+ depends on LEDS_CLASS
+ depends on HAS_IOMEM
+ depends on OF
+ help
+ This option enables support for LEDs connected to the BCM6328
+ LED HW controller accessed via MMIO registers.
+
+config LEDS_BCM6358
+ tristate "LED Support for Broadcom BCM6358"
+ depends on LEDS_CLASS
+ depends on HAS_IOMEM
+ depends on OF
+ help
+ This option enables support for LEDs connected to the BCM6358
+ LED HW controller accessed via MMIO registers.
+
+config LEDS_CPCAP
+ tristate "LED Support for Motorola CPCAP"
+ depends on LEDS_CLASS
+ depends on MFD_CPCAP
+ depends on OF
+ help
+ This option enables support for LEDs offered by Motorola's
+ CPCAP PMIC.
+
+config LEDS_CR0014114
+ tristate "LED Support for Crane CR0014114"
+ depends on LEDS_CLASS
+ depends on SPI
+ depends on OF
+ help
+ This option enables support for CR0014114 LED Board which
+ is widely used in vending machines produced by
+ Crane Merchandising Systems.
+
+ To compile this driver as a module, choose M here: the module
+ will be called leds-cr0014114.
+
+config LEDS_EL15203000
+ tristate "LED Support for Crane EL15203000"
+ depends on LEDS_CLASS
+ depends on SPI
+ depends on OF
+ help
+ This option enables support for EL15203000 LED Board
+ (aka RED LED board) which is widely used in coffee vending
+ machines produced by Crane Merchandising Systems.
+
+ To compile this driver as a module, choose M here: the module
+ will be called leds-el15203000.
+
+config LEDS_TURRIS_OMNIA
+ tristate "LED support for CZ.NIC's Turris Omnia"
+ depends on LEDS_CLASS_MULTICOLOR
+ depends on I2C
+ depends on MACH_ARMADA_38X || COMPILE_TEST
+ depends on OF
+ help
+ This option enables basic support for the LEDs found on the front
+ side of CZ.NIC's Turris Omnia router. There are 12 RGB LEDs on the
+ front panel.
+
+config LEDS_LM3530
+ tristate "LCD Backlight driver for LM3530"
+ depends on LEDS_CLASS
+ depends on I2C
+ help
+ This option enables support for the LCD backlight using
+ LM3530 ambient light sensor chip. This ALS chip can be
+ controlled manually or using PWM input or using ambient
+ light automatically.
+
+config LEDS_LM3532
+ tristate "LCD Backlight driver for LM3532"
+ select REGMAP_I2C
+ depends on LEDS_CLASS
+ depends on I2C
+ help
+ This option enables support for the LCD backlight using
+ LM3532 ambient light sensor chip. This ALS chip can be
+ controlled manually or using PWM input or using ambient
+ light automatically.
+
+config LEDS_LM3533
+ tristate "LED support for LM3533"
+ depends on LEDS_CLASS
+ depends on MFD_LM3533
+ help
+ This option enables support for the LEDs on National Semiconductor /
+ TI LM3533 Lighting Power chips.
+
+ The LEDs can be controlled directly, through PWM input, or by the
+ ambient-light-sensor interface. The chip supports
+ hardware-accelerated blinking with maximum on and off periods of 9.8
+ and 77 seconds respectively.
+
+config LEDS_LM3642
+ tristate "LED support for LM3642 Chip"
+ depends on LEDS_CLASS && I2C
+ select REGMAP_I2C
+ help
+ This option enables support for LEDs connected to LM3642.
+ The LM3642 is a 4MHz fixed-frequency synchronous boost
+ converter plus 1.5A constant current driver for a high-current
+ white LED.
+
+config LEDS_LM3692X
+ tristate "LED support for LM3692x Chips"
+ depends on LEDS_CLASS && I2C && OF
+ select REGMAP_I2C
+ help
+ This option enables support for the TI LM3692x family
+ of white LED string drivers used for backlighting.
+
+config LEDS_LOCOMO
+ tristate "LED Support for Locomo device"
+ depends on LEDS_CLASS
+ depends on SHARP_LOCOMO
+ help
+ This option enables support for the LEDs on Sharp Locomo.
+ Zaurus models SL-5500 and SL-5600.
+
+config LEDS_MIKROTIK_RB532
+ tristate "LED Support for Mikrotik Routerboard 532"
+ depends on LEDS_CLASS
+ depends on MIKROTIK_RB532
+ help
+ This option enables support for the so called "User LED" of
+ Mikrotik's Routerboard 532.
+
+config LEDS_MT6323
+ tristate "LED Support for Mediatek MT6323 PMIC"
+ depends on LEDS_CLASS
+ depends on MFD_MT6397
+ help
+ This option enables support for on-chip LED drivers found on
+ Mediatek MT6323 PMIC.
+
+config LEDS_S3C24XX
+ tristate "LED Support for Samsung S3C24XX GPIO LEDs"
+ depends on LEDS_CLASS
+ depends on ARCH_S3C24XX || COMPILE_TEST
+ help
+ This option enables support for LEDs connected to GPIO lines
+ on Samsung S3C24XX series CPUs, such as the S3C2410 and S3C2440.
+
+config LEDS_NET48XX
+ tristate "LED Support for Soekris net48xx series Error LED"
+ depends on LEDS_CLASS
+ depends on SCx200_GPIO
+ help
+ This option enables support for the Soekris net4801 and net4826 error
+ LED.
+
+config LEDS_WRAP
+ tristate "LED Support for the WRAP series LEDs"
+ depends on LEDS_CLASS
+ depends on SCx200_GPIO
+ help
+ This option enables support for the PCEngines WRAP programmable LEDs.
+
+config LEDS_COBALT_QUBE
+ tristate "LED Support for the Cobalt Qube series front LED"
+ depends on LEDS_CLASS
+ depends on MIPS_COBALT || COMPILE_TEST
+ help
+ This option enables support for the front LED on Cobalt Qube series
+
+config LEDS_COBALT_RAQ
+ bool "LED Support for the Cobalt Raq series"
+ depends on LEDS_CLASS=y && (MIPS_COBALT || COMPILE_TEST)
+ select LEDS_TRIGGERS
+ help
+ This option enables support for the Cobalt Raq series LEDs.
+
+config LEDS_SUNFIRE
+ tristate "LED support for SunFire servers."
+ depends on LEDS_CLASS
+ depends on SPARC64
+ select LEDS_TRIGGERS
+ help
+ This option enables support for the Left, Middle, and Right
+ LEDs on the I/O and CPU boards of SunFire UltraSPARC servers.
+
+config LEDS_IPAQ_MICRO
+ tristate "LED Support for the Compaq iPAQ h3xxx"
+ depends on LEDS_CLASS
+ depends on MFD_IPAQ_MICRO
+ help
+ Choose this option if you want to use the notification LED on
+ Compaq/HP iPAQ h3100 and h3600.
+
+config LEDS_HP6XX
+ tristate "LED Support for the HP Jornada 6xx"
+ depends on LEDS_CLASS
+ depends on SH_HP6XX
+ help
+ This option enables LED support for the handheld
+ HP Jornada 620/660/680/690.
+
+config LEDS_PCA9532
+ tristate "LED driver for PCA9532 dimmer"
+ depends on LEDS_CLASS
+ depends on I2C && INPUT
+ help
+ This option enables support for NXP pca9532
+ LED controller. It is generally only useful
+ as a platform driver
+
+config LEDS_PCA9532_GPIO
+ bool "Enable GPIO support for PCA9532"
+ depends on LEDS_PCA9532
+ depends on GPIOLIB
+ help
+ Allow unused pins on PCA9532 to be used as gpio.
+
+ To use a pin as gpio pca9532_type in pca9532_platform data needs to
+ set to PCA9532_TYPE_GPIO.
+
+config LEDS_GPIO
+ tristate "LED Support for GPIO connected LEDs"
+ depends on LEDS_CLASS
+ depends on GPIOLIB || COMPILE_TEST
+ help
+ This option enables support for the LEDs connected to GPIO
+ outputs. To be useful the particular board must have LEDs
+ and they must be connected to the GPIO lines. The LEDs must be
+ defined as platform devices and/or OpenFirmware platform devices.
+ The code to use these bindings can be selected below.
+
+config LEDS_LP3944
+ tristate "LED Support for N.S. LP3944 (Fun Light) I2C chip"
+ depends on LEDS_CLASS
+ depends on I2C
+ help
+ This option enables support for LEDs connected to the National
+ Semiconductor LP3944 Lighting Management Unit (LMU) also known as
+ Fun Light Chip.
+
+ To compile this driver as a module, choose M here: the
+ module will be called leds-lp3944.
+
+config LEDS_LP3952
+ tristate "LED Support for TI LP3952 2 channel LED driver"
+ depends on LEDS_CLASS
+ depends on I2C
+ depends on GPIOLIB
+ select REGMAP_I2C
+ help
+ This option enables support for LEDs connected to the Texas
+ Instruments LP3952 LED driver.
+
+ To compile this driver as a module, choose M here: the
+ module will be called leds-lp3952.
+
+config LEDS_LP50XX
+ tristate "LED Support for TI LP5036/30/24/18/12/09 LED driver chip"
+ depends on LEDS_CLASS && REGMAP_I2C
+ depends on LEDS_CLASS_MULTICOLOR || !LEDS_CLASS_MULTICOLOR
+ help
+ If you say yes here you get support for the Texas Instruments
+ LP5036, LP5030, LP5024, LP5018, LP5012 and LP5009 LED driver.
+
+ To compile this driver as a module, choose M here: the
+ module will be called leds-lp50xx.
+
+config LEDS_LP55XX_COMMON
+ tristate "Common Driver for TI/National LP5521/5523/55231/5562/8501"
+ depends on LEDS_CLASS
+ depends on LEDS_CLASS_MULTICOLOR || !LEDS_CLASS_MULTICOLOR
+ depends on OF
+ depends on I2C
+ select FW_LOADER
+ select FW_LOADER_USER_HELPER
+ help
+ This option supports common operations for LP5521/5523/55231/5562/8501
+ devices.
+
+config LEDS_LP5521
+ tristate "LED Support for N.S. LP5521 LED driver chip"
+ depends on LEDS_CLASS && I2C
+ depends on LEDS_LP55XX_COMMON
+ help
+ If you say yes here you get support for the National Semiconductor
+ LP5521 LED driver. It is 3 channel chip with programmable engines.
+ Driver provides direct control via LED class and interface for
+ programming the engines.
+
+config LEDS_LP5523
+ tristate "LED Support for TI/National LP5523/55231 LED driver chip"
+ depends on LEDS_CLASS && I2C
+ depends on LEDS_LP55XX_COMMON
+ help
+ If you say yes here you get support for TI/National Semiconductor
+ LP5523/55231 LED driver.
+ It is 9 channel chip with programmable engines.
+ Driver provides direct control via LED class and interface for
+ programming the engines.
+
+config LEDS_LP5562
+ tristate "LED Support for TI LP5562 LED driver chip"
+ depends on LEDS_CLASS && I2C
+ depends on LEDS_LP55XX_COMMON
+ help
+ If you say yes here you get support for TI LP5562 LED driver.
+ It is 4 channels chip with programmable engines.
+ Driver provides direct control via LED class and interface for
+ programming the engines.
+
+config LEDS_LP8501
+ tristate "LED Support for TI LP8501 LED driver chip"
+ depends on LEDS_CLASS && I2C
+ depends on LEDS_LP55XX_COMMON
+ help
+ If you say yes here you get support for TI LP8501 LED driver.
+ It is 9 channel chip with programmable engines.
+ Driver provides direct control via LED class and interface for
+ programming the engines.
+ It is similar as LP5523, but output power selection is available.
+ And register layout and engine program schemes are different.
+
+config LEDS_LP8788
+ tristate "LED support for the TI LP8788 PMIC"
+ depends on LEDS_CLASS
+ depends on MFD_LP8788
+ help
+ This option enables support for the Keyboard LEDs on the LP8788 PMIC.
+
+config LEDS_LP8860
+ tristate "LED support for the TI LP8860 4 channel LED driver"
+ depends on LEDS_CLASS && I2C && OF
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the TI LP8860 4 channel
+ LED driver.
+ This option enables support for the display cluster LEDs
+ on the LP8860 4 channel LED driver using the I2C communication
+ bus.
+
+config LEDS_CLEVO_MAIL
+ tristate "Mail LED on Clevo notebook"
+ depends on LEDS_CLASS && BROKEN
+ depends on X86 && SERIO_I8042 && DMI
+ help
+ This driver makes the mail LED accessible from userspace
+ programs through the LEDs subsystem. This LED has three
+ known modes: off, blink at 0.5Hz and blink at 1Hz.
+
+ The driver supports two kinds of interface: using ledtrig-timer
+ or through /sys/class/leds/clevo::mail/brightness. As this LED
+ cannot change its brightness it blinks instead. The brightness
+ value 0 means off, 1..127 means blink at 0.5Hz and 128..255 means
+ blink at 1Hz.
+
+ This module can drive the mail LED for the following notebooks:
+
+ Clevo D400P
+ Clevo D410J
+ Clevo D410V
+ Clevo D400V/D470V (not tested, but might work)
+ Clevo M540N
+ Clevo M5x0N (not tested, but might work)
+ Positivo Mobile (Clevo M5x0V)
+
+ If your model is not listed here you can try the "nodetect"
+ module parameter.
+
+ To compile this driver as a module, choose M here: the
+ module will be called leds-clevo-mail.
+
+config LEDS_PCA955X
+ tristate "LED Support for PCA955x I2C chips"
+ depends on LEDS_CLASS
+ depends on I2C
+ help
+ This option enables support for LEDs connected to PCA955x
+ LED driver chips accessed via the I2C bus. Supported
+ devices include PCA9550, PCA9551, PCA9552, and PCA9553.
+
+config LEDS_PCA955X_GPIO
+ bool "Enable GPIO support for PCA955X"
+ depends on LEDS_PCA955X
+ depends on GPIOLIB
+ help
+ Allow unused pins on PCA955X to be used as gpio.
+
+ To use a pin as gpio the pin type should be set to
+ PCA955X_TYPE_GPIO in the device tree.
+
+
+config LEDS_PCA963X
+ tristate "LED support for PCA963x I2C chip"
+ depends on LEDS_CLASS
+ depends on I2C
+ help
+ This option enables support for LEDs connected to the PCA963x
+ LED driver chip accessed via the I2C bus. Supported
+ devices include PCA9633 and PCA9634
+
+config LEDS_WM831X_STATUS
+ tristate "LED support for status LEDs on WM831x PMICs"
+ depends on LEDS_CLASS
+ depends on MFD_WM831X
+ help
+ This option enables support for the status LEDs of the WM831x
+ series of PMICs.
+
+config LEDS_WM8350
+ tristate "LED Support for WM8350 AudioPlus PMIC"
+ depends on LEDS_CLASS
+ depends on MFD_WM8350
+ help
+ This option enables support for LEDs driven by the Wolfson
+ Microelectronics WM8350 AudioPlus PMIC.
+
+config LEDS_DA903X
+ tristate "LED Support for DA9030/DA9034 PMIC"
+ depends on LEDS_CLASS
+ depends on PMIC_DA903X
+ help
+ This option enables support for on-chip LED drivers found
+ on Dialog Semiconductor DA9030/DA9034 PMICs.
+
+config LEDS_DA9052
+ tristate "Dialog DA9052/DA9053 LEDS"
+ depends on LEDS_CLASS
+ depends on PMIC_DA9052
+ help
+ This option enables support for on-chip LED drivers found
+ on Dialog Semiconductor DA9052-BC and DA9053-AA/Bx PMICs.
+
+config LEDS_DAC124S085
+ tristate "LED Support for DAC124S085 SPI DAC"
+ depends on LEDS_CLASS
+ depends on SPI
+ help
+ This option enables support for DAC124S085 SPI DAC from NatSemi,
+ which can be used to control up to four LEDs.
+
+config LEDS_PWM
+ tristate "PWM driven LED Support"
+ depends on LEDS_CLASS
+ depends on PWM
+ help
+ This option enables support for pwm driven LEDs
+
+config LEDS_REGULATOR
+ tristate "REGULATOR driven LED support"
+ depends on LEDS_CLASS
+ depends on REGULATOR
+ help
+ This option enables support for regulator driven LEDs.
+
+config LEDS_BD2802
+ tristate "LED driver for BD2802 RGB LED"
+ depends on LEDS_CLASS
+ depends on I2C
+ help
+ This option enables support for BD2802GU RGB LED driver chips
+ accessed via the I2C bus.
+
+config LEDS_INTEL_SS4200
+ tristate "LED driver for Intel NAS SS4200 series"
+ depends on LEDS_CLASS
+ depends on PCI && DMI
+ depends on X86
+ help
+ This option enables support for the Intel SS4200 series of
+ Network Attached Storage servers. You may control the hard
+ drive or power LEDs on the front panel. Using this driver
+ can stop the front LED from blinking after startup.
+
+config LEDS_LT3593
+ tristate "LED driver for LT3593 controllers"
+ depends on LEDS_CLASS
+ depends on GPIOLIB || COMPILE_TEST
+ help
+ This option enables support for LEDs driven by a Linear Technology
+ LT3593 controller. This controller uses a special one-wire pulse
+ coding protocol to set the brightness.
+
+config LEDS_ADP5520
+ tristate "LED Support for ADP5520/ADP5501 PMIC"
+ depends on LEDS_CLASS
+ depends on PMIC_ADP5520
+ help
+ This option enables support for on-chip LED drivers found
+ on Analog Devices ADP5520/ADP5501 PMICs.
+
+ To compile this driver as a module, choose M here: the module will
+ be called leds-adp5520.
+
+config LEDS_MC13783
+ tristate "LED Support for MC13XXX PMIC"
+ depends on LEDS_CLASS
+ depends on MFD_MC13XXX
+ help
+ This option enables support for on-chip LED drivers found
+ on Freescale Semiconductor MC13783/MC13892/MC34708 PMIC.
+
+config LEDS_NS2
+ tristate "LED support for Network Space v2 GPIO LEDs"
+ depends on LEDS_CLASS
+ depends on MACH_KIRKWOOD || MACH_ARMADA_370 || COMPILE_TEST
+ default y
+ help
+ This option enables support for the dual-GPIO LEDs found on the
+ following LaCie/Seagate boards:
+
+ Network Space v2 (and parents: Max, Mini)
+ Internet Space v2
+ d2 Network v2
+ n090401 (Seagate NAS 4-Bay)
+
+config LEDS_NETXBIG
+ tristate "LED support for Big Network series LEDs"
+ depends on LEDS_CLASS
+ depends on MACH_KIRKWOOD || COMPILE_TEST
+ depends on OF_GPIO
+ default y
+ help
+ This option enables support for LEDs found on the LaCie 2Big
+ and 5Big Network v2 boards. The LEDs are wired to a CPLD and are
+ controlled through a GPIO extension bus.
+
+config LEDS_ASIC3
+ bool "LED support for the HTC ASIC3"
+ depends on LEDS_CLASS=y
+ depends on MFD_ASIC3
+ default y
+ help
+ This option enables support for the LEDs on the HTC ASIC3. The HTC
+ ASIC3 LED GPIOs are inputs, not outputs, thus the leds-gpio driver
+ cannot be used. This driver supports hardware blinking with an on+off
+ period from 62ms to 125s. Say Y to enable LEDs on the HP iPAQ hx4700.
+
+config LEDS_TCA6507
+ tristate "LED Support for TCA6507 I2C chip"
+ depends on LEDS_CLASS && I2C
+ help
+ This option enables support for LEDs connected to TC6507
+ LED driver chips accessed via the I2C bus.
+ Driver support brightness control and hardware-assisted blinking.
+
+config LEDS_TLC591XX
+ tristate "LED driver for TLC59108 and TLC59116 controllers"
+ depends on LEDS_CLASS && I2C
+ select REGMAP_I2C
+ help
+ This option enables support for Texas Instruments TLC59108
+ and TLC59116 LED controllers.
+
+config LEDS_MAX77650
+ tristate "LED support for Maxim MAX77650 PMIC"
+ depends on LEDS_CLASS && MFD_MAX77650
+ help
+ LEDs driver for MAX77650 family of PMICs from Maxim Integrated.
+
+config LEDS_MAX8997
+ tristate "LED support for MAX8997 PMIC"
+ depends on LEDS_CLASS && MFD_MAX8997
+ help
+ This option enables support for on-chip LED drivers on
+ MAXIM MAX8997 PMIC.
+
+config LEDS_LM355x
+ tristate "LED support for LM3554 and LM3556 chips"
+ depends on LEDS_CLASS && I2C
+ select REGMAP_I2C
+ help
+ This option enables support for LEDs connected to LM3554
+ and LM3556. It includes Torch, Flash and Indicator functions.
+
+config LEDS_OT200
+ tristate "LED support for the Bachmann OT200"
+ depends on LEDS_CLASS && HAS_IOMEM && (X86_32 || COMPILE_TEST)
+ help
+ This option enables support for the LEDs on the Bachmann OT200.
+ Say Y to enable LEDs on the Bachmann OT200.
+
+config LEDS_MENF21BMC
+ tristate "LED support for the MEN 14F021P00 BMC"
+ depends on LEDS_CLASS && MFD_MENF21BMC
+ help
+ Say Y here to include support for the MEN 14F021P00 BMC LEDs.
+
+ This driver can also be built as a module. If so the module
+ will be called leds-menf21bmc.
+
+config LEDS_IS31FL319X
+ tristate "LED Support for ISSI IS31FL319x I2C LED controller family"
+ depends on LEDS_CLASS && I2C
+ select REGMAP_I2C
+ help
+ This option enables support for LEDs connected to ISSI IS31FL319x
+ fancy LED driver chips accessed via the I2C bus.
+ Driver supports individual PWM brightness control for each channel.
+
+ This driver can also be built as a module. If so the module will be
+ called leds-is31fl319x.
+
+config LEDS_IS31FL32XX
+ tristate "LED support for ISSI IS31FL32XX I2C LED controller family"
+ depends on LEDS_CLASS && I2C && OF
+ help
+ Say Y here to include support for ISSI IS31FL32XX and Si-En SN32xx
+ LED controllers. They are I2C devices with multiple constant-current
+ channels, each with independent 256-level PWM control.
+
+config LEDS_SC27XX_BLTC
+ tristate "LED support for the SC27xx breathing light controller"
+ depends on LEDS_CLASS && MFD_SC27XX_PMIC
+ depends on OF
+ help
+ Say Y here to include support for the SC27xx breathing light controller
+ LEDs.
+
+ This driver can also be built as a module. If so the module will be
+ called leds-sc27xx-bltc.
+
+comment "LED driver for blink(1) USB RGB LED is under Special HID drivers (HID_THINGM)"
+
+config LEDS_BLINKM
+ tristate "LED support for the BlinkM I2C RGB LED"
+ depends on LEDS_CLASS
+ depends on I2C
+ help
+ This option enables support for the BlinkM RGB LED connected
+ through I2C. Say Y to enable support for the BlinkM LED.
+
+config LEDS_POWERNV
+ tristate "LED support for PowerNV Platform"
+ depends on LEDS_CLASS
+ depends on PPC_POWERNV
+ depends on OF
+ help
+ This option enables support for the system LEDs present on
+ PowerNV platforms. Say 'y' to enable this support in kernel.
+ To compile this driver as a module, choose 'm' here: the module
+ will be called leds-powernv.
+
+config LEDS_SYSCON
+ bool "LED support for LEDs on system controllers"
+ depends on LEDS_CLASS=y
+ depends on MFD_SYSCON
+ depends on OF
+ help
+ This option enables support for the LEDs on syscon type
+ devices. This will only work with device tree enabled
+ devices.
+
+config LEDS_PM8058
+ tristate "LED Support for the Qualcomm PM8058 PMIC"
+ depends on MFD_PM8XXX
+ depends on LEDS_CLASS
+ help
+ Choose this option if you want to use the LED drivers in
+ the Qualcomm PM8058 PMIC.
+
+config LEDS_MLXCPLD
+ tristate "LED support for the Mellanox boards"
+ depends on X86 && DMI
+ depends on LEDS_CLASS
+ help
+ This option enables support for the LEDs on the Mellanox
+ boards. Say Y to enable these.
+
+config LEDS_MLXREG
+ tristate "LED support for the Mellanox switches management control"
+ depends on LEDS_CLASS
+ help
+ This option enables support for the LEDs on the Mellanox Ethernet and
+ InfiniBand switches. The driver can be activated by the platform device
+ device add call. Say Y to enable these. To compile this driver as a
+ module, choose 'M' here: the module will be called leds-mlxreg.
+
+config LEDS_USER
+ tristate "Userspace LED support"
+ depends on LEDS_CLASS
+ help
+ This option enables support for userspace LEDs. Say 'y' to enable this
+ support in kernel. To compile this driver as a module, choose 'm' here:
+ the module will be called uleds.
+
+config LEDS_NIC78BX
+ tristate "LED support for NI PXI NIC78bx devices"
+ depends on LEDS_CLASS
+ depends on X86 && ACPI
+ help
+ This option enables support for the User1 and User2 LEDs on NI
+ PXI NIC78bx devices.
+
+ To compile this driver as a module, choose M here: the module
+ will be called leds-nic78bx.
+
+config LEDS_SPI_BYTE
+ tristate "LED support for SPI LED controller with a single byte"
+ depends on LEDS_CLASS
+ depends on SPI
+ depends on OF
+ help
+ This option enables support for LED controller which use a single byte
+ for controlling the brightness. Currently the following controller is
+ supported: Ubiquiti airCube ISP microcontroller based LED controller.
+
+config LEDS_TI_LMU_COMMON
+ tristate "LED driver for TI LMU"
+ depends on LEDS_CLASS
+ select REGMAP
+ help
+ Say Y to enable the LED driver for TI LMU devices.
+ This supports common features between the TI LM3532, LM3631, LM3632,
+ LM3633, LM3695 and LM3697.
+
+config LEDS_LM3697
+ tristate "LED driver for LM3697"
+ depends on LEDS_TI_LMU_COMMON
+ depends on I2C && OF
+ help
+ Say Y to enable the LM3697 LED driver for TI LMU devices.
+ This supports the LED device LM3697.
+
+config LEDS_LM36274
+ tristate "LED driver for LM36274"
+ depends on LEDS_TI_LMU_COMMON
+ depends on MFD_TI_LMU
+ help
+ Say Y to enable the LM36274 LED driver for TI LMU devices.
+ This supports the LED device LM36274.
+
+config LEDS_TPS6105X
+ tristate "LED support for TI TPS6105X"
+ depends on LEDS_CLASS
+ depends on TPS6105X
+ default y if TPS6105X
+ help
+ This driver supports TPS61050/TPS61052 LED chips.
+ It is a single boost converter primarily for white LEDs and
+ audio amplifiers.
+
+config LEDS_IP30
+ tristate "LED support for SGI Octane machines"
+ depends on LEDS_CLASS
+ depends on SGI_MFD_IOC3 || COMPILE_TEST
+ help
+ This option enables support for the Red and White LEDs of
+ SGI Octane machines.
+
+ To compile this driver as a module, choose M here: the module
+ will be called leds-ip30.
+
+config LEDS_ACER_A500
+ tristate "Power button LED support for Acer Iconia Tab A500"
+ depends on LEDS_CLASS && MFD_ACER_A500_EC
+ help
+ This option enables support for the Power Button LED of
+ Acer Iconia Tab A500.
+
+source "drivers/leds/blink/Kconfig"
+
+comment "Flash and Torch LED drivers"
+source "drivers/leds/flash/Kconfig"
+
+comment "RGB LED drivers"
+source "drivers/leds/rgb/Kconfig"
+
+comment "LED Triggers"
+source "drivers/leds/trigger/Kconfig"
+
+comment "Simple LED drivers"
+source "drivers/leds/simple/Kconfig"
+
+endif # NEW_LEDS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
new file mode 100644
index 000000000..4fd2f92cd
--- /dev/null
+++ b/drivers/leds/Makefile
@@ -0,0 +1,112 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# LED Core
+obj-$(CONFIG_NEW_LEDS) += led-core.o
+obj-$(CONFIG_LEDS_CLASS) += led-class.o
+obj-$(CONFIG_LEDS_CLASS_FLASH) += led-class-flash.o
+obj-$(CONFIG_LEDS_CLASS_MULTICOLOR) += led-class-multicolor.o
+obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o
+
+# LED Platform Drivers (keep this sorted, M-| sort)
+obj-$(CONFIG_LEDS_88PM860X) += leds-88pm860x.o
+obj-$(CONFIG_LEDS_ACER_A500) += leds-acer-a500.o
+obj-$(CONFIG_LEDS_ADP5520) += leds-adp5520.o
+obj-$(CONFIG_LEDS_AN30259A) += leds-an30259a.o
+obj-$(CONFIG_LEDS_APU) += leds-apu.o
+obj-$(CONFIG_LEDS_ARIEL) += leds-ariel.o
+obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o
+obj-$(CONFIG_LEDS_AW2013) += leds-aw2013.o
+obj-$(CONFIG_LEDS_BCM6328) += leds-bcm6328.o
+obj-$(CONFIG_LEDS_BCM6358) += leds-bcm6358.o
+obj-$(CONFIG_LEDS_BD2802) += leds-bd2802.o
+obj-$(CONFIG_LEDS_BLINKM) += leds-blinkm.o
+obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
+obj-$(CONFIG_LEDS_COBALT_QUBE) += leds-cobalt-qube.o
+obj-$(CONFIG_LEDS_COBALT_RAQ) += leds-cobalt-raq.o
+obj-$(CONFIG_LEDS_CPCAP) += leds-cpcap.o
+obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o
+obj-$(CONFIG_LEDS_DA9052) += leds-da9052.o
+obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o
+obj-$(CONFIG_LEDS_GPIO_REGISTER) += leds-gpio-register.o
+obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
+obj-$(CONFIG_LEDS_INTEL_SS4200) += leds-ss4200.o
+obj-$(CONFIG_LEDS_IP30) += leds-ip30.o
+obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o
+obj-$(CONFIG_LEDS_IS31FL319X) += leds-is31fl319x.o
+obj-$(CONFIG_LEDS_IS31FL32XX) += leds-is31fl32xx.o
+obj-$(CONFIG_LEDS_LM3530) += leds-lm3530.o
+obj-$(CONFIG_LEDS_LM3532) += leds-lm3532.o
+obj-$(CONFIG_LEDS_LM3533) += leds-lm3533.o
+obj-$(CONFIG_LEDS_LM355x) += leds-lm355x.o
+obj-$(CONFIG_LEDS_LM36274) += leds-lm36274.o
+obj-$(CONFIG_LEDS_LM3642) += leds-lm3642.o
+obj-$(CONFIG_LEDS_LM3692X) += leds-lm3692x.o
+obj-$(CONFIG_LEDS_LM3697) += leds-lm3697.o
+obj-$(CONFIG_LEDS_LOCOMO) += leds-locomo.o
+obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o
+obj-$(CONFIG_LEDS_LP3952) += leds-lp3952.o
+obj-$(CONFIG_LEDS_LP50XX) += leds-lp50xx.o
+obj-$(CONFIG_LEDS_LP5521) += leds-lp5521.o
+obj-$(CONFIG_LEDS_LP5523) += leds-lp5523.o
+obj-$(CONFIG_LEDS_LP5562) += leds-lp5562.o
+obj-$(CONFIG_LEDS_LP55XX_COMMON) += leds-lp55xx-common.o
+obj-$(CONFIG_LEDS_LP8501) += leds-lp8501.o
+obj-$(CONFIG_LEDS_LP8788) += leds-lp8788.o
+obj-$(CONFIG_LEDS_LP8860) += leds-lp8860.o
+obj-$(CONFIG_LEDS_LT3593) += leds-lt3593.o
+obj-$(CONFIG_LEDS_MAX77650) += leds-max77650.o
+obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o
+obj-$(CONFIG_LEDS_MC13783) += leds-mc13783.o
+obj-$(CONFIG_LEDS_MENF21BMC) += leds-menf21bmc.o
+obj-$(CONFIG_LEDS_MIKROTIK_RB532) += leds-rb532.o
+obj-$(CONFIG_LEDS_MLXCPLD) += leds-mlxcpld.o
+obj-$(CONFIG_LEDS_MLXREG) += leds-mlxreg.o
+obj-$(CONFIG_LEDS_MT6323) += leds-mt6323.o
+obj-$(CONFIG_LEDS_NET48XX) += leds-net48xx.o
+obj-$(CONFIG_LEDS_NETXBIG) += leds-netxbig.o
+obj-$(CONFIG_LEDS_NIC78BX) += leds-nic78bx.o
+obj-$(CONFIG_LEDS_NS2) += leds-ns2.o
+obj-$(CONFIG_LEDS_OT200) += leds-ot200.o
+obj-$(CONFIG_LEDS_PCA9532) += leds-pca9532.o
+obj-$(CONFIG_LEDS_PCA955X) += leds-pca955x.o
+obj-$(CONFIG_LEDS_PCA963X) += leds-pca963x.o
+obj-$(CONFIG_LEDS_PM8058) += leds-pm8058.o
+obj-$(CONFIG_LEDS_POWERNV) += leds-powernv.o
+obj-$(CONFIG_LEDS_PWM) += leds-pwm.o
+obj-$(CONFIG_LEDS_REGULATOR) += leds-regulator.o
+obj-$(CONFIG_LEDS_S3C24XX) += leds-s3c24xx.o
+obj-$(CONFIG_LEDS_SC27XX_BLTC) += leds-sc27xx-bltc.o
+obj-$(CONFIG_LEDS_SUNFIRE) += leds-sunfire.o
+obj-$(CONFIG_LEDS_SYSCON) += leds-syscon.o
+obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o
+obj-$(CONFIG_LEDS_TI_LMU_COMMON) += leds-ti-lmu-common.o
+obj-$(CONFIG_LEDS_TLC591XX) += leds-tlc591xx.o
+obj-$(CONFIG_LEDS_TPS6105X) += leds-tps6105x.o
+obj-$(CONFIG_LEDS_TURRIS_OMNIA) += leds-turris-omnia.o
+obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o
+obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o
+obj-$(CONFIG_LEDS_WRAP) += leds-wrap.o
+
+# LED SPI Drivers
+obj-$(CONFIG_LEDS_CR0014114) += leds-cr0014114.o
+obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
+obj-$(CONFIG_LEDS_EL15203000) += leds-el15203000.o
+obj-$(CONFIG_LEDS_SPI_BYTE) += leds-spi-byte.o
+
+# LED Userspace Drivers
+obj-$(CONFIG_LEDS_USER) += uleds.o
+
+# Flash and Torch LED Drivers
+obj-$(CONFIG_LEDS_CLASS_FLASH) += flash/
+
+# RGB LED Drivers
+obj-$(CONFIG_LEDS_CLASS_MULTICOLOR) += rgb/
+
+# LED Triggers
+obj-$(CONFIG_LEDS_TRIGGERS) += trigger/
+
+# LED Blink
+obj-y += blink/
+
+# Simple LED drivers
+obj-y += simple/
diff --git a/drivers/leds/TODO b/drivers/leds/TODO
new file mode 100644
index 000000000..bfa60fa1d
--- /dev/null
+++ b/drivers/leds/TODO
@@ -0,0 +1,75 @@
+-*- org -*-
+
+* On/off LEDs should have max_brightness of 1
+* Get rid of enum led_brightness
+
+It is really an integer, as maximum is configurable. Get rid of it, or
+make it into typedef or something.
+
+* Review atomicity requirements in LED subsystem
+
+Calls that may and that may not block are mixed in same structure, and
+semantics is sometimes non-intuitive. (For example blink callback may
+not sleep.) Review the requirements for any bugs and document them
+clearly.
+
+* LED names are still a mess
+
+No two LEDs have same name, so the names are probably unusable for the
+userland. Nudge authors into creating common LED names for common
+functionality.
+
+? Perhaps check for known LED names during boot, and warn if there are
+LEDs not on the list?
+
+* Split drivers into subdirectories
+
+The number of drivers is getting big, and driver for on/off LED on a
+i/o port is really quite different from camera flash LED, which is
+really different from driver for RGB color LED that can run its own
+microcode. Split the drivers somehow.
+
+* Figure out what to do with RGB leds
+
+Multicolor is a bit too abstract. Yes, we can have
+Green-Magenta-Ultraviolet LED, but so far all the LEDs we support are
+RGB, and not even RGB-White or RGB-Yellow variants emerged.
+
+Multicolor is not a good fit for RGB LED. It does not really know
+about LED color. In particular, there's no way to make LED "white".
+
+Userspace is interested in knowing "this LED can produce arbitrary
+color", which not all multicolor LEDs can.
+
+ Proposal: let's add "rgb" to led_colors in drivers/leds/led-core.c,
+ add corresponding device tree defines, and use that, instead of
+ multicolor for RGB LEDs.
+
+ We really need to do that now; "white" stuff can wait.
+
+RGB LEDs are quite common, and it would be good to be able to turn LED
+white and to turn it into any arbitrary color. It is essential that
+userspace is able to set arbitrary colors, and it might be good to
+have that ability from kernel, too... to allow full-color triggers.
+
+* Command line utility to manipulate the LEDs?
+
+/sys interface is not really suitable to use by hand, should we have
+an utility to perform LED control?
+
+In particular, LED names are still a mess (see above) and utility
+could help there by presenting both old and new names while we clean
+them up.
+
+In future, I'd like utility to accept both old and new names while we
+clean them up.
+
+It would be also nice to have useful listing mode -- name, type,
+current brightness/trigger...
+
+In future, it would be good to be able to set rgb led to particular
+color.
+
+And probably user-friendly interface to access LEDs for particular
+ethernet interface would be nice.
+
diff --git a/drivers/leds/blink/Kconfig b/drivers/leds/blink/Kconfig
new file mode 100644
index 000000000..945c84286
--- /dev/null
+++ b/drivers/leds/blink/Kconfig
@@ -0,0 +1,31 @@
+config LEDS_BCM63138
+ tristate "LED Support for Broadcom BCM63138 SoC"
+ depends on LEDS_CLASS
+ depends on ARCH_BCM4908 || ARCH_BCM_5301X || BCM63XX || COMPILE_TEST
+ depends on HAS_IOMEM
+ depends on OF
+ default ARCH_BCM4908
+ help
+ This option enables support for LED controller that is part of
+ BCM63138 SoC. The same hardware block is known to be also used
+ in BCM4908, BCM6848, BCM6858, BCM63148, BCM63381 and BCM68360.
+
+ If compiled as module it will be called leds-bcm63138.
+
+config LEDS_LGM
+ tristate "LED support for LGM SoC series"
+ depends on X86 || COMPILE_TEST
+ depends on GPIOLIB && LEDS_CLASS && MFD_SYSCON && OF
+ help
+ This option enables support for LEDs connected to GPIO lines on
+ Lightning Mountain (LGM) SoC. Lightning Mountain is a AnyWAN
+ gateway-on-a-chip SoC to be shipped on mid and high end home
+ gateways and routers.
+
+ These LEDs are driven by a Serial Shift Output (SSO) controller.
+ The driver supports hardware blinking and the LEDs can be configured
+ to be triggered by software/CPU or by hardware.
+
+ Say 'Y' here if you are working on LGM SoC based platform. Otherwise,
+ say 'N'. To compile this driver as a module, choose M here: the module
+ will be called leds-lgm-sso.
diff --git a/drivers/leds/blink/Makefile b/drivers/leds/blink/Makefile
new file mode 100644
index 000000000..447029f41
--- /dev/null
+++ b/drivers/leds/blink/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_LEDS_BCM63138) += leds-bcm63138.o
+obj-$(CONFIG_LEDS_LGM) += leds-lgm-sso.o
diff --git a/drivers/leds/blink/leds-bcm63138.c b/drivers/leds/blink/leds-bcm63138.c
new file mode 100644
index 000000000..2cf2761e4
--- /dev/null
+++ b/drivers/leds/blink/leds-bcm63138.c
@@ -0,0 +1,307 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021 Rafał Miłecki <rafal@milecki.pl>
+ */
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+
+#define BCM63138_MAX_LEDS 32
+#define BCM63138_MAX_BRIGHTNESS 9
+
+#define BCM63138_LED_BITS 4 /* how many bits control a single LED */
+#define BCM63138_LED_MASK ((1 << BCM63138_LED_BITS) - 1) /* 0xf */
+#define BCM63138_LEDS_PER_REG (32 / BCM63138_LED_BITS) /* 8 */
+
+#define BCM63138_GLB_CTRL 0x00
+#define BCM63138_GLB_CTRL_SERIAL_LED_DATA_PPOL 0x00000002
+#define BCM63138_GLB_CTRL_SERIAL_LED_EN_POL 0x00000008
+#define BCM63138_MASK 0x04
+#define BCM63138_HW_LED_EN 0x08
+#define BCM63138_SERIAL_LED_SHIFT_SEL 0x0c
+#define BCM63138_FLASH_RATE_CTRL1 0x10
+#define BCM63138_FLASH_RATE_CTRL2 0x14
+#define BCM63138_FLASH_RATE_CTRL3 0x18
+#define BCM63138_FLASH_RATE_CTRL4 0x1c
+#define BCM63138_BRIGHT_CTRL1 0x20
+#define BCM63138_BRIGHT_CTRL2 0x24
+#define BCM63138_BRIGHT_CTRL3 0x28
+#define BCM63138_BRIGHT_CTRL4 0x2c
+#define BCM63138_POWER_LED_CFG 0x30
+#define BCM63138_HW_POLARITY 0xb4
+#define BCM63138_SW_DATA 0xb8
+#define BCM63138_SW_POLARITY 0xbc
+#define BCM63138_PARALLEL_LED_POLARITY 0xc0
+#define BCM63138_SERIAL_LED_POLARITY 0xc4
+#define BCM63138_HW_LED_STATUS 0xc8
+#define BCM63138_FLASH_CTRL_STATUS 0xcc
+#define BCM63138_FLASH_BRT_CTRL 0xd0
+#define BCM63138_FLASH_P_LED_OUT_STATUS 0xd4
+#define BCM63138_FLASH_S_LED_OUT_STATUS 0xd8
+
+struct bcm63138_leds {
+ struct device *dev;
+ void __iomem *base;
+ spinlock_t lock;
+};
+
+struct bcm63138_led {
+ struct bcm63138_leds *leds;
+ struct led_classdev cdev;
+ u32 pin;
+ bool active_low;
+};
+
+/*
+ * I/O access
+ */
+
+static void bcm63138_leds_write(struct bcm63138_leds *leds, unsigned int reg,
+ u32 data)
+{
+ writel(data, leds->base + reg);
+}
+
+static unsigned long bcm63138_leds_read(struct bcm63138_leds *leds,
+ unsigned int reg)
+{
+ return readl(leds->base + reg);
+}
+
+static void bcm63138_leds_update_bits(struct bcm63138_leds *leds,
+ unsigned int reg, u32 mask, u32 val)
+{
+ WARN_ON(val & ~mask);
+
+ bcm63138_leds_write(leds, reg, (bcm63138_leds_read(leds, reg) & ~mask) | (val & mask));
+}
+
+/*
+ * Helpers
+ */
+
+static void bcm63138_leds_set_flash_rate(struct bcm63138_leds *leds,
+ struct bcm63138_led *led,
+ u8 value)
+{
+ int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4;
+ int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS;
+
+ bcm63138_leds_update_bits(leds, BCM63138_FLASH_RATE_CTRL1 + reg_offset,
+ BCM63138_LED_MASK << shift, value << shift);
+}
+
+static void bcm63138_leds_set_bright(struct bcm63138_leds *leds,
+ struct bcm63138_led *led,
+ u8 value)
+{
+ int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4;
+ int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS;
+
+ bcm63138_leds_update_bits(leds, BCM63138_BRIGHT_CTRL1 + reg_offset,
+ BCM63138_LED_MASK << shift, value << shift);
+}
+
+static void bcm63138_leds_enable_led(struct bcm63138_leds *leds,
+ struct bcm63138_led *led,
+ enum led_brightness value)
+{
+ u32 bit = BIT(led->pin);
+
+ bcm63138_leds_update_bits(leds, BCM63138_SW_DATA, bit, value ? bit : 0);
+}
+
+/*
+ * API callbacks
+ */
+
+static void bcm63138_leds_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev);
+ struct bcm63138_leds *leds = led->leds;
+ unsigned long flags;
+
+ spin_lock_irqsave(&leds->lock, flags);
+
+ bcm63138_leds_enable_led(leds, led, value);
+ if (!value)
+ bcm63138_leds_set_flash_rate(leds, led, 0);
+ else
+ bcm63138_leds_set_bright(leds, led, value);
+
+ spin_unlock_irqrestore(&leds->lock, flags);
+}
+
+static int bcm63138_leds_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev);
+ struct bcm63138_leds *leds = led->leds;
+ unsigned long flags;
+ u8 value;
+
+ if (!*delay_on && !*delay_off) {
+ *delay_on = 640;
+ *delay_off = 640;
+ }
+
+ if (*delay_on != *delay_off) {
+ dev_dbg(led_cdev->dev, "Blinking at unequal delays is not supported\n");
+ return -EINVAL;
+ }
+
+ switch (*delay_on) {
+ case 1152 ... 1408: /* 1280 ms ± 10% */
+ value = 0x7;
+ break;
+ case 576 ... 704: /* 640 ms ± 10% */
+ value = 0x6;
+ break;
+ case 288 ... 352: /* 320 ms ± 10% */
+ value = 0x5;
+ break;
+ case 126 ... 154: /* 140 ms ± 10% */
+ value = 0x4;
+ break;
+ case 59 ... 72: /* 65 ms ± 10% */
+ value = 0x3;
+ break;
+ default:
+ dev_dbg(led_cdev->dev, "Blinking delay value %lu is unsupported\n",
+ *delay_on);
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&leds->lock, flags);
+
+ bcm63138_leds_enable_led(leds, led, BCM63138_MAX_BRIGHTNESS);
+ bcm63138_leds_set_flash_rate(leds, led, value);
+
+ spin_unlock_irqrestore(&leds->lock, flags);
+
+ return 0;
+}
+
+/*
+ * LED driver
+ */
+
+static void bcm63138_leds_create_led(struct bcm63138_leds *leds,
+ struct device_node *np)
+{
+ struct led_init_data init_data = {
+ .fwnode = of_fwnode_handle(np),
+ };
+ struct device *dev = leds->dev;
+ struct bcm63138_led *led;
+ struct pinctrl *pinctrl;
+ u32 bit;
+ int err;
+
+ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+ if (!led) {
+ dev_err(dev, "Failed to alloc LED\n");
+ return;
+ }
+
+ led->leds = leds;
+
+ if (of_property_read_u32(np, "reg", &led->pin)) {
+ dev_err(dev, "Missing \"reg\" property in %pOF\n", np);
+ goto err_free;
+ }
+
+ if (led->pin >= BCM63138_MAX_LEDS) {
+ dev_err(dev, "Invalid \"reg\" value %d\n", led->pin);
+ goto err_free;
+ }
+
+ led->active_low = of_property_read_bool(np, "active-low");
+
+ led->cdev.max_brightness = BCM63138_MAX_BRIGHTNESS;
+ led->cdev.brightness_set = bcm63138_leds_brightness_set;
+ led->cdev.blink_set = bcm63138_leds_blink_set;
+
+ err = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
+ if (err) {
+ dev_err(dev, "Failed to register LED %pOF: %d\n", np, err);
+ goto err_free;
+ }
+
+ pinctrl = devm_pinctrl_get_select_default(led->cdev.dev);
+ if (IS_ERR(pinctrl) && PTR_ERR(pinctrl) != -ENODEV) {
+ dev_warn(led->cdev.dev, "Failed to select %pOF pinctrl: %ld\n",
+ np, PTR_ERR(pinctrl));
+ }
+
+ bit = BIT(led->pin);
+ bcm63138_leds_update_bits(leds, BCM63138_PARALLEL_LED_POLARITY, bit,
+ led->active_low ? 0 : bit);
+ bcm63138_leds_update_bits(leds, BCM63138_HW_LED_EN, bit, 0);
+ bcm63138_leds_set_flash_rate(leds, led, 0);
+ bcm63138_leds_enable_led(leds, led, led->cdev.brightness);
+
+ return;
+
+err_free:
+ devm_kfree(dev, led);
+}
+
+static int bcm63138_leds_probe(struct platform_device *pdev)
+{
+ struct device_node *np = dev_of_node(&pdev->dev);
+ struct device *dev = &pdev->dev;
+ struct bcm63138_leds *leds;
+ struct device_node *child;
+
+ leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
+ if (!leds)
+ return -ENOMEM;
+
+ leds->dev = dev;
+
+ leds->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(leds->base))
+ return PTR_ERR(leds->base);
+
+ spin_lock_init(&leds->lock);
+
+ bcm63138_leds_write(leds, BCM63138_GLB_CTRL,
+ BCM63138_GLB_CTRL_SERIAL_LED_DATA_PPOL |
+ BCM63138_GLB_CTRL_SERIAL_LED_EN_POL);
+ bcm63138_leds_write(leds, BCM63138_HW_LED_EN, 0);
+ bcm63138_leds_write(leds, BCM63138_SERIAL_LED_POLARITY, 0);
+ bcm63138_leds_write(leds, BCM63138_PARALLEL_LED_POLARITY, 0);
+
+ for_each_available_child_of_node(np, child) {
+ bcm63138_leds_create_led(leds, child);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id bcm63138_leds_of_match_table[] = {
+ { .compatible = "brcm,bcm63138-leds", },
+ { },
+};
+
+static struct platform_driver bcm63138_leds_driver = {
+ .probe = bcm63138_leds_probe,
+ .driver = {
+ .name = "leds-bcm63xxx",
+ .of_match_table = bcm63138_leds_of_match_table,
+ },
+};
+
+module_platform_driver(bcm63138_leds_driver);
+
+MODULE_AUTHOR("Rafał Miłecki");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(of, bcm63138_leds_of_match_table);
diff --git a/drivers/leds/blink/leds-lgm-sso.c b/drivers/leds/blink/leds-lgm-sso.c
new file mode 100644
index 000000000..6f270c027
--- /dev/null
+++ b/drivers/leds/blink/leds-lgm-sso.c
@@ -0,0 +1,877 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel Lightning Mountain SoC LED Serial Shift Output Controller driver
+ *
+ * Copyright (c) 2020 Intel Corporation.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/sizes.h>
+#include <linux/uaccess.h>
+
+#define SSO_DEV_NAME "lgm-sso"
+
+#define LED_BLINK_H8_0 0x0
+#define LED_BLINK_H8_1 0x4
+#define GET_FREQ_OFFSET(pin, src) (((pin) * 6) + ((src) * 2))
+#define GET_SRC_OFFSET(pinc) (((pin) * 6) + 4)
+
+#define DUTY_CYCLE(x) (0x8 + ((x) * 4))
+#define SSO_CON0 0x2B0
+#define SSO_CON0_RZFL BIT(26)
+#define SSO_CON0_BLINK_R BIT(30)
+#define SSO_CON0_SWU BIT(31)
+
+#define SSO_CON1 0x2B4
+#define SSO_CON1_FCDSC GENMASK(21, 20) /* Fixed Divider Shift Clock */
+#define SSO_CON1_FPID GENMASK(24, 23)
+#define SSO_CON1_GPTD GENMASK(26, 25)
+#define SSO_CON1_US GENMASK(31, 30)
+
+#define SSO_CPU 0x2B8
+#define SSO_CON2 0x2C4
+#define SSO_CON3 0x2C8
+
+/* Driver MACRO */
+#define MAX_PIN_NUM_PER_BANK SZ_32
+#define MAX_GROUP_NUM SZ_4
+#define PINS_PER_GROUP SZ_8
+#define FPID_FREQ_RANK_MAX SZ_4
+#define SSO_LED_MAX_NUM SZ_32
+#define MAX_FREQ_RANK 10
+#define DEF_GPTC_CLK_RATE 200000000
+#define SSO_DEF_BRIGHTNESS LED_HALF
+#define DATA_CLK_EDGE 0 /* 0-rising, 1-falling */
+
+static const u32 freq_div_tbl[] = {4000, 2000, 1000, 800};
+static const int freq_tbl[] = {2, 4, 8, 10, 50000, 100000, 200000, 250000};
+static const int shift_clk_freq_tbl[] = {25000000, 12500000, 6250000, 3125000};
+
+/*
+ * Update Source to update the SOUTs
+ * SW - Software has to update the SWU bit
+ * GPTC - General Purpose timer is used as clock source
+ * FPID - Divided FSC clock (FPID) is used as clock source
+ */
+enum {
+ US_SW = 0,
+ US_GPTC = 1,
+ US_FPID = 2
+};
+
+enum {
+ MAX_FPID_FREQ_RANK = 5, /* 1 to 4 */
+ MAX_GPTC_FREQ_RANK = 9, /* 5 to 8 */
+ MAX_GPTC_HS_FREQ_RANK = 10, /* 9 to 10 */
+};
+
+enum {
+ LED_GRP0_PIN_MAX = 24,
+ LED_GRP1_PIN_MAX = 29,
+ LED_GRP2_PIN_MAX = 32,
+};
+
+enum {
+ LED_GRP0_0_23,
+ LED_GRP1_24_28,
+ LED_GRP2_29_31,
+ LED_GROUP_MAX,
+};
+
+enum {
+ CLK_SRC_FPID = 0,
+ CLK_SRC_GPTC = 1,
+ CLK_SRC_GPTC_HS = 2,
+};
+
+struct sso_led_priv;
+
+struct sso_led_desc {
+ const char *name;
+ const char *default_trigger;
+ unsigned int brightness;
+ unsigned int blink_rate;
+ unsigned int retain_state_suspended:1;
+ unsigned int retain_state_shutdown:1;
+ unsigned int panic_indicator:1;
+ unsigned int hw_blink:1;
+ unsigned int hw_trig:1;
+ unsigned int blinking:1;
+ int freq_idx;
+ u32 pin;
+};
+
+struct sso_led {
+ struct list_head list;
+ struct led_classdev cdev;
+ struct gpio_desc *gpiod;
+ struct sso_led_desc desc;
+ struct sso_led_priv *priv;
+};
+
+struct sso_gpio {
+ struct gpio_chip chip;
+ int shift_clk_freq;
+ int edge;
+ int freq;
+ u32 pins;
+ u32 alloc_bitmap;
+};
+
+struct sso_led_priv {
+ struct regmap *mmap;
+ struct device *dev;
+ struct platform_device *pdev;
+ struct clk_bulk_data clocks[2];
+ u32 fpid_clkrate;
+ u32 gptc_clkrate;
+ u32 freq[MAX_FREQ_RANK];
+ struct list_head led_list;
+ struct sso_gpio gpio;
+};
+
+static int sso_get_blink_rate_idx(struct sso_led_priv *priv, u32 rate)
+{
+ int i;
+
+ for (i = 0; i < MAX_FREQ_RANK; i++) {
+ if (rate <= priv->freq[i])
+ return i;
+ }
+
+ return -1;
+}
+
+static unsigned int sso_led_pin_to_group(u32 pin)
+{
+ if (pin < LED_GRP0_PIN_MAX)
+ return LED_GRP0_0_23;
+ else if (pin < LED_GRP1_PIN_MAX)
+ return LED_GRP1_24_28;
+ else
+ return LED_GRP2_29_31;
+}
+
+static u32 sso_led_get_freq_src(int freq_idx)
+{
+ if (freq_idx < MAX_FPID_FREQ_RANK)
+ return CLK_SRC_FPID;
+ else if (freq_idx < MAX_GPTC_FREQ_RANK)
+ return CLK_SRC_GPTC;
+ else
+ return CLK_SRC_GPTC_HS;
+}
+
+static u32 sso_led_pin_blink_off(u32 pin, unsigned int group)
+{
+ if (group == LED_GRP2_29_31)
+ return pin - LED_GRP1_PIN_MAX;
+ else if (group == LED_GRP1_24_28)
+ return pin - LED_GRP0_PIN_MAX;
+ else /* led 0 - 23 in led 32 location */
+ return SSO_LED_MAX_NUM - LED_GRP1_PIN_MAX;
+}
+
+static struct sso_led
+*cdev_to_sso_led_data(struct led_classdev *led_cdev)
+{
+ return container_of(led_cdev, struct sso_led, cdev);
+}
+
+static void sso_led_freq_set(struct sso_led_priv *priv, u32 pin, int freq_idx)
+{
+ u32 reg, off, freq_src, val_freq;
+ u32 low, high, val;
+ unsigned int group;
+
+ if (!freq_idx)
+ return;
+
+ group = sso_led_pin_to_group(pin);
+ freq_src = sso_led_get_freq_src(freq_idx);
+ off = sso_led_pin_blink_off(pin, group);
+
+ if (group == LED_GRP0_0_23)
+ return;
+ else if (group == LED_GRP1_24_28)
+ reg = LED_BLINK_H8_0;
+ else
+ reg = LED_BLINK_H8_1;
+
+ if (freq_src == CLK_SRC_FPID)
+ val_freq = freq_idx - 1;
+ else if (freq_src == CLK_SRC_GPTC)
+ val_freq = freq_idx - MAX_FPID_FREQ_RANK;
+
+ /* set blink rate idx */
+ if (freq_src != CLK_SRC_GPTC_HS) {
+ low = GET_FREQ_OFFSET(off, freq_src);
+ high = low + 2;
+ val = val_freq << high;
+ regmap_update_bits(priv->mmap, reg, GENMASK(high, low), val);
+ }
+
+ /* select clock source */
+ low = GET_SRC_OFFSET(off);
+ high = low + 2;
+ val = freq_src << high;
+ regmap_update_bits(priv->mmap, reg, GENMASK(high, low), val);
+}
+
+static void sso_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct sso_led_priv *priv;
+ struct sso_led_desc *desc;
+ struct sso_led *led;
+ int val;
+
+ led = cdev_to_sso_led_data(led_cdev);
+ priv = led->priv;
+ desc = &led->desc;
+
+ desc->brightness = brightness;
+ regmap_write(priv->mmap, DUTY_CYCLE(desc->pin), brightness);
+
+ if (brightness == LED_OFF)
+ val = 0;
+ else
+ val = 1;
+
+ /* HW blink off */
+ if (desc->hw_blink && !val && desc->blinking) {
+ desc->blinking = 0;
+ regmap_update_bits(priv->mmap, SSO_CON2, BIT(desc->pin), 0);
+ } else if (desc->hw_blink && val && !desc->blinking) {
+ desc->blinking = 1;
+ regmap_update_bits(priv->mmap, SSO_CON2, BIT(desc->pin),
+ 1 << desc->pin);
+ }
+
+ if (!desc->hw_trig)
+ gpiod_set_value(led->gpiod, val);
+}
+
+static enum led_brightness sso_led_brightness_get(struct led_classdev *led_cdev)
+{
+ struct sso_led *led = cdev_to_sso_led_data(led_cdev);
+
+ return (enum led_brightness)led->desc.brightness;
+}
+
+static int
+delay_to_freq_idx(struct sso_led *led, unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct sso_led_priv *priv = led->priv;
+ unsigned long delay;
+ int freq_idx;
+ u32 freq;
+
+ if (!*delay_on && !*delay_off) {
+ *delay_on = *delay_off = (1000 / priv->freq[0]) / 2;
+ return 0;
+ }
+
+ delay = *delay_on + *delay_off;
+ freq = 1000 / delay;
+
+ freq_idx = sso_get_blink_rate_idx(priv, freq);
+ if (freq_idx == -1)
+ freq_idx = MAX_FREQ_RANK - 1;
+
+ delay = 1000 / priv->freq[freq_idx];
+ *delay_on = *delay_off = delay / 2;
+
+ if (!*delay_on)
+ *delay_on = *delay_off = 1;
+
+ return freq_idx;
+}
+
+static int
+sso_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct sso_led_priv *priv;
+ struct sso_led *led;
+ int freq_idx;
+
+ led = cdev_to_sso_led_data(led_cdev);
+ priv = led->priv;
+ freq_idx = delay_to_freq_idx(led, delay_on, delay_off);
+
+ sso_led_freq_set(priv, led->desc.pin, freq_idx);
+ regmap_update_bits(priv->mmap, SSO_CON2, BIT(led->desc.pin),
+ 1 << led->desc.pin);
+ led->desc.freq_idx = freq_idx;
+ led->desc.blink_rate = priv->freq[freq_idx];
+ led->desc.blinking = 1;
+
+ return 1;
+}
+
+static void sso_led_hw_cfg(struct sso_led_priv *priv, struct sso_led *led)
+{
+ struct sso_led_desc *desc = &led->desc;
+
+ /* set freq */
+ if (desc->hw_blink) {
+ sso_led_freq_set(priv, desc->pin, desc->freq_idx);
+ regmap_update_bits(priv->mmap, SSO_CON2, BIT(desc->pin),
+ 1 << desc->pin);
+ }
+
+ if (desc->hw_trig)
+ regmap_update_bits(priv->mmap, SSO_CON3, BIT(desc->pin),
+ 1 << desc->pin);
+
+ /* set brightness */
+ regmap_write(priv->mmap, DUTY_CYCLE(desc->pin), desc->brightness);
+
+ /* enable output */
+ if (!desc->hw_trig && desc->brightness)
+ gpiod_set_value(led->gpiod, 1);
+}
+
+static int sso_create_led(struct sso_led_priv *priv, struct sso_led *led,
+ struct fwnode_handle *child)
+{
+ struct sso_led_desc *desc = &led->desc;
+ struct led_init_data init_data;
+ int err;
+
+ init_data.fwnode = child;
+ init_data.devicename = SSO_DEV_NAME;
+ init_data.default_label = ":";
+
+ led->cdev.default_trigger = desc->default_trigger;
+ led->cdev.brightness_set = sso_led_brightness_set;
+ led->cdev.brightness_get = sso_led_brightness_get;
+ led->cdev.brightness = desc->brightness;
+ led->cdev.max_brightness = LED_FULL;
+
+ if (desc->retain_state_shutdown)
+ led->cdev.flags |= LED_RETAIN_AT_SHUTDOWN;
+ if (desc->retain_state_suspended)
+ led->cdev.flags |= LED_CORE_SUSPENDRESUME;
+ if (desc->panic_indicator)
+ led->cdev.flags |= LED_PANIC_INDICATOR;
+
+ if (desc->hw_blink)
+ led->cdev.blink_set = sso_led_blink_set;
+
+ sso_led_hw_cfg(priv, led);
+
+ err = devm_led_classdev_register_ext(priv->dev, &led->cdev, &init_data);
+ if (err)
+ return err;
+
+ list_add(&led->list, &priv->led_list);
+
+ return 0;
+}
+
+static void sso_init_freq(struct sso_led_priv *priv)
+{
+ int i;
+
+ priv->freq[0] = 0;
+ for (i = 1; i < MAX_FREQ_RANK; i++) {
+ if (i < MAX_FPID_FREQ_RANK) {
+ priv->freq[i] = priv->fpid_clkrate / freq_div_tbl[i - 1];
+ } else if (i < MAX_GPTC_FREQ_RANK) {
+ priv->freq[i] = priv->gptc_clkrate /
+ freq_div_tbl[i - MAX_FPID_FREQ_RANK];
+ } else if (i < MAX_GPTC_HS_FREQ_RANK) {
+ priv->freq[i] = priv->gptc_clkrate;
+ }
+ }
+}
+
+static int sso_gpio_request(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sso_led_priv *priv = gpiochip_get_data(chip);
+
+ if (priv->gpio.alloc_bitmap & BIT(offset))
+ return -EINVAL;
+
+ priv->gpio.alloc_bitmap |= BIT(offset);
+ regmap_write(priv->mmap, DUTY_CYCLE(offset), 0xFF);
+
+ return 0;
+}
+
+static void sso_gpio_free(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sso_led_priv *priv = gpiochip_get_data(chip);
+
+ priv->gpio.alloc_bitmap &= ~BIT(offset);
+ regmap_write(priv->mmap, DUTY_CYCLE(offset), 0x0);
+}
+
+static int sso_gpio_get_dir(struct gpio_chip *chip, unsigned int offset)
+{
+ return GPIO_LINE_DIRECTION_OUT;
+}
+
+static int
+sso_gpio_dir_out(struct gpio_chip *chip, unsigned int offset, int value)
+{
+ struct sso_led_priv *priv = gpiochip_get_data(chip);
+ bool bit = !!value;
+
+ regmap_update_bits(priv->mmap, SSO_CPU, BIT(offset), bit << offset);
+ if (!priv->gpio.freq)
+ regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_SWU,
+ SSO_CON0_SWU);
+
+ return 0;
+}
+
+static int sso_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sso_led_priv *priv = gpiochip_get_data(chip);
+ u32 reg_val;
+
+ regmap_read(priv->mmap, SSO_CPU, &reg_val);
+
+ return !!(reg_val & BIT(offset));
+}
+
+static void sso_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
+{
+ struct sso_led_priv *priv = gpiochip_get_data(chip);
+
+ regmap_update_bits(priv->mmap, SSO_CPU, BIT(offset), value << offset);
+ if (!priv->gpio.freq)
+ regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_SWU,
+ SSO_CON0_SWU);
+}
+
+static int sso_gpio_gc_init(struct device *dev, struct sso_led_priv *priv)
+{
+ struct gpio_chip *gc = &priv->gpio.chip;
+
+ gc->request = sso_gpio_request;
+ gc->free = sso_gpio_free;
+ gc->get_direction = sso_gpio_get_dir;
+ gc->direction_output = sso_gpio_dir_out;
+ gc->get = sso_gpio_get;
+ gc->set = sso_gpio_set;
+
+ gc->label = "lgm-sso";
+ gc->base = -1;
+ /* To exclude pins from control, use "gpio-reserved-ranges" */
+ gc->ngpio = priv->gpio.pins;
+ gc->parent = dev;
+ gc->owner = THIS_MODULE;
+
+ return devm_gpiochip_add_data(dev, gc, priv);
+}
+
+static int sso_gpio_get_freq_idx(int freq)
+{
+ int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(freq_tbl); idx++) {
+ if (freq <= freq_tbl[idx])
+ return idx;
+ }
+
+ return -1;
+}
+
+static void sso_register_shift_clk(struct sso_led_priv *priv)
+{
+ int idx, size = ARRAY_SIZE(shift_clk_freq_tbl);
+ u32 val = 0;
+
+ for (idx = 0; idx < size; idx++) {
+ if (shift_clk_freq_tbl[idx] <= priv->gpio.shift_clk_freq) {
+ val = idx;
+ break;
+ }
+ }
+
+ if (idx == size)
+ dev_warn(priv->dev, "%s: Invalid freq %d\n",
+ __func__, priv->gpio.shift_clk_freq);
+
+ regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_FCDSC,
+ FIELD_PREP(SSO_CON1_FCDSC, val));
+}
+
+static int sso_gpio_freq_set(struct sso_led_priv *priv)
+{
+ int freq_idx;
+ u32 val;
+
+ freq_idx = sso_gpio_get_freq_idx(priv->gpio.freq);
+ if (freq_idx == -1)
+ freq_idx = ARRAY_SIZE(freq_tbl) - 1;
+
+ val = freq_idx % FPID_FREQ_RANK_MAX;
+
+ if (!priv->gpio.freq) {
+ regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_BLINK_R, 0);
+ regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_US,
+ FIELD_PREP(SSO_CON1_US, US_SW));
+ } else if (freq_idx < FPID_FREQ_RANK_MAX) {
+ regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_BLINK_R,
+ SSO_CON0_BLINK_R);
+ regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_US,
+ FIELD_PREP(SSO_CON1_US, US_FPID));
+ regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_FPID,
+ FIELD_PREP(SSO_CON1_FPID, val));
+ } else {
+ regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_BLINK_R,
+ SSO_CON0_BLINK_R);
+ regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_US,
+ FIELD_PREP(SSO_CON1_US, US_GPTC));
+ regmap_update_bits(priv->mmap, SSO_CON1, SSO_CON1_GPTD,
+ FIELD_PREP(SSO_CON1_GPTD, val));
+ }
+
+ return 0;
+}
+
+static int sso_gpio_hw_init(struct sso_led_priv *priv)
+{
+ u32 activate;
+ int i, err;
+
+ /* Clear all duty cycles */
+ for (i = 0; i < priv->gpio.pins; i++) {
+ err = regmap_write(priv->mmap, DUTY_CYCLE(i), 0);
+ if (err)
+ return err;
+ }
+
+ /* 4 groups for total 32 pins */
+ for (i = 1; i <= MAX_GROUP_NUM; i++) {
+ activate = !!(i * PINS_PER_GROUP <= priv->gpio.pins ||
+ priv->gpio.pins > (i - 1) * PINS_PER_GROUP);
+ err = regmap_update_bits(priv->mmap, SSO_CON1, BIT(i - 1),
+ activate << (i - 1));
+ if (err)
+ return err;
+ }
+
+ /* NO HW directly controlled pin by default */
+ err = regmap_write(priv->mmap, SSO_CON3, 0);
+ if (err)
+ return err;
+
+ /* NO BLINK for all pins */
+ err = regmap_write(priv->mmap, SSO_CON2, 0);
+ if (err)
+ return err;
+
+ /* OUTPUT 0 by default */
+ err = regmap_write(priv->mmap, SSO_CPU, 0);
+ if (err)
+ return err;
+
+ /* update edge */
+ err = regmap_update_bits(priv->mmap, SSO_CON0, SSO_CON0_RZFL,
+ FIELD_PREP(SSO_CON0_RZFL, priv->gpio.edge));
+ if (err)
+ return err;
+
+ /* Set GPIO update rate */
+ sso_gpio_freq_set(priv);
+
+ /* Register shift clock */
+ sso_register_shift_clk(priv);
+
+ return 0;
+}
+
+static void sso_led_shutdown(struct sso_led *led)
+{
+ struct sso_led_priv *priv = led->priv;
+
+ /* unregister led */
+ devm_led_classdev_unregister(priv->dev, &led->cdev);
+
+ /* clear HW control bit */
+ if (led->desc.hw_trig)
+ regmap_update_bits(priv->mmap, SSO_CON3, BIT(led->desc.pin), 0);
+
+ led->priv = NULL;
+}
+
+static int
+__sso_led_dt_parse(struct sso_led_priv *priv, struct fwnode_handle *fw_ssoled)
+{
+ struct fwnode_handle *fwnode_child;
+ struct device *dev = priv->dev;
+ struct sso_led_desc *desc;
+ struct sso_led *led;
+ const char *tmp;
+ u32 prop;
+ int ret;
+
+ fwnode_for_each_child_node(fw_ssoled, fwnode_child) {
+ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+ if (!led) {
+ ret = -ENOMEM;
+ goto __dt_err;
+ }
+
+ INIT_LIST_HEAD(&led->list);
+ led->priv = priv;
+ desc = &led->desc;
+
+ led->gpiod = devm_fwnode_get_gpiod_from_child(dev, NULL,
+ fwnode_child,
+ GPIOD_ASIS, NULL);
+ if (IS_ERR(led->gpiod)) {
+ ret = dev_err_probe(dev, PTR_ERR(led->gpiod), "led: get gpio fail!\n");
+ goto __dt_err;
+ }
+
+ fwnode_property_read_string(fwnode_child,
+ "linux,default-trigger",
+ &desc->default_trigger);
+
+ if (fwnode_property_present(fwnode_child,
+ "retain-state-suspended"))
+ desc->retain_state_suspended = 1;
+
+ if (fwnode_property_present(fwnode_child,
+ "retain-state-shutdown"))
+ desc->retain_state_shutdown = 1;
+
+ if (fwnode_property_present(fwnode_child, "panic-indicator"))
+ desc->panic_indicator = 1;
+
+ ret = fwnode_property_read_u32(fwnode_child, "reg", &prop);
+ if (ret)
+ goto __dt_err;
+ if (prop >= SSO_LED_MAX_NUM) {
+ dev_err(dev, "invalid LED pin:%u\n", prop);
+ ret = -EINVAL;
+ goto __dt_err;
+ }
+ desc->pin = prop;
+
+ if (fwnode_property_present(fwnode_child, "intel,sso-hw-blink"))
+ desc->hw_blink = 1;
+
+ desc->hw_trig = fwnode_property_read_bool(fwnode_child,
+ "intel,sso-hw-trigger");
+ if (desc->hw_trig) {
+ desc->default_trigger = NULL;
+ desc->retain_state_shutdown = 0;
+ desc->retain_state_suspended = 0;
+ desc->panic_indicator = 0;
+ desc->hw_blink = 0;
+ }
+
+ if (fwnode_property_read_u32(fwnode_child,
+ "intel,sso-blink-rate-hz", &prop)) {
+ /* default first freq rate */
+ desc->freq_idx = 0;
+ desc->blink_rate = priv->freq[desc->freq_idx];
+ } else {
+ desc->freq_idx = sso_get_blink_rate_idx(priv, prop);
+ if (desc->freq_idx == -1)
+ desc->freq_idx = MAX_FREQ_RANK - 1;
+
+ desc->blink_rate = priv->freq[desc->freq_idx];
+ }
+
+ if (!fwnode_property_read_string(fwnode_child, "default-state", &tmp)) {
+ if (!strcmp(tmp, "on"))
+ desc->brightness = LED_FULL;
+ }
+
+ ret = sso_create_led(priv, led, fwnode_child);
+ if (ret)
+ goto __dt_err;
+ }
+
+ return 0;
+
+__dt_err:
+ fwnode_handle_put(fwnode_child);
+ /* unregister leds */
+ list_for_each_entry(led, &priv->led_list, list)
+ sso_led_shutdown(led);
+
+ return ret;
+}
+
+static int sso_led_dt_parse(struct sso_led_priv *priv)
+{
+ struct fwnode_handle *fwnode = dev_fwnode(priv->dev);
+ struct fwnode_handle *fw_ssoled;
+ struct device *dev = priv->dev;
+ int count;
+ int ret;
+
+ count = device_get_child_node_count(dev);
+ if (!count)
+ return 0;
+
+ fw_ssoled = fwnode_get_named_child_node(fwnode, "ssoled");
+ if (fw_ssoled) {
+ ret = __sso_led_dt_parse(priv, fw_ssoled);
+ fwnode_handle_put(fw_ssoled);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int sso_probe_gpios(struct sso_led_priv *priv)
+{
+ struct device *dev = priv->dev;
+ int ret;
+
+ if (device_property_read_u32(dev, "ngpios", &priv->gpio.pins))
+ priv->gpio.pins = MAX_PIN_NUM_PER_BANK;
+
+ if (priv->gpio.pins > MAX_PIN_NUM_PER_BANK)
+ return -EINVAL;
+
+ if (device_property_read_u32(dev, "intel,sso-update-rate-hz",
+ &priv->gpio.freq))
+ priv->gpio.freq = 0;
+
+ priv->gpio.edge = DATA_CLK_EDGE;
+ priv->gpio.shift_clk_freq = -1;
+
+ ret = sso_gpio_hw_init(priv);
+ if (ret)
+ return ret;
+
+ return sso_gpio_gc_init(dev, priv);
+}
+
+static void sso_clock_disable_unprepare(void *data)
+{
+ struct sso_led_priv *priv = data;
+
+ clk_bulk_disable_unprepare(ARRAY_SIZE(priv->clocks), priv->clocks);
+}
+
+static int intel_sso_led_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct sso_led_priv *priv;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->pdev = pdev;
+ priv->dev = dev;
+
+ /* gate clock */
+ priv->clocks[0].id = "sso";
+
+ /* fpid clock */
+ priv->clocks[1].id = "fpid";
+
+ ret = devm_clk_bulk_get(dev, ARRAY_SIZE(priv->clocks), priv->clocks);
+ if (ret) {
+ dev_err(dev, "Getting clocks failed!\n");
+ return ret;
+ }
+
+ ret = clk_bulk_prepare_enable(ARRAY_SIZE(priv->clocks), priv->clocks);
+ if (ret) {
+ dev_err(dev, "Failed to prepare and enable clocks!\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(dev, sso_clock_disable_unprepare, priv);
+ if (ret)
+ return ret;
+
+ priv->fpid_clkrate = clk_get_rate(priv->clocks[1].clk);
+
+ priv->mmap = syscon_node_to_regmap(dev->of_node);
+
+ priv->mmap = syscon_node_to_regmap(dev->of_node);
+ if (IS_ERR(priv->mmap)) {
+ dev_err(dev, "Failed to map iomem!\n");
+ return PTR_ERR(priv->mmap);
+ }
+
+ ret = sso_probe_gpios(priv);
+ if (ret) {
+ regmap_exit(priv->mmap);
+ return ret;
+ }
+
+ INIT_LIST_HEAD(&priv->led_list);
+
+ platform_set_drvdata(pdev, priv);
+ sso_init_freq(priv);
+
+ priv->gptc_clkrate = DEF_GPTC_CLK_RATE;
+
+ ret = sso_led_dt_parse(priv);
+ if (ret) {
+ regmap_exit(priv->mmap);
+ return ret;
+ }
+ dev_info(priv->dev, "sso LED init success!\n");
+
+ return 0;
+}
+
+static int intel_sso_led_remove(struct platform_device *pdev)
+{
+ struct sso_led_priv *priv;
+ struct sso_led *led, *n;
+
+ priv = platform_get_drvdata(pdev);
+
+ list_for_each_entry_safe(led, n, &priv->led_list, list) {
+ list_del(&led->list);
+ sso_led_shutdown(led);
+ }
+
+ regmap_exit(priv->mmap);
+
+ return 0;
+}
+
+static const struct of_device_id of_sso_led_match[] = {
+ { .compatible = "intel,lgm-ssoled" },
+ {}
+};
+
+MODULE_DEVICE_TABLE(of, of_sso_led_match);
+
+static struct platform_driver intel_sso_led_driver = {
+ .probe = intel_sso_led_probe,
+ .remove = intel_sso_led_remove,
+ .driver = {
+ .name = "lgm-ssoled",
+ .of_match_table = of_sso_led_match,
+ },
+};
+
+module_platform_driver(intel_sso_led_driver);
+
+MODULE_DESCRIPTION("Intel SSO LED/GPIO driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/flash/Kconfig b/drivers/leds/flash/Kconfig
new file mode 100644
index 000000000..d3eb689b1
--- /dev/null
+++ b/drivers/leds/flash/Kconfig
@@ -0,0 +1,93 @@
+# SPDX-License-Identifier: GPL-2.0
+
+if LEDS_CLASS_FLASH
+
+config LEDS_AAT1290
+ tristate "LED support for the AAT1290"
+ depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+ depends on GPIOLIB || COMPILE_TEST
+ depends on OF
+ depends on PINCTRL
+ help
+ This option enables support for the LEDs on the AAT1290.
+
+config LEDS_AS3645A
+ tristate "AS3645A and LM3555 LED flash controllers support"
+ depends on I2C
+ depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+ help
+ Enable LED flash class support for AS3645A LED flash
+ controller. V4L2 flash API is provided as well if
+ CONFIG_V4L2_FLASH_API is enabled.
+
+config LEDS_KTD2692
+ tristate "LED support for Kinetic KTD2692 flash LED controller"
+ depends on OF
+ depends on GPIOLIB || COMPILE_TEST
+ help
+ This option enables support for Kinetic KTD2692 LED flash connected
+ through ExpressWire interface.
+
+ Say Y to enable this driver.
+
+config LEDS_LM3601X
+ tristate "LED support for LM3601x Chips"
+ depends on LEDS_CLASS && I2C
+ select REGMAP_I2C
+ help
+ This option enables support for the TI LM3601x family
+ of flash, torch and indicator classes.
+
+config LEDS_MAX77693
+ tristate "LED support for MAX77693 Flash"
+ depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+ depends on MFD_MAX77693
+ depends on OF
+ help
+ This option enables support for the flash part of the MAX77693
+ multifunction device. It has build in control for two leds in flash
+ and torch mode.
+
+config LEDS_MT6360
+ tristate "LED Support for Mediatek MT6360 PMIC"
+ depends on LEDS_CLASS && OF
+ depends on LEDS_CLASS_FLASH || !LEDS_CLASS_FLASH
+ depends on LEDS_CLASS_MULTICOLOR || !LEDS_CLASS_MULTICOLOR
+ depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+ depends on MFD_MT6360
+ help
+ This option enables support for dual Flash LED drivers found on
+ Mediatek MT6360 PMIC.
+ Independent current sources supply for each flash LED support torch
+ and strobe mode.
+
+config LEDS_RT4505
+ tristate "LED support for RT4505 flashlight controller"
+ depends on I2C && OF
+ depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+ select REGMAP_I2C
+ help
+ This option enables support for the RT4505 flash LED controller.
+ RT4505 includes torch and flash functions with programmable current.
+ And it's commonly used to compensate the illuminance for the camera
+ inside the mobile product like as phones or tablets.
+
+config LEDS_RT8515
+ tristate "LED support for Richtek RT8515 flash/torch LED"
+ depends on GPIOLIB
+ depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+ help
+ This option enables support for the Richtek RT8515 flash
+ and torch LEDs found on some mobile phones.
+
+ To compile this driver as a module, choose M here: the module
+ will be called leds-rt8515.
+
+config LEDS_SGM3140
+ tristate "LED support for the SGM3140"
+ depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+ help
+ This option enables support for the SGM3140 500mA Buck/Boost Charge
+ Pump LED Driver.
+
+endif # LEDS_CLASS_FLASH
diff --git a/drivers/leds/flash/Makefile b/drivers/leds/flash/Makefile
new file mode 100644
index 000000000..0acbddc0b
--- /dev/null
+++ b/drivers/leds/flash/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_LEDS_MT6360) += leds-mt6360.o
+obj-$(CONFIG_LEDS_AAT1290) += leds-aat1290.o
+obj-$(CONFIG_LEDS_AS3645A) += leds-as3645a.o
+obj-$(CONFIG_LEDS_KTD2692) += leds-ktd2692.o
+obj-$(CONFIG_LEDS_LM3601X) += leds-lm3601x.o
+obj-$(CONFIG_LEDS_MAX77693) += leds-max77693.o
+obj-$(CONFIG_LEDS_RT4505) += leds-rt4505.o
+obj-$(CONFIG_LEDS_RT8515) += leds-rt8515.o
+obj-$(CONFIG_LEDS_SGM3140) += leds-sgm3140.o
diff --git a/drivers/leds/flash/leds-aat1290.c b/drivers/leds/flash/leds-aat1290.c
new file mode 100644
index 000000000..589484b22
--- /dev/null
+++ b/drivers/leds/flash/leds-aat1290.c
@@ -0,0 +1,556 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Flash class driver for the AAT1290
+ * 1.5A Step-Up Current Regulator for Flash LEDs
+ *
+ * Copyright (C) 2015, Samsung Electronics Co., Ltd.
+ * Author: Jacek Anaszewski <j.anaszewski@samsung.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/led-class-flash.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <media/v4l2-flash-led-class.h>
+
+#define AAT1290_MOVIE_MODE_CURRENT_ADDR 17
+#define AAT1290_MAX_MM_CURR_PERCENT_0 16
+#define AAT1290_MAX_MM_CURR_PERCENT_100 1
+
+#define AAT1290_FLASH_SAFETY_TIMER_ADDR 18
+
+#define AAT1290_MOVIE_MODE_CONFIG_ADDR 19
+#define AAT1290_MOVIE_MODE_OFF 1
+#define AAT1290_MOVIE_MODE_ON 3
+
+#define AAT1290_MM_CURRENT_RATIO_ADDR 20
+#define AAT1290_MM_TO_FL_1_92 1
+
+#define AAT1290_MM_TO_FL_RATIO 1000 / 1920
+#define AAT1290_MAX_MM_CURRENT(fl_max) (fl_max * AAT1290_MM_TO_FL_RATIO)
+
+#define AAT1290_LATCH_TIME_MIN_US 500
+#define AAT1290_LATCH_TIME_MAX_US 1000
+#define AAT1290_EN_SET_TICK_TIME_US 1
+#define AAT1290_FLEN_OFF_DELAY_TIME_US 10
+#define AAT1290_FLASH_TM_NUM_LEVELS 16
+#define AAT1290_MM_CURRENT_SCALE_SIZE 15
+
+#define AAT1290_NAME "aat1290"
+
+
+struct aat1290_led_config_data {
+ /* maximum LED current in movie mode */
+ u32 max_mm_current;
+ /* maximum LED current in flash mode */
+ u32 max_flash_current;
+ /* maximum flash timeout */
+ u32 max_flash_tm;
+ /* external strobe capability */
+ bool has_external_strobe;
+ /* max LED brightness level */
+ enum led_brightness max_brightness;
+};
+
+struct aat1290_led {
+ /* platform device data */
+ struct platform_device *pdev;
+ /* secures access to the device */
+ struct mutex lock;
+
+ /* corresponding LED Flash class device */
+ struct led_classdev_flash fled_cdev;
+ /* V4L2 Flash device */
+ struct v4l2_flash *v4l2_flash;
+
+ /* FLEN pin */
+ struct gpio_desc *gpio_fl_en;
+ /* EN|SET pin */
+ struct gpio_desc *gpio_en_set;
+ /* movie mode current scale */
+ int *mm_current_scale;
+ /* device mode */
+ bool movie_mode;
+ /* brightness cache */
+ unsigned int torch_brightness;
+};
+
+static struct aat1290_led *fled_cdev_to_led(
+ struct led_classdev_flash *fled_cdev)
+{
+ return container_of(fled_cdev, struct aat1290_led, fled_cdev);
+}
+
+static struct led_classdev_flash *led_cdev_to_fled_cdev(
+ struct led_classdev *led_cdev)
+{
+ return container_of(led_cdev, struct led_classdev_flash, led_cdev);
+}
+
+static void aat1290_as2cwire_write(struct aat1290_led *led, int addr, int value)
+{
+ int i;
+
+ gpiod_direction_output(led->gpio_fl_en, 0);
+ gpiod_direction_output(led->gpio_en_set, 0);
+
+ udelay(AAT1290_FLEN_OFF_DELAY_TIME_US);
+
+ /* write address */
+ for (i = 0; i < addr; ++i) {
+ udelay(AAT1290_EN_SET_TICK_TIME_US);
+ gpiod_direction_output(led->gpio_en_set, 0);
+ udelay(AAT1290_EN_SET_TICK_TIME_US);
+ gpiod_direction_output(led->gpio_en_set, 1);
+ }
+
+ usleep_range(AAT1290_LATCH_TIME_MIN_US, AAT1290_LATCH_TIME_MAX_US);
+
+ /* write data */
+ for (i = 0; i < value; ++i) {
+ udelay(AAT1290_EN_SET_TICK_TIME_US);
+ gpiod_direction_output(led->gpio_en_set, 0);
+ udelay(AAT1290_EN_SET_TICK_TIME_US);
+ gpiod_direction_output(led->gpio_en_set, 1);
+ }
+
+ usleep_range(AAT1290_LATCH_TIME_MIN_US, AAT1290_LATCH_TIME_MAX_US);
+}
+
+static void aat1290_set_flash_safety_timer(struct aat1290_led *led,
+ unsigned int micro_sec)
+{
+ struct led_classdev_flash *fled_cdev = &led->fled_cdev;
+ struct led_flash_setting *flash_tm = &fled_cdev->timeout;
+ int flash_tm_reg = AAT1290_FLASH_TM_NUM_LEVELS -
+ (micro_sec / flash_tm->step) + 1;
+
+ aat1290_as2cwire_write(led, AAT1290_FLASH_SAFETY_TIMER_ADDR,
+ flash_tm_reg);
+}
+
+/* LED subsystem callbacks */
+
+static int aat1290_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_flash *fled_cdev = led_cdev_to_fled_cdev(led_cdev);
+ struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
+
+ mutex_lock(&led->lock);
+
+ if (brightness == 0) {
+ gpiod_direction_output(led->gpio_fl_en, 0);
+ gpiod_direction_output(led->gpio_en_set, 0);
+ led->movie_mode = false;
+ } else {
+ if (!led->movie_mode) {
+ aat1290_as2cwire_write(led,
+ AAT1290_MM_CURRENT_RATIO_ADDR,
+ AAT1290_MM_TO_FL_1_92);
+ led->movie_mode = true;
+ }
+
+ aat1290_as2cwire_write(led, AAT1290_MOVIE_MODE_CURRENT_ADDR,
+ AAT1290_MAX_MM_CURR_PERCENT_0 - brightness);
+ aat1290_as2cwire_write(led, AAT1290_MOVIE_MODE_CONFIG_ADDR,
+ AAT1290_MOVIE_MODE_ON);
+ }
+
+ mutex_unlock(&led->lock);
+
+ return 0;
+}
+
+static int aat1290_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
+ bool state)
+
+{
+ struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
+ struct led_classdev *led_cdev = &fled_cdev->led_cdev;
+ struct led_flash_setting *timeout = &fled_cdev->timeout;
+
+ mutex_lock(&led->lock);
+
+ if (state) {
+ aat1290_set_flash_safety_timer(led, timeout->val);
+ gpiod_direction_output(led->gpio_fl_en, 1);
+ } else {
+ gpiod_direction_output(led->gpio_fl_en, 0);
+ gpiod_direction_output(led->gpio_en_set, 0);
+ }
+
+ /*
+ * To reenter movie mode after a flash event the part must be cycled
+ * off and back on to reset the movie mode and reprogrammed via the
+ * AS2Cwire. Therefore the brightness and movie_mode properties needs
+ * to be updated here to reflect the actual state.
+ */
+ led_cdev->brightness = 0;
+ led->movie_mode = false;
+
+ mutex_unlock(&led->lock);
+
+ return 0;
+}
+
+static int aat1290_led_flash_timeout_set(struct led_classdev_flash *fled_cdev,
+ u32 timeout)
+{
+ /*
+ * Don't do anything - flash timeout is cached in the led-class-flash
+ * core and will be applied in the strobe_set op, as writing the
+ * safety timer register spuriously turns the torch mode on.
+ */
+
+ return 0;
+}
+
+static int aat1290_led_parse_dt(struct aat1290_led *led,
+ struct aat1290_led_config_data *cfg,
+ struct device_node **sub_node)
+{
+ struct device *dev = &led->pdev->dev;
+ struct device_node *child_node;
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+ struct pinctrl *pinctrl;
+#endif
+ int ret = 0;
+
+ led->gpio_fl_en = devm_gpiod_get(dev, "flen", GPIOD_ASIS);
+ if (IS_ERR(led->gpio_fl_en)) {
+ ret = PTR_ERR(led->gpio_fl_en);
+ dev_err(dev, "Unable to claim gpio \"flen\".\n");
+ return ret;
+ }
+
+ led->gpio_en_set = devm_gpiod_get(dev, "enset", GPIOD_ASIS);
+ if (IS_ERR(led->gpio_en_set)) {
+ ret = PTR_ERR(led->gpio_en_set);
+ dev_err(dev, "Unable to claim gpio \"enset\".\n");
+ return ret;
+ }
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+ pinctrl = devm_pinctrl_get_select_default(&led->pdev->dev);
+ if (IS_ERR(pinctrl)) {
+ cfg->has_external_strobe = false;
+ dev_info(dev,
+ "No support for external strobe detected.\n");
+ } else {
+ cfg->has_external_strobe = true;
+ }
+#endif
+
+ child_node = of_get_next_available_child(dev_of_node(dev), NULL);
+ if (!child_node) {
+ dev_err(dev, "No DT child node found for connected LED.\n");
+ return -EINVAL;
+ }
+
+ ret = of_property_read_u32(child_node, "led-max-microamp",
+ &cfg->max_mm_current);
+ /*
+ * led-max-microamp will default to 1/20 of flash-max-microamp
+ * in case it is missing.
+ */
+ if (ret < 0)
+ dev_warn(dev,
+ "led-max-microamp DT property missing\n");
+
+ ret = of_property_read_u32(child_node, "flash-max-microamp",
+ &cfg->max_flash_current);
+ if (ret < 0) {
+ dev_err(dev,
+ "flash-max-microamp DT property missing\n");
+ goto err_parse_dt;
+ }
+
+ ret = of_property_read_u32(child_node, "flash-max-timeout-us",
+ &cfg->max_flash_tm);
+ if (ret < 0) {
+ dev_err(dev,
+ "flash-max-timeout-us DT property missing\n");
+ goto err_parse_dt;
+ }
+
+ *sub_node = child_node;
+
+err_parse_dt:
+ of_node_put(child_node);
+
+ return ret;
+}
+
+static void aat1290_led_validate_mm_current(struct aat1290_led *led,
+ struct aat1290_led_config_data *cfg)
+{
+ int i, b = 0, e = AAT1290_MM_CURRENT_SCALE_SIZE;
+
+ while (e - b > 1) {
+ i = b + (e - b) / 2;
+ if (cfg->max_mm_current < led->mm_current_scale[i])
+ e = i;
+ else
+ b = i;
+ }
+
+ cfg->max_mm_current = led->mm_current_scale[b];
+ cfg->max_brightness = b + 1;
+}
+
+static int init_mm_current_scale(struct aat1290_led *led,
+ struct aat1290_led_config_data *cfg)
+{
+ static const int max_mm_current_percent[] = {
+ 20, 22, 25, 28, 32, 36, 40, 45, 50, 56,
+ 63, 71, 79, 89, 100
+ };
+ int i, max_mm_current =
+ AAT1290_MAX_MM_CURRENT(cfg->max_flash_current);
+
+ led->mm_current_scale = devm_kzalloc(&led->pdev->dev,
+ sizeof(max_mm_current_percent),
+ GFP_KERNEL);
+ if (!led->mm_current_scale)
+ return -ENOMEM;
+
+ for (i = 0; i < AAT1290_MM_CURRENT_SCALE_SIZE; ++i)
+ led->mm_current_scale[i] = max_mm_current *
+ max_mm_current_percent[i] / 100;
+
+ return 0;
+}
+
+static int aat1290_led_get_configuration(struct aat1290_led *led,
+ struct aat1290_led_config_data *cfg,
+ struct device_node **sub_node)
+{
+ int ret;
+
+ ret = aat1290_led_parse_dt(led, cfg, sub_node);
+ if (ret < 0)
+ return ret;
+ /*
+ * Init non-linear movie mode current scale basing
+ * on the max flash current from led configuration.
+ */
+ ret = init_mm_current_scale(led, cfg);
+ if (ret < 0)
+ return ret;
+
+ aat1290_led_validate_mm_current(led, cfg);
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+#else
+ devm_kfree(&led->pdev->dev, led->mm_current_scale);
+#endif
+
+ return 0;
+}
+
+static void aat1290_init_flash_timeout(struct aat1290_led *led,
+ struct aat1290_led_config_data *cfg)
+{
+ struct led_classdev_flash *fled_cdev = &led->fled_cdev;
+ struct led_flash_setting *setting;
+
+ /* Init flash timeout setting */
+ setting = &fled_cdev->timeout;
+ setting->min = cfg->max_flash_tm / AAT1290_FLASH_TM_NUM_LEVELS;
+ setting->max = cfg->max_flash_tm;
+ setting->step = setting->min;
+ setting->val = setting->max;
+}
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+static enum led_brightness aat1290_intensity_to_brightness(
+ struct v4l2_flash *v4l2_flash,
+ s32 intensity)
+{
+ struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+ struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
+ int i;
+
+ for (i = AAT1290_MM_CURRENT_SCALE_SIZE - 1; i >= 0; --i)
+ if (intensity >= led->mm_current_scale[i])
+ return i + 1;
+
+ return 1;
+}
+
+static s32 aat1290_brightness_to_intensity(struct v4l2_flash *v4l2_flash,
+ enum led_brightness brightness)
+{
+ struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+ struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
+
+ return led->mm_current_scale[brightness - 1];
+}
+
+static int aat1290_led_external_strobe_set(struct v4l2_flash *v4l2_flash,
+ bool enable)
+{
+ struct aat1290_led *led = fled_cdev_to_led(v4l2_flash->fled_cdev);
+ struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+ struct led_classdev *led_cdev = &fled_cdev->led_cdev;
+ struct pinctrl *pinctrl;
+
+ gpiod_direction_output(led->gpio_fl_en, 0);
+ gpiod_direction_output(led->gpio_en_set, 0);
+
+ led->movie_mode = false;
+ led_cdev->brightness = 0;
+
+ pinctrl = devm_pinctrl_get_select(&led->pdev->dev,
+ enable ? "isp" : "host");
+ if (IS_ERR(pinctrl)) {
+ dev_warn(&led->pdev->dev, "Unable to switch strobe source.\n");
+ return PTR_ERR(pinctrl);
+ }
+
+ return 0;
+}
+
+static void aat1290_init_v4l2_flash_config(struct aat1290_led *led,
+ struct aat1290_led_config_data *led_cfg,
+ struct v4l2_flash_config *v4l2_sd_cfg)
+{
+ struct led_classdev *led_cdev = &led->fled_cdev.led_cdev;
+ struct led_flash_setting *s;
+
+ strlcpy(v4l2_sd_cfg->dev_name, led_cdev->dev->kobj.name,
+ sizeof(v4l2_sd_cfg->dev_name));
+
+ s = &v4l2_sd_cfg->intensity;
+ s->min = led->mm_current_scale[0];
+ s->max = led_cfg->max_mm_current;
+ s->step = 1;
+ s->val = s->max;
+
+ v4l2_sd_cfg->has_external_strobe = led_cfg->has_external_strobe;
+}
+
+static const struct v4l2_flash_ops v4l2_flash_ops = {
+ .external_strobe_set = aat1290_led_external_strobe_set,
+ .intensity_to_led_brightness = aat1290_intensity_to_brightness,
+ .led_brightness_to_intensity = aat1290_brightness_to_intensity,
+};
+#else
+static inline void aat1290_init_v4l2_flash_config(struct aat1290_led *led,
+ struct aat1290_led_config_data *led_cfg,
+ struct v4l2_flash_config *v4l2_sd_cfg)
+{
+}
+static const struct v4l2_flash_ops v4l2_flash_ops;
+#endif
+
+static const struct led_flash_ops flash_ops = {
+ .strobe_set = aat1290_led_flash_strobe_set,
+ .timeout_set = aat1290_led_flash_timeout_set,
+};
+
+static int aat1290_led_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *sub_node = NULL;
+ struct aat1290_led *led;
+ struct led_classdev *led_cdev;
+ struct led_classdev_flash *fled_cdev;
+ struct led_init_data init_data = {};
+ struct aat1290_led_config_data led_cfg = {};
+ struct v4l2_flash_config v4l2_sd_cfg = {};
+ int ret;
+
+ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->pdev = pdev;
+ platform_set_drvdata(pdev, led);
+
+ fled_cdev = &led->fled_cdev;
+ fled_cdev->ops = &flash_ops;
+ led_cdev = &fled_cdev->led_cdev;
+
+ ret = aat1290_led_get_configuration(led, &led_cfg, &sub_node);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&led->lock);
+
+ /* Initialize LED Flash class device */
+ led_cdev->brightness_set_blocking = aat1290_led_brightness_set;
+ led_cdev->max_brightness = led_cfg.max_brightness;
+ led_cdev->flags |= LED_DEV_CAP_FLASH;
+
+ aat1290_init_flash_timeout(led, &led_cfg);
+
+ init_data.fwnode = of_fwnode_handle(sub_node);
+ init_data.devicename = AAT1290_NAME;
+
+ /* Register LED Flash class device */
+ ret = led_classdev_flash_register_ext(&pdev->dev, fled_cdev,
+ &init_data);
+ if (ret < 0)
+ goto err_flash_register;
+
+ aat1290_init_v4l2_flash_config(led, &led_cfg, &v4l2_sd_cfg);
+
+ /* Create V4L2 Flash subdev. */
+ led->v4l2_flash = v4l2_flash_init(dev, of_fwnode_handle(sub_node),
+ fled_cdev, &v4l2_flash_ops,
+ &v4l2_sd_cfg);
+ if (IS_ERR(led->v4l2_flash)) {
+ ret = PTR_ERR(led->v4l2_flash);
+ goto error_v4l2_flash_init;
+ }
+
+ return 0;
+
+error_v4l2_flash_init:
+ led_classdev_flash_unregister(fled_cdev);
+err_flash_register:
+ mutex_destroy(&led->lock);
+
+ return ret;
+}
+
+static int aat1290_led_remove(struct platform_device *pdev)
+{
+ struct aat1290_led *led = platform_get_drvdata(pdev);
+
+ v4l2_flash_release(led->v4l2_flash);
+ led_classdev_flash_unregister(&led->fled_cdev);
+
+ mutex_destroy(&led->lock);
+
+ return 0;
+}
+
+static const struct of_device_id aat1290_led_dt_match[] = {
+ { .compatible = "skyworks,aat1290" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, aat1290_led_dt_match);
+
+static struct platform_driver aat1290_led_driver = {
+ .probe = aat1290_led_probe,
+ .remove = aat1290_led_remove,
+ .driver = {
+ .name = "aat1290",
+ .of_match_table = aat1290_led_dt_match,
+ },
+};
+
+module_platform_driver(aat1290_led_driver);
+
+MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");
+MODULE_DESCRIPTION("Skyworks Current Regulator for Flash LEDs");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/flash/leds-as3645a.c b/drivers/leds/flash/leds-as3645a.c
new file mode 100644
index 000000000..bb2249771
--- /dev/null
+++ b/drivers/leds/flash/leds-as3645a.c
@@ -0,0 +1,772 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * drivers/leds/leds-as3645a.c - AS3645A and LM3555 flash controllers driver
+ *
+ * Copyright (C) 2008-2011 Nokia Corporation
+ * Copyright (c) 2011, 2017 Intel Corporation.
+ *
+ * Based on drivers/media/i2c/as3645a.c.
+ *
+ * Contact: Sakari Ailus <sakari.ailus@iki.fi>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/led-class-flash.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/property.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-flash-led-class.h>
+
+#define AS_TIMER_US_TO_CODE(t) (((t) / 1000 - 100) / 50)
+#define AS_TIMER_CODE_TO_US(c) ((50 * (c) + 100) * 1000)
+
+/* Register definitions */
+
+/* Read-only Design info register: Reset state: xxxx 0001 */
+#define AS_DESIGN_INFO_REG 0x00
+#define AS_DESIGN_INFO_FACTORY(x) (((x) >> 4))
+#define AS_DESIGN_INFO_MODEL(x) ((x) & 0x0f)
+
+/* Read-only Version control register: Reset state: 0000 0000
+ * for first engineering samples
+ */
+#define AS_VERSION_CONTROL_REG 0x01
+#define AS_VERSION_CONTROL_RFU(x) (((x) >> 4))
+#define AS_VERSION_CONTROL_VERSION(x) ((x) & 0x0f)
+
+/* Read / Write (Indicator and timer register): Reset state: 0000 1111 */
+#define AS_INDICATOR_AND_TIMER_REG 0x02
+#define AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT 0
+#define AS_INDICATOR_AND_TIMER_VREF_SHIFT 4
+#define AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT 6
+
+/* Read / Write (Current set register): Reset state: 0110 1001 */
+#define AS_CURRENT_SET_REG 0x03
+#define AS_CURRENT_ASSIST_LIGHT_SHIFT 0
+#define AS_CURRENT_LED_DET_ON (1 << 3)
+#define AS_CURRENT_FLASH_CURRENT_SHIFT 4
+
+/* Read / Write (Control register): Reset state: 1011 0100 */
+#define AS_CONTROL_REG 0x04
+#define AS_CONTROL_MODE_SETTING_SHIFT 0
+#define AS_CONTROL_STROBE_ON (1 << 2)
+#define AS_CONTROL_OUT_ON (1 << 3)
+#define AS_CONTROL_EXT_TORCH_ON (1 << 4)
+#define AS_CONTROL_STROBE_TYPE_EDGE (0 << 5)
+#define AS_CONTROL_STROBE_TYPE_LEVEL (1 << 5)
+#define AS_CONTROL_COIL_PEAK_SHIFT 6
+
+/* Read only (D3 is read / write) (Fault and info): Reset state: 0000 x000 */
+#define AS_FAULT_INFO_REG 0x05
+#define AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT (1 << 1)
+#define AS_FAULT_INFO_INDICATOR_LED (1 << 2)
+#define AS_FAULT_INFO_LED_AMOUNT (1 << 3)
+#define AS_FAULT_INFO_TIMEOUT (1 << 4)
+#define AS_FAULT_INFO_OVER_TEMPERATURE (1 << 5)
+#define AS_FAULT_INFO_SHORT_CIRCUIT (1 << 6)
+#define AS_FAULT_INFO_OVER_VOLTAGE (1 << 7)
+
+/* Boost register */
+#define AS_BOOST_REG 0x0d
+#define AS_BOOST_CURRENT_DISABLE (0 << 0)
+#define AS_BOOST_CURRENT_ENABLE (1 << 0)
+
+/* Password register is used to unlock boost register writing */
+#define AS_PASSWORD_REG 0x0f
+#define AS_PASSWORD_UNLOCK_VALUE 0x55
+
+#define AS_NAME "as3645a"
+#define AS_I2C_ADDR (0x60 >> 1) /* W:0x60, R:0x61 */
+
+#define AS_FLASH_TIMEOUT_MIN 100000 /* us */
+#define AS_FLASH_TIMEOUT_MAX 850000
+#define AS_FLASH_TIMEOUT_STEP 50000
+
+#define AS_FLASH_INTENSITY_MIN 200000 /* uA */
+#define AS_FLASH_INTENSITY_MAX_1LED 500000
+#define AS_FLASH_INTENSITY_MAX_2LEDS 400000
+#define AS_FLASH_INTENSITY_STEP 20000
+
+#define AS_TORCH_INTENSITY_MIN 20000 /* uA */
+#define AS_TORCH_INTENSITY_MAX 160000
+#define AS_TORCH_INTENSITY_STEP 20000
+
+#define AS_INDICATOR_INTENSITY_MIN 0 /* uA */
+#define AS_INDICATOR_INTENSITY_MAX 10000
+#define AS_INDICATOR_INTENSITY_STEP 2500
+
+#define AS_PEAK_mA_MAX 2000
+#define AS_PEAK_mA_TO_REG(a) \
+ ((min_t(u32, AS_PEAK_mA_MAX, a) - 1250) / 250)
+
+/* LED numbers for Devicetree */
+#define AS_LED_FLASH 0
+#define AS_LED_INDICATOR 1
+
+enum as_mode {
+ AS_MODE_EXT_TORCH = 0 << AS_CONTROL_MODE_SETTING_SHIFT,
+ AS_MODE_INDICATOR = 1 << AS_CONTROL_MODE_SETTING_SHIFT,
+ AS_MODE_ASSIST = 2 << AS_CONTROL_MODE_SETTING_SHIFT,
+ AS_MODE_FLASH = 3 << AS_CONTROL_MODE_SETTING_SHIFT,
+};
+
+struct as3645a_config {
+ u32 flash_timeout_us;
+ u32 flash_max_ua;
+ u32 assist_max_ua;
+ u32 indicator_max_ua;
+ u32 voltage_reference;
+ u32 peak;
+};
+
+struct as3645a {
+ struct i2c_client *client;
+
+ struct mutex mutex;
+
+ struct led_classdev_flash fled;
+ struct led_classdev iled_cdev;
+
+ struct v4l2_flash *vf;
+ struct v4l2_flash *vfind;
+
+ struct fwnode_handle *flash_node;
+ struct fwnode_handle *indicator_node;
+
+ struct as3645a_config cfg;
+
+ enum as_mode mode;
+ unsigned int timeout;
+ unsigned int flash_current;
+ unsigned int assist_current;
+ unsigned int indicator_current;
+ enum v4l2_flash_strobe_source strobe_source;
+};
+
+#define fled_to_as3645a(__fled) container_of(__fled, struct as3645a, fled)
+#define iled_cdev_to_as3645a(__iled_cdev) \
+ container_of(__iled_cdev, struct as3645a, iled_cdev)
+
+/* Return negative errno else zero on success */
+static int as3645a_write(struct as3645a *flash, u8 addr, u8 val)
+{
+ struct i2c_client *client = flash->client;
+ int rval;
+
+ rval = i2c_smbus_write_byte_data(client, addr, val);
+
+ dev_dbg(&client->dev, "Write Addr:%02X Val:%02X %s\n", addr, val,
+ rval < 0 ? "fail" : "ok");
+
+ return rval;
+}
+
+/* Return negative errno else a data byte received from the device. */
+static int as3645a_read(struct as3645a *flash, u8 addr)
+{
+ struct i2c_client *client = flash->client;
+ int rval;
+
+ rval = i2c_smbus_read_byte_data(client, addr);
+
+ dev_dbg(&client->dev, "Read Addr:%02X Val:%02X %s\n", addr, rval,
+ rval < 0 ? "fail" : "ok");
+
+ return rval;
+}
+
+/* -----------------------------------------------------------------------------
+ * Hardware configuration and trigger
+ */
+
+/**
+ * as3645a_set_current - Set flash configuration registers
+ * @flash: The flash
+ *
+ * Configure the hardware with flash, assist and indicator currents, as well as
+ * flash timeout.
+ *
+ * Return 0 on success, or a negative error code if an I2C communication error
+ * occurred.
+ */
+static int as3645a_set_current(struct as3645a *flash)
+{
+ u8 val;
+
+ val = (flash->flash_current << AS_CURRENT_FLASH_CURRENT_SHIFT)
+ | (flash->assist_current << AS_CURRENT_ASSIST_LIGHT_SHIFT)
+ | AS_CURRENT_LED_DET_ON;
+
+ return as3645a_write(flash, AS_CURRENT_SET_REG, val);
+}
+
+static int as3645a_set_timeout(struct as3645a *flash)
+{
+ u8 val;
+
+ val = flash->timeout << AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT;
+
+ val |= (flash->cfg.voltage_reference
+ << AS_INDICATOR_AND_TIMER_VREF_SHIFT)
+ | ((flash->indicator_current ? flash->indicator_current - 1 : 0)
+ << AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT);
+
+ return as3645a_write(flash, AS_INDICATOR_AND_TIMER_REG, val);
+}
+
+/**
+ * as3645a_set_control - Set flash control register
+ * @flash: The flash
+ * @mode: Desired output mode
+ * @on: Desired output state
+ *
+ * Configure the hardware with output mode and state.
+ *
+ * Return 0 on success, or a negative error code if an I2C communication error
+ * occurred.
+ */
+static int
+as3645a_set_control(struct as3645a *flash, enum as_mode mode, bool on)
+{
+ u8 reg;
+
+ /* Configure output parameters and operation mode. */
+ reg = (flash->cfg.peak << AS_CONTROL_COIL_PEAK_SHIFT)
+ | (on ? AS_CONTROL_OUT_ON : 0)
+ | mode;
+
+ if (mode == AS_MODE_FLASH &&
+ flash->strobe_source == V4L2_FLASH_STROBE_SOURCE_EXTERNAL)
+ reg |= AS_CONTROL_STROBE_TYPE_LEVEL
+ | AS_CONTROL_STROBE_ON;
+
+ return as3645a_write(flash, AS_CONTROL_REG, reg);
+}
+
+static int as3645a_get_fault(struct led_classdev_flash *fled, u32 *fault)
+{
+ struct as3645a *flash = fled_to_as3645a(fled);
+ int rval;
+
+ /* NOTE: reading register clears fault status */
+ rval = as3645a_read(flash, AS_FAULT_INFO_REG);
+ if (rval < 0)
+ return rval;
+
+ if (rval & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT)
+ *fault |= LED_FAULT_OVER_CURRENT;
+
+ if (rval & AS_FAULT_INFO_INDICATOR_LED)
+ *fault |= LED_FAULT_INDICATOR;
+
+ dev_dbg(&flash->client->dev, "%u connected LEDs\n",
+ rval & AS_FAULT_INFO_LED_AMOUNT ? 2 : 1);
+
+ if (rval & AS_FAULT_INFO_TIMEOUT)
+ *fault |= LED_FAULT_TIMEOUT;
+
+ if (rval & AS_FAULT_INFO_OVER_TEMPERATURE)
+ *fault |= LED_FAULT_OVER_TEMPERATURE;
+
+ if (rval & AS_FAULT_INFO_SHORT_CIRCUIT)
+ *fault |= LED_FAULT_OVER_CURRENT;
+
+ if (rval & AS_FAULT_INFO_OVER_VOLTAGE)
+ *fault |= LED_FAULT_INPUT_VOLTAGE;
+
+ return rval;
+}
+
+static unsigned int __as3645a_current_to_reg(unsigned int min, unsigned int max,
+ unsigned int step,
+ unsigned int val)
+{
+ if (val < min)
+ val = min;
+
+ if (val > max)
+ val = max;
+
+ return (val - min) / step;
+}
+
+static unsigned int as3645a_current_to_reg(struct as3645a *flash, bool is_flash,
+ unsigned int ua)
+{
+ if (is_flash)
+ return __as3645a_current_to_reg(AS_TORCH_INTENSITY_MIN,
+ flash->cfg.assist_max_ua,
+ AS_TORCH_INTENSITY_STEP, ua);
+ else
+ return __as3645a_current_to_reg(AS_FLASH_INTENSITY_MIN,
+ flash->cfg.flash_max_ua,
+ AS_FLASH_INTENSITY_STEP, ua);
+}
+
+static int as3645a_set_indicator_brightness(struct led_classdev *iled_cdev,
+ enum led_brightness brightness)
+{
+ struct as3645a *flash = iled_cdev_to_as3645a(iled_cdev);
+ int rval;
+
+ flash->indicator_current = brightness;
+
+ rval = as3645a_set_timeout(flash);
+ if (rval)
+ return rval;
+
+ return as3645a_set_control(flash, AS_MODE_INDICATOR, brightness);
+}
+
+static int as3645a_set_assist_brightness(struct led_classdev *fled_cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_flash *fled = lcdev_to_flcdev(fled_cdev);
+ struct as3645a *flash = fled_to_as3645a(fled);
+ int rval;
+
+ if (brightness) {
+ /* Register value 0 is 20 mA. */
+ flash->assist_current = brightness - 1;
+
+ rval = as3645a_set_current(flash);
+ if (rval)
+ return rval;
+ }
+
+ return as3645a_set_control(flash, AS_MODE_ASSIST, brightness);
+}
+
+static int as3645a_set_flash_brightness(struct led_classdev_flash *fled,
+ u32 brightness_ua)
+{
+ struct as3645a *flash = fled_to_as3645a(fled);
+
+ flash->flash_current = as3645a_current_to_reg(flash, true,
+ brightness_ua);
+
+ return as3645a_set_current(flash);
+}
+
+static int as3645a_set_flash_timeout(struct led_classdev_flash *fled,
+ u32 timeout_us)
+{
+ struct as3645a *flash = fled_to_as3645a(fled);
+
+ flash->timeout = AS_TIMER_US_TO_CODE(timeout_us);
+
+ return as3645a_set_timeout(flash);
+}
+
+static int as3645a_set_strobe(struct led_classdev_flash *fled, bool state)
+{
+ struct as3645a *flash = fled_to_as3645a(fled);
+
+ return as3645a_set_control(flash, AS_MODE_FLASH, state);
+}
+
+static const struct led_flash_ops as3645a_led_flash_ops = {
+ .flash_brightness_set = as3645a_set_flash_brightness,
+ .timeout_set = as3645a_set_flash_timeout,
+ .strobe_set = as3645a_set_strobe,
+ .fault_get = as3645a_get_fault,
+};
+
+static int as3645a_setup(struct as3645a *flash)
+{
+ struct device *dev = &flash->client->dev;
+ u32 fault = 0;
+ int rval;
+
+ /* clear errors */
+ rval = as3645a_read(flash, AS_FAULT_INFO_REG);
+ if (rval < 0)
+ return rval;
+
+ dev_dbg(dev, "Fault info: %02x\n", rval);
+
+ rval = as3645a_set_current(flash);
+ if (rval < 0)
+ return rval;
+
+ rval = as3645a_set_timeout(flash);
+ if (rval < 0)
+ return rval;
+
+ rval = as3645a_set_control(flash, AS_MODE_INDICATOR, false);
+ if (rval < 0)
+ return rval;
+
+ /* read status */
+ rval = as3645a_get_fault(&flash->fled, &fault);
+ if (rval < 0)
+ return rval;
+
+ dev_dbg(dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n",
+ as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG));
+ dev_dbg(dev, "AS_CURRENT_SET_REG: %02x\n",
+ as3645a_read(flash, AS_CURRENT_SET_REG));
+ dev_dbg(dev, "AS_CONTROL_REG: %02x\n",
+ as3645a_read(flash, AS_CONTROL_REG));
+
+ return rval & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0;
+}
+
+static int as3645a_detect(struct as3645a *flash)
+{
+ struct device *dev = &flash->client->dev;
+ int rval, man, model, rfu, version;
+ const char *vendor;
+
+ rval = as3645a_read(flash, AS_DESIGN_INFO_REG);
+ if (rval < 0) {
+ dev_err(dev, "can't read design info reg\n");
+ return rval;
+ }
+
+ man = AS_DESIGN_INFO_FACTORY(rval);
+ model = AS_DESIGN_INFO_MODEL(rval);
+
+ rval = as3645a_read(flash, AS_VERSION_CONTROL_REG);
+ if (rval < 0) {
+ dev_err(dev, "can't read version control reg\n");
+ return rval;
+ }
+
+ rfu = AS_VERSION_CONTROL_RFU(rval);
+ version = AS_VERSION_CONTROL_VERSION(rval);
+
+ /* Verify the chip model and version. */
+ if (model != 0x01 || rfu != 0x00) {
+ dev_err(dev, "AS3645A not detected (model %d rfu %d)\n",
+ model, rfu);
+ return -ENODEV;
+ }
+
+ switch (man) {
+ case 1:
+ vendor = "AMS, Austria Micro Systems";
+ break;
+ case 2:
+ vendor = "ADI, Analog Devices Inc.";
+ break;
+ case 3:
+ vendor = "NSC, National Semiconductor";
+ break;
+ case 4:
+ vendor = "NXP";
+ break;
+ case 5:
+ vendor = "TI, Texas Instrument";
+ break;
+ default:
+ vendor = "Unknown";
+ }
+
+ dev_info(dev, "Chip vendor: %s (%d) Version: %d\n", vendor,
+ man, version);
+
+ rval = as3645a_write(flash, AS_PASSWORD_REG, AS_PASSWORD_UNLOCK_VALUE);
+ if (rval < 0)
+ return rval;
+
+ return as3645a_write(flash, AS_BOOST_REG, AS_BOOST_CURRENT_DISABLE);
+}
+
+static int as3645a_parse_node(struct as3645a *flash,
+ struct fwnode_handle *fwnode)
+{
+ struct as3645a_config *cfg = &flash->cfg;
+ struct fwnode_handle *child;
+ int rval;
+
+ fwnode_for_each_child_node(fwnode, child) {
+ u32 id = 0;
+
+ fwnode_property_read_u32(child, "reg", &id);
+
+ switch (id) {
+ case AS_LED_FLASH:
+ flash->flash_node = child;
+ fwnode_handle_get(child);
+ break;
+ case AS_LED_INDICATOR:
+ flash->indicator_node = child;
+ fwnode_handle_get(child);
+ break;
+ default:
+ dev_warn(&flash->client->dev,
+ "unknown LED %u encountered, ignoring\n", id);
+ break;
+ }
+ }
+
+ if (!flash->flash_node) {
+ dev_err(&flash->client->dev, "can't find flash node\n");
+ return -ENODEV;
+ }
+
+ rval = fwnode_property_read_u32(flash->flash_node, "flash-timeout-us",
+ &cfg->flash_timeout_us);
+ if (rval < 0) {
+ dev_err(&flash->client->dev,
+ "can't read flash-timeout-us property for flash\n");
+ goto out_err;
+ }
+
+ rval = fwnode_property_read_u32(flash->flash_node, "flash-max-microamp",
+ &cfg->flash_max_ua);
+ if (rval < 0) {
+ dev_err(&flash->client->dev,
+ "can't read flash-max-microamp property for flash\n");
+ goto out_err;
+ }
+
+ rval = fwnode_property_read_u32(flash->flash_node, "led-max-microamp",
+ &cfg->assist_max_ua);
+ if (rval < 0) {
+ dev_err(&flash->client->dev,
+ "can't read led-max-microamp property for flash\n");
+ goto out_err;
+ }
+
+ fwnode_property_read_u32(flash->flash_node, "voltage-reference",
+ &cfg->voltage_reference);
+
+ fwnode_property_read_u32(flash->flash_node, "ams,input-max-microamp",
+ &cfg->peak);
+ cfg->peak = AS_PEAK_mA_TO_REG(cfg->peak);
+
+ if (!flash->indicator_node) {
+ dev_warn(&flash->client->dev,
+ "can't find indicator node\n");
+ rval = -ENODEV;
+ goto out_err;
+ }
+
+
+ rval = fwnode_property_read_u32(flash->indicator_node,
+ "led-max-microamp",
+ &cfg->indicator_max_ua);
+ if (rval < 0) {
+ dev_err(&flash->client->dev,
+ "can't read led-max-microamp property for indicator\n");
+ goto out_err;
+ }
+
+ return 0;
+
+out_err:
+ fwnode_handle_put(flash->flash_node);
+ fwnode_handle_put(flash->indicator_node);
+
+ return rval;
+}
+
+static int as3645a_led_class_setup(struct as3645a *flash)
+{
+ struct led_classdev *fled_cdev = &flash->fled.led_cdev;
+ struct led_classdev *iled_cdev = &flash->iled_cdev;
+ struct led_init_data init_data = {};
+ struct led_flash_setting *cfg;
+ int rval;
+
+ iled_cdev->brightness_set_blocking = as3645a_set_indicator_brightness;
+ iled_cdev->max_brightness =
+ flash->cfg.indicator_max_ua / AS_INDICATOR_INTENSITY_STEP;
+ iled_cdev->flags = LED_CORE_SUSPENDRESUME;
+
+ init_data.fwnode = flash->indicator_node;
+ init_data.devicename = AS_NAME;
+ init_data.default_label = "indicator";
+
+ rval = led_classdev_register_ext(&flash->client->dev, iled_cdev,
+ &init_data);
+ if (rval < 0)
+ return rval;
+
+ cfg = &flash->fled.brightness;
+ cfg->min = AS_FLASH_INTENSITY_MIN;
+ cfg->max = flash->cfg.flash_max_ua;
+ cfg->step = AS_FLASH_INTENSITY_STEP;
+ cfg->val = flash->cfg.flash_max_ua;
+
+ cfg = &flash->fled.timeout;
+ cfg->min = AS_FLASH_TIMEOUT_MIN;
+ cfg->max = flash->cfg.flash_timeout_us;
+ cfg->step = AS_FLASH_TIMEOUT_STEP;
+ cfg->val = flash->cfg.flash_timeout_us;
+
+ flash->fled.ops = &as3645a_led_flash_ops;
+
+ fled_cdev->brightness_set_blocking = as3645a_set_assist_brightness;
+ /* Value 0 is off in LED class. */
+ fled_cdev->max_brightness =
+ as3645a_current_to_reg(flash, false,
+ flash->cfg.assist_max_ua) + 1;
+ fled_cdev->flags = LED_DEV_CAP_FLASH | LED_CORE_SUSPENDRESUME;
+
+ init_data.fwnode = flash->flash_node;
+ init_data.devicename = AS_NAME;
+ init_data.default_label = "flash";
+
+ rval = led_classdev_flash_register_ext(&flash->client->dev,
+ &flash->fled, &init_data);
+ if (rval)
+ goto out_err;
+
+ return rval;
+
+out_err:
+ led_classdev_unregister(iled_cdev);
+ dev_err(&flash->client->dev,
+ "led_classdev_flash_register() failed, error %d\n",
+ rval);
+ return rval;
+}
+
+static int as3645a_v4l2_setup(struct as3645a *flash)
+{
+ struct led_classdev_flash *fled = &flash->fled;
+ struct led_classdev *led = &fled->led_cdev;
+ struct v4l2_flash_config cfg = {
+ .intensity = {
+ .min = AS_TORCH_INTENSITY_MIN,
+ .max = flash->cfg.assist_max_ua,
+ .step = AS_TORCH_INTENSITY_STEP,
+ .val = flash->cfg.assist_max_ua,
+ },
+ };
+ struct v4l2_flash_config cfgind = {
+ .intensity = {
+ .min = AS_INDICATOR_INTENSITY_MIN,
+ .max = flash->cfg.indicator_max_ua,
+ .step = AS_INDICATOR_INTENSITY_STEP,
+ .val = flash->cfg.indicator_max_ua,
+ },
+ };
+
+ strlcpy(cfg.dev_name, led->dev->kobj.name, sizeof(cfg.dev_name));
+ strlcpy(cfgind.dev_name, flash->iled_cdev.dev->kobj.name,
+ sizeof(cfgind.dev_name));
+
+ flash->vf = v4l2_flash_init(
+ &flash->client->dev, flash->flash_node, &flash->fled, NULL,
+ &cfg);
+ if (IS_ERR(flash->vf))
+ return PTR_ERR(flash->vf);
+
+ flash->vfind = v4l2_flash_indicator_init(
+ &flash->client->dev, flash->indicator_node, &flash->iled_cdev,
+ &cfgind);
+ if (IS_ERR(flash->vfind)) {
+ v4l2_flash_release(flash->vf);
+ return PTR_ERR(flash->vfind);
+ }
+
+ return 0;
+}
+
+static int as3645a_probe(struct i2c_client *client)
+{
+ struct as3645a *flash;
+ int rval;
+
+ if (!dev_fwnode(&client->dev))
+ return -ENODEV;
+
+ flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
+ if (flash == NULL)
+ return -ENOMEM;
+
+ flash->client = client;
+
+ rval = as3645a_parse_node(flash, dev_fwnode(&client->dev));
+ if (rval < 0)
+ return rval;
+
+ rval = as3645a_detect(flash);
+ if (rval < 0)
+ goto out_put_nodes;
+
+ mutex_init(&flash->mutex);
+ i2c_set_clientdata(client, flash);
+
+ rval = as3645a_setup(flash);
+ if (rval)
+ goto out_mutex_destroy;
+
+ rval = as3645a_led_class_setup(flash);
+ if (rval)
+ goto out_mutex_destroy;
+
+ rval = as3645a_v4l2_setup(flash);
+ if (rval)
+ goto out_led_classdev_flash_unregister;
+
+ return 0;
+
+out_led_classdev_flash_unregister:
+ led_classdev_flash_unregister(&flash->fled);
+
+out_mutex_destroy:
+ mutex_destroy(&flash->mutex);
+
+out_put_nodes:
+ fwnode_handle_put(flash->flash_node);
+ fwnode_handle_put(flash->indicator_node);
+
+ return rval;
+}
+
+static void as3645a_remove(struct i2c_client *client)
+{
+ struct as3645a *flash = i2c_get_clientdata(client);
+
+ as3645a_set_control(flash, AS_MODE_EXT_TORCH, false);
+
+ v4l2_flash_release(flash->vf);
+ v4l2_flash_release(flash->vfind);
+
+ led_classdev_flash_unregister(&flash->fled);
+ led_classdev_unregister(&flash->iled_cdev);
+
+ mutex_destroy(&flash->mutex);
+
+ fwnode_handle_put(flash->flash_node);
+ fwnode_handle_put(flash->indicator_node);
+}
+
+static const struct i2c_device_id as3645a_id_table[] = {
+ { AS_NAME, 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, as3645a_id_table);
+
+static const struct of_device_id as3645a_of_table[] = {
+ { .compatible = "ams,as3645a" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, as3645a_of_table);
+
+static struct i2c_driver as3645a_i2c_driver = {
+ .driver = {
+ .of_match_table = as3645a_of_table,
+ .name = AS_NAME,
+ },
+ .probe_new = as3645a_probe,
+ .remove = as3645a_remove,
+ .id_table = as3645a_id_table,
+};
+
+module_i2c_driver(as3645a_i2c_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_AUTHOR("Sakari Ailus <sakari.ailus@iki.fi>");
+MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/flash/leds-ktd2692.c b/drivers/leds/flash/leds-ktd2692.c
new file mode 100644
index 000000000..670f3bf2e
--- /dev/null
+++ b/drivers/leds/flash/leds-ktd2692.c
@@ -0,0 +1,419 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED driver : leds-ktd2692.c
+ *
+ * Copyright (C) 2015 Samsung Electronics
+ * Ingi Kim <ingi2.kim@samsung.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/led-class-flash.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+
+/* Value related the movie mode */
+#define KTD2692_MOVIE_MODE_CURRENT_LEVELS 16
+#define KTD2692_MM_TO_FL_RATIO(x) ((x) / 3)
+#define KTD2692_MM_MIN_CURR_THRESHOLD_SCALE 8
+
+/* Value related the flash mode */
+#define KTD2692_FLASH_MODE_TIMEOUT_LEVELS 8
+#define KTD2692_FLASH_MODE_TIMEOUT_DISABLE 0
+#define KTD2692_FLASH_MODE_CURR_PERCENT(x) (((x) * 16) / 100)
+
+/* Macro for getting offset of flash timeout */
+#define GET_TIMEOUT_OFFSET(timeout, step) ((timeout) / (step))
+
+/* Base register address */
+#define KTD2692_REG_LVP_BASE 0x00
+#define KTD2692_REG_FLASH_TIMEOUT_BASE 0x20
+#define KTD2692_REG_MM_MIN_CURR_THRESHOLD_BASE 0x40
+#define KTD2692_REG_MOVIE_CURRENT_BASE 0x60
+#define KTD2692_REG_FLASH_CURRENT_BASE 0x80
+#define KTD2692_REG_MODE_BASE 0xA0
+
+/* Set bit coding time for expresswire interface */
+#define KTD2692_TIME_RESET_US 700
+#define KTD2692_TIME_DATA_START_TIME_US 10
+#define KTD2692_TIME_HIGH_END_OF_DATA_US 350
+#define KTD2692_TIME_LOW_END_OF_DATA_US 10
+#define KTD2692_TIME_SHORT_BITSET_US 4
+#define KTD2692_TIME_LONG_BITSET_US 12
+
+/* KTD2692 default length of name */
+#define KTD2692_NAME_LENGTH 20
+
+enum ktd2692_bitset {
+ KTD2692_LOW = 0,
+ KTD2692_HIGH,
+};
+
+/* Movie / Flash Mode Control */
+enum ktd2692_led_mode {
+ KTD2692_MODE_DISABLE = 0, /* default */
+ KTD2692_MODE_MOVIE,
+ KTD2692_MODE_FLASH,
+};
+
+struct ktd2692_led_config_data {
+ /* maximum LED current in movie mode */
+ u32 movie_max_microamp;
+ /* maximum LED current in flash mode */
+ u32 flash_max_microamp;
+ /* maximum flash timeout */
+ u32 flash_max_timeout;
+ /* max LED brightness level */
+ enum led_brightness max_brightness;
+};
+
+struct ktd2692_context {
+ /* Related LED Flash class device */
+ struct led_classdev_flash fled_cdev;
+
+ /* secures access to the device */
+ struct mutex lock;
+ struct regulator *regulator;
+
+ struct gpio_desc *aux_gpio;
+ struct gpio_desc *ctrl_gpio;
+
+ enum ktd2692_led_mode mode;
+ enum led_brightness torch_brightness;
+};
+
+static struct ktd2692_context *fled_cdev_to_led(
+ struct led_classdev_flash *fled_cdev)
+{
+ return container_of(fled_cdev, struct ktd2692_context, fled_cdev);
+}
+
+static void ktd2692_expresswire_start(struct ktd2692_context *led)
+{
+ gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
+ udelay(KTD2692_TIME_DATA_START_TIME_US);
+}
+
+static void ktd2692_expresswire_reset(struct ktd2692_context *led)
+{
+ gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
+ udelay(KTD2692_TIME_RESET_US);
+}
+
+static void ktd2692_expresswire_end(struct ktd2692_context *led)
+{
+ gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
+ udelay(KTD2692_TIME_LOW_END_OF_DATA_US);
+ gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
+ udelay(KTD2692_TIME_HIGH_END_OF_DATA_US);
+}
+
+static void ktd2692_expresswire_set_bit(struct ktd2692_context *led, bool bit)
+{
+ /*
+ * The Low Bit(0) and High Bit(1) is based on a time detection
+ * algorithm between time low and time high
+ * Time_(L_LB) : Low time of the Low Bit(0)
+ * Time_(H_LB) : High time of the LOW Bit(0)
+ * Time_(L_HB) : Low time of the High Bit(1)
+ * Time_(H_HB) : High time of the High Bit(1)
+ *
+ * It can be simplified to:
+ * Low Bit(0) : 2 * Time_(H_LB) < Time_(L_LB)
+ * High Bit(1) : 2 * Time_(L_HB) < Time_(H_HB)
+ * HIGH ___ ____ _.. _________ ___
+ * |_________| |_.. |____| |__|
+ * LOW <L_LB> <H_LB> <L_HB> <H_HB>
+ * [ Low Bit (0) ] [ High Bit(1) ]
+ */
+ if (bit) {
+ gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
+ udelay(KTD2692_TIME_SHORT_BITSET_US);
+ gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
+ udelay(KTD2692_TIME_LONG_BITSET_US);
+ } else {
+ gpiod_direction_output(led->ctrl_gpio, KTD2692_LOW);
+ udelay(KTD2692_TIME_LONG_BITSET_US);
+ gpiod_direction_output(led->ctrl_gpio, KTD2692_HIGH);
+ udelay(KTD2692_TIME_SHORT_BITSET_US);
+ }
+}
+
+static void ktd2692_expresswire_write(struct ktd2692_context *led, u8 value)
+{
+ int i;
+
+ ktd2692_expresswire_start(led);
+ for (i = 7; i >= 0; i--)
+ ktd2692_expresswire_set_bit(led, value & BIT(i));
+ ktd2692_expresswire_end(led);
+}
+
+static int ktd2692_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+ struct ktd2692_context *led = fled_cdev_to_led(fled_cdev);
+
+ mutex_lock(&led->lock);
+
+ if (brightness == LED_OFF) {
+ led->mode = KTD2692_MODE_DISABLE;
+ gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
+ } else {
+ ktd2692_expresswire_write(led, brightness |
+ KTD2692_REG_MOVIE_CURRENT_BASE);
+ led->mode = KTD2692_MODE_MOVIE;
+ }
+
+ ktd2692_expresswire_write(led, led->mode | KTD2692_REG_MODE_BASE);
+ mutex_unlock(&led->lock);
+
+ return 0;
+}
+
+static int ktd2692_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
+ bool state)
+{
+ struct ktd2692_context *led = fled_cdev_to_led(fled_cdev);
+ struct led_flash_setting *timeout = &fled_cdev->timeout;
+ u32 flash_tm_reg;
+
+ mutex_lock(&led->lock);
+
+ if (state) {
+ flash_tm_reg = GET_TIMEOUT_OFFSET(timeout->val, timeout->step);
+ ktd2692_expresswire_write(led, flash_tm_reg
+ | KTD2692_REG_FLASH_TIMEOUT_BASE);
+
+ led->mode = KTD2692_MODE_FLASH;
+ gpiod_direction_output(led->aux_gpio, KTD2692_HIGH);
+ } else {
+ led->mode = KTD2692_MODE_DISABLE;
+ gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
+ }
+
+ ktd2692_expresswire_write(led, led->mode | KTD2692_REG_MODE_BASE);
+
+ fled_cdev->led_cdev.brightness = LED_OFF;
+ led->mode = KTD2692_MODE_DISABLE;
+
+ mutex_unlock(&led->lock);
+
+ return 0;
+}
+
+static int ktd2692_led_flash_timeout_set(struct led_classdev_flash *fled_cdev,
+ u32 timeout)
+{
+ return 0;
+}
+
+static void ktd2692_init_movie_current_max(struct ktd2692_led_config_data *cfg)
+{
+ u32 offset, step;
+ u32 movie_current_microamp;
+
+ offset = KTD2692_MOVIE_MODE_CURRENT_LEVELS;
+ step = KTD2692_MM_TO_FL_RATIO(cfg->flash_max_microamp)
+ / KTD2692_MOVIE_MODE_CURRENT_LEVELS;
+
+ do {
+ movie_current_microamp = step * offset;
+ offset--;
+ } while ((movie_current_microamp > cfg->movie_max_microamp) &&
+ (offset > 0));
+
+ cfg->max_brightness = offset;
+}
+
+static void ktd2692_init_flash_timeout(struct led_classdev_flash *fled_cdev,
+ struct ktd2692_led_config_data *cfg)
+{
+ struct led_flash_setting *setting;
+
+ setting = &fled_cdev->timeout;
+ setting->min = KTD2692_FLASH_MODE_TIMEOUT_DISABLE;
+ setting->max = cfg->flash_max_timeout;
+ setting->step = cfg->flash_max_timeout
+ / (KTD2692_FLASH_MODE_TIMEOUT_LEVELS - 1);
+ setting->val = cfg->flash_max_timeout;
+}
+
+static void ktd2692_setup(struct ktd2692_context *led)
+{
+ led->mode = KTD2692_MODE_DISABLE;
+ ktd2692_expresswire_reset(led);
+ gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
+
+ ktd2692_expresswire_write(led, (KTD2692_MM_MIN_CURR_THRESHOLD_SCALE - 1)
+ | KTD2692_REG_MM_MIN_CURR_THRESHOLD_BASE);
+ ktd2692_expresswire_write(led, KTD2692_FLASH_MODE_CURR_PERCENT(45)
+ | KTD2692_REG_FLASH_CURRENT_BASE);
+}
+
+static void regulator_disable_action(void *_data)
+{
+ struct device *dev = _data;
+ struct ktd2692_context *led = dev_get_drvdata(dev);
+ int ret;
+
+ ret = regulator_disable(led->regulator);
+ if (ret)
+ dev_err(dev, "Failed to disable supply: %d\n", ret);
+}
+
+static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev,
+ struct ktd2692_led_config_data *cfg)
+{
+ struct device_node *np = dev_of_node(dev);
+ struct device_node *child_node;
+ int ret;
+
+ if (!np)
+ return -ENXIO;
+
+ led->ctrl_gpio = devm_gpiod_get(dev, "ctrl", GPIOD_ASIS);
+ ret = PTR_ERR_OR_ZERO(led->ctrl_gpio);
+ if (ret)
+ return dev_err_probe(dev, ret, "cannot get ctrl-gpios\n");
+
+ led->aux_gpio = devm_gpiod_get_optional(dev, "aux", GPIOD_ASIS);
+ if (IS_ERR(led->aux_gpio))
+ return dev_err_probe(dev, PTR_ERR(led->aux_gpio), "cannot get aux-gpios\n");
+
+ led->regulator = devm_regulator_get(dev, "vin");
+ if (IS_ERR(led->regulator))
+ led->regulator = NULL;
+
+ if (led->regulator) {
+ ret = regulator_enable(led->regulator);
+ if (ret) {
+ dev_err(dev, "Failed to enable supply: %d\n", ret);
+ } else {
+ ret = devm_add_action_or_reset(dev,
+ regulator_disable_action, dev);
+ if (ret)
+ return ret;
+ }
+ }
+
+ child_node = of_get_next_available_child(np, NULL);
+ if (!child_node) {
+ dev_err(dev, "No DT child node found for connected LED.\n");
+ return -EINVAL;
+ }
+
+ led->fled_cdev.led_cdev.name =
+ of_get_property(child_node, "label", NULL) ? : child_node->name;
+
+ ret = of_property_read_u32(child_node, "led-max-microamp",
+ &cfg->movie_max_microamp);
+ if (ret) {
+ dev_err(dev, "failed to parse led-max-microamp\n");
+ goto err_parse_dt;
+ }
+
+ ret = of_property_read_u32(child_node, "flash-max-microamp",
+ &cfg->flash_max_microamp);
+ if (ret) {
+ dev_err(dev, "failed to parse flash-max-microamp\n");
+ goto err_parse_dt;
+ }
+
+ ret = of_property_read_u32(child_node, "flash-max-timeout-us",
+ &cfg->flash_max_timeout);
+ if (ret) {
+ dev_err(dev, "failed to parse flash-max-timeout-us\n");
+ goto err_parse_dt;
+ }
+
+err_parse_dt:
+ of_node_put(child_node);
+ return ret;
+}
+
+static const struct led_flash_ops flash_ops = {
+ .strobe_set = ktd2692_led_flash_strobe_set,
+ .timeout_set = ktd2692_led_flash_timeout_set,
+};
+
+static int ktd2692_probe(struct platform_device *pdev)
+{
+ struct ktd2692_context *led;
+ struct led_classdev *led_cdev;
+ struct led_classdev_flash *fled_cdev;
+ struct ktd2692_led_config_data led_cfg;
+ int ret;
+
+ led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ fled_cdev = &led->fled_cdev;
+ led_cdev = &fled_cdev->led_cdev;
+
+ ret = ktd2692_parse_dt(led, &pdev->dev, &led_cfg);
+ if (ret)
+ return ret;
+
+ ktd2692_init_flash_timeout(fled_cdev, &led_cfg);
+ ktd2692_init_movie_current_max(&led_cfg);
+
+ fled_cdev->ops = &flash_ops;
+
+ led_cdev->max_brightness = led_cfg.max_brightness;
+ led_cdev->brightness_set_blocking = ktd2692_led_brightness_set;
+ led_cdev->flags |= LED_CORE_SUSPENDRESUME | LED_DEV_CAP_FLASH;
+
+ mutex_init(&led->lock);
+
+ platform_set_drvdata(pdev, led);
+
+ ret = led_classdev_flash_register(&pdev->dev, fled_cdev);
+ if (ret) {
+ dev_err(&pdev->dev, "can't register LED %s\n", led_cdev->name);
+ mutex_destroy(&led->lock);
+ return ret;
+ }
+
+ ktd2692_setup(led);
+
+ return 0;
+}
+
+static int ktd2692_remove(struct platform_device *pdev)
+{
+ struct ktd2692_context *led = platform_get_drvdata(pdev);
+
+ led_classdev_flash_unregister(&led->fled_cdev);
+
+ mutex_destroy(&led->lock);
+
+ return 0;
+}
+
+static const struct of_device_id ktd2692_match[] = {
+ { .compatible = "kinetic,ktd2692", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ktd2692_match);
+
+static struct platform_driver ktd2692_driver = {
+ .driver = {
+ .name = "ktd2692",
+ .of_match_table = ktd2692_match,
+ },
+ .probe = ktd2692_probe,
+ .remove = ktd2692_remove,
+};
+
+module_platform_driver(ktd2692_driver);
+
+MODULE_AUTHOR("Ingi Kim <ingi2.kim@samsung.com>");
+MODULE_DESCRIPTION("Kinetic KTD2692 LED driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/flash/leds-lm3601x.c b/drivers/leds/flash/leds-lm3601x.c
new file mode 100644
index 000000000..78730e066
--- /dev/null
+++ b/drivers/leds/flash/leds-lm3601x.c
@@ -0,0 +1,482 @@
+// SPDX-License-Identifier: GPL-2.0
+// Flash and torch driver for Texas Instruments LM3601X LED
+// Flash driver chip family
+// Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/led-class-flash.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define LM3601X_LED_IR 0x0
+#define LM3601X_LED_TORCH 0x1
+
+/* Registers */
+#define LM3601X_ENABLE_REG 0x01
+#define LM3601X_CFG_REG 0x02
+#define LM3601X_LED_FLASH_REG 0x03
+#define LM3601X_LED_TORCH_REG 0x04
+#define LM3601X_FLAGS_REG 0x05
+#define LM3601X_DEV_ID_REG 0x06
+
+#define LM3601X_SW_RESET BIT(7)
+
+/* Enable Mode bits */
+#define LM3601X_MODE_STANDBY 0x00
+#define LM3601X_MODE_IR_DRV BIT(0)
+#define LM3601X_MODE_TORCH BIT(1)
+#define LM3601X_MODE_STROBE (BIT(0) | BIT(1))
+#define LM3601X_STRB_EN BIT(2)
+#define LM3601X_STRB_EDGE_TRIG BIT(3)
+#define LM3601X_IVFM_EN BIT(4)
+
+#define LM36010_BOOST_LIMIT_28 BIT(5)
+#define LM36010_BOOST_FREQ_4MHZ BIT(6)
+#define LM36010_BOOST_MODE_PASS BIT(7)
+
+/* Flag Mask */
+#define LM3601X_FLASH_TIME_OUT BIT(0)
+#define LM3601X_UVLO_FAULT BIT(1)
+#define LM3601X_THERM_SHUTDOWN BIT(2)
+#define LM3601X_THERM_CURR BIT(3)
+#define LM36010_CURR_LIMIT BIT(4)
+#define LM3601X_SHORT_FAULT BIT(5)
+#define LM3601X_IVFM_TRIP BIT(6)
+#define LM36010_OVP_FAULT BIT(7)
+
+#define LM3601X_MAX_TORCH_I_UA 376000
+#define LM3601X_MIN_TORCH_I_UA 2400
+#define LM3601X_TORCH_REG_DIV 2965
+
+#define LM3601X_MAX_STROBE_I_UA 1500000
+#define LM3601X_MIN_STROBE_I_UA 11000
+#define LM3601X_STROBE_REG_DIV 11800
+
+#define LM3601X_TIMEOUT_MASK 0x1e
+#define LM3601X_ENABLE_MASK (LM3601X_MODE_IR_DRV | LM3601X_MODE_TORCH)
+
+#define LM3601X_LOWER_STEP_US 40000
+#define LM3601X_UPPER_STEP_US 200000
+#define LM3601X_MIN_TIMEOUT_US 40000
+#define LM3601X_MAX_TIMEOUT_US 1600000
+#define LM3601X_TIMEOUT_XOVER_US 400000
+
+enum lm3601x_type {
+ CHIP_LM36010 = 0,
+ CHIP_LM36011,
+};
+
+/**
+ * struct lm3601x_led -
+ * @fled_cdev: flash LED class device pointer
+ * @client: Pointer to the I2C client
+ * @regmap: Devices register map
+ * @lock: Lock for reading/writing the device
+ * @led_name: LED label for the Torch or IR LED
+ * @flash_timeout: the timeout for the flash
+ * @last_flag: last known flags register value
+ * @torch_current_max: maximum current for the torch
+ * @flash_current_max: maximum current for the flash
+ * @max_flash_timeout: maximum timeout for the flash
+ * @led_mode: The mode to enable either IR or Torch
+ */
+struct lm3601x_led {
+ struct led_classdev_flash fled_cdev;
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct mutex lock;
+
+ unsigned int flash_timeout;
+ unsigned int last_flag;
+
+ u32 torch_current_max;
+ u32 flash_current_max;
+ u32 max_flash_timeout;
+
+ u32 led_mode;
+};
+
+static const struct reg_default lm3601x_regmap_defs[] = {
+ { LM3601X_ENABLE_REG, 0x20 },
+ { LM3601X_CFG_REG, 0x15 },
+ { LM3601X_LED_FLASH_REG, 0x00 },
+ { LM3601X_LED_TORCH_REG, 0x00 },
+};
+
+static bool lm3601x_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case LM3601X_FLAGS_REG:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config lm3601x_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LM3601X_DEV_ID_REG,
+ .reg_defaults = lm3601x_regmap_defs,
+ .num_reg_defaults = ARRAY_SIZE(lm3601x_regmap_defs),
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = lm3601x_volatile_reg,
+};
+
+static struct lm3601x_led *fled_cdev_to_led(struct led_classdev_flash *fled_cdev)
+{
+ return container_of(fled_cdev, struct lm3601x_led, fled_cdev);
+}
+
+static int lm3601x_read_faults(struct lm3601x_led *led)
+{
+ int flags_val;
+ int ret;
+
+ ret = regmap_read(led->regmap, LM3601X_FLAGS_REG, &flags_val);
+ if (ret < 0)
+ return -EIO;
+
+ led->last_flag = 0;
+
+ if (flags_val & LM36010_OVP_FAULT)
+ led->last_flag |= LED_FAULT_OVER_VOLTAGE;
+
+ if (flags_val & (LM3601X_THERM_SHUTDOWN | LM3601X_THERM_CURR))
+ led->last_flag |= LED_FAULT_OVER_TEMPERATURE;
+
+ if (flags_val & LM3601X_SHORT_FAULT)
+ led->last_flag |= LED_FAULT_SHORT_CIRCUIT;
+
+ if (flags_val & LM36010_CURR_LIMIT)
+ led->last_flag |= LED_FAULT_OVER_CURRENT;
+
+ if (flags_val & LM3601X_UVLO_FAULT)
+ led->last_flag |= LED_FAULT_UNDER_VOLTAGE;
+
+ if (flags_val & LM3601X_IVFM_TRIP)
+ led->last_flag |= LED_FAULT_INPUT_VOLTAGE;
+
+ if (flags_val & LM3601X_THERM_SHUTDOWN)
+ led->last_flag |= LED_FAULT_LED_OVER_TEMPERATURE;
+
+ return led->last_flag;
+}
+
+static int lm3601x_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(cdev);
+ struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
+ int ret, led_mode_val;
+
+ mutex_lock(&led->lock);
+
+ ret = lm3601x_read_faults(led);
+ if (ret < 0)
+ goto out;
+
+ if (led->led_mode == LM3601X_LED_TORCH)
+ led_mode_val = LM3601X_MODE_TORCH;
+ else
+ led_mode_val = LM3601X_MODE_IR_DRV;
+
+ if (brightness == LED_OFF) {
+ ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
+ led_mode_val, LED_OFF);
+ goto out;
+ }
+
+ ret = regmap_write(led->regmap, LM3601X_LED_TORCH_REG, brightness);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
+ LM3601X_MODE_TORCH | LM3601X_MODE_IR_DRV,
+ led_mode_val);
+out:
+ mutex_unlock(&led->lock);
+ return ret;
+}
+
+static int lm3601x_strobe_set(struct led_classdev_flash *fled_cdev,
+ bool state)
+{
+ struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
+ int timeout_reg_val;
+ int current_timeout;
+ int ret;
+
+ mutex_lock(&led->lock);
+
+ ret = regmap_read(led->regmap, LM3601X_CFG_REG, &current_timeout);
+ if (ret < 0)
+ goto out;
+
+ if (led->flash_timeout >= LM3601X_TIMEOUT_XOVER_US)
+ timeout_reg_val = led->flash_timeout / LM3601X_UPPER_STEP_US + 0x07;
+ else
+ timeout_reg_val = led->flash_timeout / LM3601X_LOWER_STEP_US - 0x01;
+
+ if (led->flash_timeout != current_timeout)
+ ret = regmap_update_bits(led->regmap, LM3601X_CFG_REG,
+ LM3601X_TIMEOUT_MASK, timeout_reg_val);
+
+ if (state)
+ ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
+ LM3601X_MODE_TORCH | LM3601X_MODE_IR_DRV,
+ LM3601X_MODE_STROBE);
+ else
+ ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
+ LM3601X_MODE_STROBE, LED_OFF);
+
+ ret = lm3601x_read_faults(led);
+out:
+ mutex_unlock(&led->lock);
+ return ret;
+}
+
+static int lm3601x_flash_brightness_set(struct led_classdev_flash *fled_cdev,
+ u32 brightness)
+{
+ struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
+ u8 brightness_val;
+ int ret;
+
+ mutex_lock(&led->lock);
+ ret = lm3601x_read_faults(led);
+ if (ret < 0)
+ goto out;
+
+ if (brightness == LED_OFF) {
+ ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
+ LM3601X_MODE_STROBE, LED_OFF);
+ goto out;
+ }
+
+ brightness_val = brightness / LM3601X_STROBE_REG_DIV;
+
+ ret = regmap_write(led->regmap, LM3601X_LED_FLASH_REG, brightness_val);
+out:
+ mutex_unlock(&led->lock);
+ return ret;
+}
+
+static int lm3601x_flash_timeout_set(struct led_classdev_flash *fled_cdev,
+ u32 timeout)
+{
+ struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
+
+ mutex_lock(&led->lock);
+
+ led->flash_timeout = timeout;
+
+ mutex_unlock(&led->lock);
+
+ return 0;
+}
+
+static int lm3601x_strobe_get(struct led_classdev_flash *fled_cdev, bool *state)
+{
+ struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
+ int strobe_state;
+ int ret;
+
+ mutex_lock(&led->lock);
+
+ ret = regmap_read(led->regmap, LM3601X_ENABLE_REG, &strobe_state);
+ if (ret < 0)
+ goto out;
+
+ *state = strobe_state & LM3601X_MODE_STROBE;
+
+out:
+ mutex_unlock(&led->lock);
+ return ret;
+}
+
+static int lm3601x_flash_fault_get(struct led_classdev_flash *fled_cdev,
+ u32 *fault)
+{
+ struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
+
+ lm3601x_read_faults(led);
+
+ *fault = led->last_flag;
+
+ return 0;
+}
+
+static const struct led_flash_ops flash_ops = {
+ .flash_brightness_set = lm3601x_flash_brightness_set,
+ .strobe_set = lm3601x_strobe_set,
+ .strobe_get = lm3601x_strobe_get,
+ .timeout_set = lm3601x_flash_timeout_set,
+ .fault_get = lm3601x_flash_fault_get,
+};
+
+static int lm3601x_register_leds(struct lm3601x_led *led,
+ struct fwnode_handle *fwnode)
+{
+ struct led_classdev *led_cdev;
+ struct led_flash_setting *setting;
+ struct led_init_data init_data = {};
+
+ led->fled_cdev.ops = &flash_ops;
+
+ setting = &led->fled_cdev.timeout;
+ setting->min = LM3601X_MIN_TIMEOUT_US;
+ setting->max = led->max_flash_timeout;
+ setting->step = LM3601X_LOWER_STEP_US;
+ setting->val = led->max_flash_timeout;
+
+ setting = &led->fled_cdev.brightness;
+ setting->min = LM3601X_MIN_STROBE_I_UA;
+ setting->max = led->flash_current_max;
+ setting->step = LM3601X_TORCH_REG_DIV;
+ setting->val = led->flash_current_max;
+
+ led_cdev = &led->fled_cdev.led_cdev;
+ led_cdev->brightness_set_blocking = lm3601x_brightness_set;
+ led_cdev->max_brightness = DIV_ROUND_UP(led->torch_current_max,
+ LM3601X_TORCH_REG_DIV);
+ led_cdev->flags |= LED_DEV_CAP_FLASH;
+
+ init_data.fwnode = fwnode;
+ init_data.devicename = led->client->name;
+ init_data.default_label = (led->led_mode == LM3601X_LED_TORCH) ?
+ "torch" : "infrared";
+ return devm_led_classdev_flash_register_ext(&led->client->dev,
+ &led->fled_cdev, &init_data);
+}
+
+static int lm3601x_parse_node(struct lm3601x_led *led,
+ struct fwnode_handle **fwnode)
+{
+ struct fwnode_handle *child = NULL;
+ int ret = -ENODEV;
+
+ child = device_get_next_child_node(&led->client->dev, child);
+ if (!child) {
+ dev_err(&led->client->dev, "No LED Child node\n");
+ return ret;
+ }
+
+ ret = fwnode_property_read_u32(child, "reg", &led->led_mode);
+ if (ret) {
+ dev_err(&led->client->dev, "reg DT property missing\n");
+ goto out_err;
+ }
+
+ if (led->led_mode > LM3601X_LED_TORCH ||
+ led->led_mode < LM3601X_LED_IR) {
+ dev_warn(&led->client->dev, "Invalid led mode requested\n");
+ ret = -EINVAL;
+ goto out_err;
+ }
+
+ ret = fwnode_property_read_u32(child, "led-max-microamp",
+ &led->torch_current_max);
+ if (ret) {
+ dev_warn(&led->client->dev,
+ "led-max-microamp DT property missing\n");
+ goto out_err;
+ }
+
+ ret = fwnode_property_read_u32(child, "flash-max-microamp",
+ &led->flash_current_max);
+ if (ret) {
+ dev_warn(&led->client->dev,
+ "flash-max-microamp DT property missing\n");
+ goto out_err;
+ }
+
+ ret = fwnode_property_read_u32(child, "flash-max-timeout-us",
+ &led->max_flash_timeout);
+ if (ret) {
+ dev_warn(&led->client->dev,
+ "flash-max-timeout-us DT property missing\n");
+ goto out_err;
+ }
+
+ *fwnode = child;
+
+out_err:
+ fwnode_handle_put(child);
+ return ret;
+}
+
+static int lm3601x_probe(struct i2c_client *client)
+{
+ struct lm3601x_led *led;
+ struct fwnode_handle *fwnode;
+ int ret;
+
+ led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->client = client;
+ i2c_set_clientdata(client, led);
+
+ ret = lm3601x_parse_node(led, &fwnode);
+ if (ret)
+ return -ENODEV;
+
+ led->regmap = devm_regmap_init_i2c(client, &lm3601x_regmap);
+ if (IS_ERR(led->regmap)) {
+ ret = PTR_ERR(led->regmap);
+ dev_err(&client->dev,
+ "Failed to allocate register map: %d\n", ret);
+ return ret;
+ }
+
+ mutex_init(&led->lock);
+
+ return lm3601x_register_leds(led, fwnode);
+}
+
+static void lm3601x_remove(struct i2c_client *client)
+{
+ struct lm3601x_led *led = i2c_get_clientdata(client);
+ int ret;
+
+ ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
+ LM3601X_ENABLE_MASK, LM3601X_MODE_STANDBY);
+ if (ret)
+ dev_warn(&client->dev,
+ "Failed to put into standby (%pe)\n", ERR_PTR(ret));
+}
+
+static const struct i2c_device_id lm3601x_id[] = {
+ { "LM36010", CHIP_LM36010 },
+ { "LM36011", CHIP_LM36011 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm3601x_id);
+
+static const struct of_device_id of_lm3601x_leds_match[] = {
+ { .compatible = "ti,lm36010", },
+ { .compatible = "ti,lm36011", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, of_lm3601x_leds_match);
+
+static struct i2c_driver lm3601x_i2c_driver = {
+ .driver = {
+ .name = "lm3601x",
+ .of_match_table = of_lm3601x_leds_match,
+ },
+ .probe_new = lm3601x_probe,
+ .remove = lm3601x_remove,
+ .id_table = lm3601x_id,
+};
+module_i2c_driver(lm3601x_i2c_driver);
+
+MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3601X");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/flash/leds-max77693.c b/drivers/leds/flash/leds-max77693.c
new file mode 100644
index 000000000..5c1faeb55
--- /dev/null
+++ b/drivers/leds/flash/leds-max77693.c
@@ -0,0 +1,1059 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Flash class driver for the flash cell of max77693 mfd.
+ *
+ * Copyright (C) 2015, Samsung Electronics Co., Ltd.
+ *
+ * Authors: Jacek Anaszewski <j.anaszewski@samsung.com>
+ * Andrzej Hajda <a.hajda@samsung.com>
+ */
+
+#include <linux/led-class-flash.h>
+#include <linux/mfd/max77693.h>
+#include <linux/mfd/max77693-common.h>
+#include <linux/mfd/max77693-private.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <media/v4l2-flash-led-class.h>
+
+#define MODE_OFF 0
+#define MODE_FLASH(a) (1 << (a))
+#define MODE_TORCH(a) (1 << (2 + (a)))
+#define MODE_FLASH_EXTERNAL(a) (1 << (4 + (a)))
+
+#define MODE_FLASH_MASK (MODE_FLASH(FLED1) | MODE_FLASH(FLED2) | \
+ MODE_FLASH_EXTERNAL(FLED1) | \
+ MODE_FLASH_EXTERNAL(FLED2))
+#define MODE_TORCH_MASK (MODE_TORCH(FLED1) | MODE_TORCH(FLED2))
+
+#define FLED1_IOUT (1 << 0)
+#define FLED2_IOUT (1 << 1)
+
+enum max77693_fled {
+ FLED1,
+ FLED2,
+};
+
+enum max77693_led_mode {
+ FLASH,
+ TORCH,
+};
+
+struct max77693_led_config_data {
+ const char *label[2];
+ u32 iout_torch_max[2];
+ u32 iout_flash_max[2];
+ u32 flash_timeout_max[2];
+ u32 num_leds;
+ u32 boost_mode;
+ u32 boost_vout;
+ u32 low_vsys;
+};
+
+struct max77693_sub_led {
+ /* corresponding FLED output identifier */
+ int fled_id;
+ /* corresponding LED Flash class device */
+ struct led_classdev_flash fled_cdev;
+ /* V4L2 Flash device */
+ struct v4l2_flash *v4l2_flash;
+
+ /* brightness cache */
+ unsigned int torch_brightness;
+ /* flash timeout cache */
+ unsigned int flash_timeout;
+ /* flash faults that may have occurred */
+ u32 flash_faults;
+};
+
+struct max77693_led_device {
+ /* parent mfd regmap */
+ struct regmap *regmap;
+ /* platform device data */
+ struct platform_device *pdev;
+ /* secures access to the device */
+ struct mutex lock;
+
+ /* sub led data */
+ struct max77693_sub_led sub_leds[2];
+
+ /* maximum torch current values for FLED outputs */
+ u32 iout_torch_max[2];
+ /* maximum flash current values for FLED outputs */
+ u32 iout_flash_max[2];
+
+ /* current flash timeout cache */
+ unsigned int current_flash_timeout;
+ /* ITORCH register cache */
+ u8 torch_iout_reg;
+ /* mode of fled outputs */
+ unsigned int mode_flags;
+ /* recently strobed fled */
+ int strobing_sub_led_id;
+ /* bitmask of FLED outputs use state (bit 0. - FLED1, bit 1. - FLED2) */
+ u8 fled_mask;
+ /* FLED modes that can be set */
+ u8 allowed_modes;
+
+ /* arrangement of current outputs */
+ bool iout_joint;
+};
+
+static u8 max77693_led_iout_to_reg(u32 ua)
+{
+ if (ua < FLASH_IOUT_MIN)
+ ua = FLASH_IOUT_MIN;
+ return (ua - FLASH_IOUT_MIN) / FLASH_IOUT_STEP;
+}
+
+static u8 max77693_flash_timeout_to_reg(u32 us)
+{
+ return (us - FLASH_TIMEOUT_MIN) / FLASH_TIMEOUT_STEP;
+}
+
+static inline struct max77693_sub_led *flcdev_to_sub_led(
+ struct led_classdev_flash *fled_cdev)
+{
+ return container_of(fled_cdev, struct max77693_sub_led, fled_cdev);
+}
+
+static inline struct max77693_led_device *sub_led_to_led(
+ struct max77693_sub_led *sub_led)
+{
+ return container_of(sub_led, struct max77693_led_device,
+ sub_leds[sub_led->fled_id]);
+}
+
+static inline u8 max77693_led_vsys_to_reg(u32 mv)
+{
+ return ((mv - MAX_FLASH1_VSYS_MIN) / MAX_FLASH1_VSYS_STEP) << 2;
+}
+
+static inline u8 max77693_led_vout_to_reg(u32 mv)
+{
+ return (mv - FLASH_VOUT_MIN) / FLASH_VOUT_STEP + FLASH_VOUT_RMIN;
+}
+
+static inline bool max77693_fled_used(struct max77693_led_device *led,
+ int fled_id)
+{
+ u8 fled_bit = (fled_id == FLED1) ? FLED1_IOUT : FLED2_IOUT;
+
+ return led->fled_mask & fled_bit;
+}
+
+static int max77693_set_mode_reg(struct max77693_led_device *led, u8 mode)
+{
+ struct regmap *rmap = led->regmap;
+ int ret, v = 0, i;
+
+ for (i = FLED1; i <= FLED2; ++i) {
+ if (mode & MODE_TORCH(i))
+ v |= FLASH_EN_ON << TORCH_EN_SHIFT(i);
+
+ if (mode & MODE_FLASH(i)) {
+ v |= FLASH_EN_ON << FLASH_EN_SHIFT(i);
+ } else if (mode & MODE_FLASH_EXTERNAL(i)) {
+ v |= FLASH_EN_FLASH << FLASH_EN_SHIFT(i);
+ /*
+ * Enable hw triggering also for torch mode, as some
+ * camera sensors use torch led to fathom ambient light
+ * conditions before strobing the flash.
+ */
+ v |= FLASH_EN_TORCH << TORCH_EN_SHIFT(i);
+ }
+ }
+
+ /* Reset the register only prior setting flash modes */
+ if (mode & ~(MODE_TORCH(FLED1) | MODE_TORCH(FLED2))) {
+ ret = regmap_write(rmap, MAX77693_LED_REG_FLASH_EN, 0);
+ if (ret < 0)
+ return ret;
+ }
+
+ return regmap_write(rmap, MAX77693_LED_REG_FLASH_EN, v);
+}
+
+static int max77693_add_mode(struct max77693_led_device *led, u8 mode)
+{
+ u8 new_mode_flags;
+ int i, ret;
+
+ if (led->iout_joint)
+ /* Span the mode on FLED2 for joint iouts case */
+ mode |= (mode << 1);
+
+ /*
+ * FLASH_EXTERNAL mode activates FLASHEN and TORCHEN pins in the device.
+ * Corresponding register bit fields interfere with SW triggered modes,
+ * thus clear them to ensure proper device configuration.
+ */
+ for (i = FLED1; i <= FLED2; ++i)
+ if (mode & MODE_FLASH_EXTERNAL(i))
+ led->mode_flags &= (~MODE_TORCH(i) & ~MODE_FLASH(i));
+
+ new_mode_flags = mode | led->mode_flags;
+ new_mode_flags &= led->allowed_modes;
+
+ if (new_mode_flags ^ led->mode_flags)
+ led->mode_flags = new_mode_flags;
+ else
+ return 0;
+
+ ret = max77693_set_mode_reg(led, led->mode_flags);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Clear flash mode flag after setting the mode to avoid spurious flash
+ * strobing on each subsequent torch mode setting.
+ */
+ if (mode & MODE_FLASH_MASK)
+ led->mode_flags &= ~mode;
+
+ return ret;
+}
+
+static int max77693_clear_mode(struct max77693_led_device *led,
+ u8 mode)
+{
+ if (led->iout_joint)
+ /* Clear mode also on FLED2 for joint iouts case */
+ mode |= (mode << 1);
+
+ led->mode_flags &= ~mode;
+
+ return max77693_set_mode_reg(led, led->mode_flags);
+}
+
+static void max77693_add_allowed_modes(struct max77693_led_device *led,
+ int fled_id, enum max77693_led_mode mode)
+{
+ if (mode == FLASH)
+ led->allowed_modes |= (MODE_FLASH(fled_id) |
+ MODE_FLASH_EXTERNAL(fled_id));
+ else
+ led->allowed_modes |= MODE_TORCH(fled_id);
+}
+
+static void max77693_distribute_currents(struct max77693_led_device *led,
+ int fled_id, enum max77693_led_mode mode,
+ u32 micro_amp, u32 iout_max[2], u32 iout[2])
+{
+ if (!led->iout_joint) {
+ iout[fled_id] = micro_amp;
+ max77693_add_allowed_modes(led, fled_id, mode);
+ return;
+ }
+
+ iout[FLED1] = min(micro_amp, iout_max[FLED1]);
+ iout[FLED2] = micro_amp - iout[FLED1];
+
+ if (mode == FLASH)
+ led->allowed_modes &= ~MODE_FLASH_MASK;
+ else
+ led->allowed_modes &= ~MODE_TORCH_MASK;
+
+ max77693_add_allowed_modes(led, FLED1, mode);
+
+ if (iout[FLED2])
+ max77693_add_allowed_modes(led, FLED2, mode);
+}
+
+static int max77693_set_torch_current(struct max77693_led_device *led,
+ int fled_id, u32 micro_amp)
+{
+ struct regmap *rmap = led->regmap;
+ u8 iout1_reg = 0, iout2_reg = 0;
+ u32 iout[2];
+
+ max77693_distribute_currents(led, fled_id, TORCH, micro_amp,
+ led->iout_torch_max, iout);
+
+ if (fled_id == FLED1 || led->iout_joint) {
+ iout1_reg = max77693_led_iout_to_reg(iout[FLED1]);
+ led->torch_iout_reg &= TORCH_IOUT_MASK(TORCH_IOUT2_SHIFT);
+ }
+ if (fled_id == FLED2 || led->iout_joint) {
+ iout2_reg = max77693_led_iout_to_reg(iout[FLED2]);
+ led->torch_iout_reg &= TORCH_IOUT_MASK(TORCH_IOUT1_SHIFT);
+ }
+
+ led->torch_iout_reg |= ((iout1_reg << TORCH_IOUT1_SHIFT) |
+ (iout2_reg << TORCH_IOUT2_SHIFT));
+
+ return regmap_write(rmap, MAX77693_LED_REG_ITORCH,
+ led->torch_iout_reg);
+}
+
+static int max77693_set_flash_current(struct max77693_led_device *led,
+ int fled_id,
+ u32 micro_amp)
+{
+ struct regmap *rmap = led->regmap;
+ u8 iout1_reg, iout2_reg;
+ u32 iout[2];
+ int ret = -EINVAL;
+
+ max77693_distribute_currents(led, fled_id, FLASH, micro_amp,
+ led->iout_flash_max, iout);
+
+ if (fled_id == FLED1 || led->iout_joint) {
+ iout1_reg = max77693_led_iout_to_reg(iout[FLED1]);
+ ret = regmap_write(rmap, MAX77693_LED_REG_IFLASH1,
+ iout1_reg);
+ if (ret < 0)
+ return ret;
+ }
+ if (fled_id == FLED2 || led->iout_joint) {
+ iout2_reg = max77693_led_iout_to_reg(iout[FLED2]);
+ ret = regmap_write(rmap, MAX77693_LED_REG_IFLASH2,
+ iout2_reg);
+ }
+
+ return ret;
+}
+
+static int max77693_set_timeout(struct max77693_led_device *led, u32 microsec)
+{
+ struct regmap *rmap = led->regmap;
+ u8 v;
+ int ret;
+
+ v = max77693_flash_timeout_to_reg(microsec) | FLASH_TMR_LEVEL;
+
+ ret = regmap_write(rmap, MAX77693_LED_REG_FLASH_TIMER, v);
+ if (ret < 0)
+ return ret;
+
+ led->current_flash_timeout = microsec;
+
+ return 0;
+}
+
+static int max77693_get_strobe_status(struct max77693_led_device *led,
+ bool *state)
+{
+ struct regmap *rmap = led->regmap;
+ unsigned int v;
+ int ret;
+
+ ret = regmap_read(rmap, MAX77693_LED_REG_FLASH_STATUS, &v);
+ if (ret < 0)
+ return ret;
+
+ *state = v & FLASH_STATUS_FLASH_ON;
+
+ return ret;
+}
+
+static int max77693_get_flash_faults(struct max77693_sub_led *sub_led)
+{
+ struct max77693_led_device *led = sub_led_to_led(sub_led);
+ struct regmap *rmap = led->regmap;
+ unsigned int v;
+ u8 fault_open_mask, fault_short_mask;
+ int ret;
+
+ sub_led->flash_faults = 0;
+
+ if (led->iout_joint) {
+ fault_open_mask = FLASH_INT_FLED1_OPEN | FLASH_INT_FLED2_OPEN;
+ fault_short_mask = FLASH_INT_FLED1_SHORT |
+ FLASH_INT_FLED2_SHORT;
+ } else {
+ fault_open_mask = (sub_led->fled_id == FLED1) ?
+ FLASH_INT_FLED1_OPEN :
+ FLASH_INT_FLED2_OPEN;
+ fault_short_mask = (sub_led->fled_id == FLED1) ?
+ FLASH_INT_FLED1_SHORT :
+ FLASH_INT_FLED2_SHORT;
+ }
+
+ ret = regmap_read(rmap, MAX77693_LED_REG_FLASH_INT, &v);
+ if (ret < 0)
+ return ret;
+
+ if (v & fault_open_mask)
+ sub_led->flash_faults |= LED_FAULT_OVER_VOLTAGE;
+ if (v & fault_short_mask)
+ sub_led->flash_faults |= LED_FAULT_SHORT_CIRCUIT;
+ if (v & FLASH_INT_OVER_CURRENT)
+ sub_led->flash_faults |= LED_FAULT_OVER_CURRENT;
+
+ return 0;
+}
+
+static int max77693_setup(struct max77693_led_device *led,
+ struct max77693_led_config_data *led_cfg)
+{
+ struct regmap *rmap = led->regmap;
+ int i, first_led, last_led, ret;
+ u32 max_flash_curr[2];
+ u8 v;
+
+ /*
+ * Initialize only flash current. Torch current doesn't
+ * require initialization as ITORCH register is written with
+ * new value each time brightness_set op is called.
+ */
+ if (led->iout_joint) {
+ first_led = FLED1;
+ last_led = FLED1;
+ max_flash_curr[FLED1] = led_cfg->iout_flash_max[FLED1] +
+ led_cfg->iout_flash_max[FLED2];
+ } else {
+ first_led = max77693_fled_used(led, FLED1) ? FLED1 : FLED2;
+ last_led = max77693_fled_used(led, FLED2) ? FLED2 : FLED1;
+ max_flash_curr[FLED1] = led_cfg->iout_flash_max[FLED1];
+ max_flash_curr[FLED2] = led_cfg->iout_flash_max[FLED2];
+ }
+
+ for (i = first_led; i <= last_led; ++i) {
+ ret = max77693_set_flash_current(led, i,
+ max_flash_curr[i]);
+ if (ret < 0)
+ return ret;
+ }
+
+ v = TORCH_TMR_NO_TIMER | MAX77693_LED_TRIG_TYPE_LEVEL;
+ ret = regmap_write(rmap, MAX77693_LED_REG_ITORCHTIMER, v);
+ if (ret < 0)
+ return ret;
+
+ if (led_cfg->low_vsys > 0)
+ v = max77693_led_vsys_to_reg(led_cfg->low_vsys) |
+ MAX_FLASH1_MAX_FL_EN;
+ else
+ v = 0;
+
+ ret = regmap_write(rmap, MAX77693_LED_REG_MAX_FLASH1, v);
+ if (ret < 0)
+ return ret;
+ ret = regmap_write(rmap, MAX77693_LED_REG_MAX_FLASH2, 0);
+ if (ret < 0)
+ return ret;
+
+ if (led_cfg->boost_mode == MAX77693_LED_BOOST_FIXED)
+ v = FLASH_BOOST_FIXED;
+ else
+ v = led_cfg->boost_mode | led_cfg->boost_mode << 1;
+
+ if (max77693_fled_used(led, FLED1) && max77693_fled_used(led, FLED2))
+ v |= FLASH_BOOST_LEDNUM_2;
+
+ ret = regmap_write(rmap, MAX77693_LED_REG_VOUT_CNTL, v);
+ if (ret < 0)
+ return ret;
+
+ v = max77693_led_vout_to_reg(led_cfg->boost_vout);
+ ret = regmap_write(rmap, MAX77693_LED_REG_VOUT_FLASH1, v);
+ if (ret < 0)
+ return ret;
+
+ return max77693_set_mode_reg(led, MODE_OFF);
+}
+
+/* LED subsystem callbacks */
+static int max77693_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+ struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev);
+ struct max77693_led_device *led = sub_led_to_led(sub_led);
+ int fled_id = sub_led->fled_id, ret;
+
+ mutex_lock(&led->lock);
+
+ if (value == 0) {
+ ret = max77693_clear_mode(led, MODE_TORCH(fled_id));
+ if (ret < 0)
+ dev_dbg(&led->pdev->dev,
+ "Failed to clear torch mode (%d)\n",
+ ret);
+ goto unlock;
+ }
+
+ ret = max77693_set_torch_current(led, fled_id, value * TORCH_IOUT_STEP);
+ if (ret < 0) {
+ dev_dbg(&led->pdev->dev,
+ "Failed to set torch current (%d)\n",
+ ret);
+ goto unlock;
+ }
+
+ ret = max77693_add_mode(led, MODE_TORCH(fled_id));
+ if (ret < 0)
+ dev_dbg(&led->pdev->dev,
+ "Failed to set torch mode (%d)\n",
+ ret);
+unlock:
+ mutex_unlock(&led->lock);
+
+ return ret;
+}
+
+static int max77693_led_flash_brightness_set(
+ struct led_classdev_flash *fled_cdev,
+ u32 brightness)
+{
+ struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev);
+ struct max77693_led_device *led = sub_led_to_led(sub_led);
+ int ret;
+
+ mutex_lock(&led->lock);
+ ret = max77693_set_flash_current(led, sub_led->fled_id, brightness);
+ mutex_unlock(&led->lock);
+
+ return ret;
+}
+
+static int max77693_led_flash_strobe_set(
+ struct led_classdev_flash *fled_cdev,
+ bool state)
+{
+ struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev);
+ struct max77693_led_device *led = sub_led_to_led(sub_led);
+ int fled_id = sub_led->fled_id;
+ int ret;
+
+ mutex_lock(&led->lock);
+
+ if (!state) {
+ ret = max77693_clear_mode(led, MODE_FLASH(fled_id));
+ goto unlock;
+ }
+
+ if (sub_led->flash_timeout != led->current_flash_timeout) {
+ ret = max77693_set_timeout(led, sub_led->flash_timeout);
+ if (ret < 0)
+ goto unlock;
+ }
+
+ led->strobing_sub_led_id = fled_id;
+
+ ret = max77693_add_mode(led, MODE_FLASH(fled_id));
+ if (ret < 0)
+ goto unlock;
+
+ ret = max77693_get_flash_faults(sub_led);
+
+unlock:
+ mutex_unlock(&led->lock);
+ return ret;
+}
+
+static int max77693_led_flash_fault_get(
+ struct led_classdev_flash *fled_cdev,
+ u32 *fault)
+{
+ struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev);
+
+ *fault = sub_led->flash_faults;
+
+ return 0;
+}
+
+static int max77693_led_flash_strobe_get(
+ struct led_classdev_flash *fled_cdev,
+ bool *state)
+{
+ struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev);
+ struct max77693_led_device *led = sub_led_to_led(sub_led);
+ int ret;
+
+ if (!state)
+ return -EINVAL;
+
+ mutex_lock(&led->lock);
+
+ ret = max77693_get_strobe_status(led, state);
+
+ *state = !!(*state && (led->strobing_sub_led_id == sub_led->fled_id));
+
+ mutex_unlock(&led->lock);
+
+ return ret;
+}
+
+static int max77693_led_flash_timeout_set(
+ struct led_classdev_flash *fled_cdev,
+ u32 timeout)
+{
+ struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev);
+ struct max77693_led_device *led = sub_led_to_led(sub_led);
+
+ mutex_lock(&led->lock);
+ sub_led->flash_timeout = timeout;
+ mutex_unlock(&led->lock);
+
+ return 0;
+}
+
+static int max77693_led_parse_dt(struct max77693_led_device *led,
+ struct max77693_led_config_data *cfg,
+ struct device_node **sub_nodes)
+{
+ struct device *dev = &led->pdev->dev;
+ struct max77693_sub_led *sub_leds = led->sub_leds;
+ struct device_node *node = dev_of_node(dev), *child_node;
+ struct property *prop;
+ u32 led_sources[2];
+ int i, ret, fled_id;
+
+ of_property_read_u32(node, "maxim,boost-mode", &cfg->boost_mode);
+ of_property_read_u32(node, "maxim,boost-mvout", &cfg->boost_vout);
+ of_property_read_u32(node, "maxim,mvsys-min", &cfg->low_vsys);
+
+ for_each_available_child_of_node(node, child_node) {
+ prop = of_find_property(child_node, "led-sources", NULL);
+ if (prop) {
+ const __be32 *srcs = NULL;
+
+ for (i = 0; i < ARRAY_SIZE(led_sources); ++i) {
+ srcs = of_prop_next_u32(prop, srcs,
+ &led_sources[i]);
+ if (!srcs)
+ break;
+ }
+ } else {
+ dev_err(dev,
+ "led-sources DT property missing\n");
+ of_node_put(child_node);
+ return -EINVAL;
+ }
+
+ if (i == 2) {
+ fled_id = FLED1;
+ led->fled_mask = FLED1_IOUT | FLED2_IOUT;
+ } else if (led_sources[0] == FLED1) {
+ fled_id = FLED1;
+ led->fled_mask |= FLED1_IOUT;
+ } else if (led_sources[0] == FLED2) {
+ fled_id = FLED2;
+ led->fled_mask |= FLED2_IOUT;
+ } else {
+ dev_err(dev,
+ "Wrong led-sources DT property value.\n");
+ of_node_put(child_node);
+ return -EINVAL;
+ }
+
+ if (sub_nodes[fled_id]) {
+ dev_err(dev,
+ "Conflicting \"led-sources\" DT properties\n");
+ of_node_put(child_node);
+ return -EINVAL;
+ }
+
+ sub_nodes[fled_id] = child_node;
+ sub_leds[fled_id].fled_id = fled_id;
+
+ cfg->label[fled_id] =
+ of_get_property(child_node, "label", NULL) ? :
+ child_node->name;
+
+ ret = of_property_read_u32(child_node, "led-max-microamp",
+ &cfg->iout_torch_max[fled_id]);
+ if (ret < 0) {
+ cfg->iout_torch_max[fled_id] = TORCH_IOUT_MIN;
+ dev_warn(dev, "led-max-microamp DT property missing\n");
+ }
+
+ ret = of_property_read_u32(child_node, "flash-max-microamp",
+ &cfg->iout_flash_max[fled_id]);
+ if (ret < 0) {
+ cfg->iout_flash_max[fled_id] = FLASH_IOUT_MIN;
+ dev_warn(dev,
+ "flash-max-microamp DT property missing\n");
+ }
+
+ ret = of_property_read_u32(child_node, "flash-max-timeout-us",
+ &cfg->flash_timeout_max[fled_id]);
+ if (ret < 0) {
+ cfg->flash_timeout_max[fled_id] = FLASH_TIMEOUT_MIN;
+ dev_warn(dev,
+ "flash-max-timeout-us DT property missing\n");
+ }
+
+ if (++cfg->num_leds == 2 ||
+ (max77693_fled_used(led, FLED1) &&
+ max77693_fled_used(led, FLED2))) {
+ of_node_put(child_node);
+ break;
+ }
+ }
+
+ if (cfg->num_leds == 0) {
+ dev_err(dev, "No DT child node found for connected LED(s).\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void clamp_align(u32 *v, u32 min, u32 max, u32 step)
+{
+ *v = clamp_val(*v, min, max);
+ if (step > 1)
+ *v = (*v - min) / step * step + min;
+}
+
+static void max77693_align_iout_current(struct max77693_led_device *led,
+ u32 *iout, u32 min, u32 max, u32 step)
+{
+ int i;
+
+ if (led->iout_joint) {
+ if (iout[FLED1] > min) {
+ iout[FLED1] /= 2;
+ iout[FLED2] = iout[FLED1];
+ } else {
+ iout[FLED1] = min;
+ iout[FLED2] = 0;
+ return;
+ }
+ }
+
+ for (i = FLED1; i <= FLED2; ++i)
+ if (max77693_fled_used(led, i))
+ clamp_align(&iout[i], min, max, step);
+ else
+ iout[i] = 0;
+}
+
+static void max77693_led_validate_configuration(struct max77693_led_device *led,
+ struct max77693_led_config_data *cfg)
+{
+ u32 flash_iout_max = cfg->boost_mode ? FLASH_IOUT_MAX_2LEDS :
+ FLASH_IOUT_MAX_1LED;
+ int i;
+
+ if (cfg->num_leds == 1 &&
+ max77693_fled_used(led, FLED1) && max77693_fled_used(led, FLED2))
+ led->iout_joint = true;
+
+ cfg->boost_mode = clamp_val(cfg->boost_mode, MAX77693_LED_BOOST_NONE,
+ MAX77693_LED_BOOST_FIXED);
+
+ /* Boost must be enabled if both current outputs are used */
+ if ((cfg->boost_mode == MAX77693_LED_BOOST_NONE) && led->iout_joint)
+ cfg->boost_mode = MAX77693_LED_BOOST_FIXED;
+
+ max77693_align_iout_current(led, cfg->iout_torch_max,
+ TORCH_IOUT_MIN, TORCH_IOUT_MAX, TORCH_IOUT_STEP);
+
+ max77693_align_iout_current(led, cfg->iout_flash_max,
+ FLASH_IOUT_MIN, flash_iout_max, FLASH_IOUT_STEP);
+
+ for (i = 0; i < ARRAY_SIZE(cfg->flash_timeout_max); ++i)
+ clamp_align(&cfg->flash_timeout_max[i], FLASH_TIMEOUT_MIN,
+ FLASH_TIMEOUT_MAX, FLASH_TIMEOUT_STEP);
+
+ clamp_align(&cfg->boost_vout, FLASH_VOUT_MIN, FLASH_VOUT_MAX,
+ FLASH_VOUT_STEP);
+
+ if (cfg->low_vsys)
+ clamp_align(&cfg->low_vsys, MAX_FLASH1_VSYS_MIN,
+ MAX_FLASH1_VSYS_MAX, MAX_FLASH1_VSYS_STEP);
+}
+
+static int max77693_led_get_configuration(struct max77693_led_device *led,
+ struct max77693_led_config_data *cfg,
+ struct device_node **sub_nodes)
+{
+ int ret;
+
+ ret = max77693_led_parse_dt(led, cfg, sub_nodes);
+ if (ret < 0)
+ return ret;
+
+ max77693_led_validate_configuration(led, cfg);
+
+ memcpy(led->iout_torch_max, cfg->iout_torch_max,
+ sizeof(led->iout_torch_max));
+ memcpy(led->iout_flash_max, cfg->iout_flash_max,
+ sizeof(led->iout_flash_max));
+
+ return 0;
+}
+
+static const struct led_flash_ops flash_ops = {
+ .flash_brightness_set = max77693_led_flash_brightness_set,
+ .strobe_set = max77693_led_flash_strobe_set,
+ .strobe_get = max77693_led_flash_strobe_get,
+ .timeout_set = max77693_led_flash_timeout_set,
+ .fault_get = max77693_led_flash_fault_get,
+};
+
+static void max77693_init_flash_settings(struct max77693_sub_led *sub_led,
+ struct max77693_led_config_data *led_cfg)
+{
+ struct led_classdev_flash *fled_cdev = &sub_led->fled_cdev;
+ struct max77693_led_device *led = sub_led_to_led(sub_led);
+ int fled_id = sub_led->fled_id;
+ struct led_flash_setting *setting;
+
+ /* Init flash intensity setting */
+ setting = &fled_cdev->brightness;
+ setting->min = FLASH_IOUT_MIN;
+ setting->max = led->iout_joint ?
+ led_cfg->iout_flash_max[FLED1] +
+ led_cfg->iout_flash_max[FLED2] :
+ led_cfg->iout_flash_max[fled_id];
+ setting->step = FLASH_IOUT_STEP;
+ setting->val = setting->max;
+
+ /* Init flash timeout setting */
+ setting = &fled_cdev->timeout;
+ setting->min = FLASH_TIMEOUT_MIN;
+ setting->max = led_cfg->flash_timeout_max[fled_id];
+ setting->step = FLASH_TIMEOUT_STEP;
+ setting->val = setting->max;
+}
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+
+static int max77693_led_external_strobe_set(
+ struct v4l2_flash *v4l2_flash,
+ bool enable)
+{
+ struct max77693_sub_led *sub_led =
+ flcdev_to_sub_led(v4l2_flash->fled_cdev);
+ struct max77693_led_device *led = sub_led_to_led(sub_led);
+ int fled_id = sub_led->fled_id;
+ int ret;
+
+ mutex_lock(&led->lock);
+
+ if (enable)
+ ret = max77693_add_mode(led, MODE_FLASH_EXTERNAL(fled_id));
+ else
+ ret = max77693_clear_mode(led, MODE_FLASH_EXTERNAL(fled_id));
+
+ mutex_unlock(&led->lock);
+
+ return ret;
+}
+
+static void max77693_init_v4l2_flash_config(struct max77693_sub_led *sub_led,
+ struct max77693_led_config_data *led_cfg,
+ struct v4l2_flash_config *v4l2_sd_cfg)
+{
+ struct max77693_led_device *led = sub_led_to_led(sub_led);
+ struct device *dev = &led->pdev->dev;
+ struct max77693_dev *iodev = dev_get_drvdata(dev->parent);
+ struct i2c_client *i2c = iodev->i2c;
+ struct led_flash_setting *s;
+
+ snprintf(v4l2_sd_cfg->dev_name, sizeof(v4l2_sd_cfg->dev_name),
+ "%s %d-%04x", sub_led->fled_cdev.led_cdev.name,
+ i2c_adapter_id(i2c->adapter), i2c->addr);
+
+ s = &v4l2_sd_cfg->intensity;
+ s->min = TORCH_IOUT_MIN;
+ s->max = sub_led->fled_cdev.led_cdev.max_brightness * TORCH_IOUT_STEP;
+ s->step = TORCH_IOUT_STEP;
+ s->val = s->max;
+
+ /* Init flash faults config */
+ v4l2_sd_cfg->flash_faults = LED_FAULT_OVER_VOLTAGE |
+ LED_FAULT_SHORT_CIRCUIT |
+ LED_FAULT_OVER_CURRENT;
+
+ v4l2_sd_cfg->has_external_strobe = true;
+}
+
+static const struct v4l2_flash_ops v4l2_flash_ops = {
+ .external_strobe_set = max77693_led_external_strobe_set,
+};
+#else
+static inline void max77693_init_v4l2_flash_config(
+ struct max77693_sub_led *sub_led,
+ struct max77693_led_config_data *led_cfg,
+ struct v4l2_flash_config *v4l2_sd_cfg)
+{
+}
+static const struct v4l2_flash_ops v4l2_flash_ops;
+#endif
+
+static void max77693_init_fled_cdev(struct max77693_sub_led *sub_led,
+ struct max77693_led_config_data *led_cfg)
+{
+ struct max77693_led_device *led = sub_led_to_led(sub_led);
+ int fled_id = sub_led->fled_id;
+ struct led_classdev_flash *fled_cdev;
+ struct led_classdev *led_cdev;
+
+ /* Initialize LED Flash class device */
+ fled_cdev = &sub_led->fled_cdev;
+ fled_cdev->ops = &flash_ops;
+ led_cdev = &fled_cdev->led_cdev;
+
+ led_cdev->name = led_cfg->label[fled_id];
+
+ led_cdev->brightness_set_blocking = max77693_led_brightness_set;
+ led_cdev->max_brightness = (led->iout_joint ?
+ led_cfg->iout_torch_max[FLED1] +
+ led_cfg->iout_torch_max[FLED2] :
+ led_cfg->iout_torch_max[fled_id]) /
+ TORCH_IOUT_STEP;
+ led_cdev->flags |= LED_DEV_CAP_FLASH;
+
+ max77693_init_flash_settings(sub_led, led_cfg);
+
+ /* Init flash timeout cache */
+ sub_led->flash_timeout = fled_cdev->timeout.val;
+}
+
+static int max77693_register_led(struct max77693_sub_led *sub_led,
+ struct max77693_led_config_data *led_cfg,
+ struct device_node *sub_node)
+{
+ struct max77693_led_device *led = sub_led_to_led(sub_led);
+ struct led_classdev_flash *fled_cdev = &sub_led->fled_cdev;
+ struct device *dev = &led->pdev->dev;
+ struct v4l2_flash_config v4l2_sd_cfg = {};
+ int ret;
+
+ /* Register in the LED subsystem */
+ ret = led_classdev_flash_register(dev, fled_cdev);
+ if (ret < 0)
+ return ret;
+
+ max77693_init_v4l2_flash_config(sub_led, led_cfg, &v4l2_sd_cfg);
+
+ /* Register in the V4L2 subsystem. */
+ sub_led->v4l2_flash = v4l2_flash_init(dev, of_fwnode_handle(sub_node),
+ fled_cdev, &v4l2_flash_ops,
+ &v4l2_sd_cfg);
+ if (IS_ERR(sub_led->v4l2_flash)) {
+ ret = PTR_ERR(sub_led->v4l2_flash);
+ goto err_v4l2_flash_init;
+ }
+
+ return 0;
+
+err_v4l2_flash_init:
+ led_classdev_flash_unregister(fled_cdev);
+ return ret;
+}
+
+static int max77693_led_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct max77693_dev *iodev = dev_get_drvdata(dev->parent);
+ struct max77693_led_device *led;
+ struct max77693_sub_led *sub_leds;
+ struct device_node *sub_nodes[2] = {};
+ struct max77693_led_config_data led_cfg = {};
+ int init_fled_cdev[2], i, ret;
+
+ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->pdev = pdev;
+ led->regmap = iodev->regmap;
+ led->allowed_modes = MODE_FLASH_MASK;
+ sub_leds = led->sub_leds;
+
+ platform_set_drvdata(pdev, led);
+ ret = max77693_led_get_configuration(led, &led_cfg, sub_nodes);
+ if (ret < 0)
+ return ret;
+
+ ret = max77693_setup(led, &led_cfg);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&led->lock);
+
+ init_fled_cdev[FLED1] =
+ led->iout_joint || max77693_fled_used(led, FLED1);
+ init_fled_cdev[FLED2] =
+ !led->iout_joint && max77693_fled_used(led, FLED2);
+
+ for (i = FLED1; i <= FLED2; ++i) {
+ if (!init_fled_cdev[i])
+ continue;
+
+ /* Initialize LED Flash class device */
+ max77693_init_fled_cdev(&sub_leds[i], &led_cfg);
+
+ /*
+ * Register LED Flash class device and corresponding
+ * V4L2 Flash device.
+ */
+ ret = max77693_register_led(&sub_leds[i], &led_cfg,
+ sub_nodes[i]);
+ if (ret < 0) {
+ /*
+ * At this moment FLED1 might have been already
+ * registered and it needs to be released.
+ */
+ if (i == FLED2)
+ goto err_register_led2;
+ else
+ goto err_register_led1;
+ }
+ }
+
+ return 0;
+
+err_register_led2:
+ /* It is possible than only FLED2 was to be registered */
+ if (!init_fled_cdev[FLED1])
+ goto err_register_led1;
+ v4l2_flash_release(sub_leds[FLED1].v4l2_flash);
+ led_classdev_flash_unregister(&sub_leds[FLED1].fled_cdev);
+err_register_led1:
+ mutex_destroy(&led->lock);
+
+ return ret;
+}
+
+static int max77693_led_remove(struct platform_device *pdev)
+{
+ struct max77693_led_device *led = platform_get_drvdata(pdev);
+ struct max77693_sub_led *sub_leds = led->sub_leds;
+
+ if (led->iout_joint || max77693_fled_used(led, FLED1)) {
+ v4l2_flash_release(sub_leds[FLED1].v4l2_flash);
+ led_classdev_flash_unregister(&sub_leds[FLED1].fled_cdev);
+ }
+
+ if (!led->iout_joint && max77693_fled_used(led, FLED2)) {
+ v4l2_flash_release(sub_leds[FLED2].v4l2_flash);
+ led_classdev_flash_unregister(&sub_leds[FLED2].fled_cdev);
+ }
+
+ mutex_destroy(&led->lock);
+
+ return 0;
+}
+
+static const struct of_device_id max77693_led_dt_match[] = {
+ { .compatible = "maxim,max77693-led" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, max77693_led_dt_match);
+
+static struct platform_driver max77693_led_driver = {
+ .probe = max77693_led_probe,
+ .remove = max77693_led_remove,
+ .driver = {
+ .name = "max77693-led",
+ .of_match_table = max77693_led_dt_match,
+ },
+};
+
+module_platform_driver(max77693_led_driver);
+
+MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");
+MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>");
+MODULE_DESCRIPTION("Maxim MAX77693 led flash driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/flash/leds-mt6360.c b/drivers/leds/flash/leds-mt6360.c
new file mode 100644
index 000000000..e1066a52d
--- /dev/null
+++ b/drivers/leds/flash/leds-mt6360.c
@@ -0,0 +1,910 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/led-class-flash.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <media/v4l2-flash-led-class.h>
+
+enum {
+ MT6360_LED_ISNK1 = 0,
+ MT6360_LED_ISNK2,
+ MT6360_LED_ISNK3,
+ MT6360_LED_ISNKML,
+ MT6360_LED_FLASH1,
+ MT6360_LED_FLASH2,
+ MT6360_MAX_LEDS
+};
+
+#define MT6360_REG_RGBEN 0x380
+#define MT6360_REG_ISNK(_led_no) (0x381 + (_led_no))
+#define MT6360_ISNK_ENMASK(_led_no) BIT(7 - (_led_no))
+#define MT6360_ISNK_MASK GENMASK(4, 0)
+#define MT6360_CHRINDSEL_MASK BIT(3)
+
+/* Virtual definition for multicolor */
+#define MT6360_VIRTUAL_MULTICOLOR (MT6360_MAX_LEDS + 1)
+#define MULTICOLOR_NUM_CHANNELS 3
+
+#define MT6360_REG_FLEDEN 0x37E
+#define MT6360_REG_STRBTO 0x373
+#define MT6360_REG_FLEDBASE(_id) (0x372 + 4 * (_id - MT6360_LED_FLASH1))
+#define MT6360_REG_FLEDISTRB(_id) (MT6360_REG_FLEDBASE(_id) + 2)
+#define MT6360_REG_FLEDITOR(_id) (MT6360_REG_FLEDBASE(_id) + 3)
+#define MT6360_REG_CHGSTAT2 0x3E1
+#define MT6360_REG_FLEDSTAT1 0x3E9
+#define MT6360_ITORCH_MASK GENMASK(4, 0)
+#define MT6360_ISTROBE_MASK GENMASK(6, 0)
+#define MT6360_STRBTO_MASK GENMASK(6, 0)
+#define MT6360_TORCHEN_MASK BIT(3)
+#define MT6360_STROBEN_MASK BIT(2)
+#define MT6360_FLCSEN_MASK(_id) BIT(MT6360_LED_FLASH2 - _id)
+#define MT6360_FLEDCHGVINOVP_MASK BIT(3)
+#define MT6360_FLED1STRBTO_MASK BIT(11)
+#define MT6360_FLED2STRBTO_MASK BIT(10)
+#define MT6360_FLED1STRB_MASK BIT(9)
+#define MT6360_FLED2STRB_MASK BIT(8)
+#define MT6360_FLED1SHORT_MASK BIT(7)
+#define MT6360_FLED2SHORT_MASK BIT(6)
+#define MT6360_FLEDLVF_MASK BIT(3)
+
+#define MT6360_ISNKRGB_STEPUA 2000
+#define MT6360_ISNKRGB_MAXUA 24000
+#define MT6360_ISNKML_STEPUA 5000
+#define MT6360_ISNKML_MAXUA 150000
+
+#define MT6360_ITORCH_MINUA 25000
+#define MT6360_ITORCH_STEPUA 12500
+#define MT6360_ITORCH_MAXUA 400000
+#define MT6360_ISTRB_MINUA 50000
+#define MT6360_ISTRB_STEPUA 12500
+#define MT6360_ISTRB_MAXUA 1500000
+#define MT6360_STRBTO_MINUS 64000
+#define MT6360_STRBTO_STEPUS 32000
+#define MT6360_STRBTO_MAXUS 2432000
+
+#define STATE_OFF 0
+#define STATE_KEEP 1
+#define STATE_ON 2
+
+struct mt6360_led {
+ union {
+ struct led_classdev isnk;
+ struct led_classdev_mc mc;
+ struct led_classdev_flash flash;
+ };
+ struct v4l2_flash *v4l2_flash;
+ struct mt6360_priv *priv;
+ u32 led_no;
+ u32 default_state;
+};
+
+struct mt6360_priv {
+ struct device *dev;
+ struct regmap *regmap;
+ struct mutex lock;
+ unsigned int fled_strobe_used;
+ unsigned int fled_torch_used;
+ unsigned int leds_active;
+ unsigned int leds_count;
+ struct mt6360_led leds[];
+};
+
+static int mt6360_mc_brightness_set(struct led_classdev *lcdev,
+ enum led_brightness level)
+{
+ struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+ struct mt6360_led *led = container_of(mccdev, struct mt6360_led, mc);
+ struct mt6360_priv *priv = led->priv;
+ u32 real_bright, enable_mask = 0, enable = 0;
+ int i, ret;
+
+ mutex_lock(&priv->lock);
+
+ led_mc_calc_color_components(mccdev, level);
+
+ for (i = 0; i < mccdev->num_colors; i++) {
+ struct mc_subled *subled = mccdev->subled_info + i;
+
+ real_bright = min(lcdev->max_brightness, subled->brightness);
+ ret = regmap_update_bits(priv->regmap, MT6360_REG_ISNK(i),
+ MT6360_ISNK_MASK, real_bright);
+ if (ret)
+ goto out;
+
+ enable_mask |= MT6360_ISNK_ENMASK(subled->channel);
+ if (real_bright)
+ enable |= MT6360_ISNK_ENMASK(subled->channel);
+ }
+
+ ret = regmap_update_bits(priv->regmap, MT6360_REG_RGBEN, enable_mask,
+ enable);
+
+out:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static int mt6360_isnk_brightness_set(struct led_classdev *lcdev,
+ enum led_brightness level)
+{
+ struct mt6360_led *led = container_of(lcdev, struct mt6360_led, isnk);
+ struct mt6360_priv *priv = led->priv;
+ u32 enable_mask = MT6360_ISNK_ENMASK(led->led_no);
+ u32 val = level ? MT6360_ISNK_ENMASK(led->led_no) : 0;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = regmap_update_bits(priv->regmap, MT6360_REG_ISNK(led->led_no),
+ MT6360_ISNK_MASK, level);
+ if (ret)
+ goto out;
+
+ ret = regmap_update_bits(priv->regmap, MT6360_REG_RGBEN, enable_mask,
+ val);
+
+out:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static int mt6360_torch_brightness_set(struct led_classdev *lcdev,
+ enum led_brightness level)
+{
+ struct mt6360_led *led =
+ container_of(lcdev, struct mt6360_led, flash.led_cdev);
+ struct mt6360_priv *priv = led->priv;
+ u32 enable_mask = MT6360_TORCHEN_MASK | MT6360_FLCSEN_MASK(led->led_no);
+ u32 val = level ? MT6360_FLCSEN_MASK(led->led_no) : 0;
+ u32 prev = priv->fled_torch_used, curr;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ /*
+ * Only one set of flash control logic, use the flag to avoid strobe is
+ * currently used.
+ */
+ if (priv->fled_strobe_used) {
+ dev_warn(lcdev->dev, "Please disable strobe first [%d]\n",
+ priv->fled_strobe_used);
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ if (level)
+ curr = prev | BIT(led->led_no);
+ else
+ curr = prev & ~BIT(led->led_no);
+
+ if (curr)
+ val |= MT6360_TORCHEN_MASK;
+
+ if (level) {
+ ret = regmap_update_bits(priv->regmap,
+ MT6360_REG_FLEDITOR(led->led_no),
+ MT6360_ITORCH_MASK, level - 1);
+ if (ret)
+ goto unlock;
+ }
+
+ ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, enable_mask,
+ val);
+ if (ret)
+ goto unlock;
+
+ priv->fled_torch_used = curr;
+
+unlock:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static int mt6360_flash_brightness_set(struct led_classdev_flash *fl_cdev,
+ u32 brightness)
+{
+ /*
+ * Due to the current spike when turning on flash, let brightness to be
+ * kept by framework.
+ * This empty function is used to prevent led_classdev_flash register
+ * ops check failure.
+ */
+ return 0;
+}
+
+static int _mt6360_flash_brightness_set(struct led_classdev_flash *fl_cdev,
+ u32 brightness)
+{
+ struct mt6360_led *led =
+ container_of(fl_cdev, struct mt6360_led, flash);
+ struct mt6360_priv *priv = led->priv;
+ struct led_flash_setting *s = &fl_cdev->brightness;
+ u32 val = (brightness - s->min) / s->step;
+
+ return regmap_update_bits(priv->regmap,
+ MT6360_REG_FLEDISTRB(led->led_no),
+ MT6360_ISTROBE_MASK, val);
+}
+
+static int mt6360_strobe_set(struct led_classdev_flash *fl_cdev, bool state)
+{
+ struct mt6360_led *led =
+ container_of(fl_cdev, struct mt6360_led, flash);
+ struct mt6360_priv *priv = led->priv;
+ struct led_classdev *lcdev = &fl_cdev->led_cdev;
+ struct led_flash_setting *s = &fl_cdev->brightness;
+ u32 enable_mask = MT6360_STROBEN_MASK | MT6360_FLCSEN_MASK(led->led_no);
+ u32 val = state ? MT6360_FLCSEN_MASK(led->led_no) : 0;
+ u32 prev = priv->fled_strobe_used, curr;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ /*
+ * Only one set of flash control logic, use the flag to avoid torch is
+ * currently used
+ */
+ if (priv->fled_torch_used) {
+ dev_warn(lcdev->dev, "Please disable torch first [0x%x]\n",
+ priv->fled_torch_used);
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ if (state)
+ curr = prev | BIT(led->led_no);
+ else
+ curr = prev & ~BIT(led->led_no);
+
+ if (curr)
+ val |= MT6360_STROBEN_MASK;
+
+ ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, enable_mask,
+ val);
+ if (ret) {
+ dev_err(lcdev->dev, "[%d] control current source %d fail\n",
+ led->led_no, state);
+ goto unlock;
+ }
+
+ /*
+ * If the flash need to be on, config the flash current ramping up to
+ * the setting value.
+ * Else, always recover back to the minimum one
+ */
+ ret = _mt6360_flash_brightness_set(fl_cdev, state ? s->val : s->min);
+ if (ret)
+ goto unlock;
+
+ /*
+ * For the flash turn on/off, HW rampping up/down time is 5ms/500us,
+ * respectively.
+ */
+ if (!prev && curr)
+ usleep_range(5000, 6000);
+ else if (prev && !curr)
+ udelay(500);
+
+ priv->fled_strobe_used = curr;
+
+unlock:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static int mt6360_strobe_get(struct led_classdev_flash *fl_cdev, bool *state)
+{
+ struct mt6360_led *led =
+ container_of(fl_cdev, struct mt6360_led, flash);
+ struct mt6360_priv *priv = led->priv;
+
+ mutex_lock(&priv->lock);
+ *state = !!(priv->fled_strobe_used & BIT(led->led_no));
+ mutex_unlock(&priv->lock);
+
+ return 0;
+}
+
+static int mt6360_timeout_set(struct led_classdev_flash *fl_cdev, u32 timeout)
+{
+ struct mt6360_led *led =
+ container_of(fl_cdev, struct mt6360_led, flash);
+ struct mt6360_priv *priv = led->priv;
+ struct led_flash_setting *s = &fl_cdev->timeout;
+ u32 val = (timeout - s->min) / s->step;
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = regmap_update_bits(priv->regmap, MT6360_REG_STRBTO,
+ MT6360_STRBTO_MASK, val);
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int mt6360_fault_get(struct led_classdev_flash *fl_cdev, u32 *fault)
+{
+ struct mt6360_led *led =
+ container_of(fl_cdev, struct mt6360_led, flash);
+ struct mt6360_priv *priv = led->priv;
+ u16 fled_stat;
+ unsigned int chg_stat, strobe_timeout_mask, fled_short_mask;
+ u32 rfault = 0;
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = regmap_read(priv->regmap, MT6360_REG_CHGSTAT2, &chg_stat);
+ if (ret)
+ goto unlock;
+
+ ret = regmap_raw_read(priv->regmap, MT6360_REG_FLEDSTAT1, &fled_stat,
+ sizeof(fled_stat));
+ if (ret)
+ goto unlock;
+
+ if (led->led_no == MT6360_LED_FLASH1) {
+ strobe_timeout_mask = MT6360_FLED1STRBTO_MASK;
+ fled_short_mask = MT6360_FLED1SHORT_MASK;
+ } else {
+ strobe_timeout_mask = MT6360_FLED2STRBTO_MASK;
+ fled_short_mask = MT6360_FLED2SHORT_MASK;
+ }
+
+ if (chg_stat & MT6360_FLEDCHGVINOVP_MASK)
+ rfault |= LED_FAULT_INPUT_VOLTAGE;
+
+ if (fled_stat & strobe_timeout_mask)
+ rfault |= LED_FAULT_TIMEOUT;
+
+ if (fled_stat & fled_short_mask)
+ rfault |= LED_FAULT_SHORT_CIRCUIT;
+
+ if (fled_stat & MT6360_FLEDLVF_MASK)
+ rfault |= LED_FAULT_UNDER_VOLTAGE;
+
+ *fault = rfault;
+unlock:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static const struct led_flash_ops mt6360_flash_ops = {
+ .flash_brightness_set = mt6360_flash_brightness_set,
+ .strobe_set = mt6360_strobe_set,
+ .strobe_get = mt6360_strobe_get,
+ .timeout_set = mt6360_timeout_set,
+ .fault_get = mt6360_fault_get,
+};
+
+static int mt6360_isnk_init_default_state(struct mt6360_led *led)
+{
+ struct mt6360_priv *priv = led->priv;
+ unsigned int regval;
+ u32 level;
+ int ret;
+
+ ret = regmap_read(priv->regmap, MT6360_REG_ISNK(led->led_no), &regval);
+ if (ret)
+ return ret;
+ level = regval & MT6360_ISNK_MASK;
+
+ ret = regmap_read(priv->regmap, MT6360_REG_RGBEN, &regval);
+ if (ret)
+ return ret;
+
+ if (!(regval & MT6360_ISNK_ENMASK(led->led_no)))
+ level = LED_OFF;
+
+ switch (led->default_state) {
+ case STATE_ON:
+ led->isnk.brightness = led->isnk.max_brightness;
+ break;
+ case STATE_KEEP:
+ led->isnk.brightness = min(level, led->isnk.max_brightness);
+ break;
+ default:
+ led->isnk.brightness = LED_OFF;
+ }
+
+ return mt6360_isnk_brightness_set(&led->isnk, led->isnk.brightness);
+}
+
+static int mt6360_flash_init_default_state(struct mt6360_led *led)
+{
+ struct led_classdev_flash *flash = &led->flash;
+ struct mt6360_priv *priv = led->priv;
+ u32 enable_mask = MT6360_TORCHEN_MASK | MT6360_FLCSEN_MASK(led->led_no);
+ u32 level;
+ unsigned int regval;
+ int ret;
+
+ ret = regmap_read(priv->regmap, MT6360_REG_FLEDITOR(led->led_no),
+ &regval);
+ if (ret)
+ return ret;
+ level = regval & MT6360_ITORCH_MASK;
+
+ ret = regmap_read(priv->regmap, MT6360_REG_FLEDEN, &regval);
+ if (ret)
+ return ret;
+
+ if ((regval & enable_mask) == enable_mask)
+ level += 1;
+ else
+ level = LED_OFF;
+
+ switch (led->default_state) {
+ case STATE_ON:
+ flash->led_cdev.brightness = flash->led_cdev.max_brightness;
+ break;
+ case STATE_KEEP:
+ flash->led_cdev.brightness =
+ min(level, flash->led_cdev.max_brightness);
+ break;
+ default:
+ flash->led_cdev.brightness = LED_OFF;
+ }
+
+ return mt6360_torch_brightness_set(&flash->led_cdev,
+ flash->led_cdev.brightness);
+}
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+static int mt6360_flash_external_strobe_set(struct v4l2_flash *v4l2_flash,
+ bool enable)
+{
+ struct led_classdev_flash *flash = v4l2_flash->fled_cdev;
+ struct mt6360_led *led = container_of(flash, struct mt6360_led, flash);
+ struct mt6360_priv *priv = led->priv;
+ u32 mask = MT6360_FLCSEN_MASK(led->led_no);
+ u32 val = enable ? mask : 0;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, mask, val);
+ if (ret)
+ goto unlock;
+
+ if (enable)
+ priv->fled_strobe_used |= BIT(led->led_no);
+ else
+ priv->fled_strobe_used &= ~BIT(led->led_no);
+
+unlock:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static const struct v4l2_flash_ops v4l2_flash_ops = {
+ .external_strobe_set = mt6360_flash_external_strobe_set,
+};
+
+static void mt6360_init_v4l2_flash_config(struct mt6360_led *led,
+ struct v4l2_flash_config *config)
+{
+ struct led_classdev *lcdev;
+ struct led_flash_setting *s = &config->intensity;
+
+ lcdev = &led->flash.led_cdev;
+
+ s->min = MT6360_ITORCH_MINUA;
+ s->step = MT6360_ITORCH_STEPUA;
+ s->val = s->max = s->min + (lcdev->max_brightness - 1) * s->step;
+
+ config->has_external_strobe = 1;
+ strscpy(config->dev_name, lcdev->dev->kobj.name,
+ sizeof(config->dev_name));
+
+ config->flash_faults = LED_FAULT_SHORT_CIRCUIT | LED_FAULT_TIMEOUT |
+ LED_FAULT_INPUT_VOLTAGE |
+ LED_FAULT_UNDER_VOLTAGE;
+}
+#else
+static const struct v4l2_flash_ops v4l2_flash_ops;
+static void mt6360_init_v4l2_flash_config(struct mt6360_led *led,
+ struct v4l2_flash_config *config)
+{
+}
+#endif
+
+static int mt6360_led_register(struct device *parent, struct mt6360_led *led,
+ struct led_init_data *init_data)
+{
+ struct mt6360_priv *priv = led->priv;
+ struct v4l2_flash_config v4l2_config = {0};
+ int ret;
+
+ if ((led->led_no == MT6360_LED_ISNK1 ||
+ led->led_no == MT6360_VIRTUAL_MULTICOLOR) &&
+ (priv->leds_active & BIT(MT6360_LED_ISNK1))) {
+ /*
+ * Change isink1 to SW control mode, disconnect it with
+ * charger state
+ */
+ ret = regmap_update_bits(priv->regmap, MT6360_REG_RGBEN,
+ MT6360_CHRINDSEL_MASK,
+ MT6360_CHRINDSEL_MASK);
+ if (ret) {
+ dev_err(parent, "Failed to config ISNK1 to SW mode\n");
+ return ret;
+ }
+ }
+
+ switch (led->led_no) {
+ case MT6360_VIRTUAL_MULTICOLOR:
+ ret = mt6360_mc_brightness_set(&led->mc.led_cdev, LED_OFF);
+ if (ret) {
+ dev_err(parent,
+ "Failed to init multicolor brightness\n");
+ return ret;
+ }
+
+ ret = devm_led_classdev_multicolor_register_ext(parent,
+ &led->mc, init_data);
+ if (ret) {
+ dev_err(parent, "Couldn't register multicolor\n");
+ return ret;
+ }
+ break;
+ case MT6360_LED_ISNK1 ... MT6360_LED_ISNKML:
+ ret = mt6360_isnk_init_default_state(led);
+ if (ret) {
+ dev_err(parent, "Failed to init %d isnk state\n",
+ led->led_no);
+ return ret;
+ }
+
+ ret = devm_led_classdev_register_ext(parent, &led->isnk,
+ init_data);
+ if (ret) {
+ dev_err(parent, "Couldn't register isink %d\n",
+ led->led_no);
+ return ret;
+ }
+ break;
+ default:
+ ret = mt6360_flash_init_default_state(led);
+ if (ret) {
+ dev_err(parent, "Failed to init %d flash state\n",
+ led->led_no);
+ return ret;
+ }
+
+ ret = devm_led_classdev_flash_register_ext(parent, &led->flash,
+ init_data);
+ if (ret) {
+ dev_err(parent, "Couldn't register flash %d\n",
+ led->led_no);
+ return ret;
+ }
+
+ mt6360_init_v4l2_flash_config(led, &v4l2_config);
+ led->v4l2_flash = v4l2_flash_init(parent, init_data->fwnode,
+ &led->flash,
+ &v4l2_flash_ops,
+ &v4l2_config);
+ if (IS_ERR(led->v4l2_flash)) {
+ dev_err(parent, "Failed to register %d v4l2 sd\n",
+ led->led_no);
+ return PTR_ERR(led->v4l2_flash);
+ }
+ }
+
+ return 0;
+}
+
+static u32 clamp_align(u32 val, u32 min, u32 max, u32 step)
+{
+ u32 retval;
+
+ retval = clamp_val(val, min, max);
+ if (step > 1)
+ retval = rounddown(retval - min, step) + min;
+
+ return retval;
+}
+
+static int mt6360_init_isnk_properties(struct mt6360_led *led,
+ struct led_init_data *init_data)
+{
+ struct led_classdev *lcdev;
+ struct mt6360_priv *priv = led->priv;
+ struct fwnode_handle *child;
+ u32 step_uA = MT6360_ISNKRGB_STEPUA, max_uA = MT6360_ISNKRGB_MAXUA;
+ u32 val;
+ int num_color = 0, ret;
+
+ if (led->led_no == MT6360_VIRTUAL_MULTICOLOR) {
+ struct mc_subled *sub_led;
+
+ sub_led = devm_kzalloc(priv->dev,
+ sizeof(*sub_led) * MULTICOLOR_NUM_CHANNELS, GFP_KERNEL);
+ if (!sub_led)
+ return -ENOMEM;
+
+ fwnode_for_each_child_node(init_data->fwnode, child) {
+ u32 reg, color;
+
+ ret = fwnode_property_read_u32(child, "reg", &reg);
+ if (ret || reg > MT6360_LED_ISNK3 ||
+ priv->leds_active & BIT(reg))
+ return -EINVAL;
+
+ ret = fwnode_property_read_u32(child, "color", &color);
+ if (ret) {
+ dev_err(priv->dev,
+ "led %d, no color specified\n",
+ led->led_no);
+ return ret;
+ }
+
+ priv->leds_active |= BIT(reg);
+ sub_led[num_color].color_index = color;
+ sub_led[num_color].channel = reg;
+ num_color++;
+ }
+
+ if (num_color < 2) {
+ dev_err(priv->dev,
+ "Multicolor must include 2 or more led channel\n");
+ return -EINVAL;
+ }
+
+ led->mc.num_colors = num_color;
+ led->mc.subled_info = sub_led;
+
+ lcdev = &led->mc.led_cdev;
+ lcdev->brightness_set_blocking = mt6360_mc_brightness_set;
+ } else {
+ if (led->led_no == MT6360_LED_ISNKML) {
+ step_uA = MT6360_ISNKML_STEPUA;
+ max_uA = MT6360_ISNKML_MAXUA;
+ }
+
+ lcdev = &led->isnk;
+ lcdev->brightness_set_blocking = mt6360_isnk_brightness_set;
+ }
+
+ ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp",
+ &val);
+ if (ret) {
+ dev_warn(priv->dev,
+ "Not specified led-max-microamp, config to the minimum\n");
+ val = step_uA;
+ } else
+ val = clamp_align(val, 0, max_uA, step_uA);
+
+ lcdev->max_brightness = val / step_uA;
+
+ fwnode_property_read_string(init_data->fwnode, "linux,default-trigger",
+ &lcdev->default_trigger);
+
+ return 0;
+}
+
+static int mt6360_init_flash_properties(struct mt6360_led *led,
+ struct led_init_data *init_data)
+{
+ struct led_classdev_flash *flash = &led->flash;
+ struct led_classdev *lcdev = &flash->led_cdev;
+ struct mt6360_priv *priv = led->priv;
+ struct led_flash_setting *s;
+ u32 val;
+ int ret;
+
+ ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp",
+ &val);
+ if (ret) {
+ dev_warn(priv->dev,
+ "Not specified led-max-microamp, config to the minimum\n");
+ val = MT6360_ITORCH_MINUA;
+ } else
+ val = clamp_align(val, MT6360_ITORCH_MINUA, MT6360_ITORCH_MAXUA,
+ MT6360_ITORCH_STEPUA);
+
+ lcdev->max_brightness =
+ (val - MT6360_ITORCH_MINUA) / MT6360_ITORCH_STEPUA + 1;
+ lcdev->brightness_set_blocking = mt6360_torch_brightness_set;
+ lcdev->flags |= LED_DEV_CAP_FLASH;
+
+ ret = fwnode_property_read_u32(init_data->fwnode, "flash-max-microamp",
+ &val);
+ if (ret) {
+ dev_warn(priv->dev,
+ "Not specified flash-max-microamp, config to the minimum\n");
+ val = MT6360_ISTRB_MINUA;
+ } else
+ val = clamp_align(val, MT6360_ISTRB_MINUA, MT6360_ISTRB_MAXUA,
+ MT6360_ISTRB_STEPUA);
+
+ s = &flash->brightness;
+ s->min = MT6360_ISTRB_MINUA;
+ s->step = MT6360_ISTRB_STEPUA;
+ s->val = s->max = val;
+
+ /*
+ * Always configure as min level when off to prevent flash current
+ * spike.
+ */
+ ret = _mt6360_flash_brightness_set(flash, s->min);
+ if (ret)
+ return ret;
+
+ ret = fwnode_property_read_u32(init_data->fwnode,
+ "flash-max-timeout-us", &val);
+ if (ret) {
+ dev_warn(priv->dev,
+ "Not specified flash-max-timeout-us, config to the minimum\n");
+ val = MT6360_STRBTO_MINUS;
+ } else
+ val = clamp_align(val, MT6360_STRBTO_MINUS, MT6360_STRBTO_MAXUS,
+ MT6360_STRBTO_STEPUS);
+
+ s = &flash->timeout;
+ s->min = MT6360_STRBTO_MINUS;
+ s->step = MT6360_STRBTO_STEPUS;
+ s->val = s->max = val;
+
+ flash->ops = &mt6360_flash_ops;
+
+ return 0;
+}
+
+static int mt6360_init_common_properties(struct mt6360_led *led,
+ struct led_init_data *init_data)
+{
+ const char *const states[] = { "off", "keep", "on" };
+ const char *str;
+ int ret;
+
+ if (!fwnode_property_read_string(init_data->fwnode,
+ "default-state", &str)) {
+ ret = match_string(states, ARRAY_SIZE(states), str);
+ if (ret < 0)
+ ret = STATE_OFF;
+
+ led->default_state = ret;
+ }
+
+ return 0;
+}
+
+static void mt6360_v4l2_flash_release(struct mt6360_priv *priv)
+{
+ int i;
+
+ for (i = 0; i < priv->leds_count; i++) {
+ struct mt6360_led *led = priv->leds + i;
+
+ if (led->v4l2_flash)
+ v4l2_flash_release(led->v4l2_flash);
+ }
+}
+
+static int mt6360_led_probe(struct platform_device *pdev)
+{
+ struct mt6360_priv *priv;
+ struct fwnode_handle *child;
+ size_t count;
+ int i = 0, ret;
+
+ count = device_get_child_node_count(&pdev->dev);
+ if (!count || count > MT6360_MAX_LEDS) {
+ dev_err(&pdev->dev,
+ "No child node or node count over max led number %zu\n",
+ count);
+ return -EINVAL;
+ }
+
+ priv = devm_kzalloc(&pdev->dev,
+ struct_size(priv, leds, count), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->leds_count = count;
+ priv->dev = &pdev->dev;
+ mutex_init(&priv->lock);
+
+ priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!priv->regmap) {
+ dev_err(&pdev->dev, "Failed to get parent regmap\n");
+ return -ENODEV;
+ }
+
+ device_for_each_child_node(&pdev->dev, child) {
+ struct mt6360_led *led = priv->leds + i;
+ struct led_init_data init_data = { .fwnode = child, };
+ u32 reg, led_color;
+
+ ret = fwnode_property_read_u32(child, "color", &led_color);
+ if (ret)
+ goto out_flash_release;
+
+ if (led_color == LED_COLOR_ID_RGB ||
+ led_color == LED_COLOR_ID_MULTI)
+ reg = MT6360_VIRTUAL_MULTICOLOR;
+ else {
+ ret = fwnode_property_read_u32(child, "reg", &reg);
+ if (ret)
+ goto out_flash_release;
+
+ if (reg >= MT6360_MAX_LEDS) {
+ ret = -EINVAL;
+ goto out_flash_release;
+ }
+ }
+
+ if (priv->leds_active & BIT(reg)) {
+ ret = -EINVAL;
+ goto out_flash_release;
+ }
+ priv->leds_active |= BIT(reg);
+
+ led->led_no = reg;
+ led->priv = priv;
+
+ ret = mt6360_init_common_properties(led, &init_data);
+ if (ret)
+ goto out_flash_release;
+
+ if (reg == MT6360_VIRTUAL_MULTICOLOR ||
+ reg <= MT6360_LED_ISNKML)
+ ret = mt6360_init_isnk_properties(led, &init_data);
+ else
+ ret = mt6360_init_flash_properties(led, &init_data);
+
+ if (ret)
+ goto out_flash_release;
+
+ ret = mt6360_led_register(&pdev->dev, led, &init_data);
+ if (ret)
+ goto out_flash_release;
+
+ i++;
+ }
+
+ platform_set_drvdata(pdev, priv);
+ return 0;
+
+out_flash_release:
+ mt6360_v4l2_flash_release(priv);
+ return ret;
+}
+
+static int mt6360_led_remove(struct platform_device *pdev)
+{
+ struct mt6360_priv *priv = platform_get_drvdata(pdev);
+
+ mt6360_v4l2_flash_release(priv);
+ return 0;
+}
+
+static const struct of_device_id __maybe_unused mt6360_led_of_id[] = {
+ { .compatible = "mediatek,mt6360-led", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mt6360_led_of_id);
+
+static struct platform_driver mt6360_led_driver = {
+ .driver = {
+ .name = "mt6360-led",
+ .of_match_table = mt6360_led_of_id,
+ },
+ .probe = mt6360_led_probe,
+ .remove = mt6360_led_remove,
+};
+module_platform_driver(mt6360_led_driver);
+
+MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>");
+MODULE_DESCRIPTION("MT6360 LED Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/flash/leds-rt4505.c b/drivers/leds/flash/leds-rt4505.c
new file mode 100644
index 000000000..e404fe8b0
--- /dev/null
+++ b/drivers/leds/flash/leds-rt4505.c
@@ -0,0 +1,429 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/bitops.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/led-class-flash.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <media/v4l2-flash-led-class.h>
+
+#define RT4505_REG_RESET 0x0
+#define RT4505_REG_CONFIG 0x8
+#define RT4505_REG_ILED 0x9
+#define RT4505_REG_ENABLE 0xA
+#define RT4505_REG_FLAGS 0xB
+
+#define RT4505_RESET_MASK BIT(7)
+#define RT4505_FLASHTO_MASK GENMASK(2, 0)
+#define RT4505_ITORCH_MASK GENMASK(7, 5)
+#define RT4505_ITORCH_SHIFT 5
+#define RT4505_IFLASH_MASK GENMASK(4, 0)
+#define RT4505_ENABLE_MASK GENMASK(5, 0)
+#define RT4505_TORCH_SET (BIT(0) | BIT(4))
+#define RT4505_FLASH_SET (BIT(0) | BIT(1) | BIT(2) | BIT(4))
+#define RT4505_EXT_FLASH_SET (BIT(0) | BIT(1) | BIT(4) | BIT(5))
+#define RT4505_FLASH_GET (BIT(0) | BIT(1) | BIT(4))
+#define RT4505_OVP_MASK BIT(3)
+#define RT4505_SHORT_MASK BIT(2)
+#define RT4505_OTP_MASK BIT(1)
+#define RT4505_TIMEOUT_MASK BIT(0)
+
+#define RT4505_ITORCH_MINUA 46000
+#define RT4505_ITORCH_MAXUA 375000
+#define RT4505_ITORCH_STPUA 47000
+#define RT4505_IFLASH_MINUA 93750
+#define RT4505_IFLASH_MAXUA 1500000
+#define RT4505_IFLASH_STPUA 93750
+#define RT4505_FLASHTO_MINUS 100000
+#define RT4505_FLASHTO_MAXUS 800000
+#define RT4505_FLASHTO_STPUS 100000
+
+struct rt4505_priv {
+ struct device *dev;
+ struct regmap *regmap;
+ struct mutex lock;
+ struct led_classdev_flash flash;
+ struct v4l2_flash *v4l2_flash;
+};
+
+static int rt4505_torch_brightness_set(struct led_classdev *lcdev,
+ enum led_brightness level)
+{
+ struct rt4505_priv *priv =
+ container_of(lcdev, struct rt4505_priv, flash.led_cdev);
+ u32 val = 0;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ if (level != LED_OFF) {
+ ret = regmap_update_bits(priv->regmap,
+ RT4505_REG_ILED, RT4505_ITORCH_MASK,
+ (level - 1) << RT4505_ITORCH_SHIFT);
+ if (ret)
+ goto unlock;
+
+ val = RT4505_TORCH_SET;
+ }
+
+ ret = regmap_update_bits(priv->regmap, RT4505_REG_ENABLE,
+ RT4505_ENABLE_MASK, val);
+
+unlock:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static enum led_brightness rt4505_torch_brightness_get(
+ struct led_classdev *lcdev)
+{
+ struct rt4505_priv *priv =
+ container_of(lcdev, struct rt4505_priv, flash.led_cdev);
+ u32 val;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = regmap_read(priv->regmap, RT4505_REG_ENABLE, &val);
+ if (ret) {
+ dev_err(lcdev->dev, "Failed to get LED enable\n");
+ ret = LED_OFF;
+ goto unlock;
+ }
+
+ if ((val & RT4505_ENABLE_MASK) != RT4505_TORCH_SET) {
+ ret = LED_OFF;
+ goto unlock;
+ }
+
+ ret = regmap_read(priv->regmap, RT4505_REG_ILED, &val);
+ if (ret) {
+ dev_err(lcdev->dev, "Failed to get LED brightness\n");
+ ret = LED_OFF;
+ goto unlock;
+ }
+
+ ret = ((val & RT4505_ITORCH_MASK) >> RT4505_ITORCH_SHIFT) + 1;
+
+unlock:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static int rt4505_flash_brightness_set(struct led_classdev_flash *fled_cdev,
+ u32 brightness)
+{
+ struct rt4505_priv *priv =
+ container_of(fled_cdev, struct rt4505_priv, flash);
+ struct led_flash_setting *s = &fled_cdev->brightness;
+ u32 val = (brightness - s->min) / s->step;
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = regmap_update_bits(priv->regmap, RT4505_REG_ILED,
+ RT4505_IFLASH_MASK, val);
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int rt4505_flash_strobe_set(struct led_classdev_flash *fled_cdev,
+ bool state)
+{
+ struct rt4505_priv *priv =
+ container_of(fled_cdev, struct rt4505_priv, flash);
+ u32 val = state ? RT4505_FLASH_SET : 0;
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = regmap_update_bits(priv->regmap, RT4505_REG_ENABLE,
+ RT4505_ENABLE_MASK, val);
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int rt4505_flash_strobe_get(struct led_classdev_flash *fled_cdev,
+ bool *state)
+{
+ struct rt4505_priv *priv =
+ container_of(fled_cdev, struct rt4505_priv, flash);
+ u32 val;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = regmap_read(priv->regmap, RT4505_REG_ENABLE, &val);
+ if (ret)
+ goto unlock;
+
+ *state = (val & RT4505_FLASH_GET) == RT4505_FLASH_GET;
+
+unlock:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static int rt4505_flash_timeout_set(struct led_classdev_flash *fled_cdev,
+ u32 timeout)
+{
+ struct rt4505_priv *priv =
+ container_of(fled_cdev, struct rt4505_priv, flash);
+ struct led_flash_setting *s = &fled_cdev->timeout;
+ u32 val = (timeout - s->min) / s->step;
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = regmap_update_bits(priv->regmap, RT4505_REG_CONFIG,
+ RT4505_FLASHTO_MASK, val);
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int rt4505_fault_get(struct led_classdev_flash *fled_cdev, u32 *fault)
+{
+ struct rt4505_priv *priv =
+ container_of(fled_cdev, struct rt4505_priv, flash);
+ u32 val, led_faults = 0;
+ int ret;
+
+ ret = regmap_read(priv->regmap, RT4505_REG_FLAGS, &val);
+ if (ret)
+ return ret;
+
+ if (val & RT4505_OVP_MASK)
+ led_faults |= LED_FAULT_OVER_VOLTAGE;
+
+ if (val & RT4505_SHORT_MASK)
+ led_faults |= LED_FAULT_SHORT_CIRCUIT;
+
+ if (val & RT4505_OTP_MASK)
+ led_faults |= LED_FAULT_OVER_TEMPERATURE;
+
+ if (val & RT4505_TIMEOUT_MASK)
+ led_faults |= LED_FAULT_TIMEOUT;
+
+ *fault = led_faults;
+ return 0;
+}
+
+static const struct led_flash_ops rt4505_flash_ops = {
+ .flash_brightness_set = rt4505_flash_brightness_set,
+ .strobe_set = rt4505_flash_strobe_set,
+ .strobe_get = rt4505_flash_strobe_get,
+ .timeout_set = rt4505_flash_timeout_set,
+ .fault_get = rt4505_fault_get,
+};
+
+static bool rt4505_is_accessible_reg(struct device *dev, unsigned int reg)
+{
+ if (reg == RT4505_REG_RESET ||
+ (reg >= RT4505_REG_CONFIG && reg <= RT4505_REG_FLAGS))
+ return true;
+ return false;
+}
+
+static const struct regmap_config rt4505_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = RT4505_REG_FLAGS,
+
+ .readable_reg = rt4505_is_accessible_reg,
+ .writeable_reg = rt4505_is_accessible_reg,
+};
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+static int rt4505_flash_external_strobe_set(struct v4l2_flash *v4l2_flash,
+ bool enable)
+{
+ struct led_classdev_flash *flash = v4l2_flash->fled_cdev;
+ struct rt4505_priv *priv =
+ container_of(flash, struct rt4505_priv, flash);
+ u32 val = enable ? RT4505_EXT_FLASH_SET : 0;
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = regmap_update_bits(priv->regmap, RT4505_REG_ENABLE,
+ RT4505_ENABLE_MASK, val);
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static const struct v4l2_flash_ops v4l2_flash_ops = {
+ .external_strobe_set = rt4505_flash_external_strobe_set,
+};
+
+static void rt4505_init_v4l2_config(struct rt4505_priv *priv,
+ struct v4l2_flash_config *config)
+{
+ struct led_classdev_flash *flash = &priv->flash;
+ struct led_classdev *lcdev = &flash->led_cdev;
+ struct led_flash_setting *s;
+
+ strscpy(config->dev_name, lcdev->dev->kobj.name,
+ sizeof(config->dev_name));
+
+ s = &config->intensity;
+ s->min = RT4505_ITORCH_MINUA;
+ s->step = RT4505_ITORCH_STPUA;
+ s->max = s->val = s->min + (lcdev->max_brightness - 1) * s->step;
+
+ config->flash_faults = LED_FAULT_OVER_VOLTAGE |
+ LED_FAULT_SHORT_CIRCUIT |
+ LED_FAULT_LED_OVER_TEMPERATURE |
+ LED_FAULT_TIMEOUT;
+ config->has_external_strobe = 1;
+}
+#else
+static const struct v4l2_flash_ops v4l2_flash_ops;
+static void rt4505_init_v4l2_config(struct rt4505_priv *priv,
+ struct v4l2_flash_config *config)
+{
+}
+#endif
+
+static void rt4505_init_flash_properties(struct rt4505_priv *priv,
+ struct fwnode_handle *child)
+{
+ struct led_classdev_flash *flash = &priv->flash;
+ struct led_classdev *lcdev = &flash->led_cdev;
+ struct led_flash_setting *s;
+ u32 val;
+ int ret;
+
+ ret = fwnode_property_read_u32(child, "led-max-microamp", &val);
+ if (ret) {
+ dev_warn(priv->dev, "led-max-microamp DT property missing\n");
+ val = RT4505_ITORCH_MINUA;
+ } else
+ val = clamp_val(val, RT4505_ITORCH_MINUA, RT4505_ITORCH_MAXUA);
+
+ lcdev->max_brightness =
+ (val - RT4505_ITORCH_MINUA) / RT4505_ITORCH_STPUA + 1;
+ lcdev->brightness_set_blocking = rt4505_torch_brightness_set;
+ lcdev->brightness_get = rt4505_torch_brightness_get;
+ lcdev->flags |= LED_DEV_CAP_FLASH;
+
+ ret = fwnode_property_read_u32(child, "flash-max-microamp", &val);
+ if (ret) {
+ dev_warn(priv->dev, "flash-max-microamp DT property missing\n");
+ val = RT4505_IFLASH_MINUA;
+ } else
+ val = clamp_val(val, RT4505_IFLASH_MINUA, RT4505_IFLASH_MAXUA);
+
+ s = &flash->brightness;
+ s->min = RT4505_IFLASH_MINUA;
+ s->step = RT4505_IFLASH_STPUA;
+ s->max = s->val = val;
+
+ ret = fwnode_property_read_u32(child, "flash-max-timeout-us", &val);
+ if (ret) {
+ dev_warn(priv->dev,
+ "flash-max-timeout-us DT property missing\n");
+ val = RT4505_FLASHTO_MINUS;
+ } else
+ val = clamp_val(val, RT4505_FLASHTO_MINUS,
+ RT4505_FLASHTO_MAXUS);
+
+ s = &flash->timeout;
+ s->min = RT4505_FLASHTO_MINUS;
+ s->step = RT4505_FLASHTO_STPUS;
+ s->max = s->val = val;
+
+ flash->ops = &rt4505_flash_ops;
+}
+
+static int rt4505_probe(struct i2c_client *client)
+{
+ struct rt4505_priv *priv;
+ struct fwnode_handle *child;
+ struct led_init_data init_data = {};
+ struct v4l2_flash_config v4l2_config = {};
+ int ret;
+
+ priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = &client->dev;
+ mutex_init(&priv->lock);
+
+ priv->regmap = devm_regmap_init_i2c(client, &rt4505_regmap_config);
+ if (IS_ERR(priv->regmap)) {
+ dev_err(priv->dev, "Failed to allocate register map\n");
+ return PTR_ERR(priv->regmap);
+ }
+
+ ret = regmap_write(priv->regmap, RT4505_REG_RESET, RT4505_RESET_MASK);
+ if (ret) {
+ dev_err(priv->dev, "Failed to reset registers\n");
+ return ret;
+ }
+
+ child = fwnode_get_next_available_child_node(client->dev.fwnode, NULL);
+ if (!child) {
+ dev_err(priv->dev, "Failed to get child node\n");
+ return -EINVAL;
+ }
+ init_data.fwnode = child;
+
+ rt4505_init_flash_properties(priv, child);
+ ret = devm_led_classdev_flash_register_ext(priv->dev, &priv->flash,
+ &init_data);
+ if (ret) {
+ dev_err(priv->dev, "Failed to register flash\n");
+ return ret;
+ }
+
+ rt4505_init_v4l2_config(priv, &v4l2_config);
+ priv->v4l2_flash = v4l2_flash_init(priv->dev, init_data.fwnode,
+ &priv->flash, &v4l2_flash_ops,
+ &v4l2_config);
+ if (IS_ERR(priv->v4l2_flash)) {
+ dev_err(priv->dev, "Failed to register v4l2 flash\n");
+ return PTR_ERR(priv->v4l2_flash);
+ }
+
+ i2c_set_clientdata(client, priv);
+ return 0;
+}
+
+static void rt4505_remove(struct i2c_client *client)
+{
+ struct rt4505_priv *priv = i2c_get_clientdata(client);
+
+ v4l2_flash_release(priv->v4l2_flash);
+}
+
+static void rt4505_shutdown(struct i2c_client *client)
+{
+ struct rt4505_priv *priv = i2c_get_clientdata(client);
+
+ /* Reset registers to make sure all off before shutdown */
+ regmap_write(priv->regmap, RT4505_REG_RESET, RT4505_RESET_MASK);
+}
+
+static const struct of_device_id __maybe_unused rt4505_leds_match[] = {
+ { .compatible = "richtek,rt4505", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, rt4505_leds_match);
+
+static struct i2c_driver rt4505_driver = {
+ .driver = {
+ .name = "rt4505",
+ .of_match_table = of_match_ptr(rt4505_leds_match),
+ },
+ .probe_new = rt4505_probe,
+ .remove = rt4505_remove,
+ .shutdown = rt4505_shutdown,
+};
+module_i2c_driver(rt4505_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/flash/leds-rt8515.c b/drivers/leds/flash/leds-rt8515.c
new file mode 100644
index 000000000..44904fdee
--- /dev/null
+++ b/drivers/leds/flash/leds-rt8515.c
@@ -0,0 +1,399 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * LED driver for Richtek RT8515 flash/torch white LEDs
+ * found on some Samsung mobile phones.
+ *
+ * This is a 1.5A Boost dual channel driver produced around 2011.
+ *
+ * The component lacks a datasheet, but in the schematic picture
+ * from the LG P970 service manual you can see the connections
+ * from the RT8515 to the LED, with two resistors connected
+ * from the pins "RFS" and "RTS" to ground.
+ *
+ * On the LG P970:
+ * RFS (resistance flash setting?) is 20 kOhm
+ * RTS (resistance torch setting?) is 39 kOhm
+ *
+ * Some sleuthing finds us the RT9387A which we have a datasheet for:
+ * https://static5.arrow.com/pdfs/2014/7/27/8/21/12/794/rtt_/manual/94download_ds.jspprt9387a.jspprt9387a.pdf
+ * This apparently works the same way so in theory this driver
+ * should cover RT9387A as well. This has not been tested, please
+ * update the compatibles if you add RT9387A support.
+ *
+ * Linus Walleij <linus.walleij@linaro.org>
+ */
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/led-class-flash.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+
+#include <media/v4l2-flash-led-class.h>
+
+/* We can provide 15-700 mA out to the LED */
+#define RT8515_MIN_IOUT_MA 15
+#define RT8515_MAX_IOUT_MA 700
+/* The maximum intensity is 1-16 for flash and 1-100 for torch */
+#define RT8515_FLASH_MAX 16
+#define RT8515_TORCH_MAX 100
+
+#define RT8515_TIMEOUT_US 250000U
+#define RT8515_MAX_TIMEOUT_US 300000U
+
+struct rt8515 {
+ struct led_classdev_flash fled;
+ struct device *dev;
+ struct v4l2_flash *v4l2_flash;
+ struct mutex lock;
+ struct regulator *reg;
+ struct gpio_desc *enable_torch;
+ struct gpio_desc *enable_flash;
+ struct timer_list powerdown_timer;
+ u32 max_timeout; /* Flash max timeout */
+ int flash_max_intensity;
+ int torch_max_intensity;
+};
+
+static struct rt8515 *to_rt8515(struct led_classdev_flash *fled)
+{
+ return container_of(fled, struct rt8515, fled);
+}
+
+static void rt8515_gpio_led_off(struct rt8515 *rt)
+{
+ gpiod_set_value(rt->enable_flash, 0);
+ gpiod_set_value(rt->enable_torch, 0);
+}
+
+static void rt8515_gpio_brightness_commit(struct gpio_desc *gpiod,
+ int brightness)
+{
+ int i;
+
+ /*
+ * Toggling a GPIO line with a small delay increases the
+ * brightness one step at a time.
+ */
+ for (i = 0; i < brightness; i++) {
+ gpiod_set_value(gpiod, 0);
+ udelay(1);
+ gpiod_set_value(gpiod, 1);
+ udelay(1);
+ }
+}
+
+/* This is setting the torch light level */
+static int rt8515_led_brightness_set(struct led_classdev *led,
+ enum led_brightness brightness)
+{
+ struct led_classdev_flash *fled = lcdev_to_flcdev(led);
+ struct rt8515 *rt = to_rt8515(fled);
+
+ mutex_lock(&rt->lock);
+
+ if (brightness == LED_OFF) {
+ /* Off */
+ rt8515_gpio_led_off(rt);
+ } else if (brightness < RT8515_TORCH_MAX) {
+ /* Step it up to movie mode brightness using the flash pin */
+ rt8515_gpio_brightness_commit(rt->enable_torch, brightness);
+ } else {
+ /* Max torch brightness requested */
+ gpiod_set_value(rt->enable_torch, 1);
+ }
+
+ mutex_unlock(&rt->lock);
+
+ return 0;
+}
+
+static int rt8515_led_flash_strobe_set(struct led_classdev_flash *fled,
+ bool state)
+{
+ struct rt8515 *rt = to_rt8515(fled);
+ struct led_flash_setting *timeout = &fled->timeout;
+ int brightness = rt->flash_max_intensity;
+
+ mutex_lock(&rt->lock);
+
+ if (state) {
+ /* Enable LED flash mode and set brightness */
+ rt8515_gpio_brightness_commit(rt->enable_flash, brightness);
+ /* Set timeout */
+ mod_timer(&rt->powerdown_timer,
+ jiffies + usecs_to_jiffies(timeout->val));
+ } else {
+ del_timer_sync(&rt->powerdown_timer);
+ /* Turn the LED off */
+ rt8515_gpio_led_off(rt);
+ }
+
+ fled->led_cdev.brightness = LED_OFF;
+ /* After this the torch LED will be disabled */
+
+ mutex_unlock(&rt->lock);
+
+ return 0;
+}
+
+static int rt8515_led_flash_strobe_get(struct led_classdev_flash *fled,
+ bool *state)
+{
+ struct rt8515 *rt = to_rt8515(fled);
+
+ *state = timer_pending(&rt->powerdown_timer);
+
+ return 0;
+}
+
+static int rt8515_led_flash_timeout_set(struct led_classdev_flash *fled,
+ u32 timeout)
+{
+ /* The timeout is stored in the led-class-flash core */
+ return 0;
+}
+
+static const struct led_flash_ops rt8515_flash_ops = {
+ .strobe_set = rt8515_led_flash_strobe_set,
+ .strobe_get = rt8515_led_flash_strobe_get,
+ .timeout_set = rt8515_led_flash_timeout_set,
+};
+
+static void rt8515_powerdown_timer(struct timer_list *t)
+{
+ struct rt8515 *rt = from_timer(rt, t, powerdown_timer);
+
+ /* Turn the LED off */
+ rt8515_gpio_led_off(rt);
+}
+
+static void rt8515_init_flash_timeout(struct rt8515 *rt)
+{
+ struct led_classdev_flash *fled = &rt->fled;
+ struct led_flash_setting *s;
+
+ /* Init flash timeout setting */
+ s = &fled->timeout;
+ s->min = 1;
+ s->max = rt->max_timeout;
+ s->step = 1;
+ /*
+ * Set default timeout to RT8515_TIMEOUT_US except if
+ * max_timeout from DT is lower.
+ */
+ s->val = min(rt->max_timeout, RT8515_TIMEOUT_US);
+}
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+/* Configure the V2L2 flash subdevice */
+static void rt8515_init_v4l2_flash_config(struct rt8515 *rt,
+ struct v4l2_flash_config *v4l2_sd_cfg)
+{
+ struct led_classdev *led = &rt->fled.led_cdev;
+ struct led_flash_setting *s;
+
+ strscpy(v4l2_sd_cfg->dev_name, led->dev->kobj.name,
+ sizeof(v4l2_sd_cfg->dev_name));
+
+ /*
+ * Init flash intensity setting: this is a linear scale
+ * capped from the device tree max intensity setting
+ * 1..flash_max_intensity
+ */
+ s = &v4l2_sd_cfg->intensity;
+ s->min = 1;
+ s->max = rt->flash_max_intensity;
+ s->step = 1;
+ s->val = s->max;
+}
+
+static void rt8515_v4l2_flash_release(struct rt8515 *rt)
+{
+ v4l2_flash_release(rt->v4l2_flash);
+}
+
+#else
+static void rt8515_init_v4l2_flash_config(struct rt8515 *rt,
+ struct v4l2_flash_config *v4l2_sd_cfg)
+{
+}
+
+static void rt8515_v4l2_flash_release(struct rt8515 *rt)
+{
+}
+#endif
+
+static void rt8515_determine_max_intensity(struct rt8515 *rt,
+ struct fwnode_handle *led,
+ const char *resistance,
+ const char *max_ua_prop, int hw_max,
+ int *max_intensity_setting)
+{
+ u32 res = 0; /* Can't be 0 so 0 is undefined */
+ u32 ua;
+ u32 max_ma;
+ int max_intensity;
+ int ret;
+
+ fwnode_property_read_u32(rt->dev->fwnode, resistance, &res);
+ ret = fwnode_property_read_u32(led, max_ua_prop, &ua);
+
+ /* Missing info in DT, OK go with hardware maxima */
+ if (ret || res == 0) {
+ dev_err(rt->dev,
+ "either %s or %s missing from DT, using HW max\n",
+ resistance, max_ua_prop);
+ max_ma = RT8515_MAX_IOUT_MA;
+ max_intensity = hw_max;
+ goto out_assign_max;
+ }
+
+ /*
+ * Formula from the datasheet, this is the maximum current
+ * defined by the hardware.
+ */
+ max_ma = (5500 * 1000) / res;
+ /*
+ * Calculate max intensity (linear scaling)
+ * Formula is ((ua / 1000) / max_ma) * 100, then simplified
+ */
+ max_intensity = (ua / 10) / max_ma;
+
+ dev_info(rt->dev,
+ "current restricted from %u to %u mA, max intensity %d/100\n",
+ max_ma, (ua / 1000), max_intensity);
+
+out_assign_max:
+ dev_info(rt->dev, "max intensity %d/%d = %d mA\n",
+ max_intensity, hw_max, max_ma);
+ *max_intensity_setting = max_intensity;
+}
+
+static int rt8515_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct fwnode_handle *child;
+ struct rt8515 *rt;
+ struct led_classdev *led;
+ struct led_classdev_flash *fled;
+ struct led_init_data init_data = {};
+ struct v4l2_flash_config v4l2_sd_cfg = {};
+ int ret;
+
+ rt = devm_kzalloc(dev, sizeof(*rt), GFP_KERNEL);
+ if (!rt)
+ return -ENOMEM;
+
+ rt->dev = dev;
+ fled = &rt->fled;
+ led = &fled->led_cdev;
+
+ /* ENF - Enable Flash line */
+ rt->enable_flash = devm_gpiod_get(dev, "enf", GPIOD_OUT_LOW);
+ if (IS_ERR(rt->enable_flash))
+ return dev_err_probe(dev, PTR_ERR(rt->enable_flash),
+ "cannot get ENF (enable flash) GPIO\n");
+
+ /* ENT - Enable Torch line */
+ rt->enable_torch = devm_gpiod_get(dev, "ent", GPIOD_OUT_LOW);
+ if (IS_ERR(rt->enable_torch))
+ return dev_err_probe(dev, PTR_ERR(rt->enable_torch),
+ "cannot get ENT (enable torch) GPIO\n");
+
+ child = fwnode_get_next_available_child_node(dev->fwnode, NULL);
+ if (!child) {
+ dev_err(dev,
+ "No fwnode child node found for connected LED.\n");
+ return -EINVAL;
+ }
+ init_data.fwnode = child;
+
+ rt8515_determine_max_intensity(rt, child, "richtek,rfs-ohms",
+ "flash-max-microamp",
+ RT8515_FLASH_MAX,
+ &rt->flash_max_intensity);
+ rt8515_determine_max_intensity(rt, child, "richtek,rts-ohms",
+ "led-max-microamp",
+ RT8515_TORCH_MAX,
+ &rt->torch_max_intensity);
+
+ ret = fwnode_property_read_u32(child, "flash-max-timeout-us",
+ &rt->max_timeout);
+ if (ret) {
+ rt->max_timeout = RT8515_MAX_TIMEOUT_US;
+ dev_warn(dev,
+ "flash-max-timeout-us property missing\n");
+ }
+ timer_setup(&rt->powerdown_timer, rt8515_powerdown_timer, 0);
+ rt8515_init_flash_timeout(rt);
+
+ fled->ops = &rt8515_flash_ops;
+
+ led->max_brightness = rt->torch_max_intensity;
+ led->brightness_set_blocking = rt8515_led_brightness_set;
+ led->flags |= LED_CORE_SUSPENDRESUME | LED_DEV_CAP_FLASH;
+
+ mutex_init(&rt->lock);
+
+ platform_set_drvdata(pdev, rt);
+
+ ret = devm_led_classdev_flash_register_ext(dev, fled, &init_data);
+ if (ret) {
+ fwnode_handle_put(child);
+ mutex_destroy(&rt->lock);
+ dev_err(dev, "can't register LED %s\n", led->name);
+ return ret;
+ }
+
+ rt8515_init_v4l2_flash_config(rt, &v4l2_sd_cfg);
+
+ /* Create a V4L2 Flash device if V4L2 flash is enabled */
+ rt->v4l2_flash = v4l2_flash_init(dev, child, fled, NULL, &v4l2_sd_cfg);
+ if (IS_ERR(rt->v4l2_flash)) {
+ ret = PTR_ERR(rt->v4l2_flash);
+ dev_err(dev, "failed to register V4L2 flash device (%d)\n",
+ ret);
+ /*
+ * Continue without the V4L2 flash
+ * (we still have the classdev)
+ */
+ }
+
+ fwnode_handle_put(child);
+ return 0;
+}
+
+static int rt8515_remove(struct platform_device *pdev)
+{
+ struct rt8515 *rt = platform_get_drvdata(pdev);
+
+ rt8515_v4l2_flash_release(rt);
+ del_timer_sync(&rt->powerdown_timer);
+ mutex_destroy(&rt->lock);
+
+ return 0;
+}
+
+static const struct of_device_id rt8515_match[] = {
+ { .compatible = "richtek,rt8515", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, rt8515_match);
+
+static struct platform_driver rt8515_driver = {
+ .driver = {
+ .name = "rt8515",
+ .of_match_table = rt8515_match,
+ },
+ .probe = rt8515_probe,
+ .remove = rt8515_remove,
+};
+module_platform_driver(rt8515_driver);
+
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
+MODULE_DESCRIPTION("Richtek RT8515 LED driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/flash/leds-sgm3140.c b/drivers/leds/flash/leds-sgm3140.c
new file mode 100644
index 000000000..d3a30ad94
--- /dev/null
+++ b/drivers/leds/flash/leds-sgm3140.c
@@ -0,0 +1,312 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2020 Luca Weiss <luca@z3ntu.xyz>
+
+#include <linux/gpio/consumer.h>
+#include <linux/led-class-flash.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/platform_device.h>
+
+#include <media/v4l2-flash-led-class.h>
+
+#define FLASH_TIMEOUT_DEFAULT 250000U /* 250ms */
+#define FLASH_MAX_TIMEOUT_DEFAULT 300000U /* 300ms */
+
+struct sgm3140 {
+ struct led_classdev_flash fled_cdev;
+ struct v4l2_flash *v4l2_flash;
+
+ struct timer_list powerdown_timer;
+
+ struct gpio_desc *flash_gpio;
+ struct gpio_desc *enable_gpio;
+ struct regulator *vin_regulator;
+
+ bool enabled;
+
+ /* current timeout in us */
+ u32 timeout;
+ /* maximum timeout in us */
+ u32 max_timeout;
+};
+
+static struct sgm3140 *flcdev_to_sgm3140(struct led_classdev_flash *flcdev)
+{
+ return container_of(flcdev, struct sgm3140, fled_cdev);
+}
+
+static int sgm3140_strobe_set(struct led_classdev_flash *fled_cdev, bool state)
+{
+ struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
+ int ret;
+
+ if (priv->enabled == state)
+ return 0;
+
+ if (state) {
+ ret = regulator_enable(priv->vin_regulator);
+ if (ret) {
+ dev_err(fled_cdev->led_cdev.dev,
+ "failed to enable regulator: %d\n", ret);
+ return ret;
+ }
+ gpiod_set_value_cansleep(priv->flash_gpio, 1);
+ gpiod_set_value_cansleep(priv->enable_gpio, 1);
+ mod_timer(&priv->powerdown_timer,
+ jiffies + usecs_to_jiffies(priv->timeout));
+ } else {
+ del_timer_sync(&priv->powerdown_timer);
+ gpiod_set_value_cansleep(priv->enable_gpio, 0);
+ gpiod_set_value_cansleep(priv->flash_gpio, 0);
+ ret = regulator_disable(priv->vin_regulator);
+ if (ret) {
+ dev_err(fled_cdev->led_cdev.dev,
+ "failed to disable regulator: %d\n", ret);
+ return ret;
+ }
+ }
+
+ priv->enabled = state;
+
+ return 0;
+}
+
+static int sgm3140_strobe_get(struct led_classdev_flash *fled_cdev, bool *state)
+{
+ struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
+
+ *state = timer_pending(&priv->powerdown_timer);
+
+ return 0;
+}
+
+static int sgm3140_timeout_set(struct led_classdev_flash *fled_cdev,
+ u32 timeout)
+{
+ struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
+
+ priv->timeout = timeout;
+
+ return 0;
+}
+
+static const struct led_flash_ops sgm3140_flash_ops = {
+ .strobe_set = sgm3140_strobe_set,
+ .strobe_get = sgm3140_strobe_get,
+ .timeout_set = sgm3140_timeout_set,
+};
+
+static int sgm3140_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+ struct sgm3140 *priv = flcdev_to_sgm3140(fled_cdev);
+ bool enable = brightness == LED_ON;
+ int ret;
+
+ if (priv->enabled == enable)
+ return 0;
+
+ if (enable) {
+ ret = regulator_enable(priv->vin_regulator);
+ if (ret) {
+ dev_err(led_cdev->dev,
+ "failed to enable regulator: %d\n", ret);
+ return ret;
+ }
+ gpiod_set_value_cansleep(priv->enable_gpio, 1);
+ } else {
+ gpiod_set_value_cansleep(priv->enable_gpio, 0);
+ ret = regulator_disable(priv->vin_regulator);
+ if (ret) {
+ dev_err(led_cdev->dev,
+ "failed to disable regulator: %d\n", ret);
+ return ret;
+ }
+ }
+
+ priv->enabled = enable;
+
+ return 0;
+}
+
+static void sgm3140_powerdown_timer(struct timer_list *t)
+{
+ struct sgm3140 *priv = from_timer(priv, t, powerdown_timer);
+
+ gpiod_set_value(priv->enable_gpio, 0);
+ gpiod_set_value(priv->flash_gpio, 0);
+ regulator_disable(priv->vin_regulator);
+
+ priv->enabled = false;
+}
+
+static void sgm3140_init_flash_timeout(struct sgm3140 *priv)
+{
+ struct led_classdev_flash *fled_cdev = &priv->fled_cdev;
+ struct led_flash_setting *s;
+
+ /* Init flash timeout setting */
+ s = &fled_cdev->timeout;
+ s->min = 1;
+ s->max = priv->max_timeout;
+ s->step = 1;
+ s->val = FLASH_TIMEOUT_DEFAULT;
+}
+
+#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
+static void sgm3140_init_v4l2_flash_config(struct sgm3140 *priv,
+ struct v4l2_flash_config *v4l2_sd_cfg)
+{
+ struct led_classdev *led_cdev = &priv->fled_cdev.led_cdev;
+ struct led_flash_setting *s;
+
+ strscpy(v4l2_sd_cfg->dev_name, led_cdev->dev->kobj.name,
+ sizeof(v4l2_sd_cfg->dev_name));
+
+ /* Init flash intensity setting */
+ s = &v4l2_sd_cfg->intensity;
+ s->min = 0;
+ s->max = 1;
+ s->step = 1;
+ s->val = 1;
+}
+
+#else
+static void sgm3140_init_v4l2_flash_config(struct sgm3140 *priv,
+ struct v4l2_flash_config *v4l2_sd_cfg)
+{
+}
+#endif
+
+static int sgm3140_probe(struct platform_device *pdev)
+{
+ struct sgm3140 *priv;
+ struct led_classdev *led_cdev;
+ struct led_classdev_flash *fled_cdev;
+ struct led_init_data init_data = {};
+ struct fwnode_handle *child_node;
+ struct v4l2_flash_config v4l2_sd_cfg = {};
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->flash_gpio = devm_gpiod_get(&pdev->dev, "flash", GPIOD_OUT_LOW);
+ ret = PTR_ERR_OR_ZERO(priv->flash_gpio);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Failed to request flash gpio\n");
+
+ priv->enable_gpio = devm_gpiod_get(&pdev->dev, "enable", GPIOD_OUT_LOW);
+ ret = PTR_ERR_OR_ZERO(priv->enable_gpio);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Failed to request enable gpio\n");
+
+ priv->vin_regulator = devm_regulator_get(&pdev->dev, "vin");
+ ret = PTR_ERR_OR_ZERO(priv->vin_regulator);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Failed to request regulator\n");
+
+ child_node = fwnode_get_next_available_child_node(pdev->dev.fwnode,
+ NULL);
+ if (!child_node) {
+ dev_err(&pdev->dev,
+ "No fwnode child node found for connected LED.\n");
+ return -EINVAL;
+ }
+
+ ret = fwnode_property_read_u32(child_node, "flash-max-timeout-us",
+ &priv->max_timeout);
+ if (ret) {
+ priv->max_timeout = FLASH_MAX_TIMEOUT_DEFAULT;
+ dev_warn(&pdev->dev,
+ "flash-max-timeout-us property missing\n");
+ }
+
+ /*
+ * Set default timeout to FLASH_DEFAULT_TIMEOUT except if max_timeout
+ * from DT is lower.
+ */
+ priv->timeout = min(priv->max_timeout, FLASH_TIMEOUT_DEFAULT);
+
+ timer_setup(&priv->powerdown_timer, sgm3140_powerdown_timer, 0);
+
+ fled_cdev = &priv->fled_cdev;
+ led_cdev = &fled_cdev->led_cdev;
+
+ fled_cdev->ops = &sgm3140_flash_ops;
+
+ led_cdev->brightness_set_blocking = sgm3140_brightness_set;
+ led_cdev->max_brightness = LED_ON;
+ led_cdev->flags |= LED_DEV_CAP_FLASH;
+
+ sgm3140_init_flash_timeout(priv);
+
+ init_data.fwnode = child_node;
+
+ platform_set_drvdata(pdev, priv);
+
+ /* Register in the LED subsystem */
+ ret = devm_led_classdev_flash_register_ext(&pdev->dev,
+ fled_cdev, &init_data);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register flash device: %d\n",
+ ret);
+ goto err;
+ }
+
+ sgm3140_init_v4l2_flash_config(priv, &v4l2_sd_cfg);
+
+ /* Create V4L2 Flash subdev */
+ priv->v4l2_flash = v4l2_flash_init(&pdev->dev,
+ child_node,
+ fled_cdev, NULL,
+ &v4l2_sd_cfg);
+ if (IS_ERR(priv->v4l2_flash)) {
+ ret = PTR_ERR(priv->v4l2_flash);
+ goto err;
+ }
+
+ return ret;
+
+err:
+ fwnode_handle_put(child_node);
+ return ret;
+}
+
+static int sgm3140_remove(struct platform_device *pdev)
+{
+ struct sgm3140 *priv = platform_get_drvdata(pdev);
+
+ del_timer_sync(&priv->powerdown_timer);
+
+ v4l2_flash_release(priv->v4l2_flash);
+
+ return 0;
+}
+
+static const struct of_device_id sgm3140_dt_match[] = {
+ { .compatible = "ocs,ocp8110" },
+ { .compatible = "sgmicro,sgm3140" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sgm3140_dt_match);
+
+static struct platform_driver sgm3140_driver = {
+ .probe = sgm3140_probe,
+ .remove = sgm3140_remove,
+ .driver = {
+ .name = "sgm3140",
+ .of_match_table = sgm3140_dt_match,
+ },
+};
+
+module_platform_driver(sgm3140_driver);
+
+MODULE_AUTHOR("Luca Weiss <luca@z3ntu.xyz>");
+MODULE_DESCRIPTION("SG Micro SGM3140 charge pump LED driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/led-class-flash.c b/drivers/leds/led-class-flash.c
new file mode 100644
index 000000000..6fe9d700d
--- /dev/null
+++ b/drivers/leds/led-class-flash.c
@@ -0,0 +1,446 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Flash class interface
+ *
+ * Copyright (C) 2015 Samsung Electronics Co., Ltd.
+ * Author: Jacek Anaszewski <j.anaszewski@samsung.com>
+ */
+
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/led-class-flash.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include "leds.h"
+
+#define has_flash_op(fled_cdev, op) \
+ (fled_cdev && fled_cdev->ops->op)
+
+#define call_flash_op(fled_cdev, op, args...) \
+ ((has_flash_op(fled_cdev, op)) ? \
+ (fled_cdev->ops->op(fled_cdev, args)) : \
+ -EINVAL)
+
+static const char * const led_flash_fault_names[] = {
+ "led-over-voltage",
+ "flash-timeout-exceeded",
+ "controller-over-temperature",
+ "controller-short-circuit",
+ "led-power-supply-over-current",
+ "indicator-led-fault",
+ "led-under-voltage",
+ "controller-under-voltage",
+ "led-over-temperature",
+};
+
+static ssize_t flash_brightness_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+ unsigned long state;
+ ssize_t ret;
+
+ mutex_lock(&led_cdev->led_access);
+
+ if (led_sysfs_is_disabled(led_cdev)) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ ret = kstrtoul(buf, 10, &state);
+ if (ret)
+ goto unlock;
+
+ ret = led_set_flash_brightness(fled_cdev, state);
+ if (ret < 0)
+ goto unlock;
+
+ ret = size;
+unlock:
+ mutex_unlock(&led_cdev->led_access);
+ return ret;
+}
+
+static ssize_t flash_brightness_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+
+ /* no lock needed for this */
+ led_update_flash_brightness(fled_cdev);
+
+ return sprintf(buf, "%u\n", fled_cdev->brightness.val);
+}
+static DEVICE_ATTR_RW(flash_brightness);
+
+static ssize_t max_flash_brightness_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+
+ return sprintf(buf, "%u\n", fled_cdev->brightness.max);
+}
+static DEVICE_ATTR_RO(max_flash_brightness);
+
+static ssize_t flash_strobe_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+ unsigned long state;
+ ssize_t ret = -EBUSY;
+
+ mutex_lock(&led_cdev->led_access);
+
+ if (led_sysfs_is_disabled(led_cdev))
+ goto unlock;
+
+ ret = kstrtoul(buf, 10, &state);
+ if (ret)
+ goto unlock;
+
+ if (state > 1) {
+ ret = -EINVAL;
+ goto unlock;
+ }
+
+ ret = led_set_flash_strobe(fled_cdev, state);
+ if (ret < 0)
+ goto unlock;
+ ret = size;
+unlock:
+ mutex_unlock(&led_cdev->led_access);
+ return ret;
+}
+
+static ssize_t flash_strobe_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+ bool state;
+ int ret;
+
+ /* no lock needed for this */
+ ret = led_get_flash_strobe(fled_cdev, &state);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%u\n", state);
+}
+static DEVICE_ATTR_RW(flash_strobe);
+
+static ssize_t flash_timeout_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+ unsigned long flash_timeout;
+ ssize_t ret;
+
+ mutex_lock(&led_cdev->led_access);
+
+ if (led_sysfs_is_disabled(led_cdev)) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ ret = kstrtoul(buf, 10, &flash_timeout);
+ if (ret)
+ goto unlock;
+
+ ret = led_set_flash_timeout(fled_cdev, flash_timeout);
+ if (ret < 0)
+ goto unlock;
+
+ ret = size;
+unlock:
+ mutex_unlock(&led_cdev->led_access);
+ return ret;
+}
+
+static ssize_t flash_timeout_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+
+ return sprintf(buf, "%u\n", fled_cdev->timeout.val);
+}
+static DEVICE_ATTR_RW(flash_timeout);
+
+static ssize_t max_flash_timeout_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+
+ return sprintf(buf, "%u\n", fled_cdev->timeout.max);
+}
+static DEVICE_ATTR_RO(max_flash_timeout);
+
+static ssize_t flash_fault_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+ u32 fault, mask = 0x1;
+ char *pbuf = buf;
+ int i, ret, buf_len;
+
+ ret = led_get_flash_fault(fled_cdev, &fault);
+ if (ret < 0)
+ return -EINVAL;
+
+ *buf = '\0';
+
+ for (i = 0; i < LED_NUM_FLASH_FAULTS; ++i) {
+ if (fault & mask) {
+ buf_len = sprintf(pbuf, "%s ",
+ led_flash_fault_names[i]);
+ pbuf += buf_len;
+ }
+ mask <<= 1;
+ }
+
+ return strlen(strcat(buf, "\n"));
+}
+static DEVICE_ATTR_RO(flash_fault);
+
+static struct attribute *led_flash_strobe_attrs[] = {
+ &dev_attr_flash_strobe.attr,
+ NULL,
+};
+
+static struct attribute *led_flash_timeout_attrs[] = {
+ &dev_attr_flash_timeout.attr,
+ &dev_attr_max_flash_timeout.attr,
+ NULL,
+};
+
+static struct attribute *led_flash_brightness_attrs[] = {
+ &dev_attr_flash_brightness.attr,
+ &dev_attr_max_flash_brightness.attr,
+ NULL,
+};
+
+static struct attribute *led_flash_fault_attrs[] = {
+ &dev_attr_flash_fault.attr,
+ NULL,
+};
+
+static const struct attribute_group led_flash_strobe_group = {
+ .attrs = led_flash_strobe_attrs,
+};
+
+static const struct attribute_group led_flash_timeout_group = {
+ .attrs = led_flash_timeout_attrs,
+};
+
+static const struct attribute_group led_flash_brightness_group = {
+ .attrs = led_flash_brightness_attrs,
+};
+
+static const struct attribute_group led_flash_fault_group = {
+ .attrs = led_flash_fault_attrs,
+};
+
+static void led_flash_resume(struct led_classdev *led_cdev)
+{
+ struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
+
+ call_flash_op(fled_cdev, flash_brightness_set,
+ fled_cdev->brightness.val);
+ call_flash_op(fled_cdev, timeout_set, fled_cdev->timeout.val);
+}
+
+static void led_flash_init_sysfs_groups(struct led_classdev_flash *fled_cdev)
+{
+ struct led_classdev *led_cdev = &fled_cdev->led_cdev;
+ const struct led_flash_ops *ops = fled_cdev->ops;
+ const struct attribute_group **flash_groups = fled_cdev->sysfs_groups;
+
+ int num_sysfs_groups = 0;
+
+ flash_groups[num_sysfs_groups++] = &led_flash_strobe_group;
+
+ if (ops->flash_brightness_set)
+ flash_groups[num_sysfs_groups++] = &led_flash_brightness_group;
+
+ if (ops->timeout_set)
+ flash_groups[num_sysfs_groups++] = &led_flash_timeout_group;
+
+ if (ops->fault_get)
+ flash_groups[num_sysfs_groups++] = &led_flash_fault_group;
+
+ led_cdev->groups = flash_groups;
+}
+
+int led_classdev_flash_register_ext(struct device *parent,
+ struct led_classdev_flash *fled_cdev,
+ struct led_init_data *init_data)
+{
+ struct led_classdev *led_cdev;
+ const struct led_flash_ops *ops;
+ int ret;
+
+ if (!fled_cdev)
+ return -EINVAL;
+
+ led_cdev = &fled_cdev->led_cdev;
+
+ if (led_cdev->flags & LED_DEV_CAP_FLASH) {
+ if (!led_cdev->brightness_set_blocking)
+ return -EINVAL;
+
+ ops = fled_cdev->ops;
+ if (!ops || !ops->strobe_set)
+ return -EINVAL;
+
+ led_cdev->flash_resume = led_flash_resume;
+
+ /* Select the sysfs attributes to be created for the device */
+ led_flash_init_sysfs_groups(fled_cdev);
+ }
+
+ /* Register led class device */
+ ret = led_classdev_register_ext(parent, led_cdev, init_data);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(led_classdev_flash_register_ext);
+
+void led_classdev_flash_unregister(struct led_classdev_flash *fled_cdev)
+{
+ if (!fled_cdev)
+ return;
+
+ led_classdev_unregister(&fled_cdev->led_cdev);
+}
+EXPORT_SYMBOL_GPL(led_classdev_flash_unregister);
+
+static void devm_led_classdev_flash_release(struct device *dev, void *res)
+{
+ led_classdev_flash_unregister(*(struct led_classdev_flash **)res);
+}
+
+int devm_led_classdev_flash_register_ext(struct device *parent,
+ struct led_classdev_flash *fled_cdev,
+ struct led_init_data *init_data)
+{
+ struct led_classdev_flash **dr;
+ int ret;
+
+ dr = devres_alloc(devm_led_classdev_flash_release, sizeof(*dr),
+ GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ ret = led_classdev_flash_register_ext(parent, fled_cdev, init_data);
+ if (ret) {
+ devres_free(dr);
+ return ret;
+ }
+
+ *dr = fled_cdev;
+ devres_add(parent, dr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_led_classdev_flash_register_ext);
+
+static int devm_led_classdev_flash_match(struct device *dev,
+ void *res, void *data)
+{
+ struct led_classdev_flash **p = res;
+
+ if (WARN_ON(!p || !*p))
+ return 0;
+
+ return *p == data;
+}
+
+void devm_led_classdev_flash_unregister(struct device *dev,
+ struct led_classdev_flash *fled_cdev)
+{
+ WARN_ON(devres_release(dev,
+ devm_led_classdev_flash_release,
+ devm_led_classdev_flash_match, fled_cdev));
+}
+EXPORT_SYMBOL_GPL(devm_led_classdev_flash_unregister);
+
+static void led_clamp_align(struct led_flash_setting *s)
+{
+ u32 v, offset;
+
+ v = s->val + s->step / 2;
+ v = clamp(v, s->min, s->max);
+ offset = v - s->min;
+ offset = s->step * (offset / s->step);
+ s->val = s->min + offset;
+}
+
+int led_set_flash_timeout(struct led_classdev_flash *fled_cdev, u32 timeout)
+{
+ struct led_classdev *led_cdev = &fled_cdev->led_cdev;
+ struct led_flash_setting *s = &fled_cdev->timeout;
+
+ s->val = timeout;
+ led_clamp_align(s);
+
+ if (!(led_cdev->flags & LED_SUSPENDED))
+ return call_flash_op(fled_cdev, timeout_set, s->val);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(led_set_flash_timeout);
+
+int led_get_flash_fault(struct led_classdev_flash *fled_cdev, u32 *fault)
+{
+ return call_flash_op(fled_cdev, fault_get, fault);
+}
+EXPORT_SYMBOL_GPL(led_get_flash_fault);
+
+int led_set_flash_brightness(struct led_classdev_flash *fled_cdev,
+ u32 brightness)
+{
+ struct led_classdev *led_cdev = &fled_cdev->led_cdev;
+ struct led_flash_setting *s = &fled_cdev->brightness;
+
+ s->val = brightness;
+ led_clamp_align(s);
+
+ if (!(led_cdev->flags & LED_SUSPENDED))
+ return call_flash_op(fled_cdev, flash_brightness_set, s->val);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(led_set_flash_brightness);
+
+int led_update_flash_brightness(struct led_classdev_flash *fled_cdev)
+{
+ struct led_flash_setting *s = &fled_cdev->brightness;
+ u32 brightness;
+
+ if (has_flash_op(fled_cdev, flash_brightness_get)) {
+ int ret = call_flash_op(fled_cdev, flash_brightness_get,
+ &brightness);
+ if (ret < 0)
+ return ret;
+
+ s->val = brightness;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(led_update_flash_brightness);
+
+MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");
+MODULE_DESCRIPTION("LED Flash class interface");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/led-class-multicolor.c b/drivers/leds/led-class-multicolor.c
new file mode 100644
index 000000000..ec62a4811
--- /dev/null
+++ b/drivers/leds/led-class-multicolor.c
@@ -0,0 +1,205 @@
+// SPDX-License-Identifier: GPL-2.0
+// LED Multicolor class interface
+// Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
+// Author: Dan Murphy <dmurphy@ti.com>
+
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/math.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+
+#include "leds.h"
+
+int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev *led_cdev = &mcled_cdev->led_cdev;
+ int i;
+
+ for (i = 0; i < mcled_cdev->num_colors; i++)
+ mcled_cdev->subled_info[i].brightness =
+ DIV_ROUND_CLOSEST(brightness *
+ mcled_cdev->subled_info[i].intensity,
+ led_cdev->max_brightness);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(led_mc_calc_color_components);
+
+static ssize_t multi_intensity_store(struct device *dev,
+ struct device_attribute *intensity_attr,
+ const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
+ int nrchars, offset = 0;
+ int intensity_value[LED_COLOR_ID_MAX];
+ int i;
+ ssize_t ret;
+
+ mutex_lock(&led_cdev->led_access);
+
+ for (i = 0; i < mcled_cdev->num_colors; i++) {
+ ret = sscanf(buf + offset, "%i%n",
+ &intensity_value[i], &nrchars);
+ if (ret != 1) {
+ ret = -EINVAL;
+ goto err_out;
+ }
+ offset += nrchars;
+ }
+
+ offset++;
+ if (offset < size) {
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ for (i = 0; i < mcled_cdev->num_colors; i++)
+ mcled_cdev->subled_info[i].intensity = intensity_value[i];
+
+ led_set_brightness(led_cdev, led_cdev->brightness);
+ ret = size;
+err_out:
+ mutex_unlock(&led_cdev->led_access);
+ return ret;
+}
+
+static ssize_t multi_intensity_show(struct device *dev,
+ struct device_attribute *intensity_attr,
+ char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
+ int len = 0;
+ int i;
+
+ for (i = 0; i < mcled_cdev->num_colors; i++) {
+ len += sprintf(buf + len, "%d",
+ mcled_cdev->subled_info[i].intensity);
+ if (i < mcled_cdev->num_colors - 1)
+ len += sprintf(buf + len, " ");
+ }
+
+ buf[len++] = '\n';
+ return len;
+}
+static DEVICE_ATTR_RW(multi_intensity);
+
+static ssize_t multi_index_show(struct device *dev,
+ struct device_attribute *multi_index_attr,
+ char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
+ int len = 0;
+ int index;
+ int i;
+
+ for (i = 0; i < mcled_cdev->num_colors; i++) {
+ index = mcled_cdev->subled_info[i].color_index;
+ len += sprintf(buf + len, "%s", led_colors[index]);
+ if (i < mcled_cdev->num_colors - 1)
+ len += sprintf(buf + len, " ");
+ }
+
+ buf[len++] = '\n';
+ return len;
+}
+static DEVICE_ATTR_RO(multi_index);
+
+static struct attribute *led_multicolor_attrs[] = {
+ &dev_attr_multi_intensity.attr,
+ &dev_attr_multi_index.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(led_multicolor);
+
+int led_classdev_multicolor_register_ext(struct device *parent,
+ struct led_classdev_mc *mcled_cdev,
+ struct led_init_data *init_data)
+{
+ struct led_classdev *led_cdev;
+
+ if (!mcled_cdev)
+ return -EINVAL;
+
+ if (mcled_cdev->num_colors <= 0)
+ return -EINVAL;
+
+ if (mcled_cdev->num_colors > LED_COLOR_ID_MAX)
+ return -EINVAL;
+
+ led_cdev = &mcled_cdev->led_cdev;
+ mcled_cdev->led_cdev.groups = led_multicolor_groups;
+
+ return led_classdev_register_ext(parent, led_cdev, init_data);
+}
+EXPORT_SYMBOL_GPL(led_classdev_multicolor_register_ext);
+
+void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev)
+{
+ if (!mcled_cdev)
+ return;
+
+ led_classdev_unregister(&mcled_cdev->led_cdev);
+}
+EXPORT_SYMBOL_GPL(led_classdev_multicolor_unregister);
+
+static void devm_led_classdev_multicolor_release(struct device *dev, void *res)
+{
+ led_classdev_multicolor_unregister(*(struct led_classdev_mc **)res);
+}
+
+int devm_led_classdev_multicolor_register_ext(struct device *parent,
+ struct led_classdev_mc *mcled_cdev,
+ struct led_init_data *init_data)
+{
+ struct led_classdev_mc **dr;
+ int ret;
+
+ dr = devres_alloc(devm_led_classdev_multicolor_release,
+ sizeof(*dr), GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ ret = led_classdev_multicolor_register_ext(parent, mcled_cdev,
+ init_data);
+ if (ret) {
+ devres_free(dr);
+ return ret;
+ }
+
+ *dr = mcled_cdev;
+ devres_add(parent, dr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_led_classdev_multicolor_register_ext);
+
+static int devm_led_classdev_multicolor_match(struct device *dev,
+ void *res, void *data)
+{
+ struct led_classdev_mc **p = res;
+
+ if (WARN_ON(!p || !*p))
+ return 0;
+
+ return *p == data;
+}
+
+void devm_led_classdev_multicolor_unregister(struct device *dev,
+ struct led_classdev_mc *mcled_cdev)
+{
+ WARN_ON(devres_release(dev,
+ devm_led_classdev_multicolor_release,
+ devm_led_classdev_multicolor_match, mcled_cdev));
+}
+EXPORT_SYMBOL_GPL(devm_led_classdev_multicolor_unregister);
+
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_DESCRIPTION("Multicolor LED class interface");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
new file mode 100644
index 000000000..aa39b2a48
--- /dev/null
+++ b/drivers/leds/led-class.c
@@ -0,0 +1,552 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Class Core
+ *
+ * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
+ * Copyright (C) 2005-2007 Richard Purdie <rpurdie@openedhand.com>
+ */
+
+#include <linux/ctype.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <uapi/linux/uleds.h>
+#include <linux/of.h>
+#include "leds.h"
+
+static struct class *leds_class;
+
+static ssize_t brightness_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+
+ /* no lock needed for this */
+ led_update_brightness(led_cdev);
+
+ return sprintf(buf, "%u\n", led_cdev->brightness);
+}
+
+static ssize_t brightness_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ unsigned long state;
+ ssize_t ret;
+
+ mutex_lock(&led_cdev->led_access);
+
+ if (led_sysfs_is_disabled(led_cdev)) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ ret = kstrtoul(buf, 10, &state);
+ if (ret)
+ goto unlock;
+
+ if (state == LED_OFF)
+ led_trigger_remove(led_cdev);
+ led_set_brightness(led_cdev, state);
+ flush_work(&led_cdev->set_brightness_work);
+
+ ret = size;
+unlock:
+ mutex_unlock(&led_cdev->led_access);
+ return ret;
+}
+static DEVICE_ATTR_RW(brightness);
+
+static ssize_t max_brightness_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", led_cdev->max_brightness);
+}
+static DEVICE_ATTR_RO(max_brightness);
+
+#ifdef CONFIG_LEDS_TRIGGERS
+static BIN_ATTR(trigger, 0644, led_trigger_read, led_trigger_write, 0);
+static struct bin_attribute *led_trigger_bin_attrs[] = {
+ &bin_attr_trigger,
+ NULL,
+};
+static const struct attribute_group led_trigger_group = {
+ .bin_attrs = led_trigger_bin_attrs,
+};
+#endif
+
+static struct attribute *led_class_attrs[] = {
+ &dev_attr_brightness.attr,
+ &dev_attr_max_brightness.attr,
+ NULL,
+};
+
+static const struct attribute_group led_group = {
+ .attrs = led_class_attrs,
+};
+
+static const struct attribute_group *led_groups[] = {
+ &led_group,
+#ifdef CONFIG_LEDS_TRIGGERS
+ &led_trigger_group,
+#endif
+ NULL,
+};
+
+#ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED
+static ssize_t brightness_hw_changed_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+
+ if (led_cdev->brightness_hw_changed == -1)
+ return -ENODATA;
+
+ return sprintf(buf, "%u\n", led_cdev->brightness_hw_changed);
+}
+
+static DEVICE_ATTR_RO(brightness_hw_changed);
+
+static int led_add_brightness_hw_changed(struct led_classdev *led_cdev)
+{
+ struct device *dev = led_cdev->dev;
+ int ret;
+
+ ret = device_create_file(dev, &dev_attr_brightness_hw_changed);
+ if (ret) {
+ dev_err(dev, "Error creating brightness_hw_changed\n");
+ return ret;
+ }
+
+ led_cdev->brightness_hw_changed_kn =
+ sysfs_get_dirent(dev->kobj.sd, "brightness_hw_changed");
+ if (!led_cdev->brightness_hw_changed_kn) {
+ dev_err(dev, "Error getting brightness_hw_changed kn\n");
+ device_remove_file(dev, &dev_attr_brightness_hw_changed);
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+static void led_remove_brightness_hw_changed(struct led_classdev *led_cdev)
+{
+ sysfs_put(led_cdev->brightness_hw_changed_kn);
+ device_remove_file(led_cdev->dev, &dev_attr_brightness_hw_changed);
+}
+
+void led_classdev_notify_brightness_hw_changed(struct led_classdev *led_cdev, unsigned int brightness)
+{
+ if (WARN_ON(!led_cdev->brightness_hw_changed_kn))
+ return;
+
+ led_cdev->brightness_hw_changed = brightness;
+ sysfs_notify_dirent(led_cdev->brightness_hw_changed_kn);
+}
+EXPORT_SYMBOL_GPL(led_classdev_notify_brightness_hw_changed);
+#else
+static int led_add_brightness_hw_changed(struct led_classdev *led_cdev)
+{
+ return 0;
+}
+static void led_remove_brightness_hw_changed(struct led_classdev *led_cdev)
+{
+}
+#endif
+
+/**
+ * led_classdev_suspend - suspend an led_classdev.
+ * @led_cdev: the led_classdev to suspend.
+ */
+void led_classdev_suspend(struct led_classdev *led_cdev)
+{
+ led_cdev->flags |= LED_SUSPENDED;
+ led_set_brightness_nopm(led_cdev, 0);
+ flush_work(&led_cdev->set_brightness_work);
+}
+EXPORT_SYMBOL_GPL(led_classdev_suspend);
+
+/**
+ * led_classdev_resume - resume an led_classdev.
+ * @led_cdev: the led_classdev to resume.
+ */
+void led_classdev_resume(struct led_classdev *led_cdev)
+{
+ led_set_brightness_nopm(led_cdev, led_cdev->brightness);
+
+ if (led_cdev->flash_resume)
+ led_cdev->flash_resume(led_cdev);
+
+ led_cdev->flags &= ~LED_SUSPENDED;
+}
+EXPORT_SYMBOL_GPL(led_classdev_resume);
+
+#ifdef CONFIG_PM_SLEEP
+static int led_suspend(struct device *dev)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+
+ if (led_cdev->flags & LED_CORE_SUSPENDRESUME)
+ led_classdev_suspend(led_cdev);
+
+ return 0;
+}
+
+static int led_resume(struct device *dev)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+
+ if (led_cdev->flags & LED_CORE_SUSPENDRESUME)
+ led_classdev_resume(led_cdev);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(leds_class_dev_pm_ops, led_suspend, led_resume);
+
+/**
+ * of_led_get() - request a LED device via the LED framework
+ * @np: device node to get the LED device from
+ * @index: the index of the LED
+ *
+ * Returns the LED device parsed from the phandle specified in the "leds"
+ * property of a device tree node or a negative error-code on failure.
+ */
+struct led_classdev *of_led_get(struct device_node *np, int index)
+{
+ struct device *led_dev;
+ struct led_classdev *led_cdev;
+ struct device_node *led_node;
+
+ led_node = of_parse_phandle(np, "leds", index);
+ if (!led_node)
+ return ERR_PTR(-ENOENT);
+
+ led_dev = class_find_device_by_of_node(leds_class, led_node);
+ of_node_put(led_node);
+ put_device(led_dev);
+
+ if (!led_dev)
+ return ERR_PTR(-EPROBE_DEFER);
+
+ led_cdev = dev_get_drvdata(led_dev);
+
+ if (!try_module_get(led_cdev->dev->parent->driver->owner)) {
+ put_device(led_cdev->dev);
+ return ERR_PTR(-ENODEV);
+ }
+
+ return led_cdev;
+}
+EXPORT_SYMBOL_GPL(of_led_get);
+
+/**
+ * led_put() - release a LED device
+ * @led_cdev: LED device
+ */
+void led_put(struct led_classdev *led_cdev)
+{
+ module_put(led_cdev->dev->parent->driver->owner);
+ put_device(led_cdev->dev);
+}
+EXPORT_SYMBOL_GPL(led_put);
+
+static void devm_led_release(struct device *dev, void *res)
+{
+ struct led_classdev **p = res;
+
+ led_put(*p);
+}
+
+/**
+ * devm_of_led_get - Resource-managed request of a LED device
+ * @dev: LED consumer
+ * @index: index of the LED to obtain in the consumer
+ *
+ * The device node of the device is parse to find the request LED device.
+ * The LED device returned from this function is automatically released
+ * on driver detach.
+ *
+ * @return a pointer to a LED device or ERR_PTR(errno) on failure.
+ */
+struct led_classdev *__must_check devm_of_led_get(struct device *dev,
+ int index)
+{
+ struct led_classdev *led;
+ struct led_classdev **dr;
+
+ if (!dev)
+ return ERR_PTR(-EINVAL);
+
+ led = of_led_get(dev->of_node, index);
+ if (IS_ERR(led))
+ return led;
+
+ dr = devres_alloc(devm_led_release, sizeof(struct led_classdev *),
+ GFP_KERNEL);
+ if (!dr) {
+ led_put(led);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ *dr = led;
+ devres_add(dev, dr);
+
+ return led;
+}
+EXPORT_SYMBOL_GPL(devm_of_led_get);
+
+static int led_classdev_next_name(const char *init_name, char *name,
+ size_t len)
+{
+ unsigned int i = 0;
+ int ret = 0;
+ struct device *dev;
+
+ strlcpy(name, init_name, len);
+
+ while ((ret < len) &&
+ (dev = class_find_device_by_name(leds_class, name))) {
+ put_device(dev);
+ ret = snprintf(name, len, "%s_%u", init_name, ++i);
+ }
+
+ if (ret >= len)
+ return -ENOMEM;
+
+ return i;
+}
+
+/**
+ * led_classdev_register_ext - register a new object of led_classdev class
+ * with init data.
+ *
+ * @parent: parent of LED device
+ * @led_cdev: the led_classdev structure for this device.
+ * @init_data: LED class device initialization data
+ */
+int led_classdev_register_ext(struct device *parent,
+ struct led_classdev *led_cdev,
+ struct led_init_data *init_data)
+{
+ char composed_name[LED_MAX_NAME_SIZE];
+ char final_name[LED_MAX_NAME_SIZE];
+ const char *proposed_name = composed_name;
+ int ret;
+
+ if (init_data) {
+ if (init_data->devname_mandatory && !init_data->devicename) {
+ dev_err(parent, "Mandatory device name is missing");
+ return -EINVAL;
+ }
+ ret = led_compose_name(parent, init_data, composed_name);
+ if (ret < 0)
+ return ret;
+
+ if (init_data->fwnode) {
+ fwnode_property_read_string(init_data->fwnode,
+ "linux,default-trigger",
+ &led_cdev->default_trigger);
+
+ if (fwnode_property_present(init_data->fwnode,
+ "retain-state-shutdown"))
+ led_cdev->flags |= LED_RETAIN_AT_SHUTDOWN;
+ }
+ } else {
+ proposed_name = led_cdev->name;
+ }
+
+ ret = led_classdev_next_name(proposed_name, final_name, sizeof(final_name));
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&led_cdev->led_access);
+ mutex_lock(&led_cdev->led_access);
+ led_cdev->dev = device_create_with_groups(leds_class, parent, 0,
+ led_cdev, led_cdev->groups, "%s", final_name);
+ if (IS_ERR(led_cdev->dev)) {
+ mutex_unlock(&led_cdev->led_access);
+ return PTR_ERR(led_cdev->dev);
+ }
+ if (init_data && init_data->fwnode)
+ device_set_node(led_cdev->dev, init_data->fwnode);
+
+ if (ret)
+ dev_warn(parent, "Led %s renamed to %s due to name collision",
+ proposed_name, dev_name(led_cdev->dev));
+
+ if (led_cdev->flags & LED_BRIGHT_HW_CHANGED) {
+ ret = led_add_brightness_hw_changed(led_cdev);
+ if (ret) {
+ device_unregister(led_cdev->dev);
+ led_cdev->dev = NULL;
+ mutex_unlock(&led_cdev->led_access);
+ return ret;
+ }
+ }
+
+ led_cdev->work_flags = 0;
+#ifdef CONFIG_LEDS_TRIGGERS
+ init_rwsem(&led_cdev->trigger_lock);
+#endif
+#ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED
+ led_cdev->brightness_hw_changed = -1;
+#endif
+ /* add to the list of leds */
+ down_write(&leds_list_lock);
+ list_add_tail(&led_cdev->node, &leds_list);
+ up_write(&leds_list_lock);
+
+ if (!led_cdev->max_brightness)
+ led_cdev->max_brightness = LED_FULL;
+
+ led_update_brightness(led_cdev);
+
+ led_init_core(led_cdev);
+
+#ifdef CONFIG_LEDS_TRIGGERS
+ led_trigger_set_default(led_cdev);
+#endif
+
+ mutex_unlock(&led_cdev->led_access);
+
+ dev_dbg(parent, "Registered led device: %s\n",
+ led_cdev->name);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(led_classdev_register_ext);
+
+/**
+ * led_classdev_unregister - unregisters a object of led_properties class.
+ * @led_cdev: the led device to unregister
+ *
+ * Unregisters a previously registered via led_classdev_register object.
+ */
+void led_classdev_unregister(struct led_classdev *led_cdev)
+{
+ if (IS_ERR_OR_NULL(led_cdev->dev))
+ return;
+
+#ifdef CONFIG_LEDS_TRIGGERS
+ down_write(&led_cdev->trigger_lock);
+ if (led_cdev->trigger)
+ led_trigger_set(led_cdev, NULL);
+ up_write(&led_cdev->trigger_lock);
+#endif
+
+ led_cdev->flags |= LED_UNREGISTERING;
+
+ /* Stop blinking */
+ led_stop_software_blink(led_cdev);
+
+ if (!(led_cdev->flags & LED_RETAIN_AT_SHUTDOWN))
+ led_set_brightness(led_cdev, LED_OFF);
+
+ flush_work(&led_cdev->set_brightness_work);
+
+ if (led_cdev->flags & LED_BRIGHT_HW_CHANGED)
+ led_remove_brightness_hw_changed(led_cdev);
+
+ device_unregister(led_cdev->dev);
+
+ down_write(&leds_list_lock);
+ list_del(&led_cdev->node);
+ up_write(&leds_list_lock);
+
+ mutex_destroy(&led_cdev->led_access);
+}
+EXPORT_SYMBOL_GPL(led_classdev_unregister);
+
+static void devm_led_classdev_release(struct device *dev, void *res)
+{
+ led_classdev_unregister(*(struct led_classdev **)res);
+}
+
+/**
+ * devm_led_classdev_register_ext - resource managed led_classdev_register_ext()
+ *
+ * @parent: parent of LED device
+ * @led_cdev: the led_classdev structure for this device.
+ * @init_data: LED class device initialization data
+ */
+int devm_led_classdev_register_ext(struct device *parent,
+ struct led_classdev *led_cdev,
+ struct led_init_data *init_data)
+{
+ struct led_classdev **dr;
+ int rc;
+
+ dr = devres_alloc(devm_led_classdev_release, sizeof(*dr), GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ rc = led_classdev_register_ext(parent, led_cdev, init_data);
+ if (rc) {
+ devres_free(dr);
+ return rc;
+ }
+
+ *dr = led_cdev;
+ devres_add(parent, dr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_led_classdev_register_ext);
+
+static int devm_led_classdev_match(struct device *dev, void *res, void *data)
+{
+ struct led_classdev **p = res;
+
+ if (WARN_ON(!p || !*p))
+ return 0;
+
+ return *p == data;
+}
+
+/**
+ * devm_led_classdev_unregister() - resource managed led_classdev_unregister()
+ * @dev: The device to unregister.
+ * @led_cdev: the led_classdev structure for this device.
+ */
+void devm_led_classdev_unregister(struct device *dev,
+ struct led_classdev *led_cdev)
+{
+ WARN_ON(devres_release(dev,
+ devm_led_classdev_release,
+ devm_led_classdev_match, led_cdev));
+}
+EXPORT_SYMBOL_GPL(devm_led_classdev_unregister);
+
+static int __init leds_init(void)
+{
+ leds_class = class_create(THIS_MODULE, "leds");
+ if (IS_ERR(leds_class))
+ return PTR_ERR(leds_class);
+ leds_class->pm = &leds_class_dev_pm_ops;
+ leds_class->dev_groups = led_groups;
+ return 0;
+}
+
+static void __exit leds_exit(void)
+{
+ class_destroy(leds_class);
+}
+
+subsys_initcall(leds_init);
+module_exit(leds_exit);
+
+MODULE_AUTHOR("John Lenz, Richard Purdie");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("LED Class Interface");
diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c
new file mode 100644
index 000000000..d94d60b52
--- /dev/null
+++ b/drivers/leds/led-core.c
@@ -0,0 +1,490 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Class Core
+ *
+ * Copyright 2005-2006 Openedhand Ltd.
+ *
+ * Author: Richard Purdie <rpurdie@openedhand.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/property.h>
+#include <linux/rwsem.h>
+#include <linux/slab.h>
+#include <uapi/linux/uleds.h>
+#include "leds.h"
+
+DECLARE_RWSEM(leds_list_lock);
+EXPORT_SYMBOL_GPL(leds_list_lock);
+
+LIST_HEAD(leds_list);
+EXPORT_SYMBOL_GPL(leds_list);
+
+const char * const led_colors[LED_COLOR_ID_MAX] = {
+ [LED_COLOR_ID_WHITE] = "white",
+ [LED_COLOR_ID_RED] = "red",
+ [LED_COLOR_ID_GREEN] = "green",
+ [LED_COLOR_ID_BLUE] = "blue",
+ [LED_COLOR_ID_AMBER] = "amber",
+ [LED_COLOR_ID_VIOLET] = "violet",
+ [LED_COLOR_ID_YELLOW] = "yellow",
+ [LED_COLOR_ID_IR] = "ir",
+ [LED_COLOR_ID_MULTI] = "multicolor",
+ [LED_COLOR_ID_RGB] = "rgb",
+};
+EXPORT_SYMBOL_GPL(led_colors);
+
+static int __led_set_brightness(struct led_classdev *led_cdev, unsigned int value)
+{
+ if (!led_cdev->brightness_set)
+ return -ENOTSUPP;
+
+ led_cdev->brightness_set(led_cdev, value);
+
+ return 0;
+}
+
+static int __led_set_brightness_blocking(struct led_classdev *led_cdev, unsigned int value)
+{
+ if (!led_cdev->brightness_set_blocking)
+ return -ENOTSUPP;
+
+ return led_cdev->brightness_set_blocking(led_cdev, value);
+}
+
+static void led_timer_function(struct timer_list *t)
+{
+ struct led_classdev *led_cdev = from_timer(led_cdev, t, blink_timer);
+ unsigned long brightness;
+ unsigned long delay;
+
+ if (!led_cdev->blink_delay_on || !led_cdev->blink_delay_off) {
+ led_set_brightness_nosleep(led_cdev, LED_OFF);
+ clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
+ return;
+ }
+
+ if (test_and_clear_bit(LED_BLINK_ONESHOT_STOP,
+ &led_cdev->work_flags)) {
+ clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
+ return;
+ }
+
+ brightness = led_get_brightness(led_cdev);
+ if (!brightness) {
+ /* Time to switch the LED on. */
+ if (test_and_clear_bit(LED_BLINK_BRIGHTNESS_CHANGE,
+ &led_cdev->work_flags))
+ brightness = led_cdev->new_blink_brightness;
+ else
+ brightness = led_cdev->blink_brightness;
+ delay = led_cdev->blink_delay_on;
+ } else {
+ /* Store the current brightness value to be able
+ * to restore it when the delay_off period is over.
+ */
+ led_cdev->blink_brightness = brightness;
+ brightness = LED_OFF;
+ delay = led_cdev->blink_delay_off;
+ }
+
+ led_set_brightness_nosleep(led_cdev, brightness);
+
+ /* Return in next iteration if led is in one-shot mode and we are in
+ * the final blink state so that the led is toggled each delay_on +
+ * delay_off milliseconds in worst case.
+ */
+ if (test_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags)) {
+ if (test_bit(LED_BLINK_INVERT, &led_cdev->work_flags)) {
+ if (brightness)
+ set_bit(LED_BLINK_ONESHOT_STOP,
+ &led_cdev->work_flags);
+ } else {
+ if (!brightness)
+ set_bit(LED_BLINK_ONESHOT_STOP,
+ &led_cdev->work_flags);
+ }
+ }
+
+ mod_timer(&led_cdev->blink_timer, jiffies + msecs_to_jiffies(delay));
+}
+
+static void set_brightness_delayed(struct work_struct *ws)
+{
+ struct led_classdev *led_cdev =
+ container_of(ws, struct led_classdev, set_brightness_work);
+ int ret = 0;
+
+ if (test_and_clear_bit(LED_BLINK_DISABLE, &led_cdev->work_flags)) {
+ led_cdev->delayed_set_value = LED_OFF;
+ led_stop_software_blink(led_cdev);
+ }
+
+ ret = __led_set_brightness(led_cdev, led_cdev->delayed_set_value);
+ if (ret == -ENOTSUPP)
+ ret = __led_set_brightness_blocking(led_cdev,
+ led_cdev->delayed_set_value);
+ if (ret < 0 &&
+ /* LED HW might have been unplugged, therefore don't warn */
+ !(ret == -ENODEV && (led_cdev->flags & LED_UNREGISTERING) &&
+ (led_cdev->flags & LED_HW_PLUGGABLE)))
+ dev_err(led_cdev->dev,
+ "Setting an LED's brightness failed (%d)\n", ret);
+}
+
+static void led_set_software_blink(struct led_classdev *led_cdev,
+ unsigned long delay_on,
+ unsigned long delay_off)
+{
+ int current_brightness;
+
+ current_brightness = led_get_brightness(led_cdev);
+ if (current_brightness)
+ led_cdev->blink_brightness = current_brightness;
+ if (!led_cdev->blink_brightness)
+ led_cdev->blink_brightness = led_cdev->max_brightness;
+
+ led_cdev->blink_delay_on = delay_on;
+ led_cdev->blink_delay_off = delay_off;
+
+ /* never on - just set to off */
+ if (!delay_on) {
+ led_set_brightness_nosleep(led_cdev, LED_OFF);
+ return;
+ }
+
+ /* never off - just set to brightness */
+ if (!delay_off) {
+ led_set_brightness_nosleep(led_cdev,
+ led_cdev->blink_brightness);
+ return;
+ }
+
+ set_bit(LED_BLINK_SW, &led_cdev->work_flags);
+ mod_timer(&led_cdev->blink_timer, jiffies + 1);
+}
+
+
+static void led_blink_setup(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ if (!test_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags) &&
+ led_cdev->blink_set &&
+ !led_cdev->blink_set(led_cdev, delay_on, delay_off))
+ return;
+
+ /* blink with 1 Hz as default if nothing specified */
+ if (!*delay_on && !*delay_off)
+ *delay_on = *delay_off = 500;
+
+ led_set_software_blink(led_cdev, *delay_on, *delay_off);
+}
+
+void led_init_core(struct led_classdev *led_cdev)
+{
+ INIT_WORK(&led_cdev->set_brightness_work, set_brightness_delayed);
+
+ timer_setup(&led_cdev->blink_timer, led_timer_function, 0);
+}
+EXPORT_SYMBOL_GPL(led_init_core);
+
+void led_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ del_timer_sync(&led_cdev->blink_timer);
+
+ clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
+ clear_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags);
+ clear_bit(LED_BLINK_ONESHOT_STOP, &led_cdev->work_flags);
+
+ led_blink_setup(led_cdev, delay_on, delay_off);
+}
+EXPORT_SYMBOL_GPL(led_blink_set);
+
+void led_blink_set_oneshot(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off,
+ int invert)
+{
+ if (test_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags) &&
+ timer_pending(&led_cdev->blink_timer))
+ return;
+
+ set_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags);
+ clear_bit(LED_BLINK_ONESHOT_STOP, &led_cdev->work_flags);
+
+ if (invert)
+ set_bit(LED_BLINK_INVERT, &led_cdev->work_flags);
+ else
+ clear_bit(LED_BLINK_INVERT, &led_cdev->work_flags);
+
+ led_blink_setup(led_cdev, delay_on, delay_off);
+}
+EXPORT_SYMBOL_GPL(led_blink_set_oneshot);
+
+void led_stop_software_blink(struct led_classdev *led_cdev)
+{
+ del_timer_sync(&led_cdev->blink_timer);
+ led_cdev->blink_delay_on = 0;
+ led_cdev->blink_delay_off = 0;
+ clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
+}
+EXPORT_SYMBOL_GPL(led_stop_software_blink);
+
+void led_set_brightness(struct led_classdev *led_cdev, unsigned int brightness)
+{
+ /*
+ * If software blink is active, delay brightness setting
+ * until the next timer tick.
+ */
+ if (test_bit(LED_BLINK_SW, &led_cdev->work_flags)) {
+ /*
+ * If we need to disable soft blinking delegate this to the
+ * work queue task to avoid problems in case we are called
+ * from hard irq context.
+ */
+ if (!brightness) {
+ set_bit(LED_BLINK_DISABLE, &led_cdev->work_flags);
+ schedule_work(&led_cdev->set_brightness_work);
+ } else {
+ set_bit(LED_BLINK_BRIGHTNESS_CHANGE,
+ &led_cdev->work_flags);
+ led_cdev->new_blink_brightness = brightness;
+ }
+ return;
+ }
+
+ led_set_brightness_nosleep(led_cdev, brightness);
+}
+EXPORT_SYMBOL_GPL(led_set_brightness);
+
+void led_set_brightness_nopm(struct led_classdev *led_cdev, unsigned int value)
+{
+ /* Use brightness_set op if available, it is guaranteed not to sleep */
+ if (!__led_set_brightness(led_cdev, value))
+ return;
+
+ /* If brightness setting can sleep, delegate it to a work queue task */
+ led_cdev->delayed_set_value = value;
+ schedule_work(&led_cdev->set_brightness_work);
+}
+EXPORT_SYMBOL_GPL(led_set_brightness_nopm);
+
+void led_set_brightness_nosleep(struct led_classdev *led_cdev, unsigned int value)
+{
+ led_cdev->brightness = min(value, led_cdev->max_brightness);
+
+ if (led_cdev->flags & LED_SUSPENDED)
+ return;
+
+ led_set_brightness_nopm(led_cdev, led_cdev->brightness);
+}
+EXPORT_SYMBOL_GPL(led_set_brightness_nosleep);
+
+int led_set_brightness_sync(struct led_classdev *led_cdev, unsigned int value)
+{
+ if (led_cdev->blink_delay_on || led_cdev->blink_delay_off)
+ return -EBUSY;
+
+ led_cdev->brightness = min(value, led_cdev->max_brightness);
+
+ if (led_cdev->flags & LED_SUSPENDED)
+ return 0;
+
+ return __led_set_brightness_blocking(led_cdev, led_cdev->brightness);
+}
+EXPORT_SYMBOL_GPL(led_set_brightness_sync);
+
+int led_update_brightness(struct led_classdev *led_cdev)
+{
+ int ret = 0;
+
+ if (led_cdev->brightness_get) {
+ ret = led_cdev->brightness_get(led_cdev);
+ if (ret >= 0) {
+ led_cdev->brightness = ret;
+ return 0;
+ }
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(led_update_brightness);
+
+u32 *led_get_default_pattern(struct led_classdev *led_cdev, unsigned int *size)
+{
+ struct fwnode_handle *fwnode = led_cdev->dev->fwnode;
+ u32 *pattern;
+ int count;
+
+ count = fwnode_property_count_u32(fwnode, "led-pattern");
+ if (count < 0)
+ return NULL;
+
+ pattern = kcalloc(count, sizeof(*pattern), GFP_KERNEL);
+ if (!pattern)
+ return NULL;
+
+ if (fwnode_property_read_u32_array(fwnode, "led-pattern", pattern, count)) {
+ kfree(pattern);
+ return NULL;
+ }
+
+ *size = count;
+
+ return pattern;
+}
+EXPORT_SYMBOL_GPL(led_get_default_pattern);
+
+/* Caller must ensure led_cdev->led_access held */
+void led_sysfs_disable(struct led_classdev *led_cdev)
+{
+ lockdep_assert_held(&led_cdev->led_access);
+
+ led_cdev->flags |= LED_SYSFS_DISABLE;
+}
+EXPORT_SYMBOL_GPL(led_sysfs_disable);
+
+/* Caller must ensure led_cdev->led_access held */
+void led_sysfs_enable(struct led_classdev *led_cdev)
+{
+ lockdep_assert_held(&led_cdev->led_access);
+
+ led_cdev->flags &= ~LED_SYSFS_DISABLE;
+}
+EXPORT_SYMBOL_GPL(led_sysfs_enable);
+
+static void led_parse_fwnode_props(struct device *dev,
+ struct fwnode_handle *fwnode,
+ struct led_properties *props)
+{
+ int ret;
+
+ if (!fwnode)
+ return;
+
+ if (fwnode_property_present(fwnode, "label")) {
+ ret = fwnode_property_read_string(fwnode, "label", &props->label);
+ if (ret)
+ dev_err(dev, "Error parsing 'label' property (%d)\n", ret);
+ return;
+ }
+
+ if (fwnode_property_present(fwnode, "color")) {
+ ret = fwnode_property_read_u32(fwnode, "color", &props->color);
+ if (ret)
+ dev_err(dev, "Error parsing 'color' property (%d)\n", ret);
+ else if (props->color >= LED_COLOR_ID_MAX)
+ dev_err(dev, "LED color identifier out of range\n");
+ else
+ props->color_present = true;
+ }
+
+
+ if (!fwnode_property_present(fwnode, "function"))
+ return;
+
+ ret = fwnode_property_read_string(fwnode, "function", &props->function);
+ if (ret) {
+ dev_err(dev,
+ "Error parsing 'function' property (%d)\n",
+ ret);
+ }
+
+ if (!fwnode_property_present(fwnode, "function-enumerator"))
+ return;
+
+ ret = fwnode_property_read_u32(fwnode, "function-enumerator",
+ &props->func_enum);
+ if (ret) {
+ dev_err(dev,
+ "Error parsing 'function-enumerator' property (%d)\n",
+ ret);
+ } else {
+ props->func_enum_present = true;
+ }
+}
+
+int led_compose_name(struct device *dev, struct led_init_data *init_data,
+ char *led_classdev_name)
+{
+ struct led_properties props = {};
+ struct fwnode_handle *fwnode = init_data->fwnode;
+ const char *devicename = init_data->devicename;
+
+ if (!led_classdev_name)
+ return -EINVAL;
+
+ led_parse_fwnode_props(dev, fwnode, &props);
+
+ if (props.label) {
+ /*
+ * If init_data.devicename is NULL, then it indicates that
+ * DT label should be used as-is for LED class device name.
+ * Otherwise the label is prepended with devicename to compose
+ * the final LED class device name.
+ */
+ if (!devicename) {
+ strscpy(led_classdev_name, props.label,
+ LED_MAX_NAME_SIZE);
+ } else {
+ snprintf(led_classdev_name, LED_MAX_NAME_SIZE, "%s:%s",
+ devicename, props.label);
+ }
+ } else if (props.function || props.color_present) {
+ char tmp_buf[LED_MAX_NAME_SIZE];
+
+ if (props.func_enum_present) {
+ snprintf(tmp_buf, LED_MAX_NAME_SIZE, "%s:%s-%d",
+ props.color_present ? led_colors[props.color] : "",
+ props.function ?: "", props.func_enum);
+ } else {
+ snprintf(tmp_buf, LED_MAX_NAME_SIZE, "%s:%s",
+ props.color_present ? led_colors[props.color] : "",
+ props.function ?: "");
+ }
+ if (init_data->devname_mandatory) {
+ snprintf(led_classdev_name, LED_MAX_NAME_SIZE, "%s:%s",
+ devicename, tmp_buf);
+ } else {
+ strscpy(led_classdev_name, tmp_buf, LED_MAX_NAME_SIZE);
+
+ }
+ } else if (init_data->default_label) {
+ if (!devicename) {
+ dev_err(dev, "Legacy LED naming requires devicename segment");
+ return -EINVAL;
+ }
+ snprintf(led_classdev_name, LED_MAX_NAME_SIZE, "%s:%s",
+ devicename, init_data->default_label);
+ } else if (is_of_node(fwnode)) {
+ strscpy(led_classdev_name, to_of_node(fwnode)->name,
+ LED_MAX_NAME_SIZE);
+ } else
+ return -EINVAL;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(led_compose_name);
+
+enum led_default_state led_init_default_state_get(struct fwnode_handle *fwnode)
+{
+ const char *state = NULL;
+
+ if (!fwnode_property_read_string(fwnode, "default-state", &state)) {
+ if (!strcmp(state, "keep"))
+ return LEDS_DEFSTATE_KEEP;
+ if (!strcmp(state, "on"))
+ return LEDS_DEFSTATE_ON;
+ }
+
+ return LEDS_DEFSTATE_OFF;
+}
+EXPORT_SYMBOL_GPL(led_init_default_state_get);
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
new file mode 100644
index 000000000..072491d3e
--- /dev/null
+++ b/drivers/leds/led-triggers.c
@@ -0,0 +1,464 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Triggers Core
+ *
+ * Copyright 2005-2007 Openedhand Ltd.
+ *
+ * Author: Richard Purdie <rpurdie@openedhand.com>
+ */
+
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/device.h>
+#include <linux/timer.h>
+#include <linux/rwsem.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include "leds.h"
+
+/*
+ * Nests outside led_cdev->trigger_lock
+ */
+static DECLARE_RWSEM(triggers_list_lock);
+LIST_HEAD(trigger_list);
+
+ /* Used by LED Class */
+
+static inline bool
+trigger_relevant(struct led_classdev *led_cdev, struct led_trigger *trig)
+{
+ return !trig->trigger_type || trig->trigger_type == led_cdev->trigger_type;
+}
+
+ssize_t led_trigger_write(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf,
+ loff_t pos, size_t count)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_trigger *trig;
+ int ret = count;
+
+ mutex_lock(&led_cdev->led_access);
+
+ if (led_sysfs_is_disabled(led_cdev)) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ if (sysfs_streq(buf, "none")) {
+ led_trigger_remove(led_cdev);
+ goto unlock;
+ }
+
+ down_read(&triggers_list_lock);
+ list_for_each_entry(trig, &trigger_list, next_trig) {
+ if (sysfs_streq(buf, trig->name) && trigger_relevant(led_cdev, trig)) {
+ down_write(&led_cdev->trigger_lock);
+ led_trigger_set(led_cdev, trig);
+ up_write(&led_cdev->trigger_lock);
+
+ up_read(&triggers_list_lock);
+ goto unlock;
+ }
+ }
+ /* we come here only if buf matches no trigger */
+ ret = -EINVAL;
+ up_read(&triggers_list_lock);
+
+unlock:
+ mutex_unlock(&led_cdev->led_access);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(led_trigger_write);
+
+__printf(3, 4)
+static int led_trigger_snprintf(char *buf, ssize_t size, const char *fmt, ...)
+{
+ va_list args;
+ int i;
+
+ va_start(args, fmt);
+ if (size <= 0)
+ i = vsnprintf(NULL, 0, fmt, args);
+ else
+ i = vscnprintf(buf, size, fmt, args);
+ va_end(args);
+
+ return i;
+}
+
+static int led_trigger_format(char *buf, size_t size,
+ struct led_classdev *led_cdev)
+{
+ struct led_trigger *trig;
+ int len = led_trigger_snprintf(buf, size, "%s",
+ led_cdev->trigger ? "none" : "[none]");
+
+ list_for_each_entry(trig, &trigger_list, next_trig) {
+ bool hit;
+
+ if (!trigger_relevant(led_cdev, trig))
+ continue;
+
+ hit = led_cdev->trigger && !strcmp(led_cdev->trigger->name, trig->name);
+
+ len += led_trigger_snprintf(buf + len, size - len,
+ " %s%s%s", hit ? "[" : "",
+ trig->name, hit ? "]" : "");
+ }
+
+ len += led_trigger_snprintf(buf + len, size - len, "\n");
+
+ return len;
+}
+
+/*
+ * It was stupid to create 10000 cpu triggers, but we are stuck with it now.
+ * Don't make that mistake again. We work around it here by creating binary
+ * attribute, which is not limited by length. This is _not_ good design, do not
+ * copy it.
+ */
+ssize_t led_trigger_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t pos, size_t count)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ void *data;
+ int len;
+
+ down_read(&triggers_list_lock);
+ down_read(&led_cdev->trigger_lock);
+
+ len = led_trigger_format(NULL, 0, led_cdev);
+ data = kvmalloc(len + 1, GFP_KERNEL);
+ if (!data) {
+ up_read(&led_cdev->trigger_lock);
+ up_read(&triggers_list_lock);
+ return -ENOMEM;
+ }
+ len = led_trigger_format(data, len + 1, led_cdev);
+
+ up_read(&led_cdev->trigger_lock);
+ up_read(&triggers_list_lock);
+
+ len = memory_read_from_buffer(buf, count, &pos, data, len);
+
+ kvfree(data);
+
+ return len;
+}
+EXPORT_SYMBOL_GPL(led_trigger_read);
+
+/* Caller must ensure led_cdev->trigger_lock held */
+int led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trig)
+{
+ char *event = NULL;
+ char *envp[2];
+ const char *name;
+ int ret;
+
+ if (!led_cdev->trigger && !trig)
+ return 0;
+
+ name = trig ? trig->name : "none";
+ event = kasprintf(GFP_KERNEL, "TRIGGER=%s", name);
+
+ /* Remove any existing trigger */
+ if (led_cdev->trigger) {
+ spin_lock(&led_cdev->trigger->leddev_list_lock);
+ list_del_rcu(&led_cdev->trig_list);
+ spin_unlock(&led_cdev->trigger->leddev_list_lock);
+
+ /* ensure it's no longer visible on the led_cdevs list */
+ synchronize_rcu();
+
+ cancel_work_sync(&led_cdev->set_brightness_work);
+ led_stop_software_blink(led_cdev);
+ if (led_cdev->trigger->deactivate)
+ led_cdev->trigger->deactivate(led_cdev);
+ device_remove_groups(led_cdev->dev, led_cdev->trigger->groups);
+ led_cdev->trigger = NULL;
+ led_cdev->trigger_data = NULL;
+ led_cdev->activated = false;
+ led_set_brightness(led_cdev, LED_OFF);
+ }
+ if (trig) {
+ spin_lock(&trig->leddev_list_lock);
+ list_add_tail_rcu(&led_cdev->trig_list, &trig->led_cdevs);
+ spin_unlock(&trig->leddev_list_lock);
+ led_cdev->trigger = trig;
+
+ if (trig->activate)
+ ret = trig->activate(led_cdev);
+ else
+ ret = 0;
+
+ if (ret)
+ goto err_activate;
+
+ ret = device_add_groups(led_cdev->dev, trig->groups);
+ if (ret) {
+ dev_err(led_cdev->dev, "Failed to add trigger attributes\n");
+ goto err_add_groups;
+ }
+ }
+
+ if (event) {
+ envp[0] = event;
+ envp[1] = NULL;
+ if (kobject_uevent_env(&led_cdev->dev->kobj, KOBJ_CHANGE, envp))
+ dev_err(led_cdev->dev,
+ "%s: Error sending uevent\n", __func__);
+ kfree(event);
+ }
+
+ return 0;
+
+err_add_groups:
+
+ if (trig->deactivate)
+ trig->deactivate(led_cdev);
+err_activate:
+
+ spin_lock(&led_cdev->trigger->leddev_list_lock);
+ list_del_rcu(&led_cdev->trig_list);
+ spin_unlock(&led_cdev->trigger->leddev_list_lock);
+ synchronize_rcu();
+ led_cdev->trigger = NULL;
+ led_cdev->trigger_data = NULL;
+ led_set_brightness(led_cdev, LED_OFF);
+ kfree(event);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(led_trigger_set);
+
+void led_trigger_remove(struct led_classdev *led_cdev)
+{
+ down_write(&led_cdev->trigger_lock);
+ led_trigger_set(led_cdev, NULL);
+ up_write(&led_cdev->trigger_lock);
+}
+EXPORT_SYMBOL_GPL(led_trigger_remove);
+
+void led_trigger_set_default(struct led_classdev *led_cdev)
+{
+ struct led_trigger *trig;
+
+ if (!led_cdev->default_trigger)
+ return;
+
+ down_read(&triggers_list_lock);
+ down_write(&led_cdev->trigger_lock);
+ list_for_each_entry(trig, &trigger_list, next_trig) {
+ if (!strcmp(led_cdev->default_trigger, trig->name) &&
+ trigger_relevant(led_cdev, trig)) {
+ led_cdev->flags |= LED_INIT_DEFAULT_TRIGGER;
+ led_trigger_set(led_cdev, trig);
+ break;
+ }
+ }
+ up_write(&led_cdev->trigger_lock);
+ up_read(&triggers_list_lock);
+}
+EXPORT_SYMBOL_GPL(led_trigger_set_default);
+
+void led_trigger_rename_static(const char *name, struct led_trigger *trig)
+{
+ /* new name must be on a temporary string to prevent races */
+ BUG_ON(name == trig->name);
+
+ down_write(&triggers_list_lock);
+ /* this assumes that trig->name was originaly allocated to
+ * non constant storage */
+ strcpy((char *)trig->name, name);
+ up_write(&triggers_list_lock);
+}
+EXPORT_SYMBOL_GPL(led_trigger_rename_static);
+
+/* LED Trigger Interface */
+
+int led_trigger_register(struct led_trigger *trig)
+{
+ struct led_classdev *led_cdev;
+ struct led_trigger *_trig;
+
+ spin_lock_init(&trig->leddev_list_lock);
+ INIT_LIST_HEAD(&trig->led_cdevs);
+
+ down_write(&triggers_list_lock);
+ /* Make sure the trigger's name isn't already in use */
+ list_for_each_entry(_trig, &trigger_list, next_trig) {
+ if (!strcmp(_trig->name, trig->name) &&
+ (trig->trigger_type == _trig->trigger_type ||
+ !trig->trigger_type || !_trig->trigger_type)) {
+ up_write(&triggers_list_lock);
+ return -EEXIST;
+ }
+ }
+ /* Add to the list of led triggers */
+ list_add_tail(&trig->next_trig, &trigger_list);
+ up_write(&triggers_list_lock);
+
+ /* Register with any LEDs that have this as a default trigger */
+ down_read(&leds_list_lock);
+ list_for_each_entry(led_cdev, &leds_list, node) {
+ down_write(&led_cdev->trigger_lock);
+ if (!led_cdev->trigger && led_cdev->default_trigger &&
+ !strcmp(led_cdev->default_trigger, trig->name) &&
+ trigger_relevant(led_cdev, trig)) {
+ led_cdev->flags |= LED_INIT_DEFAULT_TRIGGER;
+ led_trigger_set(led_cdev, trig);
+ }
+ up_write(&led_cdev->trigger_lock);
+ }
+ up_read(&leds_list_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(led_trigger_register);
+
+void led_trigger_unregister(struct led_trigger *trig)
+{
+ struct led_classdev *led_cdev;
+
+ if (list_empty_careful(&trig->next_trig))
+ return;
+
+ /* Remove from the list of led triggers */
+ down_write(&triggers_list_lock);
+ list_del_init(&trig->next_trig);
+ up_write(&triggers_list_lock);
+
+ /* Remove anyone actively using this trigger */
+ down_read(&leds_list_lock);
+ list_for_each_entry(led_cdev, &leds_list, node) {
+ down_write(&led_cdev->trigger_lock);
+ if (led_cdev->trigger == trig)
+ led_trigger_set(led_cdev, NULL);
+ up_write(&led_cdev->trigger_lock);
+ }
+ up_read(&leds_list_lock);
+}
+EXPORT_SYMBOL_GPL(led_trigger_unregister);
+
+static void devm_led_trigger_release(struct device *dev, void *res)
+{
+ led_trigger_unregister(*(struct led_trigger **)res);
+}
+
+int devm_led_trigger_register(struct device *dev,
+ struct led_trigger *trig)
+{
+ struct led_trigger **dr;
+ int rc;
+
+ dr = devres_alloc(devm_led_trigger_release, sizeof(*dr),
+ GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ *dr = trig;
+
+ rc = led_trigger_register(trig);
+ if (rc)
+ devres_free(dr);
+ else
+ devres_add(dev, dr);
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(devm_led_trigger_register);
+
+/* Simple LED Trigger Interface */
+
+void led_trigger_event(struct led_trigger *trig,
+ enum led_brightness brightness)
+{
+ struct led_classdev *led_cdev;
+
+ if (!trig)
+ return;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(led_cdev, &trig->led_cdevs, trig_list)
+ led_set_brightness(led_cdev, brightness);
+ rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(led_trigger_event);
+
+static void led_trigger_blink_setup(struct led_trigger *trig,
+ unsigned long *delay_on,
+ unsigned long *delay_off,
+ int oneshot,
+ int invert)
+{
+ struct led_classdev *led_cdev;
+
+ if (!trig)
+ return;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(led_cdev, &trig->led_cdevs, trig_list) {
+ if (oneshot)
+ led_blink_set_oneshot(led_cdev, delay_on, delay_off,
+ invert);
+ else
+ led_blink_set(led_cdev, delay_on, delay_off);
+ }
+ rcu_read_unlock();
+}
+
+void led_trigger_blink(struct led_trigger *trig,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ led_trigger_blink_setup(trig, delay_on, delay_off, 0, 0);
+}
+EXPORT_SYMBOL_GPL(led_trigger_blink);
+
+void led_trigger_blink_oneshot(struct led_trigger *trig,
+ unsigned long *delay_on,
+ unsigned long *delay_off,
+ int invert)
+{
+ led_trigger_blink_setup(trig, delay_on, delay_off, 1, invert);
+}
+EXPORT_SYMBOL_GPL(led_trigger_blink_oneshot);
+
+void led_trigger_register_simple(const char *name, struct led_trigger **tp)
+{
+ struct led_trigger *trig;
+ int err;
+
+ trig = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
+
+ if (trig) {
+ trig->name = name;
+ err = led_trigger_register(trig);
+ if (err < 0) {
+ kfree(trig);
+ trig = NULL;
+ pr_warn("LED trigger %s failed to register (%d)\n",
+ name, err);
+ }
+ } else {
+ pr_warn("LED trigger %s failed to register (no memory)\n",
+ name);
+ }
+ *tp = trig;
+}
+EXPORT_SYMBOL_GPL(led_trigger_register_simple);
+
+void led_trigger_unregister_simple(struct led_trigger *trig)
+{
+ if (trig)
+ led_trigger_unregister(trig);
+ kfree(trig);
+}
+EXPORT_SYMBOL_GPL(led_trigger_unregister_simple);
diff --git a/drivers/leds/leds-88pm860x.c b/drivers/leds/leds-88pm860x.c
new file mode 100644
index 000000000..508d0d859
--- /dev/null
+++ b/drivers/leds/leds-88pm860x.c
@@ -0,0 +1,240 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED driver for Marvell 88PM860x
+ *
+ * Copyright (C) 2009 Marvell International Ltd.
+ * Haojian Zhuang <haojian.zhuang@marvell.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+#include <linux/mfd/88pm860x.h>
+#include <linux/module.h>
+
+#define LED_PWM_MASK (0x1F)
+#define LED_CURRENT_MASK (0x07 << 5)
+
+#define LED_BLINK_MASK (0x7F)
+
+#define LED_ON_CONTINUOUS (0x0F << 3)
+
+#define LED1_BLINK_EN (1 << 1)
+#define LED2_BLINK_EN (1 << 2)
+
+struct pm860x_led {
+ struct led_classdev cdev;
+ struct i2c_client *i2c;
+ struct pm860x_chip *chip;
+ struct mutex lock;
+ char name[MFD_NAME_SIZE];
+
+ int port;
+ int iset;
+ unsigned char brightness;
+ unsigned char current_brightness;
+
+ int reg_control;
+ int reg_blink;
+ int blink_mask;
+};
+
+static int led_power_set(struct pm860x_chip *chip, int port, int on)
+{
+ int ret = -EINVAL;
+
+ switch (port) {
+ case 0:
+ case 1:
+ case 2:
+ ret = on ? pm8606_osc_enable(chip, RGB1_ENABLE) :
+ pm8606_osc_disable(chip, RGB1_ENABLE);
+ break;
+ case 3:
+ case 4:
+ case 5:
+ ret = on ? pm8606_osc_enable(chip, RGB2_ENABLE) :
+ pm8606_osc_disable(chip, RGB2_ENABLE);
+ break;
+ }
+ return ret;
+}
+
+static int pm860x_led_set(struct led_classdev *cdev,
+ enum led_brightness value)
+{
+ struct pm860x_led *led = container_of(cdev, struct pm860x_led, cdev);
+ struct pm860x_chip *chip;
+ unsigned char buf[3];
+ int ret;
+
+ chip = led->chip;
+ mutex_lock(&led->lock);
+ led->brightness = value >> 3;
+
+ if ((led->current_brightness == 0) && led->brightness) {
+ led_power_set(chip, led->port, 1);
+ if (led->iset) {
+ pm860x_set_bits(led->i2c, led->reg_control,
+ LED_CURRENT_MASK, led->iset);
+ }
+ pm860x_set_bits(led->i2c, led->reg_blink,
+ LED_BLINK_MASK, LED_ON_CONTINUOUS);
+ pm860x_set_bits(led->i2c, PM8606_WLED3B, led->blink_mask,
+ led->blink_mask);
+ }
+ pm860x_set_bits(led->i2c, led->reg_control, LED_PWM_MASK,
+ led->brightness);
+
+ if (led->brightness == 0) {
+ pm860x_bulk_read(led->i2c, led->reg_control, 3, buf);
+ ret = buf[0] & LED_PWM_MASK;
+ ret |= buf[1] & LED_PWM_MASK;
+ ret |= buf[2] & LED_PWM_MASK;
+ if (ret == 0) {
+ /* unset current since no led is lighting */
+ pm860x_set_bits(led->i2c, led->reg_control,
+ LED_CURRENT_MASK, 0);
+ pm860x_set_bits(led->i2c, PM8606_WLED3B,
+ led->blink_mask, 0);
+ led_power_set(chip, led->port, 0);
+ }
+ }
+ led->current_brightness = led->brightness;
+ dev_dbg(chip->dev, "Update LED. (reg:%d, brightness:%d)\n",
+ led->reg_control, led->brightness);
+ mutex_unlock(&led->lock);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static int pm860x_led_dt_init(struct platform_device *pdev,
+ struct pm860x_led *data)
+{
+ struct device_node *nproot, *np;
+ int iset = 0;
+
+ if (!dev_of_node(pdev->dev.parent))
+ return -ENODEV;
+ nproot = of_get_child_by_name(dev_of_node(pdev->dev.parent), "leds");
+ if (!nproot) {
+ dev_err(&pdev->dev, "failed to find leds node\n");
+ return -ENODEV;
+ }
+ for_each_available_child_of_node(nproot, np) {
+ if (of_node_name_eq(np, data->name)) {
+ of_property_read_u32(np, "marvell,88pm860x-iset",
+ &iset);
+ data->iset = PM8606_LED_CURRENT(iset);
+ of_node_put(np);
+ break;
+ }
+ }
+ of_node_put(nproot);
+ return 0;
+}
+#else
+#define pm860x_led_dt_init(x, y) (-1)
+#endif
+
+static int pm860x_led_probe(struct platform_device *pdev)
+{
+ struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+ struct pm860x_led_pdata *pdata = dev_get_platdata(&pdev->dev);
+ struct pm860x_led *data;
+ struct resource *res;
+ int ret = 0;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_led), GFP_KERNEL);
+ if (data == NULL)
+ return -ENOMEM;
+ res = platform_get_resource_byname(pdev, IORESOURCE_REG, "control");
+ if (!res) {
+ dev_err(&pdev->dev, "No REG resource for control\n");
+ return -ENXIO;
+ }
+ data->reg_control = res->start;
+ res = platform_get_resource_byname(pdev, IORESOURCE_REG, "blink");
+ if (!res) {
+ dev_err(&pdev->dev, "No REG resource for blink\n");
+ return -ENXIO;
+ }
+ data->reg_blink = res->start;
+ memset(data->name, 0, MFD_NAME_SIZE);
+ switch (pdev->id) {
+ case 0:
+ data->blink_mask = LED1_BLINK_EN;
+ sprintf(data->name, "led0-red");
+ break;
+ case 1:
+ data->blink_mask = LED1_BLINK_EN;
+ sprintf(data->name, "led0-green");
+ break;
+ case 2:
+ data->blink_mask = LED1_BLINK_EN;
+ sprintf(data->name, "led0-blue");
+ break;
+ case 3:
+ data->blink_mask = LED2_BLINK_EN;
+ sprintf(data->name, "led1-red");
+ break;
+ case 4:
+ data->blink_mask = LED2_BLINK_EN;
+ sprintf(data->name, "led1-green");
+ break;
+ case 5:
+ data->blink_mask = LED2_BLINK_EN;
+ sprintf(data->name, "led1-blue");
+ break;
+ }
+ data->chip = chip;
+ data->i2c = (chip->id == CHIP_PM8606) ? chip->client : chip->companion;
+ data->port = pdev->id;
+ if (pm860x_led_dt_init(pdev, data))
+ if (pdata)
+ data->iset = pdata->iset;
+
+ data->current_brightness = 0;
+ data->cdev.name = data->name;
+ data->cdev.brightness_set_blocking = pm860x_led_set;
+ mutex_init(&data->lock);
+
+ ret = led_classdev_register(chip->dev, &data->cdev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to register LED: %d\n", ret);
+ return ret;
+ }
+ pm860x_led_set(&data->cdev, 0);
+
+ platform_set_drvdata(pdev, data);
+
+ return 0;
+}
+
+static int pm860x_led_remove(struct platform_device *pdev)
+{
+ struct pm860x_led *data = platform_get_drvdata(pdev);
+
+ led_classdev_unregister(&data->cdev);
+
+ return 0;
+}
+
+static struct platform_driver pm860x_led_driver = {
+ .driver = {
+ .name = "88pm860x-led",
+ },
+ .probe = pm860x_led_probe,
+ .remove = pm860x_led_remove,
+};
+
+module_platform_driver(pm860x_led_driver);
+
+MODULE_DESCRIPTION("LED driver for Marvell PM860x");
+MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:88pm860x-led");
diff --git a/drivers/leds/leds-acer-a500.c b/drivers/leds/leds-acer-a500.c
new file mode 100644
index 000000000..8cf0b11f4
--- /dev/null
+++ b/drivers/leds/leds-acer-a500.c
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define A500_EC_LED_DELAY_USEC (100 * 1000)
+
+enum {
+ REG_RESET_LEDS = 0x40,
+ REG_POWER_LED_ON = 0x42,
+ REG_CHARGE_LED_ON = 0x43,
+ REG_ANDROID_LEDS_OFF = 0x5a,
+};
+
+struct a500_led {
+ struct led_classdev cdev;
+ const struct reg_sequence *enable_seq;
+ struct a500_led *other;
+ struct regmap *rmap;
+};
+
+static const struct reg_sequence a500_ec_leds_reset_seq[] = {
+ REG_SEQ(REG_RESET_LEDS, 0x0, A500_EC_LED_DELAY_USEC),
+ REG_SEQ(REG_ANDROID_LEDS_OFF, 0x0, A500_EC_LED_DELAY_USEC),
+};
+
+static const struct reg_sequence a500_ec_white_led_enable_seq[] = {
+ REG_SEQ(REG_POWER_LED_ON, 0x0, A500_EC_LED_DELAY_USEC),
+};
+
+static const struct reg_sequence a500_ec_orange_led_enable_seq[] = {
+ REG_SEQ(REG_CHARGE_LED_ON, 0x0, A500_EC_LED_DELAY_USEC),
+};
+
+static int a500_ec_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct a500_led *led = container_of(led_cdev, struct a500_led, cdev);
+ struct reg_sequence control_seq[2];
+ unsigned int num_regs = 1;
+
+ if (value) {
+ control_seq[0] = led->enable_seq[0];
+ } else {
+ /*
+ * There is no separate controls which can disable LEDs
+ * individually, there is only RESET_LEDS command that turns
+ * off both LEDs.
+ *
+ * RESET_LEDS turns off both LEDs, thus restore other LED if
+ * it's turned ON.
+ */
+ if (led->other->cdev.brightness)
+ num_regs = 2;
+
+ control_seq[0] = a500_ec_leds_reset_seq[0];
+ control_seq[1] = led->other->enable_seq[0];
+ }
+
+ return regmap_multi_reg_write(led->rmap, control_seq, num_regs);
+}
+
+static int a500_ec_leds_probe(struct platform_device *pdev)
+{
+ struct a500_led *white_led, *orange_led;
+ struct regmap *rmap;
+ int err;
+
+ rmap = dev_get_regmap(pdev->dev.parent, "KB930");
+ if (!rmap)
+ return -EINVAL;
+
+ /* reset and turn off LEDs */
+ regmap_multi_reg_write(rmap, a500_ec_leds_reset_seq, 2);
+
+ white_led = devm_kzalloc(&pdev->dev, sizeof(*white_led), GFP_KERNEL);
+ if (!white_led)
+ return -ENOMEM;
+
+ white_led->cdev.name = "power:white";
+ white_led->cdev.brightness_set_blocking = a500_ec_led_brightness_set;
+ white_led->cdev.flags = LED_CORE_SUSPENDRESUME;
+ white_led->cdev.max_brightness = 1;
+ white_led->enable_seq = a500_ec_white_led_enable_seq;
+ white_led->rmap = rmap;
+
+ orange_led = devm_kzalloc(&pdev->dev, sizeof(*orange_led), GFP_KERNEL);
+ if (!orange_led)
+ return -ENOMEM;
+
+ orange_led->cdev.name = "power:orange";
+ orange_led->cdev.brightness_set_blocking = a500_ec_led_brightness_set;
+ orange_led->cdev.flags = LED_CORE_SUSPENDRESUME;
+ orange_led->cdev.max_brightness = 1;
+ orange_led->enable_seq = a500_ec_orange_led_enable_seq;
+ orange_led->rmap = rmap;
+
+ white_led->other = orange_led;
+ orange_led->other = white_led;
+
+ err = devm_led_classdev_register(&pdev->dev, &white_led->cdev);
+ if (err) {
+ dev_err(&pdev->dev, "failed to register white LED\n");
+ return err;
+ }
+
+ err = devm_led_classdev_register(&pdev->dev, &orange_led->cdev);
+ if (err) {
+ dev_err(&pdev->dev, "failed to register orange LED\n");
+ return err;
+ }
+
+ return 0;
+}
+
+static struct platform_driver a500_ec_leds_driver = {
+ .driver = {
+ .name = "acer-a500-iconia-leds",
+ },
+ .probe = a500_ec_leds_probe,
+};
+module_platform_driver(a500_ec_leds_driver);
+
+MODULE_DESCRIPTION("LED driver for Acer Iconia Tab A500 Power Button");
+MODULE_AUTHOR("Dmitry Osipenko <digetx@gmail.com>");
+MODULE_ALIAS("platform:acer-a500-iconia-leds");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-adp5520.c b/drivers/leds/leds-adp5520.c
new file mode 100644
index 000000000..5a0cc7af2
--- /dev/null
+++ b/drivers/leds/leds-adp5520.c
@@ -0,0 +1,197 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs
+ *
+ * Copyright 2009 Analog Devices Inc.
+ *
+ * Loosely derived from leds-da903x:
+ * Copyright (C) 2008 Compulab, Ltd.
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ * Eric Miao <eric.miao@marvell.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/mfd/adp5520.h>
+#include <linux/slab.h>
+
+struct adp5520_led {
+ struct led_classdev cdev;
+ struct device *master;
+ int id;
+ int flags;
+};
+
+static int adp5520_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct adp5520_led *led;
+
+ led = container_of(led_cdev, struct adp5520_led, cdev);
+ return adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1,
+ value >> 2);
+}
+
+static int adp5520_led_setup(struct adp5520_led *led)
+{
+ struct device *dev = led->master;
+ int flags = led->flags;
+ int ret = 0;
+
+ switch (led->id) {
+ case FLAG_ID_ADP5520_LED1_ADP5501_LED0:
+ ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
+ (flags >> ADP5520_FLAG_OFFT_SHIFT) &
+ ADP5520_FLAG_OFFT_MASK);
+ ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
+ ADP5520_LED1_EN);
+ break;
+ case FLAG_ID_ADP5520_LED2_ADP5501_LED1:
+ ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
+ ((flags >> ADP5520_FLAG_OFFT_SHIFT) &
+ ADP5520_FLAG_OFFT_MASK) << 2);
+ ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
+ ADP5520_R3_MODE);
+ ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
+ ADP5520_LED2_EN);
+ break;
+ case FLAG_ID_ADP5520_LED3_ADP5501_LED2:
+ ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
+ ((flags >> ADP5520_FLAG_OFFT_SHIFT) &
+ ADP5520_FLAG_OFFT_MASK) << 4);
+ ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
+ ADP5520_C3_MODE);
+ ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
+ ADP5520_LED3_EN);
+ break;
+ }
+
+ return ret;
+}
+
+static int adp5520_led_prepare(struct platform_device *pdev)
+{
+ struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct device *dev = pdev->dev.parent;
+ int ret = 0;
+
+ ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0);
+ ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0);
+ ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0);
+ ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6);
+ ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in,
+ pdata->fade_out));
+
+ return ret;
+}
+
+static int adp5520_led_probe(struct platform_device *pdev)
+{
+ struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct adp5520_led *led, *led_dat;
+ struct led_info *cur_led;
+ int ret, i;
+
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "missing platform data\n");
+ return -ENODEV;
+ }
+
+ if (pdata->num_leds > ADP5520_01_MAXLEDS) {
+ dev_err(&pdev->dev, "can't handle more than %d LEDS\n",
+ ADP5520_01_MAXLEDS);
+ return -EFAULT;
+ }
+
+ led = devm_kcalloc(&pdev->dev, pdata->num_leds, sizeof(*led),
+ GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ ret = adp5520_led_prepare(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to write\n");
+ return ret;
+ }
+
+ for (i = 0; i < pdata->num_leds; ++i) {
+ cur_led = &pdata->leds[i];
+ led_dat = &led[i];
+
+ led_dat->cdev.name = cur_led->name;
+ led_dat->cdev.default_trigger = cur_led->default_trigger;
+ led_dat->cdev.brightness_set_blocking = adp5520_led_set;
+ led_dat->cdev.brightness = LED_OFF;
+
+ if (cur_led->flags & ADP5520_FLAG_LED_MASK)
+ led_dat->flags = cur_led->flags;
+ else
+ led_dat->flags = i + 1;
+
+ led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK;
+
+ led_dat->master = pdev->dev.parent;
+
+ ret = led_classdev_register(led_dat->master, &led_dat->cdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register LED %d\n",
+ led_dat->id);
+ goto err;
+ }
+
+ ret = adp5520_led_setup(led_dat);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to write\n");
+ i++;
+ goto err;
+ }
+ }
+
+ platform_set_drvdata(pdev, led);
+ return 0;
+
+err:
+ if (i > 0) {
+ for (i = i - 1; i >= 0; i--)
+ led_classdev_unregister(&led[i].cdev);
+ }
+
+ return ret;
+}
+
+static int adp5520_led_remove(struct platform_device *pdev)
+{
+ struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct adp5520_led *led;
+ int i;
+
+ led = platform_get_drvdata(pdev);
+
+ adp5520_clr_bits(led->master, ADP5520_LED_CONTROL,
+ ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN);
+
+ for (i = 0; i < pdata->num_leds; i++) {
+ led_classdev_unregister(&led[i].cdev);
+ }
+
+ return 0;
+}
+
+static struct platform_driver adp5520_led_driver = {
+ .driver = {
+ .name = "adp5520-led",
+ },
+ .probe = adp5520_led_probe,
+ .remove = adp5520_led_remove,
+};
+
+module_platform_driver(adp5520_led_driver);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:adp5520-led");
diff --git a/drivers/leds/leds-an30259a.c b/drivers/leds/leds-an30259a.c
new file mode 100644
index 000000000..e072ee540
--- /dev/null
+++ b/drivers/leds/leds-an30259a.c
@@ -0,0 +1,371 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Driver for Panasonic AN30259A 3-channel LED driver
+//
+// Copyright (c) 2018 Simon Shields <simon@lineageos.org>
+//
+// Datasheet:
+// https://www.alliedelec.com/m/d/a9d2b3ee87c2d1a535a41dd747b1c247.pdf
+
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#define AN30259A_MAX_LEDS 3
+
+#define AN30259A_REG_SRESET 0x00
+#define AN30259A_LED_SRESET BIT(0)
+
+/* LED power registers */
+#define AN30259A_REG_LED_ON 0x01
+#define AN30259A_LED_EN(x) BIT((x) - 1)
+#define AN30259A_LED_SLOPE(x) BIT(((x) - 1) + 4)
+
+#define AN30259A_REG_LEDCC(x) (0x03 + ((x) - 1))
+
+/* slope control registers */
+#define AN30259A_REG_SLOPE(x) (0x06 + ((x) - 1))
+#define AN30259A_LED_SLOPETIME1(x) (x)
+#define AN30259A_LED_SLOPETIME2(x) ((x) << 4)
+
+#define AN30259A_REG_LEDCNT1(x) (0x09 + (4 * ((x) - 1)))
+#define AN30259A_LED_DUTYMAX(x) ((x) << 4)
+#define AN30259A_LED_DUTYMID(x) (x)
+
+#define AN30259A_REG_LEDCNT2(x) (0x0A + (4 * ((x) - 1)))
+#define AN30259A_LED_DELAY(x) ((x) << 4)
+#define AN30259A_LED_DUTYMIN(x) (x)
+
+/* detention time control (length of each slope step) */
+#define AN30259A_REG_LEDCNT3(x) (0x0B + (4 * ((x) - 1)))
+#define AN30259A_LED_DT1(x) (x)
+#define AN30259A_LED_DT2(x) ((x) << 4)
+
+#define AN30259A_REG_LEDCNT4(x) (0x0C + (4 * ((x) - 1)))
+#define AN30259A_LED_DT3(x) (x)
+#define AN30259A_LED_DT4(x) ((x) << 4)
+
+#define AN30259A_REG_MAX 0x14
+
+#define AN30259A_BLINK_MAX_TIME 7500 /* ms */
+#define AN30259A_SLOPE_RESOLUTION 500 /* ms */
+
+#define AN30259A_NAME "an30259a"
+
+#define STATE_OFF 0
+#define STATE_KEEP 1
+#define STATE_ON 2
+
+struct an30259a;
+
+struct an30259a_led {
+ struct an30259a *chip;
+ struct fwnode_handle *fwnode;
+ struct led_classdev cdev;
+ u32 num;
+ u32 default_state;
+ bool sloping;
+};
+
+struct an30259a {
+ struct mutex mutex; /* held when writing to registers */
+ struct i2c_client *client;
+ struct an30259a_led leds[AN30259A_MAX_LEDS];
+ struct regmap *regmap;
+ int num_leds;
+};
+
+static int an30259a_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct an30259a_led *led;
+ int ret;
+ unsigned int led_on;
+
+ led = container_of(cdev, struct an30259a_led, cdev);
+ mutex_lock(&led->chip->mutex);
+
+ ret = regmap_read(led->chip->regmap, AN30259A_REG_LED_ON, &led_on);
+ if (ret)
+ goto error;
+
+ switch (brightness) {
+ case LED_OFF:
+ led_on &= ~AN30259A_LED_EN(led->num);
+ led_on &= ~AN30259A_LED_SLOPE(led->num);
+ led->sloping = false;
+ break;
+ default:
+ led_on |= AN30259A_LED_EN(led->num);
+ if (led->sloping)
+ led_on |= AN30259A_LED_SLOPE(led->num);
+ ret = regmap_write(led->chip->regmap,
+ AN30259A_REG_LEDCNT1(led->num),
+ AN30259A_LED_DUTYMAX(0xf) |
+ AN30259A_LED_DUTYMID(0xf));
+ if (ret)
+ goto error;
+ break;
+ }
+
+ ret = regmap_write(led->chip->regmap, AN30259A_REG_LED_ON, led_on);
+ if (ret)
+ goto error;
+
+ ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCC(led->num),
+ brightness);
+
+error:
+ mutex_unlock(&led->chip->mutex);
+
+ return ret;
+}
+
+static int an30259a_blink_set(struct led_classdev *cdev,
+ unsigned long *delay_off, unsigned long *delay_on)
+{
+ struct an30259a_led *led;
+ int ret, num;
+ unsigned int led_on;
+ unsigned long off = *delay_off, on = *delay_on;
+
+ led = container_of(cdev, struct an30259a_led, cdev);
+
+ mutex_lock(&led->chip->mutex);
+ num = led->num;
+
+ /* slope time can only be a multiple of 500ms. */
+ if (off % AN30259A_SLOPE_RESOLUTION || on % AN30259A_SLOPE_RESOLUTION) {
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* up to a maximum of 7500ms. */
+ if (off > AN30259A_BLINK_MAX_TIME || on > AN30259A_BLINK_MAX_TIME) {
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* if no blink specified, default to 1 Hz. */
+ if (!off && !on) {
+ *delay_off = off = 500;
+ *delay_on = on = 500;
+ }
+
+ /* convert into values the HW will understand. */
+ off /= AN30259A_SLOPE_RESOLUTION;
+ on /= AN30259A_SLOPE_RESOLUTION;
+
+ /* duty min should be zero (=off), delay should be zero. */
+ ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCNT2(num),
+ AN30259A_LED_DELAY(0) | AN30259A_LED_DUTYMIN(0));
+ if (ret)
+ goto error;
+
+ /* reset detention time (no "breathing" effect). */
+ ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCNT3(num),
+ AN30259A_LED_DT1(0) | AN30259A_LED_DT2(0));
+ if (ret)
+ goto error;
+ ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCNT4(num),
+ AN30259A_LED_DT3(0) | AN30259A_LED_DT4(0));
+ if (ret)
+ goto error;
+
+ /* slope time controls on/off cycle length. */
+ ret = regmap_write(led->chip->regmap, AN30259A_REG_SLOPE(num),
+ AN30259A_LED_SLOPETIME1(off) |
+ AN30259A_LED_SLOPETIME2(on));
+ if (ret)
+ goto error;
+
+ /* Finally, enable slope mode. */
+ ret = regmap_read(led->chip->regmap, AN30259A_REG_LED_ON, &led_on);
+ if (ret)
+ goto error;
+
+ led_on |= AN30259A_LED_SLOPE(num) | AN30259A_LED_EN(led->num);
+
+ ret = regmap_write(led->chip->regmap, AN30259A_REG_LED_ON, led_on);
+
+ if (!ret)
+ led->sloping = true;
+error:
+ mutex_unlock(&led->chip->mutex);
+
+ return ret;
+}
+
+static int an30259a_dt_init(struct i2c_client *client,
+ struct an30259a *chip)
+{
+ struct device_node *np = dev_of_node(&client->dev), *child;
+ int count, ret;
+ int i = 0;
+ const char *str;
+ struct an30259a_led *led;
+
+ count = of_get_available_child_count(np);
+ if (!count || count > AN30259A_MAX_LEDS)
+ return -EINVAL;
+
+ for_each_available_child_of_node(np, child) {
+ u32 source;
+
+ ret = of_property_read_u32(child, "reg", &source);
+ if (ret != 0 || !source || source > AN30259A_MAX_LEDS) {
+ dev_err(&client->dev, "Couldn't read LED address: %d\n",
+ ret);
+ count--;
+ continue;
+ }
+
+ led = &chip->leds[i];
+
+ led->num = source;
+ led->chip = chip;
+ led->fwnode = of_fwnode_handle(child);
+
+ if (!of_property_read_string(child, "default-state", &str)) {
+ if (!strcmp(str, "on"))
+ led->default_state = STATE_ON;
+ else if (!strcmp(str, "keep"))
+ led->default_state = STATE_KEEP;
+ else
+ led->default_state = STATE_OFF;
+ }
+
+ i++;
+ }
+
+ if (!count)
+ return -EINVAL;
+
+ chip->num_leds = i;
+
+ return 0;
+}
+
+static const struct regmap_config an30259a_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = AN30259A_REG_MAX,
+};
+
+static void an30259a_init_default_state(struct an30259a_led *led)
+{
+ struct an30259a *chip = led->chip;
+ int led_on, err;
+
+ switch (led->default_state) {
+ case STATE_ON:
+ led->cdev.brightness = LED_FULL;
+ break;
+ case STATE_KEEP:
+ err = regmap_read(chip->regmap, AN30259A_REG_LED_ON, &led_on);
+ if (err)
+ break;
+
+ if (!(led_on & AN30259A_LED_EN(led->num))) {
+ led->cdev.brightness = LED_OFF;
+ break;
+ }
+ regmap_read(chip->regmap, AN30259A_REG_LEDCC(led->num),
+ &led->cdev.brightness);
+ break;
+ default:
+ led->cdev.brightness = LED_OFF;
+ }
+
+ an30259a_brightness_set(&led->cdev, led->cdev.brightness);
+}
+
+static int an30259a_probe(struct i2c_client *client)
+{
+ struct an30259a *chip;
+ int i, err;
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ err = an30259a_dt_init(client, chip);
+ if (err < 0)
+ return err;
+
+ mutex_init(&chip->mutex);
+ chip->client = client;
+ i2c_set_clientdata(client, chip);
+
+ chip->regmap = devm_regmap_init_i2c(client, &an30259a_regmap_config);
+
+ if (IS_ERR(chip->regmap)) {
+ err = PTR_ERR(chip->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ err);
+ goto exit;
+ }
+
+ for (i = 0; i < chip->num_leds; i++) {
+ struct led_init_data init_data = {};
+
+ an30259a_init_default_state(&chip->leds[i]);
+ chip->leds[i].cdev.brightness_set_blocking =
+ an30259a_brightness_set;
+ chip->leds[i].cdev.blink_set = an30259a_blink_set;
+
+ init_data.fwnode = chip->leds[i].fwnode;
+ init_data.devicename = AN30259A_NAME;
+ init_data.default_label = ":";
+
+ err = devm_led_classdev_register_ext(&client->dev,
+ &chip->leds[i].cdev,
+ &init_data);
+ if (err < 0)
+ goto exit;
+ }
+ return 0;
+
+exit:
+ mutex_destroy(&chip->mutex);
+ return err;
+}
+
+static void an30259a_remove(struct i2c_client *client)
+{
+ struct an30259a *chip = i2c_get_clientdata(client);
+
+ mutex_destroy(&chip->mutex);
+}
+
+static const struct of_device_id an30259a_match_table[] = {
+ { .compatible = "panasonic,an30259a", },
+ { /* sentinel */ },
+};
+
+MODULE_DEVICE_TABLE(of, an30259a_match_table);
+
+static const struct i2c_device_id an30259a_id[] = {
+ { "an30259a", 0 },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(i2c, an30259a_id);
+
+static struct i2c_driver an30259a_driver = {
+ .driver = {
+ .name = "leds-an30259a",
+ .of_match_table = of_match_ptr(an30259a_match_table),
+ },
+ .probe_new = an30259a_probe,
+ .remove = an30259a_remove,
+ .id_table = an30259a_id,
+};
+
+module_i2c_driver(an30259a_driver);
+
+MODULE_AUTHOR("Simon Shields <simon@lineageos.org>");
+MODULE_DESCRIPTION("AN30259A LED driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-apu.c b/drivers/leds/leds-apu.c
new file mode 100644
index 000000000..c409b80c2
--- /dev/null
+++ b/drivers/leds/leds-apu.c
@@ -0,0 +1,222 @@
+/*
+ * drivers/leds/leds-apu.c
+ * Copyright (C) 2017 Alan Mizrahi, alan at mizrahi dot com dot ve
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/dmi.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#define APU1_FCH_ACPI_MMIO_BASE 0xFED80000
+#define APU1_FCH_GPIO_BASE (APU1_FCH_ACPI_MMIO_BASE + 0x01BD)
+#define APU1_LEDON 0x08
+#define APU1_LEDOFF 0xC8
+#define APU1_NUM_GPIO 3
+#define APU1_IOSIZE sizeof(u8)
+
+/* LED access parameters */
+struct apu_param {
+ void __iomem *addr; /* for ioread/iowrite */
+};
+
+/* LED private data */
+struct apu_led_priv {
+ struct led_classdev cdev;
+ struct apu_param param;
+};
+#define cdev_to_priv(c) container_of(c, struct apu_led_priv, cdev)
+
+/* LED profile */
+struct apu_led_profile {
+ const char *name;
+ enum led_brightness brightness;
+ unsigned long offset; /* for devm_ioremap */
+};
+
+struct apu_led_pdata {
+ struct platform_device *pdev;
+ struct apu_led_priv *pled;
+ spinlock_t lock;
+};
+
+static struct apu_led_pdata *apu_led;
+
+static const struct apu_led_profile apu1_led_profile[] = {
+ { "apu:green:1", LED_ON, APU1_FCH_GPIO_BASE + 0 * APU1_IOSIZE },
+ { "apu:green:2", LED_OFF, APU1_FCH_GPIO_BASE + 1 * APU1_IOSIZE },
+ { "apu:green:3", LED_OFF, APU1_FCH_GPIO_BASE + 2 * APU1_IOSIZE },
+};
+
+static const struct dmi_system_id apu_led_dmi_table[] __initconst = {
+ /* PC Engines APU with factory bios "SageBios_PCEngines_APU-45" */
+ {
+ .ident = "apu",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "APU")
+ }
+ },
+ /* PC Engines APU with "Mainline" bios >= 4.6.8 */
+ {
+ .ident = "apu",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "apu1")
+ }
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(dmi, apu_led_dmi_table);
+
+static void apu1_led_brightness_set(struct led_classdev *led, enum led_brightness value)
+{
+ struct apu_led_priv *pled = cdev_to_priv(led);
+
+ spin_lock(&apu_led->lock);
+ iowrite8(value ? APU1_LEDON : APU1_LEDOFF, pled->param.addr);
+ spin_unlock(&apu_led->lock);
+}
+
+static int apu_led_config(struct device *dev, struct apu_led_pdata *apuld)
+{
+ int i;
+ int err;
+
+ apu_led->pled = devm_kcalloc(dev,
+ ARRAY_SIZE(apu1_led_profile), sizeof(struct apu_led_priv),
+ GFP_KERNEL);
+
+ if (!apu_led->pled)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(apu1_led_profile); i++) {
+ struct apu_led_priv *pled = &apu_led->pled[i];
+ struct led_classdev *led_cdev = &pled->cdev;
+
+ led_cdev->name = apu1_led_profile[i].name;
+ led_cdev->brightness = apu1_led_profile[i].brightness;
+ led_cdev->max_brightness = 1;
+ led_cdev->flags = LED_CORE_SUSPENDRESUME;
+ led_cdev->brightness_set = apu1_led_brightness_set;
+
+ pled->param.addr = devm_ioremap(dev,
+ apu1_led_profile[i].offset, APU1_IOSIZE);
+ if (!pled->param.addr) {
+ err = -ENOMEM;
+ goto error;
+ }
+
+ err = led_classdev_register(dev, led_cdev);
+ if (err)
+ goto error;
+
+ apu1_led_brightness_set(led_cdev, apu1_led_profile[i].brightness);
+ }
+
+ return 0;
+
+error:
+ while (i-- > 0)
+ led_classdev_unregister(&apu_led->pled[i].cdev);
+
+ return err;
+}
+
+static int __init apu_led_probe(struct platform_device *pdev)
+{
+ apu_led = devm_kzalloc(&pdev->dev, sizeof(*apu_led), GFP_KERNEL);
+
+ if (!apu_led)
+ return -ENOMEM;
+
+ apu_led->pdev = pdev;
+
+ spin_lock_init(&apu_led->lock);
+ return apu_led_config(&pdev->dev, apu_led);
+}
+
+static struct platform_driver apu_led_driver = {
+ .driver = {
+ .name = KBUILD_MODNAME,
+ },
+};
+
+static int __init apu_led_init(void)
+{
+ struct platform_device *pdev;
+ int err;
+
+ if (!(dmi_match(DMI_SYS_VENDOR, "PC Engines") &&
+ (dmi_match(DMI_PRODUCT_NAME, "APU") || dmi_match(DMI_PRODUCT_NAME, "apu1")))) {
+ pr_err("No PC Engines APUv1 board detected. For APUv2,3 support, enable CONFIG_PCENGINES_APU2\n");
+ return -ENODEV;
+ }
+
+ pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
+ if (IS_ERR(pdev)) {
+ pr_err("Device allocation failed\n");
+ return PTR_ERR(pdev);
+ }
+
+ err = platform_driver_probe(&apu_led_driver, apu_led_probe);
+ if (err) {
+ pr_err("Probe platform driver failed\n");
+ platform_device_unregister(pdev);
+ }
+
+ return err;
+}
+
+static void __exit apu_led_exit(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(apu1_led_profile); i++)
+ led_classdev_unregister(&apu_led->pled[i].cdev);
+
+ platform_device_unregister(apu_led->pdev);
+ platform_driver_unregister(&apu_led_driver);
+}
+
+module_init(apu_led_init);
+module_exit(apu_led_exit);
+
+MODULE_AUTHOR("Alan Mizrahi");
+MODULE_DESCRIPTION("PC Engines APU1 front LED driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:leds_apu");
diff --git a/drivers/leds/leds-ariel.c b/drivers/leds/leds-ariel.c
new file mode 100644
index 000000000..49e1bddaa
--- /dev/null
+++ b/drivers/leds/leds-ariel.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0-or-later
+/*
+ * Dell Wyse 3020 a.k.a. "Ariel" Embedded Controller LED Driver
+ *
+ * Copyright (C) 2020 Lubomir Rintel
+ */
+
+#include <linux/module.h>
+#include <linux/leds.h>
+#include <linux/regmap.h>
+#include <linux/of_platform.h>
+
+enum ec_index {
+ EC_BLUE_LED = 0x01,
+ EC_AMBER_LED = 0x02,
+ EC_GREEN_LED = 0x03,
+};
+
+enum {
+ EC_LED_OFF = 0x00,
+ EC_LED_STILL = 0x01,
+ EC_LED_FADE = 0x02,
+ EC_LED_BLINK = 0x03,
+};
+
+struct ariel_led {
+ struct regmap *ec_ram;
+ enum ec_index ec_index;
+ struct led_classdev led_cdev;
+};
+
+#define led_cdev_to_ariel_led(c) container_of(c, struct ariel_led, led_cdev)
+
+static enum led_brightness ariel_led_get(struct led_classdev *led_cdev)
+{
+ struct ariel_led *led = led_cdev_to_ariel_led(led_cdev);
+ unsigned int led_status = 0;
+
+ if (regmap_read(led->ec_ram, led->ec_index, &led_status))
+ return LED_OFF;
+
+ if (led_status == EC_LED_STILL)
+ return LED_FULL;
+ else
+ return LED_OFF;
+}
+
+static void ariel_led_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct ariel_led *led = led_cdev_to_ariel_led(led_cdev);
+
+ if (brightness == LED_OFF)
+ regmap_write(led->ec_ram, led->ec_index, EC_LED_OFF);
+ else
+ regmap_write(led->ec_ram, led->ec_index, EC_LED_STILL);
+}
+
+static int ariel_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ struct ariel_led *led = led_cdev_to_ariel_led(led_cdev);
+
+ if (*delay_on == 0 && *delay_off == 0)
+ return -EINVAL;
+
+ if (*delay_on == 0) {
+ regmap_write(led->ec_ram, led->ec_index, EC_LED_OFF);
+ } else if (*delay_off == 0) {
+ regmap_write(led->ec_ram, led->ec_index, EC_LED_STILL);
+ } else {
+ *delay_on = 500;
+ *delay_off = 500;
+ regmap_write(led->ec_ram, led->ec_index, EC_LED_BLINK);
+ }
+
+ return 0;
+}
+
+#define NLEDS 3
+
+static int ariel_led_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct ariel_led *leds;
+ struct regmap *ec_ram;
+ int ret;
+ int i;
+
+ ec_ram = dev_get_regmap(dev->parent, "ec_ram");
+ if (!ec_ram)
+ return -ENODEV;
+
+ leds = devm_kcalloc(dev, NLEDS, sizeof(*leds), GFP_KERNEL);
+ if (!leds)
+ return -ENOMEM;
+
+ leds[0].ec_index = EC_BLUE_LED;
+ leds[0].led_cdev.name = "blue:power";
+ leds[0].led_cdev.default_trigger = "default-on";
+
+ leds[1].ec_index = EC_AMBER_LED;
+ leds[1].led_cdev.name = "amber:status";
+
+ leds[2].ec_index = EC_GREEN_LED;
+ leds[2].led_cdev.name = "green:status";
+ leds[2].led_cdev.default_trigger = "default-on";
+
+ for (i = 0; i < NLEDS; i++) {
+ leds[i].ec_ram = ec_ram;
+ leds[i].led_cdev.brightness_get = ariel_led_get;
+ leds[i].led_cdev.brightness_set = ariel_led_set;
+ leds[i].led_cdev.blink_set = ariel_blink_set;
+
+ ret = devm_led_classdev_register(dev, &leds[i].led_cdev);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver ariel_led_driver = {
+ .probe = ariel_led_probe,
+ .driver = {
+ .name = "dell-wyse-ariel-led",
+ },
+};
+module_platform_driver(ariel_led_driver);
+
+MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
+MODULE_DESCRIPTION("Dell Wyse 3020 Status LEDs Driver");
+MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/leds/leds-asic3.c b/drivers/leds/leds-asic3.c
new file mode 100644
index 000000000..8cbc1b8ba
--- /dev/null
+++ b/drivers/leds/leds-asic3.c
@@ -0,0 +1,177 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2011 Paul Parsons <lost.distance@yahoo.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/asic3.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+
+/*
+ * The HTC ASIC3 LED GPIOs are inputs, not outputs.
+ * Hence we turn the LEDs on/off via the TimeBase register.
+ */
+
+/*
+ * When TimeBase is 4 the clock resolution is about 32Hz.
+ * This driver supports hardware blinking with an on+off
+ * period from 62ms (2 clocks) to 125s (4000 clocks).
+ */
+#define MS_TO_CLK(ms) DIV_ROUND_CLOSEST(((ms)*1024), 32000)
+#define CLK_TO_MS(clk) (((clk)*32000)/1024)
+#define MAX_CLK 4000 /* Fits into 12-bit Time registers */
+#define MAX_MS CLK_TO_MS(MAX_CLK)
+
+static const unsigned int led_n_base[ASIC3_NUM_LEDS] = {
+ [0] = ASIC3_LED_0_Base,
+ [1] = ASIC3_LED_1_Base,
+ [2] = ASIC3_LED_2_Base,
+};
+
+static void brightness_set(struct led_classdev *cdev,
+ enum led_brightness value)
+{
+ struct platform_device *pdev = to_platform_device(cdev->dev->parent);
+ const struct mfd_cell *cell = mfd_get_cell(pdev);
+ struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+ u32 timebase;
+ unsigned int base;
+
+ timebase = (value == LED_OFF) ? 0 : (LED_EN|0x4);
+
+ base = led_n_base[cell->id];
+ asic3_write_register(asic, (base + ASIC3_LED_PeriodTime), 32);
+ asic3_write_register(asic, (base + ASIC3_LED_DutyTime), 32);
+ asic3_write_register(asic, (base + ASIC3_LED_AutoStopCount), 0);
+ asic3_write_register(asic, (base + ASIC3_LED_TimeBase), timebase);
+}
+
+static int blink_set(struct led_classdev *cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct platform_device *pdev = to_platform_device(cdev->dev->parent);
+ const struct mfd_cell *cell = mfd_get_cell(pdev);
+ struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+ u32 on;
+ u32 off;
+ unsigned int base;
+
+ if (*delay_on > MAX_MS || *delay_off > MAX_MS)
+ return -EINVAL;
+
+ if (*delay_on == 0 && *delay_off == 0) {
+ /* If both are zero then a sensible default should be chosen */
+ on = MS_TO_CLK(500);
+ off = MS_TO_CLK(500);
+ } else {
+ on = MS_TO_CLK(*delay_on);
+ off = MS_TO_CLK(*delay_off);
+ if ((on + off) > MAX_CLK)
+ return -EINVAL;
+ }
+
+ base = led_n_base[cell->id];
+ asic3_write_register(asic, (base + ASIC3_LED_PeriodTime), (on + off));
+ asic3_write_register(asic, (base + ASIC3_LED_DutyTime), on);
+ asic3_write_register(asic, (base + ASIC3_LED_AutoStopCount), 0);
+ asic3_write_register(asic, (base + ASIC3_LED_TimeBase), (LED_EN|0x4));
+
+ *delay_on = CLK_TO_MS(on);
+ *delay_off = CLK_TO_MS(off);
+
+ return 0;
+}
+
+static int asic3_led_probe(struct platform_device *pdev)
+{
+ struct asic3_led *led = dev_get_platdata(&pdev->dev);
+ int ret;
+
+ ret = mfd_cell_enable(pdev);
+ if (ret < 0)
+ return ret;
+
+ led->cdev = devm_kzalloc(&pdev->dev, sizeof(struct led_classdev),
+ GFP_KERNEL);
+ if (!led->cdev) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ led->cdev->name = led->name;
+ led->cdev->flags = LED_CORE_SUSPENDRESUME;
+ led->cdev->brightness_set = brightness_set;
+ led->cdev->blink_set = blink_set;
+ led->cdev->default_trigger = led->default_trigger;
+
+ ret = led_classdev_register(&pdev->dev, led->cdev);
+ if (ret < 0)
+ goto out;
+
+ return 0;
+
+out:
+ (void) mfd_cell_disable(pdev);
+ return ret;
+}
+
+static int asic3_led_remove(struct platform_device *pdev)
+{
+ struct asic3_led *led = dev_get_platdata(&pdev->dev);
+
+ led_classdev_unregister(led->cdev);
+
+ return mfd_cell_disable(pdev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int asic3_led_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ const struct mfd_cell *cell = mfd_get_cell(pdev);
+ int ret;
+
+ ret = 0;
+ if (cell->suspend)
+ ret = (*cell->suspend)(pdev);
+
+ return ret;
+}
+
+static int asic3_led_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ const struct mfd_cell *cell = mfd_get_cell(pdev);
+ int ret;
+
+ ret = 0;
+ if (cell->resume)
+ ret = (*cell->resume)(pdev);
+
+ return ret;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(asic3_led_pm_ops, asic3_led_suspend, asic3_led_resume);
+
+static struct platform_driver asic3_led_driver = {
+ .probe = asic3_led_probe,
+ .remove = asic3_led_remove,
+ .driver = {
+ .name = "leds-asic3",
+ .pm = &asic3_led_pm_ops,
+ },
+};
+
+module_platform_driver(asic3_led_driver);
+
+MODULE_AUTHOR("Paul Parsons <lost.distance@yahoo.com>");
+MODULE_DESCRIPTION("HTC ASIC3 LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:leds-asic3");
diff --git a/drivers/leds/leds-aw2013.c b/drivers/leds/leds-aw2013.c
new file mode 100644
index 000000000..0b52fc909
--- /dev/null
+++ b/drivers/leds/leds-aw2013.c
@@ -0,0 +1,433 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Driver for Awinic AW2013 3-channel LED driver
+
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#define AW2013_MAX_LEDS 3
+
+/* Reset and ID register */
+#define AW2013_RSTR 0x00
+#define AW2013_RSTR_RESET 0x55
+#define AW2013_RSTR_CHIP_ID 0x33
+
+/* Global control register */
+#define AW2013_GCR 0x01
+#define AW2013_GCR_ENABLE BIT(0)
+
+/* LED channel enable register */
+#define AW2013_LCTR 0x30
+#define AW2013_LCTR_LE(x) BIT((x))
+
+/* LED channel control registers */
+#define AW2013_LCFG(x) (0x31 + (x))
+#define AW2013_LCFG_IMAX_MASK (BIT(0) | BIT(1)) // Should be 0-3
+#define AW2013_LCFG_MD BIT(4)
+#define AW2013_LCFG_FI BIT(5)
+#define AW2013_LCFG_FO BIT(6)
+
+/* LED channel PWM registers */
+#define AW2013_REG_PWM(x) (0x34 + (x))
+
+/* LED channel timing registers */
+#define AW2013_LEDT0(x) (0x37 + (x) * 3)
+#define AW2013_LEDT0_T1(x) ((x) << 4) // Should be 0-7
+#define AW2013_LEDT0_T2(x) (x) // Should be 0-5
+
+#define AW2013_LEDT1(x) (0x38 + (x) * 3)
+#define AW2013_LEDT1_T3(x) ((x) << 4) // Should be 0-7
+#define AW2013_LEDT1_T4(x) (x) // Should be 0-7
+
+#define AW2013_LEDT2(x) (0x39 + (x) * 3)
+#define AW2013_LEDT2_T0(x) ((x) << 4) // Should be 0-8
+#define AW2013_LEDT2_REPEAT(x) (x) // Should be 0-15
+
+#define AW2013_REG_MAX 0x77
+
+#define AW2013_TIME_STEP 130 /* ms */
+
+struct aw2013;
+
+struct aw2013_led {
+ struct aw2013 *chip;
+ struct led_classdev cdev;
+ u32 num;
+ unsigned int imax;
+};
+
+struct aw2013 {
+ struct mutex mutex; /* held when writing to registers */
+ struct regulator *vcc_regulator;
+ struct i2c_client *client;
+ struct aw2013_led leds[AW2013_MAX_LEDS];
+ struct regmap *regmap;
+ int num_leds;
+ bool enabled;
+};
+
+static int aw2013_chip_init(struct aw2013 *chip)
+{
+ int i, ret;
+
+ ret = regmap_write(chip->regmap, AW2013_GCR, AW2013_GCR_ENABLE);
+ if (ret) {
+ dev_err(&chip->client->dev, "Failed to enable the chip: %d\n",
+ ret);
+ return ret;
+ }
+
+ for (i = 0; i < chip->num_leds; i++) {
+ ret = regmap_update_bits(chip->regmap,
+ AW2013_LCFG(chip->leds[i].num),
+ AW2013_LCFG_IMAX_MASK,
+ chip->leds[i].imax);
+ if (ret) {
+ dev_err(&chip->client->dev,
+ "Failed to set maximum current for led %d: %d\n",
+ chip->leds[i].num, ret);
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+static void aw2013_chip_disable(struct aw2013 *chip)
+{
+ int ret;
+
+ if (!chip->enabled)
+ return;
+
+ regmap_write(chip->regmap, AW2013_GCR, 0);
+
+ ret = regulator_disable(chip->vcc_regulator);
+ if (ret) {
+ dev_err(&chip->client->dev,
+ "Failed to disable regulator: %d\n", ret);
+ return;
+ }
+
+ chip->enabled = false;
+}
+
+static int aw2013_chip_enable(struct aw2013 *chip)
+{
+ int ret;
+
+ if (chip->enabled)
+ return 0;
+
+ ret = regulator_enable(chip->vcc_regulator);
+ if (ret) {
+ dev_err(&chip->client->dev,
+ "Failed to enable regulator: %d\n", ret);
+ return ret;
+ }
+ chip->enabled = true;
+
+ ret = aw2013_chip_init(chip);
+ if (ret)
+ aw2013_chip_disable(chip);
+
+ return ret;
+}
+
+static bool aw2013_chip_in_use(struct aw2013 *chip)
+{
+ int i;
+
+ for (i = 0; i < chip->num_leds; i++)
+ if (chip->leds[i].cdev.brightness)
+ return true;
+
+ return false;
+}
+
+static int aw2013_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct aw2013_led *led = container_of(cdev, struct aw2013_led, cdev);
+ int ret, num;
+
+ mutex_lock(&led->chip->mutex);
+
+ if (aw2013_chip_in_use(led->chip)) {
+ ret = aw2013_chip_enable(led->chip);
+ if (ret)
+ goto error;
+ }
+
+ num = led->num;
+
+ ret = regmap_write(led->chip->regmap, AW2013_REG_PWM(num), brightness);
+ if (ret)
+ goto error;
+
+ if (brightness) {
+ ret = regmap_update_bits(led->chip->regmap, AW2013_LCTR,
+ AW2013_LCTR_LE(num), 0xFF);
+ } else {
+ ret = regmap_update_bits(led->chip->regmap, AW2013_LCTR,
+ AW2013_LCTR_LE(num), 0);
+ if (ret)
+ goto error;
+ ret = regmap_update_bits(led->chip->regmap, AW2013_LCFG(num),
+ AW2013_LCFG_MD, 0);
+ }
+ if (ret)
+ goto error;
+
+ if (!aw2013_chip_in_use(led->chip))
+ aw2013_chip_disable(led->chip);
+
+error:
+ mutex_unlock(&led->chip->mutex);
+
+ return ret;
+}
+
+static int aw2013_blink_set(struct led_classdev *cdev,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ struct aw2013_led *led = container_of(cdev, struct aw2013_led, cdev);
+ int ret, num = led->num;
+ unsigned long off = 0, on = 0;
+
+ /* If no blink specified, default to 1 Hz. */
+ if (!*delay_off && !*delay_on) {
+ *delay_off = 500;
+ *delay_on = 500;
+ }
+
+ if (!led->cdev.brightness) {
+ led->cdev.brightness = LED_FULL;
+ ret = aw2013_brightness_set(&led->cdev, led->cdev.brightness);
+ if (ret)
+ return ret;
+ }
+
+ /* Never on - just set to off */
+ if (!*delay_on) {
+ led->cdev.brightness = LED_OFF;
+ return aw2013_brightness_set(&led->cdev, LED_OFF);
+ }
+
+ mutex_lock(&led->chip->mutex);
+
+ /* Never off - brightness is already set, disable blinking */
+ if (!*delay_off) {
+ ret = regmap_update_bits(led->chip->regmap, AW2013_LCFG(num),
+ AW2013_LCFG_MD, 0);
+ goto out;
+ }
+
+ /* Convert into values the HW will understand. */
+ off = min(5, ilog2((*delay_off - 1) / AW2013_TIME_STEP) + 1);
+ on = min(7, ilog2((*delay_on - 1) / AW2013_TIME_STEP) + 1);
+
+ *delay_off = BIT(off) * AW2013_TIME_STEP;
+ *delay_on = BIT(on) * AW2013_TIME_STEP;
+
+ /* Set timings */
+ ret = regmap_write(led->chip->regmap,
+ AW2013_LEDT0(num), AW2013_LEDT0_T2(on));
+ if (ret)
+ goto out;
+ ret = regmap_write(led->chip->regmap,
+ AW2013_LEDT1(num), AW2013_LEDT1_T4(off));
+ if (ret)
+ goto out;
+
+ /* Finally, enable the LED */
+ ret = regmap_update_bits(led->chip->regmap, AW2013_LCFG(num),
+ AW2013_LCFG_MD, 0xFF);
+ if (ret)
+ goto out;
+
+ ret = regmap_update_bits(led->chip->regmap, AW2013_LCTR,
+ AW2013_LCTR_LE(num), 0xFF);
+
+out:
+ mutex_unlock(&led->chip->mutex);
+
+ return ret;
+}
+
+static int aw2013_probe_dt(struct aw2013 *chip)
+{
+ struct device_node *np = dev_of_node(&chip->client->dev), *child;
+ int count, ret = 0, i = 0;
+ struct aw2013_led *led;
+
+ count = of_get_available_child_count(np);
+ if (!count || count > AW2013_MAX_LEDS)
+ return -EINVAL;
+
+ regmap_write(chip->regmap, AW2013_RSTR, AW2013_RSTR_RESET);
+
+ for_each_available_child_of_node(np, child) {
+ struct led_init_data init_data = {};
+ u32 source;
+ u32 imax;
+
+ ret = of_property_read_u32(child, "reg", &source);
+ if (ret != 0 || source >= AW2013_MAX_LEDS) {
+ dev_err(&chip->client->dev,
+ "Couldn't read LED address: %d\n", ret);
+ count--;
+ continue;
+ }
+
+ led = &chip->leds[i];
+ led->num = source;
+ led->chip = chip;
+ init_data.fwnode = of_fwnode_handle(child);
+
+ if (!of_property_read_u32(child, "led-max-microamp", &imax)) {
+ led->imax = min_t(u32, imax / 5000, 3);
+ } else {
+ led->imax = 1; // 5mA
+ dev_info(&chip->client->dev,
+ "DT property led-max-microamp is missing\n");
+ }
+
+ led->cdev.brightness_set_blocking = aw2013_brightness_set;
+ led->cdev.blink_set = aw2013_blink_set;
+
+ ret = devm_led_classdev_register_ext(&chip->client->dev,
+ &led->cdev, &init_data);
+ if (ret < 0) {
+ of_node_put(child);
+ return ret;
+ }
+
+ i++;
+ }
+
+ if (!count)
+ return -EINVAL;
+
+ chip->num_leds = i;
+
+ return 0;
+}
+
+static const struct regmap_config aw2013_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = AW2013_REG_MAX,
+};
+
+static int aw2013_probe(struct i2c_client *client)
+{
+ struct aw2013 *chip;
+ int ret;
+ unsigned int chipid;
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ mutex_init(&chip->mutex);
+ mutex_lock(&chip->mutex);
+
+ chip->client = client;
+ i2c_set_clientdata(client, chip);
+
+ chip->regmap = devm_regmap_init_i2c(client, &aw2013_regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ ret = PTR_ERR(chip->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ goto error;
+ }
+
+ chip->vcc_regulator = devm_regulator_get(&client->dev, "vcc");
+ ret = PTR_ERR_OR_ZERO(chip->vcc_regulator);
+ if (ret) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(&client->dev,
+ "Failed to request regulator: %d\n", ret);
+ goto error;
+ }
+
+ ret = regulator_enable(chip->vcc_regulator);
+ if (ret) {
+ dev_err(&client->dev,
+ "Failed to enable regulator: %d\n", ret);
+ goto error;
+ }
+
+ ret = regmap_read(chip->regmap, AW2013_RSTR, &chipid);
+ if (ret) {
+ dev_err(&client->dev, "Failed to read chip ID: %d\n",
+ ret);
+ goto error_reg;
+ }
+
+ if (chipid != AW2013_RSTR_CHIP_ID) {
+ dev_err(&client->dev, "Chip reported wrong ID: %x\n",
+ chipid);
+ ret = -ENODEV;
+ goto error_reg;
+ }
+
+ ret = aw2013_probe_dt(chip);
+ if (ret < 0)
+ goto error_reg;
+
+ ret = regulator_disable(chip->vcc_regulator);
+ if (ret) {
+ dev_err(&client->dev,
+ "Failed to disable regulator: %d\n", ret);
+ goto error;
+ }
+
+ mutex_unlock(&chip->mutex);
+
+ return 0;
+
+error_reg:
+ regulator_disable(chip->vcc_regulator);
+
+error:
+ mutex_destroy(&chip->mutex);
+ return ret;
+}
+
+static void aw2013_remove(struct i2c_client *client)
+{
+ struct aw2013 *chip = i2c_get_clientdata(client);
+
+ aw2013_chip_disable(chip);
+
+ mutex_destroy(&chip->mutex);
+}
+
+static const struct of_device_id aw2013_match_table[] = {
+ { .compatible = "awinic,aw2013", },
+ { /* sentinel */ },
+};
+
+MODULE_DEVICE_TABLE(of, aw2013_match_table);
+
+static struct i2c_driver aw2013_driver = {
+ .driver = {
+ .name = "leds-aw2013",
+ .of_match_table = of_match_ptr(aw2013_match_table),
+ },
+ .probe_new = aw2013_probe,
+ .remove = aw2013_remove,
+};
+
+module_i2c_driver(aw2013_driver);
+
+MODULE_AUTHOR("Nikita Travkin <nikitos.tr@gmail.com>");
+MODULE_DESCRIPTION("AW2013 LED driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-bcm6328.c b/drivers/leds/leds-bcm6328.c
new file mode 100644
index 000000000..2d4d87957
--- /dev/null
+++ b/drivers/leds/leds-bcm6328.c
@@ -0,0 +1,487 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for BCM6328 memory-mapped LEDs, based on leds-syscon.c
+ *
+ * Copyright 2015 Álvaro Fernández Rojas <noltari@gmail.com>
+ * Copyright 2015 Jonas Gorski <jogo@openwrt.org>
+ */
+#include <linux/io.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+
+#define BCM6328_REG_INIT 0x00
+#define BCM6328_REG_MODE_HI 0x04
+#define BCM6328_REG_MODE_LO 0x08
+#define BCM6328_REG_HWDIS 0x0c
+#define BCM6328_REG_STROBE 0x10
+#define BCM6328_REG_LNKACTSEL_HI 0x14
+#define BCM6328_REG_LNKACTSEL_LO 0x18
+#define BCM6328_REG_RBACK 0x1c
+#define BCM6328_REG_SERMUX 0x20
+
+#define BCM6328_LED_MAX_COUNT 24
+#define BCM6328_LED_DEF_DELAY 500
+
+#define BCM6328_LED_BLINK_DELAYS 2
+#define BCM6328_LED_BLINK_MS 20
+
+#define BCM6328_LED_BLINK_MASK 0x3f
+#define BCM6328_LED_BLINK1_SHIFT 0
+#define BCM6328_LED_BLINK1_MASK (BCM6328_LED_BLINK_MASK << \
+ BCM6328_LED_BLINK1_SHIFT)
+#define BCM6328_LED_BLINK2_SHIFT 6
+#define BCM6328_LED_BLINK2_MASK (BCM6328_LED_BLINK_MASK << \
+ BCM6328_LED_BLINK2_SHIFT)
+#define BCM6328_SERIAL_LED_EN BIT(12)
+#define BCM6328_SERIAL_LED_MUX BIT(13)
+#define BCM6328_SERIAL_LED_CLK_NPOL BIT(14)
+#define BCM6328_SERIAL_LED_DATA_PPOL BIT(15)
+#define BCM6328_SERIAL_LED_SHIFT_DIR BIT(16)
+#define BCM6328_LED_SHIFT_TEST BIT(30)
+#define BCM6328_LED_TEST BIT(31)
+#define BCM6328_INIT_MASK (BCM6328_SERIAL_LED_EN | \
+ BCM6328_SERIAL_LED_MUX | \
+ BCM6328_SERIAL_LED_CLK_NPOL | \
+ BCM6328_SERIAL_LED_DATA_PPOL | \
+ BCM6328_SERIAL_LED_SHIFT_DIR)
+
+#define BCM6328_LED_MODE_MASK 3
+#define BCM6328_LED_MODE_ON 0
+#define BCM6328_LED_MODE_BLINK1 1
+#define BCM6328_LED_MODE_BLINK2 2
+#define BCM6328_LED_MODE_OFF 3
+#define BCM6328_LED_SHIFT(X) ((X) << 1)
+
+/**
+ * struct bcm6328_led - state container for bcm6328 based LEDs
+ * @cdev: LED class device for this LED
+ * @mem: memory resource
+ * @lock: memory lock
+ * @pin: LED pin number
+ * @blink_leds: blinking LEDs
+ * @blink_delay: blinking delay
+ * @active_low: LED is active low
+ */
+struct bcm6328_led {
+ struct led_classdev cdev;
+ void __iomem *mem;
+ spinlock_t *lock;
+ unsigned long pin;
+ unsigned long *blink_leds;
+ unsigned long *blink_delay;
+ bool active_low;
+};
+
+static void bcm6328_led_write(void __iomem *reg, unsigned long data)
+{
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ iowrite32be(data, reg);
+#else
+ writel(data, reg);
+#endif
+}
+
+static unsigned long bcm6328_led_read(void __iomem *reg)
+{
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ return ioread32be(reg);
+#else
+ return readl(reg);
+#endif
+}
+
+/*
+ * LEDMode 64 bits / 24 LEDs
+ * bits [31:0] -> LEDs 8-23
+ * bits [47:32] -> LEDs 0-7
+ * bits [63:48] -> unused
+ */
+static unsigned long bcm6328_pin2shift(unsigned long pin)
+{
+ if (pin < 8)
+ return pin + 16; /* LEDs 0-7 (bits 47:32) */
+ else
+ return pin - 8; /* LEDs 8-23 (bits 31:0) */
+}
+
+static void bcm6328_led_mode(struct bcm6328_led *led, unsigned long value)
+{
+ void __iomem *mode;
+ unsigned long val, shift;
+
+ shift = bcm6328_pin2shift(led->pin);
+ if (shift / 16)
+ mode = led->mem + BCM6328_REG_MODE_HI;
+ else
+ mode = led->mem + BCM6328_REG_MODE_LO;
+
+ val = bcm6328_led_read(mode);
+ val &= ~(BCM6328_LED_MODE_MASK << BCM6328_LED_SHIFT(shift % 16));
+ val |= (value << BCM6328_LED_SHIFT(shift % 16));
+ bcm6328_led_write(mode, val);
+}
+
+static void bcm6328_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct bcm6328_led *led =
+ container_of(led_cdev, struct bcm6328_led, cdev);
+ unsigned long flags;
+
+ spin_lock_irqsave(led->lock, flags);
+
+ /* Remove LED from cached HW blinking intervals */
+ led->blink_leds[0] &= ~BIT(led->pin);
+ led->blink_leds[1] &= ~BIT(led->pin);
+
+ /* Set LED on/off */
+ if ((led->active_low && value == LED_OFF) ||
+ (!led->active_low && value != LED_OFF))
+ bcm6328_led_mode(led, BCM6328_LED_MODE_ON);
+ else
+ bcm6328_led_mode(led, BCM6328_LED_MODE_OFF);
+
+ spin_unlock_irqrestore(led->lock, flags);
+}
+
+static unsigned long bcm6328_blink_delay(unsigned long delay)
+{
+ unsigned long bcm6328_delay;
+
+ bcm6328_delay = delay + BCM6328_LED_BLINK_MS / 2;
+ bcm6328_delay = bcm6328_delay / BCM6328_LED_BLINK_MS;
+ if (bcm6328_delay == 0)
+ bcm6328_delay = 1;
+
+ return bcm6328_delay;
+}
+
+static int bcm6328_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ struct bcm6328_led *led =
+ container_of(led_cdev, struct bcm6328_led, cdev);
+ unsigned long delay, flags;
+ int rc;
+
+ if (!*delay_on)
+ *delay_on = BCM6328_LED_DEF_DELAY;
+ if (!*delay_off)
+ *delay_off = BCM6328_LED_DEF_DELAY;
+
+ delay = bcm6328_blink_delay(*delay_on);
+ if (delay != bcm6328_blink_delay(*delay_off)) {
+ dev_dbg(led_cdev->dev,
+ "fallback to soft blinking (delay_on != delay_off)\n");
+ return -EINVAL;
+ }
+
+ if (delay > BCM6328_LED_BLINK_MASK) {
+ dev_dbg(led_cdev->dev,
+ "fallback to soft blinking (delay > %ums)\n",
+ BCM6328_LED_BLINK_MASK * BCM6328_LED_BLINK_MS);
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(led->lock, flags);
+ /*
+ * Check if any of the two configurable HW blinking intervals is
+ * available:
+ * 1. No LEDs assigned to the HW blinking interval.
+ * 2. Only this LED is assigned to the HW blinking interval.
+ * 3. LEDs with the same delay assigned.
+ */
+ if (led->blink_leds[0] == 0 ||
+ led->blink_leds[0] == BIT(led->pin) ||
+ led->blink_delay[0] == delay) {
+ unsigned long val;
+
+ /* Add LED to the first HW blinking interval cache */
+ led->blink_leds[0] |= BIT(led->pin);
+
+ /* Remove LED from the second HW blinking interval cache */
+ led->blink_leds[1] &= ~BIT(led->pin);
+
+ /* Cache first HW blinking interval delay */
+ led->blink_delay[0] = delay;
+
+ /* Update the delay for the first HW blinking interval */
+ val = bcm6328_led_read(led->mem + BCM6328_REG_INIT);
+ val &= ~BCM6328_LED_BLINK1_MASK;
+ val |= (delay << BCM6328_LED_BLINK1_SHIFT);
+ bcm6328_led_write(led->mem + BCM6328_REG_INIT, val);
+
+ /* Set the LED to first HW blinking interval */
+ bcm6328_led_mode(led, BCM6328_LED_MODE_BLINK1);
+
+ rc = 0;
+ } else if (led->blink_leds[1] == 0 ||
+ led->blink_leds[1] == BIT(led->pin) ||
+ led->blink_delay[1] == delay) {
+ unsigned long val;
+
+ /* Remove LED from the first HW blinking interval */
+ led->blink_leds[0] &= ~BIT(led->pin);
+
+ /* Add LED to the second HW blinking interval */
+ led->blink_leds[1] |= BIT(led->pin);
+
+ /* Cache second HW blinking interval delay */
+ led->blink_delay[1] = delay;
+
+ /* Update the delay for the second HW blinking interval */
+ val = bcm6328_led_read(led->mem + BCM6328_REG_INIT);
+ val &= ~BCM6328_LED_BLINK2_MASK;
+ val |= (delay << BCM6328_LED_BLINK2_SHIFT);
+ bcm6328_led_write(led->mem + BCM6328_REG_INIT, val);
+
+ /* Set the LED to second HW blinking interval */
+ bcm6328_led_mode(led, BCM6328_LED_MODE_BLINK2);
+
+ rc = 0;
+ } else {
+ dev_dbg(led_cdev->dev,
+ "fallback to soft blinking (delay already set)\n");
+ rc = -EINVAL;
+ }
+ spin_unlock_irqrestore(led->lock, flags);
+
+ return rc;
+}
+
+static int bcm6328_hwled(struct device *dev, struct device_node *nc, u32 reg,
+ void __iomem *mem, spinlock_t *lock)
+{
+ int i, cnt;
+ unsigned long flags, val;
+
+ spin_lock_irqsave(lock, flags);
+ val = bcm6328_led_read(mem + BCM6328_REG_HWDIS);
+ val &= ~BIT(reg);
+ bcm6328_led_write(mem + BCM6328_REG_HWDIS, val);
+ spin_unlock_irqrestore(lock, flags);
+
+ /* Only LEDs 0-7 can be activity/link controlled */
+ if (reg >= 8)
+ return 0;
+
+ cnt = of_property_count_elems_of_size(nc, "brcm,link-signal-sources",
+ sizeof(u32));
+ for (i = 0; i < cnt; i++) {
+ u32 sel;
+ void __iomem *addr;
+
+ if (reg < 4)
+ addr = mem + BCM6328_REG_LNKACTSEL_LO;
+ else
+ addr = mem + BCM6328_REG_LNKACTSEL_HI;
+
+ of_property_read_u32_index(nc, "brcm,link-signal-sources", i,
+ &sel);
+
+ if (reg / 4 != sel / 4) {
+ dev_warn(dev, "invalid link signal source\n");
+ continue;
+ }
+
+ spin_lock_irqsave(lock, flags);
+ val = bcm6328_led_read(addr);
+ val |= (BIT(reg % 4) << (((sel % 4) * 4) + 16));
+ bcm6328_led_write(addr, val);
+ spin_unlock_irqrestore(lock, flags);
+ }
+
+ cnt = of_property_count_elems_of_size(nc,
+ "brcm,activity-signal-sources",
+ sizeof(u32));
+ for (i = 0; i < cnt; i++) {
+ u32 sel;
+ void __iomem *addr;
+
+ if (reg < 4)
+ addr = mem + BCM6328_REG_LNKACTSEL_LO;
+ else
+ addr = mem + BCM6328_REG_LNKACTSEL_HI;
+
+ of_property_read_u32_index(nc, "brcm,activity-signal-sources",
+ i, &sel);
+
+ if (reg / 4 != sel / 4) {
+ dev_warn(dev, "invalid activity signal source\n");
+ continue;
+ }
+
+ spin_lock_irqsave(lock, flags);
+ val = bcm6328_led_read(addr);
+ val |= (BIT(reg % 4) << ((sel % 4) * 4));
+ bcm6328_led_write(addr, val);
+ spin_unlock_irqrestore(lock, flags);
+ }
+
+ return 0;
+}
+
+static int bcm6328_led(struct device *dev, struct device_node *nc, u32 reg,
+ void __iomem *mem, spinlock_t *lock,
+ unsigned long *blink_leds, unsigned long *blink_delay)
+{
+ struct led_init_data init_data = {};
+ struct bcm6328_led *led;
+ const char *state;
+ int rc;
+
+ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->pin = reg;
+ led->mem = mem;
+ led->lock = lock;
+ led->blink_leds = blink_leds;
+ led->blink_delay = blink_delay;
+
+ if (of_property_read_bool(nc, "active-low"))
+ led->active_low = true;
+
+ if (!of_property_read_string(nc, "default-state", &state)) {
+ if (!strcmp(state, "on")) {
+ led->cdev.brightness = LED_FULL;
+ } else if (!strcmp(state, "keep")) {
+ void __iomem *mode;
+ unsigned long val, shift;
+
+ shift = bcm6328_pin2shift(led->pin);
+ if (shift / 16)
+ mode = mem + BCM6328_REG_MODE_HI;
+ else
+ mode = mem + BCM6328_REG_MODE_LO;
+
+ val = bcm6328_led_read(mode) >>
+ BCM6328_LED_SHIFT(shift % 16);
+ val &= BCM6328_LED_MODE_MASK;
+ if ((led->active_low && val == BCM6328_LED_MODE_OFF) ||
+ (!led->active_low && val == BCM6328_LED_MODE_ON))
+ led->cdev.brightness = LED_FULL;
+ else
+ led->cdev.brightness = LED_OFF;
+ } else {
+ led->cdev.brightness = LED_OFF;
+ }
+ } else {
+ led->cdev.brightness = LED_OFF;
+ }
+
+ bcm6328_led_set(&led->cdev, led->cdev.brightness);
+
+ led->cdev.brightness_set = bcm6328_led_set;
+ led->cdev.blink_set = bcm6328_blink_set;
+ init_data.fwnode = of_fwnode_handle(nc);
+
+ rc = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
+ if (rc < 0)
+ return rc;
+
+ dev_dbg(dev, "registered LED %s\n", led->cdev.name);
+
+ return 0;
+}
+
+static int bcm6328_leds_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev_of_node(&pdev->dev);
+ struct device_node *child;
+ void __iomem *mem;
+ spinlock_t *lock; /* memory lock */
+ unsigned long val, *blink_leds, *blink_delay;
+
+ mem = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(mem))
+ return PTR_ERR(mem);
+
+ lock = devm_kzalloc(dev, sizeof(*lock), GFP_KERNEL);
+ if (!lock)
+ return -ENOMEM;
+
+ blink_leds = devm_kcalloc(dev, BCM6328_LED_BLINK_DELAYS,
+ sizeof(*blink_leds), GFP_KERNEL);
+ if (!blink_leds)
+ return -ENOMEM;
+
+ blink_delay = devm_kcalloc(dev, BCM6328_LED_BLINK_DELAYS,
+ sizeof(*blink_delay), GFP_KERNEL);
+ if (!blink_delay)
+ return -ENOMEM;
+
+ spin_lock_init(lock);
+
+ bcm6328_led_write(mem + BCM6328_REG_HWDIS, ~0);
+ bcm6328_led_write(mem + BCM6328_REG_LNKACTSEL_HI, 0);
+ bcm6328_led_write(mem + BCM6328_REG_LNKACTSEL_LO, 0);
+
+ val = bcm6328_led_read(mem + BCM6328_REG_INIT);
+ val &= ~(BCM6328_INIT_MASK);
+ if (of_property_read_bool(np, "brcm,serial-leds"))
+ val |= BCM6328_SERIAL_LED_EN;
+ if (of_property_read_bool(np, "brcm,serial-mux"))
+ val |= BCM6328_SERIAL_LED_MUX;
+ if (of_property_read_bool(np, "brcm,serial-clk-low"))
+ val |= BCM6328_SERIAL_LED_CLK_NPOL;
+ if (!of_property_read_bool(np, "brcm,serial-dat-low"))
+ val |= BCM6328_SERIAL_LED_DATA_PPOL;
+ if (!of_property_read_bool(np, "brcm,serial-shift-inv"))
+ val |= BCM6328_SERIAL_LED_SHIFT_DIR;
+ bcm6328_led_write(mem + BCM6328_REG_INIT, val);
+
+ for_each_available_child_of_node(np, child) {
+ int rc;
+ u32 reg;
+
+ if (of_property_read_u32(child, "reg", &reg))
+ continue;
+
+ if (reg >= BCM6328_LED_MAX_COUNT) {
+ dev_err(dev, "invalid LED (%u >= %d)\n", reg,
+ BCM6328_LED_MAX_COUNT);
+ continue;
+ }
+
+ if (of_property_read_bool(child, "brcm,hardware-controlled"))
+ rc = bcm6328_hwled(dev, child, reg, mem, lock);
+ else
+ rc = bcm6328_led(dev, child, reg, mem, lock,
+ blink_leds, blink_delay);
+
+ if (rc < 0) {
+ of_node_put(child);
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+static const struct of_device_id bcm6328_leds_of_match[] = {
+ { .compatible = "brcm,bcm6328-leds", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, bcm6328_leds_of_match);
+
+static struct platform_driver bcm6328_leds_driver = {
+ .probe = bcm6328_leds_probe,
+ .driver = {
+ .name = "leds-bcm6328",
+ .of_match_table = bcm6328_leds_of_match,
+ },
+};
+
+module_platform_driver(bcm6328_leds_driver);
+
+MODULE_AUTHOR("Álvaro Fernández Rojas <noltari@gmail.com>");
+MODULE_AUTHOR("Jonas Gorski <jogo@openwrt.org>");
+MODULE_DESCRIPTION("LED driver for BCM6328 controllers");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:leds-bcm6328");
diff --git a/drivers/leds/leds-bcm6358.c b/drivers/leds/leds-bcm6358.c
new file mode 100644
index 000000000..9d2e487fa
--- /dev/null
+++ b/drivers/leds/leds-bcm6358.c
@@ -0,0 +1,229 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for BCM6358 memory-mapped LEDs, based on leds-syscon.c
+ *
+ * Copyright 2015 Álvaro Fernández Rojas <noltari@gmail.com>
+ */
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+
+#define BCM6358_REG_MODE 0x0
+#define BCM6358_REG_CTRL 0x4
+
+#define BCM6358_SLED_CLKDIV_MASK 3
+#define BCM6358_SLED_CLKDIV_1 0
+#define BCM6358_SLED_CLKDIV_2 1
+#define BCM6358_SLED_CLKDIV_4 2
+#define BCM6358_SLED_CLKDIV_8 3
+
+#define BCM6358_SLED_POLARITY BIT(2)
+#define BCM6358_SLED_BUSY BIT(3)
+
+#define BCM6358_SLED_MAX_COUNT 32
+#define BCM6358_SLED_WAIT 100
+
+/**
+ * struct bcm6358_led - state container for bcm6358 based LEDs
+ * @cdev: LED class device for this LED
+ * @mem: memory resource
+ * @lock: memory lock
+ * @pin: LED pin number
+ * @active_low: LED is active low
+ */
+struct bcm6358_led {
+ struct led_classdev cdev;
+ void __iomem *mem;
+ spinlock_t *lock;
+ unsigned long pin;
+ bool active_low;
+};
+
+static void bcm6358_led_write(void __iomem *reg, unsigned long data)
+{
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ iowrite32be(data, reg);
+#else
+ writel(data, reg);
+#endif
+}
+
+static unsigned long bcm6358_led_read(void __iomem *reg)
+{
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ return ioread32be(reg);
+#else
+ return readl(reg);
+#endif
+}
+
+static unsigned long bcm6358_led_busy(void __iomem *mem)
+{
+ unsigned long val;
+
+ while ((val = bcm6358_led_read(mem + BCM6358_REG_CTRL)) &
+ BCM6358_SLED_BUSY)
+ udelay(BCM6358_SLED_WAIT);
+
+ return val;
+}
+
+static void bcm6358_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct bcm6358_led *led =
+ container_of(led_cdev, struct bcm6358_led, cdev);
+ unsigned long flags, val;
+
+ spin_lock_irqsave(led->lock, flags);
+ bcm6358_led_busy(led->mem);
+ val = bcm6358_led_read(led->mem + BCM6358_REG_MODE);
+ if ((led->active_low && value == LED_OFF) ||
+ (!led->active_low && value != LED_OFF))
+ val |= BIT(led->pin);
+ else
+ val &= ~(BIT(led->pin));
+ bcm6358_led_write(led->mem + BCM6358_REG_MODE, val);
+ spin_unlock_irqrestore(led->lock, flags);
+}
+
+static int bcm6358_led(struct device *dev, struct device_node *nc, u32 reg,
+ void __iomem *mem, spinlock_t *lock)
+{
+ struct led_init_data init_data = {};
+ struct bcm6358_led *led;
+ const char *state;
+ int rc;
+
+ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->pin = reg;
+ led->mem = mem;
+ led->lock = lock;
+
+ if (of_property_read_bool(nc, "active-low"))
+ led->active_low = true;
+
+ if (!of_property_read_string(nc, "default-state", &state)) {
+ if (!strcmp(state, "on")) {
+ led->cdev.brightness = LED_FULL;
+ } else if (!strcmp(state, "keep")) {
+ unsigned long val;
+ val = bcm6358_led_read(led->mem + BCM6358_REG_MODE);
+ val &= BIT(led->pin);
+ if ((led->active_low && !val) ||
+ (!led->active_low && val))
+ led->cdev.brightness = LED_FULL;
+ else
+ led->cdev.brightness = LED_OFF;
+ } else {
+ led->cdev.brightness = LED_OFF;
+ }
+ } else {
+ led->cdev.brightness = LED_OFF;
+ }
+
+ bcm6358_led_set(&led->cdev, led->cdev.brightness);
+
+ led->cdev.brightness_set = bcm6358_led_set;
+ init_data.fwnode = of_fwnode_handle(nc);
+
+ rc = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
+ if (rc < 0)
+ return rc;
+
+ dev_dbg(dev, "registered LED %s\n", led->cdev.name);
+
+ return 0;
+}
+
+static int bcm6358_leds_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev_of_node(&pdev->dev);
+ struct device_node *child;
+ void __iomem *mem;
+ spinlock_t *lock; /* memory lock */
+ unsigned long val;
+ u32 clk_div;
+
+ mem = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(mem))
+ return PTR_ERR(mem);
+
+ lock = devm_kzalloc(dev, sizeof(*lock), GFP_KERNEL);
+ if (!lock)
+ return -ENOMEM;
+
+ spin_lock_init(lock);
+
+ val = bcm6358_led_busy(mem);
+ val &= ~(BCM6358_SLED_POLARITY | BCM6358_SLED_CLKDIV_MASK);
+ if (of_property_read_bool(np, "brcm,clk-dat-low"))
+ val |= BCM6358_SLED_POLARITY;
+ of_property_read_u32(np, "brcm,clk-div", &clk_div);
+ switch (clk_div) {
+ case 8:
+ val |= BCM6358_SLED_CLKDIV_8;
+ break;
+ case 4:
+ val |= BCM6358_SLED_CLKDIV_4;
+ break;
+ case 2:
+ val |= BCM6358_SLED_CLKDIV_2;
+ break;
+ default:
+ val |= BCM6358_SLED_CLKDIV_1;
+ break;
+ }
+ bcm6358_led_write(mem + BCM6358_REG_CTRL, val);
+
+ for_each_available_child_of_node(np, child) {
+ int rc;
+ u32 reg;
+
+ if (of_property_read_u32(child, "reg", &reg))
+ continue;
+
+ if (reg >= BCM6358_SLED_MAX_COUNT) {
+ dev_err(dev, "invalid LED (%u >= %d)\n", reg,
+ BCM6358_SLED_MAX_COUNT);
+ continue;
+ }
+
+ rc = bcm6358_led(dev, child, reg, mem, lock);
+ if (rc < 0) {
+ of_node_put(child);
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+static const struct of_device_id bcm6358_leds_of_match[] = {
+ { .compatible = "brcm,bcm6358-leds", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, bcm6358_leds_of_match);
+
+static struct platform_driver bcm6358_leds_driver = {
+ .probe = bcm6358_leds_probe,
+ .driver = {
+ .name = "leds-bcm6358",
+ .of_match_table = bcm6358_leds_of_match,
+ },
+};
+
+module_platform_driver(bcm6358_leds_driver);
+
+MODULE_AUTHOR("Álvaro Fernández Rojas <noltari@gmail.com>");
+MODULE_DESCRIPTION("LED driver for BCM6358 controllers");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:leds-bcm6358");
diff --git a/drivers/leds/leds-bd2802.c b/drivers/leds/leds-bd2802.c
new file mode 100644
index 000000000..2b6678f6b
--- /dev/null
+++ b/drivers/leds/leds-bd2802.c
@@ -0,0 +1,799 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * leds-bd2802.c - RGB LED Driver
+ *
+ * Copyright (C) 2009 Samsung Electronics
+ * Kim Kyuwon <q1.kim@samsung.com>
+ *
+ * Datasheet: http://www.rohm.com/products/databook/driver/pdf/bd2802gu-e.pdf
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/gpio/consumer.h>
+#include <linux/delay.h>
+#include <linux/leds.h>
+#include <linux/leds-bd2802.h>
+#include <linux/slab.h>
+#include <linux/pm.h>
+
+#define LED_CTL(rgb2en, rgb1en) ((rgb2en) << 4 | ((rgb1en) << 0))
+
+#define BD2802_LED_OFFSET 0xa
+#define BD2802_COLOR_OFFSET 0x3
+
+#define BD2802_REG_CLKSETUP 0x00
+#define BD2802_REG_CONTROL 0x01
+#define BD2802_REG_HOURSETUP 0x02
+#define BD2802_REG_CURRENT1SETUP 0x03
+#define BD2802_REG_CURRENT2SETUP 0x04
+#define BD2802_REG_WAVEPATTERN 0x05
+
+#define BD2802_CURRENT_032 0x10 /* 3.2mA */
+#define BD2802_CURRENT_000 0x00 /* 0.0mA */
+
+#define BD2802_PATTERN_FULL 0x07
+#define BD2802_PATTERN_HALF 0x03
+
+enum led_ids {
+ LED1,
+ LED2,
+ LED_NUM,
+};
+
+enum led_colors {
+ RED,
+ GREEN,
+ BLUE,
+};
+
+enum led_bits {
+ BD2802_OFF,
+ BD2802_BLINK,
+ BD2802_ON,
+};
+
+/*
+ * State '0' : 'off'
+ * State '1' : 'blink'
+ * State '2' : 'on'.
+ */
+struct led_state {
+ unsigned r:2;
+ unsigned g:2;
+ unsigned b:2;
+};
+
+struct bd2802_led {
+ struct bd2802_led_platform_data *pdata;
+ struct i2c_client *client;
+ struct gpio_desc *reset;
+ struct rw_semaphore rwsem;
+
+ struct led_state led[2];
+
+ /*
+ * Making led_classdev as array is not recommended, because array
+ * members prevent using 'container_of' macro. So repetitive works
+ * are needed.
+ */
+ struct led_classdev cdev_led1r;
+ struct led_classdev cdev_led1g;
+ struct led_classdev cdev_led1b;
+ struct led_classdev cdev_led2r;
+ struct led_classdev cdev_led2g;
+ struct led_classdev cdev_led2b;
+
+ /*
+ * Advanced Configuration Function(ADF) mode:
+ * In ADF mode, user can set registers of BD2802GU directly,
+ * therefore BD2802GU doesn't enter reset state.
+ */
+ int adf_on;
+
+ enum led_ids led_id;
+ enum led_colors color;
+ enum led_bits state;
+
+ /* General attributes of RGB LEDs */
+ int wave_pattern;
+ int rgb_current;
+};
+
+
+/*--------------------------------------------------------------*/
+/* BD2802GU helper functions */
+/*--------------------------------------------------------------*/
+
+static inline int bd2802_is_rgb_off(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color)
+{
+ switch (color) {
+ case RED:
+ return !led->led[id].r;
+ case GREEN:
+ return !led->led[id].g;
+ case BLUE:
+ return !led->led[id].b;
+ default:
+ dev_err(&led->client->dev, "%s: Invalid color\n", __func__);
+ return -EINVAL;
+ }
+}
+
+static inline int bd2802_is_led_off(struct bd2802_led *led, enum led_ids id)
+{
+ if (led->led[id].r || led->led[id].g || led->led[id].b)
+ return 0;
+
+ return 1;
+}
+
+static inline int bd2802_is_all_off(struct bd2802_led *led)
+{
+ int i;
+
+ for (i = 0; i < LED_NUM; i++)
+ if (!bd2802_is_led_off(led, i))
+ return 0;
+
+ return 1;
+}
+
+static inline u8 bd2802_get_base_offset(enum led_ids id, enum led_colors color)
+{
+ return id * BD2802_LED_OFFSET + color * BD2802_COLOR_OFFSET;
+}
+
+static inline u8 bd2802_get_reg_addr(enum led_ids id, enum led_colors color,
+ u8 reg_offset)
+{
+ return reg_offset + bd2802_get_base_offset(id, color);
+}
+
+
+/*--------------------------------------------------------------*/
+/* BD2802GU core functions */
+/*--------------------------------------------------------------*/
+
+static int bd2802_write_byte(struct i2c_client *client, u8 reg, u8 val)
+{
+ int ret = i2c_smbus_write_byte_data(client, reg, val);
+ if (ret >= 0)
+ return 0;
+
+ dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
+ __func__, reg, val, ret);
+
+ return ret;
+}
+
+static void bd2802_update_state(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color, enum led_bits led_bit)
+{
+ int i;
+ u8 value;
+
+ for (i = 0; i < LED_NUM; i++) {
+ if (i == id) {
+ switch (color) {
+ case RED:
+ led->led[i].r = led_bit;
+ break;
+ case GREEN:
+ led->led[i].g = led_bit;
+ break;
+ case BLUE:
+ led->led[i].b = led_bit;
+ break;
+ default:
+ dev_err(&led->client->dev,
+ "%s: Invalid color\n", __func__);
+ return;
+ }
+ }
+ }
+
+ if (led_bit == BD2802_BLINK || led_bit == BD2802_ON)
+ return;
+
+ if (!bd2802_is_led_off(led, id))
+ return;
+
+ if (bd2802_is_all_off(led) && !led->adf_on) {
+ gpiod_set_value(led->reset, 1);
+ return;
+ }
+
+ /*
+ * In this case, other led is turned on, and current led is turned
+ * off. So set RGB LED Control register to stop the current RGB LED
+ */
+ value = (id == LED1) ? LED_CTL(1, 0) : LED_CTL(0, 1);
+ bd2802_write_byte(led->client, BD2802_REG_CONTROL, value);
+}
+
+static void bd2802_configure(struct bd2802_led *led)
+{
+ struct bd2802_led_platform_data *pdata = led->pdata;
+ u8 reg;
+
+ reg = bd2802_get_reg_addr(LED1, RED, BD2802_REG_HOURSETUP);
+ bd2802_write_byte(led->client, reg, pdata->rgb_time);
+
+ reg = bd2802_get_reg_addr(LED2, RED, BD2802_REG_HOURSETUP);
+ bd2802_write_byte(led->client, reg, pdata->rgb_time);
+}
+
+static void bd2802_reset_cancel(struct bd2802_led *led)
+{
+ gpiod_set_value(led->reset, 0);
+ udelay(100);
+ bd2802_configure(led);
+}
+
+static void bd2802_enable(struct bd2802_led *led, enum led_ids id)
+{
+ enum led_ids other_led = (id == LED1) ? LED2 : LED1;
+ u8 value, other_led_on;
+
+ other_led_on = !bd2802_is_led_off(led, other_led);
+ if (id == LED1)
+ value = LED_CTL(other_led_on, 1);
+ else
+ value = LED_CTL(1 , other_led_on);
+
+ bd2802_write_byte(led->client, BD2802_REG_CONTROL, value);
+}
+
+static void bd2802_set_on(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color)
+{
+ u8 reg;
+
+ if (bd2802_is_all_off(led) && !led->adf_on)
+ bd2802_reset_cancel(led);
+
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
+ bd2802_write_byte(led->client, reg, led->rgb_current);
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
+ bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
+ bd2802_write_byte(led->client, reg, BD2802_PATTERN_FULL);
+
+ bd2802_enable(led, id);
+ bd2802_update_state(led, id, color, BD2802_ON);
+}
+
+static void bd2802_set_blink(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color)
+{
+ u8 reg;
+
+ if (bd2802_is_all_off(led) && !led->adf_on)
+ bd2802_reset_cancel(led);
+
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
+ bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
+ bd2802_write_byte(led->client, reg, led->rgb_current);
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
+ bd2802_write_byte(led->client, reg, led->wave_pattern);
+
+ bd2802_enable(led, id);
+ bd2802_update_state(led, id, color, BD2802_BLINK);
+}
+
+static void bd2802_turn_on(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color, enum led_bits led_bit)
+{
+ if (led_bit == BD2802_OFF) {
+ dev_err(&led->client->dev,
+ "Only 'blink' and 'on' are allowed\n");
+ return;
+ }
+
+ if (led_bit == BD2802_BLINK)
+ bd2802_set_blink(led, id, color);
+ else
+ bd2802_set_on(led, id, color);
+}
+
+static void bd2802_turn_off(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color)
+{
+ u8 reg;
+
+ if (bd2802_is_rgb_off(led, id, color))
+ return;
+
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
+ bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
+ bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
+
+ bd2802_update_state(led, id, color, BD2802_OFF);
+}
+
+#define BD2802_SET_REGISTER(reg_addr, reg_name) \
+static ssize_t bd2802_store_reg##reg_addr(struct device *dev, \
+ struct device_attribute *attr, const char *buf, size_t count) \
+{ \
+ struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
+ unsigned long val; \
+ int ret; \
+ if (!count) \
+ return -EINVAL; \
+ ret = kstrtoul(buf, 16, &val); \
+ if (ret) \
+ return ret; \
+ down_write(&led->rwsem); \
+ bd2802_write_byte(led->client, reg_addr, (u8) val); \
+ up_write(&led->rwsem); \
+ return count; \
+} \
+static struct device_attribute bd2802_reg##reg_addr##_attr = { \
+ .attr = {.name = reg_name, .mode = 0644}, \
+ .store = bd2802_store_reg##reg_addr, \
+};
+
+BD2802_SET_REGISTER(0x00, "0x00");
+BD2802_SET_REGISTER(0x01, "0x01");
+BD2802_SET_REGISTER(0x02, "0x02");
+BD2802_SET_REGISTER(0x03, "0x03");
+BD2802_SET_REGISTER(0x04, "0x04");
+BD2802_SET_REGISTER(0x05, "0x05");
+BD2802_SET_REGISTER(0x06, "0x06");
+BD2802_SET_REGISTER(0x07, "0x07");
+BD2802_SET_REGISTER(0x08, "0x08");
+BD2802_SET_REGISTER(0x09, "0x09");
+BD2802_SET_REGISTER(0x0a, "0x0a");
+BD2802_SET_REGISTER(0x0b, "0x0b");
+BD2802_SET_REGISTER(0x0c, "0x0c");
+BD2802_SET_REGISTER(0x0d, "0x0d");
+BD2802_SET_REGISTER(0x0e, "0x0e");
+BD2802_SET_REGISTER(0x0f, "0x0f");
+BD2802_SET_REGISTER(0x10, "0x10");
+BD2802_SET_REGISTER(0x11, "0x11");
+BD2802_SET_REGISTER(0x12, "0x12");
+BD2802_SET_REGISTER(0x13, "0x13");
+BD2802_SET_REGISTER(0x14, "0x14");
+BD2802_SET_REGISTER(0x15, "0x15");
+
+static struct device_attribute *bd2802_addr_attributes[] = {
+ &bd2802_reg0x00_attr,
+ &bd2802_reg0x01_attr,
+ &bd2802_reg0x02_attr,
+ &bd2802_reg0x03_attr,
+ &bd2802_reg0x04_attr,
+ &bd2802_reg0x05_attr,
+ &bd2802_reg0x06_attr,
+ &bd2802_reg0x07_attr,
+ &bd2802_reg0x08_attr,
+ &bd2802_reg0x09_attr,
+ &bd2802_reg0x0a_attr,
+ &bd2802_reg0x0b_attr,
+ &bd2802_reg0x0c_attr,
+ &bd2802_reg0x0d_attr,
+ &bd2802_reg0x0e_attr,
+ &bd2802_reg0x0f_attr,
+ &bd2802_reg0x10_attr,
+ &bd2802_reg0x11_attr,
+ &bd2802_reg0x12_attr,
+ &bd2802_reg0x13_attr,
+ &bd2802_reg0x14_attr,
+ &bd2802_reg0x15_attr,
+};
+
+static void bd2802_enable_adv_conf(struct bd2802_led *led)
+{
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++) {
+ ret = device_create_file(&led->client->dev,
+ bd2802_addr_attributes[i]);
+ if (ret) {
+ dev_err(&led->client->dev, "failed: sysfs file %s\n",
+ bd2802_addr_attributes[i]->attr.name);
+ goto failed_remove_files;
+ }
+ }
+
+ if (bd2802_is_all_off(led))
+ bd2802_reset_cancel(led);
+
+ led->adf_on = 1;
+
+ return;
+
+failed_remove_files:
+ for (i--; i >= 0; i--)
+ device_remove_file(&led->client->dev,
+ bd2802_addr_attributes[i]);
+}
+
+static void bd2802_disable_adv_conf(struct bd2802_led *led)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++)
+ device_remove_file(&led->client->dev,
+ bd2802_addr_attributes[i]);
+
+ if (bd2802_is_all_off(led))
+ gpiod_set_value(led->reset, 1);
+
+ led->adf_on = 0;
+}
+
+static ssize_t bd2802_show_adv_conf(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ ssize_t ret;
+
+ down_read(&led->rwsem);
+ if (led->adf_on)
+ ret = sprintf(buf, "on\n");
+ else
+ ret = sprintf(buf, "off\n");
+ up_read(&led->rwsem);
+
+ return ret;
+}
+
+static ssize_t bd2802_store_adv_conf(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));
+
+ if (!count)
+ return -EINVAL;
+
+ down_write(&led->rwsem);
+ if (!led->adf_on && !strncmp(buf, "on", 2))
+ bd2802_enable_adv_conf(led);
+ else if (led->adf_on && !strncmp(buf, "off", 3))
+ bd2802_disable_adv_conf(led);
+ up_write(&led->rwsem);
+
+ return count;
+}
+
+static struct device_attribute bd2802_adv_conf_attr = {
+ .attr = {
+ .name = "advanced_configuration",
+ .mode = 0644,
+ },
+ .show = bd2802_show_adv_conf,
+ .store = bd2802_store_adv_conf,
+};
+
+#define BD2802_CONTROL_ATTR(attr_name, name_str) \
+static ssize_t bd2802_show_##attr_name(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
+ ssize_t ret; \
+ down_read(&led->rwsem); \
+ ret = sprintf(buf, "0x%02x\n", led->attr_name); \
+ up_read(&led->rwsem); \
+ return ret; \
+} \
+static ssize_t bd2802_store_##attr_name(struct device *dev, \
+ struct device_attribute *attr, const char *buf, size_t count) \
+{ \
+ struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
+ unsigned long val; \
+ int ret; \
+ if (!count) \
+ return -EINVAL; \
+ ret = kstrtoul(buf, 16, &val); \
+ if (ret) \
+ return ret; \
+ down_write(&led->rwsem); \
+ led->attr_name = val; \
+ up_write(&led->rwsem); \
+ return count; \
+} \
+static struct device_attribute bd2802_##attr_name##_attr = { \
+ .attr = { \
+ .name = name_str, \
+ .mode = 0644, \
+ }, \
+ .show = bd2802_show_##attr_name, \
+ .store = bd2802_store_##attr_name, \
+};
+
+BD2802_CONTROL_ATTR(wave_pattern, "wave_pattern");
+BD2802_CONTROL_ATTR(rgb_current, "rgb_current");
+
+static struct device_attribute *bd2802_attributes[] = {
+ &bd2802_adv_conf_attr,
+ &bd2802_wave_pattern_attr,
+ &bd2802_rgb_current_attr,
+};
+
+#define BD2802_CONTROL_RGBS(name, id, clr) \
+static int bd2802_set_##name##_brightness(struct led_classdev *led_cdev,\
+ enum led_brightness value) \
+{ \
+ struct bd2802_led *led = \
+ container_of(led_cdev, struct bd2802_led, cdev_##name); \
+ led->led_id = id; \
+ led->color = clr; \
+ if (value == LED_OFF) { \
+ led->state = BD2802_OFF; \
+ bd2802_turn_off(led, led->led_id, led->color); \
+ } else { \
+ led->state = BD2802_ON; \
+ bd2802_turn_on(led, led->led_id, led->color, BD2802_ON);\
+ } \
+ return 0; \
+} \
+static int bd2802_set_##name##_blink(struct led_classdev *led_cdev, \
+ unsigned long *delay_on, unsigned long *delay_off) \
+{ \
+ struct bd2802_led *led = \
+ container_of(led_cdev, struct bd2802_led, cdev_##name); \
+ if (*delay_on == 0 || *delay_off == 0) \
+ return -EINVAL; \
+ led->led_id = id; \
+ led->color = clr; \
+ led->state = BD2802_BLINK; \
+ bd2802_turn_on(led, led->led_id, led->color, BD2802_BLINK); \
+ return 0; \
+}
+
+BD2802_CONTROL_RGBS(led1r, LED1, RED);
+BD2802_CONTROL_RGBS(led1g, LED1, GREEN);
+BD2802_CONTROL_RGBS(led1b, LED1, BLUE);
+BD2802_CONTROL_RGBS(led2r, LED2, RED);
+BD2802_CONTROL_RGBS(led2g, LED2, GREEN);
+BD2802_CONTROL_RGBS(led2b, LED2, BLUE);
+
+static int bd2802_register_led_classdev(struct bd2802_led *led)
+{
+ int ret;
+
+ led->cdev_led1r.name = "led1_R";
+ led->cdev_led1r.brightness = LED_OFF;
+ led->cdev_led1r.brightness_set_blocking = bd2802_set_led1r_brightness;
+ led->cdev_led1r.blink_set = bd2802_set_led1r_blink;
+
+ ret = led_classdev_register(&led->client->dev, &led->cdev_led1r);
+ if (ret < 0) {
+ dev_err(&led->client->dev, "couldn't register LED %s\n",
+ led->cdev_led1r.name);
+ goto failed_unregister_led1_R;
+ }
+
+ led->cdev_led1g.name = "led1_G";
+ led->cdev_led1g.brightness = LED_OFF;
+ led->cdev_led1g.brightness_set_blocking = bd2802_set_led1g_brightness;
+ led->cdev_led1g.blink_set = bd2802_set_led1g_blink;
+
+ ret = led_classdev_register(&led->client->dev, &led->cdev_led1g);
+ if (ret < 0) {
+ dev_err(&led->client->dev, "couldn't register LED %s\n",
+ led->cdev_led1g.name);
+ goto failed_unregister_led1_G;
+ }
+
+ led->cdev_led1b.name = "led1_B";
+ led->cdev_led1b.brightness = LED_OFF;
+ led->cdev_led1b.brightness_set_blocking = bd2802_set_led1b_brightness;
+ led->cdev_led1b.blink_set = bd2802_set_led1b_blink;
+
+ ret = led_classdev_register(&led->client->dev, &led->cdev_led1b);
+ if (ret < 0) {
+ dev_err(&led->client->dev, "couldn't register LED %s\n",
+ led->cdev_led1b.name);
+ goto failed_unregister_led1_B;
+ }
+
+ led->cdev_led2r.name = "led2_R";
+ led->cdev_led2r.brightness = LED_OFF;
+ led->cdev_led2r.brightness_set_blocking = bd2802_set_led2r_brightness;
+ led->cdev_led2r.blink_set = bd2802_set_led2r_blink;
+
+ ret = led_classdev_register(&led->client->dev, &led->cdev_led2r);
+ if (ret < 0) {
+ dev_err(&led->client->dev, "couldn't register LED %s\n",
+ led->cdev_led2r.name);
+ goto failed_unregister_led2_R;
+ }
+
+ led->cdev_led2g.name = "led2_G";
+ led->cdev_led2g.brightness = LED_OFF;
+ led->cdev_led2g.brightness_set_blocking = bd2802_set_led2g_brightness;
+ led->cdev_led2g.blink_set = bd2802_set_led2g_blink;
+
+ ret = led_classdev_register(&led->client->dev, &led->cdev_led2g);
+ if (ret < 0) {
+ dev_err(&led->client->dev, "couldn't register LED %s\n",
+ led->cdev_led2g.name);
+ goto failed_unregister_led2_G;
+ }
+
+ led->cdev_led2b.name = "led2_B";
+ led->cdev_led2b.brightness = LED_OFF;
+ led->cdev_led2b.brightness_set_blocking = bd2802_set_led2b_brightness;
+ led->cdev_led2b.blink_set = bd2802_set_led2b_blink;
+ led->cdev_led2b.flags |= LED_CORE_SUSPENDRESUME;
+
+ ret = led_classdev_register(&led->client->dev, &led->cdev_led2b);
+ if (ret < 0) {
+ dev_err(&led->client->dev, "couldn't register LED %s\n",
+ led->cdev_led2b.name);
+ goto failed_unregister_led2_B;
+ }
+
+ return 0;
+
+failed_unregister_led2_B:
+ led_classdev_unregister(&led->cdev_led2g);
+failed_unregister_led2_G:
+ led_classdev_unregister(&led->cdev_led2r);
+failed_unregister_led2_R:
+ led_classdev_unregister(&led->cdev_led1b);
+failed_unregister_led1_B:
+ led_classdev_unregister(&led->cdev_led1g);
+failed_unregister_led1_G:
+ led_classdev_unregister(&led->cdev_led1r);
+failed_unregister_led1_R:
+
+ return ret;
+}
+
+static void bd2802_unregister_led_classdev(struct bd2802_led *led)
+{
+ led_classdev_unregister(&led->cdev_led2b);
+ led_classdev_unregister(&led->cdev_led2g);
+ led_classdev_unregister(&led->cdev_led2r);
+ led_classdev_unregister(&led->cdev_led1b);
+ led_classdev_unregister(&led->cdev_led1g);
+ led_classdev_unregister(&led->cdev_led1r);
+}
+
+static int bd2802_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct bd2802_led *led;
+ int ret, i;
+
+ led = devm_kzalloc(&client->dev, sizeof(struct bd2802_led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->client = client;
+ i2c_set_clientdata(client, led);
+
+ /*
+ * Configure RESET GPIO (L: RESET, H: RESET cancel)
+ *
+ * We request the reset GPIO as OUT_LOW which means de-asserted,
+ * board files specifying this GPIO line in a machine descriptor
+ * table should take care to specify GPIO_ACTIVE_LOW for this line.
+ */
+ led->reset = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(led->reset))
+ return PTR_ERR(led->reset);
+
+ /* Tacss = min 0.1ms */
+ udelay(100);
+
+ /* Detect BD2802GU */
+ ret = bd2802_write_byte(client, BD2802_REG_CLKSETUP, 0x00);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to detect device\n");
+ return ret;
+ } else
+ dev_info(&client->dev, "return 0x%02x\n", ret);
+
+ /* To save the power, reset BD2802 after detecting */
+ gpiod_set_value(led->reset, 1);
+
+ /* Default attributes */
+ led->wave_pattern = BD2802_PATTERN_HALF;
+ led->rgb_current = BD2802_CURRENT_032;
+
+ init_rwsem(&led->rwsem);
+
+ for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) {
+ ret = device_create_file(&led->client->dev,
+ bd2802_attributes[i]);
+ if (ret) {
+ dev_err(&led->client->dev, "failed: sysfs file %s\n",
+ bd2802_attributes[i]->attr.name);
+ goto failed_unregister_dev_file;
+ }
+ }
+
+ ret = bd2802_register_led_classdev(led);
+ if (ret < 0)
+ goto failed_unregister_dev_file;
+
+ return 0;
+
+failed_unregister_dev_file:
+ for (i--; i >= 0; i--)
+ device_remove_file(&led->client->dev, bd2802_attributes[i]);
+ return ret;
+}
+
+static void bd2802_remove(struct i2c_client *client)
+{
+ struct bd2802_led *led = i2c_get_clientdata(client);
+ int i;
+
+ gpiod_set_value(led->reset, 1);
+ bd2802_unregister_led_classdev(led);
+ if (led->adf_on)
+ bd2802_disable_adv_conf(led);
+ for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++)
+ device_remove_file(&led->client->dev, bd2802_attributes[i]);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static void bd2802_restore_state(struct bd2802_led *led)
+{
+ int i;
+
+ for (i = 0; i < LED_NUM; i++) {
+ if (led->led[i].r)
+ bd2802_turn_on(led, i, RED, led->led[i].r);
+ if (led->led[i].g)
+ bd2802_turn_on(led, i, GREEN, led->led[i].g);
+ if (led->led[i].b)
+ bd2802_turn_on(led, i, BLUE, led->led[i].b);
+ }
+}
+
+static int bd2802_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct bd2802_led *led = i2c_get_clientdata(client);
+
+ gpiod_set_value(led->reset, 1);
+
+ return 0;
+}
+
+static int bd2802_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct bd2802_led *led = i2c_get_clientdata(client);
+
+ if (!bd2802_is_all_off(led) || led->adf_on) {
+ bd2802_reset_cancel(led);
+ bd2802_restore_state(led);
+ }
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(bd2802_pm, bd2802_suspend, bd2802_resume);
+
+static const struct i2c_device_id bd2802_id[] = {
+ { "BD2802", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, bd2802_id);
+
+static struct i2c_driver bd2802_i2c_driver = {
+ .driver = {
+ .name = "BD2802",
+ .pm = &bd2802_pm,
+ },
+ .probe = bd2802_probe,
+ .remove = bd2802_remove,
+ .id_table = bd2802_id,
+};
+
+module_i2c_driver(bd2802_i2c_driver);
+
+MODULE_AUTHOR("Kim Kyuwon <q1.kim@samsung.com>");
+MODULE_DESCRIPTION("BD2802 LED driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-blinkm.c b/drivers/leds/leds-blinkm.c
new file mode 100644
index 000000000..3fb6a2fda
--- /dev/null
+++ b/drivers/leds/leds-blinkm.c
@@ -0,0 +1,746 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * leds-blinkm.c
+ * (c) Jan-Simon Möller (dl9pf@gmx.de)
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/sysfs.h>
+#include <linux/printk.h>
+#include <linux/pm_runtime.h>
+#include <linux/leds.h>
+#include <linux/delay.h>
+
+/* Addresses to scan - BlinkM is on 0x09 by default*/
+static const unsigned short normal_i2c[] = { 0x09, I2C_CLIENT_END };
+
+static int blinkm_transfer_hw(struct i2c_client *client, int cmd);
+static int blinkm_test_run(struct i2c_client *client);
+
+struct blinkm_led {
+ struct i2c_client *i2c_client;
+ struct led_classdev led_cdev;
+ int id;
+};
+
+#define cdev_to_blmled(c) container_of(c, struct blinkm_led, led_cdev)
+
+struct blinkm_data {
+ struct i2c_client *i2c_client;
+ struct mutex update_lock;
+ /* used for led class interface */
+ struct blinkm_led blinkm_leds[3];
+ /* used for "blinkm" sysfs interface */
+ u8 red; /* color red */
+ u8 green; /* color green */
+ u8 blue; /* color blue */
+ /* next values to use for transfer */
+ u8 next_red; /* color red */
+ u8 next_green; /* color green */
+ u8 next_blue; /* color blue */
+ /* internal use */
+ u8 args[7]; /* set of args for transmission */
+ u8 i2c_addr; /* i2c addr */
+ u8 fw_ver; /* firmware version */
+ /* used, but not from userspace */
+ u8 hue; /* HSB hue */
+ u8 saturation; /* HSB saturation */
+ u8 brightness; /* HSB brightness */
+ u8 next_hue; /* HSB hue */
+ u8 next_saturation; /* HSB saturation */
+ u8 next_brightness; /* HSB brightness */
+ /* currently unused / todo */
+ u8 fade_speed; /* fade speed 1 - 255 */
+ s8 time_adjust; /* time adjust -128 - 127 */
+ u8 fade:1; /* fade on = 1, off = 0 */
+ u8 rand:1; /* rand fade mode on = 1 */
+ u8 script_id; /* script ID */
+ u8 script_repeats; /* repeats of script */
+ u8 script_startline; /* line to start */
+};
+
+/* Colors */
+#define RED 0
+#define GREEN 1
+#define BLUE 2
+
+/* mapping command names to cmd chars - see datasheet */
+#define BLM_GO_RGB 0
+#define BLM_FADE_RGB 1
+#define BLM_FADE_HSB 2
+#define BLM_FADE_RAND_RGB 3
+#define BLM_FADE_RAND_HSB 4
+#define BLM_PLAY_SCRIPT 5
+#define BLM_STOP_SCRIPT 6
+#define BLM_SET_FADE_SPEED 7
+#define BLM_SET_TIME_ADJ 8
+#define BLM_GET_CUR_RGB 9
+#define BLM_WRITE_SCRIPT_LINE 10
+#define BLM_READ_SCRIPT_LINE 11
+#define BLM_SET_SCRIPT_LR 12 /* Length & Repeats */
+#define BLM_SET_ADDR 13
+#define BLM_GET_ADDR 14
+#define BLM_GET_FW_VER 15
+#define BLM_SET_STARTUP_PARAM 16
+
+/* BlinkM Commands
+ * as extracted out of the datasheet:
+ *
+ * cmdchar = command (ascii)
+ * cmdbyte = command in hex
+ * nr_args = number of arguments (to send)
+ * nr_ret = number of return values (to read)
+ * dir = direction (0 = read, 1 = write, 2 = both)
+ *
+ */
+static const struct {
+ char cmdchar;
+ u8 cmdbyte;
+ u8 nr_args;
+ u8 nr_ret;
+ u8 dir:2;
+} blinkm_cmds[17] = {
+ /* cmdchar, cmdbyte, nr_args, nr_ret, dir */
+ { 'n', 0x6e, 3, 0, 1},
+ { 'c', 0x63, 3, 0, 1},
+ { 'h', 0x68, 3, 0, 1},
+ { 'C', 0x43, 3, 0, 1},
+ { 'H', 0x48, 3, 0, 1},
+ { 'p', 0x70, 3, 0, 1},
+ { 'o', 0x6f, 0, 0, 1},
+ { 'f', 0x66, 1, 0, 1},
+ { 't', 0x74, 1, 0, 1},
+ { 'g', 0x67, 0, 3, 0},
+ { 'W', 0x57, 7, 0, 1},
+ { 'R', 0x52, 2, 5, 2},
+ { 'L', 0x4c, 3, 0, 1},
+ { 'A', 0x41, 4, 0, 1},
+ { 'a', 0x61, 0, 1, 0},
+ { 'Z', 0x5a, 0, 1, 0},
+ { 'B', 0x42, 5, 0, 1},
+};
+
+static ssize_t show_color_common(struct device *dev, char *buf, int color)
+{
+ struct i2c_client *client;
+ struct blinkm_data *data;
+ int ret;
+
+ client = to_i2c_client(dev);
+ data = i2c_get_clientdata(client);
+
+ ret = blinkm_transfer_hw(client, BLM_GET_CUR_RGB);
+ if (ret < 0)
+ return ret;
+ switch (color) {
+ case RED:
+ return scnprintf(buf, PAGE_SIZE, "%02X\n", data->red);
+ case GREEN:
+ return scnprintf(buf, PAGE_SIZE, "%02X\n", data->green);
+ case BLUE:
+ return scnprintf(buf, PAGE_SIZE, "%02X\n", data->blue);
+ default:
+ return -EINVAL;
+ }
+ return -EINVAL;
+}
+
+static int store_color_common(struct device *dev, const char *buf, int color)
+{
+ struct i2c_client *client;
+ struct blinkm_data *data;
+ int ret;
+ u8 value;
+
+ client = to_i2c_client(dev);
+ data = i2c_get_clientdata(client);
+
+ ret = kstrtou8(buf, 10, &value);
+ if (ret < 0) {
+ dev_err(dev, "BlinkM: value too large!\n");
+ return ret;
+ }
+
+ switch (color) {
+ case RED:
+ data->next_red = value;
+ break;
+ case GREEN:
+ data->next_green = value;
+ break;
+ case BLUE:
+ data->next_blue = value;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ dev_dbg(dev, "next_red = %d, next_green = %d, next_blue = %d\n",
+ data->next_red, data->next_green, data->next_blue);
+
+ /* if mode ... */
+ ret = blinkm_transfer_hw(client, BLM_GO_RGB);
+ if (ret < 0) {
+ dev_err(dev, "BlinkM: can't set RGB\n");
+ return ret;
+ }
+ return 0;
+}
+
+static ssize_t red_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ return show_color_common(dev, buf, RED);
+}
+
+static ssize_t red_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+
+ ret = store_color_common(dev, buf, RED);
+ if (ret < 0)
+ return ret;
+ return count;
+}
+
+static DEVICE_ATTR_RW(red);
+
+static ssize_t green_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ return show_color_common(dev, buf, GREEN);
+}
+
+static ssize_t green_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+
+ int ret;
+
+ ret = store_color_common(dev, buf, GREEN);
+ if (ret < 0)
+ return ret;
+ return count;
+}
+
+static DEVICE_ATTR_RW(green);
+
+static ssize_t blue_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ return show_color_common(dev, buf, BLUE);
+}
+
+static ssize_t blue_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+
+ ret = store_color_common(dev, buf, BLUE);
+ if (ret < 0)
+ return ret;
+ return count;
+}
+
+static DEVICE_ATTR_RW(blue);
+
+static ssize_t test_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE,
+ "#Write into test to start test sequence!#\n");
+}
+
+static ssize_t test_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+
+ struct i2c_client *client;
+ int ret;
+ client = to_i2c_client(dev);
+
+ /*test */
+ ret = blinkm_test_run(client);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static DEVICE_ATTR_RW(test);
+
+/* TODO: HSB, fade, timeadj, script ... */
+
+static struct attribute *blinkm_attrs[] = {
+ &dev_attr_red.attr,
+ &dev_attr_green.attr,
+ &dev_attr_blue.attr,
+ &dev_attr_test.attr,
+ NULL,
+};
+
+static const struct attribute_group blinkm_group = {
+ .name = "blinkm",
+ .attrs = blinkm_attrs,
+};
+
+static int blinkm_write(struct i2c_client *client, int cmd, u8 *arg)
+{
+ int result;
+ int i;
+ int arglen = blinkm_cmds[cmd].nr_args;
+ /* write out cmd to blinkm - always / default step */
+ result = i2c_smbus_write_byte(client, blinkm_cmds[cmd].cmdbyte);
+ if (result < 0)
+ return result;
+ /* no args to write out */
+ if (arglen == 0)
+ return 0;
+
+ for (i = 0; i < arglen; i++) {
+ /* repeat for arglen */
+ result = i2c_smbus_write_byte(client, arg[i]);
+ if (result < 0)
+ return result;
+ }
+ return 0;
+}
+
+static int blinkm_read(struct i2c_client *client, int cmd, u8 *arg)
+{
+ int result;
+ int i;
+ int retlen = blinkm_cmds[cmd].nr_ret;
+ for (i = 0; i < retlen; i++) {
+ /* repeat for retlen */
+ result = i2c_smbus_read_byte(client);
+ if (result < 0)
+ return result;
+ arg[i] = result;
+ }
+
+ return 0;
+}
+
+static int blinkm_transfer_hw(struct i2c_client *client, int cmd)
+{
+ /* the protocol is simple but non-standard:
+ * e.g. cmd 'g' (= 0x67) for "get device address"
+ * - which defaults to 0x09 - would be the sequence:
+ * a) write 0x67 to the device (byte write)
+ * b) read the value (0x09) back right after (byte read)
+ *
+ * Watch out for "unfinished" sequences (i.e. not enough reads
+ * or writes after a command. It will make the blinkM misbehave.
+ * Sequence is key here.
+ */
+
+ /* args / return are in private data struct */
+ struct blinkm_data *data = i2c_get_clientdata(client);
+
+ /* We start hardware transfers which are not to be
+ * mixed with other commands. Aquire a lock now. */
+ if (mutex_lock_interruptible(&data->update_lock) < 0)
+ return -EAGAIN;
+
+ /* switch cmd - usually write before reads */
+ switch (cmd) {
+ case BLM_FADE_RAND_RGB:
+ case BLM_GO_RGB:
+ case BLM_FADE_RGB:
+ data->args[0] = data->next_red;
+ data->args[1] = data->next_green;
+ data->args[2] = data->next_blue;
+ blinkm_write(client, cmd, data->args);
+ data->red = data->args[0];
+ data->green = data->args[1];
+ data->blue = data->args[2];
+ break;
+ case BLM_FADE_HSB:
+ case BLM_FADE_RAND_HSB:
+ data->args[0] = data->next_hue;
+ data->args[1] = data->next_saturation;
+ data->args[2] = data->next_brightness;
+ blinkm_write(client, cmd, data->args);
+ data->hue = data->next_hue;
+ data->saturation = data->next_saturation;
+ data->brightness = data->next_brightness;
+ break;
+ case BLM_PLAY_SCRIPT:
+ data->args[0] = data->script_id;
+ data->args[1] = data->script_repeats;
+ data->args[2] = data->script_startline;
+ blinkm_write(client, cmd, data->args);
+ break;
+ case BLM_STOP_SCRIPT:
+ blinkm_write(client, cmd, NULL);
+ break;
+ case BLM_GET_CUR_RGB:
+ data->args[0] = data->red;
+ data->args[1] = data->green;
+ data->args[2] = data->blue;
+ blinkm_write(client, cmd, NULL);
+ blinkm_read(client, cmd, data->args);
+ data->red = data->args[0];
+ data->green = data->args[1];
+ data->blue = data->args[2];
+ break;
+ case BLM_GET_ADDR:
+ data->args[0] = data->i2c_addr;
+ blinkm_write(client, cmd, NULL);
+ blinkm_read(client, cmd, data->args);
+ data->i2c_addr = data->args[0];
+ break;
+ case BLM_SET_TIME_ADJ:
+ case BLM_SET_FADE_SPEED:
+ case BLM_READ_SCRIPT_LINE:
+ case BLM_WRITE_SCRIPT_LINE:
+ case BLM_SET_SCRIPT_LR:
+ case BLM_SET_ADDR:
+ case BLM_GET_FW_VER:
+ case BLM_SET_STARTUP_PARAM:
+ dev_err(&client->dev,
+ "BlinkM: cmd %d not implemented yet.\n", cmd);
+ break;
+ default:
+ dev_err(&client->dev, "BlinkM: unknown command %d\n", cmd);
+ mutex_unlock(&data->update_lock);
+ return -EINVAL;
+ } /* end switch(cmd) */
+
+ /* transfers done, unlock */
+ mutex_unlock(&data->update_lock);
+ return 0;
+}
+
+static int blinkm_led_common_set(struct led_classdev *led_cdev,
+ enum led_brightness value, int color)
+{
+ /* led_brightness is 0, 127 or 255 - we just use it here as-is */
+ struct blinkm_led *led = cdev_to_blmled(led_cdev);
+ struct blinkm_data *data = i2c_get_clientdata(led->i2c_client);
+
+ switch (color) {
+ case RED:
+ /* bail out if there's no change */
+ if (data->next_red == (u8) value)
+ return 0;
+ data->next_red = (u8) value;
+ break;
+ case GREEN:
+ /* bail out if there's no change */
+ if (data->next_green == (u8) value)
+ return 0;
+ data->next_green = (u8) value;
+ break;
+ case BLUE:
+ /* bail out if there's no change */
+ if (data->next_blue == (u8) value)
+ return 0;
+ data->next_blue = (u8) value;
+ break;
+
+ default:
+ dev_err(&led->i2c_client->dev, "BlinkM: unknown color.\n");
+ return -EINVAL;
+ }
+
+ blinkm_transfer_hw(led->i2c_client, BLM_GO_RGB);
+ dev_dbg(&led->i2c_client->dev,
+ "# DONE # next_red = %d, next_green = %d,"
+ " next_blue = %d\n",
+ data->next_red, data->next_green,
+ data->next_blue);
+ return 0;
+}
+
+static int blinkm_led_red_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ return blinkm_led_common_set(led_cdev, value, RED);
+}
+
+static int blinkm_led_green_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ return blinkm_led_common_set(led_cdev, value, GREEN);
+}
+
+static int blinkm_led_blue_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ return blinkm_led_common_set(led_cdev, value, BLUE);
+}
+
+static void blinkm_init_hw(struct i2c_client *client)
+{
+ blinkm_transfer_hw(client, BLM_STOP_SCRIPT);
+ blinkm_transfer_hw(client, BLM_GO_RGB);
+}
+
+static int blinkm_test_run(struct i2c_client *client)
+{
+ int ret;
+ struct blinkm_data *data = i2c_get_clientdata(client);
+
+ data->next_red = 0x01;
+ data->next_green = 0x05;
+ data->next_blue = 0x10;
+ ret = blinkm_transfer_hw(client, BLM_GO_RGB);
+ if (ret < 0)
+ return ret;
+ msleep(2000);
+
+ data->next_red = 0x25;
+ data->next_green = 0x10;
+ data->next_blue = 0x31;
+ ret = blinkm_transfer_hw(client, BLM_FADE_RGB);
+ if (ret < 0)
+ return ret;
+ msleep(2000);
+
+ data->next_hue = 0x50;
+ data->next_saturation = 0x10;
+ data->next_brightness = 0x20;
+ ret = blinkm_transfer_hw(client, BLM_FADE_HSB);
+ if (ret < 0)
+ return ret;
+ msleep(2000);
+
+ return 0;
+}
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int blinkm_detect(struct i2c_client *client, struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ int ret;
+ int count = 99;
+ u8 tmpargs[7];
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
+ | I2C_FUNC_SMBUS_WORD_DATA
+ | I2C_FUNC_SMBUS_WRITE_BYTE))
+ return -ENODEV;
+
+ /* Now, we do the remaining detection. Simple for now. */
+ /* We might need more guards to protect other i2c slaves */
+
+ /* make sure the blinkM is balanced (read/writes) */
+ while (count > 0) {
+ ret = blinkm_write(client, BLM_GET_ADDR, NULL);
+ if (ret)
+ return ret;
+ usleep_range(5000, 10000);
+ ret = blinkm_read(client, BLM_GET_ADDR, tmpargs);
+ if (ret)
+ return ret;
+ usleep_range(5000, 10000);
+ if (tmpargs[0] == 0x09)
+ count = 0;
+ count--;
+ }
+
+ /* Step 1: Read BlinkM address back - cmd_char 'a' */
+ ret = blinkm_write(client, BLM_GET_ADDR, NULL);
+ if (ret < 0)
+ return ret;
+ usleep_range(20000, 30000); /* allow a small delay */
+ ret = blinkm_read(client, BLM_GET_ADDR, tmpargs);
+ if (ret < 0)
+ return ret;
+
+ if (tmpargs[0] != 0x09) {
+ dev_err(&client->dev, "enodev DEV ADDR = 0x%02X\n", tmpargs[0]);
+ return -ENODEV;
+ }
+
+ strlcpy(info->type, "blinkm", I2C_NAME_SIZE);
+ return 0;
+}
+
+static int blinkm_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct blinkm_data *data;
+ struct blinkm_led *led[3];
+ int err, i;
+ char blinkm_led_name[28];
+
+ data = devm_kzalloc(&client->dev,
+ sizeof(struct blinkm_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ data->i2c_addr = 0x08;
+ /* i2c addr - use fake addr of 0x08 initially (real is 0x09) */
+ data->fw_ver = 0xfe;
+ /* firmware version - use fake until we read real value
+ * (currently broken - BlinkM confused!) */
+ data->script_id = 0x01;
+ data->i2c_client = client;
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+
+ /* Register sysfs hooks */
+ err = sysfs_create_group(&client->dev.kobj, &blinkm_group);
+ if (err < 0) {
+ dev_err(&client->dev, "couldn't register sysfs group\n");
+ goto exit;
+ }
+
+ for (i = 0; i < 3; i++) {
+ /* RED = 0, GREEN = 1, BLUE = 2 */
+ led[i] = &data->blinkm_leds[i];
+ led[i]->i2c_client = client;
+ led[i]->id = i;
+ led[i]->led_cdev.max_brightness = 255;
+ led[i]->led_cdev.flags = LED_CORE_SUSPENDRESUME;
+ switch (i) {
+ case RED:
+ snprintf(blinkm_led_name, sizeof(blinkm_led_name),
+ "blinkm-%d-%d-red",
+ client->adapter->nr,
+ client->addr);
+ led[i]->led_cdev.name = blinkm_led_name;
+ led[i]->led_cdev.brightness_set_blocking =
+ blinkm_led_red_set;
+ err = led_classdev_register(&client->dev,
+ &led[i]->led_cdev);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "couldn't register LED %s\n",
+ led[i]->led_cdev.name);
+ goto failred;
+ }
+ break;
+ case GREEN:
+ snprintf(blinkm_led_name, sizeof(blinkm_led_name),
+ "blinkm-%d-%d-green",
+ client->adapter->nr,
+ client->addr);
+ led[i]->led_cdev.name = blinkm_led_name;
+ led[i]->led_cdev.brightness_set_blocking =
+ blinkm_led_green_set;
+ err = led_classdev_register(&client->dev,
+ &led[i]->led_cdev);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "couldn't register LED %s\n",
+ led[i]->led_cdev.name);
+ goto failgreen;
+ }
+ break;
+ case BLUE:
+ snprintf(blinkm_led_name, sizeof(blinkm_led_name),
+ "blinkm-%d-%d-blue",
+ client->adapter->nr,
+ client->addr);
+ led[i]->led_cdev.name = blinkm_led_name;
+ led[i]->led_cdev.brightness_set_blocking =
+ blinkm_led_blue_set;
+ err = led_classdev_register(&client->dev,
+ &led[i]->led_cdev);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "couldn't register LED %s\n",
+ led[i]->led_cdev.name);
+ goto failblue;
+ }
+ break;
+ } /* end switch */
+ } /* end for */
+
+ /* Initialize the blinkm */
+ blinkm_init_hw(client);
+
+ return 0;
+
+failblue:
+ led_classdev_unregister(&led[GREEN]->led_cdev);
+
+failgreen:
+ led_classdev_unregister(&led[RED]->led_cdev);
+
+failred:
+ sysfs_remove_group(&client->dev.kobj, &blinkm_group);
+exit:
+ return err;
+}
+
+static void blinkm_remove(struct i2c_client *client)
+{
+ struct blinkm_data *data = i2c_get_clientdata(client);
+ int ret = 0;
+ int i;
+
+ /* make sure no workqueue entries are pending */
+ for (i = 0; i < 3; i++)
+ led_classdev_unregister(&data->blinkm_leds[i].led_cdev);
+
+ /* reset rgb */
+ data->next_red = 0x00;
+ data->next_green = 0x00;
+ data->next_blue = 0x00;
+ ret = blinkm_transfer_hw(client, BLM_FADE_RGB);
+ if (ret < 0)
+ dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n");
+
+ /* reset hsb */
+ data->next_hue = 0x00;
+ data->next_saturation = 0x00;
+ data->next_brightness = 0x00;
+ ret = blinkm_transfer_hw(client, BLM_FADE_HSB);
+ if (ret < 0)
+ dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n");
+
+ /* red fade to off */
+ data->next_red = 0xff;
+ ret = blinkm_transfer_hw(client, BLM_GO_RGB);
+ if (ret < 0)
+ dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n");
+
+ /* off */
+ data->next_red = 0x00;
+ ret = blinkm_transfer_hw(client, BLM_FADE_RGB);
+ if (ret < 0)
+ dev_err(&client->dev, "Failure in blinkm_remove ignored. Continuing.\n");
+
+ sysfs_remove_group(&client->dev.kobj, &blinkm_group);
+}
+
+static const struct i2c_device_id blinkm_id[] = {
+ {"blinkm", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, blinkm_id);
+
+ /* This is the driver that will be inserted */
+static struct i2c_driver blinkm_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "blinkm",
+ },
+ .probe = blinkm_probe,
+ .remove = blinkm_remove,
+ .id_table = blinkm_id,
+ .detect = blinkm_detect,
+ .address_list = normal_i2c,
+};
+
+module_i2c_driver(blinkm_driver);
+
+MODULE_AUTHOR("Jan-Simon Moeller <dl9pf@gmx.de>");
+MODULE_DESCRIPTION("BlinkM RGB LED driver");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/leds/leds-clevo-mail.c b/drivers/leds/leds-clevo-mail.c
new file mode 100644
index 000000000..f512e99b9
--- /dev/null
+++ b/drivers/leds/leds-clevo-mail.c
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/leds.h>
+
+#include <linux/io.h>
+#include <linux/dmi.h>
+
+#include <linux/i8042.h>
+
+#define CLEVO_MAIL_LED_OFF 0x0084
+#define CLEVO_MAIL_LED_BLINK_1HZ 0x008A
+#define CLEVO_MAIL_LED_BLINK_0_5HZ 0x0083
+
+MODULE_AUTHOR("Márton Németh <nm127@freemail.hu>");
+MODULE_DESCRIPTION("Clevo mail LED driver");
+MODULE_LICENSE("GPL");
+
+static bool nodetect;
+module_param_named(nodetect, nodetect, bool, 0);
+MODULE_PARM_DESC(nodetect, "Skip DMI hardware detection");
+
+static struct platform_device *pdev;
+
+static int __init clevo_mail_led_dmi_callback(const struct dmi_system_id *id)
+{
+ pr_info("'%s' found\n", id->ident);
+ return 1;
+}
+
+/*
+ * struct clevo_mail_led_dmi_table - List of known good models
+ *
+ * Contains the known good models this driver is compatible with.
+ * When adding a new model try to be as strict as possible. This
+ * makes it possible to keep the false positives (the model is
+ * detected as working, but in reality it is not) as low as
+ * possible.
+ */
+static const struct dmi_system_id clevo_mail_led_dmi_table[] __initconst = {
+ {
+ .callback = clevo_mail_led_dmi_callback,
+ .ident = "Clevo D410J",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "VIA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "K8N800"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "VT8204B")
+ }
+ },
+ {
+ .callback = clevo_mail_led_dmi_callback,
+ .ident = "Clevo M5x0N",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "M5x0N")
+ }
+ },
+ {
+ .callback = clevo_mail_led_dmi_callback,
+ .ident = "Clevo M5x0V",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "CLEVO Co. "),
+ DMI_MATCH(DMI_BOARD_NAME, "M5X0V "),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "VT6198")
+ }
+ },
+ {
+ .callback = clevo_mail_led_dmi_callback,
+ .ident = "Clevo D400P",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Clevo"),
+ DMI_MATCH(DMI_BOARD_NAME, "D400P"),
+ DMI_MATCH(DMI_BOARD_VERSION, "Rev.A"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "0106")
+ }
+ },
+ {
+ .callback = clevo_mail_led_dmi_callback,
+ .ident = "Clevo D410V",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Clevo, Co."),
+ DMI_MATCH(DMI_BOARD_NAME, "D400V/D470V"),
+ DMI_MATCH(DMI_BOARD_VERSION, "SS78B"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "Rev. A1")
+ }
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(dmi, clevo_mail_led_dmi_table);
+
+static void clevo_mail_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ i8042_lock_chip();
+
+ if (value == LED_OFF)
+ i8042_command(NULL, CLEVO_MAIL_LED_OFF);
+ else if (value <= LED_HALF)
+ i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
+ else
+ i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
+
+ i8042_unlock_chip();
+
+}
+
+static int clevo_mail_led_blink(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ int status = -EINVAL;
+
+ i8042_lock_chip();
+
+ if (*delay_on == 0 /* ms */ && *delay_off == 0 /* ms */) {
+ /* Special case: the leds subsystem requested us to
+ * chose one user friendly blinking of the LED, and
+ * start it. Let's blink the led slowly (0.5Hz).
+ */
+ *delay_on = 1000; /* ms */
+ *delay_off = 1000; /* ms */
+ i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
+ status = 0;
+
+ } else if (*delay_on == 500 /* ms */ && *delay_off == 500 /* ms */) {
+ /* blink the led with 1Hz */
+ i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
+ status = 0;
+
+ } else if (*delay_on == 1000 /* ms */ && *delay_off == 1000 /* ms */) {
+ /* blink the led with 0.5Hz */
+ i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
+ status = 0;
+
+ } else {
+ pr_debug("clevo_mail_led_blink(..., %lu, %lu),"
+ " returning -EINVAL (unsupported)\n",
+ *delay_on, *delay_off);
+ }
+
+ i8042_unlock_chip();
+
+ return status;
+}
+
+static struct led_classdev clevo_mail_led = {
+ .name = "clevo::mail",
+ .brightness_set = clevo_mail_led_set,
+ .blink_set = clevo_mail_led_blink,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static int __init clevo_mail_led_probe(struct platform_device *pdev)
+{
+ return led_classdev_register(&pdev->dev, &clevo_mail_led);
+}
+
+static int clevo_mail_led_remove(struct platform_device *pdev)
+{
+ led_classdev_unregister(&clevo_mail_led);
+ return 0;
+}
+
+static struct platform_driver clevo_mail_led_driver = {
+ .remove = clevo_mail_led_remove,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ },
+};
+
+static int __init clevo_mail_led_init(void)
+{
+ int error = 0;
+ int count = 0;
+
+ /* Check with the help of DMI if we are running on supported hardware */
+ if (!nodetect) {
+ count = dmi_check_system(clevo_mail_led_dmi_table);
+ } else {
+ count = 1;
+ pr_err("Skipping DMI detection. "
+ "If the driver works on your hardware please "
+ "report model and the output of dmidecode in tracker "
+ "at http://sourceforge.net/projects/clevo-mailled/\n");
+ }
+
+ if (!count)
+ return -ENODEV;
+
+ pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
+ if (!IS_ERR(pdev)) {
+ error = platform_driver_probe(&clevo_mail_led_driver,
+ clevo_mail_led_probe);
+ if (error) {
+ pr_err("Can't probe platform driver\n");
+ platform_device_unregister(pdev);
+ }
+ } else
+ error = PTR_ERR(pdev);
+
+ return error;
+}
+
+static void __exit clevo_mail_led_exit(void)
+{
+ platform_device_unregister(pdev);
+ platform_driver_unregister(&clevo_mail_led_driver);
+
+ clevo_mail_led_set(NULL, LED_OFF);
+}
+
+module_init(clevo_mail_led_init);
+module_exit(clevo_mail_led_exit);
diff --git a/drivers/leds/leds-cobalt-qube.c b/drivers/leds/leds-cobalt-qube.c
new file mode 100644
index 000000000..ef22e1e94
--- /dev/null
+++ b/drivers/leds/leds-cobalt-qube.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2006 - Florian Fainelli <florian@openwrt.org>
+ *
+ * Control the Cobalt Qube/RaQ front LED
+ */
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+
+#define LED_FRONT_LEFT 0x01
+#define LED_FRONT_RIGHT 0x02
+
+static void __iomem *led_port;
+static u8 led_value;
+
+static void qube_front_led_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ if (brightness)
+ led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
+ else
+ led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT);
+ writeb(led_value, led_port);
+}
+
+static struct led_classdev qube_front_led = {
+ .name = "qube::front",
+ .brightness = LED_FULL,
+ .brightness_set = qube_front_led_set,
+ .default_trigger = "default-on",
+};
+
+static int cobalt_qube_led_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EBUSY;
+
+ led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ if (!led_port)
+ return -ENOMEM;
+
+ led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
+ writeb(led_value, led_port);
+
+ return devm_led_classdev_register(&pdev->dev, &qube_front_led);
+}
+
+static struct platform_driver cobalt_qube_led_driver = {
+ .probe = cobalt_qube_led_probe,
+ .driver = {
+ .name = "cobalt-qube-leds",
+ },
+};
+
+module_platform_driver(cobalt_qube_led_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Front LED support for Cobalt Server");
+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
+MODULE_ALIAS("platform:cobalt-qube-leds");
diff --git a/drivers/leds/leds-cobalt-raq.c b/drivers/leds/leds-cobalt-raq.c
new file mode 100644
index 000000000..045c239c7
--- /dev/null
+++ b/drivers/leds/leds-cobalt-raq.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * LEDs driver for the Cobalt Raq series.
+ *
+ * Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/export.h>
+
+#define LED_WEB 0x04
+#define LED_POWER_OFF 0x08
+
+static void __iomem *led_port;
+static u8 led_value;
+static DEFINE_SPINLOCK(led_value_lock);
+
+static void raq_web_led_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&led_value_lock, flags);
+
+ if (brightness)
+ led_value |= LED_WEB;
+ else
+ led_value &= ~LED_WEB;
+ writeb(led_value, led_port);
+
+ spin_unlock_irqrestore(&led_value_lock, flags);
+}
+
+static struct led_classdev raq_web_led = {
+ .name = "raq::web",
+ .brightness_set = raq_web_led_set,
+};
+
+static void raq_power_off_led_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&led_value_lock, flags);
+
+ if (brightness)
+ led_value |= LED_POWER_OFF;
+ else
+ led_value &= ~LED_POWER_OFF;
+ writeb(led_value, led_port);
+
+ spin_unlock_irqrestore(&led_value_lock, flags);
+}
+
+static struct led_classdev raq_power_off_led = {
+ .name = "raq::power-off",
+ .brightness_set = raq_power_off_led_set,
+ .default_trigger = "power-off",
+};
+
+static int cobalt_raq_led_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ int retval;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EBUSY;
+
+ led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ if (!led_port)
+ return -ENOMEM;
+
+ retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
+ if (retval)
+ goto err_null;
+
+ retval = led_classdev_register(&pdev->dev, &raq_web_led);
+ if (retval)
+ goto err_unregister;
+
+ return 0;
+
+err_unregister:
+ led_classdev_unregister(&raq_power_off_led);
+
+err_null:
+ led_port = NULL;
+
+ return retval;
+}
+
+static struct platform_driver cobalt_raq_led_driver = {
+ .probe = cobalt_raq_led_probe,
+ .driver = {
+ .name = "cobalt-raq-leds",
+ },
+};
+
+builtin_platform_driver(cobalt_raq_led_driver);
diff --git a/drivers/leds/leds-cpcap.c b/drivers/leds/leds-cpcap.c
new file mode 100644
index 000000000..7d41ce8c9
--- /dev/null
+++ b/drivers/leds/leds-cpcap.c
@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2017 Sebastian Reichel <sre@kernel.org>
+ */
+
+#include <linux/leds.h>
+#include <linux/mfd/motorola-cpcap.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#define CPCAP_LED_NO_CURRENT 0x0001
+
+struct cpcap_led_info {
+ u16 reg;
+ u16 mask;
+ u16 limit;
+ u16 init_mask;
+ u16 init_val;
+};
+
+static const struct cpcap_led_info cpcap_led_red = {
+ .reg = CPCAP_REG_REDC,
+ .mask = 0x03FF,
+ .limit = 31,
+};
+
+static const struct cpcap_led_info cpcap_led_green = {
+ .reg = CPCAP_REG_GREENC,
+ .mask = 0x03FF,
+ .limit = 31,
+};
+
+static const struct cpcap_led_info cpcap_led_blue = {
+ .reg = CPCAP_REG_BLUEC,
+ .mask = 0x03FF,
+ .limit = 31,
+};
+
+/* aux display light */
+static const struct cpcap_led_info cpcap_led_adl = {
+ .reg = CPCAP_REG_ADLC,
+ .mask = 0x000F,
+ .limit = 1,
+ .init_mask = 0x7FFF,
+ .init_val = 0x5FF0,
+};
+
+/* camera privacy led */
+static const struct cpcap_led_info cpcap_led_cp = {
+ .reg = CPCAP_REG_CLEDC,
+ .mask = 0x0007,
+ .limit = 1,
+ .init_mask = 0x03FF,
+ .init_val = 0x0008,
+};
+
+struct cpcap_led {
+ struct led_classdev led;
+ const struct cpcap_led_info *info;
+ struct device *dev;
+ struct regmap *regmap;
+ struct mutex update_lock;
+ struct regulator *vdd;
+ bool powered;
+
+ u32 current_limit;
+};
+
+static u16 cpcap_led_val(u8 current_limit, u8 duty_cycle)
+{
+ current_limit &= 0x1f; /* 5 bit */
+ duty_cycle &= 0x0f; /* 4 bit */
+
+ return current_limit << 4 | duty_cycle;
+}
+
+static int cpcap_led_set_power(struct cpcap_led *led, bool status)
+{
+ int err;
+
+ if (status == led->powered)
+ return 0;
+
+ if (status)
+ err = regulator_enable(led->vdd);
+ else
+ err = regulator_disable(led->vdd);
+
+ if (err) {
+ dev_err(led->dev, "regulator failure: %d", err);
+ return err;
+ }
+
+ led->powered = status;
+
+ return 0;
+}
+
+static int cpcap_led_set(struct led_classdev *ledc, enum led_brightness value)
+{
+ struct cpcap_led *led = container_of(ledc, struct cpcap_led, led);
+ int brightness;
+ int err;
+
+ mutex_lock(&led->update_lock);
+
+ if (value > LED_OFF) {
+ err = cpcap_led_set_power(led, true);
+ if (err)
+ goto exit;
+ }
+
+ if (value == LED_OFF) {
+ /* Avoid HW issue by turning off current before duty cycle */
+ err = regmap_update_bits(led->regmap,
+ led->info->reg, led->info->mask, CPCAP_LED_NO_CURRENT);
+ if (err) {
+ dev_err(led->dev, "regmap failed: %d", err);
+ goto exit;
+ }
+
+ brightness = cpcap_led_val(value, LED_OFF);
+ } else {
+ brightness = cpcap_led_val(value, LED_ON);
+ }
+
+ err = regmap_update_bits(led->regmap, led->info->reg, led->info->mask,
+ brightness);
+ if (err) {
+ dev_err(led->dev, "regmap failed: %d", err);
+ goto exit;
+ }
+
+ if (value == LED_OFF) {
+ err = cpcap_led_set_power(led, false);
+ if (err)
+ goto exit;
+ }
+
+exit:
+ mutex_unlock(&led->update_lock);
+ return err;
+}
+
+static const struct of_device_id cpcap_led_of_match[] = {
+ { .compatible = "motorola,cpcap-led-red", .data = &cpcap_led_red },
+ { .compatible = "motorola,cpcap-led-green", .data = &cpcap_led_green },
+ { .compatible = "motorola,cpcap-led-blue", .data = &cpcap_led_blue },
+ { .compatible = "motorola,cpcap-led-adl", .data = &cpcap_led_adl },
+ { .compatible = "motorola,cpcap-led-cp", .data = &cpcap_led_cp },
+ {},
+};
+MODULE_DEVICE_TABLE(of, cpcap_led_of_match);
+
+static int cpcap_led_probe(struct platform_device *pdev)
+{
+ struct cpcap_led *led;
+ int err;
+
+ led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, led);
+ led->info = device_get_match_data(&pdev->dev);
+ led->dev = &pdev->dev;
+
+ if (led->info->reg == 0x0000) {
+ dev_err(led->dev, "Unsupported LED");
+ return -ENODEV;
+ }
+
+ led->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!led->regmap)
+ return -ENODEV;
+
+ led->vdd = devm_regulator_get(&pdev->dev, "vdd");
+ if (IS_ERR(led->vdd)) {
+ err = PTR_ERR(led->vdd);
+ dev_err(led->dev, "Couldn't get regulator: %d", err);
+ return err;
+ }
+
+ err = device_property_read_string(&pdev->dev, "label", &led->led.name);
+ if (err) {
+ dev_err(led->dev, "Couldn't read LED label: %d", err);
+ return err;
+ }
+
+ if (led->info->init_mask) {
+ err = regmap_update_bits(led->regmap, led->info->reg,
+ led->info->init_mask, led->info->init_val);
+ if (err) {
+ dev_err(led->dev, "regmap failed: %d", err);
+ return err;
+ }
+ }
+
+ mutex_init(&led->update_lock);
+
+ led->led.max_brightness = led->info->limit;
+ led->led.brightness_set_blocking = cpcap_led_set;
+ err = devm_led_classdev_register(&pdev->dev, &led->led);
+ if (err) {
+ dev_err(led->dev, "Couldn't register LED: %d", err);
+ return err;
+ }
+
+ return 0;
+}
+
+static struct platform_driver cpcap_led_driver = {
+ .probe = cpcap_led_probe,
+ .driver = {
+ .name = "cpcap-led",
+ .of_match_table = cpcap_led_of_match,
+ },
+};
+module_platform_driver(cpcap_led_driver);
+
+MODULE_DESCRIPTION("CPCAP LED driver");
+MODULE_AUTHOR("Sebastian Reichel <sre@kernel.org>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-cr0014114.c b/drivers/leds/leds-cr0014114.c
new file mode 100644
index 000000000..c87686bd7
--- /dev/null
+++ b/drivers/leds/leds-cr0014114.c
@@ -0,0 +1,298 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2018 Crane Merchandising Systems. All rights reserved.
+// Copyright (C) 2018 Oleh Kravchenko <oleg@kaa.org.ua>
+
+#include <linux/delay.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/spi/spi.h>
+#include <linux/workqueue.h>
+
+/*
+ * CR0014114 SPI protocol descrtiption:
+ * +----+-----------------------------------+----+
+ * | CMD| BRIGHTNESS |CRC |
+ * +----+-----------------------------------+----+
+ * | | LED0| LED1| LED2| LED3| LED4| LED5| |
+ * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
+ * | |R|G|B|R|G|B|R|G|B|R|G|B|R|G|B|R|G|B| |
+ * | 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 1 |
+ * | |1|1|1|1|1|1|1|1|1|1|1|1|1|1|1|1|1|1| |
+ * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
+ * | | 18 | |
+ * +----+-----------------------------------+----+
+ * | 20 |
+ * +---------------------------------------------+
+ *
+ * PS: Boards can be connected to the chain:
+ * SPI -> board0 -> board1 -> board2 ..
+ */
+
+/* CR0014114 SPI commands */
+#define CR_SET_BRIGHTNESS 0x80
+#define CR_INIT_REENUMERATE 0x81
+#define CR_NEXT_REENUMERATE 0x82
+
+/* CR0014114 default settings */
+#define CR_MAX_BRIGHTNESS GENMASK(6, 0)
+#define CR_FW_DELAY_MSEC 10
+#define CR_RECOUNT_DELAY (HZ * 3600)
+
+#define CR_DEV_NAME "cr0014114"
+
+struct cr0014114_led {
+ struct cr0014114 *priv;
+ struct led_classdev ldev;
+ u8 brightness;
+};
+
+struct cr0014114 {
+ bool do_recount;
+ size_t count;
+ struct delayed_work work;
+ struct device *dev;
+ struct mutex lock;
+ struct spi_device *spi;
+ u8 *buf;
+ unsigned long delay;
+ struct cr0014114_led leds[];
+};
+
+static void cr0014114_calc_crc(u8 *buf, const size_t len)
+{
+ size_t i;
+ u8 crc;
+
+ for (i = 1, crc = 1; i < len - 1; i++)
+ crc += buf[i];
+ crc |= BIT(7);
+
+ /* special case when CRC matches the SPI commands */
+ if (crc == CR_SET_BRIGHTNESS ||
+ crc == CR_INIT_REENUMERATE ||
+ crc == CR_NEXT_REENUMERATE)
+ crc = 0xfe;
+
+ buf[len - 1] = crc;
+}
+
+static int cr0014114_recount(struct cr0014114 *priv)
+{
+ int ret;
+ size_t i;
+ u8 cmd;
+
+ dev_dbg(priv->dev, "LEDs recount is started\n");
+
+ cmd = CR_INIT_REENUMERATE;
+ ret = spi_write(priv->spi, &cmd, sizeof(cmd));
+ if (ret)
+ goto err;
+
+ cmd = CR_NEXT_REENUMERATE;
+ for (i = 0; i < priv->count; i++) {
+ msleep(CR_FW_DELAY_MSEC);
+
+ ret = spi_write(priv->spi, &cmd, sizeof(cmd));
+ if (ret)
+ goto err;
+ }
+
+err:
+ dev_dbg(priv->dev, "LEDs recount is finished\n");
+
+ if (ret)
+ dev_err(priv->dev, "with error %d", ret);
+
+ return ret;
+}
+
+static int cr0014114_sync(struct cr0014114 *priv)
+{
+ int ret;
+ size_t i;
+ unsigned long udelay, now = jiffies;
+
+ /* to avoid SPI mistiming with firmware we should wait some time */
+ if (time_after(priv->delay, now)) {
+ udelay = jiffies_to_usecs(priv->delay - now);
+ usleep_range(udelay, udelay + 1);
+ }
+
+ if (unlikely(priv->do_recount)) {
+ ret = cr0014114_recount(priv);
+ if (ret)
+ goto err;
+
+ priv->do_recount = false;
+ msleep(CR_FW_DELAY_MSEC);
+ }
+
+ priv->buf[0] = CR_SET_BRIGHTNESS;
+ for (i = 0; i < priv->count; i++)
+ priv->buf[i + 1] = priv->leds[i].brightness;
+ cr0014114_calc_crc(priv->buf, priv->count + 2);
+ ret = spi_write(priv->spi, priv->buf, priv->count + 2);
+
+err:
+ priv->delay = jiffies + msecs_to_jiffies(CR_FW_DELAY_MSEC);
+
+ return ret;
+}
+
+static void cr0014114_recount_work(struct work_struct *work)
+{
+ int ret;
+ struct cr0014114 *priv = container_of(work,
+ struct cr0014114,
+ work.work);
+
+ mutex_lock(&priv->lock);
+ priv->do_recount = true;
+ ret = cr0014114_sync(priv);
+ mutex_unlock(&priv->lock);
+
+ if (ret)
+ dev_warn(priv->dev, "sync of LEDs failed %d\n", ret);
+
+ schedule_delayed_work(&priv->work, CR_RECOUNT_DELAY);
+}
+
+static int cr0014114_set_sync(struct led_classdev *ldev,
+ enum led_brightness brightness)
+{
+ int ret;
+ struct cr0014114_led *led = container_of(ldev,
+ struct cr0014114_led,
+ ldev);
+
+ dev_dbg(led->priv->dev, "Set brightness to %d\n", brightness);
+
+ mutex_lock(&led->priv->lock);
+ led->brightness = (u8)brightness;
+ ret = cr0014114_sync(led->priv);
+ mutex_unlock(&led->priv->lock);
+
+ return ret;
+}
+
+static int cr0014114_probe_dt(struct cr0014114 *priv)
+{
+ size_t i = 0;
+ struct cr0014114_led *led;
+ struct fwnode_handle *child;
+ struct led_init_data init_data = {};
+ int ret;
+
+ device_for_each_child_node(priv->dev, child) {
+ led = &priv->leds[i];
+
+ led->priv = priv;
+ led->ldev.max_brightness = CR_MAX_BRIGHTNESS;
+ led->ldev.brightness_set_blocking = cr0014114_set_sync;
+
+ init_data.fwnode = child;
+ init_data.devicename = CR_DEV_NAME;
+ init_data.default_label = ":";
+
+ ret = devm_led_classdev_register_ext(priv->dev, &led->ldev,
+ &init_data);
+ if (ret) {
+ dev_err(priv->dev,
+ "failed to register LED device, err %d", ret);
+ fwnode_handle_put(child);
+ return ret;
+ }
+
+ i++;
+ }
+
+ return 0;
+}
+
+static int cr0014114_probe(struct spi_device *spi)
+{
+ struct cr0014114 *priv;
+ size_t count;
+ int ret;
+
+ count = device_get_child_node_count(&spi->dev);
+ if (!count) {
+ dev_err(&spi->dev, "LEDs are not defined in device tree!");
+ return -ENODEV;
+ }
+
+ priv = devm_kzalloc(&spi->dev, struct_size(priv, leds, count),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->buf = devm_kzalloc(&spi->dev, count + 2, GFP_KERNEL);
+ if (!priv->buf)
+ return -ENOMEM;
+
+ mutex_init(&priv->lock);
+ INIT_DELAYED_WORK(&priv->work, cr0014114_recount_work);
+ priv->count = count;
+ priv->dev = &spi->dev;
+ priv->spi = spi;
+ priv->delay = jiffies -
+ msecs_to_jiffies(CR_FW_DELAY_MSEC);
+
+ priv->do_recount = true;
+ ret = cr0014114_sync(priv);
+ if (ret) {
+ dev_err(priv->dev, "first recount failed %d\n", ret);
+ return ret;
+ }
+
+ priv->do_recount = true;
+ ret = cr0014114_sync(priv);
+ if (ret) {
+ dev_err(priv->dev, "second recount failed %d\n", ret);
+ return ret;
+ }
+
+ ret = cr0014114_probe_dt(priv);
+ if (ret)
+ return ret;
+
+ /* setup recount work to workaround buggy firmware */
+ schedule_delayed_work(&priv->work, CR_RECOUNT_DELAY);
+
+ spi_set_drvdata(spi, priv);
+
+ return 0;
+}
+
+static void cr0014114_remove(struct spi_device *spi)
+{
+ struct cr0014114 *priv = spi_get_drvdata(spi);
+
+ cancel_delayed_work_sync(&priv->work);
+ mutex_destroy(&priv->lock);
+}
+
+static const struct of_device_id cr0014114_dt_ids[] = {
+ { .compatible = "crane,cr0014114", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, cr0014114_dt_ids);
+
+static struct spi_driver cr0014114_driver = {
+ .probe = cr0014114_probe,
+ .remove = cr0014114_remove,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .of_match_table = cr0014114_dt_ids,
+ },
+};
+
+module_spi_driver(cr0014114_driver);
+
+MODULE_AUTHOR("Oleh Kravchenko <oleg@kaa.org.ua>");
+MODULE_DESCRIPTION("cr0014114 LED driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:cr0014114");
diff --git a/drivers/leds/leds-da903x.c b/drivers/leds/leds-da903x.c
new file mode 100644
index 000000000..2b5fb0043
--- /dev/null
+++ b/drivers/leds/leds-da903x.c
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LEDs driver for Dialog Semiconductor DA9030/DA9034
+ *
+ * Copyright (C) 2008 Compulab, Ltd.
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ * Eric Miao <eric.miao@marvell.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/mfd/da903x.h>
+#include <linux/slab.h>
+
+#define DA9030_LED1_CONTROL 0x20
+#define DA9030_LED2_CONTROL 0x21
+#define DA9030_LED3_CONTROL 0x22
+#define DA9030_LED4_CONTROL 0x23
+#define DA9030_LEDPC_CONTROL 0x24
+#define DA9030_MISC_CONTROL_A 0x26 /* Vibrator Control */
+
+#define DA9034_LED1_CONTROL 0x35
+#define DA9034_LED2_CONTROL 0x36
+#define DA9034_VIBRA 0x40
+
+struct da903x_led {
+ struct led_classdev cdev;
+ struct device *master;
+ int id;
+ int flags;
+};
+
+#define DA9030_LED_OFFSET(id) ((id) - DA9030_ID_LED_1)
+#define DA9034_LED_OFFSET(id) ((id) - DA9034_ID_LED_1)
+
+static int da903x_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct da903x_led *led =
+ container_of(led_cdev, struct da903x_led, cdev);
+ uint8_t val;
+ int offset, ret = -EINVAL;
+
+ switch (led->id) {
+ case DA9030_ID_LED_1:
+ case DA9030_ID_LED_2:
+ case DA9030_ID_LED_3:
+ case DA9030_ID_LED_4:
+ case DA9030_ID_LED_PC:
+ offset = DA9030_LED_OFFSET(led->id);
+ val = led->flags & ~0x87;
+ val |= value ? 0x80 : 0; /* EN bit */
+ val |= (0x7 - (value >> 5)) & 0x7; /* PWM<2:0> */
+ ret = da903x_write(led->master, DA9030_LED1_CONTROL + offset,
+ val);
+ break;
+ case DA9030_ID_VIBRA:
+ val = led->flags & ~0x80;
+ val |= value ? 0x80 : 0; /* EN bit */
+ ret = da903x_write(led->master, DA9030_MISC_CONTROL_A, val);
+ break;
+ case DA9034_ID_LED_1:
+ case DA9034_ID_LED_2:
+ offset = DA9034_LED_OFFSET(led->id);
+ val = (value * 0x5f / LED_FULL) & 0x7f;
+ val |= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0;
+ ret = da903x_write(led->master, DA9034_LED1_CONTROL + offset,
+ val);
+ break;
+ case DA9034_ID_VIBRA:
+ val = value & 0xfe;
+ ret = da903x_write(led->master, DA9034_VIBRA, val);
+ break;
+ }
+
+ return ret;
+}
+
+static int da903x_led_probe(struct platform_device *pdev)
+{
+ struct led_info *pdata = dev_get_platdata(&pdev->dev);
+ struct da903x_led *led;
+ int id, ret;
+
+ if (pdata == NULL)
+ return 0;
+
+ id = pdev->id;
+
+ if (!((id >= DA9030_ID_LED_1 && id <= DA9030_ID_VIBRA) ||
+ (id >= DA9034_ID_LED_1 && id <= DA9034_ID_VIBRA))) {
+ dev_err(&pdev->dev, "invalid LED ID (%d) specified\n", id);
+ return -EINVAL;
+ }
+
+ led = devm_kzalloc(&pdev->dev, sizeof(struct da903x_led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->cdev.name = pdata->name;
+ led->cdev.default_trigger = pdata->default_trigger;
+ led->cdev.brightness_set_blocking = da903x_led_set;
+ led->cdev.brightness = LED_OFF;
+
+ led->id = id;
+ led->flags = pdata->flags;
+ led->master = pdev->dev.parent;
+
+ ret = led_classdev_register(led->master, &led->cdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register LED %d\n", id);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, led);
+
+ return 0;
+}
+
+static int da903x_led_remove(struct platform_device *pdev)
+{
+ struct da903x_led *led = platform_get_drvdata(pdev);
+
+ led_classdev_unregister(&led->cdev);
+
+ return 0;
+}
+
+static struct platform_driver da903x_led_driver = {
+ .driver = {
+ .name = "da903x-led",
+ },
+ .probe = da903x_led_probe,
+ .remove = da903x_led_remove,
+};
+
+module_platform_driver(da903x_led_driver);
+
+MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034");
+MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");
+MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da903x-led");
diff --git a/drivers/leds/leds-da9052.c b/drivers/leds/leds-da9052.c
new file mode 100644
index 000000000..04060c862
--- /dev/null
+++ b/drivers/leds/leds-da9052.c
@@ -0,0 +1,191 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * LED Driver for Dialog DA9052 PMICs.
+ *
+ * Copyright(c) 2012 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@diasemi.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/da9052/reg.h>
+#include <linux/mfd/da9052/da9052.h>
+#include <linux/mfd/da9052/pdata.h>
+
+#define DA9052_OPENDRAIN_OUTPUT 2
+#define DA9052_SET_HIGH_LVL_OUTPUT (1 << 3)
+#define DA9052_MASK_UPPER_NIBBLE 0xF0
+#define DA9052_MASK_LOWER_NIBBLE 0x0F
+#define DA9052_NIBBLE_SHIFT 4
+#define DA9052_MAX_BRIGHTNESS 0x5f
+
+struct da9052_led {
+ struct led_classdev cdev;
+ struct da9052 *da9052;
+ unsigned char led_index;
+ unsigned char id;
+};
+
+static unsigned char led_reg[] = {
+ DA9052_LED_CONT_4_REG,
+ DA9052_LED_CONT_5_REG,
+};
+
+static int da9052_set_led_brightness(struct da9052_led *led,
+ enum led_brightness brightness)
+{
+ u8 val;
+ int error;
+
+ val = (brightness & 0x7f) | DA9052_LED_CONT_DIM;
+
+ error = da9052_reg_write(led->da9052, led_reg[led->led_index], val);
+ if (error < 0)
+ dev_err(led->da9052->dev, "Failed to set led brightness, %d\n",
+ error);
+ return error;
+}
+
+static int da9052_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct da9052_led *led =
+ container_of(led_cdev, struct da9052_led, cdev);
+
+ return da9052_set_led_brightness(led, value);
+}
+
+static int da9052_configure_leds(struct da9052 *da9052)
+{
+ int error;
+ unsigned char register_value = DA9052_OPENDRAIN_OUTPUT
+ | DA9052_SET_HIGH_LVL_OUTPUT;
+
+ error = da9052_reg_update(da9052, DA9052_GPIO_14_15_REG,
+ DA9052_MASK_LOWER_NIBBLE,
+ register_value);
+
+ if (error < 0) {
+ dev_err(da9052->dev, "Failed to write GPIO 14-15 reg, %d\n",
+ error);
+ return error;
+ }
+
+ error = da9052_reg_update(da9052, DA9052_GPIO_14_15_REG,
+ DA9052_MASK_UPPER_NIBBLE,
+ register_value << DA9052_NIBBLE_SHIFT);
+ if (error < 0)
+ dev_err(da9052->dev, "Failed to write GPIO 14-15 reg, %d\n",
+ error);
+
+ return error;
+}
+
+static int da9052_led_probe(struct platform_device *pdev)
+{
+ struct da9052_pdata *pdata;
+ struct da9052 *da9052;
+ struct led_platform_data *pled;
+ struct da9052_led *led = NULL;
+ int error = -ENODEV;
+ int i;
+
+ da9052 = dev_get_drvdata(pdev->dev.parent);
+ pdata = dev_get_platdata(da9052->dev);
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "No platform data\n");
+ goto err;
+ }
+
+ pled = pdata->pled;
+ if (pled == NULL) {
+ dev_err(&pdev->dev, "No platform data for LED\n");
+ goto err;
+ }
+
+ led = devm_kcalloc(&pdev->dev,
+ pled->num_leds, sizeof(struct da9052_led),
+ GFP_KERNEL);
+ if (!led) {
+ error = -ENOMEM;
+ goto err;
+ }
+
+ for (i = 0; i < pled->num_leds; i++) {
+ led[i].cdev.name = pled->leds[i].name;
+ led[i].cdev.brightness_set_blocking = da9052_led_set;
+ led[i].cdev.brightness = LED_OFF;
+ led[i].cdev.max_brightness = DA9052_MAX_BRIGHTNESS;
+ led[i].led_index = pled->leds[i].flags;
+ led[i].da9052 = dev_get_drvdata(pdev->dev.parent);
+
+ error = led_classdev_register(pdev->dev.parent, &led[i].cdev);
+ if (error) {
+ dev_err(&pdev->dev, "Failed to register led %d\n",
+ led[i].led_index);
+ goto err_register;
+ }
+
+ error = da9052_set_led_brightness(&led[i],
+ led[i].cdev.brightness);
+ if (error) {
+ dev_err(&pdev->dev, "Unable to init led %d\n",
+ led[i].led_index);
+ continue;
+ }
+ }
+ error = da9052_configure_leds(led->da9052);
+ if (error) {
+ dev_err(&pdev->dev, "Failed to configure GPIO LED%d\n", error);
+ goto err_register;
+ }
+
+ platform_set_drvdata(pdev, led);
+
+ return 0;
+
+err_register:
+ for (i = i - 1; i >= 0; i--)
+ led_classdev_unregister(&led[i].cdev);
+err:
+ return error;
+}
+
+static int da9052_led_remove(struct platform_device *pdev)
+{
+ struct da9052_led *led = platform_get_drvdata(pdev);
+ struct da9052_pdata *pdata;
+ struct da9052 *da9052;
+ struct led_platform_data *pled;
+ int i;
+
+ da9052 = dev_get_drvdata(pdev->dev.parent);
+ pdata = dev_get_platdata(da9052->dev);
+ pled = pdata->pled;
+
+ for (i = 0; i < pled->num_leds; i++) {
+ da9052_set_led_brightness(&led[i], LED_OFF);
+ led_classdev_unregister(&led[i].cdev);
+ }
+
+ return 0;
+}
+
+static struct platform_driver da9052_led_driver = {
+ .driver = {
+ .name = "da9052-leds",
+ },
+ .probe = da9052_led_probe,
+ .remove = da9052_led_remove,
+};
+
+module_platform_driver(da9052_led_driver);
+
+MODULE_AUTHOR("Dialog Semiconductor Ltd <dchen@diasemi.com>");
+MODULE_DESCRIPTION("LED driver for Dialog DA9052 PMIC");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-dac124s085.c b/drivers/leds/leds-dac124s085.c
new file mode 100644
index 000000000..cf5fb1195
--- /dev/null
+++ b/drivers/leds/leds-dac124s085.c
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2008
+ * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
+ *
+ * LED driver for the DAC124S085 SPI DAC
+ */
+
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+
+struct dac124s085_led {
+ struct led_classdev ldev;
+ struct spi_device *spi;
+ int id;
+ char name[sizeof("dac124s085-3")];
+
+ struct mutex mutex;
+};
+
+struct dac124s085 {
+ struct dac124s085_led leds[4];
+};
+
+#define REG_WRITE (0 << 12)
+#define REG_WRITE_UPDATE (1 << 12)
+#define ALL_WRITE_UPDATE (2 << 12)
+#define POWER_DOWN_OUTPUT (3 << 12)
+
+static int dac124s085_set_brightness(struct led_classdev *ldev,
+ enum led_brightness brightness)
+{
+ struct dac124s085_led *led = container_of(ldev, struct dac124s085_led,
+ ldev);
+ u16 word;
+ int ret;
+
+ mutex_lock(&led->mutex);
+ word = cpu_to_le16(((led->id) << 14) | REG_WRITE_UPDATE |
+ (brightness & 0xfff));
+ ret = spi_write(led->spi, (const u8 *)&word, sizeof(word));
+ mutex_unlock(&led->mutex);
+
+ return ret;
+}
+
+static int dac124s085_probe(struct spi_device *spi)
+{
+ struct dac124s085 *dac;
+ struct dac124s085_led *led;
+ int i, ret;
+
+ dac = devm_kzalloc(&spi->dev, sizeof(*dac), GFP_KERNEL);
+ if (!dac)
+ return -ENOMEM;
+
+ spi->bits_per_word = 16;
+
+ for (i = 0; i < ARRAY_SIZE(dac->leds); i++) {
+ led = dac->leds + i;
+ led->id = i;
+ led->spi = spi;
+ snprintf(led->name, sizeof(led->name), "dac124s085-%d", i);
+ mutex_init(&led->mutex);
+ led->ldev.name = led->name;
+ led->ldev.brightness = LED_OFF;
+ led->ldev.max_brightness = 0xfff;
+ led->ldev.brightness_set_blocking = dac124s085_set_brightness;
+ ret = led_classdev_register(&spi->dev, &led->ldev);
+ if (ret < 0)
+ goto eledcr;
+ }
+
+ spi_set_drvdata(spi, dac);
+
+ return 0;
+
+eledcr:
+ while (i--)
+ led_classdev_unregister(&dac->leds[i].ldev);
+
+ return ret;
+}
+
+static void dac124s085_remove(struct spi_device *spi)
+{
+ struct dac124s085 *dac = spi_get_drvdata(spi);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(dac->leds); i++)
+ led_classdev_unregister(&dac->leds[i].ldev);
+}
+
+static struct spi_driver dac124s085_driver = {
+ .probe = dac124s085_probe,
+ .remove = dac124s085_remove,
+ .driver = {
+ .name = "dac124s085",
+ },
+};
+
+module_spi_driver(dac124s085_driver);
+
+MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
+MODULE_DESCRIPTION("DAC124S085 LED driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:dac124s085");
diff --git a/drivers/leds/leds-el15203000.c b/drivers/leds/leds-el15203000.c
new file mode 100644
index 000000000..7e7b617bc
--- /dev/null
+++ b/drivers/leds/leds-el15203000.c
@@ -0,0 +1,346 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2019 Crane Merchandising Systems. All rights reserved.
+// Copyright (C) 2019 Oleh Kravchenko <oleg@kaa.org.ua>
+
+#include <linux/delay.h>
+#include <linux/leds.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+
+/*
+ * EL15203000 SPI protocol description:
+ * +-----+---------+
+ * | LED | COMMAND |
+ * +-----+---------+
+ * | 1 | 1 |
+ * +-----+---------+
+ * (*) LEDs MCU board expects 20 msec delay per byte.
+ *
+ * LEDs:
+ * +----------+--------------+-------------------------------------------+
+ * | ID | NAME | DESCRIPTION |
+ * +----------+--------------+-------------------------------------------+
+ * | 'P' 0x50 | Pipe | Consists from 5 LEDs, controlled by board |
+ * +----------+--------------+-------------------------------------------+
+ * | 'S' 0x53 | Screen frame | Light tube around the screen |
+ * +----------+--------------+-------------------------------------------+
+ * | 'V' 0x56 | Vending area | Highlights a cup of coffee |
+ * +----------+--------------+-------------------------------------------+
+ *
+ * COMMAND:
+ * +----------+-----------------+--------------+--------------+
+ * | VALUES | PIPE | SCREEN FRAME | VENDING AREA |
+ * +----------+-----------------+--------------+--------------+
+ * | '0' 0x30 | Off |
+ * +----------+-----------------------------------------------+
+ * | '1' 0x31 | On |
+ * +----------+-----------------+--------------+--------------+
+ * | '2' 0x32 | Cascade | Breathing |
+ * +----------+-----------------+--------------+
+ * | '3' 0x33 | Inverse cascade |
+ * +----------+-----------------+
+ * | '4' 0x34 | Bounce |
+ * +----------+-----------------+
+ * | '5' 0x35 | Inverse bounce |
+ * +----------+-----------------+
+ */
+
+/* EL15203000 default settings */
+#define EL_FW_DELAY_USEC 20000ul
+#define EL_PATTERN_DELAY_MSEC 800u
+#define EL_PATTERN_LEN 10u
+#define EL_PATTERN_HALF_LEN (EL_PATTERN_LEN / 2)
+
+enum el15203000_command {
+ /* for all LEDs */
+ EL_OFF = '0',
+ EL_ON = '1',
+
+ /* for Screen LED */
+ EL_SCREEN_BREATHING = '2',
+
+ /* for Pipe LED */
+ EL_PIPE_CASCADE = '2',
+ EL_PIPE_INV_CASCADE = '3',
+ EL_PIPE_BOUNCE = '4',
+ EL_PIPE_INV_BOUNCE = '5',
+};
+
+struct el15203000_led {
+ struct led_classdev ldev;
+ struct el15203000 *priv;
+ u32 reg;
+};
+
+struct el15203000 {
+ struct device *dev;
+ struct mutex lock;
+ struct spi_device *spi;
+ unsigned long delay;
+ size_t count;
+ struct el15203000_led leds[];
+};
+
+#define to_el15203000_led(d) container_of(d, struct el15203000_led, ldev)
+
+static int el15203000_cmd(struct el15203000_led *led, u8 brightness)
+{
+ int ret;
+ u8 cmd[2];
+ size_t i;
+
+ mutex_lock(&led->priv->lock);
+
+ dev_dbg(led->priv->dev, "Set brightness of 0x%02x(%c) to 0x%02x(%c)",
+ led->reg, led->reg, brightness, brightness);
+
+ /* to avoid SPI mistiming with firmware we should wait some time */
+ if (time_after(led->priv->delay, jiffies)) {
+ dev_dbg(led->priv->dev, "Wait %luus to sync",
+ EL_FW_DELAY_USEC);
+
+ usleep_range(EL_FW_DELAY_USEC,
+ EL_FW_DELAY_USEC + 1);
+ }
+
+ cmd[0] = led->reg;
+ cmd[1] = brightness;
+
+ for (i = 0; i < ARRAY_SIZE(cmd); i++) {
+ if (i)
+ usleep_range(EL_FW_DELAY_USEC,
+ EL_FW_DELAY_USEC + 1);
+
+ ret = spi_write(led->priv->spi, &cmd[i], sizeof(cmd[i]));
+ if (ret) {
+ dev_err(led->priv->dev,
+ "spi_write() error %d", ret);
+ break;
+ }
+ }
+
+ led->priv->delay = jiffies + usecs_to_jiffies(EL_FW_DELAY_USEC);
+
+ mutex_unlock(&led->priv->lock);
+
+ return ret;
+}
+
+static int el15203000_set_blocking(struct led_classdev *ldev,
+ enum led_brightness brightness)
+{
+ struct el15203000_led *led = to_el15203000_led(ldev);
+
+ return el15203000_cmd(led, brightness == LED_OFF ? EL_OFF : EL_ON);
+}
+
+static int el15203000_pattern_set_S(struct led_classdev *ldev,
+ struct led_pattern *pattern,
+ u32 len, int repeat)
+{
+ struct el15203000_led *led = to_el15203000_led(ldev);
+
+ if (repeat > 0 || len != 2 ||
+ pattern[0].delta_t != 4000 || pattern[0].brightness != 0 ||
+ pattern[1].delta_t != 4000 || pattern[1].brightness != 1)
+ return -EINVAL;
+
+ dev_dbg(led->priv->dev, "Breathing mode for 0x%02x(%c)",
+ led->reg, led->reg);
+
+ return el15203000_cmd(led, EL_SCREEN_BREATHING);
+}
+
+static bool is_cascade(const struct led_pattern *pattern, u32 len,
+ bool inv, bool right)
+{
+ int val, t;
+ u32 i;
+
+ if (len != EL_PATTERN_HALF_LEN)
+ return false;
+
+ val = right ? BIT(4) : BIT(0);
+
+ for (i = 0; i < len; i++) {
+ t = inv ? ~val & GENMASK(4, 0) : val;
+
+ if (pattern[i].delta_t != EL_PATTERN_DELAY_MSEC ||
+ pattern[i].brightness != t)
+ return false;
+
+ val = right ? val >> 1 : val << 1;
+ }
+
+ return true;
+}
+
+static bool is_bounce(const struct led_pattern *pattern, u32 len, bool inv)
+{
+ if (len != EL_PATTERN_LEN)
+ return false;
+
+ return is_cascade(pattern, EL_PATTERN_HALF_LEN, inv, false) &&
+ is_cascade(pattern + EL_PATTERN_HALF_LEN,
+ EL_PATTERN_HALF_LEN, inv, true);
+}
+
+static int el15203000_pattern_set_P(struct led_classdev *ldev,
+ struct led_pattern *pattern,
+ u32 len, int repeat)
+{
+ struct el15203000_led *led = to_el15203000_led(ldev);
+ u8 cmd;
+
+ if (repeat > 0)
+ return -EINVAL;
+
+ if (is_cascade(pattern, len, false, false)) {
+ dev_dbg(led->priv->dev, "Cascade mode for 0x%02x(%c)",
+ led->reg, led->reg);
+
+ cmd = EL_PIPE_CASCADE;
+ } else if (is_cascade(pattern, len, true, false)) {
+ dev_dbg(led->priv->dev, "Inverse cascade mode for 0x%02x(%c)",
+ led->reg, led->reg);
+
+ cmd = EL_PIPE_INV_CASCADE;
+ } else if (is_bounce(pattern, len, false)) {
+ dev_dbg(led->priv->dev, "Bounce mode for 0x%02x(%c)",
+ led->reg, led->reg);
+
+ cmd = EL_PIPE_BOUNCE;
+ } else if (is_bounce(pattern, len, true)) {
+ dev_dbg(led->priv->dev, "Inverse bounce mode for 0x%02x(%c)",
+ led->reg, led->reg);
+
+ cmd = EL_PIPE_INV_BOUNCE;
+ } else {
+ dev_err(led->priv->dev, "Invalid hw_pattern for 0x%02x(%c)!",
+ led->reg, led->reg);
+
+ return -EINVAL;
+ }
+
+ return el15203000_cmd(led, cmd);
+}
+
+static int el15203000_pattern_clear(struct led_classdev *ldev)
+{
+ struct el15203000_led *led = to_el15203000_led(ldev);
+
+ return el15203000_cmd(led, EL_OFF);
+}
+
+static int el15203000_probe_dt(struct el15203000 *priv)
+{
+ struct el15203000_led *led = priv->leds;
+ struct fwnode_handle *child;
+ int ret;
+
+ device_for_each_child_node(priv->dev, child) {
+ struct led_init_data init_data = {};
+
+ ret = fwnode_property_read_u32(child, "reg", &led->reg);
+ if (ret) {
+ dev_err(priv->dev, "LED without ID number");
+ goto err_child_out;
+ }
+
+ if (led->reg > U8_MAX) {
+ dev_err(priv->dev, "LED value %d is invalid", led->reg);
+ ret = -EINVAL;
+ goto err_child_out;
+ }
+
+ led->priv = priv;
+ led->ldev.max_brightness = LED_ON;
+ led->ldev.brightness_set_blocking = el15203000_set_blocking;
+
+ if (led->reg == 'S') {
+ led->ldev.pattern_set = el15203000_pattern_set_S;
+ led->ldev.pattern_clear = el15203000_pattern_clear;
+ } else if (led->reg == 'P') {
+ led->ldev.pattern_set = el15203000_pattern_set_P;
+ led->ldev.pattern_clear = el15203000_pattern_clear;
+ }
+
+ init_data.fwnode = child;
+ ret = devm_led_classdev_register_ext(priv->dev, &led->ldev,
+ &init_data);
+ if (ret) {
+ dev_err(priv->dev,
+ "failed to register LED device %s, err %d",
+ led->ldev.name, ret);
+ goto err_child_out;
+ }
+
+ led++;
+ }
+
+ return 0;
+
+err_child_out:
+ fwnode_handle_put(child);
+ return ret;
+}
+
+static int el15203000_probe(struct spi_device *spi)
+{
+ struct el15203000 *priv;
+ size_t count;
+
+ count = device_get_child_node_count(&spi->dev);
+ if (!count) {
+ dev_err(&spi->dev, "LEDs are not defined in device tree!");
+ return -ENODEV;
+ }
+
+ priv = devm_kzalloc(&spi->dev, struct_size(priv, leds, count),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ mutex_init(&priv->lock);
+ priv->count = count;
+ priv->dev = &spi->dev;
+ priv->spi = spi;
+ priv->delay = jiffies -
+ usecs_to_jiffies(EL_FW_DELAY_USEC);
+
+ spi_set_drvdata(spi, priv);
+
+ return el15203000_probe_dt(priv);
+}
+
+static void el15203000_remove(struct spi_device *spi)
+{
+ struct el15203000 *priv = spi_get_drvdata(spi);
+
+ mutex_destroy(&priv->lock);
+}
+
+static const struct of_device_id el15203000_dt_ids[] = {
+ { .compatible = "crane,el15203000", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, el15203000_dt_ids);
+
+static struct spi_driver el15203000_driver = {
+ .probe = el15203000_probe,
+ .remove = el15203000_remove,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .of_match_table = el15203000_dt_ids,
+ },
+};
+
+module_spi_driver(el15203000_driver);
+
+MODULE_AUTHOR("Oleh Kravchenko <oleg@kaa.org.ua>");
+MODULE_DESCRIPTION("el15203000 LED driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:el15203000");
diff --git a/drivers/leds/leds-gpio-register.c b/drivers/leds/leds-gpio-register.c
new file mode 100644
index 000000000..de3f12c2b
--- /dev/null
+++ b/drivers/leds/leds-gpio-register.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2011 Pengutronix
+ * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
+ */
+#include <linux/err.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+/**
+ * gpio_led_register_device - register a gpio-led device
+ * @pdata: the platform data used for the new device
+ * @id: platform ID
+ *
+ * Makes a copy of pdata and pdata->leds and registers a new leds-gpio device
+ * with the result. This allows to have pdata and pdata-leds in .init.rodata
+ * and so saves some bytes compared to a static struct platform_device with
+ * static platform data.
+ *
+ * Returns the registered device or an error pointer.
+ */
+struct platform_device *__init gpio_led_register_device(
+ int id, const struct gpio_led_platform_data *pdata)
+{
+ struct platform_device *ret;
+ struct gpio_led_platform_data _pdata = *pdata;
+
+ if (!pdata->num_leds)
+ return ERR_PTR(-EINVAL);
+
+ _pdata.leds = kmemdup(pdata->leds,
+ pdata->num_leds * sizeof(*pdata->leds), GFP_KERNEL);
+ if (!_pdata.leds)
+ return ERR_PTR(-ENOMEM);
+
+ ret = platform_device_register_resndata(NULL, "leds-gpio", id,
+ NULL, 0, &_pdata, sizeof(_pdata));
+ if (IS_ERR(ret))
+ kfree(_pdata.leds);
+
+ return ret;
+}
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
new file mode 100644
index 000000000..092eb59a7
--- /dev/null
+++ b/drivers/leds/leds-gpio.c
@@ -0,0 +1,313 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LEDs driver for GPIOs
+ *
+ * Copyright (C) 2007 8D Technologies inc.
+ * Raphael Assenat <raph@8d.com>
+ * Copyright (C) 2008 Freescale Semiconductor, Inc.
+ */
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/slab.h>
+#include "leds.h"
+
+struct gpio_led_data {
+ struct led_classdev cdev;
+ struct gpio_desc *gpiod;
+ u8 can_sleep;
+ u8 blinking;
+ gpio_blink_set_t platform_gpio_blink_set;
+};
+
+static inline struct gpio_led_data *
+ cdev_to_gpio_led_data(struct led_classdev *led_cdev)
+{
+ return container_of(led_cdev, struct gpio_led_data, cdev);
+}
+
+static void gpio_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct gpio_led_data *led_dat = cdev_to_gpio_led_data(led_cdev);
+ int level;
+
+ if (value == LED_OFF)
+ level = 0;
+ else
+ level = 1;
+
+ if (led_dat->blinking) {
+ led_dat->platform_gpio_blink_set(led_dat->gpiod, level,
+ NULL, NULL);
+ led_dat->blinking = 0;
+ } else {
+ if (led_dat->can_sleep)
+ gpiod_set_value_cansleep(led_dat->gpiod, level);
+ else
+ gpiod_set_value(led_dat->gpiod, level);
+ }
+}
+
+static int gpio_led_set_blocking(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ gpio_led_set(led_cdev, value);
+ return 0;
+}
+
+static int gpio_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ struct gpio_led_data *led_dat = cdev_to_gpio_led_data(led_cdev);
+
+ led_dat->blinking = 1;
+ return led_dat->platform_gpio_blink_set(led_dat->gpiod, GPIO_LED_BLINK,
+ delay_on, delay_off);
+}
+
+static int create_gpio_led(const struct gpio_led *template,
+ struct gpio_led_data *led_dat, struct device *parent,
+ struct fwnode_handle *fwnode, gpio_blink_set_t blink_set)
+{
+ struct led_init_data init_data = {};
+ int ret, state;
+
+ led_dat->cdev.default_trigger = template->default_trigger;
+ led_dat->can_sleep = gpiod_cansleep(led_dat->gpiod);
+ if (!led_dat->can_sleep)
+ led_dat->cdev.brightness_set = gpio_led_set;
+ else
+ led_dat->cdev.brightness_set_blocking = gpio_led_set_blocking;
+ led_dat->blinking = 0;
+ if (blink_set) {
+ led_dat->platform_gpio_blink_set = blink_set;
+ led_dat->cdev.blink_set = gpio_blink_set;
+ }
+ if (template->default_state == LEDS_GPIO_DEFSTATE_KEEP) {
+ state = gpiod_get_value_cansleep(led_dat->gpiod);
+ if (state < 0)
+ return state;
+ } else {
+ state = (template->default_state == LEDS_GPIO_DEFSTATE_ON);
+ }
+ led_dat->cdev.brightness = state;
+ led_dat->cdev.max_brightness = 1;
+ if (!template->retain_state_suspended)
+ led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
+ if (template->panic_indicator)
+ led_dat->cdev.flags |= LED_PANIC_INDICATOR;
+ if (template->retain_state_shutdown)
+ led_dat->cdev.flags |= LED_RETAIN_AT_SHUTDOWN;
+
+ ret = gpiod_direction_output(led_dat->gpiod, state);
+ if (ret < 0)
+ return ret;
+
+ if (template->name) {
+ led_dat->cdev.name = template->name;
+ ret = devm_led_classdev_register(parent, &led_dat->cdev);
+ } else {
+ init_data.fwnode = fwnode;
+ ret = devm_led_classdev_register_ext(parent, &led_dat->cdev,
+ &init_data);
+ }
+
+ return ret;
+}
+
+struct gpio_leds_priv {
+ int num_leds;
+ struct gpio_led_data leds[];
+};
+
+static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct fwnode_handle *child;
+ struct gpio_leds_priv *priv;
+ int count, ret;
+
+ count = device_get_child_node_count(dev);
+ if (!count)
+ return ERR_PTR(-ENODEV);
+
+ priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
+ if (!priv)
+ return ERR_PTR(-ENOMEM);
+
+ device_for_each_child_node(dev, child) {
+ struct gpio_led_data *led_dat = &priv->leds[priv->num_leds];
+ struct gpio_led led = {};
+
+ /*
+ * Acquire gpiod from DT with uninitialized label, which
+ * will be updated after LED class device is registered,
+ * Only then the final LED name is known.
+ */
+ led.gpiod = devm_fwnode_get_gpiod_from_child(dev, NULL, child,
+ GPIOD_ASIS,
+ NULL);
+ if (IS_ERR(led.gpiod)) {
+ fwnode_handle_put(child);
+ return ERR_CAST(led.gpiod);
+ }
+
+ led_dat->gpiod = led.gpiod;
+
+ led.default_state = led_init_default_state_get(child);
+
+ if (fwnode_property_present(child, "retain-state-suspended"))
+ led.retain_state_suspended = 1;
+ if (fwnode_property_present(child, "retain-state-shutdown"))
+ led.retain_state_shutdown = 1;
+ if (fwnode_property_present(child, "panic-indicator"))
+ led.panic_indicator = 1;
+
+ ret = create_gpio_led(&led, led_dat, dev, child, NULL);
+ if (ret < 0) {
+ fwnode_handle_put(child);
+ return ERR_PTR(ret);
+ }
+ /* Set gpiod label to match the corresponding LED name. */
+ gpiod_set_consumer_name(led_dat->gpiod,
+ led_dat->cdev.dev->kobj.name);
+ priv->num_leds++;
+ }
+
+ return priv;
+}
+
+static const struct of_device_id of_gpio_leds_match[] = {
+ { .compatible = "gpio-leds", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, of_gpio_leds_match);
+
+static struct gpio_desc *gpio_led_get_gpiod(struct device *dev, int idx,
+ const struct gpio_led *template)
+{
+ struct gpio_desc *gpiod;
+ unsigned long flags = GPIOF_OUT_INIT_LOW;
+ int ret;
+
+ /*
+ * This means the LED does not come from the device tree
+ * or ACPI, so let's try just getting it by index from the
+ * device, this will hit the board file, if any and get
+ * the GPIO from there.
+ */
+ gpiod = devm_gpiod_get_index(dev, NULL, idx, GPIOD_OUT_LOW);
+ if (!IS_ERR(gpiod)) {
+ gpiod_set_consumer_name(gpiod, template->name);
+ return gpiod;
+ }
+ if (PTR_ERR(gpiod) != -ENOENT)
+ return gpiod;
+
+ /*
+ * This is the legacy code path for platform code that
+ * still uses GPIO numbers. Ultimately we would like to get
+ * rid of this block completely.
+ */
+
+ /* skip leds that aren't available */
+ if (!gpio_is_valid(template->gpio))
+ return ERR_PTR(-ENOENT);
+
+ if (template->active_low)
+ flags |= GPIOF_ACTIVE_LOW;
+
+ ret = devm_gpio_request_one(dev, template->gpio, flags,
+ template->name);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ gpiod = gpio_to_desc(template->gpio);
+ if (!gpiod)
+ return ERR_PTR(-EINVAL);
+
+ return gpiod;
+}
+
+static int gpio_led_probe(struct platform_device *pdev)
+{
+ struct gpio_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct gpio_leds_priv *priv;
+ int i, ret = 0;
+
+ if (pdata && pdata->num_leds) {
+ priv = devm_kzalloc(&pdev->dev, struct_size(priv, leds, pdata->num_leds),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->num_leds = pdata->num_leds;
+ for (i = 0; i < priv->num_leds; i++) {
+ const struct gpio_led *template = &pdata->leds[i];
+ struct gpio_led_data *led_dat = &priv->leds[i];
+
+ if (template->gpiod)
+ led_dat->gpiod = template->gpiod;
+ else
+ led_dat->gpiod =
+ gpio_led_get_gpiod(&pdev->dev,
+ i, template);
+ if (IS_ERR(led_dat->gpiod)) {
+ dev_info(&pdev->dev, "Skipping unavailable LED gpio %d (%s)\n",
+ template->gpio, template->name);
+ continue;
+ }
+
+ ret = create_gpio_led(template, led_dat,
+ &pdev->dev, NULL,
+ pdata->gpio_blink_set);
+ if (ret < 0)
+ return ret;
+ }
+ } else {
+ priv = gpio_leds_create(pdev);
+ if (IS_ERR(priv))
+ return PTR_ERR(priv);
+ }
+
+ platform_set_drvdata(pdev, priv);
+
+ return 0;
+}
+
+static void gpio_led_shutdown(struct platform_device *pdev)
+{
+ struct gpio_leds_priv *priv = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < priv->num_leds; i++) {
+ struct gpio_led_data *led = &priv->leds[i];
+
+ if (!(led->cdev.flags & LED_RETAIN_AT_SHUTDOWN))
+ gpio_led_set(&led->cdev, LED_OFF);
+ }
+}
+
+static struct platform_driver gpio_led_driver = {
+ .probe = gpio_led_probe,
+ .shutdown = gpio_led_shutdown,
+ .driver = {
+ .name = "leds-gpio",
+ .of_match_table = of_gpio_leds_match,
+ },
+};
+
+module_platform_driver(gpio_led_driver);
+
+MODULE_AUTHOR("Raphael Assenat <raph@8d.com>, Trent Piepho <tpiepho@freescale.com>");
+MODULE_DESCRIPTION("GPIO LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:leds-gpio");
diff --git a/drivers/leds/leds-hp6xx.c b/drivers/leds/leds-hp6xx.c
new file mode 100644
index 000000000..54af9e63c
--- /dev/null
+++ b/drivers/leds/leds-hp6xx.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Triggers Core
+ * For the HP Jornada 620/660/680/690 handhelds
+ *
+ * Copyright 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
+ * this driver is based on leds-spitz.c by Richard Purdie.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <asm/hd64461.h>
+#include <mach/hp6xx.h>
+
+static void hp6xxled_green_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ u8 v8;
+
+ v8 = inb(PKDR);
+ if (value)
+ outb(v8 & (~PKDR_LED_GREEN), PKDR);
+ else
+ outb(v8 | PKDR_LED_GREEN, PKDR);
+}
+
+static void hp6xxled_red_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ u16 v16;
+
+ v16 = inw(HD64461_GPBDR);
+ if (value)
+ outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
+ else
+ outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
+}
+
+static struct led_classdev hp6xx_red_led = {
+ .name = "hp6xx:red",
+ .default_trigger = "hp6xx-charge",
+ .brightness_set = hp6xxled_red_set,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static struct led_classdev hp6xx_green_led = {
+ .name = "hp6xx:green",
+ .default_trigger = "disk-activity",
+ .brightness_set = hp6xxled_green_set,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static int hp6xxled_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = devm_led_classdev_register(&pdev->dev, &hp6xx_red_led);
+ if (ret < 0)
+ return ret;
+
+ return devm_led_classdev_register(&pdev->dev, &hp6xx_green_led);
+}
+
+static struct platform_driver hp6xxled_driver = {
+ .probe = hp6xxled_probe,
+ .driver = {
+ .name = "hp6xx-led",
+ },
+};
+
+module_platform_driver(hp6xxled_driver);
+
+MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
+MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:hp6xx-led");
diff --git a/drivers/leds/leds-ip30.c b/drivers/leds/leds-ip30.c
new file mode 100644
index 000000000..1f952bad0
--- /dev/null
+++ b/drivers/leds/leds-ip30.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * LED Driver for SGI Octane machines
+ */
+
+#include <asm/io.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+
+#define IP30_LED_SYSTEM 0
+#define IP30_LED_FAULT 1
+
+struct ip30_led {
+ struct led_classdev cdev;
+ u32 __iomem *reg;
+};
+
+static void ip30led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct ip30_led *led = container_of(led_cdev, struct ip30_led, cdev);
+
+ writel(value, led->reg);
+}
+
+static int ip30led_create(struct platform_device *pdev, int num)
+{
+ struct resource *res;
+ struct ip30_led *data;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, num);
+ if (!res)
+ return -EBUSY;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(data->reg))
+ return PTR_ERR(data->reg);
+
+
+ switch (num) {
+ case IP30_LED_SYSTEM:
+ data->cdev.name = "white:power";
+ break;
+ case IP30_LED_FAULT:
+ data->cdev.name = "red:fault";
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ data->cdev.brightness = readl(data->reg);
+ data->cdev.max_brightness = 1;
+ data->cdev.brightness_set = ip30led_set;
+
+ return devm_led_classdev_register(&pdev->dev, &data->cdev);
+}
+
+static int ip30led_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = ip30led_create(pdev, IP30_LED_SYSTEM);
+ if (ret < 0)
+ return ret;
+
+ return ip30led_create(pdev, IP30_LED_FAULT);
+}
+
+static struct platform_driver ip30led_driver = {
+ .probe = ip30led_probe,
+ .driver = {
+ .name = "ip30-leds",
+ },
+};
+
+module_platform_driver(ip30led_driver);
+
+MODULE_AUTHOR("Thomas Bogendoerfer <tbogendoerfer@suse.de>");
+MODULE_DESCRIPTION("SGI Octane LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:ip30-leds");
diff --git a/drivers/leds/leds-ipaq-micro.c b/drivers/leds/leds-ipaq-micro.c
new file mode 100644
index 000000000..504a95b6e
--- /dev/null
+++ b/drivers/leds/leds-ipaq-micro.c
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *
+ * h3xxx atmel micro companion support, notification LED subdevice
+ *
+ * Author : Linus Walleij <linus.walleij@linaro.org>
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/ipaq-micro.h>
+#include <linux/leds.h>
+
+#define LED_YELLOW 0x00
+#define LED_GREEN 0x01
+
+#define LED_EN (1 << 4) /* LED ON/OFF 0:off, 1:on */
+#define LED_AUTOSTOP (1 << 5) /* LED ON/OFF auto stop set 0:disable, 1:enable */
+#define LED_ALWAYS (1 << 6) /* LED Interrupt Mask 0:No mask, 1:mask */
+
+static int micro_leds_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct ipaq_micro *micro = dev_get_drvdata(led_cdev->dev->parent->parent);
+ /*
+ * In this message:
+ * Byte 0 = LED color: 0 = yellow, 1 = green
+ * yellow LED is always ~30 blinks per minute
+ * Byte 1 = duration (flags?) appears to be ignored
+ * Byte 2 = green ontime in 1/10 sec (deciseconds)
+ * 1 = 1/10 second
+ * 0 = 256/10 second
+ * Byte 3 = green offtime in 1/10 sec (deciseconds)
+ * 1 = 1/10 second
+ * 0 = 256/10 seconds
+ */
+ struct ipaq_micro_msg msg = {
+ .id = MSG_NOTIFY_LED,
+ .tx_len = 4,
+ };
+
+ msg.tx_data[0] = LED_GREEN;
+ msg.tx_data[1] = 0;
+ if (value) {
+ msg.tx_data[2] = 0; /* Duty cycle 256 */
+ msg.tx_data[3] = 1;
+ } else {
+ msg.tx_data[2] = 1;
+ msg.tx_data[3] = 0; /* Duty cycle 256 */
+ }
+ return ipaq_micro_tx_msg_sync(micro, &msg);
+}
+
+/* Maximum duty cycle in ms 256/10 sec = 25600 ms */
+#define IPAQ_LED_MAX_DUTY 25600
+
+static int micro_leds_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct ipaq_micro *micro = dev_get_drvdata(led_cdev->dev->parent->parent);
+ /*
+ * In this message:
+ * Byte 0 = LED color: 0 = yellow, 1 = green
+ * yellow LED is always ~30 blinks per minute
+ * Byte 1 = duration (flags?) appears to be ignored
+ * Byte 2 = green ontime in 1/10 sec (deciseconds)
+ * 1 = 1/10 second
+ * 0 = 256/10 second
+ * Byte 3 = green offtime in 1/10 sec (deciseconds)
+ * 1 = 1/10 second
+ * 0 = 256/10 seconds
+ */
+ struct ipaq_micro_msg msg = {
+ .id = MSG_NOTIFY_LED,
+ .tx_len = 4,
+ };
+
+ msg.tx_data[0] = LED_GREEN;
+ if (*delay_on > IPAQ_LED_MAX_DUTY ||
+ *delay_off > IPAQ_LED_MAX_DUTY)
+ return -EINVAL;
+
+ if (*delay_on == 0 && *delay_off == 0) {
+ *delay_on = 100;
+ *delay_off = 100;
+ }
+
+ msg.tx_data[1] = 0;
+ if (*delay_on >= IPAQ_LED_MAX_DUTY)
+ msg.tx_data[2] = 0;
+ else
+ msg.tx_data[2] = (u8) DIV_ROUND_CLOSEST(*delay_on, 100);
+ if (*delay_off >= IPAQ_LED_MAX_DUTY)
+ msg.tx_data[3] = 0;
+ else
+ msg.tx_data[3] = (u8) DIV_ROUND_CLOSEST(*delay_off, 100);
+ return ipaq_micro_tx_msg_sync(micro, &msg);
+}
+
+static struct led_classdev micro_led = {
+ .name = "led-ipaq-micro",
+ .brightness_set_blocking = micro_leds_brightness_set,
+ .blink_set = micro_leds_blink_set,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static int micro_leds_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = devm_led_classdev_register(&pdev->dev, &micro_led);
+ if (ret) {
+ dev_err(&pdev->dev, "registering led failed: %d\n", ret);
+ return ret;
+ }
+ dev_info(&pdev->dev, "iPAQ micro notification LED driver\n");
+
+ return 0;
+}
+
+static struct platform_driver micro_leds_device_driver = {
+ .driver = {
+ .name = "ipaq-micro-leds",
+ },
+ .probe = micro_leds_probe,
+};
+module_platform_driver(micro_leds_device_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("driver for iPAQ Atmel micro leds");
+MODULE_ALIAS("platform:ipaq-micro-leds");
diff --git a/drivers/leds/leds-is31fl319x.c b/drivers/leds/leds-is31fl319x.c
new file mode 100644
index 000000000..7c908414a
--- /dev/null
+++ b/drivers/leds/leds-is31fl319x.c
@@ -0,0 +1,614 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2015-16 Golden Delicious Computers
+ *
+ * Author: Nikolaus Schaller <hns@goldelico.com>
+ *
+ * LED driver for the IS31FL319{0,1,3,6,9} to drive 1, 3, 6 or 9 light
+ * effect LEDs.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+
+/* register numbers */
+#define IS31FL319X_SHUTDOWN 0x00
+
+/* registers for 3190, 3191 and 3193 */
+#define IS31FL3190_BREATHING 0x01
+#define IS31FL3190_LEDMODE 0x02
+#define IS31FL3190_CURRENT 0x03
+#define IS31FL3190_PWM(channel) (0x04 + channel)
+#define IS31FL3190_DATA_UPDATE 0x07
+#define IS31FL3190_T0(channel) (0x0a + channel)
+#define IS31FL3190_T1T2(channel) (0x10 + channel)
+#define IS31FL3190_T3T4(channel) (0x16 + channel)
+#define IS31FL3190_TIME_UPDATE 0x1c
+#define IS31FL3190_LEDCONTROL 0x1d
+#define IS31FL3190_RESET 0x2f
+
+#define IS31FL3190_CURRENT_uA_MIN 5000
+#define IS31FL3190_CURRENT_uA_DEFAULT 42000
+#define IS31FL3190_CURRENT_uA_MAX 42000
+#define IS31FL3190_CURRENT_SHIFT 2
+#define IS31FL3190_CURRENT_MASK GENMASK(4, 2)
+#define IS31FL3190_CURRENT_5_mA 0x02
+#define IS31FL3190_CURRENT_10_mA 0x01
+#define IS31FL3190_CURRENT_17dot5_mA 0x04
+#define IS31FL3190_CURRENT_30_mA 0x03
+#define IS31FL3190_CURRENT_42_mA 0x00
+
+/* registers for 3196 and 3199 */
+#define IS31FL3196_CTRL1 0x01
+#define IS31FL3196_CTRL2 0x02
+#define IS31FL3196_CONFIG1 0x03
+#define IS31FL3196_CONFIG2 0x04
+#define IS31FL3196_RAMP_MODE 0x05
+#define IS31FL3196_BREATH_MARK 0x06
+#define IS31FL3196_PWM(channel) (0x07 + channel)
+#define IS31FL3196_DATA_UPDATE 0x10
+#define IS31FL3196_T0(channel) (0x11 + channel)
+#define IS31FL3196_T123_1 0x1a
+#define IS31FL3196_T123_2 0x1b
+#define IS31FL3196_T123_3 0x1c
+#define IS31FL3196_T4(channel) (0x1d + channel)
+#define IS31FL3196_TIME_UPDATE 0x26
+#define IS31FL3196_RESET 0xff
+
+#define IS31FL3196_REG_CNT (IS31FL3196_RESET + 1)
+
+#define IS31FL319X_MAX_LEDS 9
+
+/* CS (Current Setting) in CONFIG2 register */
+#define IS31FL3196_CONFIG2_CS_SHIFT 4
+#define IS31FL3196_CONFIG2_CS_MASK GENMASK(2, 0)
+#define IS31FL3196_CONFIG2_CS_STEP_REF 12
+
+#define IS31FL3196_CURRENT_uA_MIN 5000
+#define IS31FL3196_CURRENT_uA_MAX 40000
+#define IS31FL3196_CURRENT_uA_STEP 5000
+#define IS31FL3196_CURRENT_uA_DEFAULT 20000
+
+/* Audio gain in CONFIG2 register */
+#define IS31FL3196_AUDIO_GAIN_DB_MAX ((u32)21)
+#define IS31FL3196_AUDIO_GAIN_DB_STEP 3
+
+/*
+ * regmap is used as a cache of chip's register space,
+ * to avoid reading back brightness values from chip,
+ * which is known to hang.
+ */
+struct is31fl319x_chip {
+ const struct is31fl319x_chipdef *cdef;
+ struct i2c_client *client;
+ struct gpio_desc *shutdown_gpio;
+ struct regmap *regmap;
+ struct mutex lock;
+ u32 audio_gain_db;
+
+ struct is31fl319x_led {
+ struct is31fl319x_chip *chip;
+ struct led_classdev cdev;
+ u32 max_microamp;
+ bool configured;
+ } leds[IS31FL319X_MAX_LEDS];
+};
+
+struct is31fl319x_chipdef {
+ int num_leds;
+ u8 reset_reg;
+ const struct regmap_config *is31fl319x_regmap_config;
+ int (*brightness_set)(struct led_classdev *cdev, enum led_brightness brightness);
+ u32 current_default;
+ u32 current_min;
+ u32 current_max;
+ bool is_3196or3199;
+};
+
+static bool is31fl319x_readable_reg(struct device *dev, unsigned int reg)
+{
+ /* we have no readable registers */
+ return false;
+}
+
+static bool is31fl3190_volatile_reg(struct device *dev, unsigned int reg)
+{
+ /* volatile registers are not cached */
+ switch (reg) {
+ case IS31FL3190_DATA_UPDATE:
+ case IS31FL3190_TIME_UPDATE:
+ case IS31FL3190_RESET:
+ return true; /* always write-through */
+ default:
+ return false;
+ }
+}
+
+static const struct reg_default is31fl3190_reg_defaults[] = {
+ { IS31FL3190_LEDMODE, 0x00 },
+ { IS31FL3190_CURRENT, 0x00 },
+ { IS31FL3190_PWM(0), 0x00 },
+ { IS31FL3190_PWM(1), 0x00 },
+ { IS31FL3190_PWM(2), 0x00 },
+};
+
+static struct regmap_config is31fl3190_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = IS31FL3190_RESET,
+ .cache_type = REGCACHE_FLAT,
+ .readable_reg = is31fl319x_readable_reg,
+ .volatile_reg = is31fl3190_volatile_reg,
+ .reg_defaults = is31fl3190_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(is31fl3190_reg_defaults),
+};
+
+static bool is31fl3196_volatile_reg(struct device *dev, unsigned int reg)
+{
+ /* volatile registers are not cached */
+ switch (reg) {
+ case IS31FL3196_DATA_UPDATE:
+ case IS31FL3196_TIME_UPDATE:
+ case IS31FL3196_RESET:
+ return true; /* always write-through */
+ default:
+ return false;
+ }
+}
+
+static const struct reg_default is31fl3196_reg_defaults[] = {
+ { IS31FL3196_CONFIG1, 0x00 },
+ { IS31FL3196_CONFIG2, 0x00 },
+ { IS31FL3196_PWM(0), 0x00 },
+ { IS31FL3196_PWM(1), 0x00 },
+ { IS31FL3196_PWM(2), 0x00 },
+ { IS31FL3196_PWM(3), 0x00 },
+ { IS31FL3196_PWM(4), 0x00 },
+ { IS31FL3196_PWM(5), 0x00 },
+ { IS31FL3196_PWM(6), 0x00 },
+ { IS31FL3196_PWM(7), 0x00 },
+ { IS31FL3196_PWM(8), 0x00 },
+};
+
+static struct regmap_config is31fl3196_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = IS31FL3196_REG_CNT,
+ .cache_type = REGCACHE_FLAT,
+ .readable_reg = is31fl319x_readable_reg,
+ .volatile_reg = is31fl3196_volatile_reg,
+ .reg_defaults = is31fl3196_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(is31fl3196_reg_defaults),
+};
+
+static int is31fl3190_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct is31fl319x_led *led = container_of(cdev, struct is31fl319x_led, cdev);
+ struct is31fl319x_chip *is31 = led->chip;
+ int chan = led - is31->leds;
+ int ret;
+ int i;
+ u8 ctrl = 0;
+
+ dev_dbg(&is31->client->dev, "channel %d: %d\n", chan, brightness);
+
+ mutex_lock(&is31->lock);
+
+ /* update PWM register */
+ ret = regmap_write(is31->regmap, IS31FL3190_PWM(chan), brightness);
+ if (ret < 0)
+ goto out;
+
+ /* read current brightness of all PWM channels */
+ for (i = 0; i < is31->cdef->num_leds; i++) {
+ unsigned int pwm_value;
+ bool on;
+
+ /*
+ * since neither cdev nor the chip can provide
+ * the current setting, we read from the regmap cache
+ */
+
+ ret = regmap_read(is31->regmap, IS31FL3190_PWM(i), &pwm_value);
+ on = ret >= 0 && pwm_value > LED_OFF;
+
+ ctrl |= on << i;
+ }
+
+ if (ctrl > 0) {
+ dev_dbg(&is31->client->dev, "power up %02x\n", ctrl);
+ regmap_write(is31->regmap, IS31FL3190_LEDCONTROL, ctrl);
+ /* update PWMs */
+ regmap_write(is31->regmap, IS31FL3190_DATA_UPDATE, 0x00);
+ /* enable chip from shut down and enable all channels */
+ ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x20);
+ } else {
+ dev_dbg(&is31->client->dev, "power down\n");
+ /* shut down (no need to clear LEDCONTROL) */
+ ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x01);
+ }
+
+out:
+ mutex_unlock(&is31->lock);
+
+ return ret;
+}
+
+static int is31fl3196_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct is31fl319x_led *led = container_of(cdev, struct is31fl319x_led, cdev);
+ struct is31fl319x_chip *is31 = led->chip;
+ int chan = led - is31->leds;
+ int ret;
+ int i;
+ u8 ctrl1 = 0, ctrl2 = 0;
+
+ dev_dbg(&is31->client->dev, "channel %d: %d\n", chan, brightness);
+
+ mutex_lock(&is31->lock);
+
+ /* update PWM register */
+ ret = regmap_write(is31->regmap, IS31FL3196_PWM(chan), brightness);
+ if (ret < 0)
+ goto out;
+
+ /* read current brightness of all PWM channels */
+ for (i = 0; i < is31->cdef->num_leds; i++) {
+ unsigned int pwm_value;
+ bool on;
+
+ /*
+ * since neither cdev nor the chip can provide
+ * the current setting, we read from the regmap cache
+ */
+
+ ret = regmap_read(is31->regmap, IS31FL3196_PWM(i), &pwm_value);
+ on = ret >= 0 && pwm_value > LED_OFF;
+
+ if (i < 3)
+ ctrl1 |= on << i; /* 0..2 => bit 0..2 */
+ else if (i < 6)
+ ctrl1 |= on << (i + 1); /* 3..5 => bit 4..6 */
+ else
+ ctrl2 |= on << (i - 6); /* 6..8 => bit 0..2 */
+ }
+
+ if (ctrl1 > 0 || ctrl2 > 0) {
+ dev_dbg(&is31->client->dev, "power up %02x %02x\n",
+ ctrl1, ctrl2);
+ regmap_write(is31->regmap, IS31FL3196_CTRL1, ctrl1);
+ regmap_write(is31->regmap, IS31FL3196_CTRL2, ctrl2);
+ /* update PWMs */
+ regmap_write(is31->regmap, IS31FL3196_DATA_UPDATE, 0x00);
+ /* enable chip from shut down */
+ ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x01);
+ } else {
+ dev_dbg(&is31->client->dev, "power down\n");
+ /* shut down (no need to clear CTRL1/2) */
+ ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x00);
+ }
+
+out:
+ mutex_unlock(&is31->lock);
+
+ return ret;
+}
+
+static const struct is31fl319x_chipdef is31fl3190_cdef = {
+ .num_leds = 1,
+ .reset_reg = IS31FL3190_RESET,
+ .is31fl319x_regmap_config = &is31fl3190_regmap_config,
+ .brightness_set = is31fl3190_brightness_set,
+ .current_default = IS31FL3190_CURRENT_uA_DEFAULT,
+ .current_min = IS31FL3190_CURRENT_uA_MIN,
+ .current_max = IS31FL3190_CURRENT_uA_MAX,
+ .is_3196or3199 = false,
+};
+
+static const struct is31fl319x_chipdef is31fl3193_cdef = {
+ .num_leds = 3,
+ .reset_reg = IS31FL3190_RESET,
+ .is31fl319x_regmap_config = &is31fl3190_regmap_config,
+ .brightness_set = is31fl3190_brightness_set,
+ .current_default = IS31FL3190_CURRENT_uA_DEFAULT,
+ .current_min = IS31FL3190_CURRENT_uA_MIN,
+ .current_max = IS31FL3190_CURRENT_uA_MAX,
+ .is_3196or3199 = false,
+};
+
+static const struct is31fl319x_chipdef is31fl3196_cdef = {
+ .num_leds = 6,
+ .reset_reg = IS31FL3196_RESET,
+ .is31fl319x_regmap_config = &is31fl3196_regmap_config,
+ .brightness_set = is31fl3196_brightness_set,
+ .current_default = IS31FL3196_CURRENT_uA_DEFAULT,
+ .current_min = IS31FL3196_CURRENT_uA_MIN,
+ .current_max = IS31FL3196_CURRENT_uA_MAX,
+ .is_3196or3199 = true,
+};
+
+static const struct is31fl319x_chipdef is31fl3199_cdef = {
+ .num_leds = 9,
+ .reset_reg = IS31FL3196_RESET,
+ .is31fl319x_regmap_config = &is31fl3196_regmap_config,
+ .brightness_set = is31fl3196_brightness_set,
+ .current_default = IS31FL3196_CURRENT_uA_DEFAULT,
+ .current_min = IS31FL3196_CURRENT_uA_MIN,
+ .current_max = IS31FL3196_CURRENT_uA_MAX,
+ .is_3196or3199 = true,
+};
+
+static const struct of_device_id of_is31fl319x_match[] = {
+ { .compatible = "issi,is31fl3190", .data = &is31fl3190_cdef, },
+ { .compatible = "issi,is31fl3191", .data = &is31fl3190_cdef, },
+ { .compatible = "issi,is31fl3193", .data = &is31fl3193_cdef, },
+ { .compatible = "issi,is31fl3196", .data = &is31fl3196_cdef, },
+ { .compatible = "issi,is31fl3199", .data = &is31fl3199_cdef, },
+ { .compatible = "si-en,sn3190", .data = &is31fl3190_cdef, },
+ { .compatible = "si-en,sn3191", .data = &is31fl3190_cdef, },
+ { .compatible = "si-en,sn3193", .data = &is31fl3193_cdef, },
+ { .compatible = "si-en,sn3196", .data = &is31fl3196_cdef, },
+ { .compatible = "si-en,sn3199", .data = &is31fl3199_cdef, },
+ { }
+};
+MODULE_DEVICE_TABLE(of, of_is31fl319x_match);
+
+static int is31fl319x_parse_child_fw(const struct device *dev,
+ const struct fwnode_handle *child,
+ struct is31fl319x_led *led,
+ struct is31fl319x_chip *is31)
+{
+ struct led_classdev *cdev = &led->cdev;
+ int ret;
+
+ if (fwnode_property_read_string(child, "label", &cdev->name))
+ cdev->name = fwnode_get_name(child);
+
+ ret = fwnode_property_read_string(child, "linux,default-trigger", &cdev->default_trigger);
+ if (ret < 0 && ret != -EINVAL) /* is optional */
+ return ret;
+
+ led->max_microamp = is31->cdef->current_default;
+ ret = fwnode_property_read_u32(child, "led-max-microamp", &led->max_microamp);
+ if (!ret) {
+ if (led->max_microamp < is31->cdef->current_min)
+ return -EINVAL; /* not supported */
+ led->max_microamp = min(led->max_microamp,
+ is31->cdef->current_max);
+ }
+
+ return 0;
+}
+
+static int is31fl319x_parse_fw(struct device *dev, struct is31fl319x_chip *is31)
+{
+ struct fwnode_handle *fwnode = dev_fwnode(dev), *child;
+ int count;
+ int ret;
+
+ is31->shutdown_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
+ if (IS_ERR(is31->shutdown_gpio))
+ return dev_err_probe(dev, PTR_ERR(is31->shutdown_gpio),
+ "Failed to get shutdown gpio\n");
+
+ is31->cdef = device_get_match_data(dev);
+
+ count = 0;
+ fwnode_for_each_available_child_node(fwnode, child)
+ count++;
+
+ dev_dbg(dev, "probing with %d leds defined in DT\n", count);
+
+ if (!count || count > is31->cdef->num_leds)
+ return dev_err_probe(dev, -ENODEV,
+ "Number of leds defined must be between 1 and %u\n",
+ is31->cdef->num_leds);
+
+ fwnode_for_each_available_child_node(fwnode, child) {
+ struct is31fl319x_led *led;
+ u32 reg;
+
+ ret = fwnode_property_read_u32(child, "reg", &reg);
+ if (ret) {
+ ret = dev_err_probe(dev, ret, "Failed to read led 'reg' property\n");
+ goto put_child_node;
+ }
+
+ if (reg < 1 || reg > is31->cdef->num_leds) {
+ ret = dev_err_probe(dev, -EINVAL, "invalid led reg %u\n", reg);
+ goto put_child_node;
+ }
+
+ led = &is31->leds[reg - 1];
+
+ if (led->configured) {
+ ret = dev_err_probe(dev, -EINVAL, "led %u is already configured\n", reg);
+ goto put_child_node;
+ }
+
+ ret = is31fl319x_parse_child_fw(dev, child, led, is31);
+ if (ret) {
+ ret = dev_err_probe(dev, ret, "led %u DT parsing failed\n", reg);
+ goto put_child_node;
+ }
+
+ led->configured = true;
+ }
+
+ is31->audio_gain_db = 0;
+ if (is31->cdef->is_3196or3199) {
+ ret = fwnode_property_read_u32(fwnode, "audio-gain-db", &is31->audio_gain_db);
+ if (!ret)
+ is31->audio_gain_db = min(is31->audio_gain_db,
+ IS31FL3196_AUDIO_GAIN_DB_MAX);
+ }
+
+ return 0;
+
+put_child_node:
+ fwnode_handle_put(child);
+ return ret;
+}
+
+static inline int is31fl3190_microamp_to_cs(struct device *dev, u32 microamp)
+{
+ switch (microamp) {
+ case 5000:
+ return IS31FL3190_CURRENT_5_mA;
+ case 10000:
+ return IS31FL3190_CURRENT_10_mA;
+ case 17500:
+ return IS31FL3190_CURRENT_17dot5_mA;
+ case 30000:
+ return IS31FL3190_CURRENT_30_mA;
+ case 42000:
+ return IS31FL3190_CURRENT_42_mA;
+ default:
+ dev_warn(dev, "Unsupported current value: %d, using 5000 µA!\n", microamp);
+ return IS31FL3190_CURRENT_5_mA;
+ }
+}
+
+static inline int is31fl3196_microamp_to_cs(struct device *dev, u32 microamp)
+{
+ /* round down to nearest supported value (range check done by caller) */
+ u32 step = microamp / IS31FL3196_CURRENT_uA_STEP;
+
+ return ((IS31FL3196_CONFIG2_CS_STEP_REF - step) &
+ IS31FL3196_CONFIG2_CS_MASK) <<
+ IS31FL3196_CONFIG2_CS_SHIFT; /* CS encoding */
+}
+
+static inline int is31fl3196_db_to_gain(u32 dezibel)
+{
+ /* round down to nearest supported value (range check done by caller) */
+ return dezibel / IS31FL3196_AUDIO_GAIN_DB_STEP;
+}
+
+static void is31f1319x_mutex_destroy(void *lock)
+{
+ mutex_destroy(lock);
+}
+
+static int is31fl319x_probe(struct i2c_client *client)
+{
+ struct is31fl319x_chip *is31;
+ struct device *dev = &client->dev;
+ int err;
+ int i = 0;
+ u32 aggregated_led_microamp;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+ return -EIO;
+
+ is31 = devm_kzalloc(&client->dev, sizeof(*is31), GFP_KERNEL);
+ if (!is31)
+ return -ENOMEM;
+
+ mutex_init(&is31->lock);
+ err = devm_add_action_or_reset(dev, is31f1319x_mutex_destroy, &is31->lock);
+ if (err)
+ return err;
+
+ err = is31fl319x_parse_fw(&client->dev, is31);
+ if (err)
+ return err;
+
+ if (is31->shutdown_gpio) {
+ gpiod_direction_output(is31->shutdown_gpio, 0);
+ mdelay(5);
+ gpiod_direction_output(is31->shutdown_gpio, 1);
+ }
+
+ is31->client = client;
+ is31->regmap = devm_regmap_init_i2c(client, is31->cdef->is31fl319x_regmap_config);
+ if (IS_ERR(is31->regmap))
+ return dev_err_probe(dev, PTR_ERR(is31->regmap), "failed to allocate register map\n");
+
+ i2c_set_clientdata(client, is31);
+
+ /* check for write-reply from chip (we can't read any registers) */
+ err = regmap_write(is31->regmap, is31->cdef->reset_reg, 0x00);
+ if (err < 0)
+ return dev_err_probe(dev, err, "no response from chip write\n");
+
+ /*
+ * Kernel conventions require per-LED led-max-microamp property.
+ * But the chip does not allow to limit individual LEDs.
+ * So we take minimum from all subnodes for safety of hardware.
+ */
+ aggregated_led_microamp = is31->cdef->current_max;
+ for (i = 0; i < is31->cdef->num_leds; i++)
+ if (is31->leds[i].configured &&
+ is31->leds[i].max_microamp < aggregated_led_microamp)
+ aggregated_led_microamp = is31->leds[i].max_microamp;
+
+ if (is31->cdef->is_3196or3199)
+ regmap_write(is31->regmap, IS31FL3196_CONFIG2,
+ is31fl3196_microamp_to_cs(dev, aggregated_led_microamp) |
+ is31fl3196_db_to_gain(is31->audio_gain_db));
+ else
+ regmap_update_bits(is31->regmap, IS31FL3190_CURRENT, IS31FL3190_CURRENT_MASK,
+ is31fl3190_microamp_to_cs(dev, aggregated_led_microamp) << IS31FL3190_CURRENT_SHIFT);
+
+ for (i = 0; i < is31->cdef->num_leds; i++) {
+ struct is31fl319x_led *led = &is31->leds[i];
+
+ if (!led->configured)
+ continue;
+
+ led->chip = is31;
+ led->cdev.brightness_set_blocking = is31->cdef->brightness_set;
+
+ err = devm_led_classdev_register(&client->dev, &led->cdev);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+/*
+ * i2c-core (and modalias) requires that id_table be properly filled,
+ * even though it is not used for DeviceTree based instantiation.
+ */
+static const struct i2c_device_id is31fl319x_id[] = {
+ { "is31fl3190" },
+ { "is31fl3191" },
+ { "is31fl3193" },
+ { "is31fl3196" },
+ { "is31fl3199" },
+ { "sn3190" },
+ { "sn3191" },
+ { "sn3193" },
+ { "sn3196" },
+ { "sn3199" },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, is31fl319x_id);
+
+static struct i2c_driver is31fl319x_driver = {
+ .driver = {
+ .name = "leds-is31fl319x",
+ .of_match_table = of_is31fl319x_match,
+ },
+ .probe_new = is31fl319x_probe,
+ .id_table = is31fl319x_id,
+};
+
+module_i2c_driver(is31fl319x_driver);
+
+MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
+MODULE_AUTHOR("Andrey Utkin <andrey_utkin@fastmail.com>");
+MODULE_DESCRIPTION("IS31FL319X LED driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-is31fl32xx.c b/drivers/leds/leds-is31fl32xx.c
new file mode 100644
index 000000000..0d219c1ac
--- /dev/null
+++ b/drivers/leds/leds-is31fl32xx.c
@@ -0,0 +1,501 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for ISSI IS31FL32xx family of I2C LED controllers
+ *
+ * Copyright 2015 Allworx Corp.
+ *
+ * Datasheets:
+ * http://www.issi.com/US/product-analog-fxled-driver.shtml
+ * http://www.si-en.com/product.asp?parentid=890
+ */
+
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+/* Used to indicate a device has no such register */
+#define IS31FL32XX_REG_NONE 0xFF
+
+/* Software Shutdown bit in Shutdown Register */
+#define IS31FL32XX_SHUTDOWN_SSD_ENABLE 0
+#define IS31FL32XX_SHUTDOWN_SSD_DISABLE BIT(0)
+
+/* IS31FL3216 has a number of unique registers */
+#define IS31FL3216_CONFIG_REG 0x00
+#define IS31FL3216_LIGHTING_EFFECT_REG 0x03
+#define IS31FL3216_CHANNEL_CONFIG_REG 0x04
+
+/* Software Shutdown bit in 3216 Config Register */
+#define IS31FL3216_CONFIG_SSD_ENABLE BIT(7)
+#define IS31FL3216_CONFIG_SSD_DISABLE 0
+
+struct is31fl32xx_priv;
+struct is31fl32xx_led_data {
+ struct led_classdev cdev;
+ u8 channel; /* 1-based, max priv->cdef->channels */
+ struct is31fl32xx_priv *priv;
+};
+
+struct is31fl32xx_priv {
+ const struct is31fl32xx_chipdef *cdef;
+ struct i2c_client *client;
+ unsigned int num_leds;
+ struct is31fl32xx_led_data leds[];
+};
+
+/**
+ * struct is31fl32xx_chipdef - chip-specific attributes
+ * @channels : Number of LED channels
+ * @shutdown_reg : address of Shutdown register (optional)
+ * @pwm_update_reg : address of PWM Update register
+ * @global_control_reg : address of Global Control register (optional)
+ * @reset_reg : address of Reset register (optional)
+ * @pwm_register_base : address of first PWM register
+ * @pwm_registers_reversed: : true if PWM registers count down instead of up
+ * @led_control_register_base : address of first LED control register (optional)
+ * @enable_bits_per_led_control_register: number of LEDs enable bits in each
+ * @reset_func : pointer to reset function
+ * @sw_shutdown_func : pointer to software shutdown function
+ *
+ * For all optional register addresses, the sentinel value %IS31FL32XX_REG_NONE
+ * indicates that this chip has no such register.
+ *
+ * If non-NULL, @reset_func will be called during probing to set all
+ * necessary registers to a known initialization state. This is needed
+ * for chips that do not have a @reset_reg.
+ *
+ * @enable_bits_per_led_control_register must be >=1 if
+ * @led_control_register_base != %IS31FL32XX_REG_NONE.
+ */
+struct is31fl32xx_chipdef {
+ u8 channels;
+ u8 shutdown_reg;
+ u8 pwm_update_reg;
+ u8 global_control_reg;
+ u8 reset_reg;
+ u8 pwm_register_base;
+ bool pwm_registers_reversed;
+ u8 led_control_register_base;
+ u8 enable_bits_per_led_control_register;
+ int (*reset_func)(struct is31fl32xx_priv *priv);
+ int (*sw_shutdown_func)(struct is31fl32xx_priv *priv, bool enable);
+};
+
+static const struct is31fl32xx_chipdef is31fl3236_cdef = {
+ .channels = 36,
+ .shutdown_reg = 0x00,
+ .pwm_update_reg = 0x25,
+ .global_control_reg = 0x4a,
+ .reset_reg = 0x4f,
+ .pwm_register_base = 0x01,
+ .led_control_register_base = 0x26,
+ .enable_bits_per_led_control_register = 1,
+};
+
+static const struct is31fl32xx_chipdef is31fl3235_cdef = {
+ .channels = 28,
+ .shutdown_reg = 0x00,
+ .pwm_update_reg = 0x25,
+ .global_control_reg = 0x4a,
+ .reset_reg = 0x4f,
+ .pwm_register_base = 0x05,
+ .led_control_register_base = 0x2a,
+ .enable_bits_per_led_control_register = 1,
+};
+
+static const struct is31fl32xx_chipdef is31fl3218_cdef = {
+ .channels = 18,
+ .shutdown_reg = 0x00,
+ .pwm_update_reg = 0x16,
+ .global_control_reg = IS31FL32XX_REG_NONE,
+ .reset_reg = 0x17,
+ .pwm_register_base = 0x01,
+ .led_control_register_base = 0x13,
+ .enable_bits_per_led_control_register = 6,
+};
+
+static int is31fl3216_reset(struct is31fl32xx_priv *priv);
+static int is31fl3216_software_shutdown(struct is31fl32xx_priv *priv,
+ bool enable);
+static const struct is31fl32xx_chipdef is31fl3216_cdef = {
+ .channels = 16,
+ .shutdown_reg = IS31FL32XX_REG_NONE,
+ .pwm_update_reg = 0xB0,
+ .global_control_reg = IS31FL32XX_REG_NONE,
+ .reset_reg = IS31FL32XX_REG_NONE,
+ .pwm_register_base = 0x10,
+ .pwm_registers_reversed = true,
+ .led_control_register_base = 0x01,
+ .enable_bits_per_led_control_register = 8,
+ .reset_func = is31fl3216_reset,
+ .sw_shutdown_func = is31fl3216_software_shutdown,
+};
+
+static int is31fl32xx_write(struct is31fl32xx_priv *priv, u8 reg, u8 val)
+{
+ int ret;
+
+ dev_dbg(&priv->client->dev, "writing register 0x%02X=0x%02X", reg, val);
+
+ ret = i2c_smbus_write_byte_data(priv->client, reg, val);
+ if (ret) {
+ dev_err(&priv->client->dev,
+ "register write to 0x%02X failed (error %d)",
+ reg, ret);
+ }
+ return ret;
+}
+
+/*
+ * Custom reset function for IS31FL3216 because it does not have a RESET
+ * register the way that the other IS31FL32xx chips do. We don't bother
+ * writing the GPIO and animation registers, because the registers we
+ * do write ensure those will have no effect.
+ */
+static int is31fl3216_reset(struct is31fl32xx_priv *priv)
+{
+ unsigned int i;
+ int ret;
+
+ ret = is31fl32xx_write(priv, IS31FL3216_CONFIG_REG,
+ IS31FL3216_CONFIG_SSD_ENABLE);
+ if (ret)
+ return ret;
+ for (i = 0; i < priv->cdef->channels; i++) {
+ ret = is31fl32xx_write(priv, priv->cdef->pwm_register_base+i,
+ 0x00);
+ if (ret)
+ return ret;
+ }
+ ret = is31fl32xx_write(priv, priv->cdef->pwm_update_reg, 0);
+ if (ret)
+ return ret;
+ ret = is31fl32xx_write(priv, IS31FL3216_LIGHTING_EFFECT_REG, 0x00);
+ if (ret)
+ return ret;
+ ret = is31fl32xx_write(priv, IS31FL3216_CHANNEL_CONFIG_REG, 0x00);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+/*
+ * Custom Software-Shutdown function for IS31FL3216 because it does not have
+ * a SHUTDOWN register the way that the other IS31FL32xx chips do.
+ * We don't bother doing a read/modify/write on the CONFIG register because
+ * we only ever use a value of '0' for the other fields in that register.
+ */
+static int is31fl3216_software_shutdown(struct is31fl32xx_priv *priv,
+ bool enable)
+{
+ u8 value = enable ? IS31FL3216_CONFIG_SSD_ENABLE :
+ IS31FL3216_CONFIG_SSD_DISABLE;
+
+ return is31fl32xx_write(priv, IS31FL3216_CONFIG_REG, value);
+}
+
+/*
+ * NOTE: A mutex is not needed in this function because:
+ * - All referenced data is read-only after probe()
+ * - The I2C core has a mutex on to protect the bus
+ * - There are no read/modify/write operations
+ * - Intervening operations between the write of the PWM register
+ * and the Update register are harmless.
+ *
+ * Example:
+ * PWM_REG_1 write 16
+ * UPDATE_REG write 0
+ * PWM_REG_2 write 128
+ * UPDATE_REG write 0
+ * vs:
+ * PWM_REG_1 write 16
+ * PWM_REG_2 write 128
+ * UPDATE_REG write 0
+ * UPDATE_REG write 0
+ * are equivalent. Poking the Update register merely applies all PWM
+ * register writes up to that point.
+ */
+static int is31fl32xx_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ const struct is31fl32xx_led_data *led_data =
+ container_of(led_cdev, struct is31fl32xx_led_data, cdev);
+ const struct is31fl32xx_chipdef *cdef = led_data->priv->cdef;
+ u8 pwm_register_offset;
+ int ret;
+
+ dev_dbg(led_cdev->dev, "%s: %d\n", __func__, brightness);
+
+ /* NOTE: led_data->channel is 1-based */
+ if (cdef->pwm_registers_reversed)
+ pwm_register_offset = cdef->channels - led_data->channel;
+ else
+ pwm_register_offset = led_data->channel - 1;
+
+ ret = is31fl32xx_write(led_data->priv,
+ cdef->pwm_register_base + pwm_register_offset,
+ brightness);
+ if (ret)
+ return ret;
+
+ return is31fl32xx_write(led_data->priv, cdef->pwm_update_reg, 0);
+}
+
+static int is31fl32xx_reset_regs(struct is31fl32xx_priv *priv)
+{
+ const struct is31fl32xx_chipdef *cdef = priv->cdef;
+ int ret;
+
+ if (cdef->reset_reg != IS31FL32XX_REG_NONE) {
+ ret = is31fl32xx_write(priv, cdef->reset_reg, 0);
+ if (ret)
+ return ret;
+ }
+
+ if (cdef->reset_func)
+ return cdef->reset_func(priv);
+
+ return 0;
+}
+
+static int is31fl32xx_software_shutdown(struct is31fl32xx_priv *priv,
+ bool enable)
+{
+ const struct is31fl32xx_chipdef *cdef = priv->cdef;
+ int ret;
+
+ if (cdef->shutdown_reg != IS31FL32XX_REG_NONE) {
+ u8 value = enable ? IS31FL32XX_SHUTDOWN_SSD_ENABLE :
+ IS31FL32XX_SHUTDOWN_SSD_DISABLE;
+ ret = is31fl32xx_write(priv, cdef->shutdown_reg, value);
+ if (ret)
+ return ret;
+ }
+
+ if (cdef->sw_shutdown_func)
+ return cdef->sw_shutdown_func(priv, enable);
+
+ return 0;
+}
+
+static int is31fl32xx_init_regs(struct is31fl32xx_priv *priv)
+{
+ const struct is31fl32xx_chipdef *cdef = priv->cdef;
+ int ret;
+
+ ret = is31fl32xx_reset_regs(priv);
+ if (ret)
+ return ret;
+
+ /*
+ * Set enable bit for all channels.
+ * We will control state with PWM registers alone.
+ */
+ if (cdef->led_control_register_base != IS31FL32XX_REG_NONE) {
+ u8 value =
+ GENMASK(cdef->enable_bits_per_led_control_register-1, 0);
+ u8 num_regs = cdef->channels /
+ cdef->enable_bits_per_led_control_register;
+ int i;
+
+ for (i = 0; i < num_regs; i++) {
+ ret = is31fl32xx_write(priv,
+ cdef->led_control_register_base+i,
+ value);
+ if (ret)
+ return ret;
+ }
+ }
+
+ ret = is31fl32xx_software_shutdown(priv, false);
+ if (ret)
+ return ret;
+
+ if (cdef->global_control_reg != IS31FL32XX_REG_NONE) {
+ ret = is31fl32xx_write(priv, cdef->global_control_reg, 0x00);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int is31fl32xx_parse_child_dt(const struct device *dev,
+ const struct device_node *child,
+ struct is31fl32xx_led_data *led_data)
+{
+ struct led_classdev *cdev = &led_data->cdev;
+ int ret = 0;
+ u32 reg;
+
+ ret = of_property_read_u32(child, "reg", &reg);
+ if (ret || reg < 1 || reg > led_data->priv->cdef->channels) {
+ dev_err(dev,
+ "Child node %pOF does not have a valid reg property\n",
+ child);
+ return -EINVAL;
+ }
+ led_data->channel = reg;
+
+ cdev->brightness_set_blocking = is31fl32xx_brightness_set;
+
+ return 0;
+}
+
+static struct is31fl32xx_led_data *is31fl32xx_find_led_data(
+ struct is31fl32xx_priv *priv,
+ u8 channel)
+{
+ size_t i;
+
+ for (i = 0; i < priv->num_leds; i++) {
+ if (priv->leds[i].channel == channel)
+ return &priv->leds[i];
+ }
+
+ return NULL;
+}
+
+static int is31fl32xx_parse_dt(struct device *dev,
+ struct is31fl32xx_priv *priv)
+{
+ struct device_node *child;
+ int ret = 0;
+
+ for_each_available_child_of_node(dev_of_node(dev), child) {
+ struct led_init_data init_data = {};
+ struct is31fl32xx_led_data *led_data =
+ &priv->leds[priv->num_leds];
+ const struct is31fl32xx_led_data *other_led_data;
+
+ led_data->priv = priv;
+
+ ret = is31fl32xx_parse_child_dt(dev, child, led_data);
+ if (ret)
+ goto err;
+
+ /* Detect if channel is already in use by another child */
+ other_led_data = is31fl32xx_find_led_data(priv,
+ led_data->channel);
+ if (other_led_data) {
+ dev_err(dev,
+ "Node %pOF 'reg' conflicts with another LED\n",
+ child);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ init_data.fwnode = of_fwnode_handle(child);
+
+ ret = devm_led_classdev_register_ext(dev, &led_data->cdev,
+ &init_data);
+ if (ret) {
+ dev_err(dev, "Failed to register LED for %pOF: %d\n",
+ child, ret);
+ goto err;
+ }
+
+ priv->num_leds++;
+ }
+
+ return 0;
+
+err:
+ of_node_put(child);
+ return ret;
+}
+
+static const struct of_device_id of_is31fl32xx_match[] = {
+ { .compatible = "issi,is31fl3236", .data = &is31fl3236_cdef, },
+ { .compatible = "issi,is31fl3235", .data = &is31fl3235_cdef, },
+ { .compatible = "issi,is31fl3218", .data = &is31fl3218_cdef, },
+ { .compatible = "si-en,sn3218", .data = &is31fl3218_cdef, },
+ { .compatible = "issi,is31fl3216", .data = &is31fl3216_cdef, },
+ { .compatible = "si-en,sn3216", .data = &is31fl3216_cdef, },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, of_is31fl32xx_match);
+
+static int is31fl32xx_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ const struct is31fl32xx_chipdef *cdef;
+ struct device *dev = &client->dev;
+ struct is31fl32xx_priv *priv;
+ int count;
+ int ret = 0;
+
+ cdef = device_get_match_data(dev);
+
+ count = of_get_available_child_count(dev_of_node(dev));
+ if (!count)
+ return -EINVAL;
+
+ priv = devm_kzalloc(dev, struct_size(priv, leds, count),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->client = client;
+ priv->cdef = cdef;
+ i2c_set_clientdata(client, priv);
+
+ ret = is31fl32xx_init_regs(priv);
+ if (ret)
+ return ret;
+
+ ret = is31fl32xx_parse_dt(dev, priv);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void is31fl32xx_remove(struct i2c_client *client)
+{
+ struct is31fl32xx_priv *priv = i2c_get_clientdata(client);
+ int ret;
+
+ ret = is31fl32xx_reset_regs(priv);
+ if (ret)
+ dev_err(&client->dev, "Failed to reset registers on removal (%pe)\n",
+ ERR_PTR(ret));
+}
+
+/*
+ * i2c-core (and modalias) requires that id_table be properly filled,
+ * even though it is not used for DeviceTree based instantiation.
+ */
+static const struct i2c_device_id is31fl32xx_id[] = {
+ { "is31fl3236" },
+ { "is31fl3235" },
+ { "is31fl3218" },
+ { "sn3218" },
+ { "is31fl3216" },
+ { "sn3216" },
+ {},
+};
+
+MODULE_DEVICE_TABLE(i2c, is31fl32xx_id);
+
+static struct i2c_driver is31fl32xx_driver = {
+ .driver = {
+ .name = "is31fl32xx",
+ .of_match_table = of_is31fl32xx_match,
+ },
+ .probe = is31fl32xx_probe,
+ .remove = is31fl32xx_remove,
+ .id_table = is31fl32xx_id,
+};
+
+module_i2c_driver(is31fl32xx_driver);
+
+MODULE_AUTHOR("David Rivshin <drivshin@allworx.com>");
+MODULE_DESCRIPTION("ISSI IS31FL32xx LED driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c
new file mode 100644
index 000000000..ba906c253
--- /dev/null
+++ b/drivers/leds/leds-lm3530.c
@@ -0,0 +1,500 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2011 ST-Ericsson SA.
+ * Copyright (C) 2009 Motorola, Inc.
+ *
+ * Simple driver for National Semiconductor LM3530 Backlight driver chip
+ *
+ * Author: Shreshtha Kumar SAHU <shreshthakumar.sahu@stericsson.com>
+ * based on leds-lm3530.c by Dan Murphy <D.Murphy@motorola.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/led-lm3530.h>
+#include <linux/types.h>
+#include <linux/regulator/consumer.h>
+#include <linux/module.h>
+
+#define LM3530_LED_DEV "lcd-backlight"
+#define LM3530_NAME "lm3530-led"
+
+#define LM3530_GEN_CONFIG 0x10
+#define LM3530_ALS_CONFIG 0x20
+#define LM3530_BRT_RAMP_RATE 0x30
+#define LM3530_ALS_IMP_SELECT 0x41
+#define LM3530_BRT_CTRL_REG 0xA0
+#define LM3530_ALS_ZB0_REG 0x60
+#define LM3530_ALS_ZB1_REG 0x61
+#define LM3530_ALS_ZB2_REG 0x62
+#define LM3530_ALS_ZB3_REG 0x63
+#define LM3530_ALS_Z0T_REG 0x70
+#define LM3530_ALS_Z1T_REG 0x71
+#define LM3530_ALS_Z2T_REG 0x72
+#define LM3530_ALS_Z3T_REG 0x73
+#define LM3530_ALS_Z4T_REG 0x74
+#define LM3530_REG_MAX 14
+
+/* General Control Register */
+#define LM3530_EN_I2C_SHIFT (0)
+#define LM3530_RAMP_LAW_SHIFT (1)
+#define LM3530_MAX_CURR_SHIFT (2)
+#define LM3530_EN_PWM_SHIFT (5)
+#define LM3530_PWM_POL_SHIFT (6)
+#define LM3530_EN_PWM_SIMPLE_SHIFT (7)
+
+#define LM3530_ENABLE_I2C (1 << LM3530_EN_I2C_SHIFT)
+#define LM3530_ENABLE_PWM (1 << LM3530_EN_PWM_SHIFT)
+#define LM3530_POL_LOW (1 << LM3530_PWM_POL_SHIFT)
+#define LM3530_ENABLE_PWM_SIMPLE (1 << LM3530_EN_PWM_SIMPLE_SHIFT)
+
+/* ALS Config Register Options */
+#define LM3530_ALS_AVG_TIME_SHIFT (0)
+#define LM3530_EN_ALS_SHIFT (3)
+#define LM3530_ALS_SEL_SHIFT (5)
+
+#define LM3530_ENABLE_ALS (3 << LM3530_EN_ALS_SHIFT)
+
+/* Brightness Ramp Rate Register */
+#define LM3530_BRT_RAMP_FALL_SHIFT (0)
+#define LM3530_BRT_RAMP_RISE_SHIFT (3)
+
+/* ALS Resistor Select */
+#define LM3530_ALS1_IMP_SHIFT (0)
+#define LM3530_ALS2_IMP_SHIFT (4)
+
+/* Zone Boundary Register defaults */
+#define LM3530_ALS_ZB_MAX (4)
+#define LM3530_ALS_WINDOW_mV (1000)
+#define LM3530_ALS_OFFSET_mV (4)
+
+/* Zone Target Register defaults */
+#define LM3530_DEF_ZT_0 (0x7F)
+#define LM3530_DEF_ZT_1 (0x66)
+#define LM3530_DEF_ZT_2 (0x4C)
+#define LM3530_DEF_ZT_3 (0x33)
+#define LM3530_DEF_ZT_4 (0x19)
+
+/* 7 bits are used for the brightness : LM3530_BRT_CTRL_REG */
+#define MAX_BRIGHTNESS (127)
+
+struct lm3530_mode_map {
+ const char *mode;
+ enum lm3530_mode mode_val;
+};
+
+static struct lm3530_mode_map mode_map[] = {
+ { "man", LM3530_BL_MODE_MANUAL },
+ { "als", LM3530_BL_MODE_ALS },
+ { "pwm", LM3530_BL_MODE_PWM },
+};
+
+/**
+ * struct lm3530_data
+ * @led_dev: led class device
+ * @client: i2c client
+ * @pdata: LM3530 platform data
+ * @mode: mode of operation - manual, ALS, PWM
+ * @regulator: regulator
+ * @brightness: previous brightness value
+ * @enable: regulator is enabled
+ */
+struct lm3530_data {
+ struct led_classdev led_dev;
+ struct i2c_client *client;
+ struct lm3530_platform_data *pdata;
+ enum lm3530_mode mode;
+ struct regulator *regulator;
+ enum led_brightness brightness;
+ bool enable;
+};
+
+/*
+ * struct lm3530_als_data
+ * @config : value of ALS configuration register
+ * @imp_sel : value of ALS resistor select register
+ * @zone : values of ALS ZB(Zone Boundary) registers
+ */
+struct lm3530_als_data {
+ u8 config;
+ u8 imp_sel;
+ u8 zones[LM3530_ALS_ZB_MAX];
+};
+
+static const u8 lm3530_reg[LM3530_REG_MAX] = {
+ LM3530_GEN_CONFIG,
+ LM3530_ALS_CONFIG,
+ LM3530_BRT_RAMP_RATE,
+ LM3530_ALS_IMP_SELECT,
+ LM3530_BRT_CTRL_REG,
+ LM3530_ALS_ZB0_REG,
+ LM3530_ALS_ZB1_REG,
+ LM3530_ALS_ZB2_REG,
+ LM3530_ALS_ZB3_REG,
+ LM3530_ALS_Z0T_REG,
+ LM3530_ALS_Z1T_REG,
+ LM3530_ALS_Z2T_REG,
+ LM3530_ALS_Z3T_REG,
+ LM3530_ALS_Z4T_REG,
+};
+
+static int lm3530_get_mode_from_str(const char *str)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mode_map); i++)
+ if (sysfs_streq(str, mode_map[i].mode))
+ return mode_map[i].mode_val;
+
+ return -EINVAL;
+}
+
+static void lm3530_als_configure(struct lm3530_platform_data *pdata,
+ struct lm3530_als_data *als)
+{
+ int i;
+ u32 als_vmin, als_vmax, als_vstep;
+
+ if (pdata->als_vmax == 0) {
+ pdata->als_vmin = 0;
+ pdata->als_vmax = LM3530_ALS_WINDOW_mV;
+ }
+
+ als_vmin = pdata->als_vmin;
+ als_vmax = pdata->als_vmax;
+
+ if ((als_vmax - als_vmin) > LM3530_ALS_WINDOW_mV)
+ pdata->als_vmax = als_vmax = als_vmin + LM3530_ALS_WINDOW_mV;
+
+ /* n zone boundary makes n+1 zones */
+ als_vstep = (als_vmax - als_vmin) / (LM3530_ALS_ZB_MAX + 1);
+
+ for (i = 0; i < LM3530_ALS_ZB_MAX; i++)
+ als->zones[i] = (((als_vmin + LM3530_ALS_OFFSET_mV) +
+ als_vstep + (i * als_vstep)) * LED_FULL) / 1000;
+
+ als->config =
+ (pdata->als_avrg_time << LM3530_ALS_AVG_TIME_SHIFT) |
+ (LM3530_ENABLE_ALS) |
+ (pdata->als_input_mode << LM3530_ALS_SEL_SHIFT);
+
+ als->imp_sel =
+ (pdata->als1_resistor_sel << LM3530_ALS1_IMP_SHIFT) |
+ (pdata->als2_resistor_sel << LM3530_ALS2_IMP_SHIFT);
+}
+
+static int lm3530_led_enable(struct lm3530_data *drvdata)
+{
+ int ret;
+
+ if (drvdata->enable)
+ return 0;
+
+ ret = regulator_enable(drvdata->regulator);
+ if (ret) {
+ dev_err(drvdata->led_dev.dev, "Failed to enable vin:%d\n", ret);
+ return ret;
+ }
+
+ drvdata->enable = true;
+ return 0;
+}
+
+static void lm3530_led_disable(struct lm3530_data *drvdata)
+{
+ int ret;
+
+ if (!drvdata->enable)
+ return;
+
+ ret = regulator_disable(drvdata->regulator);
+ if (ret) {
+ dev_err(drvdata->led_dev.dev, "Failed to disable vin:%d\n",
+ ret);
+ return;
+ }
+
+ drvdata->enable = false;
+}
+
+static int lm3530_init_registers(struct lm3530_data *drvdata)
+{
+ int ret = 0;
+ int i;
+ u8 gen_config;
+ u8 brt_ramp;
+ u8 brightness;
+ u8 reg_val[LM3530_REG_MAX];
+ struct lm3530_platform_data *pdata = drvdata->pdata;
+ struct i2c_client *client = drvdata->client;
+ struct lm3530_pwm_data *pwm = &pdata->pwm_data;
+ struct lm3530_als_data als;
+
+ memset(&als, 0, sizeof(struct lm3530_als_data));
+
+ gen_config = (pdata->brt_ramp_law << LM3530_RAMP_LAW_SHIFT) |
+ ((pdata->max_current & 7) << LM3530_MAX_CURR_SHIFT);
+
+ switch (drvdata->mode) {
+ case LM3530_BL_MODE_MANUAL:
+ gen_config |= LM3530_ENABLE_I2C;
+ break;
+ case LM3530_BL_MODE_ALS:
+ gen_config |= LM3530_ENABLE_I2C;
+ lm3530_als_configure(pdata, &als);
+ break;
+ case LM3530_BL_MODE_PWM:
+ gen_config |= LM3530_ENABLE_PWM | LM3530_ENABLE_PWM_SIMPLE |
+ (pdata->pwm_pol_hi << LM3530_PWM_POL_SHIFT);
+ break;
+ }
+
+ brt_ramp = (pdata->brt_ramp_fall << LM3530_BRT_RAMP_FALL_SHIFT) |
+ (pdata->brt_ramp_rise << LM3530_BRT_RAMP_RISE_SHIFT);
+
+ if (drvdata->brightness)
+ brightness = drvdata->brightness;
+ else
+ brightness = drvdata->brightness = pdata->brt_val;
+
+ if (brightness > drvdata->led_dev.max_brightness)
+ brightness = drvdata->led_dev.max_brightness;
+
+ reg_val[0] = gen_config; /* LM3530_GEN_CONFIG */
+ reg_val[1] = als.config; /* LM3530_ALS_CONFIG */
+ reg_val[2] = brt_ramp; /* LM3530_BRT_RAMP_RATE */
+ reg_val[3] = als.imp_sel; /* LM3530_ALS_IMP_SELECT */
+ reg_val[4] = brightness; /* LM3530_BRT_CTRL_REG */
+ reg_val[5] = als.zones[0]; /* LM3530_ALS_ZB0_REG */
+ reg_val[6] = als.zones[1]; /* LM3530_ALS_ZB1_REG */
+ reg_val[7] = als.zones[2]; /* LM3530_ALS_ZB2_REG */
+ reg_val[8] = als.zones[3]; /* LM3530_ALS_ZB3_REG */
+ reg_val[9] = LM3530_DEF_ZT_0; /* LM3530_ALS_Z0T_REG */
+ reg_val[10] = LM3530_DEF_ZT_1; /* LM3530_ALS_Z1T_REG */
+ reg_val[11] = LM3530_DEF_ZT_2; /* LM3530_ALS_Z2T_REG */
+ reg_val[12] = LM3530_DEF_ZT_3; /* LM3530_ALS_Z3T_REG */
+ reg_val[13] = LM3530_DEF_ZT_4; /* LM3530_ALS_Z4T_REG */
+
+ ret = lm3530_led_enable(drvdata);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < LM3530_REG_MAX; i++) {
+ /* do not update brightness register when pwm mode */
+ if (lm3530_reg[i] == LM3530_BRT_CTRL_REG &&
+ drvdata->mode == LM3530_BL_MODE_PWM) {
+ if (pwm->pwm_set_intensity)
+ pwm->pwm_set_intensity(reg_val[i],
+ drvdata->led_dev.max_brightness);
+ continue;
+ }
+
+ ret = i2c_smbus_write_byte_data(client,
+ lm3530_reg[i], reg_val[i]);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+static void lm3530_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brt_val)
+{
+ int err;
+ struct lm3530_data *drvdata =
+ container_of(led_cdev, struct lm3530_data, led_dev);
+ struct lm3530_platform_data *pdata = drvdata->pdata;
+ struct lm3530_pwm_data *pwm = &pdata->pwm_data;
+ u8 max_brightness = led_cdev->max_brightness;
+
+ switch (drvdata->mode) {
+ case LM3530_BL_MODE_MANUAL:
+
+ if (!drvdata->enable) {
+ err = lm3530_init_registers(drvdata);
+ if (err) {
+ dev_err(&drvdata->client->dev,
+ "Register Init failed: %d\n", err);
+ break;
+ }
+ }
+
+ /* set the brightness in brightness control register*/
+ err = i2c_smbus_write_byte_data(drvdata->client,
+ LM3530_BRT_CTRL_REG, brt_val);
+ if (err)
+ dev_err(&drvdata->client->dev,
+ "Unable to set brightness: %d\n", err);
+ else
+ drvdata->brightness = brt_val;
+
+ if (brt_val == 0)
+ lm3530_led_disable(drvdata);
+ break;
+ case LM3530_BL_MODE_ALS:
+ break;
+ case LM3530_BL_MODE_PWM:
+ if (pwm->pwm_set_intensity)
+ pwm->pwm_set_intensity(brt_val, max_brightness);
+ break;
+ default:
+ break;
+ }
+}
+
+static ssize_t mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3530_data *drvdata;
+ int i, len = 0;
+
+ drvdata = container_of(led_cdev, struct lm3530_data, led_dev);
+ for (i = 0; i < ARRAY_SIZE(mode_map); i++)
+ if (drvdata->mode == mode_map[i].mode_val)
+ len += sprintf(buf + len, "[%s] ", mode_map[i].mode);
+ else
+ len += sprintf(buf + len, "%s ", mode_map[i].mode);
+
+ len += sprintf(buf + len, "\n");
+
+ return len;
+}
+
+static ssize_t mode_store(struct device *dev, struct device_attribute
+ *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3530_data *drvdata;
+ struct lm3530_pwm_data *pwm;
+ u8 max_brightness;
+ int mode, err;
+
+ drvdata = container_of(led_cdev, struct lm3530_data, led_dev);
+ pwm = &drvdata->pdata->pwm_data;
+ max_brightness = led_cdev->max_brightness;
+ mode = lm3530_get_mode_from_str(buf);
+ if (mode < 0) {
+ dev_err(dev, "Invalid mode\n");
+ return mode;
+ }
+
+ drvdata->mode = mode;
+
+ /* set pwm to low if unnecessary */
+ if (mode != LM3530_BL_MODE_PWM && pwm->pwm_set_intensity)
+ pwm->pwm_set_intensity(0, max_brightness);
+
+ err = lm3530_init_registers(drvdata);
+ if (err) {
+ dev_err(dev, "Setting %s Mode failed :%d\n", buf, err);
+ return err;
+ }
+
+ return sizeof(drvdata->mode);
+}
+static DEVICE_ATTR_RW(mode);
+
+static struct attribute *lm3530_attrs[] = {
+ &dev_attr_mode.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(lm3530);
+
+static int lm3530_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lm3530_platform_data *pdata = dev_get_platdata(&client->dev);
+ struct lm3530_data *drvdata;
+ int err = 0;
+
+ if (pdata == NULL) {
+ dev_err(&client->dev, "platform data required\n");
+ return -ENODEV;
+ }
+
+ /* BL mode */
+ if (pdata->mode > LM3530_BL_MODE_PWM) {
+ dev_err(&client->dev, "Illegal Mode request\n");
+ return -EINVAL;
+ }
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "I2C_FUNC_I2C not supported\n");
+ return -EIO;
+ }
+
+ drvdata = devm_kzalloc(&client->dev, sizeof(struct lm3530_data),
+ GFP_KERNEL);
+ if (drvdata == NULL)
+ return -ENOMEM;
+
+ drvdata->mode = pdata->mode;
+ drvdata->client = client;
+ drvdata->pdata = pdata;
+ drvdata->brightness = LED_OFF;
+ drvdata->enable = false;
+ drvdata->led_dev.name = LM3530_LED_DEV;
+ drvdata->led_dev.brightness_set = lm3530_brightness_set;
+ drvdata->led_dev.max_brightness = MAX_BRIGHTNESS;
+ drvdata->led_dev.groups = lm3530_groups;
+
+ i2c_set_clientdata(client, drvdata);
+
+ drvdata->regulator = devm_regulator_get(&client->dev, "vin");
+ if (IS_ERR(drvdata->regulator)) {
+ dev_err(&client->dev, "regulator get failed\n");
+ err = PTR_ERR(drvdata->regulator);
+ drvdata->regulator = NULL;
+ return err;
+ }
+
+ if (drvdata->pdata->brt_val) {
+ err = lm3530_init_registers(drvdata);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "Register Init failed: %d\n", err);
+ return err;
+ }
+ }
+ err = led_classdev_register(&client->dev, &drvdata->led_dev);
+ if (err < 0) {
+ dev_err(&client->dev, "Register led class failed: %d\n", err);
+ return err;
+ }
+
+ return 0;
+}
+
+static void lm3530_remove(struct i2c_client *client)
+{
+ struct lm3530_data *drvdata = i2c_get_clientdata(client);
+
+ lm3530_led_disable(drvdata);
+ led_classdev_unregister(&drvdata->led_dev);
+}
+
+static const struct i2c_device_id lm3530_id[] = {
+ {LM3530_NAME, 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, lm3530_id);
+
+static struct i2c_driver lm3530_i2c_driver = {
+ .probe = lm3530_probe,
+ .remove = lm3530_remove,
+ .id_table = lm3530_id,
+ .driver = {
+ .name = LM3530_NAME,
+ },
+};
+
+module_i2c_driver(lm3530_i2c_driver);
+
+MODULE_DESCRIPTION("Back Light driver for LM3530");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Shreshtha Kumar SAHU <shreshthakumar.sahu@stericsson.com>");
diff --git a/drivers/leds/leds-lm3532.c b/drivers/leds/leds-lm3532.c
new file mode 100644
index 000000000..db64d44bc
--- /dev/null
+++ b/drivers/leds/leds-lm3532.c
@@ -0,0 +1,742 @@
+// SPDX-License-Identifier: GPL-2.0
+// TI LM3532 LED driver
+// Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com/
+// https://www.ti.com/lit/ds/symlink/lm3532.pdf
+
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+#include <linux/regulator/consumer.h>
+#include <linux/module.h>
+#include <uapi/linux/uleds.h>
+#include <linux/gpio/consumer.h>
+
+#define LM3532_NAME "lm3532-led"
+#define LM3532_BL_MODE_MANUAL 0x00
+#define LM3532_BL_MODE_ALS 0x01
+
+#define LM3532_REG_OUTPUT_CFG 0x10
+#define LM3532_REG_STARTSHUT_RAMP 0x11
+#define LM3532_REG_RT_RAMP 0x12
+#define LM3532_REG_PWM_A_CFG 0x13
+#define LM3532_REG_PWM_B_CFG 0x14
+#define LM3532_REG_PWM_C_CFG 0x15
+#define LM3532_REG_ZONE_CFG_A 0x16
+#define LM3532_REG_CTRL_A_FS_CURR 0x17
+#define LM3532_REG_ZONE_CFG_B 0x18
+#define LM3532_REG_CTRL_B_FS_CURR 0x19
+#define LM3532_REG_ZONE_CFG_C 0x1a
+#define LM3532_REG_CTRL_C_FS_CURR 0x1b
+#define LM3532_REG_ENABLE 0x1d
+#define LM3532_ALS_CONFIG 0x23
+#define LM3532_REG_ZN_0_HI 0x60
+#define LM3532_REG_ZN_0_LO 0x61
+#define LM3532_REG_ZN_1_HI 0x62
+#define LM3532_REG_ZN_1_LO 0x63
+#define LM3532_REG_ZN_2_HI 0x64
+#define LM3532_REG_ZN_2_LO 0x65
+#define LM3532_REG_ZN_3_HI 0x66
+#define LM3532_REG_ZN_3_LO 0x67
+#define LM3532_REG_ZONE_TRGT_A 0x70
+#define LM3532_REG_ZONE_TRGT_B 0x75
+#define LM3532_REG_ZONE_TRGT_C 0x7a
+#define LM3532_REG_MAX 0x7e
+
+/* Control Enable */
+#define LM3532_CTRL_A_ENABLE BIT(0)
+#define LM3532_CTRL_B_ENABLE BIT(1)
+#define LM3532_CTRL_C_ENABLE BIT(2)
+
+/* PWM Zone Control */
+#define LM3532_PWM_ZONE_MASK 0x7c
+#define LM3532_PWM_ZONE_0_EN BIT(2)
+#define LM3532_PWM_ZONE_1_EN BIT(3)
+#define LM3532_PWM_ZONE_2_EN BIT(4)
+#define LM3532_PWM_ZONE_3_EN BIT(5)
+#define LM3532_PWM_ZONE_4_EN BIT(6)
+
+/* Brightness Configuration */
+#define LM3532_I2C_CTRL BIT(0)
+#define LM3532_ALS_CTRL 0
+#define LM3532_LINEAR_MAP BIT(1)
+#define LM3532_ZONE_MASK (BIT(2) | BIT(3) | BIT(4))
+#define LM3532_ZONE_0 0
+#define LM3532_ZONE_1 BIT(2)
+#define LM3532_ZONE_2 BIT(3)
+#define LM3532_ZONE_3 (BIT(2) | BIT(3))
+#define LM3532_ZONE_4 BIT(4)
+
+#define LM3532_ENABLE_ALS BIT(3)
+#define LM3532_ALS_SEL_SHIFT 6
+
+/* Zone Boundary Register */
+#define LM3532_ALS_WINDOW_mV 2000
+#define LM3532_ALS_ZB_MAX 4
+#define LM3532_ALS_OFFSET_mV 2
+
+#define LM3532_CONTROL_A 0
+#define LM3532_CONTROL_B 1
+#define LM3532_CONTROL_C 2
+#define LM3532_MAX_CONTROL_BANKS 3
+#define LM3532_MAX_LED_STRINGS 3
+
+#define LM3532_OUTPUT_CFG_MASK 0x3
+#define LM3532_BRT_VAL_ADJUST 8
+#define LM3532_RAMP_DOWN_SHIFT 3
+
+#define LM3532_NUM_RAMP_VALS 8
+#define LM3532_NUM_AVG_VALS 8
+#define LM3532_NUM_IMP_VALS 32
+
+#define LM3532_FS_CURR_MIN 5000
+#define LM3532_FS_CURR_MAX 29800
+#define LM3532_FS_CURR_STEP 800
+
+/*
+ * struct lm3532_als_data
+ * @config: value of ALS configuration register
+ * @als1_imp_sel: value of ALS1 resistor select register
+ * @als2_imp_sel: value of ALS2 resistor select register
+ * @als_avrg_time: ALS averaging time
+ * @als_input_mode: ALS input mode for brightness control
+ * @als_vmin: Minimum ALS voltage
+ * @als_vmax: Maximum ALS voltage
+ * @zone_lo: values of ALS lo ZB(Zone Boundary) registers
+ * @zone_hi: values of ALS hi ZB(Zone Boundary) registers
+ */
+struct lm3532_als_data {
+ u8 config;
+ u8 als1_imp_sel;
+ u8 als2_imp_sel;
+ u8 als_avrg_time;
+ u8 als_input_mode;
+ u32 als_vmin;
+ u32 als_vmax;
+ u8 zones_lo[LM3532_ALS_ZB_MAX];
+ u8 zones_hi[LM3532_ALS_ZB_MAX];
+};
+
+/**
+ * struct lm3532_led
+ * @led_dev: led class device
+ * @priv: Pointer the device data structure
+ * @control_bank: Control bank the LED is associated to
+ * @mode: Mode of the LED string
+ * @ctrl_brt_pointer: Zone target register that controls the sink
+ * @num_leds: Number of LED strings are supported in this array
+ * @full_scale_current: The full-scale current setting for the current sink.
+ * @led_strings: The LED strings supported in this array
+ * @enabled: Enabled status
+ */
+struct lm3532_led {
+ struct led_classdev led_dev;
+ struct lm3532_data *priv;
+
+ int control_bank;
+ int mode;
+ int ctrl_brt_pointer;
+ int num_leds;
+ int full_scale_current;
+ unsigned int enabled:1;
+ u32 led_strings[LM3532_MAX_CONTROL_BANKS];
+};
+
+/**
+ * struct lm3532_data
+ * @enable_gpio: Hardware enable gpio
+ * @regulator: regulator
+ * @client: i2c client
+ * @regmap: Devices register map
+ * @dev: Pointer to the devices device struct
+ * @lock: Lock for reading/writing the device
+ * @als_data: Pointer to the als data struct
+ * @runtime_ramp_up: Runtime ramp up setting
+ * @runtime_ramp_down: Runtime ramp down setting
+ * @leds: Array of LED strings
+ */
+struct lm3532_data {
+ struct gpio_desc *enable_gpio;
+ struct regulator *regulator;
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct device *dev;
+ struct mutex lock;
+
+ struct lm3532_als_data *als_data;
+
+ u32 runtime_ramp_up;
+ u32 runtime_ramp_down;
+
+ struct lm3532_led leds[];
+};
+
+static const struct reg_default lm3532_reg_defs[] = {
+ {LM3532_REG_OUTPUT_CFG, 0xe4},
+ {LM3532_REG_STARTSHUT_RAMP, 0xc0},
+ {LM3532_REG_RT_RAMP, 0xc0},
+ {LM3532_REG_PWM_A_CFG, 0x82},
+ {LM3532_REG_PWM_B_CFG, 0x82},
+ {LM3532_REG_PWM_C_CFG, 0x82},
+ {LM3532_REG_ZONE_CFG_A, 0xf1},
+ {LM3532_REG_CTRL_A_FS_CURR, 0xf3},
+ {LM3532_REG_ZONE_CFG_B, 0xf1},
+ {LM3532_REG_CTRL_B_FS_CURR, 0xf3},
+ {LM3532_REG_ZONE_CFG_C, 0xf1},
+ {LM3532_REG_CTRL_C_FS_CURR, 0xf3},
+ {LM3532_REG_ENABLE, 0xf8},
+ {LM3532_ALS_CONFIG, 0x44},
+ {LM3532_REG_ZN_0_HI, 0x35},
+ {LM3532_REG_ZN_0_LO, 0x33},
+ {LM3532_REG_ZN_1_HI, 0x6a},
+ {LM3532_REG_ZN_1_LO, 0x66},
+ {LM3532_REG_ZN_2_HI, 0xa1},
+ {LM3532_REG_ZN_2_LO, 0x99},
+ {LM3532_REG_ZN_3_HI, 0xdc},
+ {LM3532_REG_ZN_3_LO, 0xcc},
+};
+
+static const struct regmap_config lm3532_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LM3532_REG_MAX,
+ .reg_defaults = lm3532_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(lm3532_reg_defs),
+ .cache_type = REGCACHE_FLAT,
+};
+
+static const int als_imp_table[LM3532_NUM_IMP_VALS] = {37000, 18500, 12330,
+ 92500, 7400, 6170, 5290,
+ 4630, 4110, 3700, 3360,
+ 3080, 2850, 2640, 2440,
+ 2310, 2180, 2060, 1950,
+ 1850, 1760, 1680, 1610,
+ 1540, 1480, 1420, 1370,
+ 1320, 1280, 1230, 1190};
+static int lm3532_get_als_imp_index(int als_imped)
+{
+ int i;
+
+ if (als_imped > als_imp_table[1])
+ return 0;
+
+ if (als_imped < als_imp_table[LM3532_NUM_IMP_VALS - 1])
+ return LM3532_NUM_IMP_VALS - 1;
+
+ for (i = 1; i < LM3532_NUM_IMP_VALS; i++) {
+ if (als_imped == als_imp_table[i])
+ return i;
+
+ /* Find an approximate index by looking up the table */
+ if (als_imped < als_imp_table[i - 1] &&
+ als_imped > als_imp_table[i]) {
+ if (als_imped - als_imp_table[i - 1] <
+ als_imp_table[i] - als_imped)
+ return i + 1;
+ else
+ return i;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int lm3532_get_index(const int table[], int size, int value)
+{
+ int i;
+
+ for (i = 1; i < size; i++) {
+ if (value == table[i])
+ return i;
+
+ /* Find an approximate index by looking up the table */
+ if (value > table[i - 1] &&
+ value < table[i]) {
+ if (value - table[i - 1] < table[i] - value)
+ return i - 1;
+ else
+ return i;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static const int als_avrg_table[LM3532_NUM_AVG_VALS] = {17920, 35840, 71680,
+ 1433360, 286720, 573440,
+ 1146880, 2293760};
+static int lm3532_get_als_avg_index(int avg_time)
+{
+ if (avg_time <= als_avrg_table[0])
+ return 0;
+
+ if (avg_time > als_avrg_table[LM3532_NUM_AVG_VALS - 1])
+ return LM3532_NUM_AVG_VALS - 1;
+
+ return lm3532_get_index(&als_avrg_table[0], LM3532_NUM_AVG_VALS,
+ avg_time);
+}
+
+static const int ramp_table[LM3532_NUM_RAMP_VALS] = { 8, 1024, 2048, 4096, 8192,
+ 16384, 32768, 65536};
+static int lm3532_get_ramp_index(int ramp_time)
+{
+ if (ramp_time <= ramp_table[0])
+ return 0;
+
+ if (ramp_time > ramp_table[LM3532_NUM_RAMP_VALS - 1])
+ return LM3532_NUM_RAMP_VALS - 1;
+
+ return lm3532_get_index(&ramp_table[0], LM3532_NUM_RAMP_VALS,
+ ramp_time);
+}
+
+/* Caller must take care of locking */
+static int lm3532_led_enable(struct lm3532_led *led_data)
+{
+ int ctrl_en_val = BIT(led_data->control_bank);
+ int ret;
+
+ if (led_data->enabled)
+ return 0;
+
+ ret = regmap_update_bits(led_data->priv->regmap, LM3532_REG_ENABLE,
+ ctrl_en_val, ctrl_en_val);
+ if (ret) {
+ dev_err(led_data->priv->dev, "Failed to set ctrl:%d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_enable(led_data->priv->regulator);
+ if (ret < 0)
+ return ret;
+
+ led_data->enabled = 1;
+
+ return 0;
+}
+
+/* Caller must take care of locking */
+static int lm3532_led_disable(struct lm3532_led *led_data)
+{
+ int ctrl_en_val = BIT(led_data->control_bank);
+ int ret;
+
+ if (!led_data->enabled)
+ return 0;
+
+ ret = regmap_update_bits(led_data->priv->regmap, LM3532_REG_ENABLE,
+ ctrl_en_val, 0);
+ if (ret) {
+ dev_err(led_data->priv->dev, "Failed to set ctrl:%d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_disable(led_data->priv->regulator);
+ if (ret < 0)
+ return ret;
+
+ led_data->enabled = 0;
+
+ return 0;
+}
+
+static int lm3532_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brt_val)
+{
+ struct lm3532_led *led =
+ container_of(led_cdev, struct lm3532_led, led_dev);
+ u8 brightness_reg;
+ int ret;
+
+ mutex_lock(&led->priv->lock);
+
+ if (led->mode == LM3532_ALS_CTRL) {
+ if (brt_val > LED_OFF)
+ ret = lm3532_led_enable(led);
+ else
+ ret = lm3532_led_disable(led);
+
+ goto unlock;
+ }
+
+ if (brt_val == LED_OFF) {
+ ret = lm3532_led_disable(led);
+ goto unlock;
+ }
+
+ ret = lm3532_led_enable(led);
+ if (ret)
+ goto unlock;
+
+ brightness_reg = LM3532_REG_ZONE_TRGT_A + led->control_bank * 5 +
+ (led->ctrl_brt_pointer >> 2);
+
+ ret = regmap_write(led->priv->regmap, brightness_reg, brt_val);
+
+unlock:
+ mutex_unlock(&led->priv->lock);
+ return ret;
+}
+
+static int lm3532_init_registers(struct lm3532_led *led)
+{
+ struct lm3532_data *drvdata = led->priv;
+ unsigned int runtime_ramp_val;
+ unsigned int output_cfg_val = 0;
+ unsigned int output_cfg_shift = 0;
+ unsigned int output_cfg_mask = 0;
+ unsigned int brightness_config_reg;
+ unsigned int brightness_config_val;
+ int fs_current_reg;
+ int fs_current_val;
+ int ret, i;
+
+ if (drvdata->enable_gpio)
+ gpiod_direction_output(drvdata->enable_gpio, 1);
+
+ brightness_config_reg = LM3532_REG_ZONE_CFG_A + led->control_bank * 2;
+ /*
+ * This could be hard coded to the default value but the control
+ * brightness register may have changed during boot.
+ */
+ ret = regmap_read(drvdata->regmap, brightness_config_reg,
+ &led->ctrl_brt_pointer);
+ if (ret)
+ return ret;
+
+ led->ctrl_brt_pointer &= LM3532_ZONE_MASK;
+ brightness_config_val = led->ctrl_brt_pointer | led->mode;
+ ret = regmap_write(drvdata->regmap, brightness_config_reg,
+ brightness_config_val);
+ if (ret)
+ return ret;
+
+ if (led->full_scale_current) {
+ fs_current_reg = LM3532_REG_CTRL_A_FS_CURR + led->control_bank * 2;
+ fs_current_val = (led->full_scale_current - LM3532_FS_CURR_MIN) /
+ LM3532_FS_CURR_STEP;
+
+ ret = regmap_write(drvdata->regmap, fs_current_reg,
+ fs_current_val);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < led->num_leds; i++) {
+ output_cfg_shift = led->led_strings[i] * 2;
+ output_cfg_val |= (led->control_bank << output_cfg_shift);
+ output_cfg_mask |= LM3532_OUTPUT_CFG_MASK << output_cfg_shift;
+ }
+
+ ret = regmap_update_bits(drvdata->regmap, LM3532_REG_OUTPUT_CFG,
+ output_cfg_mask, output_cfg_val);
+ if (ret)
+ return ret;
+
+ runtime_ramp_val = drvdata->runtime_ramp_up |
+ (drvdata->runtime_ramp_down << LM3532_RAMP_DOWN_SHIFT);
+
+ return regmap_write(drvdata->regmap, LM3532_REG_RT_RAMP,
+ runtime_ramp_val);
+}
+
+static int lm3532_als_configure(struct lm3532_data *priv,
+ struct lm3532_led *led)
+{
+ struct lm3532_als_data *als = priv->als_data;
+ u32 als_vmin, als_vmax, als_vstep;
+ int zone_reg = LM3532_REG_ZN_0_HI;
+ int ret;
+ int i;
+
+ als_vmin = als->als_vmin;
+ als_vmax = als->als_vmax;
+
+ als_vstep = (als_vmax - als_vmin) / ((LM3532_ALS_ZB_MAX + 1) * 2);
+
+ for (i = 0; i < LM3532_ALS_ZB_MAX; i++) {
+ als->zones_lo[i] = ((als_vmin + als_vstep + (i * als_vstep)) *
+ LED_FULL) / 1000;
+ als->zones_hi[i] = ((als_vmin + LM3532_ALS_OFFSET_mV +
+ als_vstep + (i * als_vstep)) * LED_FULL) / 1000;
+
+ zone_reg = LM3532_REG_ZN_0_HI + i * 2;
+ ret = regmap_write(priv->regmap, zone_reg, als->zones_lo[i]);
+ if (ret)
+ return ret;
+
+ zone_reg += 1;
+ ret = regmap_write(priv->regmap, zone_reg, als->zones_hi[i]);
+ if (ret)
+ return ret;
+ }
+
+ als->config = (als->als_avrg_time | (LM3532_ENABLE_ALS) |
+ (als->als_input_mode << LM3532_ALS_SEL_SHIFT));
+
+ return regmap_write(priv->regmap, LM3532_ALS_CONFIG, als->config);
+}
+
+static int lm3532_parse_als(struct lm3532_data *priv)
+{
+ struct lm3532_als_data *als;
+ int als_avg_time;
+ int als_impedance;
+ int ret;
+
+ als = devm_kzalloc(priv->dev, sizeof(*als), GFP_KERNEL);
+ if (als == NULL)
+ return -ENOMEM;
+
+ ret = device_property_read_u32(&priv->client->dev, "ti,als-vmin",
+ &als->als_vmin);
+ if (ret)
+ als->als_vmin = 0;
+
+ ret = device_property_read_u32(&priv->client->dev, "ti,als-vmax",
+ &als->als_vmax);
+ if (ret)
+ als->als_vmax = LM3532_ALS_WINDOW_mV;
+
+ if (als->als_vmax > LM3532_ALS_WINDOW_mV) {
+ ret = -EINVAL;
+ return ret;
+ }
+
+ ret = device_property_read_u32(&priv->client->dev, "ti,als1-imp-sel",
+ &als_impedance);
+ if (ret)
+ als->als1_imp_sel = 0;
+ else
+ als->als1_imp_sel = lm3532_get_als_imp_index(als_impedance);
+
+ ret = device_property_read_u32(&priv->client->dev, "ti,als2-imp-sel",
+ &als_impedance);
+ if (ret)
+ als->als2_imp_sel = 0;
+ else
+ als->als2_imp_sel = lm3532_get_als_imp_index(als_impedance);
+
+ ret = device_property_read_u32(&priv->client->dev, "ti,als-avrg-time-us",
+ &als_avg_time);
+ if (ret)
+ als->als_avrg_time = 0;
+ else
+ als->als_avrg_time = lm3532_get_als_avg_index(als_avg_time);
+
+ ret = device_property_read_u8(&priv->client->dev, "ti,als-input-mode",
+ &als->als_input_mode);
+ if (ret)
+ als->als_input_mode = 0;
+
+ if (als->als_input_mode > LM3532_BL_MODE_ALS) {
+ ret = -EINVAL;
+ return ret;
+ }
+
+ priv->als_data = als;
+
+ return ret;
+}
+
+static int lm3532_parse_node(struct lm3532_data *priv)
+{
+ struct fwnode_handle *child = NULL;
+ struct lm3532_led *led;
+ int control_bank;
+ u32 ramp_time;
+ size_t i = 0;
+ int ret;
+
+ priv->enable_gpio = devm_gpiod_get_optional(&priv->client->dev,
+ "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(priv->enable_gpio))
+ priv->enable_gpio = NULL;
+
+ priv->regulator = devm_regulator_get(&priv->client->dev, "vin");
+ if (IS_ERR(priv->regulator))
+ priv->regulator = NULL;
+
+ ret = device_property_read_u32(&priv->client->dev, "ramp-up-us",
+ &ramp_time);
+ if (ret)
+ dev_info(&priv->client->dev, "ramp-up-ms property missing\n");
+ else
+ priv->runtime_ramp_up = lm3532_get_ramp_index(ramp_time);
+
+ ret = device_property_read_u32(&priv->client->dev, "ramp-down-us",
+ &ramp_time);
+ if (ret)
+ dev_info(&priv->client->dev, "ramp-down-ms property missing\n");
+ else
+ priv->runtime_ramp_down = lm3532_get_ramp_index(ramp_time);
+
+ device_for_each_child_node(priv->dev, child) {
+ struct led_init_data idata = {
+ .fwnode = child,
+ .default_label = ":",
+ .devicename = priv->client->name,
+ };
+
+ led = &priv->leds[i];
+
+ ret = fwnode_property_read_u32(child, "reg", &control_bank);
+ if (ret) {
+ dev_err(&priv->client->dev, "reg property missing\n");
+ goto child_out;
+ }
+
+ if (control_bank > LM3532_CONTROL_C) {
+ dev_err(&priv->client->dev, "Control bank invalid\n");
+ continue;
+ }
+
+ led->control_bank = control_bank;
+
+ ret = fwnode_property_read_u32(child, "ti,led-mode",
+ &led->mode);
+ if (ret) {
+ dev_err(&priv->client->dev, "ti,led-mode property missing\n");
+ goto child_out;
+ }
+
+ if (fwnode_property_present(child, "led-max-microamp") &&
+ fwnode_property_read_u32(child, "led-max-microamp",
+ &led->full_scale_current))
+ dev_err(&priv->client->dev,
+ "Failed getting led-max-microamp\n");
+ else
+ led->full_scale_current = min(led->full_scale_current,
+ LM3532_FS_CURR_MAX);
+
+ if (led->mode == LM3532_BL_MODE_ALS) {
+ led->mode = LM3532_ALS_CTRL;
+ ret = lm3532_parse_als(priv);
+ if (ret)
+ dev_err(&priv->client->dev, "Failed to parse als\n");
+ else
+ lm3532_als_configure(priv, led);
+ } else {
+ led->mode = LM3532_I2C_CTRL;
+ }
+
+ led->num_leds = fwnode_property_count_u32(child, "led-sources");
+ if (led->num_leds > LM3532_MAX_LED_STRINGS) {
+ dev_err(&priv->client->dev, "Too many LED string defined\n");
+ continue;
+ }
+
+ ret = fwnode_property_read_u32_array(child, "led-sources",
+ led->led_strings,
+ led->num_leds);
+ if (ret) {
+ dev_err(&priv->client->dev, "led-sources property missing\n");
+ goto child_out;
+ }
+
+ led->priv = priv;
+ led->led_dev.brightness_set_blocking = lm3532_brightness_set;
+
+ ret = devm_led_classdev_register_ext(priv->dev, &led->led_dev, &idata);
+ if (ret) {
+ dev_err(&priv->client->dev, "led register err: %d\n",
+ ret);
+ goto child_out;
+ }
+
+ ret = lm3532_init_registers(led);
+ if (ret) {
+ dev_err(&priv->client->dev, "register init err: %d\n",
+ ret);
+ goto child_out;
+ }
+
+ i++;
+ }
+ return 0;
+
+child_out:
+ fwnode_handle_put(child);
+ return ret;
+}
+
+static int lm3532_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lm3532_data *drvdata;
+ int ret = 0;
+ int count;
+
+ count = device_get_child_node_count(&client->dev);
+ if (!count) {
+ dev_err(&client->dev, "LEDs are not defined in device tree!");
+ return -ENODEV;
+ }
+
+ drvdata = devm_kzalloc(&client->dev, struct_size(drvdata, leds, count),
+ GFP_KERNEL);
+ if (drvdata == NULL)
+ return -ENOMEM;
+
+ drvdata->client = client;
+ drvdata->dev = &client->dev;
+
+ drvdata->regmap = devm_regmap_init_i2c(client, &lm3532_regmap_config);
+ if (IS_ERR(drvdata->regmap)) {
+ ret = PTR_ERR(drvdata->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ mutex_init(&drvdata->lock);
+ i2c_set_clientdata(client, drvdata);
+
+ ret = lm3532_parse_node(drvdata);
+ if (ret) {
+ dev_err(&client->dev, "Failed to parse node\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static void lm3532_remove(struct i2c_client *client)
+{
+ struct lm3532_data *drvdata = i2c_get_clientdata(client);
+
+ mutex_destroy(&drvdata->lock);
+
+ if (drvdata->enable_gpio)
+ gpiod_direction_output(drvdata->enable_gpio, 0);
+}
+
+static const struct of_device_id of_lm3532_leds_match[] = {
+ { .compatible = "ti,lm3532", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_lm3532_leds_match);
+
+static const struct i2c_device_id lm3532_id[] = {
+ {LM3532_NAME, 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, lm3532_id);
+
+static struct i2c_driver lm3532_i2c_driver = {
+ .probe = lm3532_probe,
+ .remove = lm3532_remove,
+ .id_table = lm3532_id,
+ .driver = {
+ .name = LM3532_NAME,
+ .of_match_table = of_lm3532_leds_match,
+ },
+};
+module_i2c_driver(lm3532_i2c_driver);
+
+MODULE_DESCRIPTION("Back Light driver for LM3532");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
diff --git a/drivers/leds/leds-lm3533.c b/drivers/leds/leds-lm3533.c
new file mode 100644
index 000000000..43d5970d9
--- /dev/null
+++ b/drivers/leds/leds-lm3533.c
@@ -0,0 +1,757 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * leds-lm3533.c -- LM3533 LED driver
+ *
+ * Copyright (C) 2011-2012 Texas Instruments
+ *
+ * Author: Johan Hovold <jhovold@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/leds.h>
+#include <linux/mfd/core.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/lm3533.h>
+
+
+#define LM3533_LVCTRLBANK_MIN 2
+#define LM3533_LVCTRLBANK_MAX 5
+#define LM3533_LVCTRLBANK_COUNT 4
+#define LM3533_RISEFALLTIME_MAX 7
+#define LM3533_ALS_CHANNEL_LV_MIN 1
+#define LM3533_ALS_CHANNEL_LV_MAX 2
+
+#define LM3533_REG_CTRLBANK_BCONF_BASE 0x1b
+#define LM3533_REG_PATTERN_ENABLE 0x28
+#define LM3533_REG_PATTERN_LOW_TIME_BASE 0x71
+#define LM3533_REG_PATTERN_HIGH_TIME_BASE 0x72
+#define LM3533_REG_PATTERN_RISETIME_BASE 0x74
+#define LM3533_REG_PATTERN_FALLTIME_BASE 0x75
+
+#define LM3533_REG_PATTERN_STEP 0x10
+
+#define LM3533_REG_CTRLBANK_BCONF_MAPPING_MASK 0x04
+#define LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK 0x02
+#define LM3533_REG_CTRLBANK_BCONF_ALS_CHANNEL_MASK 0x01
+
+#define LM3533_LED_FLAG_PATTERN_ENABLE 1
+
+
+struct lm3533_led {
+ struct lm3533 *lm3533;
+ struct lm3533_ctrlbank cb;
+ struct led_classdev cdev;
+ int id;
+
+ struct mutex mutex;
+ unsigned long flags;
+};
+
+
+static inline struct lm3533_led *to_lm3533_led(struct led_classdev *cdev)
+{
+ return container_of(cdev, struct lm3533_led, cdev);
+}
+
+static inline int lm3533_led_get_ctrlbank_id(struct lm3533_led *led)
+{
+ return led->id + 2;
+}
+
+static inline u8 lm3533_led_get_lv_reg(struct lm3533_led *led, u8 base)
+{
+ return base + led->id;
+}
+
+static inline u8 lm3533_led_get_pattern(struct lm3533_led *led)
+{
+ return led->id;
+}
+
+static inline u8 lm3533_led_get_pattern_reg(struct lm3533_led *led,
+ u8 base)
+{
+ return base + lm3533_led_get_pattern(led) * LM3533_REG_PATTERN_STEP;
+}
+
+static int lm3533_led_pattern_enable(struct lm3533_led *led, int enable)
+{
+ u8 mask;
+ u8 val;
+ int pattern;
+ int state;
+ int ret = 0;
+
+ dev_dbg(led->cdev.dev, "%s - %d\n", __func__, enable);
+
+ mutex_lock(&led->mutex);
+
+ state = test_bit(LM3533_LED_FLAG_PATTERN_ENABLE, &led->flags);
+ if ((enable && state) || (!enable && !state))
+ goto out;
+
+ pattern = lm3533_led_get_pattern(led);
+ mask = 1 << (2 * pattern);
+
+ if (enable)
+ val = mask;
+ else
+ val = 0;
+
+ ret = lm3533_update(led->lm3533, LM3533_REG_PATTERN_ENABLE, val, mask);
+ if (ret) {
+ dev_err(led->cdev.dev, "failed to enable pattern %d (%d)\n",
+ pattern, enable);
+ goto out;
+ }
+
+ __change_bit(LM3533_LED_FLAG_PATTERN_ENABLE, &led->flags);
+out:
+ mutex_unlock(&led->mutex);
+
+ return ret;
+}
+
+static int lm3533_led_set(struct led_classdev *cdev,
+ enum led_brightness value)
+{
+ struct lm3533_led *led = to_lm3533_led(cdev);
+
+ dev_dbg(led->cdev.dev, "%s - %d\n", __func__, value);
+
+ if (value == 0)
+ lm3533_led_pattern_enable(led, 0); /* disable blink */
+
+ return lm3533_ctrlbank_set_brightness(&led->cb, value);
+}
+
+static enum led_brightness lm3533_led_get(struct led_classdev *cdev)
+{
+ struct lm3533_led *led = to_lm3533_led(cdev);
+ u8 val;
+ int ret;
+
+ ret = lm3533_ctrlbank_get_brightness(&led->cb, &val);
+ if (ret)
+ return ret;
+
+ dev_dbg(led->cdev.dev, "%s - %u\n", __func__, val);
+
+ return val;
+}
+
+/* Pattern generator defines (delays in us). */
+#define LM3533_LED_DELAY1_VMIN 0x00
+#define LM3533_LED_DELAY2_VMIN 0x3d
+#define LM3533_LED_DELAY3_VMIN 0x80
+
+#define LM3533_LED_DELAY1_VMAX (LM3533_LED_DELAY2_VMIN - 1)
+#define LM3533_LED_DELAY2_VMAX (LM3533_LED_DELAY3_VMIN - 1)
+#define LM3533_LED_DELAY3_VMAX 0xff
+
+#define LM3533_LED_DELAY1_TMIN 16384U
+#define LM3533_LED_DELAY2_TMIN 1130496U
+#define LM3533_LED_DELAY3_TMIN 10305536U
+
+#define LM3533_LED_DELAY1_TMAX 999424U
+#define LM3533_LED_DELAY2_TMAX 9781248U
+#define LM3533_LED_DELAY3_TMAX 76890112U
+
+/* t_step = (t_max - t_min) / (v_max - v_min) */
+#define LM3533_LED_DELAY1_TSTEP 16384
+#define LM3533_LED_DELAY2_TSTEP 131072
+#define LM3533_LED_DELAY3_TSTEP 524288
+
+/* Delay limits for hardware accelerated blinking (in ms). */
+#define LM3533_LED_DELAY_ON_MAX \
+ ((LM3533_LED_DELAY2_TMAX + LM3533_LED_DELAY2_TSTEP / 2) / 1000)
+#define LM3533_LED_DELAY_OFF_MAX \
+ ((LM3533_LED_DELAY3_TMAX + LM3533_LED_DELAY3_TSTEP / 2) / 1000)
+
+/*
+ * Returns linear map of *t from [t_min,t_max] to [v_min,v_max] with a step
+ * size of t_step, where
+ *
+ * t_step = (t_max - t_min) / (v_max - v_min)
+ *
+ * and updates *t to reflect the mapped value.
+ */
+static u8 time_to_val(unsigned *t, unsigned t_min, unsigned t_step,
+ u8 v_min, u8 v_max)
+{
+ unsigned val;
+
+ val = (*t + t_step / 2 - t_min) / t_step + v_min;
+
+ *t = t_step * (val - v_min) + t_min;
+
+ return (u8)val;
+}
+
+/*
+ * Returns time code corresponding to *delay (in ms) and updates *delay to
+ * reflect actual hardware delay.
+ *
+ * Hardware supports 256 discrete delay times, divided into three groups with
+ * the following ranges and step-sizes:
+ *
+ * [ 16, 999] [0x00, 0x3e] step 16 ms
+ * [ 1130, 9781] [0x3d, 0x7f] step 131 ms
+ * [10306, 76890] [0x80, 0xff] step 524 ms
+ *
+ * Note that delay group 3 is only available for delay_off.
+ */
+static u8 lm3533_led_get_hw_delay(unsigned *delay)
+{
+ unsigned t;
+ u8 val;
+
+ t = *delay * 1000;
+
+ if (t >= (LM3533_LED_DELAY2_TMAX + LM3533_LED_DELAY3_TMIN) / 2) {
+ t = clamp(t, LM3533_LED_DELAY3_TMIN, LM3533_LED_DELAY3_TMAX);
+ val = time_to_val(&t, LM3533_LED_DELAY3_TMIN,
+ LM3533_LED_DELAY3_TSTEP,
+ LM3533_LED_DELAY3_VMIN,
+ LM3533_LED_DELAY3_VMAX);
+ } else if (t >= (LM3533_LED_DELAY1_TMAX + LM3533_LED_DELAY2_TMIN) / 2) {
+ t = clamp(t, LM3533_LED_DELAY2_TMIN, LM3533_LED_DELAY2_TMAX);
+ val = time_to_val(&t, LM3533_LED_DELAY2_TMIN,
+ LM3533_LED_DELAY2_TSTEP,
+ LM3533_LED_DELAY2_VMIN,
+ LM3533_LED_DELAY2_VMAX);
+ } else {
+ t = clamp(t, LM3533_LED_DELAY1_TMIN, LM3533_LED_DELAY1_TMAX);
+ val = time_to_val(&t, LM3533_LED_DELAY1_TMIN,
+ LM3533_LED_DELAY1_TSTEP,
+ LM3533_LED_DELAY1_VMIN,
+ LM3533_LED_DELAY1_VMAX);
+ }
+
+ *delay = (t + 500) / 1000;
+
+ return val;
+}
+
+/*
+ * Set delay register base to *delay (in ms) and update *delay to reflect
+ * actual hardware delay used.
+ */
+static u8 lm3533_led_delay_set(struct lm3533_led *led, u8 base,
+ unsigned long *delay)
+{
+ unsigned t;
+ u8 val;
+ u8 reg;
+ int ret;
+
+ t = (unsigned)*delay;
+
+ /* Delay group 3 is only available for low time (delay off). */
+ if (base != LM3533_REG_PATTERN_LOW_TIME_BASE)
+ t = min(t, LM3533_LED_DELAY2_TMAX / 1000);
+
+ val = lm3533_led_get_hw_delay(&t);
+
+ dev_dbg(led->cdev.dev, "%s - %lu: %u (0x%02x)\n", __func__,
+ *delay, t, val);
+ reg = lm3533_led_get_pattern_reg(led, base);
+ ret = lm3533_write(led->lm3533, reg, val);
+ if (ret)
+ dev_err(led->cdev.dev, "failed to set delay (%02x)\n", reg);
+
+ *delay = t;
+
+ return ret;
+}
+
+static int lm3533_led_delay_on_set(struct lm3533_led *led, unsigned long *t)
+{
+ return lm3533_led_delay_set(led, LM3533_REG_PATTERN_HIGH_TIME_BASE, t);
+}
+
+static int lm3533_led_delay_off_set(struct lm3533_led *led, unsigned long *t)
+{
+ return lm3533_led_delay_set(led, LM3533_REG_PATTERN_LOW_TIME_BASE, t);
+}
+
+static int lm3533_led_blink_set(struct led_classdev *cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct lm3533_led *led = to_lm3533_led(cdev);
+ int ret;
+
+ dev_dbg(led->cdev.dev, "%s - on = %lu, off = %lu\n", __func__,
+ *delay_on, *delay_off);
+
+ if (*delay_on > LM3533_LED_DELAY_ON_MAX ||
+ *delay_off > LM3533_LED_DELAY_OFF_MAX)
+ return -EINVAL;
+
+ if (*delay_on == 0 && *delay_off == 0) {
+ *delay_on = 500;
+ *delay_off = 500;
+ }
+
+ ret = lm3533_led_delay_on_set(led, delay_on);
+ if (ret)
+ return ret;
+
+ ret = lm3533_led_delay_off_set(led, delay_off);
+ if (ret)
+ return ret;
+
+ return lm3533_led_pattern_enable(led, 1);
+}
+
+static ssize_t show_id(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", led->id);
+}
+
+/*
+ * Pattern generator rise/fall times:
+ *
+ * 0 - 2048 us (default)
+ * 1 - 262 ms
+ * 2 - 524 ms
+ * 3 - 1.049 s
+ * 4 - 2.097 s
+ * 5 - 4.194 s
+ * 6 - 8.389 s
+ * 7 - 16.78 s
+ */
+static ssize_t show_risefalltime(struct device *dev,
+ struct device_attribute *attr,
+ char *buf, u8 base)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+ ssize_t ret;
+ u8 reg;
+ u8 val;
+
+ reg = lm3533_led_get_pattern_reg(led, base);
+ ret = lm3533_read(led->lm3533, reg, &val);
+ if (ret)
+ return ret;
+
+ return scnprintf(buf, PAGE_SIZE, "%x\n", val);
+}
+
+static ssize_t show_risetime(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return show_risefalltime(dev, attr, buf,
+ LM3533_REG_PATTERN_RISETIME_BASE);
+}
+
+static ssize_t show_falltime(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return show_risefalltime(dev, attr, buf,
+ LM3533_REG_PATTERN_FALLTIME_BASE);
+}
+
+static ssize_t store_risefalltime(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, u8 base)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+ u8 val;
+ u8 reg;
+ int ret;
+
+ if (kstrtou8(buf, 0, &val) || val > LM3533_RISEFALLTIME_MAX)
+ return -EINVAL;
+
+ reg = lm3533_led_get_pattern_reg(led, base);
+ ret = lm3533_write(led->lm3533, reg, val);
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static ssize_t store_risetime(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ return store_risefalltime(dev, attr, buf, len,
+ LM3533_REG_PATTERN_RISETIME_BASE);
+}
+
+static ssize_t store_falltime(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ return store_risefalltime(dev, attr, buf, len,
+ LM3533_REG_PATTERN_FALLTIME_BASE);
+}
+
+static ssize_t show_als_channel(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+ unsigned channel;
+ u8 reg;
+ u8 val;
+ int ret;
+
+ reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
+ ret = lm3533_read(led->lm3533, reg, &val);
+ if (ret)
+ return ret;
+
+ channel = (val & LM3533_REG_CTRLBANK_BCONF_ALS_CHANNEL_MASK) + 1;
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", channel);
+}
+
+static ssize_t store_als_channel(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+ unsigned channel;
+ u8 reg;
+ u8 val;
+ u8 mask;
+ int ret;
+
+ if (kstrtouint(buf, 0, &channel))
+ return -EINVAL;
+
+ if (channel < LM3533_ALS_CHANNEL_LV_MIN ||
+ channel > LM3533_ALS_CHANNEL_LV_MAX)
+ return -EINVAL;
+
+ reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
+ mask = LM3533_REG_CTRLBANK_BCONF_ALS_CHANNEL_MASK;
+ val = channel - 1;
+
+ ret = lm3533_update(led->lm3533, reg, val, mask);
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static ssize_t show_als_en(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+ bool enable;
+ u8 reg;
+ u8 val;
+ int ret;
+
+ reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
+ ret = lm3533_read(led->lm3533, reg, &val);
+ if (ret)
+ return ret;
+
+ enable = val & LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK;
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", enable);
+}
+
+static ssize_t store_als_en(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+ unsigned enable;
+ u8 reg;
+ u8 mask;
+ u8 val;
+ int ret;
+
+ if (kstrtouint(buf, 0, &enable))
+ return -EINVAL;
+
+ reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
+ mask = LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK;
+
+ if (enable)
+ val = mask;
+ else
+ val = 0;
+
+ ret = lm3533_update(led->lm3533, reg, val, mask);
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static ssize_t show_linear(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+ u8 reg;
+ u8 val;
+ int linear;
+ int ret;
+
+ reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
+ ret = lm3533_read(led->lm3533, reg, &val);
+ if (ret)
+ return ret;
+
+ if (val & LM3533_REG_CTRLBANK_BCONF_MAPPING_MASK)
+ linear = 1;
+ else
+ linear = 0;
+
+ return scnprintf(buf, PAGE_SIZE, "%x\n", linear);
+}
+
+static ssize_t store_linear(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+ unsigned long linear;
+ u8 reg;
+ u8 mask;
+ u8 val;
+ int ret;
+
+ if (kstrtoul(buf, 0, &linear))
+ return -EINVAL;
+
+ reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
+ mask = LM3533_REG_CTRLBANK_BCONF_MAPPING_MASK;
+
+ if (linear)
+ val = mask;
+ else
+ val = 0;
+
+ ret = lm3533_update(led->lm3533, reg, val, mask);
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static ssize_t show_pwm(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+ u8 val;
+ int ret;
+
+ ret = lm3533_ctrlbank_get_pwm(&led->cb, &val);
+ if (ret)
+ return ret;
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+}
+
+static ssize_t store_pwm(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+ u8 val;
+ int ret;
+
+ if (kstrtou8(buf, 0, &val))
+ return -EINVAL;
+
+ ret = lm3533_ctrlbank_set_pwm(&led->cb, val);
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static LM3533_ATTR_RW(als_channel);
+static LM3533_ATTR_RW(als_en);
+static LM3533_ATTR_RW(falltime);
+static LM3533_ATTR_RO(id);
+static LM3533_ATTR_RW(linear);
+static LM3533_ATTR_RW(pwm);
+static LM3533_ATTR_RW(risetime);
+
+static struct attribute *lm3533_led_attributes[] = {
+ &dev_attr_als_channel.attr,
+ &dev_attr_als_en.attr,
+ &dev_attr_falltime.attr,
+ &dev_attr_id.attr,
+ &dev_attr_linear.attr,
+ &dev_attr_pwm.attr,
+ &dev_attr_risetime.attr,
+ NULL,
+};
+
+static umode_t lm3533_led_attr_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3533_led *led = to_lm3533_led(led_cdev);
+ umode_t mode = attr->mode;
+
+ if (attr == &dev_attr_als_channel.attr ||
+ attr == &dev_attr_als_en.attr) {
+ if (!led->lm3533->have_als)
+ mode = 0;
+ }
+
+ return mode;
+};
+
+static const struct attribute_group lm3533_led_attribute_group = {
+ .is_visible = lm3533_led_attr_is_visible,
+ .attrs = lm3533_led_attributes
+};
+
+static const struct attribute_group *lm3533_led_attribute_groups[] = {
+ &lm3533_led_attribute_group,
+ NULL
+};
+
+static int lm3533_led_setup(struct lm3533_led *led,
+ struct lm3533_led_platform_data *pdata)
+{
+ int ret;
+
+ ret = lm3533_ctrlbank_set_max_current(&led->cb, pdata->max_current);
+ if (ret)
+ return ret;
+
+ return lm3533_ctrlbank_set_pwm(&led->cb, pdata->pwm);
+}
+
+static int lm3533_led_probe(struct platform_device *pdev)
+{
+ struct lm3533 *lm3533;
+ struct lm3533_led_platform_data *pdata;
+ struct lm3533_led *led;
+ int ret;
+
+ dev_dbg(&pdev->dev, "%s\n", __func__);
+
+ lm3533 = dev_get_drvdata(pdev->dev.parent);
+ if (!lm3533)
+ return -EINVAL;
+
+ pdata = dev_get_platdata(&pdev->dev);
+ if (!pdata) {
+ dev_err(&pdev->dev, "no platform data\n");
+ return -EINVAL;
+ }
+
+ if (pdev->id < 0 || pdev->id >= LM3533_LVCTRLBANK_COUNT) {
+ dev_err(&pdev->dev, "illegal LED id %d\n", pdev->id);
+ return -EINVAL;
+ }
+
+ led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->lm3533 = lm3533;
+ led->cdev.name = pdata->name;
+ led->cdev.default_trigger = pdata->default_trigger;
+ led->cdev.brightness_set_blocking = lm3533_led_set;
+ led->cdev.brightness_get = lm3533_led_get;
+ led->cdev.blink_set = lm3533_led_blink_set;
+ led->cdev.brightness = LED_OFF;
+ led->cdev.groups = lm3533_led_attribute_groups;
+ led->id = pdev->id;
+
+ mutex_init(&led->mutex);
+
+ /* The class framework makes a callback to get brightness during
+ * registration so use parent device (for error reporting) until
+ * registered.
+ */
+ led->cb.lm3533 = lm3533;
+ led->cb.id = lm3533_led_get_ctrlbank_id(led);
+ led->cb.dev = lm3533->dev;
+
+ platform_set_drvdata(pdev, led);
+
+ ret = led_classdev_register(pdev->dev.parent, &led->cdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register LED %d\n", pdev->id);
+ return ret;
+ }
+
+ led->cb.dev = led->cdev.dev;
+
+ ret = lm3533_led_setup(led, pdata);
+ if (ret)
+ goto err_deregister;
+
+ ret = lm3533_ctrlbank_enable(&led->cb);
+ if (ret)
+ goto err_deregister;
+
+ return 0;
+
+err_deregister:
+ led_classdev_unregister(&led->cdev);
+
+ return ret;
+}
+
+static int lm3533_led_remove(struct platform_device *pdev)
+{
+ struct lm3533_led *led = platform_get_drvdata(pdev);
+
+ dev_dbg(&pdev->dev, "%s\n", __func__);
+
+ lm3533_ctrlbank_disable(&led->cb);
+ led_classdev_unregister(&led->cdev);
+
+ return 0;
+}
+
+static void lm3533_led_shutdown(struct platform_device *pdev)
+{
+
+ struct lm3533_led *led = platform_get_drvdata(pdev);
+
+ dev_dbg(&pdev->dev, "%s\n", __func__);
+
+ lm3533_ctrlbank_disable(&led->cb);
+ lm3533_led_set(&led->cdev, LED_OFF); /* disable blink */
+}
+
+static struct platform_driver lm3533_led_driver = {
+ .driver = {
+ .name = "lm3533-leds",
+ },
+ .probe = lm3533_led_probe,
+ .remove = lm3533_led_remove,
+ .shutdown = lm3533_led_shutdown,
+};
+module_platform_driver(lm3533_led_driver);
+
+MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
+MODULE_DESCRIPTION("LM3533 LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:lm3533-leds");
diff --git a/drivers/leds/leds-lm355x.c b/drivers/leds/leds-lm355x.c
new file mode 100644
index 000000000..daa35927b
--- /dev/null
+++ b/drivers/leds/leds-lm355x.c
@@ -0,0 +1,529 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+* Simple driver for Texas Instruments LM355x LED Flash driver chip
+* Copyright (C) 2012 Texas Instruments
+*/
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/fs.h>
+#include <linux/regmap.h>
+#include <linux/platform_data/leds-lm355x.h>
+
+enum lm355x_type {
+ CHIP_LM3554 = 0,
+ CHIP_LM3556,
+};
+
+enum lm355x_regs {
+ REG_FLAG = 0,
+ REG_TORCH_CFG,
+ REG_TORCH_CTRL,
+ REG_STROBE_CFG,
+ REG_FLASH_CTRL,
+ REG_INDI_CFG,
+ REG_INDI_CTRL,
+ REG_OPMODE,
+ REG_MAX,
+};
+
+/* operation mode */
+enum lm355x_mode {
+ MODE_SHDN = 0,
+ MODE_INDIC,
+ MODE_TORCH,
+ MODE_FLASH
+};
+
+/* register map info. */
+struct lm355x_reg_data {
+ u8 regno;
+ u8 mask;
+ u8 shift;
+};
+
+struct lm355x_chip_data {
+ struct device *dev;
+ enum lm355x_type type;
+
+ struct led_classdev cdev_flash;
+ struct led_classdev cdev_torch;
+ struct led_classdev cdev_indicator;
+
+ struct lm355x_platform_data *pdata;
+ struct regmap *regmap;
+ struct mutex lock;
+
+ unsigned int last_flag;
+ struct lm355x_reg_data *regs;
+};
+
+/* specific indicator function for lm3556 */
+enum lm3556_indic_pulse_time {
+ PULSE_TIME_0_MS = 0,
+ PULSE_TIME_32_MS,
+ PULSE_TIME_64_MS,
+ PULSE_TIME_92_MS,
+ PULSE_TIME_128_MS,
+ PULSE_TIME_160_MS,
+ PULSE_TIME_196_MS,
+ PULSE_TIME_224_MS,
+ PULSE_TIME_256_MS,
+ PULSE_TIME_288_MS,
+ PULSE_TIME_320_MS,
+ PULSE_TIME_352_MS,
+ PULSE_TIME_384_MS,
+ PULSE_TIME_416_MS,
+ PULSE_TIME_448_MS,
+ PULSE_TIME_480_MS,
+};
+
+enum lm3556_indic_n_blank {
+ INDIC_N_BLANK_0 = 0,
+ INDIC_N_BLANK_1,
+ INDIC_N_BLANK_2,
+ INDIC_N_BLANK_3,
+ INDIC_N_BLANK_4,
+ INDIC_N_BLANK_5,
+ INDIC_N_BLANK_6,
+ INDIC_N_BLANK_7,
+ INDIC_N_BLANK_8,
+ INDIC_N_BLANK_9,
+ INDIC_N_BLANK_10,
+ INDIC_N_BLANK_11,
+ INDIC_N_BLANK_12,
+ INDIC_N_BLANK_13,
+ INDIC_N_BLANK_14,
+ INDIC_N_BLANK_15,
+};
+
+enum lm3556_indic_period {
+ INDIC_PERIOD_0 = 0,
+ INDIC_PERIOD_1,
+ INDIC_PERIOD_2,
+ INDIC_PERIOD_3,
+ INDIC_PERIOD_4,
+ INDIC_PERIOD_5,
+ INDIC_PERIOD_6,
+ INDIC_PERIOD_7,
+};
+
+#define INDIC_PATTERN_SIZE 4
+
+struct indicator {
+ u8 blinking;
+ u8 period_cnt;
+};
+
+/* indicator pattern data only for lm3556 */
+static struct indicator indicator_pattern[INDIC_PATTERN_SIZE] = {
+ [0] = {(INDIC_N_BLANK_1 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_1},
+ [1] = {(INDIC_N_BLANK_15 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_2},
+ [2] = {(INDIC_N_BLANK_10 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_4},
+ [3] = {(INDIC_N_BLANK_5 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_7},
+};
+
+static struct lm355x_reg_data lm3554_regs[REG_MAX] = {
+ [REG_FLAG] = {0xD0, 0xBF, 0},
+ [REG_TORCH_CFG] = {0xE0, 0x80, 7},
+ [REG_TORCH_CTRL] = {0xA0, 0x38, 3},
+ [REG_STROBE_CFG] = {0xE0, 0x04, 2},
+ [REG_FLASH_CTRL] = {0xB0, 0x78, 3},
+ [REG_INDI_CFG] = {0xE0, 0x08, 3},
+ [REG_INDI_CTRL] = {0xA0, 0xC0, 6},
+ [REG_OPMODE] = {0xA0, 0x03, 0},
+};
+
+static struct lm355x_reg_data lm3556_regs[REG_MAX] = {
+ [REG_FLAG] = {0x0B, 0xFF, 0},
+ [REG_TORCH_CFG] = {0x0A, 0x10, 4},
+ [REG_TORCH_CTRL] = {0x09, 0x70, 4},
+ [REG_STROBE_CFG] = {0x0A, 0x20, 5},
+ [REG_FLASH_CTRL] = {0x09, 0x0F, 0},
+ [REG_INDI_CFG] = {0xFF, 0xFF, 0},
+ [REG_INDI_CTRL] = {0x09, 0x70, 4},
+ [REG_OPMODE] = {0x0A, 0x03, 0},
+};
+
+static char lm355x_name[][I2C_NAME_SIZE] = {
+ [CHIP_LM3554] = LM3554_NAME,
+ [CHIP_LM3556] = LM3556_NAME,
+};
+
+/* chip initialize */
+static int lm355x_chip_init(struct lm355x_chip_data *chip)
+{
+ int ret;
+ unsigned int reg_val;
+ struct lm355x_platform_data *pdata = chip->pdata;
+
+ /* input and output pins configuration */
+ switch (chip->type) {
+ case CHIP_LM3554:
+ reg_val = (u32)pdata->pin_tx2 | (u32)pdata->ntc_pin;
+ ret = regmap_update_bits(chip->regmap, 0xE0, 0x28, reg_val);
+ if (ret < 0)
+ goto out;
+ reg_val = (u32)pdata->pass_mode;
+ ret = regmap_update_bits(chip->regmap, 0xA0, 0x04, reg_val);
+ if (ret < 0)
+ goto out;
+ break;
+
+ case CHIP_LM3556:
+ reg_val = (u32)pdata->pin_tx2 | (u32)pdata->ntc_pin |
+ (u32)pdata->pass_mode;
+ ret = regmap_update_bits(chip->regmap, 0x0A, 0xC4, reg_val);
+ if (ret < 0)
+ goto out;
+ break;
+ default:
+ return -ENODATA;
+ }
+
+ return ret;
+out:
+ dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
+ return ret;
+}
+
+/* chip control */
+static int lm355x_control(struct lm355x_chip_data *chip,
+ u8 brightness, enum lm355x_mode opmode)
+{
+ int ret;
+ unsigned int reg_val;
+ struct lm355x_platform_data *pdata = chip->pdata;
+ struct lm355x_reg_data *preg = chip->regs;
+
+ ret = regmap_read(chip->regmap, preg[REG_FLAG].regno, &chip->last_flag);
+ if (ret < 0)
+ goto out;
+ if (chip->last_flag & preg[REG_FLAG].mask)
+ dev_info(chip->dev, "%s Last FLAG is 0x%x\n",
+ lm355x_name[chip->type],
+ chip->last_flag & preg[REG_FLAG].mask);
+ /* brightness 0 means shutdown */
+ if (!brightness)
+ opmode = MODE_SHDN;
+
+ switch (opmode) {
+ case MODE_TORCH:
+ ret =
+ regmap_update_bits(chip->regmap, preg[REG_TORCH_CTRL].regno,
+ preg[REG_TORCH_CTRL].mask,
+ (brightness - 1)
+ << preg[REG_TORCH_CTRL].shift);
+ if (ret < 0)
+ goto out;
+
+ if (pdata->pin_tx1 != LM355x_PIN_TORCH_DISABLE) {
+ ret =
+ regmap_update_bits(chip->regmap,
+ preg[REG_TORCH_CFG].regno,
+ preg[REG_TORCH_CFG].mask,
+ 0x01 <<
+ preg[REG_TORCH_CFG].shift);
+ if (ret < 0)
+ goto out;
+ opmode = MODE_SHDN;
+ dev_info(chip->dev,
+ "torch brt is set - ext. torch pin mode\n");
+ }
+ break;
+
+ case MODE_FLASH:
+
+ ret =
+ regmap_update_bits(chip->regmap, preg[REG_FLASH_CTRL].regno,
+ preg[REG_FLASH_CTRL].mask,
+ (brightness - 1)
+ << preg[REG_FLASH_CTRL].shift);
+ if (ret < 0)
+ goto out;
+
+ if (pdata->pin_strobe != LM355x_PIN_STROBE_DISABLE) {
+ if (chip->type == CHIP_LM3554)
+ reg_val = 0x00;
+ else
+ reg_val = 0x01;
+ ret =
+ regmap_update_bits(chip->regmap,
+ preg[REG_STROBE_CFG].regno,
+ preg[REG_STROBE_CFG].mask,
+ reg_val <<
+ preg[REG_STROBE_CFG].shift);
+ if (ret < 0)
+ goto out;
+ opmode = MODE_SHDN;
+ dev_info(chip->dev,
+ "flash brt is set - ext. strobe pin mode\n");
+ }
+ break;
+
+ case MODE_INDIC:
+ ret =
+ regmap_update_bits(chip->regmap, preg[REG_INDI_CTRL].regno,
+ preg[REG_INDI_CTRL].mask,
+ (brightness - 1)
+ << preg[REG_INDI_CTRL].shift);
+ if (ret < 0)
+ goto out;
+
+ if (pdata->pin_tx2 != LM355x_PIN_TX_DISABLE) {
+ ret =
+ regmap_update_bits(chip->regmap,
+ preg[REG_INDI_CFG].regno,
+ preg[REG_INDI_CFG].mask,
+ 0x01 <<
+ preg[REG_INDI_CFG].shift);
+ if (ret < 0)
+ goto out;
+ opmode = MODE_SHDN;
+ }
+ break;
+ case MODE_SHDN:
+ break;
+ default:
+ return -EINVAL;
+ }
+ /* operation mode control */
+ ret = regmap_update_bits(chip->regmap, preg[REG_OPMODE].regno,
+ preg[REG_OPMODE].mask,
+ opmode << preg[REG_OPMODE].shift);
+ if (ret < 0)
+ goto out;
+ return ret;
+out:
+ dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
+ return ret;
+}
+
+/* torch */
+
+static int lm355x_torch_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lm355x_chip_data *chip =
+ container_of(cdev, struct lm355x_chip_data, cdev_torch);
+ int ret;
+
+ mutex_lock(&chip->lock);
+ ret = lm355x_control(chip, brightness, MODE_TORCH);
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+/* flash */
+
+static int lm355x_strobe_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lm355x_chip_data *chip =
+ container_of(cdev, struct lm355x_chip_data, cdev_flash);
+ int ret;
+
+ mutex_lock(&chip->lock);
+ ret = lm355x_control(chip, brightness, MODE_FLASH);
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+/* indicator */
+
+static int lm355x_indicator_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lm355x_chip_data *chip =
+ container_of(cdev, struct lm355x_chip_data, cdev_indicator);
+ int ret;
+
+ mutex_lock(&chip->lock);
+ ret = lm355x_control(chip, brightness, MODE_INDIC);
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+/* indicator pattern only for lm3556*/
+static ssize_t pattern_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ ssize_t ret;
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm355x_chip_data *chip =
+ container_of(led_cdev, struct lm355x_chip_data, cdev_indicator);
+ unsigned int state;
+
+ ret = kstrtouint(buf, 10, &state);
+ if (ret)
+ goto out;
+ if (state > INDIC_PATTERN_SIZE - 1)
+ state = INDIC_PATTERN_SIZE - 1;
+
+ ret = regmap_write(chip->regmap, 0x04,
+ indicator_pattern[state].blinking);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_write(chip->regmap, 0x05,
+ indicator_pattern[state].period_cnt);
+ if (ret < 0)
+ goto out;
+
+ return size;
+out:
+ dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
+ return ret;
+}
+
+static DEVICE_ATTR_WO(pattern);
+
+static struct attribute *lm355x_indicator_attrs[] = {
+ &dev_attr_pattern.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(lm355x_indicator);
+
+static const struct regmap_config lm355x_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0xFF,
+};
+
+/* module initialize */
+static int lm355x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lm355x_platform_data *pdata = dev_get_platdata(&client->dev);
+ struct lm355x_chip_data *chip;
+
+ int err;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "i2c functionality check fail.\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (pdata == NULL) {
+ dev_err(&client->dev, "needs Platform Data.\n");
+ return -ENODATA;
+ }
+
+ chip = devm_kzalloc(&client->dev,
+ sizeof(struct lm355x_chip_data), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->dev = &client->dev;
+ chip->type = id->driver_data;
+ switch (id->driver_data) {
+ case CHIP_LM3554:
+ chip->regs = lm3554_regs;
+ break;
+ case CHIP_LM3556:
+ chip->regs = lm3556_regs;
+ break;
+ default:
+ return -ENOSYS;
+ }
+ chip->pdata = pdata;
+
+ chip->regmap = devm_regmap_init_i2c(client, &lm355x_regmap);
+ if (IS_ERR(chip->regmap)) {
+ err = PTR_ERR(chip->regmap);
+ dev_err(&client->dev,
+ "Failed to allocate register map: %d\n", err);
+ return err;
+ }
+
+ mutex_init(&chip->lock);
+ i2c_set_clientdata(client, chip);
+
+ err = lm355x_chip_init(chip);
+ if (err < 0)
+ goto err_out;
+
+ /* flash */
+ chip->cdev_flash.name = "flash";
+ chip->cdev_flash.max_brightness = 16;
+ chip->cdev_flash.brightness_set_blocking = lm355x_strobe_brightness_set;
+ chip->cdev_flash.default_trigger = "flash";
+ err = led_classdev_register(&client->dev, &chip->cdev_flash);
+ if (err < 0)
+ goto err_out;
+ /* torch */
+ chip->cdev_torch.name = "torch";
+ chip->cdev_torch.max_brightness = 8;
+ chip->cdev_torch.brightness_set_blocking = lm355x_torch_brightness_set;
+ chip->cdev_torch.default_trigger = "torch";
+ err = led_classdev_register(&client->dev, &chip->cdev_torch);
+ if (err < 0)
+ goto err_create_torch_file;
+ /* indicator */
+ chip->cdev_indicator.name = "indicator";
+ if (id->driver_data == CHIP_LM3554)
+ chip->cdev_indicator.max_brightness = 4;
+ else
+ chip->cdev_indicator.max_brightness = 8;
+ chip->cdev_indicator.brightness_set_blocking =
+ lm355x_indicator_brightness_set;
+ /* indicator pattern control only for LM3556 */
+ if (id->driver_data == CHIP_LM3556)
+ chip->cdev_indicator.groups = lm355x_indicator_groups;
+ err = led_classdev_register(&client->dev, &chip->cdev_indicator);
+ if (err < 0)
+ goto err_create_indicator_file;
+
+ dev_info(&client->dev, "%s is initialized\n",
+ lm355x_name[id->driver_data]);
+ return 0;
+
+err_create_indicator_file:
+ led_classdev_unregister(&chip->cdev_torch);
+err_create_torch_file:
+ led_classdev_unregister(&chip->cdev_flash);
+err_out:
+ return err;
+}
+
+static void lm355x_remove(struct i2c_client *client)
+{
+ struct lm355x_chip_data *chip = i2c_get_clientdata(client);
+ struct lm355x_reg_data *preg = chip->regs;
+
+ regmap_write(chip->regmap, preg[REG_OPMODE].regno, 0);
+ led_classdev_unregister(&chip->cdev_indicator);
+ led_classdev_unregister(&chip->cdev_torch);
+ led_classdev_unregister(&chip->cdev_flash);
+ dev_info(&client->dev, "%s is removed\n", lm355x_name[chip->type]);
+}
+
+static const struct i2c_device_id lm355x_id[] = {
+ {LM3554_NAME, CHIP_LM3554},
+ {LM3556_NAME, CHIP_LM3556},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, lm355x_id);
+
+static struct i2c_driver lm355x_i2c_driver = {
+ .driver = {
+ .name = LM355x_NAME,
+ .pm = NULL,
+ },
+ .probe = lm355x_probe,
+ .remove = lm355x_remove,
+ .id_table = lm355x_id,
+};
+
+module_i2c_driver(lm355x_i2c_driver);
+
+MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM355x");
+MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>");
+MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lm36274.c b/drivers/leds/leds-lm36274.c
new file mode 100644
index 000000000..e009b6d17
--- /dev/null
+++ b/drivers/leds/leds-lm36274.c
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: GPL-2.0
+// TI LM36274 LED chip family driver
+// Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com/
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/leds.h>
+#include <linux/leds-ti-lmu-common.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+
+#include <linux/mfd/ti-lmu.h>
+#include <linux/mfd/ti-lmu-register.h>
+
+#include <uapi/linux/uleds.h>
+
+#define LM36274_MAX_STRINGS 4
+#define LM36274_BL_EN BIT(4)
+
+/**
+ * struct lm36274
+ * @pdev: platform device
+ * @led_dev: led class device
+ * @lmu_data: Register and setting values for common code
+ * @regmap: Devices register map
+ * @dev: Pointer to the devices device struct
+ * @led_sources: The LED strings supported in this array
+ * @num_leds: Number of LED strings are supported in this array
+ */
+struct lm36274 {
+ struct platform_device *pdev;
+ struct led_classdev led_dev;
+ struct ti_lmu_bank lmu_data;
+ struct regmap *regmap;
+ struct device *dev;
+
+ u32 led_sources[LM36274_MAX_STRINGS];
+ int num_leds;
+};
+
+static int lm36274_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brt_val)
+{
+ struct lm36274 *chip = container_of(led_cdev, struct lm36274, led_dev);
+
+ return ti_lmu_common_set_brightness(&chip->lmu_data, brt_val);
+}
+
+static int lm36274_init(struct lm36274 *chip)
+{
+ int enable_val = 0;
+ int i;
+
+ for (i = 0; i < chip->num_leds; i++)
+ enable_val |= (1 << chip->led_sources[i]);
+
+ if (!enable_val) {
+ dev_err(chip->dev, "No LEDs were enabled\n");
+ return -EINVAL;
+ }
+
+ enable_val |= LM36274_BL_EN;
+
+ return regmap_write(chip->regmap, LM36274_REG_BL_EN, enable_val);
+}
+
+static int lm36274_parse_dt(struct lm36274 *chip,
+ struct led_init_data *init_data)
+{
+ struct device *dev = chip->dev;
+ struct fwnode_handle *child;
+ int ret;
+
+ /* There should only be 1 node */
+ if (device_get_child_node_count(dev) != 1)
+ return -EINVAL;
+
+ child = device_get_next_child_node(dev, NULL);
+
+ init_data->fwnode = child;
+ init_data->devicename = chip->pdev->name;
+ /* for backwards compatibility when `label` property is not present */
+ init_data->default_label = ":";
+
+ chip->num_leds = fwnode_property_count_u32(child, "led-sources");
+ if (chip->num_leds <= 0) {
+ ret = -ENODEV;
+ goto err;
+ }
+
+ ret = fwnode_property_read_u32_array(child, "led-sources",
+ chip->led_sources, chip->num_leds);
+ if (ret) {
+ dev_err(dev, "led-sources property missing\n");
+ goto err;
+ }
+
+ return 0;
+err:
+ fwnode_handle_put(child);
+ return ret;
+}
+
+static int lm36274_probe(struct platform_device *pdev)
+{
+ struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent);
+ struct led_init_data init_data = {};
+ struct lm36274 *chip;
+ int ret;
+
+ chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->pdev = pdev;
+ chip->dev = &pdev->dev;
+ chip->regmap = lmu->regmap;
+ platform_set_drvdata(pdev, chip);
+
+ ret = lm36274_parse_dt(chip, &init_data);
+ if (ret) {
+ dev_err(chip->dev, "Failed to parse DT node\n");
+ return ret;
+ }
+
+ ret = lm36274_init(chip);
+ if (ret) {
+ fwnode_handle_put(init_data.fwnode);
+ dev_err(chip->dev, "Failed to init the device\n");
+ return ret;
+ }
+
+ chip->lmu_data.regmap = chip->regmap;
+ chip->lmu_data.max_brightness = MAX_BRIGHTNESS_11BIT;
+ chip->lmu_data.msb_brightness_reg = LM36274_REG_BRT_MSB;
+ chip->lmu_data.lsb_brightness_reg = LM36274_REG_BRT_LSB;
+
+ chip->led_dev.max_brightness = MAX_BRIGHTNESS_11BIT;
+ chip->led_dev.brightness_set_blocking = lm36274_brightness_set;
+
+ ret = devm_led_classdev_register_ext(chip->dev, &chip->led_dev,
+ &init_data);
+ if (ret)
+ dev_err(chip->dev, "Failed to register LED for node %pfw\n",
+ init_data.fwnode);
+
+ fwnode_handle_put(init_data.fwnode);
+
+ return ret;
+}
+
+static const struct of_device_id of_lm36274_leds_match[] = {
+ { .compatible = "ti,lm36274-backlight", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_lm36274_leds_match);
+
+static struct platform_driver lm36274_driver = {
+ .probe = lm36274_probe,
+ .driver = {
+ .name = "lm36274-leds",
+ .of_match_table = of_lm36274_leds_match,
+ },
+};
+module_platform_driver(lm36274_driver)
+
+MODULE_DESCRIPTION("Texas Instruments LM36274 LED driver");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lm3642.c b/drivers/leds/leds-lm3642.c
new file mode 100644
index 000000000..428a5d928
--- /dev/null
+++ b/drivers/leds/leds-lm3642.c
@@ -0,0 +1,415 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+* Simple driver for Texas Instruments LM3642 LED Flash driver chip
+* Copyright (C) 2012 Texas Instruments
+*/
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/fs.h>
+#include <linux/regmap.h>
+#include <linux/platform_data/leds-lm3642.h>
+
+#define REG_FILT_TIME (0x0)
+#define REG_IVFM_MODE (0x1)
+#define REG_TORCH_TIME (0x6)
+#define REG_FLASH (0x8)
+#define REG_I_CTRL (0x9)
+#define REG_ENABLE (0xA)
+#define REG_FLAG (0xB)
+#define REG_MAX (0xB)
+
+#define UVLO_EN_SHIFT (7)
+#define IVM_D_TH_SHIFT (2)
+#define TORCH_RAMP_UP_TIME_SHIFT (3)
+#define TORCH_RAMP_DN_TIME_SHIFT (0)
+#define INDUCTOR_I_LIMIT_SHIFT (6)
+#define FLASH_RAMP_TIME_SHIFT (3)
+#define FLASH_TOUT_TIME_SHIFT (0)
+#define TORCH_I_SHIFT (4)
+#define FLASH_I_SHIFT (0)
+#define IVFM_SHIFT (7)
+#define TX_PIN_EN_SHIFT (6)
+#define STROBE_PIN_EN_SHIFT (5)
+#define TORCH_PIN_EN_SHIFT (4)
+#define MODE_BITS_SHIFT (0)
+
+#define UVLO_EN_MASK (0x1)
+#define IVM_D_TH_MASK (0x7)
+#define TORCH_RAMP_UP_TIME_MASK (0x7)
+#define TORCH_RAMP_DN_TIME_MASK (0x7)
+#define INDUCTOR_I_LIMIT_MASK (0x1)
+#define FLASH_RAMP_TIME_MASK (0x7)
+#define FLASH_TOUT_TIME_MASK (0x7)
+#define TORCH_I_MASK (0x7)
+#define FLASH_I_MASK (0xF)
+#define IVFM_MASK (0x1)
+#define TX_PIN_EN_MASK (0x1)
+#define STROBE_PIN_EN_MASK (0x1)
+#define TORCH_PIN_EN_MASK (0x1)
+#define MODE_BITS_MASK (0x73)
+#define EX_PIN_CONTROL_MASK (0x71)
+#define EX_PIN_ENABLE_MASK (0x70)
+
+enum lm3642_mode {
+ MODES_STASNDBY = 0,
+ MODES_INDIC,
+ MODES_TORCH,
+ MODES_FLASH
+};
+
+struct lm3642_chip_data {
+ struct device *dev;
+
+ struct led_classdev cdev_flash;
+ struct led_classdev cdev_torch;
+ struct led_classdev cdev_indicator;
+
+ u8 br_flash;
+ u8 br_torch;
+ u8 br_indicator;
+
+ enum lm3642_torch_pin_enable torch_pin;
+ enum lm3642_strobe_pin_enable strobe_pin;
+ enum lm3642_tx_pin_enable tx_pin;
+
+ struct lm3642_platform_data *pdata;
+ struct regmap *regmap;
+ struct mutex lock;
+
+ unsigned int last_flag;
+};
+
+/* chip initialize */
+static int lm3642_chip_init(struct lm3642_chip_data *chip)
+{
+ int ret;
+ struct lm3642_platform_data *pdata = chip->pdata;
+
+ /* set enable register */
+ ret = regmap_update_bits(chip->regmap, REG_ENABLE, EX_PIN_ENABLE_MASK,
+ pdata->tx_pin);
+ if (ret < 0)
+ dev_err(chip->dev, "Failed to update REG_ENABLE Register\n");
+ return ret;
+}
+
+/* chip control */
+static int lm3642_control(struct lm3642_chip_data *chip,
+ u8 brightness, enum lm3642_mode opmode)
+{
+ int ret;
+
+ ret = regmap_read(chip->regmap, REG_FLAG, &chip->last_flag);
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to read REG_FLAG Register\n");
+ return ret;
+ }
+
+ if (chip->last_flag)
+ dev_info(chip->dev, "Last FLAG is 0x%x\n", chip->last_flag);
+
+ /* brightness 0 means off-state */
+ if (!brightness)
+ opmode = MODES_STASNDBY;
+
+ switch (opmode) {
+ case MODES_TORCH:
+ ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
+ TORCH_I_MASK << TORCH_I_SHIFT,
+ (brightness - 1) << TORCH_I_SHIFT);
+
+ if (chip->torch_pin)
+ opmode |= (TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT);
+ break;
+
+ case MODES_FLASH:
+ ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
+ FLASH_I_MASK << FLASH_I_SHIFT,
+ (brightness - 1) << FLASH_I_SHIFT);
+
+ if (chip->strobe_pin)
+ opmode |= (STROBE_PIN_EN_MASK << STROBE_PIN_EN_SHIFT);
+ break;
+
+ case MODES_INDIC:
+ ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
+ TORCH_I_MASK << TORCH_I_SHIFT,
+ (brightness - 1) << TORCH_I_SHIFT);
+ break;
+
+ case MODES_STASNDBY:
+
+ break;
+
+ default:
+ return -EINVAL;
+ }
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to write REG_I_CTRL Register\n");
+ return ret;
+ }
+
+ if (chip->tx_pin)
+ opmode |= (TX_PIN_EN_MASK << TX_PIN_EN_SHIFT);
+
+ ret = regmap_update_bits(chip->regmap, REG_ENABLE,
+ MODE_BITS_MASK << MODE_BITS_SHIFT,
+ opmode << MODE_BITS_SHIFT);
+ return ret;
+}
+
+/* torch */
+
+/* torch pin config for lm3642 */
+static ssize_t torch_pin_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ ssize_t ret;
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3642_chip_data *chip =
+ container_of(led_cdev, struct lm3642_chip_data, cdev_indicator);
+ unsigned int state;
+
+ ret = kstrtouint(buf, 10, &state);
+ if (ret)
+ return ret;
+ if (state != 0)
+ state = 0x01 << TORCH_PIN_EN_SHIFT;
+
+ chip->torch_pin = state;
+ ret = regmap_update_bits(chip->regmap, REG_ENABLE,
+ TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT,
+ state);
+ if (ret < 0) {
+ dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
+ return ret;
+ }
+
+ return size;
+}
+
+static DEVICE_ATTR_WO(torch_pin);
+
+static int lm3642_torch_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lm3642_chip_data *chip =
+ container_of(cdev, struct lm3642_chip_data, cdev_torch);
+ int ret;
+
+ mutex_lock(&chip->lock);
+ chip->br_torch = brightness;
+ ret = lm3642_control(chip, chip->br_torch, MODES_TORCH);
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+/* flash */
+
+/* strobe pin config for lm3642*/
+static ssize_t strobe_pin_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ ssize_t ret;
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm3642_chip_data *chip =
+ container_of(led_cdev, struct lm3642_chip_data, cdev_indicator);
+ unsigned int state;
+
+ ret = kstrtouint(buf, 10, &state);
+ if (ret)
+ return ret;
+ if (state != 0)
+ state = 0x01 << STROBE_PIN_EN_SHIFT;
+
+ chip->strobe_pin = state;
+ ret = regmap_update_bits(chip->regmap, REG_ENABLE,
+ STROBE_PIN_EN_MASK << STROBE_PIN_EN_SHIFT,
+ state);
+ if (ret < 0) {
+ dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
+ return ret;
+ }
+
+ return size;
+}
+
+static DEVICE_ATTR_WO(strobe_pin);
+
+static int lm3642_strobe_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lm3642_chip_data *chip =
+ container_of(cdev, struct lm3642_chip_data, cdev_flash);
+ int ret;
+
+ mutex_lock(&chip->lock);
+ chip->br_flash = brightness;
+ ret = lm3642_control(chip, chip->br_flash, MODES_FLASH);
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+/* indicator */
+static int lm3642_indicator_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lm3642_chip_data *chip =
+ container_of(cdev, struct lm3642_chip_data, cdev_indicator);
+ int ret;
+
+ mutex_lock(&chip->lock);
+ chip->br_indicator = brightness;
+ ret = lm3642_control(chip, chip->br_indicator, MODES_INDIC);
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static const struct regmap_config lm3642_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = REG_MAX,
+};
+
+static struct attribute *lm3642_flash_attrs[] = {
+ &dev_attr_strobe_pin.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(lm3642_flash);
+
+static struct attribute *lm3642_torch_attrs[] = {
+ &dev_attr_torch_pin.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(lm3642_torch);
+
+static int lm3642_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lm3642_platform_data *pdata = dev_get_platdata(&client->dev);
+ struct lm3642_chip_data *chip;
+
+ int err;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "i2c functionality check fail.\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (pdata == NULL) {
+ dev_err(&client->dev, "needs Platform Data.\n");
+ return -ENODATA;
+ }
+
+ chip = devm_kzalloc(&client->dev,
+ sizeof(struct lm3642_chip_data), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->dev = &client->dev;
+ chip->pdata = pdata;
+
+ chip->tx_pin = pdata->tx_pin;
+ chip->torch_pin = pdata->torch_pin;
+ chip->strobe_pin = pdata->strobe_pin;
+
+ chip->regmap = devm_regmap_init_i2c(client, &lm3642_regmap);
+ if (IS_ERR(chip->regmap)) {
+ err = PTR_ERR(chip->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ err);
+ return err;
+ }
+
+ mutex_init(&chip->lock);
+ i2c_set_clientdata(client, chip);
+
+ err = lm3642_chip_init(chip);
+ if (err < 0)
+ goto err_out;
+
+ /* flash */
+ chip->cdev_flash.name = "flash";
+ chip->cdev_flash.max_brightness = 16;
+ chip->cdev_flash.brightness_set_blocking = lm3642_strobe_brightness_set;
+ chip->cdev_flash.default_trigger = "flash";
+ chip->cdev_flash.groups = lm3642_flash_groups;
+ err = led_classdev_register(&client->dev, &chip->cdev_flash);
+ if (err < 0) {
+ dev_err(chip->dev, "failed to register flash\n");
+ goto err_out;
+ }
+
+ /* torch */
+ chip->cdev_torch.name = "torch";
+ chip->cdev_torch.max_brightness = 8;
+ chip->cdev_torch.brightness_set_blocking = lm3642_torch_brightness_set;
+ chip->cdev_torch.default_trigger = "torch";
+ chip->cdev_torch.groups = lm3642_torch_groups;
+ err = led_classdev_register(&client->dev, &chip->cdev_torch);
+ if (err < 0) {
+ dev_err(chip->dev, "failed to register torch\n");
+ goto err_create_torch_file;
+ }
+
+ /* indicator */
+ chip->cdev_indicator.name = "indicator";
+ chip->cdev_indicator.max_brightness = 8;
+ chip->cdev_indicator.brightness_set_blocking =
+ lm3642_indicator_brightness_set;
+ err = led_classdev_register(&client->dev, &chip->cdev_indicator);
+ if (err < 0) {
+ dev_err(chip->dev, "failed to register indicator\n");
+ goto err_create_indicator_file;
+ }
+
+ dev_info(&client->dev, "LM3642 is initialized\n");
+ return 0;
+
+err_create_indicator_file:
+ led_classdev_unregister(&chip->cdev_torch);
+err_create_torch_file:
+ led_classdev_unregister(&chip->cdev_flash);
+err_out:
+ return err;
+}
+
+static void lm3642_remove(struct i2c_client *client)
+{
+ struct lm3642_chip_data *chip = i2c_get_clientdata(client);
+
+ led_classdev_unregister(&chip->cdev_indicator);
+ led_classdev_unregister(&chip->cdev_torch);
+ led_classdev_unregister(&chip->cdev_flash);
+ regmap_write(chip->regmap, REG_ENABLE, 0);
+}
+
+static const struct i2c_device_id lm3642_id[] = {
+ {LM3642_NAME, 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, lm3642_id);
+
+static struct i2c_driver lm3642_i2c_driver = {
+ .driver = {
+ .name = LM3642_NAME,
+ .pm = NULL,
+ },
+ .probe = lm3642_probe,
+ .remove = lm3642_remove,
+ .id_table = lm3642_id,
+};
+
+module_i2c_driver(lm3642_i2c_driver);
+
+MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3642");
+MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>");
+MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c
new file mode 100644
index 000000000..54b4662bf
--- /dev/null
+++ b/drivers/leds/leds-lm3692x.c
@@ -0,0 +1,529 @@
+// SPDX-License-Identifier: GPL-2.0
+// TI LM3692x LED chip family driver
+// Copyright (C) 2017-18 Texas Instruments Incorporated - https://www.ti.com/
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include <linux/log2.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#define LM36922_MODEL 0
+#define LM36923_MODEL 1
+
+#define LM3692X_REV 0x0
+#define LM3692X_RESET 0x1
+#define LM3692X_EN 0x10
+#define LM3692X_BRT_CTRL 0x11
+#define LM3692X_PWM_CTRL 0x12
+#define LM3692X_BOOST_CTRL 0x13
+#define LM3692X_AUTO_FREQ_HI 0x15
+#define LM3692X_AUTO_FREQ_LO 0x16
+#define LM3692X_BL_ADJ_THRESH 0x17
+#define LM3692X_BRT_LSB 0x18
+#define LM3692X_BRT_MSB 0x19
+#define LM3692X_FAULT_CTRL 0x1e
+#define LM3692X_FAULT_FLAGS 0x1f
+
+#define LM3692X_SW_RESET BIT(0)
+#define LM3692X_DEVICE_EN BIT(0)
+#define LM3692X_LED1_EN BIT(1)
+#define LM3692X_LED2_EN BIT(2)
+#define LM36923_LED3_EN BIT(3)
+#define LM3692X_ENABLE_MASK (LM3692X_DEVICE_EN | LM3692X_LED1_EN | \
+ LM3692X_LED2_EN | LM36923_LED3_EN)
+
+/* Brightness Control Bits */
+#define LM3692X_BL_ADJ_POL BIT(0)
+#define LM3692X_RAMP_RATE_125us 0x00
+#define LM3692X_RAMP_RATE_250us BIT(1)
+#define LM3692X_RAMP_RATE_500us BIT(2)
+#define LM3692X_RAMP_RATE_1ms (BIT(1) | BIT(2))
+#define LM3692X_RAMP_RATE_2ms BIT(3)
+#define LM3692X_RAMP_RATE_4ms (BIT(3) | BIT(1))
+#define LM3692X_RAMP_RATE_8ms (BIT(2) | BIT(3))
+#define LM3692X_RAMP_RATE_16ms (BIT(1) | BIT(2) | BIT(3))
+#define LM3692X_RAMP_EN BIT(4)
+#define LM3692X_BRHT_MODE_REG 0x00
+#define LM3692X_BRHT_MODE_PWM BIT(5)
+#define LM3692X_BRHT_MODE_MULTI_RAMP BIT(6)
+#define LM3692X_BRHT_MODE_RAMP_MULTI (BIT(5) | BIT(6))
+#define LM3692X_MAP_MODE_EXP BIT(7)
+
+/* PWM Register Bits */
+#define LM3692X_PWM_FILTER_100 BIT(0)
+#define LM3692X_PWM_FILTER_150 BIT(1)
+#define LM3692X_PWM_FILTER_200 (BIT(0) | BIT(1))
+#define LM3692X_PWM_HYSTER_1LSB BIT(2)
+#define LM3692X_PWM_HYSTER_2LSB BIT(3)
+#define LM3692X_PWM_HYSTER_3LSB (BIT(3) | BIT(2))
+#define LM3692X_PWM_HYSTER_4LSB BIT(4)
+#define LM3692X_PWM_HYSTER_5LSB (BIT(4) | BIT(2))
+#define LM3692X_PWM_HYSTER_6LSB (BIT(4) | BIT(3))
+#define LM3692X_PWM_POLARITY BIT(5)
+#define LM3692X_PWM_SAMP_4MHZ BIT(6)
+#define LM3692X_PWM_SAMP_24MHZ BIT(7)
+
+/* Boost Control Bits */
+#define LM3692X_OCP_PROT_1A BIT(0)
+#define LM3692X_OCP_PROT_1_25A BIT(1)
+#define LM3692X_OCP_PROT_1_5A (BIT(0) | BIT(1))
+#define LM3692X_OVP_21V BIT(2)
+#define LM3692X_OVP_25V BIT(3)
+#define LM3692X_OVP_29V (BIT(2) | BIT(3))
+#define LM3692X_MIN_IND_22UH BIT(4)
+#define LM3692X_BOOST_SW_1MHZ BIT(5)
+#define LM3692X_BOOST_SW_NO_SHIFT BIT(6)
+
+/* Fault Control Bits */
+#define LM3692X_FAULT_CTRL_OVP BIT(0)
+#define LM3692X_FAULT_CTRL_OCP BIT(1)
+#define LM3692X_FAULT_CTRL_TSD BIT(2)
+#define LM3692X_FAULT_CTRL_OPEN BIT(3)
+
+/* Fault Flag Bits */
+#define LM3692X_FAULT_FLAG_OVP BIT(0)
+#define LM3692X_FAULT_FLAG_OCP BIT(1)
+#define LM3692X_FAULT_FLAG_TSD BIT(2)
+#define LM3692X_FAULT_FLAG_SHRT BIT(3)
+#define LM3692X_FAULT_FLAG_OPEN BIT(4)
+
+/**
+ * struct lm3692x_led
+ * @lock: Lock for reading/writing the device
+ * @client: Pointer to the I2C client
+ * @led_dev: LED class device pointer
+ * @regmap: Devices register map
+ * @enable_gpio: VDDIO/EN gpio to enable communication interface
+ * @regulator: LED supply regulator pointer
+ * @led_enable: LED sync to be enabled
+ * @model_id: Current device model ID enumerated
+ */
+struct lm3692x_led {
+ struct mutex lock;
+ struct i2c_client *client;
+ struct led_classdev led_dev;
+ struct regmap *regmap;
+ struct gpio_desc *enable_gpio;
+ struct regulator *regulator;
+ int led_enable;
+ int model_id;
+
+ u8 boost_ctrl, brightness_ctrl;
+ bool enabled;
+};
+
+static const struct reg_default lm3692x_reg_defs[] = {
+ {LM3692X_EN, 0xf},
+ {LM3692X_BRT_CTRL, 0x61},
+ {LM3692X_PWM_CTRL, 0x73},
+ {LM3692X_BOOST_CTRL, 0x6f},
+ {LM3692X_AUTO_FREQ_HI, 0x0},
+ {LM3692X_AUTO_FREQ_LO, 0x0},
+ {LM3692X_BL_ADJ_THRESH, 0x0},
+ {LM3692X_BRT_LSB, 0x7},
+ {LM3692X_BRT_MSB, 0xff},
+ {LM3692X_FAULT_CTRL, 0x7},
+};
+
+static const struct regmap_config lm3692x_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LM3692X_FAULT_FLAGS,
+ .reg_defaults = lm3692x_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(lm3692x_reg_defs),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int lm3692x_fault_check(struct lm3692x_led *led)
+{
+ int ret;
+ unsigned int read_buf;
+
+ ret = regmap_read(led->regmap, LM3692X_FAULT_FLAGS, &read_buf);
+ if (ret)
+ return ret;
+
+ if (read_buf)
+ dev_err(&led->client->dev, "Detected a fault 0x%X\n", read_buf);
+
+ /* The first read may clear the fault. Check again to see if the fault
+ * still exits and return that value.
+ */
+ regmap_read(led->regmap, LM3692X_FAULT_FLAGS, &read_buf);
+ if (read_buf)
+ dev_err(&led->client->dev, "Second read of fault flags 0x%X\n",
+ read_buf);
+
+ return read_buf;
+}
+
+static int lm3692x_leds_enable(struct lm3692x_led *led)
+{
+ int enable_state;
+ int ret, reg_ret;
+
+ if (led->enabled)
+ return 0;
+
+ if (led->regulator) {
+ ret = regulator_enable(led->regulator);
+ if (ret) {
+ dev_err(&led->client->dev,
+ "Failed to enable regulator: %d\n", ret);
+ return ret;
+ }
+ }
+
+ if (led->enable_gpio)
+ gpiod_direction_output(led->enable_gpio, 1);
+
+ ret = lm3692x_fault_check(led);
+ if (ret) {
+ dev_err(&led->client->dev, "Cannot read/clear faults: %d\n",
+ ret);
+ goto out;
+ }
+
+ ret = regmap_write(led->regmap, LM3692X_BRT_CTRL, 0x00);
+ if (ret)
+ goto out;
+
+ /*
+ * For glitch free operation, the following data should
+ * only be written while LEDx enable bits are 0 and the device enable
+ * bit is set to 1.
+ * per Section 7.5.14 of the data sheet
+ */
+ ret = regmap_write(led->regmap, LM3692X_EN, LM3692X_DEVICE_EN);
+ if (ret)
+ goto out;
+
+ /* Set the brightness to 0 so when enabled the LEDs do not come
+ * on with full brightness.
+ */
+ ret = regmap_write(led->regmap, LM3692X_BRT_MSB, 0);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(led->regmap, LM3692X_BRT_LSB, 0);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(led->regmap, LM3692X_PWM_CTRL,
+ LM3692X_PWM_FILTER_100 | LM3692X_PWM_SAMP_24MHZ);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(led->regmap, LM3692X_BOOST_CTRL, led->boost_ctrl);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(led->regmap, LM3692X_AUTO_FREQ_HI, 0x00);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(led->regmap, LM3692X_AUTO_FREQ_LO, 0x00);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(led->regmap, LM3692X_BL_ADJ_THRESH, 0x00);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(led->regmap, LM3692X_BRT_CTRL,
+ LM3692X_BL_ADJ_POL | LM3692X_RAMP_EN);
+ if (ret)
+ goto out;
+
+ switch (led->led_enable) {
+ case 0:
+ default:
+ if (led->model_id == LM36923_MODEL)
+ enable_state = LM3692X_LED1_EN | LM3692X_LED2_EN |
+ LM36923_LED3_EN;
+ else
+ enable_state = LM3692X_LED1_EN | LM3692X_LED2_EN;
+
+ break;
+ case 1:
+ enable_state = LM3692X_LED1_EN;
+ break;
+ case 2:
+ enable_state = LM3692X_LED2_EN;
+ break;
+
+ case 3:
+ if (led->model_id == LM36923_MODEL) {
+ enable_state = LM36923_LED3_EN;
+ break;
+ }
+
+ ret = -EINVAL;
+ dev_err(&led->client->dev,
+ "LED3 sync not available on this device\n");
+ goto out;
+ }
+
+ ret = regmap_update_bits(led->regmap, LM3692X_EN, LM3692X_ENABLE_MASK,
+ enable_state | LM3692X_DEVICE_EN);
+
+ led->enabled = true;
+ return ret;
+out:
+ dev_err(&led->client->dev, "Fail writing initialization values\n");
+
+ if (led->enable_gpio)
+ gpiod_direction_output(led->enable_gpio, 0);
+
+ if (led->regulator) {
+ reg_ret = regulator_disable(led->regulator);
+ if (reg_ret)
+ dev_err(&led->client->dev,
+ "Failed to disable regulator: %d\n", reg_ret);
+ }
+
+ return ret;
+}
+
+static int lm3692x_leds_disable(struct lm3692x_led *led)
+{
+ int ret;
+
+ if (!led->enabled)
+ return 0;
+
+ ret = regmap_update_bits(led->regmap, LM3692X_EN, LM3692X_DEVICE_EN, 0);
+ if (ret) {
+ dev_err(&led->client->dev, "Failed to disable regulator: %d\n",
+ ret);
+ return ret;
+ }
+
+ if (led->enable_gpio)
+ gpiod_direction_output(led->enable_gpio, 0);
+
+ if (led->regulator) {
+ ret = regulator_disable(led->regulator);
+ if (ret)
+ dev_err(&led->client->dev,
+ "Failed to disable regulator: %d\n", ret);
+ }
+
+ led->enabled = false;
+ return ret;
+}
+
+static int lm3692x_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brt_val)
+{
+ struct lm3692x_led *led =
+ container_of(led_cdev, struct lm3692x_led, led_dev);
+ int ret;
+ int led_brightness_lsb = (brt_val >> 5);
+
+ mutex_lock(&led->lock);
+
+ if (brt_val == 0) {
+ ret = lm3692x_leds_disable(led);
+ goto out;
+ } else {
+ lm3692x_leds_enable(led);
+ }
+
+ ret = lm3692x_fault_check(led);
+ if (ret) {
+ dev_err(&led->client->dev, "Cannot read/clear faults: %d\n",
+ ret);
+ goto out;
+ }
+
+ ret = regmap_write(led->regmap, LM3692X_BRT_MSB, brt_val);
+ if (ret) {
+ dev_err(&led->client->dev, "Cannot write MSB: %d\n", ret);
+ goto out;
+ }
+
+ ret = regmap_write(led->regmap, LM3692X_BRT_LSB, led_brightness_lsb);
+ if (ret) {
+ dev_err(&led->client->dev, "Cannot write LSB: %d\n", ret);
+ goto out;
+ }
+out:
+ mutex_unlock(&led->lock);
+ return ret;
+}
+
+static enum led_brightness lm3692x_max_brightness(struct lm3692x_led *led,
+ u32 max_cur)
+{
+ u32 max_code;
+
+ /* see p.12 of LM36922 data sheet for brightness formula */
+ max_code = ((max_cur * 1000) - 37806) / 12195;
+ if (max_code > 0x7FF)
+ max_code = 0x7FF;
+
+ return max_code >> 3;
+}
+
+static int lm3692x_probe_dt(struct lm3692x_led *led)
+{
+ struct fwnode_handle *child = NULL;
+ struct led_init_data init_data = {};
+ u32 ovp, max_cur;
+ int ret;
+
+ led->enable_gpio = devm_gpiod_get_optional(&led->client->dev,
+ "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(led->enable_gpio)) {
+ ret = PTR_ERR(led->enable_gpio);
+ dev_err(&led->client->dev, "Failed to get enable gpio: %d\n",
+ ret);
+ return ret;
+ }
+
+ led->regulator = devm_regulator_get_optional(&led->client->dev, "vled");
+ if (IS_ERR(led->regulator)) {
+ ret = PTR_ERR(led->regulator);
+ if (ret != -ENODEV)
+ return dev_err_probe(&led->client->dev, ret,
+ "Failed to get vled regulator\n");
+
+ led->regulator = NULL;
+ }
+
+ led->boost_ctrl = LM3692X_BOOST_SW_1MHZ |
+ LM3692X_BOOST_SW_NO_SHIFT |
+ LM3692X_OCP_PROT_1_5A;
+ ret = device_property_read_u32(&led->client->dev,
+ "ti,ovp-microvolt", &ovp);
+ if (ret) {
+ led->boost_ctrl |= LM3692X_OVP_29V;
+ } else {
+ switch (ovp) {
+ case 17000000:
+ break;
+ case 21000000:
+ led->boost_ctrl |= LM3692X_OVP_21V;
+ break;
+ case 25000000:
+ led->boost_ctrl |= LM3692X_OVP_25V;
+ break;
+ case 29000000:
+ led->boost_ctrl |= LM3692X_OVP_29V;
+ break;
+ default:
+ dev_err(&led->client->dev, "Invalid OVP %d\n", ovp);
+ return -EINVAL;
+ }
+ }
+
+ child = device_get_next_child_node(&led->client->dev, child);
+ if (!child) {
+ dev_err(&led->client->dev, "No LED Child node\n");
+ return -ENODEV;
+ }
+
+ ret = fwnode_property_read_u32(child, "reg", &led->led_enable);
+ if (ret) {
+ fwnode_handle_put(child);
+ dev_err(&led->client->dev, "reg DT property missing\n");
+ return ret;
+ }
+
+ ret = fwnode_property_read_u32(child, "led-max-microamp", &max_cur);
+ led->led_dev.max_brightness = ret ? LED_FULL :
+ lm3692x_max_brightness(led, max_cur);
+
+ init_data.fwnode = child;
+ init_data.devicename = led->client->name;
+ init_data.default_label = ":";
+
+ ret = devm_led_classdev_register_ext(&led->client->dev, &led->led_dev,
+ &init_data);
+ if (ret)
+ dev_err(&led->client->dev, "led register err: %d\n", ret);
+
+ fwnode_handle_put(init_data.fwnode);
+ return ret;
+}
+
+static int lm3692x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lm3692x_led *led;
+ int ret;
+
+ led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ mutex_init(&led->lock);
+ led->client = client;
+ led->led_dev.brightness_set_blocking = lm3692x_brightness_set;
+ led->model_id = id->driver_data;
+ i2c_set_clientdata(client, led);
+
+ led->regmap = devm_regmap_init_i2c(client, &lm3692x_regmap_config);
+ if (IS_ERR(led->regmap)) {
+ ret = PTR_ERR(led->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = lm3692x_probe_dt(led);
+ if (ret)
+ return ret;
+
+ ret = lm3692x_leds_enable(led);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void lm3692x_remove(struct i2c_client *client)
+{
+ struct lm3692x_led *led = i2c_get_clientdata(client);
+
+ lm3692x_leds_disable(led);
+ mutex_destroy(&led->lock);
+}
+
+static const struct i2c_device_id lm3692x_id[] = {
+ { "lm36922", LM36922_MODEL },
+ { "lm36923", LM36923_MODEL },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm3692x_id);
+
+static const struct of_device_id of_lm3692x_leds_match[] = {
+ { .compatible = "ti,lm36922", },
+ { .compatible = "ti,lm36923", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_lm3692x_leds_match);
+
+static struct i2c_driver lm3692x_driver = {
+ .driver = {
+ .name = "lm3692x",
+ .of_match_table = of_lm3692x_leds_match,
+ },
+ .probe = lm3692x_probe,
+ .remove = lm3692x_remove,
+ .id_table = lm3692x_id,
+};
+module_i2c_driver(lm3692x_driver);
+
+MODULE_DESCRIPTION("Texas Instruments LM3692X LED driver");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lm3697.c b/drivers/leds/leds-lm3697.c
new file mode 100644
index 000000000..71231a60e
--- /dev/null
+++ b/drivers/leds/leds-lm3697.c
@@ -0,0 +1,388 @@
+// SPDX-License-Identifier: GPL-2.0
+// TI LM3697 LED chip family driver
+// Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
+
+#include <linux/bits.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/types.h>
+
+#include <linux/leds-ti-lmu-common.h>
+
+#define LM3697_REV 0x0
+#define LM3697_RESET 0x1
+#define LM3697_OUTPUT_CONFIG 0x10
+#define LM3697_CTRL_A_RAMP 0x11
+#define LM3697_CTRL_B_RAMP 0x12
+#define LM3697_CTRL_A_B_RT_RAMP 0x13
+#define LM3697_CTRL_A_B_RAMP_CFG 0x14
+#define LM3697_CTRL_A_B_BRT_CFG 0x16
+#define LM3697_CTRL_A_FS_CURR_CFG 0x17
+#define LM3697_CTRL_B_FS_CURR_CFG 0x18
+#define LM3697_PWM_CFG 0x1c
+#define LM3697_CTRL_A_BRT_LSB 0x20
+#define LM3697_CTRL_A_BRT_MSB 0x21
+#define LM3697_CTRL_B_BRT_LSB 0x22
+#define LM3697_CTRL_B_BRT_MSB 0x23
+#define LM3697_CTRL_ENABLE 0x24
+
+#define LM3697_SW_RESET BIT(0)
+
+#define LM3697_CTRL_A_EN BIT(0)
+#define LM3697_CTRL_B_EN BIT(1)
+#define LM3697_CTRL_A_B_EN (LM3697_CTRL_A_EN | LM3697_CTRL_B_EN)
+
+#define LM3697_MAX_LED_STRINGS 3
+
+#define LM3697_CONTROL_A 0
+#define LM3697_CONTROL_B 1
+#define LM3697_MAX_CONTROL_BANKS 2
+
+/**
+ * struct lm3697_led -
+ * @hvled_strings: Array of LED strings associated with a control bank
+ * @label: LED label
+ * @led_dev: LED class device
+ * @priv: Pointer to the device struct
+ * @lmu_data: Register and setting values for common code
+ * @control_bank: Control bank the LED is associated to. 0 is control bank A
+ * 1 is control bank B
+ * @enabled: LED brightness level (or LED_OFF)
+ * @num_leds: Number of LEDs available
+ */
+struct lm3697_led {
+ u32 hvled_strings[LM3697_MAX_LED_STRINGS];
+ char label[LED_MAX_NAME_SIZE];
+ struct led_classdev led_dev;
+ struct lm3697 *priv;
+ struct ti_lmu_bank lmu_data;
+ int control_bank;
+ int enabled;
+ int num_leds;
+};
+
+/**
+ * struct lm3697 -
+ * @enable_gpio: Hardware enable gpio
+ * @regulator: LED supply regulator pointer
+ * @client: Pointer to the I2C client
+ * @regmap: Devices register map
+ * @dev: Pointer to the devices device struct
+ * @lock: Lock for reading/writing the device
+ * @leds: Array of LED strings
+ * @bank_cfg: OUTPUT_CONFIG register values
+ * @num_banks: Number of control banks
+ */
+struct lm3697 {
+ struct gpio_desc *enable_gpio;
+ struct regulator *regulator;
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct device *dev;
+ struct mutex lock;
+
+ int bank_cfg;
+ int num_banks;
+
+ struct lm3697_led leds[];
+};
+
+static const struct reg_default lm3697_reg_defs[] = {
+ {LM3697_OUTPUT_CONFIG, 0x6},
+ {LM3697_CTRL_A_RAMP, 0x0},
+ {LM3697_CTRL_B_RAMP, 0x0},
+ {LM3697_CTRL_A_B_RT_RAMP, 0x0},
+ {LM3697_CTRL_A_B_RAMP_CFG, 0x0},
+ {LM3697_CTRL_A_B_BRT_CFG, 0x0},
+ {LM3697_CTRL_A_FS_CURR_CFG, 0x13},
+ {LM3697_CTRL_B_FS_CURR_CFG, 0x13},
+ {LM3697_PWM_CFG, 0xc},
+ {LM3697_CTRL_A_BRT_LSB, 0x0},
+ {LM3697_CTRL_A_BRT_MSB, 0x0},
+ {LM3697_CTRL_B_BRT_LSB, 0x0},
+ {LM3697_CTRL_B_BRT_MSB, 0x0},
+ {LM3697_CTRL_ENABLE, 0x0},
+};
+
+static const struct regmap_config lm3697_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LM3697_CTRL_ENABLE,
+ .reg_defaults = lm3697_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(lm3697_reg_defs),
+ .cache_type = REGCACHE_FLAT,
+};
+
+static int lm3697_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brt_val)
+{
+ struct lm3697_led *led = container_of(led_cdev, struct lm3697_led,
+ led_dev);
+ int ctrl_en_val = (1 << led->control_bank);
+ struct device *dev = led->priv->dev;
+ int ret;
+
+ mutex_lock(&led->priv->lock);
+
+ if (brt_val == LED_OFF) {
+ ret = regmap_update_bits(led->priv->regmap, LM3697_CTRL_ENABLE,
+ ctrl_en_val, ~ctrl_en_val);
+ if (ret) {
+ dev_err(dev, "Cannot write ctrl register\n");
+ goto brightness_out;
+ }
+
+ led->enabled = LED_OFF;
+ } else {
+ ret = ti_lmu_common_set_brightness(&led->lmu_data, brt_val);
+ if (ret) {
+ dev_err(dev, "Cannot write brightness\n");
+ goto brightness_out;
+ }
+
+ if (!led->enabled) {
+ ret = regmap_update_bits(led->priv->regmap,
+ LM3697_CTRL_ENABLE,
+ ctrl_en_val, ctrl_en_val);
+ if (ret) {
+ dev_err(dev, "Cannot enable the device\n");
+ goto brightness_out;
+ }
+
+ led->enabled = brt_val;
+ }
+ }
+
+brightness_out:
+ mutex_unlock(&led->priv->lock);
+ return ret;
+}
+
+static int lm3697_init(struct lm3697 *priv)
+{
+ struct device *dev = priv->dev;
+ struct lm3697_led *led;
+ int i, ret;
+
+ if (priv->enable_gpio) {
+ gpiod_direction_output(priv->enable_gpio, 1);
+ } else {
+ ret = regmap_write(priv->regmap, LM3697_RESET, LM3697_SW_RESET);
+ if (ret) {
+ dev_err(dev, "Cannot reset the device\n");
+ goto out;
+ }
+ }
+
+ ret = regmap_write(priv->regmap, LM3697_CTRL_ENABLE, 0x0);
+ if (ret) {
+ dev_err(dev, "Cannot write ctrl enable\n");
+ goto out;
+ }
+
+ ret = regmap_write(priv->regmap, LM3697_OUTPUT_CONFIG, priv->bank_cfg);
+ if (ret)
+ dev_err(dev, "Cannot write OUTPUT config\n");
+
+ for (i = 0; i < priv->num_banks; i++) {
+ led = &priv->leds[i];
+ ret = ti_lmu_common_set_ramp(&led->lmu_data);
+ if (ret)
+ dev_err(dev, "Setting the ramp rate failed\n");
+ }
+out:
+ return ret;
+}
+
+static int lm3697_probe_dt(struct lm3697 *priv)
+{
+ struct fwnode_handle *child = NULL;
+ struct device *dev = priv->dev;
+ struct lm3697_led *led;
+ int ret = -EINVAL;
+ int control_bank;
+ size_t i = 0;
+ int j;
+
+ priv->enable_gpio = devm_gpiod_get_optional(dev, "enable",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(priv->enable_gpio))
+ return dev_err_probe(dev, PTR_ERR(priv->enable_gpio),
+ "Failed to get enable GPIO\n");
+
+ priv->regulator = devm_regulator_get(dev, "vled");
+ if (IS_ERR(priv->regulator))
+ priv->regulator = NULL;
+
+ device_for_each_child_node(dev, child) {
+ struct led_init_data init_data = {};
+
+ ret = fwnode_property_read_u32(child, "reg", &control_bank);
+ if (ret) {
+ dev_err(dev, "reg property missing\n");
+ goto child_out;
+ }
+
+ if (control_bank > LM3697_CONTROL_B) {
+ dev_err(dev, "reg property is invalid\n");
+ ret = -EINVAL;
+ goto child_out;
+ }
+
+ led = &priv->leds[i];
+
+ ret = ti_lmu_common_get_brt_res(dev, child, &led->lmu_data);
+ if (ret)
+ dev_warn(dev,
+ "brightness resolution property missing\n");
+
+ led->control_bank = control_bank;
+ led->lmu_data.regmap = priv->regmap;
+ led->lmu_data.runtime_ramp_reg = LM3697_CTRL_A_RAMP +
+ control_bank;
+ led->lmu_data.msb_brightness_reg = LM3697_CTRL_A_BRT_MSB +
+ led->control_bank * 2;
+ led->lmu_data.lsb_brightness_reg = LM3697_CTRL_A_BRT_LSB +
+ led->control_bank * 2;
+
+ led->num_leds = fwnode_property_count_u32(child, "led-sources");
+ if (led->num_leds > LM3697_MAX_LED_STRINGS) {
+ dev_err(dev, "Too many LED strings defined\n");
+ continue;
+ }
+
+ ret = fwnode_property_read_u32_array(child, "led-sources",
+ led->hvled_strings,
+ led->num_leds);
+ if (ret) {
+ dev_err(dev, "led-sources property missing\n");
+ goto child_out;
+ }
+
+ for (j = 0; j < led->num_leds; j++)
+ priv->bank_cfg |=
+ (led->control_bank << led->hvled_strings[j]);
+
+ ret = ti_lmu_common_get_ramp_params(dev, child, &led->lmu_data);
+ if (ret)
+ dev_warn(dev, "runtime-ramp properties missing\n");
+
+ init_data.fwnode = child;
+ init_data.devicename = priv->client->name;
+ /* for backwards compatibility if `label` is not present */
+ init_data.default_label = ":";
+
+ led->priv = priv;
+ led->led_dev.max_brightness = led->lmu_data.max_brightness;
+ led->led_dev.brightness_set_blocking = lm3697_brightness_set;
+
+ ret = devm_led_classdev_register_ext(dev, &led->led_dev,
+ &init_data);
+ if (ret) {
+ dev_err(dev, "led register err: %d\n", ret);
+ goto child_out;
+ }
+
+ i++;
+ }
+
+ return ret;
+
+child_out:
+ fwnode_handle_put(child);
+ return ret;
+}
+
+static int lm3697_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct lm3697 *led;
+ int count;
+ int ret;
+
+ count = device_get_child_node_count(dev);
+ if (!count || count > LM3697_MAX_CONTROL_BANKS) {
+ dev_err(dev, "Strange device tree!");
+ return -ENODEV;
+ }
+
+ led = devm_kzalloc(dev, struct_size(led, leds, count), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ mutex_init(&led->lock);
+ i2c_set_clientdata(client, led);
+
+ led->client = client;
+ led->dev = dev;
+ led->num_banks = count;
+ led->regmap = devm_regmap_init_i2c(client, &lm3697_regmap_config);
+ if (IS_ERR(led->regmap)) {
+ ret = PTR_ERR(led->regmap);
+ dev_err(dev, "Failed to allocate register map: %d\n", ret);
+ return ret;
+ }
+
+ ret = lm3697_probe_dt(led);
+ if (ret)
+ return ret;
+
+ return lm3697_init(led);
+}
+
+static void lm3697_remove(struct i2c_client *client)
+{
+ struct lm3697 *led = i2c_get_clientdata(client);
+ struct device *dev = &led->client->dev;
+ int ret;
+
+ ret = regmap_update_bits(led->regmap, LM3697_CTRL_ENABLE,
+ LM3697_CTRL_A_B_EN, 0);
+ if (ret)
+ dev_err(dev, "Failed to disable the device\n");
+
+ if (led->enable_gpio)
+ gpiod_direction_output(led->enable_gpio, 0);
+
+ if (led->regulator) {
+ ret = regulator_disable(led->regulator);
+ if (ret)
+ dev_err(dev, "Failed to disable regulator\n");
+ }
+
+ mutex_destroy(&led->lock);
+}
+
+static const struct i2c_device_id lm3697_id[] = {
+ { "lm3697", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm3697_id);
+
+static const struct of_device_id of_lm3697_leds_match[] = {
+ { .compatible = "ti,lm3697", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_lm3697_leds_match);
+
+static struct i2c_driver lm3697_driver = {
+ .driver = {
+ .name = "lm3697",
+ .of_match_table = of_lm3697_leds_match,
+ },
+ .probe = lm3697_probe,
+ .remove = lm3697_remove,
+ .id_table = lm3697_id,
+};
+module_i2c_driver(lm3697_driver);
+
+MODULE_DESCRIPTION("Texas Instruments LM3697 LED driver");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-locomo.c b/drivers/leds/leds-locomo.c
new file mode 100644
index 000000000..9aa3fccd7
--- /dev/null
+++ b/drivers/leds/leds-locomo.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/drivers/leds/leds-locomo.c
+ *
+ * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/leds.h>
+
+#include <asm/hardware/locomo.h>
+
+static void locomoled_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value, int offset)
+{
+ struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev->parent);
+ unsigned long flags;
+
+ local_irq_save(flags);
+ if (value)
+ locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset);
+ else
+ locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset);
+ local_irq_restore(flags);
+}
+
+static void locomoled_brightness_set0(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0);
+}
+
+static void locomoled_brightness_set1(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1);
+}
+
+static struct led_classdev locomo_led0 = {
+ .name = "locomo:amber:charge",
+ .default_trigger = "main-battery-charging",
+ .brightness_set = locomoled_brightness_set0,
+};
+
+static struct led_classdev locomo_led1 = {
+ .name = "locomo:green:mail",
+ .default_trigger = "nand-disk",
+ .brightness_set = locomoled_brightness_set1,
+};
+
+static int locomoled_probe(struct locomo_dev *ldev)
+{
+ int ret;
+
+ ret = devm_led_classdev_register(&ldev->dev, &locomo_led0);
+ if (ret < 0)
+ return ret;
+
+ return devm_led_classdev_register(&ldev->dev, &locomo_led1);
+}
+
+
+static struct locomo_driver locomoled_driver = {
+ .drv = {
+ .name = "locomoled"
+ },
+ .devid = LOCOMO_DEVID_LED,
+ .probe = locomoled_probe,
+};
+
+static int __init locomoled_init(void)
+{
+ return locomo_driver_register(&locomoled_driver);
+}
+module_init(locomoled_init);
+
+MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
+MODULE_DESCRIPTION("Locomo LED driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-lp3944.c b/drivers/leds/leds-lp3944.c
new file mode 100644
index 000000000..673ad8c04
--- /dev/null
+++ b/drivers/leds/leds-lp3944.c
@@ -0,0 +1,440 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * leds-lp3944.c - driver for National Semiconductor LP3944 Funlight Chip
+ *
+ * Copyright (C) 2009 Antonio Ospite <ospite@studenti.unina.it>
+ */
+
+/*
+ * I2C driver for National Semiconductor LP3944 Funlight Chip
+ * http://www.national.com/pf/LP/LP3944.html
+ *
+ * This helper chip can drive up to 8 leds, with two programmable DIM modes;
+ * it could even be used as a gpio expander but this driver assumes it is used
+ * as a led controller.
+ *
+ * The DIM modes are used to set _blink_ patterns for leds, the pattern is
+ * specified supplying two parameters:
+ * - period: from 0s to 1.6s
+ * - duty cycle: percentage of the period the led is on, from 0 to 100
+ *
+ * LP3944 can be found on Motorola A910 smartphone, where it drives the rgb
+ * leds, the camera flash light and the displays backlights.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+#include <linux/mutex.h>
+#include <linux/leds-lp3944.h>
+
+/* Read Only Registers */
+#define LP3944_REG_INPUT1 0x00 /* LEDs 0-7 InputRegister (Read Only) */
+#define LP3944_REG_REGISTER1 0x01 /* None (Read Only) */
+
+#define LP3944_REG_PSC0 0x02 /* Frequency Prescaler 0 (R/W) */
+#define LP3944_REG_PWM0 0x03 /* PWM Register 0 (R/W) */
+#define LP3944_REG_PSC1 0x04 /* Frequency Prescaler 1 (R/W) */
+#define LP3944_REG_PWM1 0x05 /* PWM Register 1 (R/W) */
+#define LP3944_REG_LS0 0x06 /* LEDs 0-3 Selector (R/W) */
+#define LP3944_REG_LS1 0x07 /* LEDs 4-7 Selector (R/W) */
+
+/* These registers are not used to control leds in LP3944, they can store
+ * arbitrary values which the chip will ignore.
+ */
+#define LP3944_REG_REGISTER8 0x08
+#define LP3944_REG_REGISTER9 0x09
+
+#define LP3944_DIM0 0
+#define LP3944_DIM1 1
+
+/* period in ms */
+#define LP3944_PERIOD_MIN 0
+#define LP3944_PERIOD_MAX 1600
+
+/* duty cycle is a percentage */
+#define LP3944_DUTY_CYCLE_MIN 0
+#define LP3944_DUTY_CYCLE_MAX 100
+
+#define ldev_to_led(c) container_of(c, struct lp3944_led_data, ldev)
+
+/* Saved data */
+struct lp3944_led_data {
+ u8 id;
+ enum lp3944_type type;
+ struct led_classdev ldev;
+ struct i2c_client *client;
+};
+
+struct lp3944_data {
+ struct mutex lock;
+ struct i2c_client *client;
+ struct lp3944_led_data leds[LP3944_LEDS_MAX];
+};
+
+static int lp3944_reg_read(struct i2c_client *client, u8 reg, u8 *value)
+{
+ int tmp;
+
+ tmp = i2c_smbus_read_byte_data(client, reg);
+ if (tmp < 0)
+ return tmp;
+
+ *value = tmp;
+
+ return 0;
+}
+
+static int lp3944_reg_write(struct i2c_client *client, u8 reg, u8 value)
+{
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+/**
+ * lp3944_dim_set_period() - Set the period for DIM status
+ *
+ * @client: the i2c client
+ * @dim: either LP3944_DIM0 or LP3944_DIM1
+ * @period: period of a blink, that is a on/off cycle, expressed in ms.
+ */
+static int lp3944_dim_set_period(struct i2c_client *client, u8 dim, u16 period)
+{
+ u8 psc_reg;
+ u8 psc_value;
+ int err;
+
+ if (dim == LP3944_DIM0)
+ psc_reg = LP3944_REG_PSC0;
+ else if (dim == LP3944_DIM1)
+ psc_reg = LP3944_REG_PSC1;
+ else
+ return -EINVAL;
+
+ /* Convert period to Prescaler value */
+ if (period > LP3944_PERIOD_MAX)
+ return -EINVAL;
+
+ psc_value = (period * 255) / LP3944_PERIOD_MAX;
+
+ err = lp3944_reg_write(client, psc_reg, psc_value);
+
+ return err;
+}
+
+/**
+ * lp3944_dim_set_dutycycle - Set the duty cycle for DIM status
+ *
+ * @client: the i2c client
+ * @dim: either LP3944_DIM0 or LP3944_DIM1
+ * @duty_cycle: percentage of a period during which a led is ON
+ */
+static int lp3944_dim_set_dutycycle(struct i2c_client *client, u8 dim,
+ u8 duty_cycle)
+{
+ u8 pwm_reg;
+ u8 pwm_value;
+ int err;
+
+ if (dim == LP3944_DIM0)
+ pwm_reg = LP3944_REG_PWM0;
+ else if (dim == LP3944_DIM1)
+ pwm_reg = LP3944_REG_PWM1;
+ else
+ return -EINVAL;
+
+ /* Convert duty cycle to PWM value */
+ if (duty_cycle > LP3944_DUTY_CYCLE_MAX)
+ return -EINVAL;
+
+ pwm_value = (duty_cycle * 255) / LP3944_DUTY_CYCLE_MAX;
+
+ err = lp3944_reg_write(client, pwm_reg, pwm_value);
+
+ return err;
+}
+
+/**
+ * lp3944_led_set() - Set the led status
+ *
+ * @led: a lp3944_led_data structure
+ * @status: one of LP3944_LED_STATUS_OFF
+ * LP3944_LED_STATUS_ON
+ * LP3944_LED_STATUS_DIM0
+ * LP3944_LED_STATUS_DIM1
+ */
+static int lp3944_led_set(struct lp3944_led_data *led, u8 status)
+{
+ struct lp3944_data *data = i2c_get_clientdata(led->client);
+ u8 id = led->id;
+ u8 reg;
+ u8 val = 0;
+ int err;
+
+ dev_dbg(&led->client->dev, "%s: %s, status before normalization:%d\n",
+ __func__, led->ldev.name, status);
+
+ switch (id) {
+ case LP3944_LED0:
+ case LP3944_LED1:
+ case LP3944_LED2:
+ case LP3944_LED3:
+ reg = LP3944_REG_LS0;
+ break;
+ case LP3944_LED4:
+ case LP3944_LED5:
+ case LP3944_LED6:
+ case LP3944_LED7:
+ id -= LP3944_LED4;
+ reg = LP3944_REG_LS1;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (status > LP3944_LED_STATUS_DIM1)
+ return -EINVAL;
+
+ /*
+ * Invert status only when it's < 2 (i.e. 0 or 1) which means it's
+ * controlling the on/off state directly.
+ * When, instead, status is >= 2 don't invert it because it would mean
+ * to mess with the hardware blinking mode.
+ */
+ if (led->type == LP3944_LED_TYPE_LED_INVERTED && status < 2)
+ status = 1 - status;
+
+ mutex_lock(&data->lock);
+ lp3944_reg_read(led->client, reg, &val);
+
+ val &= ~(LP3944_LED_STATUS_MASK << (id << 1));
+ val |= (status << (id << 1));
+
+ dev_dbg(&led->client->dev, "%s: %s, reg:%d id:%d status:%d val:%#x\n",
+ __func__, led->ldev.name, reg, id, status, val);
+
+ /* set led status */
+ err = lp3944_reg_write(led->client, reg, val);
+ mutex_unlock(&data->lock);
+
+ return err;
+}
+
+static int lp3944_led_set_blink(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct lp3944_led_data *led = ldev_to_led(led_cdev);
+ u16 period;
+ u8 duty_cycle;
+ int err;
+
+ /* units are in ms */
+ if (*delay_on + *delay_off > LP3944_PERIOD_MAX)
+ return -EINVAL;
+
+ if (*delay_on == 0 && *delay_off == 0) {
+ /* Special case: the leds subsystem requires a default user
+ * friendly blink pattern for the LED. Let's blink the led
+ * slowly (1Hz).
+ */
+ *delay_on = 500;
+ *delay_off = 500;
+ }
+
+ period = (*delay_on) + (*delay_off);
+
+ /* duty_cycle is the percentage of period during which the led is ON */
+ duty_cycle = 100 * (*delay_on) / period;
+
+ /* invert duty cycle for inverted leds, this has the same effect of
+ * swapping delay_on and delay_off
+ */
+ if (led->type == LP3944_LED_TYPE_LED_INVERTED)
+ duty_cycle = 100 - duty_cycle;
+
+ /* NOTE: using always the first DIM mode, this means that all leds
+ * will have the same blinking pattern.
+ *
+ * We could find a way later to have two leds blinking in hardware
+ * with different patterns at the same time, falling back to software
+ * control for the other ones.
+ */
+ err = lp3944_dim_set_period(led->client, LP3944_DIM0, period);
+ if (err)
+ return err;
+
+ err = lp3944_dim_set_dutycycle(led->client, LP3944_DIM0, duty_cycle);
+ if (err)
+ return err;
+
+ dev_dbg(&led->client->dev, "%s: OK hardware accelerated blink!\n",
+ __func__);
+
+ lp3944_led_set(led, LP3944_LED_STATUS_DIM0);
+
+ return 0;
+}
+
+static int lp3944_led_set_brightness(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct lp3944_led_data *led = ldev_to_led(led_cdev);
+
+ dev_dbg(&led->client->dev, "%s: %s, %d\n",
+ __func__, led_cdev->name, brightness);
+
+ return lp3944_led_set(led, !!brightness);
+}
+
+static int lp3944_configure(struct i2c_client *client,
+ struct lp3944_data *data,
+ struct lp3944_platform_data *pdata)
+{
+ int i, err = 0;
+
+ for (i = 0; i < pdata->leds_size; i++) {
+ struct lp3944_led *pled = &pdata->leds[i];
+ struct lp3944_led_data *led = &data->leds[i];
+ led->client = client;
+ led->id = i;
+
+ switch (pled->type) {
+
+ case LP3944_LED_TYPE_LED:
+ case LP3944_LED_TYPE_LED_INVERTED:
+ led->type = pled->type;
+ led->ldev.name = pled->name;
+ led->ldev.max_brightness = 1;
+ led->ldev.brightness_set_blocking =
+ lp3944_led_set_brightness;
+ led->ldev.blink_set = lp3944_led_set_blink;
+ led->ldev.flags = LED_CORE_SUSPENDRESUME;
+
+ err = led_classdev_register(&client->dev, &led->ldev);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "couldn't register LED %s\n",
+ led->ldev.name);
+ goto exit;
+ }
+
+ /* to expose the default value to userspace */
+ led->ldev.brightness =
+ (enum led_brightness) pled->status;
+
+ /* Set the default led status */
+ err = lp3944_led_set(led, pled->status);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "%s couldn't set STATUS %d\n",
+ led->ldev.name, pled->status);
+ goto exit;
+ }
+ break;
+
+ case LP3944_LED_TYPE_NONE:
+ default:
+ break;
+
+ }
+ }
+ return 0;
+
+exit:
+ if (i > 0)
+ for (i = i - 1; i >= 0; i--)
+ switch (pdata->leds[i].type) {
+
+ case LP3944_LED_TYPE_LED:
+ case LP3944_LED_TYPE_LED_INVERTED:
+ led_classdev_unregister(&data->leds[i].ldev);
+ break;
+
+ case LP3944_LED_TYPE_NONE:
+ default:
+ break;
+ }
+
+ return err;
+}
+
+static int lp3944_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lp3944_platform_data *lp3944_pdata =
+ dev_get_platdata(&client->dev);
+ struct lp3944_data *data;
+ int err;
+
+ if (lp3944_pdata == NULL) {
+ dev_err(&client->dev, "no platform data\n");
+ return -EINVAL;
+ }
+
+ /* Let's see whether this adapter can support what we need. */
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_err(&client->dev, "insufficient functionality!\n");
+ return -ENODEV;
+ }
+
+ data = devm_kzalloc(&client->dev, sizeof(struct lp3944_data),
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->client = client;
+ i2c_set_clientdata(client, data);
+
+ mutex_init(&data->lock);
+
+ err = lp3944_configure(client, data, lp3944_pdata);
+ if (err < 0)
+ return err;
+
+ dev_info(&client->dev, "lp3944 enabled\n");
+ return 0;
+}
+
+static void lp3944_remove(struct i2c_client *client)
+{
+ struct lp3944_platform_data *pdata = dev_get_platdata(&client->dev);
+ struct lp3944_data *data = i2c_get_clientdata(client);
+ int i;
+
+ for (i = 0; i < pdata->leds_size; i++)
+ switch (data->leds[i].type) {
+ case LP3944_LED_TYPE_LED:
+ case LP3944_LED_TYPE_LED_INVERTED:
+ led_classdev_unregister(&data->leds[i].ldev);
+ break;
+
+ case LP3944_LED_TYPE_NONE:
+ default:
+ break;
+ }
+}
+
+/* lp3944 i2c driver struct */
+static const struct i2c_device_id lp3944_id[] = {
+ {"lp3944", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, lp3944_id);
+
+static struct i2c_driver lp3944_driver = {
+ .driver = {
+ .name = "lp3944",
+ },
+ .probe = lp3944_probe,
+ .remove = lp3944_remove,
+ .id_table = lp3944_id,
+};
+
+module_i2c_driver(lp3944_driver);
+
+MODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>");
+MODULE_DESCRIPTION("LP3944 Fun Light Chip");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-lp3952.c b/drivers/leds/leds-lp3952.c
new file mode 100644
index 000000000..bf0ad1b5c
--- /dev/null
+++ b/drivers/leds/leds-lp3952.c
@@ -0,0 +1,286 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED driver for TI lp3952 controller
+ *
+ * Copyright (C) 2016, DAQRI, LLC.
+ * Author: Tony Makkiel <tony.makkiel@daqri.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/leds-lp3952.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+
+static int lp3952_register_write(struct i2c_client *client, u8 reg, u8 val)
+{
+ int ret;
+ struct lp3952_led_array *priv = i2c_get_clientdata(client);
+
+ ret = regmap_write(priv->regmap, reg, val);
+
+ if (ret)
+ dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
+ __func__, reg, val, ret);
+ return ret;
+}
+
+static void lp3952_on_off(struct lp3952_led_array *priv,
+ enum lp3952_leds led_id, bool on)
+{
+ int ret, val;
+
+ dev_dbg(&priv->client->dev, "%s LED %d to %d\n", __func__, led_id, on);
+
+ val = 1 << led_id;
+ if (led_id == LP3952_LED_ALL)
+ val = LP3952_LED_MASK_ALL;
+
+ ret = regmap_update_bits(priv->regmap, LP3952_REG_LED_CTRL, val,
+ on ? val : 0);
+ if (ret)
+ dev_err(&priv->client->dev, "%s, Error %d\n", __func__, ret);
+}
+
+/*
+ * Using Imax to control brightness. There are 4 possible
+ * setting 25, 50, 75 and 100 % of Imax. Possible values are
+ * values 0-4. 0 meaning turn off.
+ */
+static int lp3952_set_brightness(struct led_classdev *cdev,
+ enum led_brightness value)
+{
+ unsigned int reg, shift_val;
+ struct lp3952_ctrl_hdl *led = container_of(cdev,
+ struct lp3952_ctrl_hdl,
+ cdev);
+ struct lp3952_led_array *priv = (struct lp3952_led_array *)led->priv;
+
+ dev_dbg(cdev->dev, "Brightness request: %d on %d\n", value,
+ led->channel);
+
+ if (value == LED_OFF) {
+ lp3952_on_off(priv, led->channel, false);
+ return 0;
+ }
+
+ if (led->channel > LP3952_RED_1) {
+ dev_err(cdev->dev, " %s Invalid LED requested", __func__);
+ return -EINVAL;
+ }
+
+ if (led->channel >= LP3952_BLUE_1) {
+ reg = LP3952_REG_RGB1_MAX_I_CTRL;
+ shift_val = (led->channel - LP3952_BLUE_1) * 2;
+ } else {
+ reg = LP3952_REG_RGB2_MAX_I_CTRL;
+ shift_val = led->channel * 2;
+ }
+
+ /* Enable the LED in case it is not enabled already */
+ lp3952_on_off(priv, led->channel, true);
+
+ return regmap_update_bits(priv->regmap, reg, 3 << shift_val,
+ --value << shift_val);
+}
+
+static int lp3952_get_label(struct device *dev, const char *label, char *dest)
+{
+ int ret;
+ const char *str;
+
+ ret = device_property_read_string(dev, label, &str);
+ if (ret)
+ return ret;
+
+ strncpy(dest, str, LP3952_LABEL_MAX_LEN);
+ return 0;
+}
+
+static int lp3952_register_led_classdev(struct lp3952_led_array *priv)
+{
+ int i, acpi_ret, ret = -ENODEV;
+ static const char *led_name_hdl[LP3952_LED_ALL] = {
+ "blue2",
+ "green2",
+ "red2",
+ "blue1",
+ "green1",
+ "red1"
+ };
+
+ for (i = 0; i < LP3952_LED_ALL; i++) {
+ acpi_ret = lp3952_get_label(&priv->client->dev, led_name_hdl[i],
+ priv->leds[i].name);
+ if (acpi_ret)
+ continue;
+
+ priv->leds[i].cdev.name = priv->leds[i].name;
+ priv->leds[i].cdev.brightness = LED_OFF;
+ priv->leds[i].cdev.max_brightness = LP3952_BRIGHT_MAX;
+ priv->leds[i].cdev.brightness_set_blocking =
+ lp3952_set_brightness;
+ priv->leds[i].channel = i;
+ priv->leds[i].priv = priv;
+
+ ret = devm_led_classdev_register(&priv->client->dev,
+ &priv->leds[i].cdev);
+ if (ret < 0) {
+ dev_err(&priv->client->dev,
+ "couldn't register LED %s\n",
+ priv->leds[i].cdev.name);
+ break;
+ }
+ }
+ return ret;
+}
+
+static int lp3952_set_pattern_gen_cmd(struct lp3952_led_array *priv,
+ u8 cmd_index, u8 r, u8 g, u8 b,
+ enum lp3952_tt tt, enum lp3952_cet cet)
+{
+ int ret;
+ struct ptrn_gen_cmd line = {
+ {
+ {
+ .r = r,
+ .g = g,
+ .b = b,
+ .cet = cet,
+ .tt = tt
+ }
+ }
+ };
+
+ if (cmd_index >= LP3952_CMD_REG_COUNT)
+ return -EINVAL;
+
+ ret = lp3952_register_write(priv->client,
+ LP3952_REG_CMD_0 + cmd_index * 2,
+ line.bytes.msb);
+ if (ret)
+ return ret;
+
+ return lp3952_register_write(priv->client,
+ LP3952_REG_CMD_0 + cmd_index * 2 + 1,
+ line.bytes.lsb);
+}
+
+static int lp3952_configure(struct lp3952_led_array *priv)
+{
+ int ret;
+
+ /* Disable any LEDs on from any previous conf. */
+ ret = lp3952_register_write(priv->client, LP3952_REG_LED_CTRL, 0);
+ if (ret)
+ return ret;
+
+ /* enable rgb patter, loop */
+ ret = lp3952_register_write(priv->client, LP3952_REG_PAT_GEN_CTRL,
+ LP3952_PATRN_LOOP | LP3952_PATRN_GEN_EN);
+ if (ret)
+ return ret;
+
+ /* Update Bit 6 (Active mode), Select both Led sets, Bit [1:0] */
+ ret = lp3952_register_write(priv->client, LP3952_REG_ENABLES,
+ LP3952_ACTIVE_MODE | LP3952_INT_B00ST_LDR);
+ if (ret)
+ return ret;
+
+ /* Set Cmd1 for RGB intensity,cmd and transition time */
+ return lp3952_set_pattern_gen_cmd(priv, 0, I46, I71, I100, TT0,
+ CET197);
+}
+
+static const struct regmap_config lp3952_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = REG_MAX,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int lp3952_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int status;
+ struct lp3952_led_array *priv;
+
+ priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->client = client;
+
+ priv->enable_gpio = devm_gpiod_get(&client->dev, "nrst",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(priv->enable_gpio)) {
+ status = PTR_ERR(priv->enable_gpio);
+ dev_err(&client->dev, "Failed to enable gpio: %d\n", status);
+ return status;
+ }
+
+ priv->regmap = devm_regmap_init_i2c(client, &lp3952_regmap);
+ if (IS_ERR(priv->regmap)) {
+ int err = PTR_ERR(priv->regmap);
+
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ err);
+ return err;
+ }
+
+ i2c_set_clientdata(client, priv);
+
+ status = lp3952_configure(priv);
+ if (status) {
+ dev_err(&client->dev, "Probe failed. Device not found (%d)\n",
+ status);
+ return status;
+ }
+
+ status = lp3952_register_led_classdev(priv);
+ if (status) {
+ dev_err(&client->dev, "Unable to register led_classdev: %d\n",
+ status);
+ return status;
+ }
+
+ return 0;
+}
+
+static void lp3952_remove(struct i2c_client *client)
+{
+ struct lp3952_led_array *priv;
+
+ priv = i2c_get_clientdata(client);
+ lp3952_on_off(priv, LP3952_LED_ALL, false);
+ gpiod_set_value(priv->enable_gpio, 0);
+}
+
+static const struct i2c_device_id lp3952_id[] = {
+ {LP3952_NAME, 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, lp3952_id);
+
+static struct i2c_driver lp3952_i2c_driver = {
+ .driver = {
+ .name = LP3952_NAME,
+ },
+ .probe = lp3952_probe,
+ .remove = lp3952_remove,
+ .id_table = lp3952_id,
+};
+
+module_i2c_driver(lp3952_i2c_driver);
+
+MODULE_AUTHOR("Tony Makkiel <tony.makkiel@daqri.com>");
+MODULE_DESCRIPTION("lp3952 I2C LED controller driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lp50xx.c b/drivers/leds/leds-lp50xx.c
new file mode 100644
index 000000000..28d6b39fa
--- /dev/null
+++ b/drivers/leds/leds-lp50xx.c
@@ -0,0 +1,619 @@
+// SPDX-License-Identifier: GPL-2.0
+// TI LP50XX LED chip family driver
+// Copyright (C) 2018-20 Texas Instruments Incorporated - https://www.ti.com/
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <uapi/linux/uleds.h>
+
+#include <linux/led-class-multicolor.h>
+
+#include "leds.h"
+
+#define LP50XX_DEV_CFG0 0x00
+#define LP50XX_DEV_CFG1 0x01
+#define LP50XX_LED_CFG0 0x02
+
+/* LP5009 and LP5012 registers */
+#define LP5012_BNK_BRT 0x03
+#define LP5012_BNKA_CLR 0x04
+#define LP5012_BNKB_CLR 0x05
+#define LP5012_BNKC_CLR 0x06
+#define LP5012_LED0_BRT 0x07
+#define LP5012_OUT0_CLR 0x0b
+#define LP5012_RESET 0x17
+
+/* LP5018 and LP5024 registers */
+#define LP5024_BNK_BRT 0x03
+#define LP5024_BNKA_CLR 0x04
+#define LP5024_BNKB_CLR 0x05
+#define LP5024_BNKC_CLR 0x06
+#define LP5024_LED0_BRT 0x07
+#define LP5024_OUT0_CLR 0x0f
+#define LP5024_RESET 0x27
+
+/* LP5030 and LP5036 registers */
+#define LP5036_LED_CFG1 0x03
+#define LP5036_BNK_BRT 0x04
+#define LP5036_BNKA_CLR 0x05
+#define LP5036_BNKB_CLR 0x06
+#define LP5036_BNKC_CLR 0x07
+#define LP5036_LED0_BRT 0x08
+#define LP5036_OUT0_CLR 0x14
+#define LP5036_RESET 0x38
+
+#define LP50XX_SW_RESET 0xff
+#define LP50XX_CHIP_EN BIT(6)
+
+/* There are 3 LED outputs per bank */
+#define LP50XX_LEDS_PER_MODULE 3
+
+#define LP5009_MAX_LED_MODULES 2
+#define LP5012_MAX_LED_MODULES 4
+#define LP5018_MAX_LED_MODULES 6
+#define LP5024_MAX_LED_MODULES 8
+#define LP5030_MAX_LED_MODULES 10
+#define LP5036_MAX_LED_MODULES 12
+
+static const struct reg_default lp5012_reg_defs[] = {
+ {LP50XX_DEV_CFG0, 0x0},
+ {LP50XX_DEV_CFG1, 0x3c},
+ {LP50XX_LED_CFG0, 0x0},
+ {LP5012_BNK_BRT, 0xff},
+ {LP5012_BNKA_CLR, 0x0f},
+ {LP5012_BNKB_CLR, 0x0f},
+ {LP5012_BNKC_CLR, 0x0f},
+ {LP5012_LED0_BRT, 0x0f},
+ /* LEDX_BRT registers are all 0xff for defaults */
+ {0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff},
+ {LP5012_OUT0_CLR, 0x0f},
+ /* OUTX_CLR registers are all 0x0 for defaults */
+ {0x0c, 0x00}, {0x0d, 0x00}, {0x0e, 0x00}, {0x0f, 0x00}, {0x10, 0x00},
+ {0x11, 0x00}, {0x12, 0x00}, {0x13, 0x00}, {0x14, 0x00}, {0x15, 0x00},
+ {0x16, 0x00},
+ {LP5012_RESET, 0x00}
+};
+
+static const struct reg_default lp5024_reg_defs[] = {
+ {LP50XX_DEV_CFG0, 0x0},
+ {LP50XX_DEV_CFG1, 0x3c},
+ {LP50XX_LED_CFG0, 0x0},
+ {LP5024_BNK_BRT, 0xff},
+ {LP5024_BNKA_CLR, 0x0f},
+ {LP5024_BNKB_CLR, 0x0f},
+ {LP5024_BNKC_CLR, 0x0f},
+ {LP5024_LED0_BRT, 0x0f},
+ /* LEDX_BRT registers are all 0xff for defaults */
+ {0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff}, {0x0b, 0xff}, {0x0c, 0xff},
+ {0x0d, 0xff}, {0x0e, 0xff},
+ {LP5024_OUT0_CLR, 0x0f},
+ /* OUTX_CLR registers are all 0x0 for defaults */
+ {0x10, 0x00}, {0x11, 0x00}, {0x12, 0x00}, {0x13, 0x00}, {0x14, 0x00},
+ {0x15, 0x00}, {0x16, 0x00}, {0x17, 0x00}, {0x18, 0x00}, {0x19, 0x00},
+ {0x1a, 0x00}, {0x1b, 0x00}, {0x1c, 0x00}, {0x1d, 0x00}, {0x1e, 0x00},
+ {0x1f, 0x00}, {0x20, 0x00}, {0x21, 0x00}, {0x22, 0x00}, {0x23, 0x00},
+ {0x24, 0x00}, {0x25, 0x00}, {0x26, 0x00},
+ {LP5024_RESET, 0x00}
+};
+
+static const struct reg_default lp5036_reg_defs[] = {
+ {LP50XX_DEV_CFG0, 0x0},
+ {LP50XX_DEV_CFG1, 0x3c},
+ {LP50XX_LED_CFG0, 0x0},
+ {LP5036_LED_CFG1, 0x0},
+ {LP5036_BNK_BRT, 0xff},
+ {LP5036_BNKA_CLR, 0x0f},
+ {LP5036_BNKB_CLR, 0x0f},
+ {LP5036_BNKC_CLR, 0x0f},
+ {LP5036_LED0_BRT, 0x0f},
+ /* LEDX_BRT registers are all 0xff for defaults */
+ {0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff}, {0x0b, 0xff}, {0x0c, 0xff},
+ {0x0d, 0xff}, {0x0e, 0xff}, {0x0f, 0xff}, {0x10, 0xff}, {0x11, 0xff},
+ {0x12, 0xff}, {0x13, 0xff},
+ {LP5036_OUT0_CLR, 0x0f},
+ /* OUTX_CLR registers are all 0x0 for defaults */
+ {0x15, 0x00}, {0x16, 0x00}, {0x17, 0x00}, {0x18, 0x00}, {0x19, 0x00},
+ {0x1a, 0x00}, {0x1b, 0x00}, {0x1c, 0x00}, {0x1d, 0x00}, {0x1e, 0x00},
+ {0x1f, 0x00}, {0x20, 0x00}, {0x21, 0x00}, {0x22, 0x00}, {0x23, 0x00},
+ {0x24, 0x00}, {0x25, 0x00}, {0x26, 0x00}, {0x27, 0x00}, {0x28, 0x00},
+ {0x29, 0x00}, {0x2a, 0x00}, {0x2b, 0x00}, {0x2c, 0x00}, {0x2d, 0x00},
+ {0x2e, 0x00}, {0x2f, 0x00}, {0x30, 0x00}, {0x31, 0x00}, {0x32, 0x00},
+ {0x33, 0x00}, {0x34, 0x00}, {0x35, 0x00}, {0x36, 0x00}, {0x37, 0x00},
+ {LP5036_RESET, 0x00}
+};
+
+static const struct regmap_config lp5012_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LP5012_RESET,
+ .reg_defaults = lp5012_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(lp5012_reg_defs),
+ .cache_type = REGCACHE_FLAT,
+};
+
+static const struct regmap_config lp5024_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LP5024_RESET,
+ .reg_defaults = lp5024_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(lp5024_reg_defs),
+ .cache_type = REGCACHE_FLAT,
+};
+
+static const struct regmap_config lp5036_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LP5036_RESET,
+ .reg_defaults = lp5036_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(lp5036_reg_defs),
+ .cache_type = REGCACHE_FLAT,
+};
+
+enum lp50xx_model {
+ LP5009,
+ LP5012,
+ LP5018,
+ LP5024,
+ LP5030,
+ LP5036,
+};
+
+/**
+ * struct lp50xx_chip_info -
+ * @lp50xx_regmap_config: regmap register configuration
+ * @model_id: LED device model
+ * @max_modules: total number of supported LED modules
+ * @num_leds: number of LED outputs available on the device
+ * @led_brightness0_reg: first brightness register of the device
+ * @mix_out0_reg: first color mix register of the device
+ * @bank_brt_reg: bank brightness register
+ * @bank_mix_reg: color mix register
+ * @reset_reg: device reset register
+ */
+struct lp50xx_chip_info {
+ const struct regmap_config *lp50xx_regmap_config;
+ int model_id;
+ u8 max_modules;
+ u8 num_leds;
+ u8 led_brightness0_reg;
+ u8 mix_out0_reg;
+ u8 bank_brt_reg;
+ u8 bank_mix_reg;
+ u8 reset_reg;
+};
+
+static const struct lp50xx_chip_info lp50xx_chip_info_tbl[] = {
+ [LP5009] = {
+ .model_id = LP5009,
+ .max_modules = LP5009_MAX_LED_MODULES,
+ .num_leds = LP5009_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
+ .led_brightness0_reg = LP5012_LED0_BRT,
+ .mix_out0_reg = LP5012_OUT0_CLR,
+ .bank_brt_reg = LP5012_BNK_BRT,
+ .bank_mix_reg = LP5012_BNKA_CLR,
+ .reset_reg = LP5012_RESET,
+ .lp50xx_regmap_config = &lp5012_regmap_config,
+ },
+ [LP5012] = {
+ .model_id = LP5012,
+ .max_modules = LP5012_MAX_LED_MODULES,
+ .num_leds = LP5012_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
+ .led_brightness0_reg = LP5012_LED0_BRT,
+ .mix_out0_reg = LP5012_OUT0_CLR,
+ .bank_brt_reg = LP5012_BNK_BRT,
+ .bank_mix_reg = LP5012_BNKA_CLR,
+ .reset_reg = LP5012_RESET,
+ .lp50xx_regmap_config = &lp5012_regmap_config,
+ },
+ [LP5018] = {
+ .model_id = LP5018,
+ .max_modules = LP5018_MAX_LED_MODULES,
+ .num_leds = LP5018_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
+ .led_brightness0_reg = LP5024_LED0_BRT,
+ .mix_out0_reg = LP5024_OUT0_CLR,
+ .bank_brt_reg = LP5024_BNK_BRT,
+ .bank_mix_reg = LP5024_BNKA_CLR,
+ .reset_reg = LP5024_RESET,
+ .lp50xx_regmap_config = &lp5024_regmap_config,
+ },
+ [LP5024] = {
+ .model_id = LP5024,
+ .max_modules = LP5024_MAX_LED_MODULES,
+ .num_leds = LP5024_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
+ .led_brightness0_reg = LP5024_LED0_BRT,
+ .mix_out0_reg = LP5024_OUT0_CLR,
+ .bank_brt_reg = LP5024_BNK_BRT,
+ .bank_mix_reg = LP5024_BNKA_CLR,
+ .reset_reg = LP5024_RESET,
+ .lp50xx_regmap_config = &lp5024_regmap_config,
+ },
+ [LP5030] = {
+ .model_id = LP5030,
+ .max_modules = LP5030_MAX_LED_MODULES,
+ .num_leds = LP5030_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
+ .led_brightness0_reg = LP5036_LED0_BRT,
+ .mix_out0_reg = LP5036_OUT0_CLR,
+ .bank_brt_reg = LP5036_BNK_BRT,
+ .bank_mix_reg = LP5036_BNKA_CLR,
+ .reset_reg = LP5036_RESET,
+ .lp50xx_regmap_config = &lp5036_regmap_config,
+ },
+ [LP5036] = {
+ .model_id = LP5036,
+ .max_modules = LP5036_MAX_LED_MODULES,
+ .num_leds = LP5036_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
+ .led_brightness0_reg = LP5036_LED0_BRT,
+ .mix_out0_reg = LP5036_OUT0_CLR,
+ .bank_brt_reg = LP5036_BNK_BRT,
+ .bank_mix_reg = LP5036_BNKA_CLR,
+ .reset_reg = LP5036_RESET,
+ .lp50xx_regmap_config = &lp5036_regmap_config,
+ },
+};
+
+struct lp50xx_led {
+ struct led_classdev_mc mc_cdev;
+ struct lp50xx *priv;
+ unsigned long bank_modules;
+ u8 ctrl_bank_enabled;
+ int led_number;
+};
+
+/**
+ * struct lp50xx -
+ * @enable_gpio: hardware enable gpio
+ * @regulator: LED supply regulator pointer
+ * @client: pointer to the I2C client
+ * @regmap: device register map
+ * @dev: pointer to the devices device struct
+ * @lock: lock for reading/writing the device
+ * @chip_info: chip specific information (ie num_leds)
+ * @num_of_banked_leds: holds the number of banked LEDs
+ * @leds: array of LED strings
+ */
+struct lp50xx {
+ struct gpio_desc *enable_gpio;
+ struct regulator *regulator;
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct device *dev;
+ struct mutex lock;
+ const struct lp50xx_chip_info *chip_info;
+ int num_of_banked_leds;
+
+ /* This needs to be at the end of the struct */
+ struct lp50xx_led leds[];
+};
+
+static struct lp50xx_led *mcled_cdev_to_led(struct led_classdev_mc *mc_cdev)
+{
+ return container_of(mc_cdev, struct lp50xx_led, mc_cdev);
+}
+
+static int lp50xx_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
+ struct lp50xx_led *led = mcled_cdev_to_led(mc_dev);
+ const struct lp50xx_chip_info *led_chip = led->priv->chip_info;
+ u8 led_offset, reg_val;
+ int ret = 0;
+ int i;
+
+ mutex_lock(&led->priv->lock);
+ if (led->ctrl_bank_enabled)
+ reg_val = led_chip->bank_brt_reg;
+ else
+ reg_val = led_chip->led_brightness0_reg +
+ led->led_number;
+
+ ret = regmap_write(led->priv->regmap, reg_val, brightness);
+ if (ret) {
+ dev_err(led->priv->dev,
+ "Cannot write brightness value %d\n", ret);
+ goto out;
+ }
+
+ for (i = 0; i < led->mc_cdev.num_colors; i++) {
+ if (led->ctrl_bank_enabled) {
+ reg_val = led_chip->bank_mix_reg + i;
+ } else {
+ led_offset = (led->led_number * 3) + i;
+ reg_val = led_chip->mix_out0_reg + led_offset;
+ }
+
+ ret = regmap_write(led->priv->regmap, reg_val,
+ mc_dev->subled_info[i].intensity);
+ if (ret) {
+ dev_err(led->priv->dev,
+ "Cannot write intensity value %d\n", ret);
+ goto out;
+ }
+ }
+out:
+ mutex_unlock(&led->priv->lock);
+ return ret;
+}
+
+static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[])
+{
+ u8 led_config_lo, led_config_hi;
+ u32 bank_enable_mask = 0;
+ int ret;
+ int i;
+
+ for (i = 0; i < priv->chip_info->max_modules; i++) {
+ if (led_banks[i])
+ bank_enable_mask |= (1 << led_banks[i]);
+ }
+
+ led_config_lo = bank_enable_mask;
+ led_config_hi = bank_enable_mask >> 8;
+
+ ret = regmap_write(priv->regmap, LP50XX_LED_CFG0, led_config_lo);
+ if (ret)
+ return ret;
+
+ if (priv->chip_info->model_id >= LP5030)
+ ret = regmap_write(priv->regmap, LP5036_LED_CFG1, led_config_hi);
+
+ return ret;
+}
+
+static int lp50xx_reset(struct lp50xx *priv)
+{
+ return regmap_write(priv->regmap, priv->chip_info->reset_reg, LP50XX_SW_RESET);
+}
+
+static int lp50xx_enable_disable(struct lp50xx *priv, int enable_disable)
+{
+ int ret;
+
+ ret = gpiod_direction_output(priv->enable_gpio, enable_disable);
+ if (ret)
+ return ret;
+
+ if (enable_disable)
+ return regmap_write(priv->regmap, LP50XX_DEV_CFG0, LP50XX_CHIP_EN);
+ else
+ return regmap_write(priv->regmap, LP50XX_DEV_CFG0, 0);
+
+}
+
+static int lp50xx_probe_leds(struct fwnode_handle *child, struct lp50xx *priv,
+ struct lp50xx_led *led, int num_leds)
+{
+ u32 led_banks[LP5036_MAX_LED_MODULES] = {0};
+ int led_number;
+ int ret;
+
+ if (num_leds > 1) {
+ if (num_leds > priv->chip_info->max_modules) {
+ dev_err(priv->dev, "reg property is invalid\n");
+ return -EINVAL;
+ }
+
+ priv->num_of_banked_leds = num_leds;
+
+ ret = fwnode_property_read_u32_array(child, "reg", led_banks, num_leds);
+ if (ret) {
+ dev_err(priv->dev, "reg property is missing\n");
+ return ret;
+ }
+
+ ret = lp50xx_set_banks(priv, led_banks);
+ if (ret) {
+ dev_err(priv->dev, "Cannot setup banked LEDs\n");
+ return ret;
+ }
+
+ led->ctrl_bank_enabled = 1;
+ } else {
+ ret = fwnode_property_read_u32(child, "reg", &led_number);
+ if (ret) {
+ dev_err(priv->dev, "led reg property missing\n");
+ return ret;
+ }
+
+ if (led_number > priv->chip_info->num_leds) {
+ dev_err(priv->dev, "led-sources property is invalid\n");
+ return -EINVAL;
+ }
+
+ led->led_number = led_number;
+ }
+
+ return 0;
+}
+
+static int lp50xx_probe_dt(struct lp50xx *priv)
+{
+ struct fwnode_handle *child = NULL;
+ struct fwnode_handle *led_node = NULL;
+ struct led_init_data init_data = {};
+ struct led_classdev *led_cdev;
+ struct mc_subled *mc_led_info;
+ struct lp50xx_led *led;
+ int ret = -EINVAL;
+ int num_colors;
+ u32 color_id;
+ int i = 0;
+
+ priv->enable_gpio = devm_gpiod_get_optional(priv->dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(priv->enable_gpio))
+ return dev_err_probe(priv->dev, PTR_ERR(priv->enable_gpio),
+ "Failed to get enable GPIO\n");
+
+ priv->regulator = devm_regulator_get(priv->dev, "vled");
+ if (IS_ERR(priv->regulator))
+ priv->regulator = NULL;
+
+ device_for_each_child_node(priv->dev, child) {
+ led = &priv->leds[i];
+ ret = fwnode_property_count_u32(child, "reg");
+ if (ret < 0) {
+ dev_err(priv->dev, "reg property is invalid\n");
+ goto child_out;
+ }
+
+ ret = lp50xx_probe_leds(child, priv, led, ret);
+ if (ret)
+ goto child_out;
+
+ init_data.fwnode = child;
+ num_colors = 0;
+
+ /*
+ * There are only 3 LEDs per module otherwise they should be
+ * banked which also is presented as 3 LEDs.
+ */
+ mc_led_info = devm_kcalloc(priv->dev, LP50XX_LEDS_PER_MODULE,
+ sizeof(*mc_led_info), GFP_KERNEL);
+ if (!mc_led_info) {
+ ret = -ENOMEM;
+ goto child_out;
+ }
+
+ fwnode_for_each_child_node(child, led_node) {
+ ret = fwnode_property_read_u32(led_node, "color",
+ &color_id);
+ if (ret) {
+ fwnode_handle_put(led_node);
+ dev_err(priv->dev, "Cannot read color\n");
+ goto child_out;
+ }
+
+ mc_led_info[num_colors].color_index = color_id;
+ num_colors++;
+ }
+
+ led->priv = priv;
+ led->mc_cdev.num_colors = num_colors;
+ led->mc_cdev.subled_info = mc_led_info;
+ led_cdev = &led->mc_cdev.led_cdev;
+ led_cdev->brightness_set_blocking = lp50xx_brightness_set;
+
+ ret = devm_led_classdev_multicolor_register_ext(priv->dev,
+ &led->mc_cdev,
+ &init_data);
+ if (ret) {
+ dev_err(priv->dev, "led register err: %d\n", ret);
+ goto child_out;
+ }
+ i++;
+ }
+
+ return 0;
+
+child_out:
+ fwnode_handle_put(child);
+ return ret;
+}
+
+static int lp50xx_probe(struct i2c_client *client)
+{
+ struct lp50xx *led;
+ int count;
+ int ret;
+
+ count = device_get_child_node_count(&client->dev);
+ if (!count) {
+ dev_err(&client->dev, "LEDs are not defined in device tree!");
+ return -ENODEV;
+ }
+
+ led = devm_kzalloc(&client->dev, struct_size(led, leds, count),
+ GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ mutex_init(&led->lock);
+ led->client = client;
+ led->dev = &client->dev;
+ led->chip_info = device_get_match_data(&client->dev);
+ i2c_set_clientdata(client, led);
+ led->regmap = devm_regmap_init_i2c(client,
+ led->chip_info->lp50xx_regmap_config);
+ if (IS_ERR(led->regmap)) {
+ ret = PTR_ERR(led->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = lp50xx_reset(led);
+ if (ret)
+ return ret;
+
+ ret = lp50xx_enable_disable(led, 1);
+ if (ret)
+ return ret;
+
+ return lp50xx_probe_dt(led);
+}
+
+static void lp50xx_remove(struct i2c_client *client)
+{
+ struct lp50xx *led = i2c_get_clientdata(client);
+ int ret;
+
+ ret = lp50xx_enable_disable(led, 0);
+ if (ret)
+ dev_err(led->dev, "Failed to disable chip\n");
+
+ if (led->regulator) {
+ ret = regulator_disable(led->regulator);
+ if (ret)
+ dev_err(led->dev, "Failed to disable regulator\n");
+ }
+
+ mutex_destroy(&led->lock);
+}
+
+static const struct i2c_device_id lp50xx_id[] = {
+ { "lp5009", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5009] },
+ { "lp5012", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5012] },
+ { "lp5018", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5018] },
+ { "lp5024", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5024] },
+ { "lp5030", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5030] },
+ { "lp5036", (kernel_ulong_t)&lp50xx_chip_info_tbl[LP5036] },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lp50xx_id);
+
+static const struct of_device_id of_lp50xx_leds_match[] = {
+ { .compatible = "ti,lp5009", .data = &lp50xx_chip_info_tbl[LP5009] },
+ { .compatible = "ti,lp5012", .data = &lp50xx_chip_info_tbl[LP5012] },
+ { .compatible = "ti,lp5018", .data = &lp50xx_chip_info_tbl[LP5018] },
+ { .compatible = "ti,lp5024", .data = &lp50xx_chip_info_tbl[LP5024] },
+ { .compatible = "ti,lp5030", .data = &lp50xx_chip_info_tbl[LP5030] },
+ { .compatible = "ti,lp5036", .data = &lp50xx_chip_info_tbl[LP5036] },
+ {}
+};
+MODULE_DEVICE_TABLE(of, of_lp50xx_leds_match);
+
+static struct i2c_driver lp50xx_driver = {
+ .driver = {
+ .name = "lp50xx",
+ .of_match_table = of_lp50xx_leds_match,
+ },
+ .probe_new = lp50xx_probe,
+ .remove = lp50xx_remove,
+ .id_table = lp50xx_id,
+};
+module_i2c_driver(lp50xx_driver);
+
+MODULE_DESCRIPTION("Texas Instruments LP50XX LED driver");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
new file mode 100644
index 000000000..7ff20c260
--- /dev/null
+++ b/drivers/leds/leds-lp5521.c
@@ -0,0 +1,621 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LP5521 LED chip driver.
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ * Copyright (C) 2012 Texas Instruments
+ *
+ * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
+ * Milo(Woogyom) Kim <milo.kim@ti.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_data/leds-lp55xx.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+
+#include "leds-lp55xx-common.h"
+
+#define LP5521_PROGRAM_LENGTH 32
+#define LP5521_MAX_LEDS 3
+#define LP5521_CMD_DIRECT 0x3F
+
+/* Registers */
+#define LP5521_REG_ENABLE 0x00
+#define LP5521_REG_OP_MODE 0x01
+#define LP5521_REG_R_PWM 0x02
+#define LP5521_REG_G_PWM 0x03
+#define LP5521_REG_B_PWM 0x04
+#define LP5521_REG_R_CURRENT 0x05
+#define LP5521_REG_G_CURRENT 0x06
+#define LP5521_REG_B_CURRENT 0x07
+#define LP5521_REG_CONFIG 0x08
+#define LP5521_REG_STATUS 0x0C
+#define LP5521_REG_RESET 0x0D
+#define LP5521_REG_R_PROG_MEM 0x10
+#define LP5521_REG_G_PROG_MEM 0x30
+#define LP5521_REG_B_PROG_MEM 0x50
+
+/* Base register to set LED current */
+#define LP5521_REG_LED_CURRENT_BASE LP5521_REG_R_CURRENT
+/* Base register to set the brightness */
+#define LP5521_REG_LED_PWM_BASE LP5521_REG_R_PWM
+
+/* Bits in ENABLE register */
+#define LP5521_MASTER_ENABLE 0x40 /* Chip master enable */
+#define LP5521_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */
+#define LP5521_EXEC_RUN 0x2A
+#define LP5521_ENABLE_DEFAULT \
+ (LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM)
+#define LP5521_ENABLE_RUN_PROGRAM \
+ (LP5521_ENABLE_DEFAULT | LP5521_EXEC_RUN)
+
+/* CONFIG register */
+#define LP5521_PWM_HF 0x40 /* PWM: 0 = 256Hz, 1 = 558Hz */
+#define LP5521_PWRSAVE_EN 0x20 /* 1 = Power save mode */
+#define LP5521_CP_MODE_OFF 0 /* Charge pump (CP) off */
+#define LP5521_CP_MODE_BYPASS 8 /* CP forced to bypass mode */
+#define LP5521_CP_MODE_1X5 0x10 /* CP forced to 1.5x mode */
+#define LP5521_CP_MODE_AUTO 0x18 /* Automatic mode selection */
+#define LP5521_R_TO_BATT 0x04 /* R out: 0 = CP, 1 = Vbat */
+#define LP5521_CLK_INT 0x01 /* Internal clock */
+#define LP5521_DEFAULT_CFG \
+ (LP5521_PWM_HF | LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO)
+
+/* Status */
+#define LP5521_EXT_CLK_USED 0x08
+
+/* default R channel current register value */
+#define LP5521_REG_R_CURR_DEFAULT 0xAF
+
+/* Reset register value */
+#define LP5521_RESET 0xFF
+
+/* Program Memory Operations */
+#define LP5521_MODE_R_M 0x30 /* Operation Mode Register */
+#define LP5521_MODE_G_M 0x0C
+#define LP5521_MODE_B_M 0x03
+#define LP5521_LOAD_R 0x10
+#define LP5521_LOAD_G 0x04
+#define LP5521_LOAD_B 0x01
+
+#define LP5521_R_IS_LOADING(mode) \
+ ((mode & LP5521_MODE_R_M) == LP5521_LOAD_R)
+#define LP5521_G_IS_LOADING(mode) \
+ ((mode & LP5521_MODE_G_M) == LP5521_LOAD_G)
+#define LP5521_B_IS_LOADING(mode) \
+ ((mode & LP5521_MODE_B_M) == LP5521_LOAD_B)
+
+#define LP5521_EXEC_R_M 0x30 /* Enable Register */
+#define LP5521_EXEC_G_M 0x0C
+#define LP5521_EXEC_B_M 0x03
+#define LP5521_EXEC_M 0x3F
+#define LP5521_RUN_R 0x20
+#define LP5521_RUN_G 0x08
+#define LP5521_RUN_B 0x02
+
+static inline void lp5521_wait_opmode_done(void)
+{
+ /* operation mode change needs to be longer than 153 us */
+ usleep_range(200, 300);
+}
+
+static inline void lp5521_wait_enable_done(void)
+{
+ /* it takes more 488 us to update ENABLE register */
+ usleep_range(500, 600);
+}
+
+static void lp5521_set_led_current(struct lp55xx_led *led, u8 led_current)
+{
+ led->led_current = led_current;
+ lp55xx_write(led->chip, LP5521_REG_LED_CURRENT_BASE + led->chan_nr,
+ led_current);
+}
+
+static void lp5521_load_engine(struct lp55xx_chip *chip)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ static const u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP5521_MODE_R_M,
+ [LP55XX_ENGINE_2] = LP5521_MODE_G_M,
+ [LP55XX_ENGINE_3] = LP5521_MODE_B_M,
+ };
+
+ static const u8 val[] = {
+ [LP55XX_ENGINE_1] = LP5521_LOAD_R,
+ [LP55XX_ENGINE_2] = LP5521_LOAD_G,
+ [LP55XX_ENGINE_3] = LP5521_LOAD_B,
+ };
+
+ lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], val[idx]);
+
+ lp5521_wait_opmode_done();
+}
+
+static void lp5521_stop_all_engines(struct lp55xx_chip *chip)
+{
+ lp55xx_write(chip, LP5521_REG_OP_MODE, 0);
+ lp5521_wait_opmode_done();
+}
+
+static void lp5521_stop_engine(struct lp55xx_chip *chip)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ static const u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP5521_MODE_R_M,
+ [LP55XX_ENGINE_2] = LP5521_MODE_G_M,
+ [LP55XX_ENGINE_3] = LP5521_MODE_B_M,
+ };
+
+ lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], 0);
+
+ lp5521_wait_opmode_done();
+}
+
+static void lp5521_run_engine(struct lp55xx_chip *chip, bool start)
+{
+ int ret;
+ u8 mode;
+ u8 exec;
+
+ /* stop engine */
+ if (!start) {
+ lp5521_stop_engine(chip);
+ lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
+ lp5521_wait_opmode_done();
+ return;
+ }
+
+ /*
+ * To run the engine,
+ * operation mode and enable register should updated at the same time
+ */
+
+ ret = lp55xx_read(chip, LP5521_REG_OP_MODE, &mode);
+ if (ret)
+ return;
+
+ ret = lp55xx_read(chip, LP5521_REG_ENABLE, &exec);
+ if (ret)
+ return;
+
+ /* change operation mode to RUN only when each engine is loading */
+ if (LP5521_R_IS_LOADING(mode)) {
+ mode = (mode & ~LP5521_MODE_R_M) | LP5521_RUN_R;
+ exec = (exec & ~LP5521_EXEC_R_M) | LP5521_RUN_R;
+ }
+
+ if (LP5521_G_IS_LOADING(mode)) {
+ mode = (mode & ~LP5521_MODE_G_M) | LP5521_RUN_G;
+ exec = (exec & ~LP5521_EXEC_G_M) | LP5521_RUN_G;
+ }
+
+ if (LP5521_B_IS_LOADING(mode)) {
+ mode = (mode & ~LP5521_MODE_B_M) | LP5521_RUN_B;
+ exec = (exec & ~LP5521_EXEC_B_M) | LP5521_RUN_B;
+ }
+
+ lp55xx_write(chip, LP5521_REG_OP_MODE, mode);
+ lp5521_wait_opmode_done();
+
+ lp55xx_update_bits(chip, LP5521_REG_ENABLE, LP5521_EXEC_M, exec);
+ lp5521_wait_enable_done();
+}
+
+static int lp5521_update_program_memory(struct lp55xx_chip *chip,
+ const u8 *data, size_t size)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ u8 pattern[LP5521_PROGRAM_LENGTH] = {0};
+ static const u8 addr[] = {
+ [LP55XX_ENGINE_1] = LP5521_REG_R_PROG_MEM,
+ [LP55XX_ENGINE_2] = LP5521_REG_G_PROG_MEM,
+ [LP55XX_ENGINE_3] = LP5521_REG_B_PROG_MEM,
+ };
+ unsigned cmd;
+ char c[3];
+ int nrchars;
+ int ret;
+ int offset = 0;
+ int i = 0;
+
+ while ((offset < size - 1) && (i < LP5521_PROGRAM_LENGTH)) {
+ /* separate sscanfs because length is working only for %s */
+ ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
+ if (ret != 1)
+ goto err;
+
+ ret = sscanf(c, "%2x", &cmd);
+ if (ret != 1)
+ goto err;
+
+ pattern[i] = (u8)cmd;
+ offset += nrchars;
+ i++;
+ }
+
+ /* Each instruction is 16bit long. Check that length is even */
+ if (i % 2)
+ goto err;
+
+ for (i = 0; i < LP5521_PROGRAM_LENGTH; i++) {
+ ret = lp55xx_write(chip, addr[idx] + i, pattern[i]);
+ if (ret)
+ return -EINVAL;
+ }
+
+ return size;
+
+err:
+ dev_err(&chip->cl->dev, "wrong pattern format\n");
+ return -EINVAL;
+}
+
+static void lp5521_firmware_loaded(struct lp55xx_chip *chip)
+{
+ const struct firmware *fw = chip->fw;
+
+ if (fw->size > LP5521_PROGRAM_LENGTH) {
+ dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
+ fw->size);
+ return;
+ }
+
+ /*
+ * Program memory sequence
+ * 1) set engine mode to "LOAD"
+ * 2) write firmware data into program memory
+ */
+
+ lp5521_load_engine(chip);
+ lp5521_update_program_memory(chip, fw->data, fw->size);
+}
+
+static int lp5521_post_init_device(struct lp55xx_chip *chip)
+{
+ int ret;
+ u8 val;
+
+ /*
+ * Make sure that the chip is reset by reading back the r channel
+ * current reg. This is dummy read is required on some platforms -
+ * otherwise further access to the R G B channels in the
+ * LP5521_REG_ENABLE register will not have any effect - strange!
+ */
+ ret = lp55xx_read(chip, LP5521_REG_R_CURRENT, &val);
+ if (ret) {
+ dev_err(&chip->cl->dev, "error in resetting chip\n");
+ return ret;
+ }
+ if (val != LP5521_REG_R_CURR_DEFAULT) {
+ dev_err(&chip->cl->dev,
+ "unexpected data in register (expected 0x%x got 0x%x)\n",
+ LP5521_REG_R_CURR_DEFAULT, val);
+ ret = -EINVAL;
+ return ret;
+ }
+ usleep_range(10000, 20000);
+
+ /* Set all PWMs to direct control mode */
+ ret = lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
+
+ /* Update configuration for the clock setting */
+ val = LP5521_DEFAULT_CFG;
+ if (!lp55xx_is_extclk_used(chip))
+ val |= LP5521_CLK_INT;
+
+ ret = lp55xx_write(chip, LP5521_REG_CONFIG, val);
+ if (ret)
+ return ret;
+
+ /* Initialize all channels PWM to zero -> leds off */
+ lp55xx_write(chip, LP5521_REG_R_PWM, 0);
+ lp55xx_write(chip, LP5521_REG_G_PWM, 0);
+ lp55xx_write(chip, LP5521_REG_B_PWM, 0);
+
+ /* Set engines are set to run state when OP_MODE enables engines */
+ ret = lp55xx_write(chip, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM);
+ if (ret)
+ return ret;
+
+ lp5521_wait_enable_done();
+
+ return 0;
+}
+
+static int lp5521_run_selftest(struct lp55xx_chip *chip, char *buf)
+{
+ struct lp55xx_platform_data *pdata = chip->pdata;
+ int ret;
+ u8 status;
+
+ ret = lp55xx_read(chip, LP5521_REG_STATUS, &status);
+ if (ret < 0)
+ return ret;
+
+ if (pdata->clock_mode != LP55XX_CLOCK_EXT)
+ return 0;
+
+ /* Check that ext clock is really in use if requested */
+ if ((status & LP5521_EXT_CLK_USED) == 0)
+ return -EIO;
+
+ return 0;
+}
+
+static int lp5521_multicolor_brightness(struct lp55xx_led *led)
+{
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+ int i;
+
+ mutex_lock(&chip->lock);
+ for (i = 0; i < led->mc_cdev.num_colors; i++) {
+ ret = lp55xx_write(chip,
+ LP5521_REG_LED_PWM_BASE +
+ led->mc_cdev.subled_info[i].channel,
+ led->mc_cdev.subled_info[i].brightness);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static int lp5521_led_brightness(struct lp55xx_led *led)
+{
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+
+ mutex_lock(&chip->lock);
+ ret = lp55xx_write(chip, LP5521_REG_LED_PWM_BASE + led->chan_nr,
+ led->brightness);
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static ssize_t show_engine_mode(struct device *dev,
+ struct device_attribute *attr,
+ char *buf, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode;
+
+ switch (mode) {
+ case LP55XX_ENGINE_RUN:
+ return sprintf(buf, "run\n");
+ case LP55XX_ENGINE_LOAD:
+ return sprintf(buf, "load\n");
+ case LP55XX_ENGINE_DISABLED:
+ default:
+ return sprintf(buf, "disabled\n");
+ }
+}
+show_mode(1)
+show_mode(2)
+show_mode(3)
+
+static ssize_t store_engine_mode(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_engine *engine = &chip->engines[nr - 1];
+
+ mutex_lock(&chip->lock);
+
+ chip->engine_idx = nr;
+
+ if (!strncmp(buf, "run", 3)) {
+ lp5521_run_engine(chip, true);
+ engine->mode = LP55XX_ENGINE_RUN;
+ } else if (!strncmp(buf, "load", 4)) {
+ lp5521_stop_engine(chip);
+ lp5521_load_engine(chip);
+ engine->mode = LP55XX_ENGINE_LOAD;
+ } else if (!strncmp(buf, "disabled", 8)) {
+ lp5521_stop_engine(chip);
+ engine->mode = LP55XX_ENGINE_DISABLED;
+ }
+
+ mutex_unlock(&chip->lock);
+
+ return len;
+}
+store_mode(1)
+store_mode(2)
+store_mode(3)
+
+static ssize_t store_engine_load(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+
+ mutex_lock(&chip->lock);
+
+ chip->engine_idx = nr;
+ lp5521_load_engine(chip);
+ ret = lp5521_update_program_memory(chip, buf, len);
+
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+store_load(1)
+store_load(2)
+store_load(3)
+
+static ssize_t lp5521_selftest(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+
+ mutex_lock(&chip->lock);
+ ret = lp5521_run_selftest(chip, buf);
+ mutex_unlock(&chip->lock);
+
+ return scnprintf(buf, PAGE_SIZE, "%s\n", ret ? "FAIL" : "OK");
+}
+
+/* device attributes */
+static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode);
+static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode);
+static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode);
+static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load);
+static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load);
+static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load);
+static LP55XX_DEV_ATTR_RO(selftest, lp5521_selftest);
+
+static struct attribute *lp5521_attributes[] = {
+ &dev_attr_engine1_mode.attr,
+ &dev_attr_engine2_mode.attr,
+ &dev_attr_engine3_mode.attr,
+ &dev_attr_engine1_load.attr,
+ &dev_attr_engine2_load.attr,
+ &dev_attr_engine3_load.attr,
+ &dev_attr_selftest.attr,
+ NULL
+};
+
+static const struct attribute_group lp5521_group = {
+ .attrs = lp5521_attributes,
+};
+
+/* Chip specific configurations */
+static struct lp55xx_device_config lp5521_cfg = {
+ .reset = {
+ .addr = LP5521_REG_RESET,
+ .val = LP5521_RESET,
+ },
+ .enable = {
+ .addr = LP5521_REG_ENABLE,
+ .val = LP5521_ENABLE_DEFAULT,
+ },
+ .max_channel = LP5521_MAX_LEDS,
+ .post_init_device = lp5521_post_init_device,
+ .brightness_fn = lp5521_led_brightness,
+ .multicolor_brightness_fn = lp5521_multicolor_brightness,
+ .set_led_current = lp5521_set_led_current,
+ .firmware_cb = lp5521_firmware_loaded,
+ .run_engine = lp5521_run_engine,
+ .dev_attr_group = &lp5521_group,
+};
+
+static int lp5521_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct lp55xx_chip *chip;
+ struct lp55xx_led *led;
+ struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
+ struct device_node *np = dev_of_node(&client->dev);
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->cfg = &lp5521_cfg;
+
+ if (!pdata) {
+ if (np) {
+ pdata = lp55xx_of_populate_pdata(&client->dev, np,
+ chip);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ } else {
+ dev_err(&client->dev, "no platform data\n");
+ return -EINVAL;
+ }
+ }
+
+ led = devm_kcalloc(&client->dev,
+ pdata->num_channels, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ chip->cl = client;
+ chip->pdata = pdata;
+
+ mutex_init(&chip->lock);
+
+ i2c_set_clientdata(client, led);
+
+ ret = lp55xx_init_device(chip);
+ if (ret)
+ goto err_init;
+
+ dev_info(&client->dev, "%s programmable led chip found\n", id->name);
+
+ ret = lp55xx_register_leds(led, chip);
+ if (ret)
+ goto err_out;
+
+ ret = lp55xx_register_sysfs(chip);
+ if (ret) {
+ dev_err(&client->dev, "registering sysfs failed\n");
+ goto err_out;
+ }
+
+ return 0;
+
+err_out:
+ lp55xx_deinit_device(chip);
+err_init:
+ return ret;
+}
+
+static void lp5521_remove(struct i2c_client *client)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(client);
+ struct lp55xx_chip *chip = led->chip;
+
+ lp5521_stop_all_engines(chip);
+ lp55xx_unregister_sysfs(chip);
+ lp55xx_deinit_device(chip);
+}
+
+static const struct i2c_device_id lp5521_id[] = {
+ { "lp5521", 0 }, /* Three channel chip */
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lp5521_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id of_lp5521_leds_match[] = {
+ { .compatible = "national,lp5521", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, of_lp5521_leds_match);
+#endif
+static struct i2c_driver lp5521_driver = {
+ .driver = {
+ .name = "lp5521",
+ .of_match_table = of_match_ptr(of_lp5521_leds_match),
+ },
+ .probe = lp5521_probe,
+ .remove = lp5521_remove,
+ .id_table = lp5521_id,
+};
+
+module_i2c_driver(lp5521_driver);
+
+MODULE_AUTHOR("Mathias Nyman, Yuri Zaporozhets, Samu Onkalo");
+MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
+MODULE_DESCRIPTION("LP5521 LED engine");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
new file mode 100644
index 000000000..369d40b0b
--- /dev/null
+++ b/drivers/leds/leds-lp5523.c
@@ -0,0 +1,993 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * lp5523.c - LP5523, LP55231 LED Driver
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ * Copyright (C) 2012 Texas Instruments
+ *
+ * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
+ * Milo(Woogyom) Kim <milo.kim@ti.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/platform_data/leds-lp55xx.h>
+#include <linux/slab.h>
+
+#include "leds-lp55xx-common.h"
+
+#define LP5523_PROGRAM_LENGTH 32 /* bytes */
+/* Memory is used like this:
+ * 0x00 engine 1 program
+ * 0x10 engine 2 program
+ * 0x20 engine 3 program
+ * 0x30 engine 1 muxing info
+ * 0x40 engine 2 muxing info
+ * 0x50 engine 3 muxing info
+ */
+#define LP5523_MAX_LEDS 9
+
+/* Registers */
+#define LP5523_REG_ENABLE 0x00
+#define LP5523_REG_OP_MODE 0x01
+#define LP5523_REG_ENABLE_LEDS_MSB 0x04
+#define LP5523_REG_ENABLE_LEDS_LSB 0x05
+#define LP5523_REG_LED_CTRL_BASE 0x06
+#define LP5523_REG_LED_PWM_BASE 0x16
+#define LP5523_REG_LED_CURRENT_BASE 0x26
+#define LP5523_REG_CONFIG 0x36
+#define LP5523_REG_STATUS 0x3A
+#define LP5523_REG_RESET 0x3D
+#define LP5523_REG_LED_TEST_CTRL 0x41
+#define LP5523_REG_LED_TEST_ADC 0x42
+#define LP5523_REG_MASTER_FADER_BASE 0x48
+#define LP5523_REG_CH1_PROG_START 0x4C
+#define LP5523_REG_CH2_PROG_START 0x4D
+#define LP5523_REG_CH3_PROG_START 0x4E
+#define LP5523_REG_PROG_PAGE_SEL 0x4F
+#define LP5523_REG_PROG_MEM 0x50
+
+/* Bit description in registers */
+#define LP5523_ENABLE 0x40
+#define LP5523_AUTO_INC 0x40
+#define LP5523_PWR_SAVE 0x20
+#define LP5523_PWM_PWR_SAVE 0x04
+#define LP5523_CP_AUTO 0x18
+#define LP5523_AUTO_CLK 0x02
+
+#define LP5523_EN_LEDTEST 0x80
+#define LP5523_LEDTEST_DONE 0x80
+#define LP5523_RESET 0xFF
+#define LP5523_ADC_SHORTCIRC_LIM 80
+#define LP5523_EXT_CLK_USED 0x08
+#define LP5523_ENG_STATUS_MASK 0x07
+
+#define LP5523_FADER_MAPPING_MASK 0xC0
+#define LP5523_FADER_MAPPING_SHIFT 6
+
+/* Memory Page Selection */
+#define LP5523_PAGE_ENG1 0
+#define LP5523_PAGE_ENG2 1
+#define LP5523_PAGE_ENG3 2
+#define LP5523_PAGE_MUX1 3
+#define LP5523_PAGE_MUX2 4
+#define LP5523_PAGE_MUX3 5
+
+/* Program Memory Operations */
+#define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */
+#define LP5523_MODE_ENG2_M 0x0C
+#define LP5523_MODE_ENG3_M 0x03
+#define LP5523_LOAD_ENG1 0x10
+#define LP5523_LOAD_ENG2 0x04
+#define LP5523_LOAD_ENG3 0x01
+
+#define LP5523_ENG1_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1)
+#define LP5523_ENG2_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2)
+#define LP5523_ENG3_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3)
+
+#define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */
+#define LP5523_EXEC_ENG2_M 0x0C
+#define LP5523_EXEC_ENG3_M 0x03
+#define LP5523_EXEC_M 0x3F
+#define LP5523_RUN_ENG1 0x20
+#define LP5523_RUN_ENG2 0x08
+#define LP5523_RUN_ENG3 0x02
+
+#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led)))
+
+enum lp5523_chip_id {
+ LP5523,
+ LP55231,
+};
+
+static int lp5523_init_program_engine(struct lp55xx_chip *chip);
+
+static inline void lp5523_wait_opmode_done(void)
+{
+ usleep_range(1000, 2000);
+}
+
+static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
+{
+ led->led_current = led_current;
+ lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
+ led_current);
+}
+
+static int lp5523_post_init_device(struct lp55xx_chip *chip)
+{
+ int ret;
+
+ ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE);
+ if (ret)
+ return ret;
+
+ /* Chip startup time is 500 us, 1 - 2 ms gives some margin */
+ usleep_range(1000, 2000);
+
+ ret = lp55xx_write(chip, LP5523_REG_CONFIG,
+ LP5523_AUTO_INC | LP5523_PWR_SAVE |
+ LP5523_CP_AUTO | LP5523_AUTO_CLK |
+ LP5523_PWM_PWR_SAVE);
+ if (ret)
+ return ret;
+
+ /* turn on all leds */
+ ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
+ if (ret)
+ return ret;
+
+ ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
+ if (ret)
+ return ret;
+
+ return lp5523_init_program_engine(chip);
+}
+
+static void lp5523_load_engine(struct lp55xx_chip *chip)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ static const u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
+ [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
+ [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
+ };
+
+ static const u8 val[] = {
+ [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1,
+ [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2,
+ [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
+ };
+
+ lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
+
+ lp5523_wait_opmode_done();
+}
+
+static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ static const u8 page_sel[] = {
+ [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1,
+ [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2,
+ [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
+ };
+
+ lp5523_load_engine(chip);
+
+ lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
+}
+
+static void lp5523_stop_all_engines(struct lp55xx_chip *chip)
+{
+ lp55xx_write(chip, LP5523_REG_OP_MODE, 0);
+ lp5523_wait_opmode_done();
+}
+
+static void lp5523_stop_engine(struct lp55xx_chip *chip)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ static const u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
+ [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
+ [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
+ };
+
+ lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0);
+
+ lp5523_wait_opmode_done();
+}
+
+static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
+{
+ int i;
+
+ for (i = 0; i < LP5523_MAX_LEDS; i++)
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0);
+}
+
+static void lp5523_run_engine(struct lp55xx_chip *chip, bool start)
+{
+ int ret;
+ u8 mode;
+ u8 exec;
+
+ /* stop engine */
+ if (!start) {
+ lp5523_stop_engine(chip);
+ lp5523_turn_off_channels(chip);
+ return;
+ }
+
+ /*
+ * To run the engine,
+ * operation mode and enable register should updated at the same time
+ */
+
+ ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode);
+ if (ret)
+ return;
+
+ ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec);
+ if (ret)
+ return;
+
+ /* change operation mode to RUN only when each engine is loading */
+ if (LP5523_ENG1_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1;
+ exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1;
+ }
+
+ if (LP5523_ENG2_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2;
+ exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2;
+ }
+
+ if (LP5523_ENG3_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3;
+ exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3;
+ }
+
+ lp55xx_write(chip, LP5523_REG_OP_MODE, mode);
+ lp5523_wait_opmode_done();
+
+ lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec);
+}
+
+static int lp5523_init_program_engine(struct lp55xx_chip *chip)
+{
+ int i;
+ int j;
+ int ret;
+ u8 status;
+ /* one pattern per engine setting LED MUX start and stop addresses */
+ static const u8 pattern[][LP5523_PROGRAM_LENGTH] = {
+ { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0},
+ { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0},
+ { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0},
+ };
+
+ /* hardcode 32 bytes of memory for each engine from program memory */
+ ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00);
+ if (ret)
+ return ret;
+
+ ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10);
+ if (ret)
+ return ret;
+
+ ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20);
+ if (ret)
+ return ret;
+
+ /* write LED MUX address space for each engine */
+ for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
+ chip->engine_idx = i;
+ lp5523_load_engine_and_select_page(chip);
+
+ for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) {
+ ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j,
+ pattern[i - 1][j]);
+ if (ret)
+ goto out;
+ }
+ }
+
+ lp5523_run_engine(chip, true);
+
+ /* Let the programs run for couple of ms and check the engine status */
+ usleep_range(3000, 6000);
+ ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
+ if (ret)
+ goto out;
+ status &= LP5523_ENG_STATUS_MASK;
+
+ if (status != LP5523_ENG_STATUS_MASK) {
+ dev_err(&chip->cl->dev,
+ "could not configure LED engine, status = 0x%.2x\n",
+ status);
+ ret = -1;
+ }
+
+out:
+ lp5523_stop_all_engines(chip);
+ return ret;
+}
+
+static int lp5523_update_program_memory(struct lp55xx_chip *chip,
+ const u8 *data, size_t size)
+{
+ u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
+ unsigned int cmd;
+ char c[3];
+ int nrchars;
+ int ret;
+ int offset = 0;
+ int i = 0;
+
+ while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) {
+ /* separate sscanfs because length is working only for %s */
+ ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
+ if (ret != 1)
+ goto err;
+
+ ret = sscanf(c, "%2x", &cmd);
+ if (ret != 1)
+ goto err;
+
+ pattern[i] = (u8)cmd;
+ offset += nrchars;
+ i++;
+ }
+
+ /* Each instruction is 16bit long. Check that length is even */
+ if (i % 2)
+ goto err;
+
+ for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) {
+ ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]);
+ if (ret)
+ return -EINVAL;
+ }
+
+ return size;
+
+err:
+ dev_err(&chip->cl->dev, "wrong pattern format\n");
+ return -EINVAL;
+}
+
+static void lp5523_firmware_loaded(struct lp55xx_chip *chip)
+{
+ const struct firmware *fw = chip->fw;
+
+ if (fw->size > LP5523_PROGRAM_LENGTH) {
+ dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
+ fw->size);
+ return;
+ }
+
+ /*
+ * Program memory sequence
+ * 1) set engine mode to "LOAD"
+ * 2) write firmware data into program memory
+ */
+
+ lp5523_load_engine_and_select_page(chip);
+ lp5523_update_program_memory(chip, fw->data, fw->size);
+}
+
+static ssize_t show_engine_mode(struct device *dev,
+ struct device_attribute *attr,
+ char *buf, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode;
+
+ switch (mode) {
+ case LP55XX_ENGINE_RUN:
+ return sprintf(buf, "run\n");
+ case LP55XX_ENGINE_LOAD:
+ return sprintf(buf, "load\n");
+ case LP55XX_ENGINE_DISABLED:
+ default:
+ return sprintf(buf, "disabled\n");
+ }
+}
+show_mode(1)
+show_mode(2)
+show_mode(3)
+
+static ssize_t store_engine_mode(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_engine *engine = &chip->engines[nr - 1];
+
+ mutex_lock(&chip->lock);
+
+ chip->engine_idx = nr;
+
+ if (!strncmp(buf, "run", 3)) {
+ lp5523_run_engine(chip, true);
+ engine->mode = LP55XX_ENGINE_RUN;
+ } else if (!strncmp(buf, "load", 4)) {
+ lp5523_stop_engine(chip);
+ lp5523_load_engine(chip);
+ engine->mode = LP55XX_ENGINE_LOAD;
+ } else if (!strncmp(buf, "disabled", 8)) {
+ lp5523_stop_engine(chip);
+ engine->mode = LP55XX_ENGINE_DISABLED;
+ }
+
+ mutex_unlock(&chip->lock);
+
+ return len;
+}
+store_mode(1)
+store_mode(2)
+store_mode(3)
+
+static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
+{
+ u16 tmp_mux = 0;
+ int i;
+
+ len = min_t(int, len, LP5523_MAX_LEDS);
+
+ for (i = 0; i < len; i++) {
+ switch (buf[i]) {
+ case '1':
+ tmp_mux |= (1 << i);
+ break;
+ case '0':
+ break;
+ case '\n':
+ i = len;
+ break;
+ default:
+ return -1;
+ }
+ }
+ *mux = tmp_mux;
+
+ return 0;
+}
+
+static void lp5523_mux_to_array(u16 led_mux, char *array)
+{
+ int i, pos = 0;
+
+ for (i = 0; i < LP5523_MAX_LEDS; i++)
+ pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
+
+ array[pos] = '\0';
+}
+
+static ssize_t show_engine_leds(struct device *dev,
+ struct device_attribute *attr,
+ char *buf, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ char mux[LP5523_MAX_LEDS + 1];
+
+ lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
+
+ return sprintf(buf, "%s\n", mux);
+}
+show_leds(1)
+show_leds(2)
+show_leds(3)
+
+static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr)
+{
+ struct lp55xx_engine *engine = &chip->engines[nr - 1];
+ int ret;
+ static const u8 mux_page[] = {
+ [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1,
+ [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2,
+ [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3,
+ };
+
+ lp5523_load_engine(chip);
+
+ ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]);
+ if (ret)
+ return ret;
+
+ ret = lp55xx_write(chip, LP5523_REG_PROG_MEM, (u8)(mux >> 8));
+ if (ret)
+ return ret;
+
+ ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux));
+ if (ret)
+ return ret;
+
+ engine->led_mux = mux;
+ return 0;
+}
+
+static ssize_t store_engine_leds(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_engine *engine = &chip->engines[nr - 1];
+ u16 mux = 0;
+ ssize_t ret;
+
+ if (lp5523_mux_parse(buf, &mux, len))
+ return -EINVAL;
+
+ mutex_lock(&chip->lock);
+
+ chip->engine_idx = nr;
+ ret = -EINVAL;
+
+ if (engine->mode != LP55XX_ENGINE_LOAD)
+ goto leave;
+
+ if (lp5523_load_mux(chip, mux, nr))
+ goto leave;
+
+ ret = len;
+leave:
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+store_leds(1)
+store_leds(2)
+store_leds(3)
+
+static ssize_t store_engine_load(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+
+ mutex_lock(&chip->lock);
+
+ chip->engine_idx = nr;
+ lp5523_load_engine_and_select_page(chip);
+ ret = lp5523_update_program_memory(chip, buf, len);
+
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+store_load(1)
+store_load(2)
+store_load(3)
+
+static ssize_t lp5523_selftest(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_platform_data *pdata = chip->pdata;
+ int i, ret, pos = 0;
+ u8 status, adc, vdd;
+
+ mutex_lock(&chip->lock);
+
+ ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
+ if (ret < 0)
+ goto fail;
+
+ /* Check that ext clock is really in use if requested */
+ if (pdata->clock_mode == LP55XX_CLOCK_EXT) {
+ if ((status & LP5523_EXT_CLK_USED) == 0)
+ goto fail;
+ }
+
+ /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */
+ lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16);
+ usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */
+ ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
+ if (ret < 0)
+ goto fail;
+
+ if (!(status & LP5523_LEDTEST_DONE))
+ usleep_range(3000, 6000); /* Was not ready. Wait little bit */
+
+ ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd);
+ if (ret < 0)
+ goto fail;
+
+ vdd--; /* There may be some fluctuation in measurement */
+
+ for (i = 0; i < LP5523_MAX_LEDS; i++) {
+ /* Skip non-existing channels */
+ if (pdata->led_config[i].led_current == 0)
+ continue;
+
+ /* Set default current */
+ lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
+ pdata->led_config[i].led_current);
+
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff);
+ /* let current stabilize 2 - 4ms before measurements start */
+ usleep_range(2000, 4000);
+ lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL,
+ LP5523_EN_LEDTEST | i);
+ /* ADC conversion time is 2.7 ms typically */
+ usleep_range(3000, 6000);
+ ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
+ if (ret < 0)
+ goto fail;
+
+ if (!(status & LP5523_LEDTEST_DONE))
+ usleep_range(3000, 6000);/* Was not ready. Wait. */
+
+ ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc);
+ if (ret < 0)
+ goto fail;
+
+ if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
+ pos += sprintf(buf + pos, "LED %d FAIL\n", i);
+
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00);
+
+ /* Restore current */
+ lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
+ led->led_current);
+ led++;
+ }
+ if (pos == 0)
+ pos = sprintf(buf, "OK\n");
+ goto release_lock;
+fail:
+ pos = sprintf(buf, "FAIL\n");
+
+release_lock:
+ mutex_unlock(&chip->lock);
+
+ return pos;
+}
+
+#define show_fader(nr) \
+static ssize_t show_master_fader##nr(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return show_master_fader(dev, attr, buf, nr); \
+}
+
+#define store_fader(nr) \
+static ssize_t store_master_fader##nr(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t len) \
+{ \
+ return store_master_fader(dev, attr, buf, len, nr); \
+}
+
+static ssize_t show_master_fader(struct device *dev,
+ struct device_attribute *attr,
+ char *buf, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+ u8 val;
+
+ mutex_lock(&chip->lock);
+ ret = lp55xx_read(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, &val);
+ mutex_unlock(&chip->lock);
+
+ if (ret == 0)
+ ret = sprintf(buf, "%u\n", val);
+
+ return ret;
+}
+show_fader(1)
+show_fader(2)
+show_fader(3)
+
+static ssize_t store_master_fader(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+ unsigned long val;
+
+ if (kstrtoul(buf, 0, &val))
+ return -EINVAL;
+
+ if (val > 0xff)
+ return -EINVAL;
+
+ mutex_lock(&chip->lock);
+ ret = lp55xx_write(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1,
+ (u8)val);
+ mutex_unlock(&chip->lock);
+
+ if (ret == 0)
+ ret = len;
+
+ return ret;
+}
+store_fader(1)
+store_fader(2)
+store_fader(3)
+
+static ssize_t show_master_fader_leds(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int i, ret, pos = 0;
+ u8 val;
+
+ mutex_lock(&chip->lock);
+
+ for (i = 0; i < LP5523_MAX_LEDS; i++) {
+ ret = lp55xx_read(chip, LP5523_REG_LED_CTRL_BASE + i, &val);
+ if (ret)
+ goto leave;
+
+ val = (val & LP5523_FADER_MAPPING_MASK)
+ >> LP5523_FADER_MAPPING_SHIFT;
+ if (val > 3) {
+ ret = -EINVAL;
+ goto leave;
+ }
+ buf[pos++] = val + '0';
+ }
+ buf[pos++] = '\n';
+ ret = pos;
+leave:
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static ssize_t store_master_fader_leds(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int i, n, ret;
+ u8 val;
+
+ n = min_t(int, len, LP5523_MAX_LEDS);
+
+ mutex_lock(&chip->lock);
+
+ for (i = 0; i < n; i++) {
+ if (buf[i] >= '0' && buf[i] <= '3') {
+ val = (buf[i] - '0') << LP5523_FADER_MAPPING_SHIFT;
+ ret = lp55xx_update_bits(chip,
+ LP5523_REG_LED_CTRL_BASE + i,
+ LP5523_FADER_MAPPING_MASK,
+ val);
+ if (ret)
+ goto leave;
+ } else {
+ ret = -EINVAL;
+ goto leave;
+ }
+ }
+ ret = len;
+leave:
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static int lp5523_multicolor_brightness(struct lp55xx_led *led)
+{
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+ int i;
+
+ mutex_lock(&chip->lock);
+ for (i = 0; i < led->mc_cdev.num_colors; i++) {
+ ret = lp55xx_write(chip,
+ LP5523_REG_LED_PWM_BASE +
+ led->mc_cdev.subled_info[i].channel,
+ led->mc_cdev.subled_info[i].brightness);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static int lp5523_led_brightness(struct lp55xx_led *led)
+{
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+
+ mutex_lock(&chip->lock);
+ ret = lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
+ led->brightness);
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode);
+static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode);
+static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode);
+static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds);
+static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds);
+static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds);
+static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load);
+static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load);
+static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load);
+static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest);
+static LP55XX_DEV_ATTR_RW(master_fader1, show_master_fader1,
+ store_master_fader1);
+static LP55XX_DEV_ATTR_RW(master_fader2, show_master_fader2,
+ store_master_fader2);
+static LP55XX_DEV_ATTR_RW(master_fader3, show_master_fader3,
+ store_master_fader3);
+static LP55XX_DEV_ATTR_RW(master_fader_leds, show_master_fader_leds,
+ store_master_fader_leds);
+
+static struct attribute *lp5523_attributes[] = {
+ &dev_attr_engine1_mode.attr,
+ &dev_attr_engine2_mode.attr,
+ &dev_attr_engine3_mode.attr,
+ &dev_attr_engine1_load.attr,
+ &dev_attr_engine2_load.attr,
+ &dev_attr_engine3_load.attr,
+ &dev_attr_engine1_leds.attr,
+ &dev_attr_engine2_leds.attr,
+ &dev_attr_engine3_leds.attr,
+ &dev_attr_selftest.attr,
+ &dev_attr_master_fader1.attr,
+ &dev_attr_master_fader2.attr,
+ &dev_attr_master_fader3.attr,
+ &dev_attr_master_fader_leds.attr,
+ NULL,
+};
+
+static const struct attribute_group lp5523_group = {
+ .attrs = lp5523_attributes,
+};
+
+/* Chip specific configurations */
+static struct lp55xx_device_config lp5523_cfg = {
+ .reset = {
+ .addr = LP5523_REG_RESET,
+ .val = LP5523_RESET,
+ },
+ .enable = {
+ .addr = LP5523_REG_ENABLE,
+ .val = LP5523_ENABLE,
+ },
+ .max_channel = LP5523_MAX_LEDS,
+ .post_init_device = lp5523_post_init_device,
+ .brightness_fn = lp5523_led_brightness,
+ .multicolor_brightness_fn = lp5523_multicolor_brightness,
+ .set_led_current = lp5523_set_led_current,
+ .firmware_cb = lp5523_firmware_loaded,
+ .run_engine = lp5523_run_engine,
+ .dev_attr_group = &lp5523_group,
+};
+
+static int lp5523_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct lp55xx_chip *chip;
+ struct lp55xx_led *led;
+ struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
+ struct device_node *np = dev_of_node(&client->dev);
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->cfg = &lp5523_cfg;
+
+ if (!pdata) {
+ if (np) {
+ pdata = lp55xx_of_populate_pdata(&client->dev, np,
+ chip);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ } else {
+ dev_err(&client->dev, "no platform data\n");
+ return -EINVAL;
+ }
+ }
+
+ led = devm_kcalloc(&client->dev,
+ pdata->num_channels, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ chip->cl = client;
+ chip->pdata = pdata;
+
+ mutex_init(&chip->lock);
+
+ i2c_set_clientdata(client, led);
+
+ ret = lp55xx_init_device(chip);
+ if (ret)
+ goto err_init;
+
+ dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
+
+ ret = lp55xx_register_leds(led, chip);
+ if (ret)
+ goto err_out;
+
+ ret = lp55xx_register_sysfs(chip);
+ if (ret) {
+ dev_err(&client->dev, "registering sysfs failed\n");
+ goto err_out;
+ }
+
+ return 0;
+
+err_out:
+ lp55xx_deinit_device(chip);
+err_init:
+ return ret;
+}
+
+static void lp5523_remove(struct i2c_client *client)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(client);
+ struct lp55xx_chip *chip = led->chip;
+
+ lp5523_stop_all_engines(chip);
+ lp55xx_unregister_sysfs(chip);
+ lp55xx_deinit_device(chip);
+}
+
+static const struct i2c_device_id lp5523_id[] = {
+ { "lp5523", LP5523 },
+ { "lp55231", LP55231 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, lp5523_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id of_lp5523_leds_match[] = {
+ { .compatible = "national,lp5523", },
+ { .compatible = "ti,lp55231", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, of_lp5523_leds_match);
+#endif
+
+static struct i2c_driver lp5523_driver = {
+ .driver = {
+ .name = "lp5523x",
+ .of_match_table = of_match_ptr(of_lp5523_leds_match),
+ },
+ .probe = lp5523_probe,
+ .remove = lp5523_remove,
+ .id_table = lp5523_id,
+};
+
+module_i2c_driver(lp5523_driver);
+
+MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>");
+MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
+MODULE_DESCRIPTION("LP5523 LED engine");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-lp5562.c b/drivers/leds/leds-lp5562.c
new file mode 100644
index 000000000..0e490085f
--- /dev/null
+++ b/drivers/leds/leds-lp5562.c
@@ -0,0 +1,616 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LP5562 LED driver
+ *
+ * Copyright (C) 2013 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/platform_data/leds-lp55xx.h>
+#include <linux/slab.h>
+
+#include "leds-lp55xx-common.h"
+
+#define LP5562_PROGRAM_LENGTH 32
+#define LP5562_MAX_LEDS 4
+
+/* ENABLE Register 00h */
+#define LP5562_REG_ENABLE 0x00
+#define LP5562_EXEC_ENG1_M 0x30
+#define LP5562_EXEC_ENG2_M 0x0C
+#define LP5562_EXEC_ENG3_M 0x03
+#define LP5562_EXEC_M 0x3F
+#define LP5562_MASTER_ENABLE 0x40 /* Chip master enable */
+#define LP5562_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */
+#define LP5562_EXEC_RUN 0x2A
+#define LP5562_ENABLE_DEFAULT \
+ (LP5562_MASTER_ENABLE | LP5562_LOGARITHMIC_PWM)
+#define LP5562_ENABLE_RUN_PROGRAM \
+ (LP5562_ENABLE_DEFAULT | LP5562_EXEC_RUN)
+
+/* OPMODE Register 01h */
+#define LP5562_REG_OP_MODE 0x01
+#define LP5562_MODE_ENG1_M 0x30
+#define LP5562_MODE_ENG2_M 0x0C
+#define LP5562_MODE_ENG3_M 0x03
+#define LP5562_LOAD_ENG1 0x10
+#define LP5562_LOAD_ENG2 0x04
+#define LP5562_LOAD_ENG3 0x01
+#define LP5562_RUN_ENG1 0x20
+#define LP5562_RUN_ENG2 0x08
+#define LP5562_RUN_ENG3 0x02
+#define LP5562_ENG1_IS_LOADING(mode) \
+ ((mode & LP5562_MODE_ENG1_M) == LP5562_LOAD_ENG1)
+#define LP5562_ENG2_IS_LOADING(mode) \
+ ((mode & LP5562_MODE_ENG2_M) == LP5562_LOAD_ENG2)
+#define LP5562_ENG3_IS_LOADING(mode) \
+ ((mode & LP5562_MODE_ENG3_M) == LP5562_LOAD_ENG3)
+
+/* BRIGHTNESS Registers */
+#define LP5562_REG_R_PWM 0x04
+#define LP5562_REG_G_PWM 0x03
+#define LP5562_REG_B_PWM 0x02
+#define LP5562_REG_W_PWM 0x0E
+
+/* CURRENT Registers */
+#define LP5562_REG_R_CURRENT 0x07
+#define LP5562_REG_G_CURRENT 0x06
+#define LP5562_REG_B_CURRENT 0x05
+#define LP5562_REG_W_CURRENT 0x0F
+
+/* CONFIG Register 08h */
+#define LP5562_REG_CONFIG 0x08
+#define LP5562_PWM_HF 0x40
+#define LP5562_PWRSAVE_EN 0x20
+#define LP5562_CLK_INT 0x01 /* Internal clock */
+#define LP5562_DEFAULT_CFG (LP5562_PWM_HF | LP5562_PWRSAVE_EN)
+
+/* RESET Register 0Dh */
+#define LP5562_REG_RESET 0x0D
+#define LP5562_RESET 0xFF
+
+/* PROGRAM ENGINE Registers */
+#define LP5562_REG_PROG_MEM_ENG1 0x10
+#define LP5562_REG_PROG_MEM_ENG2 0x30
+#define LP5562_REG_PROG_MEM_ENG3 0x50
+
+/* LEDMAP Register 70h */
+#define LP5562_REG_ENG_SEL 0x70
+#define LP5562_ENG_SEL_PWM 0
+#define LP5562_ENG_FOR_RGB_M 0x3F
+#define LP5562_ENG_SEL_RGB 0x1B /* R:ENG1, G:ENG2, B:ENG3 */
+#define LP5562_ENG_FOR_W_M 0xC0
+#define LP5562_ENG1_FOR_W 0x40 /* W:ENG1 */
+#define LP5562_ENG2_FOR_W 0x80 /* W:ENG2 */
+#define LP5562_ENG3_FOR_W 0xC0 /* W:ENG3 */
+
+/* Program Commands */
+#define LP5562_CMD_DISABLE 0x00
+#define LP5562_CMD_LOAD 0x15
+#define LP5562_CMD_RUN 0x2A
+#define LP5562_CMD_DIRECT 0x3F
+#define LP5562_PATTERN_OFF 0
+
+static inline void lp5562_wait_opmode_done(void)
+{
+ /* operation mode change needs to be longer than 153 us */
+ usleep_range(200, 300);
+}
+
+static inline void lp5562_wait_enable_done(void)
+{
+ /* it takes more 488 us to update ENABLE register */
+ usleep_range(500, 600);
+}
+
+static void lp5562_set_led_current(struct lp55xx_led *led, u8 led_current)
+{
+ static const u8 addr[] = {
+ LP5562_REG_R_CURRENT,
+ LP5562_REG_G_CURRENT,
+ LP5562_REG_B_CURRENT,
+ LP5562_REG_W_CURRENT,
+ };
+
+ led->led_current = led_current;
+ lp55xx_write(led->chip, addr[led->chan_nr], led_current);
+}
+
+static void lp5562_load_engine(struct lp55xx_chip *chip)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ static const u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP5562_MODE_ENG1_M,
+ [LP55XX_ENGINE_2] = LP5562_MODE_ENG2_M,
+ [LP55XX_ENGINE_3] = LP5562_MODE_ENG3_M,
+ };
+
+ static const u8 val[] = {
+ [LP55XX_ENGINE_1] = LP5562_LOAD_ENG1,
+ [LP55XX_ENGINE_2] = LP5562_LOAD_ENG2,
+ [LP55XX_ENGINE_3] = LP5562_LOAD_ENG3,
+ };
+
+ lp55xx_update_bits(chip, LP5562_REG_OP_MODE, mask[idx], val[idx]);
+
+ lp5562_wait_opmode_done();
+}
+
+static void lp5562_stop_engine(struct lp55xx_chip *chip)
+{
+ lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DISABLE);
+ lp5562_wait_opmode_done();
+}
+
+static void lp5562_run_engine(struct lp55xx_chip *chip, bool start)
+{
+ int ret;
+ u8 mode;
+ u8 exec;
+
+ /* stop engine */
+ if (!start) {
+ lp55xx_write(chip, LP5562_REG_ENABLE, LP5562_ENABLE_DEFAULT);
+ lp5562_wait_enable_done();
+ lp5562_stop_engine(chip);
+ lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM);
+ lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT);
+ lp5562_wait_opmode_done();
+ return;
+ }
+
+ /*
+ * To run the engine,
+ * operation mode and enable register should updated at the same time
+ */
+
+ ret = lp55xx_read(chip, LP5562_REG_OP_MODE, &mode);
+ if (ret)
+ return;
+
+ ret = lp55xx_read(chip, LP5562_REG_ENABLE, &exec);
+ if (ret)
+ return;
+
+ /* change operation mode to RUN only when each engine is loading */
+ if (LP5562_ENG1_IS_LOADING(mode)) {
+ mode = (mode & ~LP5562_MODE_ENG1_M) | LP5562_RUN_ENG1;
+ exec = (exec & ~LP5562_EXEC_ENG1_M) | LP5562_RUN_ENG1;
+ }
+
+ if (LP5562_ENG2_IS_LOADING(mode)) {
+ mode = (mode & ~LP5562_MODE_ENG2_M) | LP5562_RUN_ENG2;
+ exec = (exec & ~LP5562_EXEC_ENG2_M) | LP5562_RUN_ENG2;
+ }
+
+ if (LP5562_ENG3_IS_LOADING(mode)) {
+ mode = (mode & ~LP5562_MODE_ENG3_M) | LP5562_RUN_ENG3;
+ exec = (exec & ~LP5562_EXEC_ENG3_M) | LP5562_RUN_ENG3;
+ }
+
+ lp55xx_write(chip, LP5562_REG_OP_MODE, mode);
+ lp5562_wait_opmode_done();
+
+ lp55xx_update_bits(chip, LP5562_REG_ENABLE, LP5562_EXEC_M, exec);
+ lp5562_wait_enable_done();
+}
+
+static int lp5562_update_firmware(struct lp55xx_chip *chip,
+ const u8 *data, size_t size)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ u8 pattern[LP5562_PROGRAM_LENGTH] = {0};
+ static const u8 addr[] = {
+ [LP55XX_ENGINE_1] = LP5562_REG_PROG_MEM_ENG1,
+ [LP55XX_ENGINE_2] = LP5562_REG_PROG_MEM_ENG2,
+ [LP55XX_ENGINE_3] = LP5562_REG_PROG_MEM_ENG3,
+ };
+ unsigned cmd;
+ char c[3];
+ int program_size;
+ int nrchars;
+ int offset = 0;
+ int ret;
+ int i;
+
+ /* clear program memory before updating */
+ for (i = 0; i < LP5562_PROGRAM_LENGTH; i++)
+ lp55xx_write(chip, addr[idx] + i, 0);
+
+ i = 0;
+ while ((offset < size - 1) && (i < LP5562_PROGRAM_LENGTH)) {
+ /* separate sscanfs because length is working only for %s */
+ ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
+ if (ret != 1)
+ goto err;
+
+ ret = sscanf(c, "%2x", &cmd);
+ if (ret != 1)
+ goto err;
+
+ pattern[i] = (u8)cmd;
+ offset += nrchars;
+ i++;
+ }
+
+ /* Each instruction is 16bit long. Check that length is even */
+ if (i % 2)
+ goto err;
+
+ program_size = i;
+ for (i = 0; i < program_size; i++)
+ lp55xx_write(chip, addr[idx] + i, pattern[i]);
+
+ return 0;
+
+err:
+ dev_err(&chip->cl->dev, "wrong pattern format\n");
+ return -EINVAL;
+}
+
+static void lp5562_firmware_loaded(struct lp55xx_chip *chip)
+{
+ const struct firmware *fw = chip->fw;
+
+ /*
+ * the firmware is encoded in ascii hex character, with 2 chars
+ * per byte
+ */
+ if (fw->size > (LP5562_PROGRAM_LENGTH * 2)) {
+ dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
+ fw->size);
+ return;
+ }
+
+ /*
+ * Program memory sequence
+ * 1) set engine mode to "LOAD"
+ * 2) write firmware data into program memory
+ */
+
+ lp5562_load_engine(chip);
+ lp5562_update_firmware(chip, fw->data, fw->size);
+}
+
+static int lp5562_post_init_device(struct lp55xx_chip *chip)
+{
+ int ret;
+ u8 cfg = LP5562_DEFAULT_CFG;
+
+ /* Set all PWMs to direct control mode */
+ ret = lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT);
+ if (ret)
+ return ret;
+
+ lp5562_wait_opmode_done();
+
+ /* Update configuration for the clock setting */
+ if (!lp55xx_is_extclk_used(chip))
+ cfg |= LP5562_CLK_INT;
+
+ ret = lp55xx_write(chip, LP5562_REG_CONFIG, cfg);
+ if (ret)
+ return ret;
+
+ /* Initialize all channels PWM to zero -> leds off */
+ lp55xx_write(chip, LP5562_REG_R_PWM, 0);
+ lp55xx_write(chip, LP5562_REG_G_PWM, 0);
+ lp55xx_write(chip, LP5562_REG_B_PWM, 0);
+ lp55xx_write(chip, LP5562_REG_W_PWM, 0);
+
+ /* Set LED map as register PWM by default */
+ lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM);
+
+ return 0;
+}
+
+static int lp5562_led_brightness(struct lp55xx_led *led)
+{
+ struct lp55xx_chip *chip = led->chip;
+ static const u8 addr[] = {
+ LP5562_REG_R_PWM,
+ LP5562_REG_G_PWM,
+ LP5562_REG_B_PWM,
+ LP5562_REG_W_PWM,
+ };
+ int ret;
+
+ mutex_lock(&chip->lock);
+ ret = lp55xx_write(chip, addr[led->chan_nr], led->brightness);
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static void lp5562_write_program_memory(struct lp55xx_chip *chip,
+ u8 base, const u8 *rgb, int size)
+{
+ int i;
+
+ if (!rgb || size <= 0)
+ return;
+
+ for (i = 0; i < size; i++)
+ lp55xx_write(chip, base + i, *(rgb + i));
+
+ lp55xx_write(chip, base + i, 0);
+ lp55xx_write(chip, base + i + 1, 0);
+}
+
+/* check the size of program count */
+static inline bool _is_pc_overflow(struct lp55xx_predef_pattern *ptn)
+{
+ return ptn->size_r >= LP5562_PROGRAM_LENGTH ||
+ ptn->size_g >= LP5562_PROGRAM_LENGTH ||
+ ptn->size_b >= LP5562_PROGRAM_LENGTH;
+}
+
+static int lp5562_run_predef_led_pattern(struct lp55xx_chip *chip, int mode)
+{
+ struct lp55xx_predef_pattern *ptn;
+ int i;
+
+ if (mode == LP5562_PATTERN_OFF) {
+ lp5562_run_engine(chip, false);
+ return 0;
+ }
+
+ ptn = chip->pdata->patterns + (mode - 1);
+ if (!ptn || _is_pc_overflow(ptn)) {
+ dev_err(&chip->cl->dev, "invalid pattern data\n");
+ return -EINVAL;
+ }
+
+ lp5562_stop_engine(chip);
+
+ /* Set LED map as RGB */
+ lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_RGB);
+
+ /* Load engines */
+ for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
+ chip->engine_idx = i;
+ lp5562_load_engine(chip);
+ }
+
+ /* Clear program registers */
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1, 0);
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1 + 1, 0);
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2, 0);
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2 + 1, 0);
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3, 0);
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3 + 1, 0);
+
+ /* Program engines */
+ lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG1,
+ ptn->r, ptn->size_r);
+ lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG2,
+ ptn->g, ptn->size_g);
+ lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG3,
+ ptn->b, ptn->size_b);
+
+ /* Run engines */
+ lp5562_run_engine(chip, true);
+
+ return 0;
+}
+
+static ssize_t lp5562_store_pattern(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_predef_pattern *ptn = chip->pdata->patterns;
+ int num_patterns = chip->pdata->num_patterns;
+ unsigned long mode;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &mode);
+ if (ret)
+ return ret;
+
+ if (mode > num_patterns || !ptn)
+ return -EINVAL;
+
+ mutex_lock(&chip->lock);
+ ret = lp5562_run_predef_led_pattern(chip, mode);
+ mutex_unlock(&chip->lock);
+
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static ssize_t lp5562_store_engine_mux(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ u8 mask;
+ u8 val;
+
+ /* LED map
+ * R ... Engine 1 (fixed)
+ * G ... Engine 2 (fixed)
+ * B ... Engine 3 (fixed)
+ * W ... Engine 1 or 2 or 3
+ */
+
+ if (sysfs_streq(buf, "RGB")) {
+ mask = LP5562_ENG_FOR_RGB_M;
+ val = LP5562_ENG_SEL_RGB;
+ } else if (sysfs_streq(buf, "W")) {
+ enum lp55xx_engine_index idx = chip->engine_idx;
+
+ mask = LP5562_ENG_FOR_W_M;
+ switch (idx) {
+ case LP55XX_ENGINE_1:
+ val = LP5562_ENG1_FOR_W;
+ break;
+ case LP55XX_ENGINE_2:
+ val = LP5562_ENG2_FOR_W;
+ break;
+ case LP55XX_ENGINE_3:
+ val = LP5562_ENG3_FOR_W;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ } else {
+ dev_err(dev, "choose RGB or W\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&chip->lock);
+ lp55xx_update_bits(chip, LP5562_REG_ENG_SEL, mask, val);
+ mutex_unlock(&chip->lock);
+
+ return len;
+}
+
+static LP55XX_DEV_ATTR_WO(led_pattern, lp5562_store_pattern);
+static LP55XX_DEV_ATTR_WO(engine_mux, lp5562_store_engine_mux);
+
+static struct attribute *lp5562_attributes[] = {
+ &dev_attr_led_pattern.attr,
+ &dev_attr_engine_mux.attr,
+ NULL,
+};
+
+static const struct attribute_group lp5562_group = {
+ .attrs = lp5562_attributes,
+};
+
+/* Chip specific configurations */
+static struct lp55xx_device_config lp5562_cfg = {
+ .max_channel = LP5562_MAX_LEDS,
+ .reset = {
+ .addr = LP5562_REG_RESET,
+ .val = LP5562_RESET,
+ },
+ .enable = {
+ .addr = LP5562_REG_ENABLE,
+ .val = LP5562_ENABLE_DEFAULT,
+ },
+ .post_init_device = lp5562_post_init_device,
+ .set_led_current = lp5562_set_led_current,
+ .brightness_fn = lp5562_led_brightness,
+ .run_engine = lp5562_run_engine,
+ .firmware_cb = lp5562_firmware_loaded,
+ .dev_attr_group = &lp5562_group,
+};
+
+static int lp5562_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct lp55xx_chip *chip;
+ struct lp55xx_led *led;
+ struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
+ struct device_node *np = dev_of_node(&client->dev);
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->cfg = &lp5562_cfg;
+
+ if (!pdata) {
+ if (np) {
+ pdata = lp55xx_of_populate_pdata(&client->dev, np,
+ chip);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ } else {
+ dev_err(&client->dev, "no platform data\n");
+ return -EINVAL;
+ }
+ }
+
+
+ led = devm_kcalloc(&client->dev,
+ pdata->num_channels, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ chip->cl = client;
+ chip->pdata = pdata;
+
+ mutex_init(&chip->lock);
+
+ i2c_set_clientdata(client, led);
+
+ ret = lp55xx_init_device(chip);
+ if (ret)
+ goto err_init;
+
+ ret = lp55xx_register_leds(led, chip);
+ if (ret)
+ goto err_out;
+
+ ret = lp55xx_register_sysfs(chip);
+ if (ret) {
+ dev_err(&client->dev, "registering sysfs failed\n");
+ goto err_out;
+ }
+
+ return 0;
+
+err_out:
+ lp55xx_deinit_device(chip);
+err_init:
+ return ret;
+}
+
+static void lp5562_remove(struct i2c_client *client)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(client);
+ struct lp55xx_chip *chip = led->chip;
+
+ lp5562_stop_engine(chip);
+
+ lp55xx_unregister_sysfs(chip);
+ lp55xx_deinit_device(chip);
+}
+
+static const struct i2c_device_id lp5562_id[] = {
+ { "lp5562", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lp5562_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id of_lp5562_leds_match[] = {
+ { .compatible = "ti,lp5562", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, of_lp5562_leds_match);
+#endif
+
+static struct i2c_driver lp5562_driver = {
+ .driver = {
+ .name = "lp5562",
+ .of_match_table = of_match_ptr(of_lp5562_leds_match),
+ },
+ .probe = lp5562_probe,
+ .remove = lp5562_remove,
+ .id_table = lp5562_id,
+};
+
+module_i2c_driver(lp5562_driver);
+
+MODULE_DESCRIPTION("Texas Instruments LP5562 LED Driver");
+MODULE_AUTHOR("Milo Kim");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
new file mode 100644
index 000000000..9fdfc1b9a
--- /dev/null
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -0,0 +1,712 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LP5521/LP5523/LP55231/LP5562 Common Driver
+ *
+ * Copyright 2012 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
+ *
+ * Derived from leds-lp5521.c, leds-lp5523.c
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_data/leds-lp55xx.h>
+#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
+
+#include "leds-lp55xx-common.h"
+
+/* External clock rate */
+#define LP55XX_CLK_32K 32768
+
+static struct lp55xx_led *cdev_to_lp55xx_led(struct led_classdev *cdev)
+{
+ return container_of(cdev, struct lp55xx_led, cdev);
+}
+
+static struct lp55xx_led *dev_to_lp55xx_led(struct device *dev)
+{
+ return cdev_to_lp55xx_led(dev_get_drvdata(dev));
+}
+
+static struct lp55xx_led *mcled_cdev_to_led(struct led_classdev_mc *mc_cdev)
+{
+ return container_of(mc_cdev, struct lp55xx_led, mc_cdev);
+}
+
+static void lp55xx_reset_device(struct lp55xx_chip *chip)
+{
+ struct lp55xx_device_config *cfg = chip->cfg;
+ u8 addr = cfg->reset.addr;
+ u8 val = cfg->reset.val;
+
+ /* no error checking here because no ACK from the device after reset */
+ lp55xx_write(chip, addr, val);
+}
+
+static int lp55xx_detect_device(struct lp55xx_chip *chip)
+{
+ struct lp55xx_device_config *cfg = chip->cfg;
+ u8 addr = cfg->enable.addr;
+ u8 val = cfg->enable.val;
+ int ret;
+
+ ret = lp55xx_write(chip, addr, val);
+ if (ret)
+ return ret;
+
+ usleep_range(1000, 2000);
+
+ ret = lp55xx_read(chip, addr, &val);
+ if (ret)
+ return ret;
+
+ if (val != cfg->enable.val)
+ return -ENODEV;
+
+ return 0;
+}
+
+static int lp55xx_post_init_device(struct lp55xx_chip *chip)
+{
+ struct lp55xx_device_config *cfg = chip->cfg;
+
+ if (!cfg->post_init_device)
+ return 0;
+
+ return cfg->post_init_device(chip);
+}
+
+static ssize_t led_current_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lp55xx_led *led = dev_to_lp55xx_led(dev);
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", led->led_current);
+}
+
+static ssize_t led_current_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = dev_to_lp55xx_led(dev);
+ struct lp55xx_chip *chip = led->chip;
+ unsigned long curr;
+
+ if (kstrtoul(buf, 0, &curr))
+ return -EINVAL;
+
+ if (curr > led->max_current)
+ return -EINVAL;
+
+ if (!chip->cfg->set_led_current)
+ return len;
+
+ mutex_lock(&chip->lock);
+ chip->cfg->set_led_current(led, (u8)curr);
+ mutex_unlock(&chip->lock);
+
+ return len;
+}
+
+static ssize_t max_current_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lp55xx_led *led = dev_to_lp55xx_led(dev);
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", led->max_current);
+}
+
+static DEVICE_ATTR_RW(led_current);
+static DEVICE_ATTR_RO(max_current);
+
+static struct attribute *lp55xx_led_attrs[] = {
+ &dev_attr_led_current.attr,
+ &dev_attr_max_current.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(lp55xx_led);
+
+static int lp55xx_set_mc_brightness(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
+ struct lp55xx_led *led = mcled_cdev_to_led(mc_dev);
+ struct lp55xx_device_config *cfg = led->chip->cfg;
+
+ led_mc_calc_color_components(&led->mc_cdev, brightness);
+ return cfg->multicolor_brightness_fn(led);
+
+}
+
+static int lp55xx_set_brightness(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lp55xx_led *led = cdev_to_lp55xx_led(cdev);
+ struct lp55xx_device_config *cfg = led->chip->cfg;
+
+ led->brightness = (u8)brightness;
+ return cfg->brightness_fn(led);
+}
+
+static int lp55xx_init_led(struct lp55xx_led *led,
+ struct lp55xx_chip *chip, int chan)
+{
+ struct lp55xx_platform_data *pdata = chip->pdata;
+ struct lp55xx_device_config *cfg = chip->cfg;
+ struct device *dev = &chip->cl->dev;
+ int max_channel = cfg->max_channel;
+ struct mc_subled *mc_led_info;
+ struct led_classdev *led_cdev;
+ char name[32];
+ int i, j = 0;
+ int ret;
+
+ if (chan >= max_channel) {
+ dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel);
+ return -EINVAL;
+ }
+
+ if (pdata->led_config[chan].led_current == 0)
+ return 0;
+
+ if (pdata->led_config[chan].name) {
+ led->cdev.name = pdata->led_config[chan].name;
+ } else {
+ snprintf(name, sizeof(name), "%s:channel%d",
+ pdata->label ? : chip->cl->name, chan);
+ led->cdev.name = name;
+ }
+
+ if (pdata->led_config[chan].num_colors > 1) {
+ mc_led_info = devm_kcalloc(dev,
+ pdata->led_config[chan].num_colors,
+ sizeof(*mc_led_info), GFP_KERNEL);
+ if (!mc_led_info)
+ return -ENOMEM;
+
+ led_cdev = &led->mc_cdev.led_cdev;
+ led_cdev->name = led->cdev.name;
+ led_cdev->brightness_set_blocking = lp55xx_set_mc_brightness;
+ led->mc_cdev.num_colors = pdata->led_config[chan].num_colors;
+ for (i = 0; i < led->mc_cdev.num_colors; i++) {
+ mc_led_info[i].color_index =
+ pdata->led_config[chan].color_id[i];
+ mc_led_info[i].channel =
+ pdata->led_config[chan].output_num[i];
+ j++;
+ }
+
+ led->mc_cdev.subled_info = mc_led_info;
+ } else {
+ led->cdev.brightness_set_blocking = lp55xx_set_brightness;
+ }
+
+ led->cdev.groups = lp55xx_led_groups;
+ led->cdev.default_trigger = pdata->led_config[chan].default_trigger;
+ led->led_current = pdata->led_config[chan].led_current;
+ led->max_current = pdata->led_config[chan].max_current;
+ led->chan_nr = pdata->led_config[chan].chan_nr;
+
+ if (led->chan_nr >= max_channel) {
+ dev_err(dev, "Use channel numbers between 0 and %d\n",
+ max_channel - 1);
+ return -EINVAL;
+ }
+
+ if (pdata->led_config[chan].num_colors > 1)
+ ret = devm_led_classdev_multicolor_register(dev, &led->mc_cdev);
+ else
+ ret = devm_led_classdev_register(dev, &led->cdev);
+
+ if (ret) {
+ dev_err(dev, "led register err: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void lp55xx_firmware_loaded(const struct firmware *fw, void *context)
+{
+ struct lp55xx_chip *chip = context;
+ struct device *dev = &chip->cl->dev;
+ enum lp55xx_engine_index idx = chip->engine_idx;
+
+ if (!fw) {
+ dev_err(dev, "firmware request failed\n");
+ return;
+ }
+
+ /* handling firmware data is chip dependent */
+ mutex_lock(&chip->lock);
+
+ chip->engines[idx - 1].mode = LP55XX_ENGINE_LOAD;
+ chip->fw = fw;
+ if (chip->cfg->firmware_cb)
+ chip->cfg->firmware_cb(chip);
+
+ mutex_unlock(&chip->lock);
+
+ /* firmware should be released for other channel use */
+ release_firmware(chip->fw);
+ chip->fw = NULL;
+}
+
+static int lp55xx_request_firmware(struct lp55xx_chip *chip)
+{
+ const char *name = chip->cl->name;
+ struct device *dev = &chip->cl->dev;
+
+ return request_firmware_nowait(THIS_MODULE, false, name, dev,
+ GFP_KERNEL, chip, lp55xx_firmware_loaded);
+}
+
+static ssize_t select_engine_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+
+ return sprintf(buf, "%d\n", chip->engine_idx);
+}
+
+static ssize_t select_engine_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ unsigned long val;
+ int ret;
+
+ if (kstrtoul(buf, 0, &val))
+ return -EINVAL;
+
+ /* select the engine to be run */
+
+ switch (val) {
+ case LP55XX_ENGINE_1:
+ case LP55XX_ENGINE_2:
+ case LP55XX_ENGINE_3:
+ mutex_lock(&chip->lock);
+ chip->engine_idx = val;
+ ret = lp55xx_request_firmware(chip);
+ mutex_unlock(&chip->lock);
+ break;
+ default:
+ dev_err(dev, "%lu: invalid engine index. (1, 2, 3)\n", val);
+ return -EINVAL;
+ }
+
+ if (ret) {
+ dev_err(dev, "request firmware err: %d\n", ret);
+ return ret;
+ }
+
+ return len;
+}
+
+static inline void lp55xx_run_engine(struct lp55xx_chip *chip, bool start)
+{
+ if (chip->cfg->run_engine)
+ chip->cfg->run_engine(chip, start);
+}
+
+static ssize_t run_engine_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ unsigned long val;
+
+ if (kstrtoul(buf, 0, &val))
+ return -EINVAL;
+
+ /* run or stop the selected engine */
+
+ if (val <= 0) {
+ lp55xx_run_engine(chip, false);
+ return len;
+ }
+
+ mutex_lock(&chip->lock);
+ lp55xx_run_engine(chip, true);
+ mutex_unlock(&chip->lock);
+
+ return len;
+}
+
+static DEVICE_ATTR_RW(select_engine);
+static DEVICE_ATTR_WO(run_engine);
+
+static struct attribute *lp55xx_engine_attributes[] = {
+ &dev_attr_select_engine.attr,
+ &dev_attr_run_engine.attr,
+ NULL,
+};
+
+static const struct attribute_group lp55xx_engine_attr_group = {
+ .attrs = lp55xx_engine_attributes,
+};
+
+int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val)
+{
+ return i2c_smbus_write_byte_data(chip->cl, reg, val);
+}
+EXPORT_SYMBOL_GPL(lp55xx_write);
+
+int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val)
+{
+ s32 ret;
+
+ ret = i2c_smbus_read_byte_data(chip->cl, reg);
+ if (ret < 0)
+ return ret;
+
+ *val = ret;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lp55xx_read);
+
+int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, u8 mask, u8 val)
+{
+ int ret;
+ u8 tmp;
+
+ ret = lp55xx_read(chip, reg, &tmp);
+ if (ret)
+ return ret;
+
+ tmp &= ~mask;
+ tmp |= val & mask;
+
+ return lp55xx_write(chip, reg, tmp);
+}
+EXPORT_SYMBOL_GPL(lp55xx_update_bits);
+
+bool lp55xx_is_extclk_used(struct lp55xx_chip *chip)
+{
+ struct clk *clk;
+ int err;
+
+ clk = devm_clk_get(&chip->cl->dev, "32k_clk");
+ if (IS_ERR(clk))
+ goto use_internal_clk;
+
+ err = clk_prepare_enable(clk);
+ if (err)
+ goto use_internal_clk;
+
+ if (clk_get_rate(clk) != LP55XX_CLK_32K) {
+ clk_disable_unprepare(clk);
+ goto use_internal_clk;
+ }
+
+ dev_info(&chip->cl->dev, "%dHz external clock used\n", LP55XX_CLK_32K);
+
+ chip->clk = clk;
+ return true;
+
+use_internal_clk:
+ dev_info(&chip->cl->dev, "internal clock used\n");
+ return false;
+}
+EXPORT_SYMBOL_GPL(lp55xx_is_extclk_used);
+
+int lp55xx_init_device(struct lp55xx_chip *chip)
+{
+ struct lp55xx_platform_data *pdata;
+ struct lp55xx_device_config *cfg;
+ struct device *dev = &chip->cl->dev;
+ int ret = 0;
+
+ WARN_ON(!chip);
+
+ pdata = chip->pdata;
+ cfg = chip->cfg;
+
+ if (!pdata || !cfg)
+ return -EINVAL;
+
+ if (pdata->enable_gpiod) {
+ gpiod_direction_output(pdata->enable_gpiod, 0);
+
+ gpiod_set_consumer_name(pdata->enable_gpiod, "LP55xx enable");
+ gpiod_set_value(pdata->enable_gpiod, 0);
+ usleep_range(1000, 2000); /* Keep enable down at least 1ms */
+ gpiod_set_value(pdata->enable_gpiod, 1);
+ usleep_range(1000, 2000); /* 500us abs min. */
+ }
+
+ lp55xx_reset_device(chip);
+
+ /*
+ * Exact value is not available. 10 - 20ms
+ * appears to be enough for reset.
+ */
+ usleep_range(10000, 20000);
+
+ ret = lp55xx_detect_device(chip);
+ if (ret) {
+ dev_err(dev, "device detection err: %d\n", ret);
+ goto err;
+ }
+
+ /* chip specific initialization */
+ ret = lp55xx_post_init_device(chip);
+ if (ret) {
+ dev_err(dev, "post init device err: %d\n", ret);
+ goto err_post_init;
+ }
+
+ return 0;
+
+err_post_init:
+ lp55xx_deinit_device(chip);
+err:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(lp55xx_init_device);
+
+void lp55xx_deinit_device(struct lp55xx_chip *chip)
+{
+ struct lp55xx_platform_data *pdata = chip->pdata;
+
+ if (chip->clk)
+ clk_disable_unprepare(chip->clk);
+
+ if (pdata->enable_gpiod)
+ gpiod_set_value(pdata->enable_gpiod, 0);
+}
+EXPORT_SYMBOL_GPL(lp55xx_deinit_device);
+
+int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
+{
+ struct lp55xx_platform_data *pdata = chip->pdata;
+ struct lp55xx_device_config *cfg = chip->cfg;
+ int num_channels = pdata->num_channels;
+ struct lp55xx_led *each;
+ u8 led_current;
+ int ret;
+ int i;
+
+ if (!cfg->brightness_fn) {
+ dev_err(&chip->cl->dev, "empty brightness configuration\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < num_channels; i++) {
+
+ /* do not initialize channels that are not connected */
+ if (pdata->led_config[i].led_current == 0)
+ continue;
+
+ led_current = pdata->led_config[i].led_current;
+ each = led + i;
+ ret = lp55xx_init_led(each, chip, i);
+ if (ret)
+ goto err_init_led;
+
+ chip->num_leds++;
+ each->chip = chip;
+
+ /* setting led current at each channel */
+ if (cfg->set_led_current)
+ cfg->set_led_current(each, led_current);
+ }
+
+ return 0;
+
+err_init_led:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(lp55xx_register_leds);
+
+int lp55xx_register_sysfs(struct lp55xx_chip *chip)
+{
+ struct device *dev = &chip->cl->dev;
+ struct lp55xx_device_config *cfg = chip->cfg;
+ int ret;
+
+ if (!cfg->run_engine || !cfg->firmware_cb)
+ goto dev_specific_attrs;
+
+ ret = sysfs_create_group(&dev->kobj, &lp55xx_engine_attr_group);
+ if (ret)
+ return ret;
+
+dev_specific_attrs:
+ return cfg->dev_attr_group ?
+ sysfs_create_group(&dev->kobj, cfg->dev_attr_group) : 0;
+}
+EXPORT_SYMBOL_GPL(lp55xx_register_sysfs);
+
+void lp55xx_unregister_sysfs(struct lp55xx_chip *chip)
+{
+ struct device *dev = &chip->cl->dev;
+ struct lp55xx_device_config *cfg = chip->cfg;
+
+ if (cfg->dev_attr_group)
+ sysfs_remove_group(&dev->kobj, cfg->dev_attr_group);
+
+ sysfs_remove_group(&dev->kobj, &lp55xx_engine_attr_group);
+}
+EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs);
+
+static int lp55xx_parse_common_child(struct device_node *np,
+ struct lp55xx_led_config *cfg,
+ int led_number, int *chan_nr)
+{
+ int ret;
+
+ of_property_read_string(np, "chan-name",
+ &cfg[led_number].name);
+ of_property_read_u8(np, "led-cur",
+ &cfg[led_number].led_current);
+ of_property_read_u8(np, "max-cur",
+ &cfg[led_number].max_current);
+
+ ret = of_property_read_u32(np, "reg", chan_nr);
+ if (ret)
+ return ret;
+
+ if (*chan_nr < 0 || *chan_nr > cfg->max_channel)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int lp55xx_parse_multi_led_child(struct device_node *child,
+ struct lp55xx_led_config *cfg,
+ int child_number, int color_number)
+{
+ int chan_nr, color_id, ret;
+
+ ret = lp55xx_parse_common_child(child, cfg, child_number, &chan_nr);
+ if (ret)
+ return ret;
+
+ ret = of_property_read_u32(child, "color", &color_id);
+ if (ret)
+ return ret;
+
+ cfg[child_number].color_id[color_number] = color_id;
+ cfg[child_number].output_num[color_number] = chan_nr;
+
+ return 0;
+}
+
+static int lp55xx_parse_multi_led(struct device_node *np,
+ struct lp55xx_led_config *cfg,
+ int child_number)
+{
+ struct device_node *child;
+ int num_colors = 0, ret;
+
+ for_each_available_child_of_node(np, child) {
+ ret = lp55xx_parse_multi_led_child(child, cfg, child_number,
+ num_colors);
+ if (ret) {
+ of_node_put(child);
+ return ret;
+ }
+ num_colors++;
+ }
+
+ cfg[child_number].num_colors = num_colors;
+
+ return 0;
+}
+
+static int lp55xx_parse_logical_led(struct device_node *np,
+ struct lp55xx_led_config *cfg,
+ int child_number)
+{
+ int led_color, ret;
+ int chan_nr = 0;
+
+ cfg[child_number].default_trigger =
+ of_get_property(np, "linux,default-trigger", NULL);
+
+ ret = of_property_read_u32(np, "color", &led_color);
+ if (ret)
+ return ret;
+
+ if (led_color == LED_COLOR_ID_RGB)
+ return lp55xx_parse_multi_led(np, cfg, child_number);
+
+ ret = lp55xx_parse_common_child(np, cfg, child_number, &chan_nr);
+ if (ret < 0)
+ return ret;
+
+ cfg[child_number].chan_nr = chan_nr;
+
+ return ret;
+}
+
+struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
+ struct device_node *np,
+ struct lp55xx_chip *chip)
+{
+ struct device_node *child;
+ struct lp55xx_platform_data *pdata;
+ struct lp55xx_led_config *cfg;
+ int num_channels;
+ int i = 0;
+ int ret;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ num_channels = of_get_available_child_count(np);
+ if (num_channels == 0) {
+ dev_err(dev, "no LED channels\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ cfg = devm_kcalloc(dev, num_channels, sizeof(*cfg), GFP_KERNEL);
+ if (!cfg)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->led_config = &cfg[0];
+ pdata->num_channels = num_channels;
+ cfg->max_channel = chip->cfg->max_channel;
+
+ for_each_available_child_of_node(np, child) {
+ ret = lp55xx_parse_logical_led(child, cfg, i);
+ if (ret) {
+ of_node_put(child);
+ return ERR_PTR(-EINVAL);
+ }
+ i++;
+ }
+
+ of_property_read_string(np, "label", &pdata->label);
+ of_property_read_u8(np, "clock-mode", &pdata->clock_mode);
+
+ pdata->enable_gpiod = devm_gpiod_get_optional(dev, "enable",
+ GPIOD_ASIS);
+ if (IS_ERR(pdata->enable_gpiod))
+ return ERR_CAST(pdata->enable_gpiod);
+
+ /* LP8501 specific */
+ of_property_read_u8(np, "pwr-sel", (u8 *)&pdata->pwr_sel);
+
+ return pdata;
+}
+EXPORT_SYMBOL_GPL(lp55xx_of_populate_pdata);
+
+MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
+MODULE_DESCRIPTION("LP55xx Common Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h
new file mode 100644
index 000000000..2f38c5b33
--- /dev/null
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -0,0 +1,211 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * LP55XX Common Driver Header
+ *
+ * Copyright (C) 2012 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
+ *
+ * Derived from leds-lp5521.c, leds-lp5523.c
+ */
+
+#ifndef _LEDS_LP55XX_COMMON_H
+#define _LEDS_LP55XX_COMMON_H
+
+#include <linux/led-class-multicolor.h>
+
+enum lp55xx_engine_index {
+ LP55XX_ENGINE_INVALID,
+ LP55XX_ENGINE_1,
+ LP55XX_ENGINE_2,
+ LP55XX_ENGINE_3,
+ LP55XX_ENGINE_MAX = LP55XX_ENGINE_3,
+};
+
+enum lp55xx_engine_mode {
+ LP55XX_ENGINE_DISABLED,
+ LP55XX_ENGINE_LOAD,
+ LP55XX_ENGINE_RUN,
+};
+
+#define LP55XX_DEV_ATTR_RW(name, show, store) \
+ DEVICE_ATTR(name, S_IRUGO | S_IWUSR, show, store)
+#define LP55XX_DEV_ATTR_RO(name, show) \
+ DEVICE_ATTR(name, S_IRUGO, show, NULL)
+#define LP55XX_DEV_ATTR_WO(name, store) \
+ DEVICE_ATTR(name, S_IWUSR, NULL, store)
+
+#define show_mode(nr) \
+static ssize_t show_engine##nr##_mode(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return show_engine_mode(dev, attr, buf, nr); \
+}
+
+#define store_mode(nr) \
+static ssize_t store_engine##nr##_mode(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t len) \
+{ \
+ return store_engine_mode(dev, attr, buf, len, nr); \
+}
+
+#define show_leds(nr) \
+static ssize_t show_engine##nr##_leds(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return show_engine_leds(dev, attr, buf, nr); \
+}
+
+#define store_leds(nr) \
+static ssize_t store_engine##nr##_leds(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t len) \
+{ \
+ return store_engine_leds(dev, attr, buf, len, nr); \
+}
+
+#define store_load(nr) \
+static ssize_t store_engine##nr##_load(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t len) \
+{ \
+ return store_engine_load(dev, attr, buf, len, nr); \
+}
+
+struct lp55xx_led;
+struct lp55xx_chip;
+
+/*
+ * struct lp55xx_reg
+ * @addr : Register address
+ * @val : Register value
+ */
+struct lp55xx_reg {
+ u8 addr;
+ u8 val;
+};
+
+/*
+ * struct lp55xx_device_config
+ * @reset : Chip specific reset command
+ * @enable : Chip specific enable command
+ * @max_channel : Maximum number of channels
+ * @post_init_device : Chip specific initialization code
+ * @brightness_fn : Brightness function
+ * @multicolor_brightness_fn : Multicolor brightness function
+ * @set_led_current : LED current set function
+ * @firmware_cb : Call function when the firmware is loaded
+ * @run_engine : Run internal engine for pattern
+ * @dev_attr_group : Device specific attributes
+ */
+struct lp55xx_device_config {
+ const struct lp55xx_reg reset;
+ const struct lp55xx_reg enable;
+ const int max_channel;
+
+ /* define if the device has specific initialization process */
+ int (*post_init_device) (struct lp55xx_chip *chip);
+
+ /* set LED brightness */
+ int (*brightness_fn)(struct lp55xx_led *led);
+
+ /* set multicolor LED brightness */
+ int (*multicolor_brightness_fn)(struct lp55xx_led *led);
+
+ /* current setting function */
+ void (*set_led_current) (struct lp55xx_led *led, u8 led_current);
+
+ /* access program memory when the firmware is loaded */
+ void (*firmware_cb)(struct lp55xx_chip *chip);
+
+ /* used for running firmware LED patterns */
+ void (*run_engine) (struct lp55xx_chip *chip, bool start);
+
+ /* additional device specific attributes */
+ const struct attribute_group *dev_attr_group;
+};
+
+/*
+ * struct lp55xx_engine
+ * @mode : Engine mode
+ * @led_mux : Mux bits for LED selection. Only used in LP5523
+ */
+struct lp55xx_engine {
+ enum lp55xx_engine_mode mode;
+ u16 led_mux;
+};
+
+/*
+ * struct lp55xx_chip
+ * @cl : I2C communication for access registers
+ * @pdata : Platform specific data
+ * @lock : Lock for user-space interface
+ * @num_leds : Number of registered LEDs
+ * @cfg : Device specific configuration data
+ * @engine_idx : Selected engine number
+ * @engines : Engine structure for the device attribute R/W interface
+ * @fw : Firmware data for running a LED pattern
+ */
+struct lp55xx_chip {
+ struct i2c_client *cl;
+ struct clk *clk;
+ struct lp55xx_platform_data *pdata;
+ struct mutex lock; /* lock for user-space interface */
+ int num_leds;
+ struct lp55xx_device_config *cfg;
+ enum lp55xx_engine_index engine_idx;
+ struct lp55xx_engine engines[LP55XX_ENGINE_MAX];
+ const struct firmware *fw;
+};
+
+/*
+ * struct lp55xx_led
+ * @chan_nr : Channel number
+ * @cdev : LED class device
+ * @mc_cdev : Multi color class device
+ * @color_components: Multi color LED map information
+ * @led_current : Current setting at each led channel
+ * @max_current : Maximun current at each led channel
+ * @brightness : Brightness value
+ * @chip : The lp55xx chip data
+ */
+struct lp55xx_led {
+ int chan_nr;
+ struct led_classdev cdev;
+ struct led_classdev_mc mc_cdev;
+ u8 led_current;
+ u8 max_current;
+ u8 brightness;
+ struct lp55xx_chip *chip;
+};
+
+/* register access */
+extern int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val);
+extern int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val);
+extern int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg,
+ u8 mask, u8 val);
+
+/* external clock detection */
+extern bool lp55xx_is_extclk_used(struct lp55xx_chip *chip);
+
+/* common device init/deinit functions */
+extern int lp55xx_init_device(struct lp55xx_chip *chip);
+extern void lp55xx_deinit_device(struct lp55xx_chip *chip);
+
+/* common LED class device functions */
+extern int lp55xx_register_leds(struct lp55xx_led *led,
+ struct lp55xx_chip *chip);
+
+/* common device attributes functions */
+extern int lp55xx_register_sysfs(struct lp55xx_chip *chip);
+extern void lp55xx_unregister_sysfs(struct lp55xx_chip *chip);
+
+/* common device tree population function */
+extern struct lp55xx_platform_data
+*lp55xx_of_populate_pdata(struct device *dev, struct device_node *np,
+ struct lp55xx_chip *chip);
+
+#endif /* _LEDS_LP55XX_COMMON_H */
diff --git a/drivers/leds/leds-lp8501.c b/drivers/leds/leds-lp8501.c
new file mode 100644
index 000000000..ae11a02c0
--- /dev/null
+++ b/drivers/leds/leds-lp8501.c
@@ -0,0 +1,404 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI LP8501 9 channel LED Driver
+ *
+ * Copyright (C) 2013 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/platform_data/leds-lp55xx.h>
+#include <linux/slab.h>
+
+#include "leds-lp55xx-common.h"
+
+#define LP8501_PROGRAM_LENGTH 32
+#define LP8501_MAX_LEDS 9
+
+/* Registers */
+#define LP8501_REG_ENABLE 0x00
+#define LP8501_ENABLE BIT(6)
+#define LP8501_EXEC_M 0x3F
+#define LP8501_EXEC_ENG1_M 0x30
+#define LP8501_EXEC_ENG2_M 0x0C
+#define LP8501_EXEC_ENG3_M 0x03
+#define LP8501_RUN_ENG1 0x20
+#define LP8501_RUN_ENG2 0x08
+#define LP8501_RUN_ENG3 0x02
+
+#define LP8501_REG_OP_MODE 0x01
+#define LP8501_MODE_ENG1_M 0x30
+#define LP8501_MODE_ENG2_M 0x0C
+#define LP8501_MODE_ENG3_M 0x03
+#define LP8501_LOAD_ENG1 0x10
+#define LP8501_LOAD_ENG2 0x04
+#define LP8501_LOAD_ENG3 0x01
+
+#define LP8501_REG_PWR_CONFIG 0x05
+#define LP8501_PWR_CONFIG_M 0x03
+
+#define LP8501_REG_LED_PWM_BASE 0x16
+
+#define LP8501_REG_LED_CURRENT_BASE 0x26
+
+#define LP8501_REG_CONFIG 0x36
+#define LP8501_PWM_PSAVE BIT(7)
+#define LP8501_AUTO_INC BIT(6)
+#define LP8501_PWR_SAVE BIT(5)
+#define LP8501_CP_AUTO 0x18
+#define LP8501_INT_CLK BIT(0)
+#define LP8501_DEFAULT_CFG \
+ (LP8501_PWM_PSAVE | LP8501_AUTO_INC | LP8501_PWR_SAVE | LP8501_CP_AUTO)
+
+#define LP8501_REG_RESET 0x3D
+#define LP8501_RESET 0xFF
+
+#define LP8501_REG_PROG_PAGE_SEL 0x4F
+#define LP8501_PAGE_ENG1 0
+#define LP8501_PAGE_ENG2 1
+#define LP8501_PAGE_ENG3 2
+
+#define LP8501_REG_PROG_MEM 0x50
+
+#define LP8501_ENG1_IS_LOADING(mode) \
+ ((mode & LP8501_MODE_ENG1_M) == LP8501_LOAD_ENG1)
+#define LP8501_ENG2_IS_LOADING(mode) \
+ ((mode & LP8501_MODE_ENG2_M) == LP8501_LOAD_ENG2)
+#define LP8501_ENG3_IS_LOADING(mode) \
+ ((mode & LP8501_MODE_ENG3_M) == LP8501_LOAD_ENG3)
+
+static inline void lp8501_wait_opmode_done(void)
+{
+ usleep_range(1000, 2000);
+}
+
+static void lp8501_set_led_current(struct lp55xx_led *led, u8 led_current)
+{
+ led->led_current = led_current;
+ lp55xx_write(led->chip, LP8501_REG_LED_CURRENT_BASE + led->chan_nr,
+ led_current);
+}
+
+static int lp8501_post_init_device(struct lp55xx_chip *chip)
+{
+ int ret;
+ u8 val = LP8501_DEFAULT_CFG;
+
+ ret = lp55xx_write(chip, LP8501_REG_ENABLE, LP8501_ENABLE);
+ if (ret)
+ return ret;
+
+ /* Chip startup time is 500 us, 1 - 2 ms gives some margin */
+ usleep_range(1000, 2000);
+
+ if (chip->pdata->clock_mode != LP55XX_CLOCK_EXT)
+ val |= LP8501_INT_CLK;
+
+ ret = lp55xx_write(chip, LP8501_REG_CONFIG, val);
+ if (ret)
+ return ret;
+
+ /* Power selection for each output */
+ return lp55xx_update_bits(chip, LP8501_REG_PWR_CONFIG,
+ LP8501_PWR_CONFIG_M, chip->pdata->pwr_sel);
+}
+
+static void lp8501_load_engine(struct lp55xx_chip *chip)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ static const u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP8501_MODE_ENG1_M,
+ [LP55XX_ENGINE_2] = LP8501_MODE_ENG2_M,
+ [LP55XX_ENGINE_3] = LP8501_MODE_ENG3_M,
+ };
+
+ static const u8 val[] = {
+ [LP55XX_ENGINE_1] = LP8501_LOAD_ENG1,
+ [LP55XX_ENGINE_2] = LP8501_LOAD_ENG2,
+ [LP55XX_ENGINE_3] = LP8501_LOAD_ENG3,
+ };
+
+ static const u8 page_sel[] = {
+ [LP55XX_ENGINE_1] = LP8501_PAGE_ENG1,
+ [LP55XX_ENGINE_2] = LP8501_PAGE_ENG2,
+ [LP55XX_ENGINE_3] = LP8501_PAGE_ENG3,
+ };
+
+ lp55xx_update_bits(chip, LP8501_REG_OP_MODE, mask[idx], val[idx]);
+
+ lp8501_wait_opmode_done();
+
+ lp55xx_write(chip, LP8501_REG_PROG_PAGE_SEL, page_sel[idx]);
+}
+
+static void lp8501_stop_engine(struct lp55xx_chip *chip)
+{
+ lp55xx_write(chip, LP8501_REG_OP_MODE, 0);
+ lp8501_wait_opmode_done();
+}
+
+static void lp8501_turn_off_channels(struct lp55xx_chip *chip)
+{
+ int i;
+
+ for (i = 0; i < LP8501_MAX_LEDS; i++)
+ lp55xx_write(chip, LP8501_REG_LED_PWM_BASE + i, 0);
+}
+
+static void lp8501_run_engine(struct lp55xx_chip *chip, bool start)
+{
+ int ret;
+ u8 mode;
+ u8 exec;
+
+ /* stop engine */
+ if (!start) {
+ lp8501_stop_engine(chip);
+ lp8501_turn_off_channels(chip);
+ return;
+ }
+
+ /*
+ * To run the engine,
+ * operation mode and enable register should updated at the same time
+ */
+
+ ret = lp55xx_read(chip, LP8501_REG_OP_MODE, &mode);
+ if (ret)
+ return;
+
+ ret = lp55xx_read(chip, LP8501_REG_ENABLE, &exec);
+ if (ret)
+ return;
+
+ /* change operation mode to RUN only when each engine is loading */
+ if (LP8501_ENG1_IS_LOADING(mode)) {
+ mode = (mode & ~LP8501_MODE_ENG1_M) | LP8501_RUN_ENG1;
+ exec = (exec & ~LP8501_EXEC_ENG1_M) | LP8501_RUN_ENG1;
+ }
+
+ if (LP8501_ENG2_IS_LOADING(mode)) {
+ mode = (mode & ~LP8501_MODE_ENG2_M) | LP8501_RUN_ENG2;
+ exec = (exec & ~LP8501_EXEC_ENG2_M) | LP8501_RUN_ENG2;
+ }
+
+ if (LP8501_ENG3_IS_LOADING(mode)) {
+ mode = (mode & ~LP8501_MODE_ENG3_M) | LP8501_RUN_ENG3;
+ exec = (exec & ~LP8501_EXEC_ENG3_M) | LP8501_RUN_ENG3;
+ }
+
+ lp55xx_write(chip, LP8501_REG_OP_MODE, mode);
+ lp8501_wait_opmode_done();
+
+ lp55xx_update_bits(chip, LP8501_REG_ENABLE, LP8501_EXEC_M, exec);
+}
+
+static int lp8501_update_program_memory(struct lp55xx_chip *chip,
+ const u8 *data, size_t size)
+{
+ u8 pattern[LP8501_PROGRAM_LENGTH] = {0};
+ unsigned cmd;
+ char c[3];
+ int update_size;
+ int nrchars;
+ int offset = 0;
+ int ret;
+ int i;
+
+ /* clear program memory before updating */
+ for (i = 0; i < LP8501_PROGRAM_LENGTH; i++)
+ lp55xx_write(chip, LP8501_REG_PROG_MEM + i, 0);
+
+ i = 0;
+ while ((offset < size - 1) && (i < LP8501_PROGRAM_LENGTH)) {
+ /* separate sscanfs because length is working only for %s */
+ ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
+ if (ret != 1)
+ goto err;
+
+ ret = sscanf(c, "%2x", &cmd);
+ if (ret != 1)
+ goto err;
+
+ pattern[i] = (u8)cmd;
+ offset += nrchars;
+ i++;
+ }
+
+ /* Each instruction is 16bit long. Check that length is even */
+ if (i % 2)
+ goto err;
+
+ update_size = i;
+ for (i = 0; i < update_size; i++)
+ lp55xx_write(chip, LP8501_REG_PROG_MEM + i, pattern[i]);
+
+ return 0;
+
+err:
+ dev_err(&chip->cl->dev, "wrong pattern format\n");
+ return -EINVAL;
+}
+
+static void lp8501_firmware_loaded(struct lp55xx_chip *chip)
+{
+ const struct firmware *fw = chip->fw;
+
+ if (fw->size > LP8501_PROGRAM_LENGTH) {
+ dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
+ fw->size);
+ return;
+ }
+
+ /*
+ * Program memory sequence
+ * 1) set engine mode to "LOAD"
+ * 2) write firmware data into program memory
+ */
+
+ lp8501_load_engine(chip);
+ lp8501_update_program_memory(chip, fw->data, fw->size);
+}
+
+static int lp8501_led_brightness(struct lp55xx_led *led)
+{
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+
+ mutex_lock(&chip->lock);
+ ret = lp55xx_write(chip, LP8501_REG_LED_PWM_BASE + led->chan_nr,
+ led->brightness);
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+/* Chip specific configurations */
+static struct lp55xx_device_config lp8501_cfg = {
+ .reset = {
+ .addr = LP8501_REG_RESET,
+ .val = LP8501_RESET,
+ },
+ .enable = {
+ .addr = LP8501_REG_ENABLE,
+ .val = LP8501_ENABLE,
+ },
+ .max_channel = LP8501_MAX_LEDS,
+ .post_init_device = lp8501_post_init_device,
+ .brightness_fn = lp8501_led_brightness,
+ .set_led_current = lp8501_set_led_current,
+ .firmware_cb = lp8501_firmware_loaded,
+ .run_engine = lp8501_run_engine,
+};
+
+static int lp8501_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct lp55xx_chip *chip;
+ struct lp55xx_led *led;
+ struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
+ struct device_node *np = dev_of_node(&client->dev);
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->cfg = &lp8501_cfg;
+
+ if (!pdata) {
+ if (np) {
+ pdata = lp55xx_of_populate_pdata(&client->dev, np,
+ chip);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ } else {
+ dev_err(&client->dev, "no platform data\n");
+ return -EINVAL;
+ }
+ }
+
+ led = devm_kcalloc(&client->dev,
+ pdata->num_channels, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ chip->cl = client;
+ chip->pdata = pdata;
+
+ mutex_init(&chip->lock);
+
+ i2c_set_clientdata(client, led);
+
+ ret = lp55xx_init_device(chip);
+ if (ret)
+ goto err_init;
+
+ dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
+
+ ret = lp55xx_register_leds(led, chip);
+ if (ret)
+ goto err_out;
+
+ ret = lp55xx_register_sysfs(chip);
+ if (ret) {
+ dev_err(&client->dev, "registering sysfs failed\n");
+ goto err_out;
+ }
+
+ return 0;
+
+err_out:
+ lp55xx_deinit_device(chip);
+err_init:
+ return ret;
+}
+
+static void lp8501_remove(struct i2c_client *client)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(client);
+ struct lp55xx_chip *chip = led->chip;
+
+ lp8501_stop_engine(chip);
+ lp55xx_unregister_sysfs(chip);
+ lp55xx_deinit_device(chip);
+}
+
+static const struct i2c_device_id lp8501_id[] = {
+ { "lp8501", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lp8501_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id of_lp8501_leds_match[] = {
+ { .compatible = "ti,lp8501", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, of_lp8501_leds_match);
+#endif
+
+static struct i2c_driver lp8501_driver = {
+ .driver = {
+ .name = "lp8501",
+ .of_match_table = of_match_ptr(of_lp8501_leds_match),
+ },
+ .probe = lp8501_probe,
+ .remove = lp8501_remove,
+ .id_table = lp8501_id,
+};
+
+module_i2c_driver(lp8501_driver);
+
+MODULE_DESCRIPTION("Texas Instruments LP8501 LED driver");
+MODULE_AUTHOR("Milo Kim");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-lp8788.c b/drivers/leds/leds-lp8788.c
new file mode 100644
index 000000000..9b9525ccc
--- /dev/null
+++ b/drivers/leds/leds-lp8788.c
@@ -0,0 +1,171 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI LP8788 MFD - keyled driver
+ *
+ * Copyright 2012 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/mutex.h>
+#include <linux/mfd/lp8788.h>
+#include <linux/mfd/lp8788-isink.h>
+
+#define MAX_BRIGHTNESS LP8788_ISINK_MAX_PWM
+#define DEFAULT_LED_NAME "keyboard-backlight"
+
+struct lp8788_led {
+ struct lp8788 *lp;
+ struct mutex lock;
+ struct led_classdev led_dev;
+ enum lp8788_isink_number isink_num;
+ int on;
+};
+
+struct lp8788_led_config {
+ enum lp8788_isink_scale scale;
+ enum lp8788_isink_number num;
+ int iout;
+};
+
+static struct lp8788_led_config default_led_config = {
+ .scale = LP8788_ISINK_SCALE_100mA,
+ .num = LP8788_ISINK_3,
+ .iout = 0,
+};
+
+static int lp8788_led_init_device(struct lp8788_led *led,
+ struct lp8788_led_platform_data *pdata)
+{
+ struct lp8788_led_config *cfg = &default_led_config;
+ u8 addr, mask, val;
+ int ret;
+
+ if (pdata) {
+ cfg->scale = pdata->scale;
+ cfg->num = pdata->num;
+ cfg->iout = pdata->iout_code;
+ }
+
+ led->isink_num = cfg->num;
+
+ /* scale configuration */
+ addr = LP8788_ISINK_CTRL;
+ mask = 1 << (cfg->num + LP8788_ISINK_SCALE_OFFSET);
+ val = cfg->scale << (cfg->num + LP8788_ISINK_SCALE_OFFSET);
+ ret = lp8788_update_bits(led->lp, addr, mask, val);
+ if (ret)
+ return ret;
+
+ /* current configuration */
+ addr = lp8788_iout_addr[cfg->num];
+ mask = lp8788_iout_mask[cfg->num];
+ val = cfg->iout;
+
+ return lp8788_update_bits(led->lp, addr, mask, val);
+}
+
+static int lp8788_led_enable(struct lp8788_led *led,
+ enum lp8788_isink_number num, int on)
+{
+ int ret;
+
+ u8 mask = 1 << num;
+ u8 val = on << num;
+
+ ret = lp8788_update_bits(led->lp, LP8788_ISINK_CTRL, mask, val);
+ if (ret == 0)
+ led->on = on;
+
+ return ret;
+}
+
+static int lp8788_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness val)
+{
+ struct lp8788_led *led =
+ container_of(led_cdev, struct lp8788_led, led_dev);
+
+ enum lp8788_isink_number num = led->isink_num;
+ int enable, ret;
+
+ mutex_lock(&led->lock);
+
+ switch (num) {
+ case LP8788_ISINK_1:
+ case LP8788_ISINK_2:
+ case LP8788_ISINK_3:
+ ret = lp8788_write_byte(led->lp, lp8788_pwm_addr[num], val);
+ if (ret < 0)
+ goto unlock;
+ break;
+ default:
+ mutex_unlock(&led->lock);
+ return -EINVAL;
+ }
+
+ enable = (val > 0) ? 1 : 0;
+ if (enable != led->on)
+ ret = lp8788_led_enable(led, num, enable);
+unlock:
+ mutex_unlock(&led->lock);
+ return ret;
+}
+
+static int lp8788_led_probe(struct platform_device *pdev)
+{
+ struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent);
+ struct lp8788_led_platform_data *led_pdata;
+ struct lp8788_led *led;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ led = devm_kzalloc(dev, sizeof(struct lp8788_led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->lp = lp;
+ led->led_dev.max_brightness = MAX_BRIGHTNESS;
+ led->led_dev.brightness_set_blocking = lp8788_brightness_set;
+
+ led_pdata = lp->pdata ? lp->pdata->led_pdata : NULL;
+
+ if (!led_pdata || !led_pdata->name)
+ led->led_dev.name = DEFAULT_LED_NAME;
+ else
+ led->led_dev.name = led_pdata->name;
+
+ mutex_init(&led->lock);
+
+ ret = lp8788_led_init_device(led, led_pdata);
+ if (ret) {
+ dev_err(dev, "led init device err: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_led_classdev_register(dev, &led->led_dev);
+ if (ret) {
+ dev_err(dev, "led register err: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver lp8788_led_driver = {
+ .probe = lp8788_led_probe,
+ .driver = {
+ .name = LP8788_DEV_KEYLED,
+ },
+};
+module_platform_driver(lp8788_led_driver);
+
+MODULE_DESCRIPTION("Texas Instruments LP8788 Keyboard LED Driver");
+MODULE_AUTHOR("Milo Kim");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:lp8788-keyled");
diff --git a/drivers/leds/leds-lp8860.c b/drivers/leds/leds-lp8860.c
new file mode 100644
index 000000000..e2b36d318
--- /dev/null
+++ b/drivers/leds/leds-lp8860.c
@@ -0,0 +1,491 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI LP8860 4-Channel LED Driver
+ *
+ * Copyright (C) 2014 Texas Instruments
+ *
+ * Author: Dan Murphy <dmurphy@ti.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/slab.h>
+
+#define LP8860_DISP_CL1_BRT_MSB 0x00
+#define LP8860_DISP_CL1_BRT_LSB 0x01
+#define LP8860_DISP_CL1_CURR_MSB 0x02
+#define LP8860_DISP_CL1_CURR_LSB 0x03
+#define LP8860_CL2_BRT_MSB 0x04
+#define LP8860_CL2_BRT_LSB 0x05
+#define LP8860_CL2_CURRENT 0x06
+#define LP8860_CL3_BRT_MSB 0x07
+#define LP8860_CL3_BRT_LSB 0x08
+#define LP8860_CL3_CURRENT 0x09
+#define LP8860_CL4_BRT_MSB 0x0a
+#define LP8860_CL4_BRT_LSB 0x0b
+#define LP8860_CL4_CURRENT 0x0c
+#define LP8860_CONFIG 0x0d
+#define LP8860_STATUS 0x0e
+#define LP8860_FAULT 0x0f
+#define LP8860_LED_FAULT 0x10
+#define LP8860_FAULT_CLEAR 0x11
+#define LP8860_ID 0x12
+#define LP8860_TEMP_MSB 0x13
+#define LP8860_TEMP_LSB 0x14
+#define LP8860_DISP_LED_CURR_MSB 0x15
+#define LP8860_DISP_LED_CURR_LSB 0x16
+#define LP8860_DISP_LED_PWM_MSB 0x17
+#define LP8860_DISP_LED_PWM_LSB 0x18
+#define LP8860_EEPROM_CNTRL 0x19
+#define LP8860_EEPROM_UNLOCK 0x1a
+
+#define LP8860_EEPROM_REG_0 0x60
+#define LP8860_EEPROM_REG_1 0x61
+#define LP8860_EEPROM_REG_2 0x62
+#define LP8860_EEPROM_REG_3 0x63
+#define LP8860_EEPROM_REG_4 0x64
+#define LP8860_EEPROM_REG_5 0x65
+#define LP8860_EEPROM_REG_6 0x66
+#define LP8860_EEPROM_REG_7 0x67
+#define LP8860_EEPROM_REG_8 0x68
+#define LP8860_EEPROM_REG_9 0x69
+#define LP8860_EEPROM_REG_10 0x6a
+#define LP8860_EEPROM_REG_11 0x6b
+#define LP8860_EEPROM_REG_12 0x6c
+#define LP8860_EEPROM_REG_13 0x6d
+#define LP8860_EEPROM_REG_14 0x6e
+#define LP8860_EEPROM_REG_15 0x6f
+#define LP8860_EEPROM_REG_16 0x70
+#define LP8860_EEPROM_REG_17 0x71
+#define LP8860_EEPROM_REG_18 0x72
+#define LP8860_EEPROM_REG_19 0x73
+#define LP8860_EEPROM_REG_20 0x74
+#define LP8860_EEPROM_REG_21 0x75
+#define LP8860_EEPROM_REG_22 0x76
+#define LP8860_EEPROM_REG_23 0x77
+#define LP8860_EEPROM_REG_24 0x78
+
+#define LP8860_LOCK_EEPROM 0x00
+#define LP8860_UNLOCK_EEPROM 0x01
+#define LP8860_PROGRAM_EEPROM 0x02
+#define LP8860_EEPROM_CODE_1 0x08
+#define LP8860_EEPROM_CODE_2 0xba
+#define LP8860_EEPROM_CODE_3 0xef
+
+#define LP8860_CLEAR_FAULTS 0x01
+
+#define LP8860_NAME "lp8860"
+
+/**
+ * struct lp8860_led
+ * @lock: Lock for reading/writing the device
+ * @client: Pointer to the I2C client
+ * @led_dev: led class device pointer
+ * @regmap: Devices register map
+ * @eeprom_regmap: EEPROM register map
+ * @enable_gpio: VDDIO/EN gpio to enable communication interface
+ * @regulator: LED supply regulator pointer
+ */
+struct lp8860_led {
+ struct mutex lock;
+ struct i2c_client *client;
+ struct led_classdev led_dev;
+ struct regmap *regmap;
+ struct regmap *eeprom_regmap;
+ struct gpio_desc *enable_gpio;
+ struct regulator *regulator;
+};
+
+struct lp8860_eeprom_reg {
+ uint8_t reg;
+ uint8_t value;
+};
+
+static struct lp8860_eeprom_reg lp8860_eeprom_disp_regs[] = {
+ { LP8860_EEPROM_REG_0, 0xed },
+ { LP8860_EEPROM_REG_1, 0xdf },
+ { LP8860_EEPROM_REG_2, 0xdc },
+ { LP8860_EEPROM_REG_3, 0xf0 },
+ { LP8860_EEPROM_REG_4, 0xdf },
+ { LP8860_EEPROM_REG_5, 0xe5 },
+ { LP8860_EEPROM_REG_6, 0xf2 },
+ { LP8860_EEPROM_REG_7, 0x77 },
+ { LP8860_EEPROM_REG_8, 0x77 },
+ { LP8860_EEPROM_REG_9, 0x71 },
+ { LP8860_EEPROM_REG_10, 0x3f },
+ { LP8860_EEPROM_REG_11, 0xb7 },
+ { LP8860_EEPROM_REG_12, 0x17 },
+ { LP8860_EEPROM_REG_13, 0xef },
+ { LP8860_EEPROM_REG_14, 0xb0 },
+ { LP8860_EEPROM_REG_15, 0x87 },
+ { LP8860_EEPROM_REG_16, 0xce },
+ { LP8860_EEPROM_REG_17, 0x72 },
+ { LP8860_EEPROM_REG_18, 0xe5 },
+ { LP8860_EEPROM_REG_19, 0xdf },
+ { LP8860_EEPROM_REG_20, 0x35 },
+ { LP8860_EEPROM_REG_21, 0x06 },
+ { LP8860_EEPROM_REG_22, 0xdc },
+ { LP8860_EEPROM_REG_23, 0x88 },
+ { LP8860_EEPROM_REG_24, 0x3E },
+};
+
+static int lp8860_unlock_eeprom(struct lp8860_led *led, int lock)
+{
+ int ret;
+
+ mutex_lock(&led->lock);
+
+ if (lock == LP8860_UNLOCK_EEPROM) {
+ ret = regmap_write(led->regmap,
+ LP8860_EEPROM_UNLOCK,
+ LP8860_EEPROM_CODE_1);
+ if (ret) {
+ dev_err(&led->client->dev, "EEPROM Unlock failed\n");
+ goto out;
+ }
+
+ ret = regmap_write(led->regmap,
+ LP8860_EEPROM_UNLOCK,
+ LP8860_EEPROM_CODE_2);
+ if (ret) {
+ dev_err(&led->client->dev, "EEPROM Unlock failed\n");
+ goto out;
+ }
+ ret = regmap_write(led->regmap,
+ LP8860_EEPROM_UNLOCK,
+ LP8860_EEPROM_CODE_3);
+ if (ret) {
+ dev_err(&led->client->dev, "EEPROM Unlock failed\n");
+ goto out;
+ }
+ } else {
+ ret = regmap_write(led->regmap,
+ LP8860_EEPROM_UNLOCK,
+ LP8860_LOCK_EEPROM);
+ }
+
+out:
+ mutex_unlock(&led->lock);
+ return ret;
+}
+
+static int lp8860_fault_check(struct lp8860_led *led)
+{
+ int ret, fault;
+ unsigned int read_buf;
+
+ ret = regmap_read(led->regmap, LP8860_LED_FAULT, &read_buf);
+ if (ret)
+ goto out;
+
+ fault = read_buf;
+
+ ret = regmap_read(led->regmap, LP8860_FAULT, &read_buf);
+ if (ret)
+ goto out;
+
+ fault |= read_buf;
+
+ /* Attempt to clear any faults */
+ if (fault)
+ ret = regmap_write(led->regmap, LP8860_FAULT_CLEAR,
+ LP8860_CLEAR_FAULTS);
+out:
+ return ret;
+}
+
+static int lp8860_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brt_val)
+{
+ struct lp8860_led *led =
+ container_of(led_cdev, struct lp8860_led, led_dev);
+ int disp_brightness = brt_val * 255;
+ int ret;
+
+ mutex_lock(&led->lock);
+
+ ret = lp8860_fault_check(led);
+ if (ret) {
+ dev_err(&led->client->dev, "Cannot read/clear faults\n");
+ goto out;
+ }
+
+ ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_MSB,
+ (disp_brightness & 0xff00) >> 8);
+ if (ret) {
+ dev_err(&led->client->dev, "Cannot write CL1 MSB\n");
+ goto out;
+ }
+
+ ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_LSB,
+ disp_brightness & 0xff);
+ if (ret) {
+ dev_err(&led->client->dev, "Cannot write CL1 LSB\n");
+ goto out;
+ }
+out:
+ mutex_unlock(&led->lock);
+ return ret;
+}
+
+static int lp8860_init(struct lp8860_led *led)
+{
+ unsigned int read_buf;
+ int ret, i, reg_count;
+
+ if (led->regulator) {
+ ret = regulator_enable(led->regulator);
+ if (ret) {
+ dev_err(&led->client->dev,
+ "Failed to enable regulator\n");
+ return ret;
+ }
+ }
+
+ if (led->enable_gpio)
+ gpiod_direction_output(led->enable_gpio, 1);
+
+ ret = lp8860_fault_check(led);
+ if (ret)
+ goto out;
+
+ ret = regmap_read(led->regmap, LP8860_STATUS, &read_buf);
+ if (ret)
+ goto out;
+
+ ret = lp8860_unlock_eeprom(led, LP8860_UNLOCK_EEPROM);
+ if (ret) {
+ dev_err(&led->client->dev, "Failed unlocking EEPROM\n");
+ goto out;
+ }
+
+ reg_count = ARRAY_SIZE(lp8860_eeprom_disp_regs) / sizeof(lp8860_eeprom_disp_regs[0]);
+ for (i = 0; i < reg_count; i++) {
+ ret = regmap_write(led->eeprom_regmap,
+ lp8860_eeprom_disp_regs[i].reg,
+ lp8860_eeprom_disp_regs[i].value);
+ if (ret) {
+ dev_err(&led->client->dev, "Failed writing EEPROM\n");
+ goto out;
+ }
+ }
+
+ ret = lp8860_unlock_eeprom(led, LP8860_LOCK_EEPROM);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(led->regmap,
+ LP8860_EEPROM_CNTRL,
+ LP8860_PROGRAM_EEPROM);
+ if (ret) {
+ dev_err(&led->client->dev, "Failed programming EEPROM\n");
+ goto out;
+ }
+
+ return ret;
+
+out:
+ if (ret)
+ if (led->enable_gpio)
+ gpiod_direction_output(led->enable_gpio, 0);
+
+ if (led->regulator) {
+ ret = regulator_disable(led->regulator);
+ if (ret)
+ dev_err(&led->client->dev,
+ "Failed to disable regulator\n");
+ }
+
+ return ret;
+}
+
+static const struct reg_default lp8860_reg_defs[] = {
+ { LP8860_DISP_CL1_BRT_MSB, 0x00},
+ { LP8860_DISP_CL1_BRT_LSB, 0x00},
+ { LP8860_DISP_CL1_CURR_MSB, 0x00},
+ { LP8860_DISP_CL1_CURR_LSB, 0x00},
+ { LP8860_CL2_BRT_MSB, 0x00},
+ { LP8860_CL2_BRT_LSB, 0x00},
+ { LP8860_CL2_CURRENT, 0x00},
+ { LP8860_CL3_BRT_MSB, 0x00},
+ { LP8860_CL3_BRT_LSB, 0x00},
+ { LP8860_CL3_CURRENT, 0x00},
+ { LP8860_CL4_BRT_MSB, 0x00},
+ { LP8860_CL4_BRT_LSB, 0x00},
+ { LP8860_CL4_CURRENT, 0x00},
+ { LP8860_CONFIG, 0x00},
+ { LP8860_FAULT_CLEAR, 0x00},
+ { LP8860_EEPROM_CNTRL, 0x80},
+ { LP8860_EEPROM_UNLOCK, 0x00},
+};
+
+static const struct regmap_config lp8860_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LP8860_EEPROM_UNLOCK,
+ .reg_defaults = lp8860_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(lp8860_reg_defs),
+ .cache_type = REGCACHE_NONE,
+};
+
+static const struct reg_default lp8860_eeprom_defs[] = {
+ { LP8860_EEPROM_REG_0, 0x00 },
+ { LP8860_EEPROM_REG_1, 0x00 },
+ { LP8860_EEPROM_REG_2, 0x00 },
+ { LP8860_EEPROM_REG_3, 0x00 },
+ { LP8860_EEPROM_REG_4, 0x00 },
+ { LP8860_EEPROM_REG_5, 0x00 },
+ { LP8860_EEPROM_REG_6, 0x00 },
+ { LP8860_EEPROM_REG_7, 0x00 },
+ { LP8860_EEPROM_REG_8, 0x00 },
+ { LP8860_EEPROM_REG_9, 0x00 },
+ { LP8860_EEPROM_REG_10, 0x00 },
+ { LP8860_EEPROM_REG_11, 0x00 },
+ { LP8860_EEPROM_REG_12, 0x00 },
+ { LP8860_EEPROM_REG_13, 0x00 },
+ { LP8860_EEPROM_REG_14, 0x00 },
+ { LP8860_EEPROM_REG_15, 0x00 },
+ { LP8860_EEPROM_REG_16, 0x00 },
+ { LP8860_EEPROM_REG_17, 0x00 },
+ { LP8860_EEPROM_REG_18, 0x00 },
+ { LP8860_EEPROM_REG_19, 0x00 },
+ { LP8860_EEPROM_REG_20, 0x00 },
+ { LP8860_EEPROM_REG_21, 0x00 },
+ { LP8860_EEPROM_REG_22, 0x00 },
+ { LP8860_EEPROM_REG_23, 0x00 },
+ { LP8860_EEPROM_REG_24, 0x00 },
+};
+
+static const struct regmap_config lp8860_eeprom_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LP8860_EEPROM_REG_24,
+ .reg_defaults = lp8860_eeprom_defs,
+ .num_reg_defaults = ARRAY_SIZE(lp8860_eeprom_defs),
+ .cache_type = REGCACHE_NONE,
+};
+
+static int lp8860_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct lp8860_led *led;
+ struct device_node *np = dev_of_node(&client->dev);
+ struct device_node *child_node;
+ struct led_init_data init_data = {};
+
+ led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ child_node = of_get_next_available_child(np, NULL);
+ if (!child_node)
+ return -EINVAL;
+
+ led->enable_gpio = devm_gpiod_get_optional(&client->dev,
+ "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(led->enable_gpio)) {
+ ret = PTR_ERR(led->enable_gpio);
+ dev_err(&client->dev, "Failed to get enable gpio: %d\n", ret);
+ return ret;
+ }
+
+ led->regulator = devm_regulator_get(&client->dev, "vled");
+ if (IS_ERR(led->regulator))
+ led->regulator = NULL;
+
+ led->client = client;
+ led->led_dev.brightness_set_blocking = lp8860_brightness_set;
+
+ mutex_init(&led->lock);
+
+ i2c_set_clientdata(client, led);
+
+ led->regmap = devm_regmap_init_i2c(client, &lp8860_regmap_config);
+ if (IS_ERR(led->regmap)) {
+ ret = PTR_ERR(led->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ led->eeprom_regmap = devm_regmap_init_i2c(client, &lp8860_eeprom_regmap_config);
+ if (IS_ERR(led->eeprom_regmap)) {
+ ret = PTR_ERR(led->eeprom_regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = lp8860_init(led);
+ if (ret)
+ return ret;
+
+ init_data.fwnode = of_fwnode_handle(child_node);
+ init_data.devicename = LP8860_NAME;
+ init_data.default_label = ":display_cluster";
+
+ ret = devm_led_classdev_register_ext(&client->dev, &led->led_dev,
+ &init_data);
+ if (ret) {
+ dev_err(&client->dev, "led register err: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void lp8860_remove(struct i2c_client *client)
+{
+ struct lp8860_led *led = i2c_get_clientdata(client);
+ int ret;
+
+ if (led->enable_gpio)
+ gpiod_direction_output(led->enable_gpio, 0);
+
+ if (led->regulator) {
+ ret = regulator_disable(led->regulator);
+ if (ret)
+ dev_err(&led->client->dev,
+ "Failed to disable regulator\n");
+ }
+
+ mutex_destroy(&led->lock);
+}
+
+static const struct i2c_device_id lp8860_id[] = {
+ { "lp8860", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lp8860_id);
+
+static const struct of_device_id of_lp8860_leds_match[] = {
+ { .compatible = "ti,lp8860", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_lp8860_leds_match);
+
+static struct i2c_driver lp8860_driver = {
+ .driver = {
+ .name = "lp8860",
+ .of_match_table = of_lp8860_leds_match,
+ },
+ .probe = lp8860_probe,
+ .remove = lp8860_remove,
+ .id_table = lp8860_id,
+};
+module_i2c_driver(lp8860_driver);
+
+MODULE_DESCRIPTION("Texas Instruments LP8860 LED driver");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lt3593.c b/drivers/leds/leds-lt3593.c
new file mode 100644
index 000000000..d0160fde0
--- /dev/null
+++ b/drivers/leds/leds-lt3593.c
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2009,2018 Daniel Mack <daniel@zonque.org>
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/slab.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/property.h>
+
+#define LED_LT3593_NAME "lt3593"
+
+struct lt3593_led_data {
+ struct led_classdev cdev;
+ struct gpio_desc *gpiod;
+};
+
+static int lt3593_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct lt3593_led_data *led_dat =
+ container_of(led_cdev, struct lt3593_led_data, cdev);
+ int pulses;
+
+ /*
+ * The LT3593 resets its internal current level register to the maximum
+ * level on the first falling edge on the control pin. Each following
+ * falling edge decreases the current level by 625uA. Up to 32 pulses
+ * can be sent, so the maximum power reduction is 20mA.
+ * After a timeout of 128us, the value is taken from the register and
+ * applied is to the output driver.
+ */
+
+ if (value == 0) {
+ gpiod_set_value_cansleep(led_dat->gpiod, 0);
+ return 0;
+ }
+
+ pulses = 32 - (value * 32) / 255;
+
+ if (pulses == 0) {
+ gpiod_set_value_cansleep(led_dat->gpiod, 0);
+ mdelay(1);
+ gpiod_set_value_cansleep(led_dat->gpiod, 1);
+ return 0;
+ }
+
+ gpiod_set_value_cansleep(led_dat->gpiod, 1);
+
+ while (pulses--) {
+ gpiod_set_value_cansleep(led_dat->gpiod, 0);
+ udelay(1);
+ gpiod_set_value_cansleep(led_dat->gpiod, 1);
+ udelay(1);
+ }
+
+ return 0;
+}
+
+static int lt3593_led_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct lt3593_led_data *led_data;
+ struct fwnode_handle *child;
+ int ret, state = LEDS_GPIO_DEFSTATE_OFF;
+ struct led_init_data init_data = {};
+ const char *tmp;
+
+ led_data = devm_kzalloc(dev, sizeof(*led_data), GFP_KERNEL);
+ if (!led_data)
+ return -ENOMEM;
+
+ if (device_get_child_node_count(dev) != 1) {
+ dev_err(dev, "Device must have exactly one LED sub-node.");
+ return -EINVAL;
+ }
+
+ led_data->gpiod = devm_gpiod_get(dev, "lltc,ctrl", 0);
+ if (IS_ERR(led_data->gpiod))
+ return PTR_ERR(led_data->gpiod);
+
+ child = device_get_next_child_node(dev, NULL);
+
+ if (!fwnode_property_read_string(child, "default-state", &tmp)) {
+ if (!strcmp(tmp, "on"))
+ state = LEDS_GPIO_DEFSTATE_ON;
+ }
+
+ led_data->cdev.brightness_set_blocking = lt3593_led_set;
+ led_data->cdev.brightness = state ? LED_FULL : LED_OFF;
+
+ init_data.fwnode = child;
+ init_data.devicename = LED_LT3593_NAME;
+ init_data.default_label = ":";
+
+ ret = devm_led_classdev_register_ext(dev, &led_data->cdev, &init_data);
+ fwnode_handle_put(child);
+ if (ret < 0)
+ return ret;
+
+ platform_set_drvdata(pdev, led_data);
+
+ return 0;
+}
+
+static const struct of_device_id of_lt3593_leds_match[] = {
+ { .compatible = "lltc,lt3593", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_lt3593_leds_match);
+
+static struct platform_driver lt3593_led_driver = {
+ .probe = lt3593_led_probe,
+ .driver = {
+ .name = "leds-lt3593",
+ .of_match_table = of_lt3593_leds_match,
+ },
+};
+
+module_platform_driver(lt3593_led_driver);
+
+MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>");
+MODULE_DESCRIPTION("LED driver for LT3593 controllers");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:leds-lt3593");
diff --git a/drivers/leds/leds-max77650.c b/drivers/leds/leds-max77650.c
new file mode 100644
index 000000000..1eeac56b0
--- /dev/null
+++ b/drivers/leds/leds-max77650.c
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2018 BayLibre SAS
+// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+//
+// LED driver for MAXIM 77650/77651 charger/power-supply.
+
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/mfd/max77650.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define MAX77650_LED_NUM_LEDS 3
+
+#define MAX77650_LED_A_BASE 0x40
+#define MAX77650_LED_B_BASE 0x43
+
+#define MAX77650_LED_BR_MASK GENMASK(4, 0)
+#define MAX77650_LED_EN_MASK GENMASK(7, 6)
+
+#define MAX77650_LED_MAX_BRIGHTNESS MAX77650_LED_BR_MASK
+
+/* Enable EN_LED_MSTR. */
+#define MAX77650_LED_TOP_DEFAULT BIT(0)
+
+#define MAX77650_LED_ENABLE GENMASK(7, 6)
+#define MAX77650_LED_DISABLE 0x00
+
+#define MAX77650_LED_A_DEFAULT MAX77650_LED_DISABLE
+/* 100% on duty */
+#define MAX77650_LED_B_DEFAULT GENMASK(3, 0)
+
+struct max77650_led {
+ struct led_classdev cdev;
+ struct regmap *map;
+ unsigned int regA;
+ unsigned int regB;
+};
+
+static struct max77650_led *max77650_to_led(struct led_classdev *cdev)
+{
+ return container_of(cdev, struct max77650_led, cdev);
+}
+
+static int max77650_led_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct max77650_led *led = max77650_to_led(cdev);
+ int val, mask;
+
+ mask = MAX77650_LED_BR_MASK | MAX77650_LED_EN_MASK;
+
+ if (brightness == LED_OFF)
+ val = MAX77650_LED_DISABLE;
+ else
+ val = MAX77650_LED_ENABLE | brightness;
+
+ return regmap_update_bits(led->map, led->regA, mask, val);
+}
+
+static int max77650_led_probe(struct platform_device *pdev)
+{
+ struct fwnode_handle *child;
+ struct max77650_led *leds, *led;
+ struct device *dev;
+ struct regmap *map;
+ int rv, num_leds;
+ u32 reg;
+
+ dev = &pdev->dev;
+
+ leds = devm_kcalloc(dev, sizeof(*leds),
+ MAX77650_LED_NUM_LEDS, GFP_KERNEL);
+ if (!leds)
+ return -ENOMEM;
+
+ map = dev_get_regmap(dev->parent, NULL);
+ if (!map)
+ return -ENODEV;
+
+ num_leds = device_get_child_node_count(dev);
+ if (!num_leds || num_leds > MAX77650_LED_NUM_LEDS)
+ return -ENODEV;
+
+ device_for_each_child_node(dev, child) {
+ struct led_init_data init_data = {};
+
+ rv = fwnode_property_read_u32(child, "reg", &reg);
+ if (rv || reg >= MAX77650_LED_NUM_LEDS) {
+ rv = -EINVAL;
+ goto err_node_put;
+ }
+
+ led = &leds[reg];
+ led->map = map;
+ led->regA = MAX77650_LED_A_BASE + reg;
+ led->regB = MAX77650_LED_B_BASE + reg;
+ led->cdev.brightness_set_blocking = max77650_led_brightness_set;
+ led->cdev.max_brightness = MAX77650_LED_MAX_BRIGHTNESS;
+
+ init_data.fwnode = child;
+ init_data.devicename = "max77650";
+ /* for backwards compatibility if `label` is not present */
+ init_data.default_label = ":";
+
+ rv = devm_led_classdev_register_ext(dev, &led->cdev,
+ &init_data);
+ if (rv)
+ goto err_node_put;
+
+ rv = regmap_write(map, led->regA, MAX77650_LED_A_DEFAULT);
+ if (rv)
+ goto err_node_put;
+
+ rv = regmap_write(map, led->regB, MAX77650_LED_B_DEFAULT);
+ if (rv)
+ goto err_node_put;
+ }
+
+ return regmap_write(map,
+ MAX77650_REG_CNFG_LED_TOP,
+ MAX77650_LED_TOP_DEFAULT);
+err_node_put:
+ fwnode_handle_put(child);
+ return rv;
+}
+
+static const struct of_device_id max77650_led_of_match[] = {
+ { .compatible = "maxim,max77650-led" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, max77650_led_of_match);
+
+static struct platform_driver max77650_led_driver = {
+ .driver = {
+ .name = "max77650-led",
+ .of_match_table = max77650_led_of_match,
+ },
+ .probe = max77650_led_probe,
+};
+module_platform_driver(max77650_led_driver);
+
+MODULE_DESCRIPTION("MAXIM 77650/77651 LED driver");
+MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:max77650-led");
diff --git a/drivers/leds/leds-max8997.c b/drivers/leds/leds-max8997.c
new file mode 100644
index 000000000..c0bddb338
--- /dev/null
+++ b/drivers/leds/leds-max8997.c
@@ -0,0 +1,299 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * leds-max8997.c - LED class driver for MAX8997 LEDs.
+ *
+ * Copyright (C) 2011 Samsung Electronics
+ * Donggeun Kim <dg77.kim@samsung.com>
+ */
+
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+#include <linux/mfd/max8997.h>
+#include <linux/mfd/max8997-private.h>
+#include <linux/platform_device.h>
+
+#define MAX8997_LED_FLASH_SHIFT 3
+#define MAX8997_LED_FLASH_CUR_MASK 0xf8
+#define MAX8997_LED_MOVIE_SHIFT 4
+#define MAX8997_LED_MOVIE_CUR_MASK 0xf0
+
+#define MAX8997_LED_FLASH_MAX_BRIGHTNESS 0x1f
+#define MAX8997_LED_MOVIE_MAX_BRIGHTNESS 0xf
+#define MAX8997_LED_NONE_MAX_BRIGHTNESS 0
+
+#define MAX8997_LED0_FLASH_MASK 0x1
+#define MAX8997_LED0_FLASH_PIN_MASK 0x5
+#define MAX8997_LED0_MOVIE_MASK 0x8
+#define MAX8997_LED0_MOVIE_PIN_MASK 0x28
+
+#define MAX8997_LED1_FLASH_MASK 0x2
+#define MAX8997_LED1_FLASH_PIN_MASK 0x6
+#define MAX8997_LED1_MOVIE_MASK 0x10
+#define MAX8997_LED1_MOVIE_PIN_MASK 0x30
+
+#define MAX8997_LED_BOOST_ENABLE_MASK (1 << 6)
+
+struct max8997_led {
+ struct max8997_dev *iodev;
+ struct led_classdev cdev;
+ bool enabled;
+ int id;
+ enum max8997_led_mode led_mode;
+ struct mutex mutex;
+};
+
+static void max8997_led_set_mode(struct max8997_led *led,
+ enum max8997_led_mode mode)
+{
+ int ret;
+ struct i2c_client *client = led->iodev->i2c;
+ u8 mask = 0, val;
+
+ switch (mode) {
+ case MAX8997_FLASH_MODE:
+ mask = MAX8997_LED1_FLASH_MASK | MAX8997_LED0_FLASH_MASK;
+ val = led->id ?
+ MAX8997_LED1_FLASH_MASK : MAX8997_LED0_FLASH_MASK;
+ led->cdev.max_brightness = MAX8997_LED_FLASH_MAX_BRIGHTNESS;
+ break;
+ case MAX8997_MOVIE_MODE:
+ mask = MAX8997_LED1_MOVIE_MASK | MAX8997_LED0_MOVIE_MASK;
+ val = led->id ?
+ MAX8997_LED1_MOVIE_MASK : MAX8997_LED0_MOVIE_MASK;
+ led->cdev.max_brightness = MAX8997_LED_MOVIE_MAX_BRIGHTNESS;
+ break;
+ case MAX8997_FLASH_PIN_CONTROL_MODE:
+ mask = MAX8997_LED1_FLASH_PIN_MASK |
+ MAX8997_LED0_FLASH_PIN_MASK;
+ val = led->id ?
+ MAX8997_LED1_FLASH_PIN_MASK : MAX8997_LED0_FLASH_PIN_MASK;
+ led->cdev.max_brightness = MAX8997_LED_FLASH_MAX_BRIGHTNESS;
+ break;
+ case MAX8997_MOVIE_PIN_CONTROL_MODE:
+ mask = MAX8997_LED1_MOVIE_PIN_MASK |
+ MAX8997_LED0_MOVIE_PIN_MASK;
+ val = led->id ?
+ MAX8997_LED1_MOVIE_PIN_MASK : MAX8997_LED0_MOVIE_PIN_MASK;
+ led->cdev.max_brightness = MAX8997_LED_MOVIE_MAX_BRIGHTNESS;
+ break;
+ default:
+ led->cdev.max_brightness = MAX8997_LED_NONE_MAX_BRIGHTNESS;
+ break;
+ }
+
+ if (mask) {
+ ret = max8997_update_reg(client, MAX8997_REG_LEN_CNTL, val,
+ mask);
+ if (ret)
+ dev_err(led->iodev->dev,
+ "failed to update register(%d)\n", ret);
+ }
+
+ led->led_mode = mode;
+}
+
+static void max8997_led_enable(struct max8997_led *led, bool enable)
+{
+ int ret;
+ struct i2c_client *client = led->iodev->i2c;
+ u8 val = 0, mask = MAX8997_LED_BOOST_ENABLE_MASK;
+
+ if (led->enabled == enable)
+ return;
+
+ val = enable ? MAX8997_LED_BOOST_ENABLE_MASK : 0;
+
+ ret = max8997_update_reg(client, MAX8997_REG_BOOST_CNTL, val, mask);
+ if (ret)
+ dev_err(led->iodev->dev,
+ "failed to update register(%d)\n", ret);
+
+ led->enabled = enable;
+}
+
+static void max8997_led_set_current(struct max8997_led *led,
+ enum led_brightness value)
+{
+ int ret;
+ struct i2c_client *client = led->iodev->i2c;
+ u8 val = 0, mask = 0, reg = 0;
+
+ switch (led->led_mode) {
+ case MAX8997_FLASH_MODE:
+ case MAX8997_FLASH_PIN_CONTROL_MODE:
+ val = value << MAX8997_LED_FLASH_SHIFT;
+ mask = MAX8997_LED_FLASH_CUR_MASK;
+ reg = led->id ? MAX8997_REG_FLASH2_CUR : MAX8997_REG_FLASH1_CUR;
+ break;
+ case MAX8997_MOVIE_MODE:
+ case MAX8997_MOVIE_PIN_CONTROL_MODE:
+ val = value << MAX8997_LED_MOVIE_SHIFT;
+ mask = MAX8997_LED_MOVIE_CUR_MASK;
+ reg = MAX8997_REG_MOVIE_CUR;
+ break;
+ default:
+ break;
+ }
+
+ if (mask) {
+ ret = max8997_update_reg(client, reg, val, mask);
+ if (ret)
+ dev_err(led->iodev->dev,
+ "failed to update register(%d)\n", ret);
+ }
+}
+
+static void max8997_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct max8997_led *led =
+ container_of(led_cdev, struct max8997_led, cdev);
+
+ if (value) {
+ max8997_led_set_current(led, value);
+ max8997_led_enable(led, true);
+ } else {
+ max8997_led_set_current(led, value);
+ max8997_led_enable(led, false);
+ }
+}
+
+static ssize_t mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct max8997_led *led =
+ container_of(led_cdev, struct max8997_led, cdev);
+ ssize_t ret = 0;
+
+ mutex_lock(&led->mutex);
+
+ switch (led->led_mode) {
+ case MAX8997_FLASH_MODE:
+ ret += sprintf(buf, "FLASH\n");
+ break;
+ case MAX8997_MOVIE_MODE:
+ ret += sprintf(buf, "MOVIE\n");
+ break;
+ case MAX8997_FLASH_PIN_CONTROL_MODE:
+ ret += sprintf(buf, "FLASH_PIN_CONTROL\n");
+ break;
+ case MAX8997_MOVIE_PIN_CONTROL_MODE:
+ ret += sprintf(buf, "MOVIE_PIN_CONTROL\n");
+ break;
+ default:
+ ret += sprintf(buf, "NONE\n");
+ break;
+ }
+
+ mutex_unlock(&led->mutex);
+
+ return ret;
+}
+
+static ssize_t mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct max8997_led *led =
+ container_of(led_cdev, struct max8997_led, cdev);
+ enum max8997_led_mode mode;
+
+ mutex_lock(&led->mutex);
+
+ if (!strncmp(buf, "FLASH_PIN_CONTROL", 17))
+ mode = MAX8997_FLASH_PIN_CONTROL_MODE;
+ else if (!strncmp(buf, "MOVIE_PIN_CONTROL", 17))
+ mode = MAX8997_MOVIE_PIN_CONTROL_MODE;
+ else if (!strncmp(buf, "FLASH", 5))
+ mode = MAX8997_FLASH_MODE;
+ else if (!strncmp(buf, "MOVIE", 5))
+ mode = MAX8997_MOVIE_MODE;
+ else
+ mode = MAX8997_NONE;
+
+ max8997_led_set_mode(led, mode);
+
+ mutex_unlock(&led->mutex);
+
+ return size;
+}
+
+static DEVICE_ATTR_RW(mode);
+
+static struct attribute *max8997_attrs[] = {
+ &dev_attr_mode.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(max8997);
+
+static int max8997_led_probe(struct platform_device *pdev)
+{
+ struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
+ struct max8997_led *led;
+ char name[20];
+ int ret = 0;
+
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "no platform data\n");
+ return -ENODEV;
+ }
+
+ led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
+ if (led == NULL)
+ return -ENOMEM;
+
+ led->id = pdev->id;
+ snprintf(name, sizeof(name), "max8997-led%d", pdev->id);
+
+ led->cdev.name = name;
+ led->cdev.brightness_set = max8997_led_brightness_set;
+ led->cdev.flags |= LED_CORE_SUSPENDRESUME;
+ led->cdev.brightness = 0;
+ led->cdev.groups = max8997_groups;
+ led->iodev = iodev;
+
+ /* initialize mode and brightness according to platform_data */
+ if (pdata->led_pdata) {
+ u8 mode = 0, brightness = 0;
+
+ mode = pdata->led_pdata->mode[led->id];
+ brightness = pdata->led_pdata->brightness[led->id];
+
+ max8997_led_set_mode(led, mode);
+
+ if (brightness > led->cdev.max_brightness)
+ brightness = led->cdev.max_brightness;
+ max8997_led_set_current(led, brightness);
+ led->cdev.brightness = brightness;
+ } else {
+ max8997_led_set_mode(led, MAX8997_NONE);
+ max8997_led_set_current(led, 0);
+ }
+
+ mutex_init(&led->mutex);
+
+ ret = devm_led_classdev_register(&pdev->dev, &led->cdev);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static struct platform_driver max8997_led_driver = {
+ .driver = {
+ .name = "max8997-led",
+ },
+ .probe = max8997_led_probe,
+};
+
+module_platform_driver(max8997_led_driver);
+
+MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
+MODULE_DESCRIPTION("MAX8997 LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:max8997-led");
diff --git a/drivers/leds/leds-mc13783.c b/drivers/leds/leds-mc13783.c
new file mode 100644
index 000000000..675502c15
--- /dev/null
+++ b/drivers/leds/leds-mc13783.c
@@ -0,0 +1,315 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LEDs driver for Freescale MC13783/MC13892/MC34708
+ *
+ * Copyright (C) 2010 Philippe Rétornaz
+ *
+ * Based on leds-da903x:
+ * Copyright (C) 2008 Compulab, Ltd.
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ * Eric Miao <eric.miao@marvell.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/of.h>
+#include <linux/mfd/mc13xxx.h>
+
+struct mc13xxx_led_devtype {
+ int led_min;
+ int led_max;
+ int num_regs;
+ u32 ledctrl_base;
+};
+
+struct mc13xxx_led {
+ struct led_classdev cdev;
+ int id;
+ struct mc13xxx_leds *leds;
+};
+
+struct mc13xxx_leds {
+ struct mc13xxx *master;
+ struct mc13xxx_led_devtype *devtype;
+ int num_leds;
+ struct mc13xxx_led *led;
+};
+
+static unsigned int mc13xxx_max_brightness(int id)
+{
+ if (id >= MC13783_LED_MD && id <= MC13783_LED_KP)
+ return 0x0f;
+ else if (id >= MC13783_LED_R1 && id <= MC13783_LED_B3)
+ return 0x1f;
+
+ return 0x3f;
+}
+
+static int mc13xxx_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct mc13xxx_led *led =
+ container_of(led_cdev, struct mc13xxx_led, cdev);
+ struct mc13xxx_leds *leds = led->leds;
+ unsigned int reg, bank, off, shift;
+
+ switch (led->id) {
+ case MC13783_LED_MD:
+ case MC13783_LED_AD:
+ case MC13783_LED_KP:
+ reg = 2;
+ shift = 9 + (led->id - MC13783_LED_MD) * 4;
+ break;
+ case MC13783_LED_R1:
+ case MC13783_LED_G1:
+ case MC13783_LED_B1:
+ case MC13783_LED_R2:
+ case MC13783_LED_G2:
+ case MC13783_LED_B2:
+ case MC13783_LED_R3:
+ case MC13783_LED_G3:
+ case MC13783_LED_B3:
+ off = led->id - MC13783_LED_R1;
+ bank = off / 3;
+ reg = 3 + bank;
+ shift = (off - bank * 3) * 5 + 6;
+ break;
+ case MC13892_LED_MD:
+ case MC13892_LED_AD:
+ case MC13892_LED_KP:
+ off = led->id - MC13892_LED_MD;
+ reg = off / 2;
+ shift = 3 + (off - reg * 2) * 12;
+ break;
+ case MC13892_LED_R:
+ case MC13892_LED_G:
+ case MC13892_LED_B:
+ off = led->id - MC13892_LED_R;
+ bank = off / 2;
+ reg = 2 + bank;
+ shift = (off - bank * 2) * 12 + 3;
+ break;
+ case MC34708_LED_R:
+ case MC34708_LED_G:
+ reg = 0;
+ shift = 3 + (led->id - MC34708_LED_R) * 12;
+ break;
+ default:
+ BUG();
+ }
+
+ return mc13xxx_reg_rmw(leds->master, leds->devtype->ledctrl_base + reg,
+ mc13xxx_max_brightness(led->id) << shift,
+ value << shift);
+}
+
+#ifdef CONFIG_OF
+static struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
+ struct platform_device *pdev)
+{
+ struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
+ struct mc13xxx_leds_platform_data *pdata;
+ struct device_node *parent, *child;
+ struct device *dev = &pdev->dev;
+ int i = 0, ret = -ENODATA;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ parent = of_get_child_by_name(dev_of_node(dev->parent), "leds");
+ if (!parent)
+ goto out_node_put;
+
+ ret = of_property_read_u32_array(parent, "led-control",
+ pdata->led_control,
+ leds->devtype->num_regs);
+ if (ret)
+ goto out_node_put;
+
+ pdata->num_leds = of_get_available_child_count(parent);
+
+ pdata->led = devm_kcalloc(dev, pdata->num_leds, sizeof(*pdata->led),
+ GFP_KERNEL);
+ if (!pdata->led) {
+ ret = -ENOMEM;
+ goto out_node_put;
+ }
+
+ for_each_available_child_of_node(parent, child) {
+ const char *str;
+ u32 tmp;
+
+ if (of_property_read_u32(child, "reg", &tmp))
+ continue;
+ pdata->led[i].id = leds->devtype->led_min + tmp;
+
+ if (!of_property_read_string(child, "label", &str))
+ pdata->led[i].name = str;
+ if (!of_property_read_string(child, "linux,default-trigger",
+ &str))
+ pdata->led[i].default_trigger = str;
+
+ i++;
+ }
+
+ pdata->num_leds = i;
+ ret = i > 0 ? 0 : -ENODATA;
+
+out_node_put:
+ of_node_put(parent);
+
+ return ret ? ERR_PTR(ret) : pdata;
+}
+#else
+static inline struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
+ struct platform_device *pdev)
+{
+ return ERR_PTR(-ENOSYS);
+}
+#endif
+
+static int __init mc13xxx_led_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(dev);
+ struct mc13xxx *mcdev = dev_get_drvdata(dev->parent);
+ struct mc13xxx_led_devtype *devtype =
+ (struct mc13xxx_led_devtype *)pdev->id_entry->driver_data;
+ struct mc13xxx_leds *leds;
+ int i, id, ret = -ENODATA;
+ u32 init_led = 0;
+
+ leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
+ if (!leds)
+ return -ENOMEM;
+
+ leds->devtype = devtype;
+ leds->master = mcdev;
+ platform_set_drvdata(pdev, leds);
+
+ if (dev_of_node(dev->parent)) {
+ pdata = mc13xxx_led_probe_dt(pdev);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ } else if (!pdata)
+ return -ENODATA;
+
+ leds->num_leds = pdata->num_leds;
+
+ if ((leds->num_leds < 1) ||
+ (leds->num_leds > (devtype->led_max - devtype->led_min + 1))) {
+ dev_err(dev, "Invalid LED count %d\n", leds->num_leds);
+ return -EINVAL;
+ }
+
+ leds->led = devm_kcalloc(dev, leds->num_leds, sizeof(*leds->led),
+ GFP_KERNEL);
+ if (!leds->led)
+ return -ENOMEM;
+
+ for (i = 0; i < devtype->num_regs; i++) {
+ ret = mc13xxx_reg_write(mcdev, leds->devtype->ledctrl_base + i,
+ pdata->led_control[i]);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < leds->num_leds; i++) {
+ const char *name, *trig;
+
+ ret = -EINVAL;
+
+ id = pdata->led[i].id;
+ name = pdata->led[i].name;
+ trig = pdata->led[i].default_trigger;
+
+ if ((id > devtype->led_max) || (id < devtype->led_min)) {
+ dev_err(dev, "Invalid ID %i\n", id);
+ break;
+ }
+
+ if (init_led & (1 << id)) {
+ dev_warn(dev, "LED %i already initialized\n", id);
+ break;
+ }
+
+ init_led |= 1 << id;
+ leds->led[i].id = id;
+ leds->led[i].leds = leds;
+ leds->led[i].cdev.name = name;
+ leds->led[i].cdev.default_trigger = trig;
+ leds->led[i].cdev.flags = LED_CORE_SUSPENDRESUME;
+ leds->led[i].cdev.brightness_set_blocking = mc13xxx_led_set;
+ leds->led[i].cdev.max_brightness = mc13xxx_max_brightness(id);
+
+ ret = led_classdev_register(dev->parent, &leds->led[i].cdev);
+ if (ret) {
+ dev_err(dev, "Failed to register LED %i\n", id);
+ break;
+ }
+ }
+
+ if (ret)
+ while (--i >= 0)
+ led_classdev_unregister(&leds->led[i].cdev);
+
+ return ret;
+}
+
+static int mc13xxx_led_remove(struct platform_device *pdev)
+{
+ struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < leds->num_leds; i++)
+ led_classdev_unregister(&leds->led[i].cdev);
+
+ return 0;
+}
+
+static const struct mc13xxx_led_devtype mc13783_led_devtype = {
+ .led_min = MC13783_LED_MD,
+ .led_max = MC13783_LED_B3,
+ .num_regs = 6,
+ .ledctrl_base = 51,
+};
+
+static const struct mc13xxx_led_devtype mc13892_led_devtype = {
+ .led_min = MC13892_LED_MD,
+ .led_max = MC13892_LED_B,
+ .num_regs = 4,
+ .ledctrl_base = 51,
+};
+
+static const struct mc13xxx_led_devtype mc34708_led_devtype = {
+ .led_min = MC34708_LED_R,
+ .led_max = MC34708_LED_G,
+ .num_regs = 1,
+ .ledctrl_base = 54,
+};
+
+static const struct platform_device_id mc13xxx_led_id_table[] = {
+ { "mc13783-led", (kernel_ulong_t)&mc13783_led_devtype, },
+ { "mc13892-led", (kernel_ulong_t)&mc13892_led_devtype, },
+ { "mc34708-led", (kernel_ulong_t)&mc34708_led_devtype, },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, mc13xxx_led_id_table);
+
+static struct platform_driver mc13xxx_led_driver = {
+ .driver = {
+ .name = "mc13xxx-led",
+ },
+ .remove = mc13xxx_led_remove,
+ .id_table = mc13xxx_led_id_table,
+};
+module_platform_driver_probe(mc13xxx_led_driver, mc13xxx_led_probe);
+
+MODULE_DESCRIPTION("LEDs driver for Freescale MC13XXX PMIC");
+MODULE_AUTHOR("Philippe Retornaz <philippe.retornaz@epfl.ch>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-menf21bmc.c b/drivers/leds/leds-menf21bmc.c
new file mode 100644
index 000000000..6b1b47160
--- /dev/null
+++ b/drivers/leds/leds-menf21bmc.c
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * MEN 14F021P00 Board Management Controller (BMC) LEDs Driver.
+ *
+ * This is the core LED driver of the MEN 14F021P00 BMC.
+ * There are four LEDs available which can be switched on and off.
+ * STATUS LED, HOT SWAP LED, USER LED 1, USER LED 2
+ *
+ * Copyright (C) 2014 MEN Mikro Elektronik Nuernberg GmbH
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/i2c.h>
+
+#define BMC_CMD_LED_GET_SET 0xA0
+#define BMC_BIT_LED_STATUS BIT(0)
+#define BMC_BIT_LED_HOTSWAP BIT(1)
+#define BMC_BIT_LED_USER1 BIT(2)
+#define BMC_BIT_LED_USER2 BIT(3)
+
+struct menf21bmc_led {
+ struct led_classdev cdev;
+ u8 led_bit;
+ const char *name;
+ struct i2c_client *i2c_client;
+};
+
+static struct menf21bmc_led leds[] = {
+ {
+ .name = "menf21bmc:led_status",
+ .led_bit = BMC_BIT_LED_STATUS,
+ },
+ {
+ .name = "menf21bmc:led_hotswap",
+ .led_bit = BMC_BIT_LED_HOTSWAP,
+ },
+ {
+ .name = "menf21bmc:led_user1",
+ .led_bit = BMC_BIT_LED_USER1,
+ },
+ {
+ .name = "menf21bmc:led_user2",
+ .led_bit = BMC_BIT_LED_USER2,
+ }
+};
+
+static DEFINE_MUTEX(led_lock);
+
+static void
+menf21bmc_led_set(struct led_classdev *led_cdev, enum led_brightness value)
+{
+ int led_val;
+ struct menf21bmc_led *led = container_of(led_cdev,
+ struct menf21bmc_led, cdev);
+
+ mutex_lock(&led_lock);
+ led_val = i2c_smbus_read_byte_data(led->i2c_client,
+ BMC_CMD_LED_GET_SET);
+ if (led_val < 0)
+ goto err_out;
+
+ if (value == LED_OFF)
+ led_val &= ~led->led_bit;
+ else
+ led_val |= led->led_bit;
+
+ i2c_smbus_write_byte_data(led->i2c_client,
+ BMC_CMD_LED_GET_SET, led_val);
+err_out:
+ mutex_unlock(&led_lock);
+}
+
+static int menf21bmc_led_probe(struct platform_device *pdev)
+{
+ int i;
+ int ret;
+ struct i2c_client *i2c_client = to_i2c_client(pdev->dev.parent);
+
+ for (i = 0; i < ARRAY_SIZE(leds); i++) {
+ leds[i].cdev.name = leds[i].name;
+ leds[i].cdev.brightness_set = menf21bmc_led_set;
+ leds[i].i2c_client = i2c_client;
+ ret = devm_led_classdev_register(&pdev->dev, &leds[i].cdev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to register LED device\n");
+ return ret;
+ }
+ }
+ dev_info(&pdev->dev, "MEN 140F21P00 BMC LED device enabled\n");
+
+ return 0;
+
+}
+
+static struct platform_driver menf21bmc_led = {
+ .probe = menf21bmc_led_probe,
+ .driver = {
+ .name = "menf21bmc_led",
+ },
+};
+
+module_platform_driver(menf21bmc_led);
+
+MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>");
+MODULE_DESCRIPTION("MEN 14F021P00 BMC led driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:menf21bmc_led");
diff --git a/drivers/leds/leds-mlxcpld.c b/drivers/leds/leds-mlxcpld.c
new file mode 100644
index 000000000..1355c84a2
--- /dev/null
+++ b/drivers/leds/leds-mlxcpld.c
@@ -0,0 +1,435 @@
+/*
+ * drivers/leds/leds-mlxcpld.c
+ * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2016 Vadim Pasternak <vadimp@mellanox.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/acpi.h>
+#include <linux/device.h>
+#include <linux/dmi.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/io.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#define MLXPLAT_CPLD_LPC_REG_BASE_ADRR 0x2500 /* LPC bus access */
+
+/* Color codes for LEDs */
+#define MLXCPLD_LED_OFFSET_HALF 0x01 /* Offset from solid: 3Hz blink */
+#define MLXCPLD_LED_OFFSET_FULL 0x02 /* Offset from solid: 6Hz blink */
+#define MLXCPLD_LED_IS_OFF 0x00 /* Off */
+#define MLXCPLD_LED_RED_STATIC_ON 0x05 /* Solid red */
+#define MLXCPLD_LED_RED_BLINK_HALF (MLXCPLD_LED_RED_STATIC_ON + \
+ MLXCPLD_LED_OFFSET_HALF)
+#define MLXCPLD_LED_RED_BLINK_FULL (MLXCPLD_LED_RED_STATIC_ON + \
+ MLXCPLD_LED_OFFSET_FULL)
+#define MLXCPLD_LED_GREEN_STATIC_ON 0x0D /* Solid green */
+#define MLXCPLD_LED_GREEN_BLINK_HALF (MLXCPLD_LED_GREEN_STATIC_ON + \
+ MLXCPLD_LED_OFFSET_HALF)
+#define MLXCPLD_LED_GREEN_BLINK_FULL (MLXCPLD_LED_GREEN_STATIC_ON + \
+ MLXCPLD_LED_OFFSET_FULL)
+#define MLXCPLD_LED_BLINK_3HZ 167 /* ~167 msec off/on */
+#define MLXCPLD_LED_BLINK_6HZ 83 /* ~83 msec off/on */
+
+/**
+ * struct mlxcpld_param - LED access parameters:
+ * @offset: offset for LED access in CPLD device
+ * @mask: mask for LED access in CPLD device
+ * @base_color: base color code for LED
+**/
+struct mlxcpld_param {
+ u8 offset;
+ u8 mask;
+ u8 base_color;
+};
+
+/**
+ * struct mlxcpld_led_priv - LED private data:
+ * @cled: LED class device instance
+ * @param: LED CPLD access parameters
+**/
+struct mlxcpld_led_priv {
+ struct led_classdev cdev;
+ struct mlxcpld_param param;
+};
+
+#define cdev_to_priv(c) container_of(c, struct mlxcpld_led_priv, cdev)
+
+/**
+ * struct mlxcpld_led_profile - system LED profile (defined per system class):
+ * @offset: offset for LED access in CPLD device
+ * @mask: mask for LED access in CPLD device
+ * @base_color: base color code
+ * @brightness: default brightness setting (on/off)
+ * @name: LED name
+**/
+struct mlxcpld_led_profile {
+ u8 offset;
+ u8 mask;
+ u8 base_color;
+ enum led_brightness brightness;
+ const char *name;
+};
+
+/**
+ * struct mlxcpld_led_pdata - system LED private data
+ * @pdev: platform device pointer
+ * @pled: LED class device instance
+ * @profile: system configuration profile
+ * @num_led_instances: number of LED instances
+ * @lock: device access lock
+**/
+struct mlxcpld_led_pdata {
+ struct platform_device *pdev;
+ struct mlxcpld_led_priv *pled;
+ struct mlxcpld_led_profile *profile;
+ int num_led_instances;
+ spinlock_t lock;
+};
+
+static struct mlxcpld_led_pdata *mlxcpld_led;
+
+/* Default profile fit the next Mellanox systems:
+ * "msx6710", "msx6720", "msb7700", "msn2700", "msx1410",
+ * "msn2410", "msb7800", "msn2740"
+ */
+static struct mlxcpld_led_profile mlxcpld_led_default_profile[] = {
+ {
+ 0x21, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
+ "mlxcpld:fan1:green",
+ },
+ {
+ 0x21, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
+ "mlxcpld:fan1:red",
+ },
+ {
+ 0x21, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
+ "mlxcpld:fan2:green",
+ },
+ {
+ 0x21, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
+ "mlxcpld:fan2:red",
+ },
+ {
+ 0x22, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
+ "mlxcpld:fan3:green",
+ },
+ {
+ 0x22, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
+ "mlxcpld:fan3:red",
+ },
+ {
+ 0x22, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
+ "mlxcpld:fan4:green",
+ },
+ {
+ 0x22, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
+ "mlxcpld:fan4:red",
+ },
+ {
+ 0x20, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
+ "mlxcpld:psu:green",
+ },
+ {
+ 0x20, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
+ "mlxcpld:psu:red",
+ },
+ {
+ 0x20, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
+ "mlxcpld:status:green",
+ },
+ {
+ 0x20, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
+ "mlxcpld:status:red",
+ },
+};
+
+/* Profile fit the Mellanox systems based on "msn2100" */
+static struct mlxcpld_led_profile mlxcpld_led_msn2100_profile[] = {
+ {
+ 0x21, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
+ "mlxcpld:fan:green",
+ },
+ {
+ 0x21, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
+ "mlxcpld:fan:red",
+ },
+ {
+ 0x23, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
+ "mlxcpld:psu1:green",
+ },
+ {
+ 0x23, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
+ "mlxcpld:psu1:red",
+ },
+ {
+ 0x23, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
+ "mlxcpld:psu2:green",
+ },
+ {
+ 0x23, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
+ "mlxcpld:psu2:red",
+ },
+ {
+ 0x20, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
+ "mlxcpld:status:green",
+ },
+ {
+ 0x20, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
+ "mlxcpld:status:red",
+ },
+ {
+ 0x24, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, LED_OFF,
+ "mlxcpld:uid:blue",
+ },
+};
+
+enum mlxcpld_led_platform_types {
+ MLXCPLD_LED_PLATFORM_DEFAULT,
+ MLXCPLD_LED_PLATFORM_MSN2100,
+};
+
+static const char *mlx_product_names[] = {
+ "DEFAULT",
+ "MSN2100",
+};
+
+static enum
+mlxcpld_led_platform_types mlxcpld_led_platform_check_sys_type(void)
+{
+ const char *mlx_product_name;
+ int i;
+
+ mlx_product_name = dmi_get_system_info(DMI_PRODUCT_NAME);
+ if (!mlx_product_name)
+ return MLXCPLD_LED_PLATFORM_DEFAULT;
+
+ for (i = 1; i < ARRAY_SIZE(mlx_product_names); i++) {
+ if (strstr(mlx_product_name, mlx_product_names[i]))
+ return i;
+ }
+
+ return MLXCPLD_LED_PLATFORM_DEFAULT;
+}
+
+static void mlxcpld_led_bus_access_func(u16 base, u8 offset, u8 rw_flag,
+ u8 *data)
+{
+ u32 addr = base + offset;
+
+ if (rw_flag == 0)
+ outb(*data, addr);
+ else
+ *data = inb(addr);
+}
+
+static void mlxcpld_led_store_hw(u8 mask, u8 off, u8 vset)
+{
+ u8 nib, val;
+
+ /*
+ * Each LED is controlled through low or high nibble of the relevant
+ * CPLD register. Register offset is specified by off parameter.
+ * Parameter vset provides color code: 0x0 for off, 0x5 for solid red,
+ * 0x6 for 3Hz blink red, 0xd for solid green, 0xe for 3Hz blink
+ * green.
+ * Parameter mask specifies which nibble is used for specific LED: mask
+ * 0xf0 - lower nibble is to be used (bits from 0 to 3), mask 0x0f -
+ * higher nibble (bits from 4 to 7).
+ */
+ spin_lock(&mlxcpld_led->lock);
+ mlxcpld_led_bus_access_func(MLXPLAT_CPLD_LPC_REG_BASE_ADRR, off, 1,
+ &val);
+ nib = (mask == 0xf0) ? vset : (vset << 4);
+ val = (val & mask) | nib;
+ mlxcpld_led_bus_access_func(MLXPLAT_CPLD_LPC_REG_BASE_ADRR, off, 0,
+ &val);
+ spin_unlock(&mlxcpld_led->lock);
+}
+
+static void mlxcpld_led_brightness_set(struct led_classdev *led,
+ enum led_brightness value)
+{
+ struct mlxcpld_led_priv *pled = cdev_to_priv(led);
+
+ if (value) {
+ mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
+ pled->param.base_color);
+ return;
+ }
+
+ mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
+ MLXCPLD_LED_IS_OFF);
+}
+
+static int mlxcpld_led_blink_set(struct led_classdev *led,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct mlxcpld_led_priv *pled = cdev_to_priv(led);
+
+ /*
+ * HW supports two types of blinking: full (6Hz) and half (3Hz).
+ * For delay on/off zero default setting 3Hz is used.
+ */
+ if (!(*delay_on == 0 && *delay_off == 0) &&
+ !(*delay_on == MLXCPLD_LED_BLINK_3HZ &&
+ *delay_off == MLXCPLD_LED_BLINK_3HZ) &&
+ !(*delay_on == MLXCPLD_LED_BLINK_6HZ &&
+ *delay_off == MLXCPLD_LED_BLINK_6HZ))
+ return -EINVAL;
+
+ if (*delay_on == MLXCPLD_LED_BLINK_6HZ)
+ mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
+ pled->param.base_color +
+ MLXCPLD_LED_OFFSET_FULL);
+ else
+ mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
+ pled->param.base_color +
+ MLXCPLD_LED_OFFSET_HALF);
+
+ return 0;
+}
+
+static int mlxcpld_led_config(struct device *dev,
+ struct mlxcpld_led_pdata *cpld)
+{
+ int i;
+ int err;
+
+ cpld->pled = devm_kcalloc(dev,
+ cpld->num_led_instances,
+ sizeof(struct mlxcpld_led_priv),
+ GFP_KERNEL);
+ if (!cpld->pled)
+ return -ENOMEM;
+
+ for (i = 0; i < cpld->num_led_instances; i++) {
+ cpld->pled[i].cdev.name = cpld->profile[i].name;
+ cpld->pled[i].cdev.brightness = cpld->profile[i].brightness;
+ cpld->pled[i].cdev.max_brightness = 1;
+ cpld->pled[i].cdev.brightness_set = mlxcpld_led_brightness_set;
+ cpld->pled[i].cdev.blink_set = mlxcpld_led_blink_set;
+ cpld->pled[i].cdev.flags = LED_CORE_SUSPENDRESUME;
+ err = devm_led_classdev_register(dev, &cpld->pled[i].cdev);
+ if (err)
+ return err;
+
+ cpld->pled[i].param.offset = mlxcpld_led->profile[i].offset;
+ cpld->pled[i].param.mask = mlxcpld_led->profile[i].mask;
+ cpld->pled[i].param.base_color =
+ mlxcpld_led->profile[i].base_color;
+
+ if (mlxcpld_led->profile[i].brightness)
+ mlxcpld_led_brightness_set(&cpld->pled[i].cdev,
+ mlxcpld_led->profile[i].brightness);
+ }
+
+ return 0;
+}
+
+static int __init mlxcpld_led_probe(struct platform_device *pdev)
+{
+ enum mlxcpld_led_platform_types mlxcpld_led_plat =
+ mlxcpld_led_platform_check_sys_type();
+
+ mlxcpld_led = devm_kzalloc(&pdev->dev, sizeof(*mlxcpld_led),
+ GFP_KERNEL);
+ if (!mlxcpld_led)
+ return -ENOMEM;
+
+ mlxcpld_led->pdev = pdev;
+
+ switch (mlxcpld_led_plat) {
+ case MLXCPLD_LED_PLATFORM_MSN2100:
+ mlxcpld_led->profile = mlxcpld_led_msn2100_profile;
+ mlxcpld_led->num_led_instances =
+ ARRAY_SIZE(mlxcpld_led_msn2100_profile);
+ break;
+
+ default:
+ mlxcpld_led->profile = mlxcpld_led_default_profile;
+ mlxcpld_led->num_led_instances =
+ ARRAY_SIZE(mlxcpld_led_default_profile);
+ break;
+ }
+
+ spin_lock_init(&mlxcpld_led->lock);
+
+ return mlxcpld_led_config(&pdev->dev, mlxcpld_led);
+}
+
+static struct platform_driver mlxcpld_led_driver = {
+ .driver = {
+ .name = KBUILD_MODNAME,
+ },
+};
+
+static int __init mlxcpld_led_init(void)
+{
+ struct platform_device *pdev;
+ int err;
+
+ if (!dmi_match(DMI_CHASSIS_VENDOR, "Mellanox Technologies Ltd."))
+ return -ENODEV;
+
+ pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
+ if (IS_ERR(pdev)) {
+ pr_err("Device allocation failed\n");
+ return PTR_ERR(pdev);
+ }
+
+ err = platform_driver_probe(&mlxcpld_led_driver, mlxcpld_led_probe);
+ if (err) {
+ pr_err("Probe platform driver failed\n");
+ platform_device_unregister(pdev);
+ }
+
+ return err;
+}
+
+static void __exit mlxcpld_led_exit(void)
+{
+ platform_device_unregister(mlxcpld_led->pdev);
+ platform_driver_unregister(&mlxcpld_led_driver);
+}
+
+module_init(mlxcpld_led_init);
+module_exit(mlxcpld_led_exit);
+
+MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
+MODULE_DESCRIPTION("Mellanox board LED driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS("platform:leds_mlxcpld");
diff --git a/drivers/leds/leds-mlxreg.c b/drivers/leds/leds-mlxreg.c
new file mode 100644
index 000000000..b7855c93b
--- /dev/null
+++ b/drivers/leds/leds-mlxreg.c
@@ -0,0 +1,301 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+//
+// Copyright (c) 2018 Mellanox Technologies. All rights reserved.
+// Copyright (c) 2018 Vadim Pasternak <vadimp@mellanox.com>
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_data/mlxreg.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+/* Codes for LEDs. */
+#define MLXREG_LED_OFFSET_BLINK_3HZ 0x01 /* Offset from solid: 3Hz blink */
+#define MLXREG_LED_OFFSET_BLINK_6HZ 0x02 /* Offset from solid: 6Hz blink */
+#define MLXREG_LED_IS_OFF 0x00 /* Off */
+#define MLXREG_LED_RED_SOLID 0x05 /* Solid red */
+#define MLXREG_LED_GREEN_SOLID 0x0D /* Solid green */
+#define MLXREG_LED_AMBER_SOLID 0x09 /* Solid amber */
+#define MLXREG_LED_BLINK_3HZ 167 /* ~167 msec off/on - HW support */
+#define MLXREG_LED_BLINK_6HZ 83 /* ~83 msec off/on - HW support */
+#define MLXREG_LED_CAPABILITY_CLEAR GENMASK(31, 8) /* Clear mask */
+
+/**
+ * struct mlxreg_led_data - led control data:
+ *
+ * @data: led configuration data;
+ * @led_cdev: led class data;
+ * @base_color: base led color (other colors have constant offset from base);
+ * @led_data: led data;
+ * @data_parent: pointer to private device control data of parent;
+ * @led_cdev_name: class device name
+ */
+struct mlxreg_led_data {
+ struct mlxreg_core_data *data;
+ struct led_classdev led_cdev;
+ u8 base_color;
+ void *data_parent;
+ char led_cdev_name[MLXREG_CORE_LABEL_MAX_SIZE];
+};
+
+#define cdev_to_priv(c) container_of(c, struct mlxreg_led_data, led_cdev)
+
+/**
+ * struct mlxreg_led_priv_data - platform private data:
+ *
+ * @pdev: platform device;
+ * @pdata: platform data;
+ * @access_lock: mutex for attribute IO access;
+ */
+struct mlxreg_led_priv_data {
+ struct platform_device *pdev;
+ struct mlxreg_core_platform_data *pdata;
+ struct mutex access_lock; /* protect IO operations */
+};
+
+static int
+mlxreg_led_store_hw(struct mlxreg_led_data *led_data, u8 vset)
+{
+ struct mlxreg_led_priv_data *priv = led_data->data_parent;
+ struct mlxreg_core_platform_data *led_pdata = priv->pdata;
+ struct mlxreg_core_data *data = led_data->data;
+ u32 regval;
+ u32 nib;
+ int ret;
+
+ /*
+ * Each LED is controlled through low or high nibble of the relevant
+ * register byte. Register offset is specified by off parameter.
+ * Parameter vset provides color code: 0x0 for off, 0x5 for solid red,
+ * 0x6 for 3Hz blink red, 0xd for solid green, 0xe for 3Hz blink
+ * green.
+ * Parameter mask specifies which nibble is used for specific LED: mask
+ * 0xf0 - lower nibble is to be used (bits from 0 to 3), mask 0x0f -
+ * higher nibble (bits from 4 to 7).
+ */
+ mutex_lock(&priv->access_lock);
+
+ ret = regmap_read(led_pdata->regmap, data->reg, &regval);
+ if (ret)
+ goto access_error;
+
+ nib = (ror32(data->mask, data->bit) == 0xf0) ? rol32(vset, data->bit) :
+ rol32(vset, data->bit + 4);
+ regval = (regval & data->mask) | nib;
+
+ ret = regmap_write(led_pdata->regmap, data->reg, regval);
+
+access_error:
+ mutex_unlock(&priv->access_lock);
+
+ return ret;
+}
+
+static enum led_brightness
+mlxreg_led_get_hw(struct mlxreg_led_data *led_data)
+{
+ struct mlxreg_led_priv_data *priv = led_data->data_parent;
+ struct mlxreg_core_platform_data *led_pdata = priv->pdata;
+ struct mlxreg_core_data *data = led_data->data;
+ u32 regval;
+ int err;
+
+ /*
+ * Each LED is controlled through low or high nibble of the relevant
+ * register byte. Register offset is specified by off parameter.
+ * Parameter vset provides color code: 0x0 for off, 0x5 for solid red,
+ * 0x6 for 3Hz blink red, 0xd for solid green, 0xe for 3Hz blink
+ * green.
+ * Parameter mask specifies which nibble is used for specific LED: mask
+ * 0xf0 - lower nibble is to be used (bits from 0 to 3), mask 0x0f -
+ * higher nibble (bits from 4 to 7).
+ */
+ err = regmap_read(led_pdata->regmap, data->reg, &regval);
+ if (err < 0) {
+ dev_warn(led_data->led_cdev.dev, "Failed to get current brightness, error: %d\n",
+ err);
+ /* Assume the LED is OFF */
+ return LED_OFF;
+ }
+
+ regval = regval & ~data->mask;
+ regval = (ror32(data->mask, data->bit) == 0xf0) ? ror32(regval,
+ data->bit) : ror32(regval, data->bit + 4);
+ if (regval >= led_data->base_color &&
+ regval <= (led_data->base_color + MLXREG_LED_OFFSET_BLINK_6HZ))
+ return LED_FULL;
+
+ return LED_OFF;
+}
+
+static int
+mlxreg_led_brightness_set(struct led_classdev *cled, enum led_brightness value)
+{
+ struct mlxreg_led_data *led_data = cdev_to_priv(cled);
+
+ if (value)
+ return mlxreg_led_store_hw(led_data, led_data->base_color);
+ else
+ return mlxreg_led_store_hw(led_data, MLXREG_LED_IS_OFF);
+}
+
+static enum led_brightness
+mlxreg_led_brightness_get(struct led_classdev *cled)
+{
+ struct mlxreg_led_data *led_data = cdev_to_priv(cled);
+
+ return mlxreg_led_get_hw(led_data);
+}
+
+static int
+mlxreg_led_blink_set(struct led_classdev *cled, unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct mlxreg_led_data *led_data = cdev_to_priv(cled);
+ int err;
+
+ /*
+ * HW supports two types of blinking: full (6Hz) and half (3Hz).
+ * For delay on/off zero LED is setting to solid color. For others
+ * combination blinking is to be controlled by the software timer.
+ */
+ if (!(*delay_on == 0 && *delay_off == 0) &&
+ !(*delay_on == MLXREG_LED_BLINK_3HZ &&
+ *delay_off == MLXREG_LED_BLINK_3HZ) &&
+ !(*delay_on == MLXREG_LED_BLINK_6HZ &&
+ *delay_off == MLXREG_LED_BLINK_6HZ))
+ return -EINVAL;
+
+ if (*delay_on == MLXREG_LED_BLINK_6HZ)
+ err = mlxreg_led_store_hw(led_data, led_data->base_color +
+ MLXREG_LED_OFFSET_BLINK_6HZ);
+ else if (*delay_on == MLXREG_LED_BLINK_3HZ)
+ err = mlxreg_led_store_hw(led_data, led_data->base_color +
+ MLXREG_LED_OFFSET_BLINK_3HZ);
+ else
+ err = mlxreg_led_store_hw(led_data, led_data->base_color);
+
+ return err;
+}
+
+static int mlxreg_led_config(struct mlxreg_led_priv_data *priv)
+{
+ struct mlxreg_core_platform_data *led_pdata = priv->pdata;
+ struct mlxreg_core_data *data = led_pdata->data;
+ struct mlxreg_led_data *led_data;
+ struct led_classdev *led_cdev;
+ enum led_brightness brightness;
+ u32 regval;
+ int i;
+ int err;
+
+ for (i = 0; i < led_pdata->counter; i++, data++) {
+ led_data = devm_kzalloc(&priv->pdev->dev, sizeof(*led_data),
+ GFP_KERNEL);
+ if (!led_data)
+ return -ENOMEM;
+
+ if (data->capability) {
+ err = regmap_read(led_pdata->regmap, data->capability,
+ &regval);
+ if (err) {
+ dev_err(&priv->pdev->dev, "Failed to query capability register\n");
+ return err;
+ }
+ if (!(regval & data->bit))
+ continue;
+ /*
+ * Field "bit" can contain one capability bit in 0 byte
+ * and offset bit in 1-3 bytes. Clear capability bit and
+ * keep only offset bit.
+ */
+ data->bit &= MLXREG_LED_CAPABILITY_CLEAR;
+ }
+
+ led_cdev = &led_data->led_cdev;
+ led_data->data_parent = priv;
+ if (strstr(data->label, "red") ||
+ strstr(data->label, "orange")) {
+ brightness = LED_OFF;
+ led_data->base_color = MLXREG_LED_RED_SOLID;
+ } else if (strstr(data->label, "amber")) {
+ brightness = LED_OFF;
+ led_data->base_color = MLXREG_LED_AMBER_SOLID;
+ } else {
+ brightness = LED_OFF;
+ led_data->base_color = MLXREG_LED_GREEN_SOLID;
+ }
+ snprintf(led_data->led_cdev_name, sizeof(led_data->led_cdev_name),
+ "mlxreg:%s", data->label);
+ led_cdev->name = led_data->led_cdev_name;
+ led_cdev->brightness = brightness;
+ led_cdev->max_brightness = LED_ON;
+ led_cdev->brightness_set_blocking =
+ mlxreg_led_brightness_set;
+ led_cdev->brightness_get = mlxreg_led_brightness_get;
+ led_cdev->blink_set = mlxreg_led_blink_set;
+ led_cdev->flags = LED_CORE_SUSPENDRESUME;
+ led_data->data = data;
+ err = devm_led_classdev_register(&priv->pdev->dev, led_cdev);
+ if (err)
+ return err;
+
+ if (led_cdev->brightness)
+ mlxreg_led_brightness_set(led_cdev,
+ led_cdev->brightness);
+ dev_info(led_cdev->dev, "label: %s, mask: 0x%02x, offset:0x%02x\n",
+ data->label, data->mask, data->reg);
+ }
+
+ return 0;
+}
+
+static int mlxreg_led_probe(struct platform_device *pdev)
+{
+ struct mlxreg_core_platform_data *led_pdata;
+ struct mlxreg_led_priv_data *priv;
+
+ led_pdata = dev_get_platdata(&pdev->dev);
+ if (!led_pdata) {
+ dev_err(&pdev->dev, "Failed to get platform data.\n");
+ return -EINVAL;
+ }
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ mutex_init(&priv->access_lock);
+ priv->pdev = pdev;
+ priv->pdata = led_pdata;
+
+ return mlxreg_led_config(priv);
+}
+
+static int mlxreg_led_remove(struct platform_device *pdev)
+{
+ struct mlxreg_led_priv_data *priv = dev_get_drvdata(&pdev->dev);
+
+ mutex_destroy(&priv->access_lock);
+
+ return 0;
+}
+
+static struct platform_driver mlxreg_led_driver = {
+ .driver = {
+ .name = "leds-mlxreg",
+ },
+ .probe = mlxreg_led_probe,
+ .remove = mlxreg_led_remove,
+};
+
+module_platform_driver(mlxreg_led_driver);
+
+MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
+MODULE_DESCRIPTION("Mellanox LED regmap driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS("platform:leds-mlxreg");
diff --git a/drivers/leds/leds-mt6323.c b/drivers/leds/leds-mt6323.c
new file mode 100644
index 000000000..f59e0e8bd
--- /dev/null
+++ b/drivers/leds/leds-mt6323.c
@@ -0,0 +1,491 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * LED driver for Mediatek MT6323 PMIC
+ *
+ * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com>
+ */
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/mfd/mt6323/registers.h>
+#include <linux/mfd/mt6397/core.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+/*
+ * Register field for MT6323_TOP_CKPDN0 to enable
+ * 32K clock common for LED device.
+ */
+#define MT6323_RG_DRV_32K_CK_PDN BIT(11)
+#define MT6323_RG_DRV_32K_CK_PDN_MASK BIT(11)
+
+/*
+ * Register field for MT6323_TOP_CKPDN2 to enable
+ * individual clock for LED device.
+ */
+#define MT6323_RG_ISINK_CK_PDN(i) BIT(i)
+#define MT6323_RG_ISINK_CK_PDN_MASK(i) BIT(i)
+
+/*
+ * Register field for MT6323_TOP_CKCON1 to select
+ * clock source.
+ */
+#define MT6323_RG_ISINK_CK_SEL_MASK(i) (BIT(10) << (i))
+
+/*
+ * Register for MT6323_ISINK_CON0 to setup the
+ * duty cycle of the blink.
+ */
+#define MT6323_ISINK_CON0(i) (MT6323_ISINK0_CON0 + 0x8 * (i))
+#define MT6323_ISINK_DIM_DUTY_MASK (0x1f << 8)
+#define MT6323_ISINK_DIM_DUTY(i) (((i) << 8) & \
+ MT6323_ISINK_DIM_DUTY_MASK)
+
+/* Register to setup the period of the blink. */
+#define MT6323_ISINK_CON1(i) (MT6323_ISINK0_CON1 + 0x8 * (i))
+#define MT6323_ISINK_DIM_FSEL_MASK (0xffff)
+#define MT6323_ISINK_DIM_FSEL(i) ((i) & MT6323_ISINK_DIM_FSEL_MASK)
+
+/* Register to control the brightness. */
+#define MT6323_ISINK_CON2(i) (MT6323_ISINK0_CON2 + 0x8 * (i))
+#define MT6323_ISINK_CH_STEP_SHIFT 12
+#define MT6323_ISINK_CH_STEP_MASK (0x7 << 12)
+#define MT6323_ISINK_CH_STEP(i) (((i) << 12) & \
+ MT6323_ISINK_CH_STEP_MASK)
+#define MT6323_ISINK_SFSTR0_TC_MASK (0x3 << 1)
+#define MT6323_ISINK_SFSTR0_TC(i) (((i) << 1) & \
+ MT6323_ISINK_SFSTR0_TC_MASK)
+#define MT6323_ISINK_SFSTR0_EN_MASK BIT(0)
+#define MT6323_ISINK_SFSTR0_EN BIT(0)
+
+/* Register to LED channel enablement. */
+#define MT6323_ISINK_CH_EN_MASK(i) BIT(i)
+#define MT6323_ISINK_CH_EN(i) BIT(i)
+
+#define MT6323_MAX_PERIOD 10000
+#define MT6323_MAX_LEDS 4
+#define MT6323_MAX_BRIGHTNESS 6
+#define MT6323_UNIT_DUTY 3125
+#define MT6323_CAL_HW_DUTY(o, p) DIV_ROUND_CLOSEST((o) * 100000ul,\
+ (p) * MT6323_UNIT_DUTY)
+
+struct mt6323_leds;
+
+/**
+ * struct mt6323_led - state container for the LED device
+ * @id: the identifier in MT6323 LED device
+ * @parent: the pointer to MT6323 LED controller
+ * @cdev: LED class device for this LED device
+ * @current_brightness: current state of the LED device
+ */
+struct mt6323_led {
+ int id;
+ struct mt6323_leds *parent;
+ struct led_classdev cdev;
+ enum led_brightness current_brightness;
+};
+
+/**
+ * struct mt6323_leds - state container for holding LED controller
+ * of the driver
+ * @dev: the device pointer
+ * @hw: the underlying hardware providing shared
+ * bus for the register operations
+ * @lock: the lock among process context
+ * @led: the array that contains the state of individual
+ * LED device
+ */
+struct mt6323_leds {
+ struct device *dev;
+ struct mt6397_chip *hw;
+ /* protect among process context */
+ struct mutex lock;
+ struct mt6323_led *led[MT6323_MAX_LEDS];
+};
+
+static int mt6323_led_hw_brightness(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+ struct mt6323_leds *leds = led->parent;
+ struct regmap *regmap = leds->hw->regmap;
+ u32 con2_mask = 0, con2_val = 0;
+ int ret;
+
+ /*
+ * Setup current output for the corresponding
+ * brightness level.
+ */
+ con2_mask |= MT6323_ISINK_CH_STEP_MASK |
+ MT6323_ISINK_SFSTR0_TC_MASK |
+ MT6323_ISINK_SFSTR0_EN_MASK;
+ con2_val |= MT6323_ISINK_CH_STEP(brightness - 1) |
+ MT6323_ISINK_SFSTR0_TC(2) |
+ MT6323_ISINK_SFSTR0_EN;
+
+ ret = regmap_update_bits(regmap, MT6323_ISINK_CON2(led->id),
+ con2_mask, con2_val);
+ return ret;
+}
+
+static int mt6323_led_hw_off(struct led_classdev *cdev)
+{
+ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+ struct mt6323_leds *leds = led->parent;
+ struct regmap *regmap = leds->hw->regmap;
+ unsigned int status;
+ int ret;
+
+ status = MT6323_ISINK_CH_EN(led->id);
+ ret = regmap_update_bits(regmap, MT6323_ISINK_EN_CTRL,
+ MT6323_ISINK_CH_EN_MASK(led->id), ~status);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(100, 300);
+ ret = regmap_update_bits(regmap, MT6323_TOP_CKPDN2,
+ MT6323_RG_ISINK_CK_PDN_MASK(led->id),
+ MT6323_RG_ISINK_CK_PDN(led->id));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static enum led_brightness
+mt6323_get_led_hw_brightness(struct led_classdev *cdev)
+{
+ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+ struct mt6323_leds *leds = led->parent;
+ struct regmap *regmap = leds->hw->regmap;
+ unsigned int status;
+ int ret;
+
+ ret = regmap_read(regmap, MT6323_TOP_CKPDN2, &status);
+ if (ret < 0)
+ return ret;
+
+ if (status & MT6323_RG_ISINK_CK_PDN_MASK(led->id))
+ return 0;
+
+ ret = regmap_read(regmap, MT6323_ISINK_EN_CTRL, &status);
+ if (ret < 0)
+ return ret;
+
+ if (!(status & MT6323_ISINK_CH_EN(led->id)))
+ return 0;
+
+ ret = regmap_read(regmap, MT6323_ISINK_CON2(led->id), &status);
+ if (ret < 0)
+ return ret;
+
+ return ((status & MT6323_ISINK_CH_STEP_MASK)
+ >> MT6323_ISINK_CH_STEP_SHIFT) + 1;
+}
+
+static int mt6323_led_hw_on(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+ struct mt6323_leds *leds = led->parent;
+ struct regmap *regmap = leds->hw->regmap;
+ unsigned int status;
+ int ret;
+
+ /*
+ * Setup required clock source, enable the corresponding
+ * clock and channel and let work with continuous blink as
+ * the default.
+ */
+ ret = regmap_update_bits(regmap, MT6323_TOP_CKCON1,
+ MT6323_RG_ISINK_CK_SEL_MASK(led->id), 0);
+ if (ret < 0)
+ return ret;
+
+ status = MT6323_RG_ISINK_CK_PDN(led->id);
+ ret = regmap_update_bits(regmap, MT6323_TOP_CKPDN2,
+ MT6323_RG_ISINK_CK_PDN_MASK(led->id),
+ ~status);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(100, 300);
+
+ ret = regmap_update_bits(regmap, MT6323_ISINK_EN_CTRL,
+ MT6323_ISINK_CH_EN_MASK(led->id),
+ MT6323_ISINK_CH_EN(led->id));
+ if (ret < 0)
+ return ret;
+
+ ret = mt6323_led_hw_brightness(cdev, brightness);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_update_bits(regmap, MT6323_ISINK_CON0(led->id),
+ MT6323_ISINK_DIM_DUTY_MASK,
+ MT6323_ISINK_DIM_DUTY(31));
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_update_bits(regmap, MT6323_ISINK_CON1(led->id),
+ MT6323_ISINK_DIM_FSEL_MASK,
+ MT6323_ISINK_DIM_FSEL(1000));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int mt6323_led_set_blink(struct led_classdev *cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+ struct mt6323_leds *leds = led->parent;
+ struct regmap *regmap = leds->hw->regmap;
+ unsigned long period;
+ u8 duty_hw;
+ int ret;
+
+ /*
+ * LED subsystem requires a default user
+ * friendly blink pattern for the LED so using
+ * 1Hz duty cycle 50% here if without specific
+ * value delay_on and delay off being assigned.
+ */
+ if (!*delay_on && !*delay_off) {
+ *delay_on = 500;
+ *delay_off = 500;
+ }
+
+ /*
+ * Units are in ms, if over the hardware able
+ * to support, fallback into software blink
+ */
+ period = *delay_on + *delay_off;
+
+ if (period > MT6323_MAX_PERIOD)
+ return -EINVAL;
+
+ /*
+ * Calculate duty_hw based on the percentage of period during
+ * which the led is ON.
+ */
+ duty_hw = MT6323_CAL_HW_DUTY(*delay_on, period);
+
+ /* hardware doesn't support zero duty cycle. */
+ if (!duty_hw)
+ return -EINVAL;
+
+ mutex_lock(&leds->lock);
+ /*
+ * Set max_brightness as the software blink behavior
+ * when no blink brightness.
+ */
+ if (!led->current_brightness) {
+ ret = mt6323_led_hw_on(cdev, cdev->max_brightness);
+ if (ret < 0)
+ goto out;
+ led->current_brightness = cdev->max_brightness;
+ }
+
+ ret = regmap_update_bits(regmap, MT6323_ISINK_CON0(led->id),
+ MT6323_ISINK_DIM_DUTY_MASK,
+ MT6323_ISINK_DIM_DUTY(duty_hw - 1));
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_update_bits(regmap, MT6323_ISINK_CON1(led->id),
+ MT6323_ISINK_DIM_FSEL_MASK,
+ MT6323_ISINK_DIM_FSEL(period - 1));
+out:
+ mutex_unlock(&leds->lock);
+
+ return ret;
+}
+
+static int mt6323_led_set_brightness(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+ struct mt6323_leds *leds = led->parent;
+ int ret;
+
+ mutex_lock(&leds->lock);
+
+ if (!led->current_brightness && brightness) {
+ ret = mt6323_led_hw_on(cdev, brightness);
+ if (ret < 0)
+ goto out;
+ } else if (brightness) {
+ ret = mt6323_led_hw_brightness(cdev, brightness);
+ if (ret < 0)
+ goto out;
+ } else {
+ ret = mt6323_led_hw_off(cdev);
+ if (ret < 0)
+ goto out;
+ }
+
+ led->current_brightness = brightness;
+out:
+ mutex_unlock(&leds->lock);
+
+ return ret;
+}
+
+static int mt6323_led_set_dt_default(struct led_classdev *cdev,
+ struct device_node *np)
+{
+ struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev);
+ const char *state;
+ int ret = 0;
+
+ state = of_get_property(np, "default-state", NULL);
+ if (state) {
+ if (!strcmp(state, "keep")) {
+ ret = mt6323_get_led_hw_brightness(cdev);
+ if (ret < 0)
+ return ret;
+ led->current_brightness = ret;
+ ret = 0;
+ } else if (!strcmp(state, "on")) {
+ ret =
+ mt6323_led_set_brightness(cdev, cdev->max_brightness);
+ } else {
+ ret = mt6323_led_set_brightness(cdev, LED_OFF);
+ }
+ }
+
+ return ret;
+}
+
+static int mt6323_led_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev_of_node(dev);
+ struct device_node *child;
+ struct mt6397_chip *hw = dev_get_drvdata(dev->parent);
+ struct mt6323_leds *leds;
+ struct mt6323_led *led;
+ int ret;
+ unsigned int status;
+ u32 reg;
+
+ leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
+ if (!leds)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, leds);
+ leds->dev = dev;
+
+ /*
+ * leds->hw points to the underlying bus for the register
+ * controlled.
+ */
+ leds->hw = hw;
+ mutex_init(&leds->lock);
+
+ status = MT6323_RG_DRV_32K_CK_PDN;
+ ret = regmap_update_bits(leds->hw->regmap, MT6323_TOP_CKPDN0,
+ MT6323_RG_DRV_32K_CK_PDN_MASK, ~status);
+ if (ret < 0) {
+ dev_err(leds->dev,
+ "Failed to update MT6323_TOP_CKPDN0 Register\n");
+ return ret;
+ }
+
+ for_each_available_child_of_node(np, child) {
+ struct led_init_data init_data = {};
+
+ ret = of_property_read_u32(child, "reg", &reg);
+ if (ret) {
+ dev_err(dev, "Failed to read led 'reg' property\n");
+ goto put_child_node;
+ }
+
+ if (reg >= MT6323_MAX_LEDS || leds->led[reg]) {
+ dev_err(dev, "Invalid led reg %u\n", reg);
+ ret = -EINVAL;
+ goto put_child_node;
+ }
+
+ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+ if (!led) {
+ ret = -ENOMEM;
+ goto put_child_node;
+ }
+
+ leds->led[reg] = led;
+ leds->led[reg]->id = reg;
+ leds->led[reg]->cdev.max_brightness = MT6323_MAX_BRIGHTNESS;
+ leds->led[reg]->cdev.brightness_set_blocking =
+ mt6323_led_set_brightness;
+ leds->led[reg]->cdev.blink_set = mt6323_led_set_blink;
+ leds->led[reg]->cdev.brightness_get =
+ mt6323_get_led_hw_brightness;
+ leds->led[reg]->parent = leds;
+
+ ret = mt6323_led_set_dt_default(&leds->led[reg]->cdev, child);
+ if (ret < 0) {
+ dev_err(leds->dev,
+ "Failed to LED set default from devicetree\n");
+ goto put_child_node;
+ }
+
+ init_data.fwnode = of_fwnode_handle(child);
+
+ ret = devm_led_classdev_register_ext(dev, &leds->led[reg]->cdev,
+ &init_data);
+ if (ret) {
+ dev_err(dev, "Failed to register LED: %d\n", ret);
+ goto put_child_node;
+ }
+ }
+
+ return 0;
+
+put_child_node:
+ of_node_put(child);
+ return ret;
+}
+
+static int mt6323_led_remove(struct platform_device *pdev)
+{
+ struct mt6323_leds *leds = platform_get_drvdata(pdev);
+ int i;
+
+ /* Turn the LEDs off on driver removal. */
+ for (i = 0 ; leds->led[i] ; i++)
+ mt6323_led_hw_off(&leds->led[i]->cdev);
+
+ regmap_update_bits(leds->hw->regmap, MT6323_TOP_CKPDN0,
+ MT6323_RG_DRV_32K_CK_PDN_MASK,
+ MT6323_RG_DRV_32K_CK_PDN);
+
+ mutex_destroy(&leds->lock);
+
+ return 0;
+}
+
+static const struct of_device_id mt6323_led_dt_match[] = {
+ { .compatible = "mediatek,mt6323-led" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mt6323_led_dt_match);
+
+static struct platform_driver mt6323_led_driver = {
+ .probe = mt6323_led_probe,
+ .remove = mt6323_led_remove,
+ .driver = {
+ .name = "mt6323-led",
+ .of_match_table = mt6323_led_dt_match,
+ },
+};
+
+module_platform_driver(mt6323_led_driver);
+
+MODULE_DESCRIPTION("LED driver for Mediatek MT6323 PMIC");
+MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-net48xx.c b/drivers/leds/leds-net48xx.c
new file mode 100644
index 000000000..a93468c13
--- /dev/null
+++ b/drivers/leds/leds-net48xx.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LEDs driver for Soekris net48xx
+ *
+ * Copyright (C) 2006 Chris Boot <bootc@bootc.net>
+ *
+ * Based on leds-ams-delta.c
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/nsc_gpio.h>
+#include <linux/scx200_gpio.h>
+#include <linux/module.h>
+
+#define DRVNAME "net48xx-led"
+#define NET48XX_ERROR_LED_GPIO 20
+
+static struct platform_device *pdev;
+
+static void net48xx_error_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ scx200_gpio_ops.gpio_set(NET48XX_ERROR_LED_GPIO, value ? 1 : 0);
+}
+
+static struct led_classdev net48xx_error_led = {
+ .name = "net48xx::error",
+ .brightness_set = net48xx_error_led_set,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static int net48xx_led_probe(struct platform_device *pdev)
+{
+ return devm_led_classdev_register(&pdev->dev, &net48xx_error_led);
+}
+
+static struct platform_driver net48xx_led_driver = {
+ .probe = net48xx_led_probe,
+ .driver = {
+ .name = DRVNAME,
+ },
+};
+
+static int __init net48xx_led_init(void)
+{
+ int ret;
+
+ /* small hack, but scx200_gpio doesn't set .dev if the probe fails */
+ if (!scx200_gpio_ops.dev) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ ret = platform_driver_register(&net48xx_led_driver);
+ if (ret < 0)
+ goto out;
+
+ pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
+ if (IS_ERR(pdev)) {
+ ret = PTR_ERR(pdev);
+ platform_driver_unregister(&net48xx_led_driver);
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
+static void __exit net48xx_led_exit(void)
+{
+ platform_device_unregister(pdev);
+ platform_driver_unregister(&net48xx_led_driver);
+}
+
+module_init(net48xx_led_init);
+module_exit(net48xx_led_exit);
+
+MODULE_AUTHOR("Chris Boot <bootc@bootc.net>");
+MODULE_DESCRIPTION("Soekris net48xx LED driver");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/leds/leds-netxbig.c b/drivers/leds/leds-netxbig.c
new file mode 100644
index 000000000..77213b79f
--- /dev/null
+++ b/drivers/leds/leds-netxbig.c
@@ -0,0 +1,642 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * leds-netxbig.c - Driver for the 2Big and 5Big Network series LEDs
+ *
+ * Copyright (C) 2010 LaCie
+ *
+ * Author: Simon Guinot <sguinot@lacie.com>
+ */
+
+#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/leds.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+
+struct netxbig_gpio_ext {
+ struct gpio_desc **addr;
+ int num_addr;
+ struct gpio_desc **data;
+ int num_data;
+ struct gpio_desc *enable;
+};
+
+enum netxbig_led_mode {
+ NETXBIG_LED_OFF,
+ NETXBIG_LED_ON,
+ NETXBIG_LED_SATA,
+ NETXBIG_LED_TIMER1,
+ NETXBIG_LED_TIMER2,
+ NETXBIG_LED_MODE_NUM,
+};
+
+#define NETXBIG_LED_INVALID_MODE NETXBIG_LED_MODE_NUM
+
+struct netxbig_led_timer {
+ unsigned long delay_on;
+ unsigned long delay_off;
+ enum netxbig_led_mode mode;
+};
+
+struct netxbig_led {
+ const char *name;
+ const char *default_trigger;
+ int mode_addr;
+ int *mode_val;
+ int bright_addr;
+ int bright_max;
+};
+
+struct netxbig_led_platform_data {
+ struct netxbig_gpio_ext *gpio_ext;
+ struct netxbig_led_timer *timer;
+ int num_timer;
+ struct netxbig_led *leds;
+ int num_leds;
+};
+
+/*
+ * GPIO extension bus.
+ */
+
+static DEFINE_SPINLOCK(gpio_ext_lock);
+
+static void gpio_ext_set_addr(struct netxbig_gpio_ext *gpio_ext, int addr)
+{
+ int pin;
+
+ for (pin = 0; pin < gpio_ext->num_addr; pin++)
+ gpiod_set_value(gpio_ext->addr[pin], (addr >> pin) & 1);
+}
+
+static void gpio_ext_set_data(struct netxbig_gpio_ext *gpio_ext, int data)
+{
+ int pin;
+
+ for (pin = 0; pin < gpio_ext->num_data; pin++)
+ gpiod_set_value(gpio_ext->data[pin], (data >> pin) & 1);
+}
+
+static void gpio_ext_enable_select(struct netxbig_gpio_ext *gpio_ext)
+{
+ /* Enable select is done on the raising edge. */
+ gpiod_set_value(gpio_ext->enable, 0);
+ gpiod_set_value(gpio_ext->enable, 1);
+}
+
+static void gpio_ext_set_value(struct netxbig_gpio_ext *gpio_ext,
+ int addr, int value)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&gpio_ext_lock, flags);
+ gpio_ext_set_addr(gpio_ext, addr);
+ gpio_ext_set_data(gpio_ext, value);
+ gpio_ext_enable_select(gpio_ext);
+ spin_unlock_irqrestore(&gpio_ext_lock, flags);
+}
+
+/*
+ * Class LED driver.
+ */
+
+struct netxbig_led_data {
+ struct netxbig_gpio_ext *gpio_ext;
+ struct led_classdev cdev;
+ int mode_addr;
+ int *mode_val;
+ int bright_addr;
+ struct netxbig_led_timer *timer;
+ int num_timer;
+ enum netxbig_led_mode mode;
+ int sata;
+ spinlock_t lock;
+};
+
+static int netxbig_led_get_timer_mode(enum netxbig_led_mode *mode,
+ unsigned long delay_on,
+ unsigned long delay_off,
+ struct netxbig_led_timer *timer,
+ int num_timer)
+{
+ int i;
+
+ for (i = 0; i < num_timer; i++) {
+ if (timer[i].delay_on == delay_on &&
+ timer[i].delay_off == delay_off) {
+ *mode = timer[i].mode;
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+static int netxbig_led_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct netxbig_led_data *led_dat =
+ container_of(led_cdev, struct netxbig_led_data, cdev);
+ enum netxbig_led_mode mode;
+ int mode_val;
+ int ret;
+
+ /* Look for a LED mode with the requested timer frequency. */
+ ret = netxbig_led_get_timer_mode(&mode, *delay_on, *delay_off,
+ led_dat->timer, led_dat->num_timer);
+ if (ret < 0)
+ return ret;
+
+ mode_val = led_dat->mode_val[mode];
+ if (mode_val == NETXBIG_LED_INVALID_MODE)
+ return -EINVAL;
+
+ spin_lock_irq(&led_dat->lock);
+
+ gpio_ext_set_value(led_dat->gpio_ext, led_dat->mode_addr, mode_val);
+ led_dat->mode = mode;
+
+ spin_unlock_irq(&led_dat->lock);
+
+ return 0;
+}
+
+static void netxbig_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct netxbig_led_data *led_dat =
+ container_of(led_cdev, struct netxbig_led_data, cdev);
+ enum netxbig_led_mode mode;
+ int mode_val;
+ int set_brightness = 1;
+ unsigned long flags;
+
+ spin_lock_irqsave(&led_dat->lock, flags);
+
+ if (value == LED_OFF) {
+ mode = NETXBIG_LED_OFF;
+ set_brightness = 0;
+ } else {
+ if (led_dat->sata)
+ mode = NETXBIG_LED_SATA;
+ else if (led_dat->mode == NETXBIG_LED_OFF)
+ mode = NETXBIG_LED_ON;
+ else /* Keep 'timer' mode. */
+ mode = led_dat->mode;
+ }
+ mode_val = led_dat->mode_val[mode];
+
+ gpio_ext_set_value(led_dat->gpio_ext, led_dat->mode_addr, mode_val);
+ led_dat->mode = mode;
+ /*
+ * Note that the brightness register is shared between all the
+ * SATA LEDs. So, change the brightness setting for a single
+ * SATA LED will affect all the others.
+ */
+ if (set_brightness)
+ gpio_ext_set_value(led_dat->gpio_ext,
+ led_dat->bright_addr, value);
+
+ spin_unlock_irqrestore(&led_dat->lock, flags);
+}
+
+static ssize_t sata_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buff, size_t count)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct netxbig_led_data *led_dat =
+ container_of(led_cdev, struct netxbig_led_data, cdev);
+ unsigned long enable;
+ enum netxbig_led_mode mode;
+ int mode_val;
+ int ret;
+
+ ret = kstrtoul(buff, 10, &enable);
+ if (ret < 0)
+ return ret;
+
+ enable = !!enable;
+
+ spin_lock_irq(&led_dat->lock);
+
+ if (led_dat->sata == enable) {
+ ret = count;
+ goto exit_unlock;
+ }
+
+ if (led_dat->mode != NETXBIG_LED_ON &&
+ led_dat->mode != NETXBIG_LED_SATA)
+ mode = led_dat->mode; /* Keep modes 'off' and 'timer'. */
+ else if (enable)
+ mode = NETXBIG_LED_SATA;
+ else
+ mode = NETXBIG_LED_ON;
+
+ mode_val = led_dat->mode_val[mode];
+ if (mode_val == NETXBIG_LED_INVALID_MODE) {
+ ret = -EINVAL;
+ goto exit_unlock;
+ }
+
+ gpio_ext_set_value(led_dat->gpio_ext, led_dat->mode_addr, mode_val);
+ led_dat->mode = mode;
+ led_dat->sata = enable;
+
+ ret = count;
+
+exit_unlock:
+ spin_unlock_irq(&led_dat->lock);
+
+ return ret;
+}
+
+static ssize_t sata_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct netxbig_led_data *led_dat =
+ container_of(led_cdev, struct netxbig_led_data, cdev);
+
+ return sprintf(buf, "%d\n", led_dat->sata);
+}
+
+static DEVICE_ATTR_RW(sata);
+
+static struct attribute *netxbig_led_attrs[] = {
+ &dev_attr_sata.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(netxbig_led);
+
+static int create_netxbig_led(struct platform_device *pdev,
+ struct netxbig_led_platform_data *pdata,
+ struct netxbig_led_data *led_dat,
+ const struct netxbig_led *template)
+{
+ spin_lock_init(&led_dat->lock);
+ led_dat->gpio_ext = pdata->gpio_ext;
+ led_dat->cdev.name = template->name;
+ led_dat->cdev.default_trigger = template->default_trigger;
+ led_dat->cdev.blink_set = netxbig_led_blink_set;
+ led_dat->cdev.brightness_set = netxbig_led_set;
+ /*
+ * Because the GPIO extension bus don't allow to read registers
+ * value, there is no way to probe the LED initial state.
+ * So, the initial sysfs LED value for the "brightness" and "sata"
+ * attributes are inconsistent.
+ *
+ * Note that the initial LED state can't be reconfigured.
+ * The reason is that the LED behaviour must stay uniform during
+ * the whole boot process (bootloader+linux).
+ */
+ led_dat->sata = 0;
+ led_dat->cdev.brightness = LED_OFF;
+ led_dat->cdev.max_brightness = template->bright_max;
+ led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
+ led_dat->mode_addr = template->mode_addr;
+ led_dat->mode_val = template->mode_val;
+ led_dat->bright_addr = template->bright_addr;
+ led_dat->timer = pdata->timer;
+ led_dat->num_timer = pdata->num_timer;
+ /*
+ * If available, expose the SATA activity blink capability through
+ * a "sata" sysfs attribute.
+ */
+ if (led_dat->mode_val[NETXBIG_LED_SATA] != NETXBIG_LED_INVALID_MODE)
+ led_dat->cdev.groups = netxbig_led_groups;
+
+ return devm_led_classdev_register(&pdev->dev, &led_dat->cdev);
+}
+
+/**
+ * netxbig_gpio_ext_remove() - Clean up GPIO extension data
+ * @data: managed resource data to clean up
+ *
+ * Since we pick GPIO descriptors from another device than the device our
+ * driver is probing to, we need to register a specific callback to free
+ * these up using managed resources.
+ */
+static void netxbig_gpio_ext_remove(void *data)
+{
+ struct netxbig_gpio_ext *gpio_ext = data;
+ int i;
+
+ for (i = 0; i < gpio_ext->num_addr; i++)
+ gpiod_put(gpio_ext->addr[i]);
+ for (i = 0; i < gpio_ext->num_data; i++)
+ gpiod_put(gpio_ext->data[i]);
+ gpiod_put(gpio_ext->enable);
+}
+
+/**
+ * netxbig_gpio_ext_get() - Obtain GPIO extension device data
+ * @dev: main LED device
+ * @gpio_ext_dev: the GPIO extension device
+ * @gpio_ext: the data structure holding the GPIO extension data
+ *
+ * This function walks the subdevice that only contain GPIO line
+ * handles in the device tree and obtains the GPIO descriptors from that
+ * device.
+ */
+static int netxbig_gpio_ext_get(struct device *dev,
+ struct device *gpio_ext_dev,
+ struct netxbig_gpio_ext *gpio_ext)
+{
+ struct gpio_desc **addr, **data;
+ int num_addr, num_data;
+ struct gpio_desc *gpiod;
+ int ret;
+ int i;
+
+ ret = gpiod_count(gpio_ext_dev, "addr");
+ if (ret < 0) {
+ dev_err(dev,
+ "Failed to count GPIOs in DT property addr-gpios\n");
+ return ret;
+ }
+ num_addr = ret;
+ addr = devm_kcalloc(dev, num_addr, sizeof(*addr), GFP_KERNEL);
+ if (!addr)
+ return -ENOMEM;
+
+ /*
+ * We cannot use devm_ managed resources with these GPIO descriptors
+ * since they are associated with the "GPIO extension device" which
+ * does not probe any driver. The device tree parser will however
+ * populate a platform device for it so we can anyway obtain the
+ * GPIO descriptors from the device.
+ */
+ for (i = 0; i < num_addr; i++) {
+ gpiod = gpiod_get_index(gpio_ext_dev, "addr", i,
+ GPIOD_OUT_LOW);
+ if (IS_ERR(gpiod))
+ return PTR_ERR(gpiod);
+ gpiod_set_consumer_name(gpiod, "GPIO extension addr");
+ addr[i] = gpiod;
+ }
+ gpio_ext->addr = addr;
+ gpio_ext->num_addr = num_addr;
+
+ ret = gpiod_count(gpio_ext_dev, "data");
+ if (ret < 0) {
+ dev_err(dev,
+ "Failed to count GPIOs in DT property data-gpios\n");
+ return ret;
+ }
+ num_data = ret;
+ data = devm_kcalloc(dev, num_data, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ for (i = 0; i < num_data; i++) {
+ gpiod = gpiod_get_index(gpio_ext_dev, "data", i,
+ GPIOD_OUT_LOW);
+ if (IS_ERR(gpiod))
+ return PTR_ERR(gpiod);
+ gpiod_set_consumer_name(gpiod, "GPIO extension data");
+ data[i] = gpiod;
+ }
+ gpio_ext->data = data;
+ gpio_ext->num_data = num_data;
+
+ gpiod = gpiod_get(gpio_ext_dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(gpiod)) {
+ dev_err(dev,
+ "Failed to get GPIO from DT property enable-gpio\n");
+ return PTR_ERR(gpiod);
+ }
+ gpiod_set_consumer_name(gpiod, "GPIO extension enable");
+ gpio_ext->enable = gpiod;
+
+ return devm_add_action_or_reset(dev, netxbig_gpio_ext_remove, gpio_ext);
+}
+
+static int netxbig_leds_get_of_pdata(struct device *dev,
+ struct netxbig_led_platform_data *pdata)
+{
+ struct device_node *np = dev_of_node(dev);
+ struct device_node *gpio_ext_np;
+ struct platform_device *gpio_ext_pdev;
+ struct device *gpio_ext_dev;
+ struct device_node *child;
+ struct netxbig_gpio_ext *gpio_ext;
+ struct netxbig_led_timer *timers;
+ struct netxbig_led *leds, *led;
+ int num_timers;
+ int num_leds = 0;
+ int ret;
+ int i;
+
+ /* GPIO extension */
+ gpio_ext_np = of_parse_phandle(np, "gpio-ext", 0);
+ if (!gpio_ext_np) {
+ dev_err(dev, "Failed to get DT handle gpio-ext\n");
+ return -EINVAL;
+ }
+ gpio_ext_pdev = of_find_device_by_node(gpio_ext_np);
+ if (!gpio_ext_pdev) {
+ dev_err(dev, "Failed to find platform device for gpio-ext\n");
+ return -ENODEV;
+ }
+ gpio_ext_dev = &gpio_ext_pdev->dev;
+
+ gpio_ext = devm_kzalloc(dev, sizeof(*gpio_ext), GFP_KERNEL);
+ if (!gpio_ext) {
+ of_node_put(gpio_ext_np);
+ ret = -ENOMEM;
+ goto put_device;
+ }
+ ret = netxbig_gpio_ext_get(dev, gpio_ext_dev, gpio_ext);
+ of_node_put(gpio_ext_np);
+ if (ret)
+ goto put_device;
+ pdata->gpio_ext = gpio_ext;
+
+ /* Timers (optional) */
+ ret = of_property_count_u32_elems(np, "timers");
+ if (ret > 0) {
+ if (ret % 3) {
+ ret = -EINVAL;
+ goto put_device;
+ }
+
+ num_timers = ret / 3;
+ timers = devm_kcalloc(dev, num_timers, sizeof(*timers),
+ GFP_KERNEL);
+ if (!timers) {
+ ret = -ENOMEM;
+ goto put_device;
+ }
+ for (i = 0; i < num_timers; i++) {
+ u32 tmp;
+
+ of_property_read_u32_index(np, "timers", 3 * i,
+ &timers[i].mode);
+ if (timers[i].mode >= NETXBIG_LED_MODE_NUM) {
+ ret = -EINVAL;
+ goto put_device;
+ }
+ of_property_read_u32_index(np, "timers",
+ 3 * i + 1, &tmp);
+ timers[i].delay_on = tmp;
+ of_property_read_u32_index(np, "timers",
+ 3 * i + 2, &tmp);
+ timers[i].delay_off = tmp;
+ }
+ pdata->timer = timers;
+ pdata->num_timer = num_timers;
+ }
+
+ /* LEDs */
+ num_leds = of_get_available_child_count(np);
+ if (!num_leds) {
+ dev_err(dev, "No LED subnodes found in DT\n");
+ ret = -ENODEV;
+ goto put_device;
+ }
+
+ leds = devm_kcalloc(dev, num_leds, sizeof(*leds), GFP_KERNEL);
+ if (!leds) {
+ ret = -ENOMEM;
+ goto put_device;
+ }
+
+ led = leds;
+ for_each_available_child_of_node(np, child) {
+ const char *string;
+ int *mode_val;
+ int num_modes;
+
+ ret = of_property_read_u32(child, "mode-addr",
+ &led->mode_addr);
+ if (ret)
+ goto err_node_put;
+
+ ret = of_property_read_u32(child, "bright-addr",
+ &led->bright_addr);
+ if (ret)
+ goto err_node_put;
+
+ ret = of_property_read_u32(child, "max-brightness",
+ &led->bright_max);
+ if (ret)
+ goto err_node_put;
+
+ mode_val =
+ devm_kcalloc(dev,
+ NETXBIG_LED_MODE_NUM, sizeof(*mode_val),
+ GFP_KERNEL);
+ if (!mode_val) {
+ ret = -ENOMEM;
+ goto err_node_put;
+ }
+
+ for (i = 0; i < NETXBIG_LED_MODE_NUM; i++)
+ mode_val[i] = NETXBIG_LED_INVALID_MODE;
+
+ ret = of_property_count_u32_elems(child, "mode-val");
+ if (ret < 0 || ret % 2) {
+ ret = -EINVAL;
+ goto err_node_put;
+ }
+ num_modes = ret / 2;
+ if (num_modes > NETXBIG_LED_MODE_NUM) {
+ ret = -EINVAL;
+ goto err_node_put;
+ }
+
+ for (i = 0; i < num_modes; i++) {
+ int mode;
+ int val;
+
+ of_property_read_u32_index(child,
+ "mode-val", 2 * i, &mode);
+ of_property_read_u32_index(child,
+ "mode-val", 2 * i + 1, &val);
+ if (mode >= NETXBIG_LED_MODE_NUM) {
+ ret = -EINVAL;
+ goto err_node_put;
+ }
+ mode_val[mode] = val;
+ }
+ led->mode_val = mode_val;
+
+ if (!of_property_read_string(child, "label", &string))
+ led->name = string;
+ else
+ led->name = child->name;
+
+ if (!of_property_read_string(child,
+ "linux,default-trigger", &string))
+ led->default_trigger = string;
+
+ led++;
+ }
+
+ pdata->leds = leds;
+ pdata->num_leds = num_leds;
+
+ return 0;
+
+err_node_put:
+ of_node_put(child);
+put_device:
+ put_device(gpio_ext_dev);
+ return ret;
+}
+
+static const struct of_device_id of_netxbig_leds_match[] = {
+ { .compatible = "lacie,netxbig-leds", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_netxbig_leds_match);
+
+static int netxbig_led_probe(struct platform_device *pdev)
+{
+ struct netxbig_led_platform_data *pdata;
+ struct netxbig_led_data *leds_data;
+ int i;
+ int ret;
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+ ret = netxbig_leds_get_of_pdata(&pdev->dev, pdata);
+ if (ret)
+ return ret;
+
+ leds_data = devm_kcalloc(&pdev->dev,
+ pdata->num_leds, sizeof(*leds_data),
+ GFP_KERNEL);
+ if (!leds_data)
+ return -ENOMEM;
+
+ for (i = 0; i < pdata->num_leds; i++) {
+ ret = create_netxbig_led(pdev, pdata,
+ &leds_data[i], &pdata->leds[i]);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver netxbig_led_driver = {
+ .probe = netxbig_led_probe,
+ .driver = {
+ .name = "leds-netxbig",
+ .of_match_table = of_netxbig_leds_match,
+ },
+};
+
+module_platform_driver(netxbig_led_driver);
+
+MODULE_AUTHOR("Simon Guinot <sguinot@lacie.com>");
+MODULE_DESCRIPTION("LED driver for LaCie xBig Network boards");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:leds-netxbig");
diff --git a/drivers/leds/leds-nic78bx.c b/drivers/leds/leds-nic78bx.c
new file mode 100644
index 000000000..f196f52ee
--- /dev/null
+++ b/drivers/leds/leds-nic78bx.c
@@ -0,0 +1,200 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2016 National Instruments Corp.
+ */
+
+#include <linux/acpi.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+
+#define NIC78BX_USER1_LED_MASK 0x3
+#define NIC78BX_USER1_GREEN_LED BIT(0)
+#define NIC78BX_USER1_YELLOW_LED BIT(1)
+
+#define NIC78BX_USER2_LED_MASK 0xC
+#define NIC78BX_USER2_GREEN_LED BIT(2)
+#define NIC78BX_USER2_YELLOW_LED BIT(3)
+
+#define NIC78BX_LOCK_REG_OFFSET 1
+#define NIC78BX_LOCK_VALUE 0xA5
+#define NIC78BX_UNLOCK_VALUE 0x5A
+
+#define NIC78BX_USER_LED_IO_SIZE 2
+
+struct nic78bx_led_data {
+ u16 io_base;
+ spinlock_t lock;
+ struct platform_device *pdev;
+};
+
+struct nic78bx_led {
+ u8 bit;
+ u8 mask;
+ struct nic78bx_led_data *data;
+ struct led_classdev cdev;
+};
+
+static inline struct nic78bx_led *to_nic78bx_led(struct led_classdev *cdev)
+{
+ return container_of(cdev, struct nic78bx_led, cdev);
+}
+
+static void nic78bx_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct nic78bx_led *nled = to_nic78bx_led(cdev);
+ unsigned long flags;
+ u8 value;
+
+ spin_lock_irqsave(&nled->data->lock, flags);
+ value = inb(nled->data->io_base);
+
+ if (brightness) {
+ value &= ~nled->mask;
+ value |= nled->bit;
+ } else {
+ value &= ~nled->bit;
+ }
+
+ outb(value, nled->data->io_base);
+ spin_unlock_irqrestore(&nled->data->lock, flags);
+}
+
+static enum led_brightness nic78bx_brightness_get(struct led_classdev *cdev)
+{
+ struct nic78bx_led *nled = to_nic78bx_led(cdev);
+ unsigned long flags;
+ u8 value;
+
+ spin_lock_irqsave(&nled->data->lock, flags);
+ value = inb(nled->data->io_base);
+ spin_unlock_irqrestore(&nled->data->lock, flags);
+
+ return (value & nled->bit) ? 1 : LED_OFF;
+}
+
+static struct nic78bx_led nic78bx_leds[] = {
+ {
+ .bit = NIC78BX_USER1_GREEN_LED,
+ .mask = NIC78BX_USER1_LED_MASK,
+ .cdev = {
+ .name = "nilrt:green:user1",
+ .max_brightness = 1,
+ .brightness_set = nic78bx_brightness_set,
+ .brightness_get = nic78bx_brightness_get,
+ }
+ },
+ {
+ .bit = NIC78BX_USER1_YELLOW_LED,
+ .mask = NIC78BX_USER1_LED_MASK,
+ .cdev = {
+ .name = "nilrt:yellow:user1",
+ .max_brightness = 1,
+ .brightness_set = nic78bx_brightness_set,
+ .brightness_get = nic78bx_brightness_get,
+ }
+ },
+ {
+ .bit = NIC78BX_USER2_GREEN_LED,
+ .mask = NIC78BX_USER2_LED_MASK,
+ .cdev = {
+ .name = "nilrt:green:user2",
+ .max_brightness = 1,
+ .brightness_set = nic78bx_brightness_set,
+ .brightness_get = nic78bx_brightness_get,
+ }
+ },
+ {
+ .bit = NIC78BX_USER2_YELLOW_LED,
+ .mask = NIC78BX_USER2_LED_MASK,
+ .cdev = {
+ .name = "nilrt:yellow:user2",
+ .max_brightness = 1,
+ .brightness_set = nic78bx_brightness_set,
+ .brightness_get = nic78bx_brightness_get,
+ }
+ }
+};
+
+static int nic78bx_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct nic78bx_led_data *led_data;
+ struct resource *io_rc;
+ int ret, i;
+
+ led_data = devm_kzalloc(dev, sizeof(*led_data), GFP_KERNEL);
+ if (!led_data)
+ return -ENOMEM;
+
+ led_data->pdev = pdev;
+ platform_set_drvdata(pdev, led_data);
+
+ io_rc = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (!io_rc) {
+ dev_err(dev, "missing IO resources\n");
+ return -EINVAL;
+ }
+
+ if (resource_size(io_rc) < NIC78BX_USER_LED_IO_SIZE) {
+ dev_err(dev, "IO region too small\n");
+ return -EINVAL;
+ }
+
+ if (!devm_request_region(dev, io_rc->start, resource_size(io_rc),
+ KBUILD_MODNAME)) {
+ dev_err(dev, "failed to get IO region\n");
+ return -EBUSY;
+ }
+
+ led_data->io_base = io_rc->start;
+ spin_lock_init(&led_data->lock);
+
+ for (i = 0; i < ARRAY_SIZE(nic78bx_leds); i++) {
+ nic78bx_leds[i].data = led_data;
+
+ ret = devm_led_classdev_register(dev, &nic78bx_leds[i].cdev);
+ if (ret)
+ return ret;
+ }
+
+ /* Unlock LED register */
+ outb(NIC78BX_UNLOCK_VALUE,
+ led_data->io_base + NIC78BX_LOCK_REG_OFFSET);
+
+ return ret;
+}
+
+static int nic78bx_remove(struct platform_device *pdev)
+{
+ struct nic78bx_led_data *led_data = platform_get_drvdata(pdev);
+
+ /* Lock LED register */
+ outb(NIC78BX_LOCK_VALUE,
+ led_data->io_base + NIC78BX_LOCK_REG_OFFSET);
+
+ return 0;
+}
+
+static const struct acpi_device_id led_device_ids[] = {
+ {"NIC78B3", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, led_device_ids);
+
+static struct platform_driver led_driver = {
+ .probe = nic78bx_probe,
+ .remove = nic78bx_remove,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .acpi_match_table = ACPI_PTR(led_device_ids),
+ },
+};
+
+module_platform_driver(led_driver);
+
+MODULE_DESCRIPTION("National Instruments PXI User LEDs driver");
+MODULE_AUTHOR("Hui Chun Ong <hui.chun.ong@ni.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-ns2.c b/drivers/leds/leds-ns2.c
new file mode 100644
index 000000000..1677d66d8
--- /dev/null
+++ b/drivers/leds/leds-ns2.c
@@ -0,0 +1,284 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * leds-ns2.c - Driver for the Network Space v2 (and parents) dual-GPIO LED
+ *
+ * Copyright (C) 2010 LaCie
+ *
+ * Author: Simon Guinot <sguinot@lacie.com>
+ *
+ * Based on leds-gpio.c by Raphael Assenat <raph@8d.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include "leds.h"
+
+enum ns2_led_modes {
+ NS_V2_LED_OFF,
+ NS_V2_LED_ON,
+ NS_V2_LED_SATA,
+};
+
+/*
+ * If the size of this structure or types of its members is changed,
+ * the filling of array modval in function ns2_led_register must be changed
+ * accordingly.
+ */
+struct ns2_led_modval {
+ u32 mode;
+ u32 cmd_level;
+ u32 slow_level;
+} __packed;
+
+/*
+ * The Network Space v2 dual-GPIO LED is wired to a CPLD. Three different LED
+ * modes are available: off, on and SATA activity blinking. The LED modes are
+ * controlled through two GPIOs (command and slow): each combination of values
+ * for the command/slow GPIOs corresponds to a LED mode.
+ */
+
+struct ns2_led {
+ struct led_classdev cdev;
+ struct gpio_desc *cmd;
+ struct gpio_desc *slow;
+ bool can_sleep;
+ unsigned char sata; /* True when SATA mode active. */
+ rwlock_t rw_lock; /* Lock GPIOs. */
+ int num_modes;
+ struct ns2_led_modval *modval;
+};
+
+static int ns2_led_get_mode(struct ns2_led *led, enum ns2_led_modes *mode)
+{
+ int i;
+ int cmd_level;
+ int slow_level;
+
+ cmd_level = gpiod_get_value_cansleep(led->cmd);
+ slow_level = gpiod_get_value_cansleep(led->slow);
+
+ for (i = 0; i < led->num_modes; i++) {
+ if (cmd_level == led->modval[i].cmd_level &&
+ slow_level == led->modval[i].slow_level) {
+ *mode = led->modval[i].mode;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static void ns2_led_set_mode(struct ns2_led *led, enum ns2_led_modes mode)
+{
+ int i;
+ unsigned long flags;
+
+ for (i = 0; i < led->num_modes; i++)
+ if (mode == led->modval[i].mode)
+ break;
+
+ if (i == led->num_modes)
+ return;
+
+ write_lock_irqsave(&led->rw_lock, flags);
+
+ if (!led->can_sleep) {
+ gpiod_set_value(led->cmd, led->modval[i].cmd_level);
+ gpiod_set_value(led->slow, led->modval[i].slow_level);
+ goto exit_unlock;
+ }
+
+ gpiod_set_value_cansleep(led->cmd, led->modval[i].cmd_level);
+ gpiod_set_value_cansleep(led->slow, led->modval[i].slow_level);
+
+exit_unlock:
+ write_unlock_irqrestore(&led->rw_lock, flags);
+}
+
+static void ns2_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct ns2_led *led = container_of(led_cdev, struct ns2_led, cdev);
+ enum ns2_led_modes mode;
+
+ if (value == LED_OFF)
+ mode = NS_V2_LED_OFF;
+ else if (led->sata)
+ mode = NS_V2_LED_SATA;
+ else
+ mode = NS_V2_LED_ON;
+
+ ns2_led_set_mode(led, mode);
+}
+
+static int ns2_led_set_blocking(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ ns2_led_set(led_cdev, value);
+ return 0;
+}
+
+static ssize_t ns2_led_sata_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buff, size_t count)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct ns2_led *led = container_of(led_cdev, struct ns2_led, cdev);
+ int ret;
+ unsigned long enable;
+
+ ret = kstrtoul(buff, 10, &enable);
+ if (ret < 0)
+ return ret;
+
+ enable = !!enable;
+
+ if (led->sata == enable)
+ goto exit;
+
+ led->sata = enable;
+
+ if (!led_get_brightness(led_cdev))
+ goto exit;
+
+ if (enable)
+ ns2_led_set_mode(led, NS_V2_LED_SATA);
+ else
+ ns2_led_set_mode(led, NS_V2_LED_ON);
+
+exit:
+ return count;
+}
+
+static ssize_t ns2_led_sata_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct ns2_led *led = container_of(led_cdev, struct ns2_led, cdev);
+
+ return sprintf(buf, "%d\n", led->sata);
+}
+
+static DEVICE_ATTR(sata, 0644, ns2_led_sata_show, ns2_led_sata_store);
+
+static struct attribute *ns2_led_attrs[] = {
+ &dev_attr_sata.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(ns2_led);
+
+static int ns2_led_register(struct device *dev, struct fwnode_handle *node,
+ struct ns2_led *led)
+{
+ struct led_init_data init_data = {};
+ struct ns2_led_modval *modval;
+ enum ns2_led_modes mode;
+ int nmodes, ret;
+
+ led->cmd = devm_fwnode_gpiod_get_index(dev, node, "cmd", 0, GPIOD_ASIS,
+ fwnode_get_name(node));
+ if (IS_ERR(led->cmd))
+ return PTR_ERR(led->cmd);
+
+ led->slow = devm_fwnode_gpiod_get_index(dev, node, "slow", 0,
+ GPIOD_ASIS,
+ fwnode_get_name(node));
+ if (IS_ERR(led->slow))
+ return PTR_ERR(led->slow);
+
+ ret = fwnode_property_count_u32(node, "modes-map");
+ if (ret < 0 || ret % 3) {
+ dev_err(dev, "Missing or malformed modes-map for %pfw\n", node);
+ return -EINVAL;
+ }
+
+ nmodes = ret / 3;
+ modval = devm_kcalloc(dev, nmodes, sizeof(*modval), GFP_KERNEL);
+ if (!modval)
+ return -ENOMEM;
+
+ fwnode_property_read_u32_array(node, "modes-map", (void *)modval,
+ nmodes * 3);
+
+ rwlock_init(&led->rw_lock);
+
+ led->cdev.blink_set = NULL;
+ led->cdev.flags |= LED_CORE_SUSPENDRESUME;
+ led->cdev.groups = ns2_led_groups;
+ led->can_sleep = gpiod_cansleep(led->cmd) || gpiod_cansleep(led->slow);
+ if (led->can_sleep)
+ led->cdev.brightness_set_blocking = ns2_led_set_blocking;
+ else
+ led->cdev.brightness_set = ns2_led_set;
+ led->num_modes = nmodes;
+ led->modval = modval;
+
+ ret = ns2_led_get_mode(led, &mode);
+ if (ret < 0)
+ return ret;
+
+ /* Set LED initial state. */
+ led->sata = (mode == NS_V2_LED_SATA) ? 1 : 0;
+ led->cdev.brightness = (mode == NS_V2_LED_OFF) ? LED_OFF : LED_FULL;
+
+ init_data.fwnode = node;
+
+ ret = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
+ if (ret)
+ dev_err(dev, "Failed to register LED for node %pfw\n", node);
+
+ return ret;
+}
+
+static int ns2_led_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct fwnode_handle *child;
+ struct ns2_led *leds;
+ int count;
+ int ret;
+
+ count = device_get_child_node_count(dev);
+ if (!count)
+ return -ENODEV;
+
+ leds = devm_kzalloc(dev, array_size(sizeof(*leds), count), GFP_KERNEL);
+ if (!leds)
+ return -ENOMEM;
+
+ device_for_each_child_node(dev, child) {
+ ret = ns2_led_register(dev, child, leds++);
+ if (ret) {
+ fwnode_handle_put(child);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static const struct of_device_id of_ns2_leds_match[] = {
+ { .compatible = "lacie,ns2-leds", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_ns2_leds_match);
+
+static struct platform_driver ns2_led_driver = {
+ .probe = ns2_led_probe,
+ .driver = {
+ .name = "leds-ns2",
+ .of_match_table = of_ns2_leds_match,
+ },
+};
+
+module_platform_driver(ns2_led_driver);
+
+MODULE_AUTHOR("Simon Guinot <sguinot@lacie.com>");
+MODULE_DESCRIPTION("Network Space v2 LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:leds-ns2");
diff --git a/drivers/leds/leds-ot200.c b/drivers/leds/leds-ot200.c
new file mode 100644
index 000000000..12af1127d
--- /dev/null
+++ b/drivers/leds/leds-ot200.c
@@ -0,0 +1,152 @@
+/*
+ * Bachmann ot200 leds driver.
+ *
+ * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+ * Christian Gmeiner <christian.gmeiner@gmail.com>
+ *
+ * License: GPL as published by the FSF.
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+#include <linux/io.h>
+#include <linux/module.h>
+
+
+struct ot200_led {
+ struct led_classdev cdev;
+ const char *name;
+ unsigned long port;
+ u8 mask;
+};
+
+/*
+ * The device has three leds on the back panel (led_err, led_init and led_run)
+ * and can handle up to seven leds on the front panel.
+ */
+
+static struct ot200_led leds[] = {
+ {
+ .name = "led_run",
+ .port = 0x5a,
+ .mask = BIT(0),
+ },
+ {
+ .name = "led_init",
+ .port = 0x5a,
+ .mask = BIT(1),
+ },
+ {
+ .name = "led_err",
+ .port = 0x5a,
+ .mask = BIT(2),
+ },
+ {
+ .name = "led_1",
+ .port = 0x49,
+ .mask = BIT(6),
+ },
+ {
+ .name = "led_2",
+ .port = 0x49,
+ .mask = BIT(5),
+ },
+ {
+ .name = "led_3",
+ .port = 0x49,
+ .mask = BIT(4),
+ },
+ {
+ .name = "led_4",
+ .port = 0x49,
+ .mask = BIT(3),
+ },
+ {
+ .name = "led_5",
+ .port = 0x49,
+ .mask = BIT(2),
+ },
+ {
+ .name = "led_6",
+ .port = 0x49,
+ .mask = BIT(1),
+ },
+ {
+ .name = "led_7",
+ .port = 0x49,
+ .mask = BIT(0),
+ }
+};
+
+static DEFINE_SPINLOCK(value_lock);
+
+/*
+ * we need to store the current led states, as it is not
+ * possible to read the current led state via inb().
+ */
+static u8 leds_back;
+static u8 leds_front;
+
+static void ot200_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct ot200_led *led = container_of(led_cdev, struct ot200_led, cdev);
+ u8 *val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&value_lock, flags);
+
+ if (led->port == 0x49)
+ val = &leds_front;
+ else if (led->port == 0x5a)
+ val = &leds_back;
+ else
+ BUG();
+
+ if (value == LED_OFF)
+ *val &= ~led->mask;
+ else
+ *val |= led->mask;
+
+ outb(*val, led->port);
+ spin_unlock_irqrestore(&value_lock, flags);
+}
+
+static int ot200_led_probe(struct platform_device *pdev)
+{
+ int i;
+ int ret;
+
+ for (i = 0; i < ARRAY_SIZE(leds); i++) {
+
+ leds[i].cdev.name = leds[i].name;
+ leds[i].cdev.brightness_set = ot200_led_brightness_set;
+
+ ret = devm_led_classdev_register(&pdev->dev, &leds[i].cdev);
+ if (ret < 0)
+ return ret;
+ }
+
+ leds_front = 0; /* turn off all front leds */
+ leds_back = BIT(1); /* turn on init led */
+ outb(leds_front, 0x49);
+ outb(leds_back, 0x5a);
+
+ return 0;
+}
+
+static struct platform_driver ot200_led_driver = {
+ .probe = ot200_led_probe,
+ .driver = {
+ .name = "leds-ot200",
+ },
+};
+
+module_platform_driver(ot200_led_driver);
+
+MODULE_AUTHOR("Sebastian A. Siewior <bigeasy@linutronix.de>");
+MODULE_DESCRIPTION("ot200 LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:leds-ot200");
diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
new file mode 100644
index 000000000..df83d97cb
--- /dev/null
+++ b/drivers/leds/leds-pca9532.c
@@ -0,0 +1,560 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * pca9532.c - 16-bit Led dimmer
+ *
+ * Copyright (C) 2011 Jan Weitzel
+ * Copyright (C) 2008 Riku Voipio
+ *
+ * Datasheet: http://www.nxp.com/documents/data_sheet/PCA9532.pdf
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+#include <linux/input.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+#include <linux/leds-pca9532.h>
+#include <linux/gpio/driver.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+/* m = num_leds*/
+#define PCA9532_REG_INPUT(i) ((i) >> 3)
+#define PCA9532_REG_OFFSET(m) ((m) >> 4)
+#define PCA9532_REG_PSC(m, i) (PCA9532_REG_OFFSET(m) + 0x1 + (i) * 2)
+#define PCA9532_REG_PWM(m, i) (PCA9532_REG_OFFSET(m) + 0x2 + (i) * 2)
+#define LED_REG(m, led) (PCA9532_REG_OFFSET(m) + 0x5 + (led >> 2))
+#define LED_NUM(led) (led & 0x3)
+#define LED_SHIFT(led) (LED_NUM(led) * 2)
+#define LED_MASK(led) (0x3 << LED_SHIFT(led))
+
+#define ldev_to_led(c) container_of(c, struct pca9532_led, ldev)
+
+struct pca9532_chip_info {
+ u8 num_leds;
+};
+
+struct pca9532_data {
+ struct i2c_client *client;
+ struct pca9532_led leds[16];
+ struct mutex update_lock;
+ struct input_dev *idev;
+ struct work_struct work;
+#ifdef CONFIG_LEDS_PCA9532_GPIO
+ struct gpio_chip gpio;
+#endif
+ const struct pca9532_chip_info *chip_info;
+ u8 pwm[2];
+ u8 psc[2];
+};
+
+static int pca9532_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static void pca9532_remove(struct i2c_client *client);
+
+enum {
+ pca9530,
+ pca9531,
+ pca9532,
+ pca9533,
+};
+
+static const struct i2c_device_id pca9532_id[] = {
+ { "pca9530", pca9530 },
+ { "pca9531", pca9531 },
+ { "pca9532", pca9532 },
+ { "pca9533", pca9533 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, pca9532_id);
+
+static const struct pca9532_chip_info pca9532_chip_info_tbl[] = {
+ [pca9530] = {
+ .num_leds = 2,
+ },
+ [pca9531] = {
+ .num_leds = 8,
+ },
+ [pca9532] = {
+ .num_leds = 16,
+ },
+ [pca9533] = {
+ .num_leds = 4,
+ },
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id of_pca9532_leds_match[] = {
+ { .compatible = "nxp,pca9530", .data = (void *)pca9530 },
+ { .compatible = "nxp,pca9531", .data = (void *)pca9531 },
+ { .compatible = "nxp,pca9532", .data = (void *)pca9532 },
+ { .compatible = "nxp,pca9533", .data = (void *)pca9533 },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, of_pca9532_leds_match);
+#endif
+
+static struct i2c_driver pca9532_driver = {
+ .driver = {
+ .name = "leds-pca953x",
+ .of_match_table = of_match_ptr(of_pca9532_leds_match),
+ },
+ .probe = pca9532_probe,
+ .remove = pca9532_remove,
+ .id_table = pca9532_id,
+};
+
+/* We have two pwm/blinkers, but 16 possible leds to drive. Additionally,
+ * the clever Thecus people are using one pwm to drive the beeper. So,
+ * as a compromise we average one pwm to the values requested by all
+ * leds that are not ON/OFF.
+ * */
+static int pca9532_calcpwm(struct i2c_client *client, int pwm, int blink,
+ enum led_brightness value)
+{
+ int a = 0, b = 0, i = 0;
+ struct pca9532_data *data = i2c_get_clientdata(client);
+ for (i = 0; i < data->chip_info->num_leds; i++) {
+ if (data->leds[i].type == PCA9532_TYPE_LED &&
+ data->leds[i].state == PCA9532_PWM0+pwm) {
+ a++;
+ b += data->leds[i].ldev.brightness;
+ }
+ }
+ if (a == 0) {
+ dev_err(&client->dev,
+ "fear of division by zero %d/%d, wanted %d\n",
+ b, a, value);
+ return -EINVAL;
+ }
+ b = b/a;
+ if (b > 0xFF)
+ return -EINVAL;
+ data->pwm[pwm] = b;
+ data->psc[pwm] = blink;
+ return 0;
+}
+
+static int pca9532_setpwm(struct i2c_client *client, int pwm)
+{
+ struct pca9532_data *data = i2c_get_clientdata(client);
+ u8 maxleds = data->chip_info->num_leds;
+
+ mutex_lock(&data->update_lock);
+ i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(maxleds, pwm),
+ data->pwm[pwm]);
+ i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, pwm),
+ data->psc[pwm]);
+ mutex_unlock(&data->update_lock);
+ return 0;
+}
+
+/* Set LED routing */
+static void pca9532_setled(struct pca9532_led *led)
+{
+ struct i2c_client *client = led->client;
+ struct pca9532_data *data = i2c_get_clientdata(client);
+ u8 maxleds = data->chip_info->num_leds;
+ char reg;
+
+ mutex_lock(&data->update_lock);
+ reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id));
+ /* zero led bits */
+ reg = reg & ~LED_MASK(led->id);
+ /* set the new value */
+ reg = reg | (led->state << LED_SHIFT(led->id));
+ i2c_smbus_write_byte_data(client, LED_REG(maxleds, led->id), reg);
+ mutex_unlock(&data->update_lock);
+}
+
+static int pca9532_set_brightness(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ int err = 0;
+ struct pca9532_led *led = ldev_to_led(led_cdev);
+
+ if (value == LED_OFF)
+ led->state = PCA9532_OFF;
+ else if (value == LED_FULL)
+ led->state = PCA9532_ON;
+ else {
+ led->state = PCA9532_PWM0; /* Thecus: hardcode one pwm */
+ err = pca9532_calcpwm(led->client, 0, 0, value);
+ if (err)
+ return err;
+ }
+ if (led->state == PCA9532_PWM0)
+ pca9532_setpwm(led->client, 0);
+ pca9532_setled(led);
+ return err;
+}
+
+static int pca9532_set_blink(struct led_classdev *led_cdev,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ struct pca9532_led *led = ldev_to_led(led_cdev);
+ struct i2c_client *client = led->client;
+ int psc;
+ int err = 0;
+
+ if (*delay_on == 0 && *delay_off == 0) {
+ /* led subsystem ask us for a blink rate */
+ *delay_on = 1000;
+ *delay_off = 1000;
+ }
+ if (*delay_on != *delay_off || *delay_on > 1690 || *delay_on < 6)
+ return -EINVAL;
+
+ /* Thecus specific: only use PSC/PWM 0 */
+ psc = (*delay_on * 152-1)/1000;
+ err = pca9532_calcpwm(client, 0, psc, led_cdev->brightness);
+ if (err)
+ return err;
+ if (led->state == PCA9532_PWM0)
+ pca9532_setpwm(led->client, 0);
+ pca9532_setled(led);
+
+ return 0;
+}
+
+static int pca9532_event(struct input_dev *dev, unsigned int type,
+ unsigned int code, int value)
+{
+ struct pca9532_data *data = input_get_drvdata(dev);
+
+ if (!(type == EV_SND && (code == SND_BELL || code == SND_TONE)))
+ return -1;
+
+ /* XXX: allow different kind of beeps with psc/pwm modifications */
+ if (value > 1 && value < 32767)
+ data->pwm[1] = 127;
+ else
+ data->pwm[1] = 0;
+
+ schedule_work(&data->work);
+
+ return 0;
+}
+
+static void pca9532_input_work(struct work_struct *work)
+{
+ struct pca9532_data *data =
+ container_of(work, struct pca9532_data, work);
+ u8 maxleds = data->chip_info->num_leds;
+
+ mutex_lock(&data->update_lock);
+ i2c_smbus_write_byte_data(data->client, PCA9532_REG_PWM(maxleds, 1),
+ data->pwm[1]);
+ mutex_unlock(&data->update_lock);
+}
+
+static enum pca9532_state pca9532_getled(struct pca9532_led *led)
+{
+ struct i2c_client *client = led->client;
+ struct pca9532_data *data = i2c_get_clientdata(client);
+ u8 maxleds = data->chip_info->num_leds;
+ char reg;
+ enum pca9532_state ret;
+
+ mutex_lock(&data->update_lock);
+ reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id));
+ ret = (reg & LED_MASK(led->id)) >> LED_SHIFT(led->id);
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+#ifdef CONFIG_LEDS_PCA9532_GPIO
+static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset)
+{
+ struct pca9532_data *data = gpiochip_get_data(gc);
+ struct pca9532_led *led = &data->leds[offset];
+
+ if (led->type == PCA9532_TYPE_GPIO)
+ return 0;
+
+ return -EBUSY;
+}
+
+static void pca9532_gpio_set_value(struct gpio_chip *gc, unsigned offset, int val)
+{
+ struct pca9532_data *data = gpiochip_get_data(gc);
+ struct pca9532_led *led = &data->leds[offset];
+
+ if (val)
+ led->state = PCA9532_ON;
+ else
+ led->state = PCA9532_OFF;
+
+ pca9532_setled(led);
+}
+
+static int pca9532_gpio_get_value(struct gpio_chip *gc, unsigned offset)
+{
+ struct pca9532_data *data = gpiochip_get_data(gc);
+ unsigned char reg;
+
+ reg = i2c_smbus_read_byte_data(data->client, PCA9532_REG_INPUT(offset));
+
+ return !!(reg & (1 << (offset % 8)));
+}
+
+static int pca9532_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
+{
+ /* To use as input ensure pin is not driven */
+ pca9532_gpio_set_value(gc, offset, 0);
+
+ return 0;
+}
+
+static int pca9532_gpio_direction_output(struct gpio_chip *gc, unsigned offset, int val)
+{
+ pca9532_gpio_set_value(gc, offset, val);
+
+ return 0;
+}
+#endif /* CONFIG_LEDS_PCA9532_GPIO */
+
+static void pca9532_destroy_devices(struct pca9532_data *data, int n_devs)
+{
+ int i = n_devs;
+
+ while (--i >= 0) {
+ switch (data->leds[i].type) {
+ case PCA9532_TYPE_NONE:
+ case PCA9532_TYPE_GPIO:
+ break;
+ case PCA9532_TYPE_LED:
+ led_classdev_unregister(&data->leds[i].ldev);
+ break;
+ case PCA9532_TYPE_N2100_BEEP:
+ if (data->idev != NULL) {
+ cancel_work_sync(&data->work);
+ data->idev = NULL;
+ }
+ break;
+ }
+ }
+
+#ifdef CONFIG_LEDS_PCA9532_GPIO
+ if (data->gpio.parent)
+ gpiochip_remove(&data->gpio);
+#endif
+}
+
+static int pca9532_configure(struct i2c_client *client,
+ struct pca9532_data *data, struct pca9532_platform_data *pdata)
+{
+ int i, err = 0;
+ int gpios = 0;
+ u8 maxleds = data->chip_info->num_leds;
+
+ for (i = 0; i < 2; i++) {
+ data->pwm[i] = pdata->pwm[i];
+ data->psc[i] = pdata->psc[i];
+ i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(maxleds, i),
+ data->pwm[i]);
+ i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, i),
+ data->psc[i]);
+ }
+
+ for (i = 0; i < data->chip_info->num_leds; i++) {
+ struct pca9532_led *led = &data->leds[i];
+ struct pca9532_led *pled = &pdata->leds[i];
+ led->client = client;
+ led->id = i;
+ led->type = pled->type;
+ switch (led->type) {
+ case PCA9532_TYPE_NONE:
+ break;
+ case PCA9532_TYPE_GPIO:
+ gpios++;
+ break;
+ case PCA9532_TYPE_LED:
+ if (pled->state == PCA9532_KEEP)
+ led->state = pca9532_getled(led);
+ else
+ led->state = pled->state;
+ led->name = pled->name;
+ led->ldev.name = led->name;
+ led->ldev.default_trigger = pled->default_trigger;
+ led->ldev.brightness = LED_OFF;
+ led->ldev.brightness_set_blocking =
+ pca9532_set_brightness;
+ led->ldev.blink_set = pca9532_set_blink;
+ err = led_classdev_register(&client->dev, &led->ldev);
+ if (err < 0) {
+ dev_err(&client->dev,
+ "couldn't register LED %s\n",
+ led->name);
+ goto exit;
+ }
+ pca9532_setled(led);
+ break;
+ case PCA9532_TYPE_N2100_BEEP:
+ BUG_ON(data->idev);
+ led->state = PCA9532_PWM1;
+ pca9532_setled(led);
+ data->idev = devm_input_allocate_device(&client->dev);
+ if (data->idev == NULL) {
+ err = -ENOMEM;
+ goto exit;
+ }
+ data->idev->name = pled->name;
+ data->idev->phys = "i2c/pca9532";
+ data->idev->id.bustype = BUS_HOST;
+ data->idev->id.vendor = 0x001f;
+ data->idev->id.product = 0x0001;
+ data->idev->id.version = 0x0100;
+ data->idev->evbit[0] = BIT_MASK(EV_SND);
+ data->idev->sndbit[0] = BIT_MASK(SND_BELL) |
+ BIT_MASK(SND_TONE);
+ data->idev->event = pca9532_event;
+ input_set_drvdata(data->idev, data);
+ INIT_WORK(&data->work, pca9532_input_work);
+ err = input_register_device(data->idev);
+ if (err) {
+ cancel_work_sync(&data->work);
+ data->idev = NULL;
+ goto exit;
+ }
+ break;
+ }
+ }
+
+#ifdef CONFIG_LEDS_PCA9532_GPIO
+ if (gpios) {
+ data->gpio.label = "gpio-pca9532";
+ data->gpio.direction_input = pca9532_gpio_direction_input;
+ data->gpio.direction_output = pca9532_gpio_direction_output;
+ data->gpio.set = pca9532_gpio_set_value;
+ data->gpio.get = pca9532_gpio_get_value;
+ data->gpio.request = pca9532_gpio_request_pin;
+ data->gpio.can_sleep = 1;
+ data->gpio.base = pdata->gpio_base;
+ data->gpio.ngpio = data->chip_info->num_leds;
+ data->gpio.parent = &client->dev;
+ data->gpio.owner = THIS_MODULE;
+
+ err = gpiochip_add_data(&data->gpio, data);
+ if (err) {
+ /* Use data->gpio.dev as a flag for freeing gpiochip */
+ data->gpio.parent = NULL;
+ dev_warn(&client->dev, "could not add gpiochip\n");
+ } else {
+ dev_info(&client->dev, "gpios %i...%i\n",
+ data->gpio.base, data->gpio.base +
+ data->gpio.ngpio - 1);
+ }
+ }
+#endif
+
+ return 0;
+
+exit:
+ pca9532_destroy_devices(data, i);
+ return err;
+}
+
+static struct pca9532_platform_data *
+pca9532_of_populate_pdata(struct device *dev, struct device_node *np)
+{
+ struct pca9532_platform_data *pdata;
+ struct device_node *child;
+ int devid, maxleds;
+ int i = 0;
+ const char *state;
+
+ devid = (int)(uintptr_t)of_device_get_match_data(dev);
+ maxleds = pca9532_chip_info_tbl[devid].num_leds;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->gpio_base = -1;
+
+ of_property_read_u8_array(np, "nxp,pwm", &pdata->pwm[0],
+ ARRAY_SIZE(pdata->pwm));
+ of_property_read_u8_array(np, "nxp,psc", &pdata->psc[0],
+ ARRAY_SIZE(pdata->psc));
+
+ for_each_available_child_of_node(np, child) {
+ if (of_property_read_string(child, "label",
+ &pdata->leds[i].name))
+ pdata->leds[i].name = child->name;
+ of_property_read_u32(child, "type", &pdata->leds[i].type);
+ of_property_read_string(child, "linux,default-trigger",
+ &pdata->leds[i].default_trigger);
+ if (!of_property_read_string(child, "default-state", &state)) {
+ if (!strcmp(state, "on"))
+ pdata->leds[i].state = PCA9532_ON;
+ else if (!strcmp(state, "keep"))
+ pdata->leds[i].state = PCA9532_KEEP;
+ }
+ if (++i >= maxleds) {
+ of_node_put(child);
+ break;
+ }
+ }
+
+ return pdata;
+}
+
+static int pca9532_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int devid;
+ struct pca9532_data *data = i2c_get_clientdata(client);
+ struct pca9532_platform_data *pca9532_pdata =
+ dev_get_platdata(&client->dev);
+ struct device_node *np = dev_of_node(&client->dev);
+
+ if (!pca9532_pdata) {
+ if (np) {
+ pca9532_pdata =
+ pca9532_of_populate_pdata(&client->dev, np);
+ if (IS_ERR(pca9532_pdata))
+ return PTR_ERR(pca9532_pdata);
+ } else {
+ dev_err(&client->dev, "no platform data\n");
+ return -EINVAL;
+ }
+ devid = (int)(uintptr_t)of_device_get_match_data(&client->dev);
+ } else {
+ devid = id->driver_data;
+ }
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+
+ data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->chip_info = &pca9532_chip_info_tbl[devid];
+
+ dev_info(&client->dev, "setting platform data\n");
+ i2c_set_clientdata(client, data);
+ data->client = client;
+ mutex_init(&data->update_lock);
+
+ return pca9532_configure(client, data, pca9532_pdata);
+}
+
+static void pca9532_remove(struct i2c_client *client)
+{
+ struct pca9532_data *data = i2c_get_clientdata(client);
+
+ pca9532_destroy_devices(data, data->chip_info->num_leds);
+}
+
+module_i2c_driver(pca9532_driver);
+
+MODULE_AUTHOR("Riku Voipio");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("PCA 9532 LED dimmer");
diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
new file mode 100644
index 000000000..81aaf2121
--- /dev/null
+++ b/drivers/leds/leds-pca955x.c
@@ -0,0 +1,699 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2007-2008 Extreme Engineering Solutions, Inc.
+ *
+ * Author: Nate Case <ncase@xes-inc.com>
+ *
+ * LED driver for various PCA955x I2C LED drivers
+ *
+ * Supported devices:
+ *
+ * Device Description 7-bit slave address
+ * ------ ----------- -------------------
+ * PCA9550 2-bit driver 0x60 .. 0x61
+ * PCA9551 8-bit driver 0x60 .. 0x67
+ * PCA9552 16-bit driver 0x60 .. 0x67
+ * PCA9553/01 4-bit driver 0x62
+ * PCA9553/02 4-bit driver 0x63
+ *
+ * Philips PCA955x LED driver chips follow a register map as shown below:
+ *
+ * Control Register Description
+ * ---------------- -----------
+ * 0x0 Input register 0
+ * ..
+ * NUM_INPUT_REGS - 1 Last Input register X
+ *
+ * NUM_INPUT_REGS Frequency prescaler 0
+ * NUM_INPUT_REGS + 1 PWM register 0
+ * NUM_INPUT_REGS + 2 Frequency prescaler 1
+ * NUM_INPUT_REGS + 3 PWM register 1
+ *
+ * NUM_INPUT_REGS + 4 LED selector 0
+ * NUM_INPUT_REGS + 4
+ * + NUM_LED_REGS - 1 Last LED selector
+ *
+ * where NUM_INPUT_REGS and NUM_LED_REGS vary depending on how many
+ * bits the chip supports.
+ */
+
+#include <linux/bitops.h>
+#include <linux/ctype.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/driver.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/property.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include <dt-bindings/leds/leds-pca955x.h>
+
+/* LED select registers determine the source that drives LED outputs */
+#define PCA955X_LS_LED_ON 0x0 /* Output LOW */
+#define PCA955X_LS_LED_OFF 0x1 /* Output HI-Z */
+#define PCA955X_LS_BLINK0 0x2 /* Blink at PWM0 rate */
+#define PCA955X_LS_BLINK1 0x3 /* Blink at PWM1 rate */
+
+#define PCA955X_GPIO_INPUT LED_OFF
+#define PCA955X_GPIO_HIGH LED_OFF
+#define PCA955X_GPIO_LOW LED_FULL
+
+enum pca955x_type {
+ pca9550,
+ pca9551,
+ pca9552,
+ ibm_pca9552,
+ pca9553,
+};
+
+struct pca955x_chipdef {
+ int bits;
+ u8 slv_addr; /* 7-bit slave address mask */
+ int slv_addr_shift; /* Number of bits to ignore */
+};
+
+static struct pca955x_chipdef pca955x_chipdefs[] = {
+ [pca9550] = {
+ .bits = 2,
+ .slv_addr = /* 110000x */ 0x60,
+ .slv_addr_shift = 1,
+ },
+ [pca9551] = {
+ .bits = 8,
+ .slv_addr = /* 1100xxx */ 0x60,
+ .slv_addr_shift = 3,
+ },
+ [pca9552] = {
+ .bits = 16,
+ .slv_addr = /* 1100xxx */ 0x60,
+ .slv_addr_shift = 3,
+ },
+ [ibm_pca9552] = {
+ .bits = 16,
+ .slv_addr = /* 0110xxx */ 0x30,
+ .slv_addr_shift = 3,
+ },
+ [pca9553] = {
+ .bits = 4,
+ .slv_addr = /* 110001x */ 0x62,
+ .slv_addr_shift = 1,
+ },
+};
+
+static const struct i2c_device_id pca955x_id[] = {
+ { "pca9550", pca9550 },
+ { "pca9551", pca9551 },
+ { "pca9552", pca9552 },
+ { "ibm-pca9552", ibm_pca9552 },
+ { "pca9553", pca9553 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, pca955x_id);
+
+struct pca955x {
+ struct mutex lock;
+ struct pca955x_led *leds;
+ struct pca955x_chipdef *chipdef;
+ struct i2c_client *client;
+ unsigned long active_pins;
+#ifdef CONFIG_LEDS_PCA955X_GPIO
+ struct gpio_chip gpio;
+#endif
+};
+
+struct pca955x_led {
+ struct pca955x *pca955x;
+ struct led_classdev led_cdev;
+ int led_num; /* 0 .. 15 potentially */
+ u32 type;
+ int default_state;
+ struct fwnode_handle *fwnode;
+};
+
+struct pca955x_platform_data {
+ struct pca955x_led *leds;
+ int num_leds;
+};
+
+/* 8 bits per input register */
+static inline int pca95xx_num_input_regs(int bits)
+{
+ return (bits + 7) / 8;
+}
+
+/* 4 bits per LED selector register */
+static inline int pca95xx_num_led_regs(int bits)
+{
+ return (bits + 3) / 4;
+}
+
+/*
+ * Return an LED selector register value based on an existing one, with
+ * the appropriate 2-bit state value set for the given LED number (0-3).
+ */
+static inline u8 pca955x_ledsel(u8 oldval, int led_num, int state)
+{
+ return (oldval & (~(0x3 << (led_num << 1)))) |
+ ((state & 0x3) << (led_num << 1));
+}
+
+/*
+ * Write to frequency prescaler register, used to program the
+ * period of the PWM output. period = (PSCx + 1) / 38
+ */
+static int pca955x_write_psc(struct i2c_client *client, int n, u8 val)
+{
+ struct pca955x *pca955x = i2c_get_clientdata(client);
+ u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + (2 * n);
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(client, cmd, val);
+ if (ret < 0)
+ dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
+ __func__, n, val, ret);
+ return ret;
+}
+
+/*
+ * Write to PWM register, which determines the duty cycle of the
+ * output. LED is OFF when the count is less than the value of this
+ * register, and ON when it is greater. If PWMx == 0, LED is always OFF.
+ *
+ * Duty cycle is (256 - PWMx) / 256
+ */
+static int pca955x_write_pwm(struct i2c_client *client, int n, u8 val)
+{
+ struct pca955x *pca955x = i2c_get_clientdata(client);
+ u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n);
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(client, cmd, val);
+ if (ret < 0)
+ dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
+ __func__, n, val, ret);
+ return ret;
+}
+
+/*
+ * Write to LED selector register, which determines the source that
+ * drives the LED output.
+ */
+static int pca955x_write_ls(struct i2c_client *client, int n, u8 val)
+{
+ struct pca955x *pca955x = i2c_get_clientdata(client);
+ u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n;
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(client, cmd, val);
+ if (ret < 0)
+ dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
+ __func__, n, val, ret);
+ return ret;
+}
+
+/*
+ * Read the LED selector register, which determines the source that
+ * drives the LED output.
+ */
+static int pca955x_read_ls(struct i2c_client *client, int n, u8 *val)
+{
+ struct pca955x *pca955x = i2c_get_clientdata(client);
+ u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n;
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, cmd);
+ if (ret < 0) {
+ dev_err(&client->dev, "%s: reg 0x%x, err %d\n",
+ __func__, n, ret);
+ return ret;
+ }
+ *val = (u8)ret;
+ return 0;
+}
+
+static int pca955x_read_pwm(struct i2c_client *client, int n, u8 *val)
+{
+ struct pca955x *pca955x = i2c_get_clientdata(client);
+ u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n);
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, cmd);
+ if (ret < 0) {
+ dev_err(&client->dev, "%s: reg 0x%x, err %d\n",
+ __func__, n, ret);
+ return ret;
+ }
+ *val = (u8)ret;
+ return 0;
+}
+
+static enum led_brightness pca955x_led_get(struct led_classdev *led_cdev)
+{
+ struct pca955x_led *pca955x_led = container_of(led_cdev,
+ struct pca955x_led,
+ led_cdev);
+ struct pca955x *pca955x = pca955x_led->pca955x;
+ u8 ls, pwm;
+ int ret;
+
+ ret = pca955x_read_ls(pca955x->client, pca955x_led->led_num / 4, &ls);
+ if (ret)
+ return ret;
+
+ ls = (ls >> ((pca955x_led->led_num % 4) << 1)) & 0x3;
+ switch (ls) {
+ case PCA955X_LS_LED_ON:
+ ret = LED_FULL;
+ break;
+ case PCA955X_LS_LED_OFF:
+ ret = LED_OFF;
+ break;
+ case PCA955X_LS_BLINK0:
+ ret = LED_HALF;
+ break;
+ case PCA955X_LS_BLINK1:
+ ret = pca955x_read_pwm(pca955x->client, 1, &pwm);
+ if (ret)
+ return ret;
+ ret = 255 - pwm;
+ break;
+ }
+
+ return ret;
+}
+
+static int pca955x_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct pca955x_led *pca955x_led;
+ struct pca955x *pca955x;
+ u8 ls;
+ int chip_ls; /* which LSx to use (0-3 potentially) */
+ int ls_led; /* which set of bits within LSx to use (0-3) */
+ int ret;
+
+ pca955x_led = container_of(led_cdev, struct pca955x_led, led_cdev);
+ pca955x = pca955x_led->pca955x;
+
+ chip_ls = pca955x_led->led_num / 4;
+ ls_led = pca955x_led->led_num % 4;
+
+ mutex_lock(&pca955x->lock);
+
+ ret = pca955x_read_ls(pca955x->client, chip_ls, &ls);
+ if (ret)
+ goto out;
+
+ switch (value) {
+ case LED_FULL:
+ ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_LED_ON);
+ break;
+ case LED_OFF:
+ ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_LED_OFF);
+ break;
+ case LED_HALF:
+ ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_BLINK0);
+ break;
+ default:
+ /*
+ * Use PWM1 for all other values. This has the unwanted
+ * side effect of making all LEDs on the chip share the
+ * same brightness level if set to a value other than
+ * OFF, HALF, or FULL. But, this is probably better than
+ * just turning off for all other values.
+ */
+ ret = pca955x_write_pwm(pca955x->client, 1, 255 - value);
+ if (ret)
+ goto out;
+ ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_BLINK1);
+ break;
+ }
+
+ ret = pca955x_write_ls(pca955x->client, chip_ls, ls);
+
+out:
+ mutex_unlock(&pca955x->lock);
+
+ return ret;
+}
+
+#ifdef CONFIG_LEDS_PCA955X_GPIO
+/*
+ * Read the INPUT register, which contains the state of LEDs.
+ */
+static int pca955x_read_input(struct i2c_client *client, int n, u8 *val)
+{
+ int ret = i2c_smbus_read_byte_data(client, n);
+
+ if (ret < 0) {
+ dev_err(&client->dev, "%s: reg 0x%x, err %d\n",
+ __func__, n, ret);
+ return ret;
+ }
+ *val = (u8)ret;
+ return 0;
+
+}
+
+static int pca955x_gpio_request_pin(struct gpio_chip *gc, unsigned int offset)
+{
+ struct pca955x *pca955x = gpiochip_get_data(gc);
+
+ return test_and_set_bit(offset, &pca955x->active_pins) ? -EBUSY : 0;
+}
+
+static void pca955x_gpio_free_pin(struct gpio_chip *gc, unsigned int offset)
+{
+ struct pca955x *pca955x = gpiochip_get_data(gc);
+
+ clear_bit(offset, &pca955x->active_pins);
+}
+
+static int pca955x_set_value(struct gpio_chip *gc, unsigned int offset,
+ int val)
+{
+ struct pca955x *pca955x = gpiochip_get_data(gc);
+ struct pca955x_led *led = &pca955x->leds[offset];
+
+ if (val)
+ return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_HIGH);
+
+ return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_LOW);
+}
+
+static void pca955x_gpio_set_value(struct gpio_chip *gc, unsigned int offset,
+ int val)
+{
+ pca955x_set_value(gc, offset, val);
+}
+
+static int pca955x_gpio_get_value(struct gpio_chip *gc, unsigned int offset)
+{
+ struct pca955x *pca955x = gpiochip_get_data(gc);
+ struct pca955x_led *led = &pca955x->leds[offset];
+ u8 reg = 0;
+
+ /* There is nothing we can do about errors */
+ pca955x_read_input(pca955x->client, led->led_num / 8, &reg);
+
+ return !!(reg & (1 << (led->led_num % 8)));
+}
+
+static int pca955x_gpio_direction_input(struct gpio_chip *gc,
+ unsigned int offset)
+{
+ struct pca955x *pca955x = gpiochip_get_data(gc);
+ struct pca955x_led *led = &pca955x->leds[offset];
+
+ /* To use as input ensure pin is not driven. */
+ return pca955x_led_set(&led->led_cdev, PCA955X_GPIO_INPUT);
+}
+
+static int pca955x_gpio_direction_output(struct gpio_chip *gc,
+ unsigned int offset, int val)
+{
+ return pca955x_set_value(gc, offset, val);
+}
+#endif /* CONFIG_LEDS_PCA955X_GPIO */
+
+static struct pca955x_platform_data *
+pca955x_get_pdata(struct i2c_client *client, struct pca955x_chipdef *chip)
+{
+ struct pca955x_platform_data *pdata;
+ struct pca955x_led *led;
+ struct fwnode_handle *child;
+ int count;
+
+ count = device_get_child_node_count(&client->dev);
+ if (count > chip->bits)
+ return ERR_PTR(-ENODEV);
+
+ pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->leds = devm_kcalloc(&client->dev,
+ chip->bits, sizeof(struct pca955x_led),
+ GFP_KERNEL);
+ if (!pdata->leds)
+ return ERR_PTR(-ENOMEM);
+
+ device_for_each_child_node(&client->dev, child) {
+ const char *state;
+ u32 reg;
+ int res;
+
+ res = fwnode_property_read_u32(child, "reg", &reg);
+ if ((res != 0) || (reg >= chip->bits))
+ continue;
+
+ led = &pdata->leds[reg];
+ led->type = PCA955X_TYPE_LED;
+ led->fwnode = child;
+ fwnode_property_read_u32(child, "type", &led->type);
+
+ if (!fwnode_property_read_string(child, "default-state",
+ &state)) {
+ if (!strcmp(state, "keep"))
+ led->default_state = LEDS_GPIO_DEFSTATE_KEEP;
+ else if (!strcmp(state, "on"))
+ led->default_state = LEDS_GPIO_DEFSTATE_ON;
+ else
+ led->default_state = LEDS_GPIO_DEFSTATE_OFF;
+ } else {
+ led->default_state = LEDS_GPIO_DEFSTATE_OFF;
+ }
+ }
+
+ pdata->num_leds = chip->bits;
+
+ return pdata;
+}
+
+static const struct of_device_id of_pca955x_match[] = {
+ { .compatible = "nxp,pca9550", .data = (void *)pca9550 },
+ { .compatible = "nxp,pca9551", .data = (void *)pca9551 },
+ { .compatible = "nxp,pca9552", .data = (void *)pca9552 },
+ { .compatible = "ibm,pca9552", .data = (void *)ibm_pca9552 },
+ { .compatible = "nxp,pca9553", .data = (void *)pca9553 },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_pca955x_match);
+
+static int pca955x_probe(struct i2c_client *client)
+{
+ struct pca955x *pca955x;
+ struct pca955x_led *pca955x_led;
+ struct pca955x_chipdef *chip;
+ struct led_classdev *led;
+ struct led_init_data init_data;
+ struct i2c_adapter *adapter;
+ int i, err;
+ struct pca955x_platform_data *pdata;
+ bool set_default_label = false;
+ bool keep_pwm = false;
+ char default_label[8];
+ enum pca955x_type chip_type;
+ const void *md = device_get_match_data(&client->dev);
+
+ if (md) {
+ chip_type = (enum pca955x_type)md;
+ } else {
+ const struct i2c_device_id *id = i2c_match_id(pca955x_id,
+ client);
+
+ if (id) {
+ chip_type = (enum pca955x_type)id->driver_data;
+ } else {
+ dev_err(&client->dev, "unknown chip\n");
+ return -ENODEV;
+ }
+ }
+
+ chip = &pca955x_chipdefs[chip_type];
+ adapter = client->adapter;
+ pdata = dev_get_platdata(&client->dev);
+ if (!pdata) {
+ pdata = pca955x_get_pdata(client, chip);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ }
+
+ /* Make sure the slave address / chip type combo given is possible */
+ if ((client->addr & ~((1 << chip->slv_addr_shift) - 1)) !=
+ chip->slv_addr) {
+ dev_err(&client->dev, "invalid slave address %02x\n",
+ client->addr);
+ return -ENODEV;
+ }
+
+ dev_info(&client->dev, "leds-pca955x: Using %s %d-bit LED driver at "
+ "slave address 0x%02x\n", client->name, chip->bits,
+ client->addr);
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+
+ if (pdata->num_leds != chip->bits) {
+ dev_err(&client->dev,
+ "board info claims %d LEDs on a %d-bit chip\n",
+ pdata->num_leds, chip->bits);
+ return -ENODEV;
+ }
+
+ pca955x = devm_kzalloc(&client->dev, sizeof(*pca955x), GFP_KERNEL);
+ if (!pca955x)
+ return -ENOMEM;
+
+ pca955x->leds = devm_kcalloc(&client->dev, chip->bits,
+ sizeof(*pca955x_led), GFP_KERNEL);
+ if (!pca955x->leds)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, pca955x);
+
+ mutex_init(&pca955x->lock);
+ pca955x->client = client;
+ pca955x->chipdef = chip;
+
+ init_data.devname_mandatory = false;
+ init_data.devicename = "pca955x";
+
+ for (i = 0; i < chip->bits; i++) {
+ pca955x_led = &pca955x->leds[i];
+ pca955x_led->led_num = i;
+ pca955x_led->pca955x = pca955x;
+ pca955x_led->type = pdata->leds[i].type;
+
+ switch (pca955x_led->type) {
+ case PCA955X_TYPE_NONE:
+ case PCA955X_TYPE_GPIO:
+ break;
+ case PCA955X_TYPE_LED:
+ led = &pca955x_led->led_cdev;
+ led->brightness_set_blocking = pca955x_led_set;
+ led->brightness_get = pca955x_led_get;
+
+ if (pdata->leds[i].default_state ==
+ LEDS_GPIO_DEFSTATE_OFF) {
+ err = pca955x_led_set(led, LED_OFF);
+ if (err)
+ return err;
+ } else if (pdata->leds[i].default_state ==
+ LEDS_GPIO_DEFSTATE_ON) {
+ err = pca955x_led_set(led, LED_FULL);
+ if (err)
+ return err;
+ }
+
+ init_data.fwnode = pdata->leds[i].fwnode;
+
+ if (is_of_node(init_data.fwnode)) {
+ if (to_of_node(init_data.fwnode)->name[0] ==
+ '\0')
+ set_default_label = true;
+ else
+ set_default_label = false;
+ } else {
+ set_default_label = true;
+ }
+
+ if (set_default_label) {
+ snprintf(default_label, sizeof(default_label),
+ "%d", i);
+ init_data.default_label = default_label;
+ } else {
+ init_data.default_label = NULL;
+ }
+
+ err = devm_led_classdev_register_ext(&client->dev, led,
+ &init_data);
+ if (err)
+ return err;
+
+ set_bit(i, &pca955x->active_pins);
+
+ /*
+ * For default-state == "keep", let the core update the
+ * brightness from the hardware, then check the
+ * brightness to see if it's using PWM1. If so, PWM1
+ * should not be written below.
+ */
+ if (pdata->leds[i].default_state ==
+ LEDS_GPIO_DEFSTATE_KEEP) {
+ if (led->brightness != LED_FULL &&
+ led->brightness != LED_OFF &&
+ led->brightness != LED_HALF)
+ keep_pwm = true;
+ }
+ }
+ }
+
+ /* PWM0 is used for half brightness or 50% duty cycle */
+ err = pca955x_write_pwm(client, 0, 255 - LED_HALF);
+ if (err)
+ return err;
+
+ if (!keep_pwm) {
+ /* PWM1 is used for variable brightness, default to OFF */
+ err = pca955x_write_pwm(client, 1, 0);
+ if (err)
+ return err;
+ }
+
+ /* Set to fast frequency so we do not see flashing */
+ err = pca955x_write_psc(client, 0, 0);
+ if (err)
+ return err;
+ err = pca955x_write_psc(client, 1, 0);
+ if (err)
+ return err;
+
+#ifdef CONFIG_LEDS_PCA955X_GPIO
+ pca955x->gpio.label = "gpio-pca955x";
+ pca955x->gpio.direction_input = pca955x_gpio_direction_input;
+ pca955x->gpio.direction_output = pca955x_gpio_direction_output;
+ pca955x->gpio.set = pca955x_gpio_set_value;
+ pca955x->gpio.get = pca955x_gpio_get_value;
+ pca955x->gpio.request = pca955x_gpio_request_pin;
+ pca955x->gpio.free = pca955x_gpio_free_pin;
+ pca955x->gpio.can_sleep = 1;
+ pca955x->gpio.base = -1;
+ pca955x->gpio.ngpio = chip->bits;
+ pca955x->gpio.parent = &client->dev;
+ pca955x->gpio.owner = THIS_MODULE;
+
+ err = devm_gpiochip_add_data(&client->dev, &pca955x->gpio,
+ pca955x);
+ if (err) {
+ /* Use data->gpio.dev as a flag for freeing gpiochip */
+ pca955x->gpio.parent = NULL;
+ dev_warn(&client->dev, "could not add gpiochip\n");
+ return err;
+ }
+ dev_info(&client->dev, "gpios %i...%i\n",
+ pca955x->gpio.base, pca955x->gpio.base +
+ pca955x->gpio.ngpio - 1);
+#endif
+
+ return 0;
+}
+
+static struct i2c_driver pca955x_driver = {
+ .driver = {
+ .name = "leds-pca955x",
+ .of_match_table = of_pca955x_match,
+ },
+ .probe_new = pca955x_probe,
+ .id_table = pca955x_id,
+};
+
+module_i2c_driver(pca955x_driver);
+
+MODULE_AUTHOR("Nate Case <ncase@xes-inc.com>");
+MODULE_DESCRIPTION("PCA955x LED driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-pca963x.c b/drivers/leds/leds-pca963x.c
new file mode 100644
index 000000000..a7e052c1d
--- /dev/null
+++ b/drivers/leds/leds-pca963x.c
@@ -0,0 +1,442 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2011 bct electronic GmbH
+ * Copyright 2013 Qtechnology/AS
+ *
+ * Author: Peter Meerwald <p.meerwald@bct-electronic.com>
+ * Author: Ricardo Ribalda <ribalda@kernel.org>
+ *
+ * Based on leds-pca955x.c
+ *
+ * LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62)
+ * LED driver for the PCA9634/5 I2C LED driver (7-bit slave address set by hw.)
+ *
+ * Note that hardware blinking violates the leds infrastructure driver
+ * interface since the hardware only supports blinking all LEDs with the
+ * same delay_on/delay_off rates. That is, only the LEDs that are set to
+ * blink will actually blink but all LEDs that are set to blink will blink
+ * in identical fashion. The delay_on/delay_off values of the last LED
+ * that is set to blink will be used for all of the blinking LEDs.
+ * Hardware blinking is disabled by default but can be enabled by setting
+ * the 'blink_type' member in the platform_data struct to 'PCA963X_HW_BLINK'
+ * or by adding the 'nxp,hw-blink' property to the DTS.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/property.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+
+/* LED select registers determine the source that drives LED outputs */
+#define PCA963X_LED_OFF 0x0 /* LED driver off */
+#define PCA963X_LED_ON 0x1 /* LED driver on */
+#define PCA963X_LED_PWM 0x2 /* Controlled through PWM */
+#define PCA963X_LED_GRP_PWM 0x3 /* Controlled through PWM/GRPPWM */
+
+#define PCA963X_MODE2_OUTDRV 0x04 /* Open-drain or totem pole */
+#define PCA963X_MODE2_INVRT 0x10 /* Normal or inverted direction */
+#define PCA963X_MODE2_DMBLNK 0x20 /* Enable blinking */
+
+#define PCA963X_MODE1 0x00
+#define PCA963X_MODE2 0x01
+#define PCA963X_PWM_BASE 0x02
+
+enum pca963x_type {
+ pca9633,
+ pca9634,
+ pca9635,
+};
+
+struct pca963x_chipdef {
+ u8 grppwm;
+ u8 grpfreq;
+ u8 ledout_base;
+ int n_leds;
+ unsigned int scaling;
+};
+
+static struct pca963x_chipdef pca963x_chipdefs[] = {
+ [pca9633] = {
+ .grppwm = 0x6,
+ .grpfreq = 0x7,
+ .ledout_base = 0x8,
+ .n_leds = 4,
+ },
+ [pca9634] = {
+ .grppwm = 0xa,
+ .grpfreq = 0xb,
+ .ledout_base = 0xc,
+ .n_leds = 8,
+ },
+ [pca9635] = {
+ .grppwm = 0x12,
+ .grpfreq = 0x13,
+ .ledout_base = 0x14,
+ .n_leds = 16,
+ },
+};
+
+/* Total blink period in milliseconds */
+#define PCA963X_BLINK_PERIOD_MIN 42
+#define PCA963X_BLINK_PERIOD_MAX 10667
+
+static const struct i2c_device_id pca963x_id[] = {
+ { "pca9632", pca9633 },
+ { "pca9633", pca9633 },
+ { "pca9634", pca9634 },
+ { "pca9635", pca9635 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, pca963x_id);
+
+struct pca963x;
+
+struct pca963x_led {
+ struct pca963x *chip;
+ struct led_classdev led_cdev;
+ int led_num; /* 0 .. 15 potentially */
+ bool blinking;
+ u8 gdc;
+ u8 gfrq;
+};
+
+struct pca963x {
+ struct pca963x_chipdef *chipdef;
+ struct mutex mutex;
+ struct i2c_client *client;
+ unsigned long leds_on;
+ struct pca963x_led leds[];
+};
+
+static int pca963x_brightness(struct pca963x_led *led,
+ enum led_brightness brightness)
+{
+ struct i2c_client *client = led->chip->client;
+ struct pca963x_chipdef *chipdef = led->chip->chipdef;
+ u8 ledout_addr, ledout, mask, val;
+ int shift;
+ int ret;
+
+ ledout_addr = chipdef->ledout_base + (led->led_num / 4);
+ shift = 2 * (led->led_num % 4);
+ mask = 0x3 << shift;
+ ledout = i2c_smbus_read_byte_data(client, ledout_addr);
+
+ switch (brightness) {
+ case LED_FULL:
+ if (led->blinking) {
+ val = (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift);
+ ret = i2c_smbus_write_byte_data(client,
+ PCA963X_PWM_BASE +
+ led->led_num,
+ LED_FULL);
+ } else {
+ val = (ledout & ~mask) | (PCA963X_LED_ON << shift);
+ }
+ ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
+ break;
+ case LED_OFF:
+ val = ledout & ~mask;
+ ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
+ led->blinking = false;
+ break;
+ default:
+ ret = i2c_smbus_write_byte_data(client,
+ PCA963X_PWM_BASE +
+ led->led_num,
+ brightness);
+ if (ret < 0)
+ return ret;
+
+ if (led->blinking)
+ val = (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift);
+ else
+ val = (ledout & ~mask) | (PCA963X_LED_PWM << shift);
+
+ ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
+ break;
+ }
+
+ return ret;
+}
+
+static void pca963x_blink(struct pca963x_led *led)
+{
+ struct i2c_client *client = led->chip->client;
+ struct pca963x_chipdef *chipdef = led->chip->chipdef;
+ u8 ledout_addr, ledout, mask, val, mode2;
+ int shift;
+
+ ledout_addr = chipdef->ledout_base + (led->led_num / 4);
+ shift = 2 * (led->led_num % 4);
+ mask = 0x3 << shift;
+ mode2 = i2c_smbus_read_byte_data(client, PCA963X_MODE2);
+
+ i2c_smbus_write_byte_data(client, chipdef->grppwm, led->gdc);
+
+ i2c_smbus_write_byte_data(client, chipdef->grpfreq, led->gfrq);
+
+ if (!(mode2 & PCA963X_MODE2_DMBLNK))
+ i2c_smbus_write_byte_data(client, PCA963X_MODE2,
+ mode2 | PCA963X_MODE2_DMBLNK);
+
+ mutex_lock(&led->chip->mutex);
+
+ ledout = i2c_smbus_read_byte_data(client, ledout_addr);
+ if ((ledout & mask) != (PCA963X_LED_GRP_PWM << shift)) {
+ val = (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift);
+ i2c_smbus_write_byte_data(client, ledout_addr, val);
+ }
+
+ mutex_unlock(&led->chip->mutex);
+ led->blinking = true;
+}
+
+static int pca963x_power_state(struct pca963x_led *led)
+{
+ struct i2c_client *client = led->chip->client;
+ unsigned long *leds_on = &led->chip->leds_on;
+ unsigned long cached_leds = *leds_on;
+
+ if (led->led_cdev.brightness)
+ set_bit(led->led_num, leds_on);
+ else
+ clear_bit(led->led_num, leds_on);
+
+ if (!(*leds_on) != !cached_leds)
+ return i2c_smbus_write_byte_data(client, PCA963X_MODE1,
+ *leds_on ? 0 : BIT(4));
+
+ return 0;
+}
+
+static int pca963x_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct pca963x_led *led;
+ int ret;
+
+ led = container_of(led_cdev, struct pca963x_led, led_cdev);
+
+ mutex_lock(&led->chip->mutex);
+
+ ret = pca963x_brightness(led, value);
+ if (ret < 0)
+ goto unlock;
+ ret = pca963x_power_state(led);
+
+unlock:
+ mutex_unlock(&led->chip->mutex);
+ return ret;
+}
+
+static unsigned int pca963x_period_scale(struct pca963x_led *led,
+ unsigned int val)
+{
+ unsigned int scaling = led->chip->chipdef->scaling;
+
+ return scaling ? DIV_ROUND_CLOSEST(val * scaling, 1000) : val;
+}
+
+static int pca963x_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ unsigned long time_on, time_off, period;
+ struct pca963x_led *led;
+ u8 gdc, gfrq;
+
+ led = container_of(led_cdev, struct pca963x_led, led_cdev);
+
+ time_on = *delay_on;
+ time_off = *delay_off;
+
+ /* If both zero, pick reasonable defaults of 500ms each */
+ if (!time_on && !time_off) {
+ time_on = 500;
+ time_off = 500;
+ }
+
+ period = pca963x_period_scale(led, time_on + time_off);
+
+ /* If period not supported by hardware, default to someting sane. */
+ if ((period < PCA963X_BLINK_PERIOD_MIN) ||
+ (period > PCA963X_BLINK_PERIOD_MAX)) {
+ time_on = 500;
+ time_off = 500;
+ period = pca963x_period_scale(led, 1000);
+ }
+
+ /*
+ * From manual: duty cycle = (GDC / 256) ->
+ * (time_on / period) = (GDC / 256) ->
+ * GDC = ((time_on * 256) / period)
+ */
+ gdc = (pca963x_period_scale(led, time_on) * 256) / period;
+
+ /*
+ * From manual: period = ((GFRQ + 1) / 24) in seconds.
+ * So, period (in ms) = (((GFRQ + 1) / 24) * 1000) ->
+ * GFRQ = ((period * 24 / 1000) - 1)
+ */
+ gfrq = (period * 24 / 1000) - 1;
+
+ led->gdc = gdc;
+ led->gfrq = gfrq;
+
+ pca963x_blink(led);
+ led->led_cdev.brightness = LED_FULL;
+ pca963x_led_set(led_cdev, LED_FULL);
+
+ *delay_on = time_on;
+ *delay_off = time_off;
+
+ return 0;
+}
+
+static int pca963x_register_leds(struct i2c_client *client,
+ struct pca963x *chip)
+{
+ struct pca963x_chipdef *chipdef = chip->chipdef;
+ struct pca963x_led *led = chip->leds;
+ struct device *dev = &client->dev;
+ struct fwnode_handle *child;
+ bool hw_blink;
+ s32 mode2;
+ u32 reg;
+ int ret;
+
+ if (device_property_read_u32(dev, "nxp,period-scale",
+ &chipdef->scaling))
+ chipdef->scaling = 1000;
+
+ hw_blink = device_property_read_bool(dev, "nxp,hw-blink");
+
+ mode2 = i2c_smbus_read_byte_data(client, PCA963X_MODE2);
+ if (mode2 < 0)
+ return mode2;
+
+ /* default to open-drain unless totem pole (push-pull) is specified */
+ if (device_property_read_bool(dev, "nxp,totem-pole"))
+ mode2 |= PCA963X_MODE2_OUTDRV;
+ else
+ mode2 &= ~PCA963X_MODE2_OUTDRV;
+
+ /* default to non-inverted output, unless inverted is specified */
+ if (device_property_read_bool(dev, "nxp,inverted-out"))
+ mode2 |= PCA963X_MODE2_INVRT;
+ else
+ mode2 &= ~PCA963X_MODE2_INVRT;
+
+ ret = i2c_smbus_write_byte_data(client, PCA963X_MODE2, mode2);
+ if (ret < 0)
+ return ret;
+
+ device_for_each_child_node(dev, child) {
+ struct led_init_data init_data = {};
+ char default_label[32];
+
+ ret = fwnode_property_read_u32(child, "reg", &reg);
+ if (ret || reg >= chipdef->n_leds) {
+ dev_err(dev, "Invalid 'reg' property for node %pfw\n",
+ child);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ led->led_num = reg;
+ led->chip = chip;
+ led->led_cdev.brightness_set_blocking = pca963x_led_set;
+ if (hw_blink)
+ led->led_cdev.blink_set = pca963x_blink_set;
+ led->blinking = false;
+
+ init_data.fwnode = child;
+ /* for backwards compatibility */
+ init_data.devicename = "pca963x";
+ snprintf(default_label, sizeof(default_label), "%d:%.2x:%u",
+ client->adapter->nr, client->addr, reg);
+ init_data.default_label = default_label;
+
+ ret = devm_led_classdev_register_ext(dev, &led->led_cdev,
+ &init_data);
+ if (ret) {
+ dev_err(dev, "Failed to register LED for node %pfw\n",
+ child);
+ goto err;
+ }
+
+ ++led;
+ }
+
+ return 0;
+err:
+ fwnode_handle_put(child);
+ return ret;
+}
+
+static const struct of_device_id of_pca963x_match[] = {
+ { .compatible = "nxp,pca9632", },
+ { .compatible = "nxp,pca9633", },
+ { .compatible = "nxp,pca9634", },
+ { .compatible = "nxp,pca9635", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_pca963x_match);
+
+static int pca963x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct pca963x_chipdef *chipdef;
+ struct pca963x *chip;
+ int i, count;
+
+ chipdef = &pca963x_chipdefs[id->driver_data];
+
+ count = device_get_child_node_count(dev);
+ if (!count || count > chipdef->n_leds) {
+ dev_err(dev, "Node %pfw must define between 1 and %d LEDs\n",
+ dev_fwnode(dev), chipdef->n_leds);
+ return -EINVAL;
+ }
+
+ chip = devm_kzalloc(dev, struct_size(chip, leds, count), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, chip);
+
+ mutex_init(&chip->mutex);
+ chip->chipdef = chipdef;
+ chip->client = client;
+
+ /* Turn off LEDs by default*/
+ for (i = 0; i < chipdef->n_leds / 4; i++)
+ i2c_smbus_write_byte_data(client, chipdef->ledout_base + i, 0x00);
+
+ /* Disable LED all-call address, and power down initially */
+ i2c_smbus_write_byte_data(client, PCA963X_MODE1, BIT(4));
+
+ return pca963x_register_leds(client, chip);
+}
+
+static struct i2c_driver pca963x_driver = {
+ .driver = {
+ .name = "leds-pca963x",
+ .of_match_table = of_pca963x_match,
+ },
+ .probe = pca963x_probe,
+ .id_table = pca963x_id,
+};
+
+module_i2c_driver(pca963x_driver);
+
+MODULE_AUTHOR("Peter Meerwald <p.meerwald@bct-electronic.com>");
+MODULE_DESCRIPTION("PCA963X LED driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-pm8058.c b/drivers/leds/leds-pm8058.c
new file mode 100644
index 000000000..fb2ab72c0
--- /dev/null
+++ b/drivers/leds/leds-pm8058.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2010, 2011, 2016 The Linux Foundation. All rights reserved.
+ */
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/regmap.h>
+
+#define PM8058_LED_TYPE_COMMON 0x00
+#define PM8058_LED_TYPE_KEYPAD 0x01
+#define PM8058_LED_TYPE_FLASH 0x02
+
+#define PM8058_LED_TYPE_COMMON_MASK 0xf8
+#define PM8058_LED_TYPE_KEYPAD_MASK 0xf0
+#define PM8058_LED_TYPE_COMMON_SHIFT 3
+#define PM8058_LED_TYPE_KEYPAD_SHIFT 4
+
+struct pm8058_led {
+ struct regmap *map;
+ u32 reg;
+ u32 ledtype;
+ struct led_classdev cdev;
+};
+
+static void pm8058_led_set(struct led_classdev *cled,
+ enum led_brightness value)
+{
+ struct pm8058_led *led;
+ int ret = 0;
+ unsigned int mask = 0;
+ unsigned int val = 0;
+
+ led = container_of(cled, struct pm8058_led, cdev);
+ switch (led->ledtype) {
+ case PM8058_LED_TYPE_COMMON:
+ mask = PM8058_LED_TYPE_COMMON_MASK;
+ val = value << PM8058_LED_TYPE_COMMON_SHIFT;
+ break;
+ case PM8058_LED_TYPE_KEYPAD:
+ case PM8058_LED_TYPE_FLASH:
+ mask = PM8058_LED_TYPE_KEYPAD_MASK;
+ val = value << PM8058_LED_TYPE_KEYPAD_SHIFT;
+ break;
+ default:
+ break;
+ }
+
+ ret = regmap_update_bits(led->map, led->reg, mask, val);
+ if (ret)
+ pr_err("Failed to set LED brightness\n");
+}
+
+static enum led_brightness pm8058_led_get(struct led_classdev *cled)
+{
+ struct pm8058_led *led;
+ int ret;
+ unsigned int val;
+
+ led = container_of(cled, struct pm8058_led, cdev);
+
+ ret = regmap_read(led->map, led->reg, &val);
+ if (ret) {
+ pr_err("Failed to get LED brightness\n");
+ return LED_OFF;
+ }
+
+ switch (led->ledtype) {
+ case PM8058_LED_TYPE_COMMON:
+ val &= PM8058_LED_TYPE_COMMON_MASK;
+ val >>= PM8058_LED_TYPE_COMMON_SHIFT;
+ break;
+ case PM8058_LED_TYPE_KEYPAD:
+ case PM8058_LED_TYPE_FLASH:
+ val &= PM8058_LED_TYPE_KEYPAD_MASK;
+ val >>= PM8058_LED_TYPE_KEYPAD_SHIFT;
+ break;
+ default:
+ val = LED_OFF;
+ break;
+ }
+
+ return val;
+}
+
+static int pm8058_led_probe(struct platform_device *pdev)
+{
+ struct led_init_data init_data = {};
+ struct device *dev = &pdev->dev;
+ struct pm8058_led *led;
+ struct device_node *np;
+ int ret;
+ struct regmap *map;
+ const char *state;
+ enum led_brightness maxbright;
+
+ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->ledtype = (u32)(unsigned long)of_device_get_match_data(dev);
+
+ map = dev_get_regmap(dev->parent, NULL);
+ if (!map) {
+ dev_err(dev, "Parent regmap unavailable.\n");
+ return -ENXIO;
+ }
+ led->map = map;
+
+ np = dev_of_node(dev);
+
+ ret = of_property_read_u32(np, "reg", &led->reg);
+ if (ret) {
+ dev_err(dev, "no register offset specified\n");
+ return -EINVAL;
+ }
+
+ led->cdev.brightness_set = pm8058_led_set;
+ led->cdev.brightness_get = pm8058_led_get;
+ if (led->ledtype == PM8058_LED_TYPE_COMMON)
+ maxbright = 31; /* 5 bits */
+ else
+ maxbright = 15; /* 4 bits */
+ led->cdev.max_brightness = maxbright;
+
+ state = of_get_property(np, "default-state", NULL);
+ if (state) {
+ if (!strcmp(state, "keep")) {
+ led->cdev.brightness = pm8058_led_get(&led->cdev);
+ } else if (!strcmp(state, "on")) {
+ led->cdev.brightness = maxbright;
+ pm8058_led_set(&led->cdev, maxbright);
+ } else {
+ led->cdev.brightness = LED_OFF;
+ pm8058_led_set(&led->cdev, LED_OFF);
+ }
+ }
+
+ if (led->ledtype == PM8058_LED_TYPE_KEYPAD ||
+ led->ledtype == PM8058_LED_TYPE_FLASH)
+ led->cdev.flags = LED_CORE_SUSPENDRESUME;
+
+ init_data.fwnode = of_fwnode_handle(np);
+
+ ret = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
+ if (ret)
+ dev_err(dev, "Failed to register LED for %pOF\n", np);
+
+ return ret;
+}
+
+static const struct of_device_id pm8058_leds_id_table[] = {
+ {
+ .compatible = "qcom,pm8058-led",
+ .data = (void *)PM8058_LED_TYPE_COMMON
+ },
+ {
+ .compatible = "qcom,pm8058-keypad-led",
+ .data = (void *)PM8058_LED_TYPE_KEYPAD
+ },
+ {
+ .compatible = "qcom,pm8058-flash-led",
+ .data = (void *)PM8058_LED_TYPE_FLASH
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, pm8058_leds_id_table);
+
+static struct platform_driver pm8058_led_driver = {
+ .probe = pm8058_led_probe,
+ .driver = {
+ .name = "pm8058-leds",
+ .of_match_table = pm8058_leds_id_table,
+ },
+};
+module_platform_driver(pm8058_led_driver);
+
+MODULE_DESCRIPTION("PM8058 LEDs driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:pm8058-leds");
diff --git a/drivers/leds/leds-powernv.c b/drivers/leds/leds-powernv.c
new file mode 100644
index 000000000..743e2cdd0
--- /dev/null
+++ b/drivers/leds/leds-powernv.c
@@ -0,0 +1,349 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * PowerNV LED Driver
+ *
+ * Copyright IBM Corp. 2015
+ *
+ * Author: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
+ * Author: Anshuman Khandual <khandual@linux.vnet.ibm.com>
+ */
+
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <asm/opal.h>
+
+/* Map LED type to description. */
+struct led_type_map {
+ const int type;
+ const char *desc;
+};
+static const struct led_type_map led_type_map[] = {
+ {OPAL_SLOT_LED_TYPE_ID, "identify"},
+ {OPAL_SLOT_LED_TYPE_FAULT, "fault"},
+ {OPAL_SLOT_LED_TYPE_ATTN, "attention"},
+ {-1, NULL},
+};
+
+struct powernv_led_common {
+ /*
+ * By default unload path resets all the LEDs. But on PowerNV
+ * platform we want to retain LED state across reboot as these
+ * are controlled by firmware. Also service processor can modify
+ * the LEDs independent of OS. Hence avoid resetting LEDs in
+ * unload path.
+ */
+ bool led_disabled;
+
+ /* Max supported LED type */
+ __be64 max_led_type;
+
+ /* glabal lock */
+ struct mutex lock;
+};
+
+/* PowerNV LED data */
+struct powernv_led_data {
+ struct led_classdev cdev;
+ char *loc_code; /* LED location code */
+ int led_type; /* OPAL_SLOT_LED_TYPE_* */
+
+ struct powernv_led_common *common;
+};
+
+
+/* Returns OPAL_SLOT_LED_TYPE_* for given led type string */
+static int powernv_get_led_type(const char *led_type_desc)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(led_type_map); i++)
+ if (!strcmp(led_type_map[i].desc, led_type_desc))
+ return led_type_map[i].type;
+
+ return -1;
+}
+
+/*
+ * This commits the state change of the requested LED through an OPAL call.
+ * This function is called from work queue task context when ever it gets
+ * scheduled. This function can sleep at opal_async_wait_response call.
+ */
+static int powernv_led_set(struct powernv_led_data *powernv_led,
+ enum led_brightness value)
+{
+ int rc, token;
+ u64 led_mask, led_value = 0;
+ __be64 max_type;
+ struct opal_msg msg;
+ struct device *dev = powernv_led->cdev.dev;
+ struct powernv_led_common *powernv_led_common = powernv_led->common;
+
+ /* Prepare for the OPAL call */
+ max_type = powernv_led_common->max_led_type;
+ led_mask = OPAL_SLOT_LED_STATE_ON << powernv_led->led_type;
+ if (value)
+ led_value = led_mask;
+
+ /* OPAL async call */
+ token = opal_async_get_token_interruptible();
+ if (token < 0) {
+ if (token != -ERESTARTSYS)
+ dev_err(dev, "%s: Couldn't get OPAL async token\n",
+ __func__);
+ return token;
+ }
+
+ rc = opal_leds_set_ind(token, powernv_led->loc_code,
+ led_mask, led_value, &max_type);
+ if (rc != OPAL_ASYNC_COMPLETION) {
+ dev_err(dev, "%s: OPAL set LED call failed for %s [rc=%d]\n",
+ __func__, powernv_led->loc_code, rc);
+ goto out_token;
+ }
+
+ rc = opal_async_wait_response(token, &msg);
+ if (rc) {
+ dev_err(dev,
+ "%s: Failed to wait for the async response [rc=%d]\n",
+ __func__, rc);
+ goto out_token;
+ }
+
+ rc = opal_get_async_rc(msg);
+ if (rc != OPAL_SUCCESS)
+ dev_err(dev, "%s : OAPL async call returned failed [rc=%d]\n",
+ __func__, rc);
+
+out_token:
+ opal_async_release_token(token);
+ return rc;
+}
+
+/*
+ * This function fetches the LED state for a given LED type for
+ * mentioned LED classdev structure.
+ */
+static enum led_brightness powernv_led_get(struct powernv_led_data *powernv_led)
+{
+ int rc;
+ __be64 mask, value, max_type;
+ u64 led_mask, led_value;
+ struct device *dev = powernv_led->cdev.dev;
+ struct powernv_led_common *powernv_led_common = powernv_led->common;
+
+ /* Fetch all LED status */
+ mask = cpu_to_be64(0);
+ value = cpu_to_be64(0);
+ max_type = powernv_led_common->max_led_type;
+
+ rc = opal_leds_get_ind(powernv_led->loc_code,
+ &mask, &value, &max_type);
+ if (rc != OPAL_SUCCESS && rc != OPAL_PARTIAL) {
+ dev_err(dev, "%s: OPAL get led call failed [rc=%d]\n",
+ __func__, rc);
+ return LED_OFF;
+ }
+
+ led_mask = be64_to_cpu(mask);
+ led_value = be64_to_cpu(value);
+
+ /* LED status available */
+ if (!((led_mask >> powernv_led->led_type) & OPAL_SLOT_LED_STATE_ON)) {
+ dev_err(dev, "%s: LED status not available for %s\n",
+ __func__, powernv_led->cdev.name);
+ return LED_OFF;
+ }
+
+ /* LED status value */
+ if ((led_value >> powernv_led->led_type) & OPAL_SLOT_LED_STATE_ON)
+ return LED_FULL;
+
+ return LED_OFF;
+}
+
+/*
+ * LED classdev 'brightness_get' function. This schedules work
+ * to update LED state.
+ */
+static int powernv_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct powernv_led_data *powernv_led =
+ container_of(led_cdev, struct powernv_led_data, cdev);
+ struct powernv_led_common *powernv_led_common = powernv_led->common;
+ int rc;
+
+ /* Do not modify LED in unload path */
+ if (powernv_led_common->led_disabled)
+ return 0;
+
+ mutex_lock(&powernv_led_common->lock);
+ rc = powernv_led_set(powernv_led, value);
+ mutex_unlock(&powernv_led_common->lock);
+
+ return rc;
+}
+
+/* LED classdev 'brightness_get' function */
+static enum led_brightness powernv_brightness_get(struct led_classdev *led_cdev)
+{
+ struct powernv_led_data *powernv_led =
+ container_of(led_cdev, struct powernv_led_data, cdev);
+
+ return powernv_led_get(powernv_led);
+}
+
+/*
+ * This function registers classdev structure for any given type of LED on
+ * a given child LED device node.
+ */
+static int powernv_led_create(struct device *dev,
+ struct powernv_led_data *powernv_led,
+ const char *led_type_desc)
+{
+ int rc;
+
+ /* Make sure LED type is supported */
+ powernv_led->led_type = powernv_get_led_type(led_type_desc);
+ if (powernv_led->led_type == -1) {
+ dev_warn(dev, "%s: No support for led type : %s\n",
+ __func__, led_type_desc);
+ return -EINVAL;
+ }
+
+ /* Create the name for classdev */
+ powernv_led->cdev.name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s",
+ powernv_led->loc_code,
+ led_type_desc);
+ if (!powernv_led->cdev.name)
+ return -ENOMEM;
+
+ powernv_led->cdev.brightness_set_blocking = powernv_brightness_set;
+ powernv_led->cdev.brightness_get = powernv_brightness_get;
+ powernv_led->cdev.brightness = LED_OFF;
+ powernv_led->cdev.max_brightness = LED_FULL;
+
+ /* Register the classdev */
+ rc = devm_led_classdev_register(dev, &powernv_led->cdev);
+ if (rc) {
+ dev_err(dev, "%s: Classdev registration failed for %s\n",
+ __func__, powernv_led->cdev.name);
+ }
+
+ return rc;
+}
+
+/* Go through LED device tree node and register LED classdev structure */
+static int powernv_led_classdev(struct platform_device *pdev,
+ struct device_node *led_node,
+ struct powernv_led_common *powernv_led_common)
+{
+ const char *cur = NULL;
+ int rc = -1;
+ struct property *p;
+ struct device_node *np;
+ struct powernv_led_data *powernv_led;
+ struct device *dev = &pdev->dev;
+
+ for_each_available_child_of_node(led_node, np) {
+ p = of_find_property(np, "led-types", NULL);
+
+ while ((cur = of_prop_next_string(p, cur)) != NULL) {
+ powernv_led = devm_kzalloc(dev, sizeof(*powernv_led),
+ GFP_KERNEL);
+ if (!powernv_led) {
+ of_node_put(np);
+ return -ENOMEM;
+ }
+
+ powernv_led->common = powernv_led_common;
+ powernv_led->loc_code = (char *)np->name;
+
+ rc = powernv_led_create(dev, powernv_led, cur);
+ if (rc) {
+ of_node_put(np);
+ return rc;
+ }
+ } /* while end */
+ }
+
+ return rc;
+}
+
+/* Platform driver probe */
+static int powernv_led_probe(struct platform_device *pdev)
+{
+ struct device_node *led_node;
+ struct powernv_led_common *powernv_led_common;
+ struct device *dev = &pdev->dev;
+ int rc;
+
+ led_node = of_find_node_by_path("/ibm,opal/leds");
+ if (!led_node) {
+ dev_err(dev, "%s: LED parent device node not found\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ powernv_led_common = devm_kzalloc(dev, sizeof(*powernv_led_common),
+ GFP_KERNEL);
+ if (!powernv_led_common) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ mutex_init(&powernv_led_common->lock);
+ powernv_led_common->max_led_type = cpu_to_be64(OPAL_SLOT_LED_TYPE_MAX);
+
+ platform_set_drvdata(pdev, powernv_led_common);
+
+ rc = powernv_led_classdev(pdev, led_node, powernv_led_common);
+out:
+ of_node_put(led_node);
+ return rc;
+}
+
+/* Platform driver remove */
+static int powernv_led_remove(struct platform_device *pdev)
+{
+ struct powernv_led_common *powernv_led_common;
+
+ /* Disable LED operation */
+ powernv_led_common = platform_get_drvdata(pdev);
+ powernv_led_common->led_disabled = true;
+
+ /* Destroy lock */
+ mutex_destroy(&powernv_led_common->lock);
+
+ dev_info(&pdev->dev, "PowerNV led module unregistered\n");
+ return 0;
+}
+
+/* Platform driver property match */
+static const struct of_device_id powernv_led_match[] = {
+ {
+ .compatible = "ibm,opal-v3-led",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, powernv_led_match);
+
+static struct platform_driver powernv_led_driver = {
+ .probe = powernv_led_probe,
+ .remove = powernv_led_remove,
+ .driver = {
+ .name = "powernv-led-driver",
+ .of_match_table = powernv_led_match,
+ },
+};
+
+module_platform_driver(powernv_led_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("PowerNV LED driver");
+MODULE_AUTHOR("Vasant Hegde <hegdevasant@linux.vnet.ibm.com>");
diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
new file mode 100644
index 000000000..6d3e33e8b
--- /dev/null
+++ b/drivers/leds/leds-pwm.c
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/drivers/leds-pwm.c
+ *
+ * simple PWM based LED control
+ *
+ * Copyright 2009 Luotao Fu @ Pengutronix (l.fu@pengutronix.de)
+ *
+ * based on leds-gpio.c by Raphael Assenat <raph@8d.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/of_platform.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <linux/pwm.h>
+#include <linux/slab.h>
+#include "leds.h"
+
+struct led_pwm {
+ const char *name;
+ u8 active_low;
+ u8 default_state;
+ unsigned int max_brightness;
+};
+
+struct led_pwm_data {
+ struct led_classdev cdev;
+ struct pwm_device *pwm;
+ struct pwm_state pwmstate;
+ unsigned int active_low;
+};
+
+struct led_pwm_priv {
+ int num_leds;
+ struct led_pwm_data leds[];
+};
+
+static int led_pwm_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct led_pwm_data *led_dat =
+ container_of(led_cdev, struct led_pwm_data, cdev);
+ unsigned int max = led_dat->cdev.max_brightness;
+ unsigned long long duty = led_dat->pwmstate.period;
+
+ duty *= brightness;
+ do_div(duty, max);
+
+ if (led_dat->active_low)
+ duty = led_dat->pwmstate.period - duty;
+
+ led_dat->pwmstate.duty_cycle = duty;
+ led_dat->pwmstate.enabled = true;
+ return pwm_apply_state(led_dat->pwm, &led_dat->pwmstate);
+}
+
+__attribute__((nonnull))
+static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
+ struct led_pwm *led, struct fwnode_handle *fwnode)
+{
+ struct led_pwm_data *led_data = &priv->leds[priv->num_leds];
+ struct led_init_data init_data = { .fwnode = fwnode };
+ int ret;
+
+ led_data->active_low = led->active_low;
+ led_data->cdev.name = led->name;
+ led_data->cdev.brightness = LED_OFF;
+ led_data->cdev.max_brightness = led->max_brightness;
+ led_data->cdev.flags = LED_CORE_SUSPENDRESUME;
+
+ led_data->pwm = devm_fwnode_pwm_get(dev, fwnode, NULL);
+ if (IS_ERR(led_data->pwm))
+ return dev_err_probe(dev, PTR_ERR(led_data->pwm),
+ "unable to request PWM for %s\n",
+ led->name);
+
+ led_data->cdev.brightness_set_blocking = led_pwm_set;
+
+ /* init PWM state */
+ switch (led->default_state) {
+ case LEDS_DEFSTATE_KEEP:
+ pwm_get_state(led_data->pwm, &led_data->pwmstate);
+ if (led_data->pwmstate.period)
+ break;
+ led->default_state = LEDS_DEFSTATE_OFF;
+ dev_warn(dev,
+ "failed to read period for %s, default to off",
+ led->name);
+ fallthrough;
+ default:
+ pwm_init_state(led_data->pwm, &led_data->pwmstate);
+ break;
+ }
+
+ /* set brightness */
+ switch (led->default_state) {
+ case LEDS_DEFSTATE_ON:
+ led_data->cdev.brightness = led->max_brightness;
+ break;
+ case LEDS_DEFSTATE_KEEP:
+ {
+ uint64_t brightness;
+
+ brightness = led->max_brightness;
+ brightness *= led_data->pwmstate.duty_cycle;
+ do_div(brightness, led_data->pwmstate.period);
+ led_data->cdev.brightness = brightness;
+ }
+ break;
+ }
+
+ ret = devm_led_classdev_register_ext(dev, &led_data->cdev, &init_data);
+ if (ret) {
+ dev_err(dev, "failed to register PWM led for %s: %d\n",
+ led->name, ret);
+ return ret;
+ }
+
+ if (led->default_state != LEDS_DEFSTATE_KEEP) {
+ ret = led_pwm_set(&led_data->cdev, led_data->cdev.brightness);
+ if (ret) {
+ dev_err(dev, "failed to set led PWM value for %s: %d",
+ led->name, ret);
+ return ret;
+ }
+ }
+
+ priv->num_leds++;
+ return 0;
+}
+
+static int led_pwm_create_fwnode(struct device *dev, struct led_pwm_priv *priv)
+{
+ struct fwnode_handle *fwnode;
+ struct led_pwm led;
+ int ret;
+
+ memset(&led, 0, sizeof(led));
+
+ device_for_each_child_node(dev, fwnode) {
+ ret = fwnode_property_read_string(fwnode, "label", &led.name);
+ if (ret && is_of_node(fwnode))
+ led.name = to_of_node(fwnode)->name;
+
+ if (!led.name) {
+ ret = -EINVAL;
+ goto err_child_out;
+ }
+
+ led.active_low = fwnode_property_read_bool(fwnode,
+ "active-low");
+ fwnode_property_read_u32(fwnode, "max-brightness",
+ &led.max_brightness);
+
+ led.default_state = led_init_default_state_get(fwnode);
+
+ ret = led_pwm_add(dev, priv, &led, fwnode);
+ if (ret)
+ goto err_child_out;
+ }
+
+ return 0;
+
+err_child_out:
+ fwnode_handle_put(fwnode);
+ return ret;
+}
+
+static int led_pwm_probe(struct platform_device *pdev)
+{
+ struct led_pwm_priv *priv;
+ int ret = 0;
+ int count;
+
+ count = device_get_child_node_count(&pdev->dev);
+
+ if (!count)
+ return -EINVAL;
+
+ priv = devm_kzalloc(&pdev->dev, struct_size(priv, leds, count),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ ret = led_pwm_create_fwnode(&pdev->dev, priv);
+
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, priv);
+
+ return 0;
+}
+
+static const struct of_device_id of_pwm_leds_match[] = {
+ { .compatible = "pwm-leds", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_pwm_leds_match);
+
+static struct platform_driver led_pwm_driver = {
+ .probe = led_pwm_probe,
+ .driver = {
+ .name = "leds_pwm",
+ .of_match_table = of_pwm_leds_match,
+ },
+};
+
+module_platform_driver(led_pwm_driver);
+
+MODULE_AUTHOR("Luotao Fu <l.fu@pengutronix.de>");
+MODULE_DESCRIPTION("generic PWM LED driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:leds-pwm");
diff --git a/drivers/leds/leds-rb532.c b/drivers/leds/leds-rb532.c
new file mode 100644
index 000000000..b6447c172
--- /dev/null
+++ b/drivers/leds/leds-rb532.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LEDs driver for the "User LED" on Routerboard532
+ *
+ * Copyright (C) 2009 Phil Sutter <n0-1@freewrt.org>
+ *
+ * Based on leds-cobalt-qube.c by Florian Fainelly and
+ * rb-diag.c (my own standalone driver for both LED and
+ * button of Routerboard532).
+ */
+
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-rc32434/gpio.h>
+#include <asm/mach-rc32434/rb.h>
+
+static void rb532_led_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ if (brightness)
+ set_latch_u5(LO_ULED, 0);
+ else
+ set_latch_u5(0, LO_ULED);
+}
+
+static enum led_brightness rb532_led_get(struct led_classdev *cdev)
+{
+ return (get_latch_u5() & LO_ULED) ? LED_FULL : LED_OFF;
+}
+
+static struct led_classdev rb532_uled = {
+ .name = "uled",
+ .brightness_set = rb532_led_set,
+ .brightness_get = rb532_led_get,
+ .default_trigger = "nand-disk",
+};
+
+static int rb532_led_probe(struct platform_device *pdev)
+{
+ return led_classdev_register(&pdev->dev, &rb532_uled);
+}
+
+static int rb532_led_remove(struct platform_device *pdev)
+{
+ led_classdev_unregister(&rb532_uled);
+ return 0;
+}
+
+static struct platform_driver rb532_led_driver = {
+ .probe = rb532_led_probe,
+ .remove = rb532_led_remove,
+ .driver = {
+ .name = "rb532-led",
+ },
+};
+
+module_platform_driver(rb532_led_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("User LED support for Routerboard532");
+MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>");
+MODULE_ALIAS("platform:rb532-led");
diff --git a/drivers/leds/leds-regulator.c b/drivers/leds/leds-regulator.c
new file mode 100644
index 000000000..8a8b73b4e
--- /dev/null
+++ b/drivers/leds/leds-regulator.c
@@ -0,0 +1,205 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * leds-regulator.c - LED class driver for regulator driven LEDs.
+ *
+ * Copyright (C) 2009 Antonio Ospite <ospite@studenti.unina.it>
+ *
+ * Inspired by leds-wm8350 driver.
+ */
+
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+#include <linux/leds-regulator.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+
+#define to_regulator_led(led_cdev) \
+ container_of(led_cdev, struct regulator_led, cdev)
+
+struct regulator_led {
+ struct led_classdev cdev;
+ int enabled;
+ struct mutex mutex;
+
+ struct regulator *vcc;
+};
+
+static inline int led_regulator_get_max_brightness(struct regulator *supply)
+{
+ int ret;
+ int voltage = regulator_list_voltage(supply, 0);
+
+ if (voltage <= 0)
+ return 1;
+
+ /* even if regulator can't change voltages,
+ * we still assume it can change status
+ * and the LED can be turned on and off.
+ */
+ ret = regulator_set_voltage(supply, voltage, voltage);
+ if (ret < 0)
+ return 1;
+
+ return regulator_count_voltages(supply);
+}
+
+static int led_regulator_get_voltage(struct regulator *supply,
+ enum led_brightness brightness)
+{
+ if (brightness == 0)
+ return -EINVAL;
+
+ return regulator_list_voltage(supply, brightness - 1);
+}
+
+
+static void regulator_led_enable(struct regulator_led *led)
+{
+ int ret;
+
+ if (led->enabled)
+ return;
+
+ ret = regulator_enable(led->vcc);
+ if (ret != 0) {
+ dev_err(led->cdev.dev, "Failed to enable vcc: %d\n", ret);
+ return;
+ }
+
+ led->enabled = 1;
+}
+
+static void regulator_led_disable(struct regulator_led *led)
+{
+ int ret;
+
+ if (!led->enabled)
+ return;
+
+ ret = regulator_disable(led->vcc);
+ if (ret != 0) {
+ dev_err(led->cdev.dev, "Failed to disable vcc: %d\n", ret);
+ return;
+ }
+
+ led->enabled = 0;
+}
+
+static int regulator_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct regulator_led *led = to_regulator_led(led_cdev);
+ int voltage;
+ int ret = 0;
+
+ mutex_lock(&led->mutex);
+
+ if (value == LED_OFF) {
+ regulator_led_disable(led);
+ goto out;
+ }
+
+ if (led->cdev.max_brightness > 1) {
+ voltage = led_regulator_get_voltage(led->vcc, value);
+ dev_dbg(led->cdev.dev, "brightness: %d voltage: %d\n",
+ value, voltage);
+
+ ret = regulator_set_voltage(led->vcc, voltage, voltage);
+ if (ret != 0)
+ dev_err(led->cdev.dev, "Failed to set voltage %d: %d\n",
+ voltage, ret);
+ }
+
+ regulator_led_enable(led);
+
+out:
+ mutex_unlock(&led->mutex);
+ return ret;
+}
+
+static int regulator_led_probe(struct platform_device *pdev)
+{
+ struct led_regulator_platform_data *pdata =
+ dev_get_platdata(&pdev->dev);
+ struct device *dev = &pdev->dev;
+ struct led_init_data init_data = {};
+ struct regulator_led *led;
+ struct regulator *vcc;
+ int ret = 0;
+
+ vcc = devm_regulator_get_exclusive(dev, "vled");
+ if (IS_ERR(vcc)) {
+ dev_err(dev, "Cannot get vcc\n");
+ return PTR_ERR(vcc);
+ }
+
+ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+ if (led == NULL)
+ return -ENOMEM;
+
+ init_data.fwnode = dev->fwnode;
+
+ led->cdev.max_brightness = led_regulator_get_max_brightness(vcc);
+ /* Legacy platform data label assignment */
+ if (pdata) {
+ if (pdata->brightness > led->cdev.max_brightness) {
+ dev_err(dev, "Invalid default brightness %d\n",
+ pdata->brightness);
+ return -EINVAL;
+ }
+ led->cdev.brightness = pdata->brightness;
+ init_data.default_label = pdata->name;
+ }
+
+ led->cdev.brightness_set_blocking = regulator_led_brightness_set;
+ led->cdev.flags |= LED_CORE_SUSPENDRESUME;
+ led->vcc = vcc;
+
+ /* to handle correctly an already enabled regulator */
+ if (regulator_is_enabled(led->vcc))
+ led->enabled = 1;
+
+ mutex_init(&led->mutex);
+
+ platform_set_drvdata(pdev, led);
+
+ ret = led_classdev_register_ext(dev, &led->cdev, &init_data);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int regulator_led_remove(struct platform_device *pdev)
+{
+ struct regulator_led *led = platform_get_drvdata(pdev);
+
+ led_classdev_unregister(&led->cdev);
+ regulator_led_disable(led);
+ return 0;
+}
+
+static const struct of_device_id regulator_led_of_match[] = {
+ { .compatible = "regulator-led", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, regulator_led_of_match);
+
+static struct platform_driver regulator_led_driver = {
+ .driver = {
+ .name = "leds-regulator",
+ .of_match_table = regulator_led_of_match,
+ },
+ .probe = regulator_led_probe,
+ .remove = regulator_led_remove,
+};
+
+module_platform_driver(regulator_led_driver);
+
+MODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>");
+MODULE_DESCRIPTION("Regulator driven LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:leds-regulator");
diff --git a/drivers/leds/leds-s3c24xx.c b/drivers/leds/leds-s3c24xx.c
new file mode 100644
index 000000000..3c0c7aa63
--- /dev/null
+++ b/drivers/leds/leds-s3c24xx.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* drivers/leds/leds-s3c24xx.c
+ *
+ * (c) 2006 Simtec Electronics
+ * http://armlinux.simtec.co.uk/
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX - LEDs GPIO driver
+*/
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/gpio/consumer.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_data/leds-s3c24xx.h>
+
+/* our context */
+
+struct s3c24xx_gpio_led {
+ struct led_classdev cdev;
+ struct s3c24xx_led_platdata *pdata;
+ struct gpio_desc *gpiod;
+};
+
+static inline struct s3c24xx_gpio_led *to_gpio(struct led_classdev *led_cdev)
+{
+ return container_of(led_cdev, struct s3c24xx_gpio_led, cdev);
+}
+
+static void s3c24xx_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct s3c24xx_gpio_led *led = to_gpio(led_cdev);
+
+ gpiod_set_value(led->gpiod, !!value);
+}
+
+static int s3c24xx_led_probe(struct platform_device *dev)
+{
+ struct s3c24xx_led_platdata *pdata = dev_get_platdata(&dev->dev);
+ struct s3c24xx_gpio_led *led;
+ int ret;
+
+ led = devm_kzalloc(&dev->dev, sizeof(struct s3c24xx_gpio_led),
+ GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->cdev.brightness_set = s3c24xx_led_set;
+ led->cdev.default_trigger = pdata->def_trigger;
+ led->cdev.name = pdata->name;
+ led->cdev.flags |= LED_CORE_SUSPENDRESUME;
+
+ led->pdata = pdata;
+
+ /* Default to off */
+ led->gpiod = devm_gpiod_get(&dev->dev, NULL, GPIOD_OUT_LOW);
+ if (IS_ERR(led->gpiod))
+ return PTR_ERR(led->gpiod);
+
+ /* register our new led device */
+ ret = devm_led_classdev_register(&dev->dev, &led->cdev);
+ if (ret < 0)
+ dev_err(&dev->dev, "led_classdev_register failed\n");
+
+ return ret;
+}
+
+static struct platform_driver s3c24xx_led_driver = {
+ .probe = s3c24xx_led_probe,
+ .driver = {
+ .name = "s3c24xx_led",
+ },
+};
+
+module_platform_driver(s3c24xx_led_driver);
+
+MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
+MODULE_DESCRIPTION("S3C24XX LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:s3c24xx_led");
diff --git a/drivers/leds/leds-sc27xx-bltc.c b/drivers/leds/leds-sc27xx-bltc.c
new file mode 100644
index 000000000..e199ea15e
--- /dev/null
+++ b/drivers/leds/leds-sc27xx-bltc.c
@@ -0,0 +1,361 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Spreadtrum Communications Inc.
+
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+/* PMIC global control register definition */
+#define SC27XX_MODULE_EN0 0xc08
+#define SC27XX_CLK_EN0 0xc18
+#define SC27XX_RGB_CTRL 0xebc
+
+#define SC27XX_BLTC_EN BIT(9)
+#define SC27XX_RTC_EN BIT(7)
+#define SC27XX_RGB_PD BIT(0)
+
+/* Breathing light controller register definition */
+#define SC27XX_LEDS_CTRL 0x00
+#define SC27XX_LEDS_PRESCALE 0x04
+#define SC27XX_LEDS_DUTY 0x08
+#define SC27XX_LEDS_CURVE0 0x0c
+#define SC27XX_LEDS_CURVE1 0x10
+
+#define SC27XX_CTRL_SHIFT 4
+#define SC27XX_LED_RUN BIT(0)
+#define SC27XX_LED_TYPE BIT(1)
+
+#define SC27XX_DUTY_SHIFT 8
+#define SC27XX_DUTY_MASK GENMASK(15, 0)
+#define SC27XX_MOD_MASK GENMASK(7, 0)
+
+#define SC27XX_CURVE_SHIFT 8
+#define SC27XX_CURVE_L_MASK GENMASK(7, 0)
+#define SC27XX_CURVE_H_MASK GENMASK(15, 8)
+
+#define SC27XX_LEDS_OFFSET 0x10
+#define SC27XX_LEDS_MAX 3
+#define SC27XX_LEDS_PATTERN_CNT 4
+/* Stage duration step, in milliseconds */
+#define SC27XX_LEDS_STEP 125
+/* Minimum and maximum duration, in milliseconds */
+#define SC27XX_DELTA_T_MIN SC27XX_LEDS_STEP
+#define SC27XX_DELTA_T_MAX (SC27XX_LEDS_STEP * 255)
+
+struct sc27xx_led {
+ struct fwnode_handle *fwnode;
+ struct led_classdev ldev;
+ struct sc27xx_led_priv *priv;
+ u8 line;
+ bool active;
+};
+
+struct sc27xx_led_priv {
+ struct sc27xx_led leds[SC27XX_LEDS_MAX];
+ struct regmap *regmap;
+ struct mutex lock;
+ u32 base;
+};
+
+#define to_sc27xx_led(ldev) \
+ container_of(ldev, struct sc27xx_led, ldev)
+
+static int sc27xx_led_init(struct regmap *regmap)
+{
+ int err;
+
+ err = regmap_update_bits(regmap, SC27XX_MODULE_EN0, SC27XX_BLTC_EN,
+ SC27XX_BLTC_EN);
+ if (err)
+ return err;
+
+ err = regmap_update_bits(regmap, SC27XX_CLK_EN0, SC27XX_RTC_EN,
+ SC27XX_RTC_EN);
+ if (err)
+ return err;
+
+ return regmap_update_bits(regmap, SC27XX_RGB_CTRL, SC27XX_RGB_PD, 0);
+}
+
+static u32 sc27xx_led_get_offset(struct sc27xx_led *leds)
+{
+ return leds->priv->base + SC27XX_LEDS_OFFSET * leds->line;
+}
+
+static int sc27xx_led_enable(struct sc27xx_led *leds, enum led_brightness value)
+{
+ u32 base = sc27xx_led_get_offset(leds);
+ u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
+ u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
+ struct regmap *regmap = leds->priv->regmap;
+ int err;
+
+ err = regmap_update_bits(regmap, base + SC27XX_LEDS_DUTY,
+ SC27XX_DUTY_MASK,
+ (value << SC27XX_DUTY_SHIFT) |
+ SC27XX_MOD_MASK);
+ if (err)
+ return err;
+
+ return regmap_update_bits(regmap, ctrl_base,
+ (SC27XX_LED_RUN | SC27XX_LED_TYPE) << ctrl_shift,
+ (SC27XX_LED_RUN | SC27XX_LED_TYPE) << ctrl_shift);
+}
+
+static int sc27xx_led_disable(struct sc27xx_led *leds)
+{
+ struct regmap *regmap = leds->priv->regmap;
+ u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
+ u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
+
+ return regmap_update_bits(regmap, ctrl_base,
+ (SC27XX_LED_RUN | SC27XX_LED_TYPE) << ctrl_shift, 0);
+}
+
+static int sc27xx_led_set(struct led_classdev *ldev, enum led_brightness value)
+{
+ struct sc27xx_led *leds = to_sc27xx_led(ldev);
+ int err;
+
+ mutex_lock(&leds->priv->lock);
+
+ if (value == LED_OFF)
+ err = sc27xx_led_disable(leds);
+ else
+ err = sc27xx_led_enable(leds, value);
+
+ mutex_unlock(&leds->priv->lock);
+
+ return err;
+}
+
+static void sc27xx_led_clamp_align_delta_t(u32 *delta_t)
+{
+ u32 v, offset, t = *delta_t;
+
+ v = t + SC27XX_LEDS_STEP / 2;
+ v = clamp_t(u32, v, SC27XX_DELTA_T_MIN, SC27XX_DELTA_T_MAX);
+ offset = v - SC27XX_DELTA_T_MIN;
+ offset = SC27XX_LEDS_STEP * (offset / SC27XX_LEDS_STEP);
+
+ *delta_t = SC27XX_DELTA_T_MIN + offset;
+}
+
+static int sc27xx_led_pattern_clear(struct led_classdev *ldev)
+{
+ struct sc27xx_led *leds = to_sc27xx_led(ldev);
+ struct regmap *regmap = leds->priv->regmap;
+ u32 base = sc27xx_led_get_offset(leds);
+ u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
+ u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
+ int err;
+
+ mutex_lock(&leds->priv->lock);
+
+ /* Reset the rise, high, fall and low time to zero. */
+ regmap_write(regmap, base + SC27XX_LEDS_CURVE0, 0);
+ regmap_write(regmap, base + SC27XX_LEDS_CURVE1, 0);
+
+ err = regmap_update_bits(regmap, ctrl_base,
+ (SC27XX_LED_RUN | SC27XX_LED_TYPE) << ctrl_shift, 0);
+
+ ldev->brightness = LED_OFF;
+
+ mutex_unlock(&leds->priv->lock);
+
+ return err;
+}
+
+static int sc27xx_led_pattern_set(struct led_classdev *ldev,
+ struct led_pattern *pattern,
+ u32 len, int repeat)
+{
+ struct sc27xx_led *leds = to_sc27xx_led(ldev);
+ u32 base = sc27xx_led_get_offset(leds);
+ u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
+ u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
+ struct regmap *regmap = leds->priv->regmap;
+ int err;
+
+ /*
+ * Must contain 4 tuples to configure the rise time, high time, fall
+ * time and low time to enable the breathing mode.
+ */
+ if (len != SC27XX_LEDS_PATTERN_CNT)
+ return -EINVAL;
+
+ mutex_lock(&leds->priv->lock);
+
+ sc27xx_led_clamp_align_delta_t(&pattern[0].delta_t);
+ err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE0,
+ SC27XX_CURVE_L_MASK,
+ pattern[0].delta_t / SC27XX_LEDS_STEP);
+ if (err)
+ goto out;
+
+ sc27xx_led_clamp_align_delta_t(&pattern[1].delta_t);
+ err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE1,
+ SC27XX_CURVE_L_MASK,
+ pattern[1].delta_t / SC27XX_LEDS_STEP);
+ if (err)
+ goto out;
+
+ sc27xx_led_clamp_align_delta_t(&pattern[2].delta_t);
+ err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE0,
+ SC27XX_CURVE_H_MASK,
+ (pattern[2].delta_t / SC27XX_LEDS_STEP) <<
+ SC27XX_CURVE_SHIFT);
+ if (err)
+ goto out;
+
+ sc27xx_led_clamp_align_delta_t(&pattern[3].delta_t);
+ err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE1,
+ SC27XX_CURVE_H_MASK,
+ (pattern[3].delta_t / SC27XX_LEDS_STEP) <<
+ SC27XX_CURVE_SHIFT);
+ if (err)
+ goto out;
+
+ err = regmap_update_bits(regmap, base + SC27XX_LEDS_DUTY,
+ SC27XX_DUTY_MASK,
+ (pattern[1].brightness << SC27XX_DUTY_SHIFT) |
+ SC27XX_MOD_MASK);
+ if (err)
+ goto out;
+
+ /* Enable the LED breathing mode */
+ err = regmap_update_bits(regmap, ctrl_base,
+ SC27XX_LED_RUN << ctrl_shift,
+ SC27XX_LED_RUN << ctrl_shift);
+ if (!err)
+ ldev->brightness = pattern[1].brightness;
+
+out:
+ mutex_unlock(&leds->priv->lock);
+
+ return err;
+}
+
+static int sc27xx_led_register(struct device *dev, struct sc27xx_led_priv *priv)
+{
+ int i, err;
+
+ err = sc27xx_led_init(priv->regmap);
+ if (err)
+ return err;
+
+ for (i = 0; i < SC27XX_LEDS_MAX; i++) {
+ struct sc27xx_led *led = &priv->leds[i];
+ struct led_init_data init_data = {};
+
+ if (!led->active)
+ continue;
+
+ led->line = i;
+ led->priv = priv;
+ led->ldev.brightness_set_blocking = sc27xx_led_set;
+ led->ldev.pattern_set = sc27xx_led_pattern_set;
+ led->ldev.pattern_clear = sc27xx_led_pattern_clear;
+ led->ldev.default_trigger = "pattern";
+
+ init_data.fwnode = led->fwnode;
+ init_data.devicename = "sc27xx";
+ init_data.default_label = ":";
+
+ err = devm_led_classdev_register_ext(dev, &led->ldev,
+ &init_data);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int sc27xx_led_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev_of_node(dev), *child;
+ struct sc27xx_led_priv *priv;
+ u32 base, count, reg;
+ int err;
+
+ count = of_get_available_child_count(np);
+ if (!count || count > SC27XX_LEDS_MAX)
+ return -EINVAL;
+
+ err = of_property_read_u32(np, "reg", &base);
+ if (err) {
+ dev_err(dev, "fail to get reg of property\n");
+ return err;
+ }
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, priv);
+ mutex_init(&priv->lock);
+ priv->base = base;
+ priv->regmap = dev_get_regmap(dev->parent, NULL);
+ if (!priv->regmap) {
+ err = -ENODEV;
+ dev_err(dev, "failed to get regmap: %d\n", err);
+ return err;
+ }
+
+ for_each_available_child_of_node(np, child) {
+ err = of_property_read_u32(child, "reg", &reg);
+ if (err) {
+ of_node_put(child);
+ mutex_destroy(&priv->lock);
+ return err;
+ }
+
+ if (reg >= SC27XX_LEDS_MAX || priv->leds[reg].active) {
+ of_node_put(child);
+ mutex_destroy(&priv->lock);
+ return -EINVAL;
+ }
+
+ priv->leds[reg].fwnode = of_fwnode_handle(child);
+ priv->leds[reg].active = true;
+ }
+
+ err = sc27xx_led_register(dev, priv);
+ if (err)
+ mutex_destroy(&priv->lock);
+
+ return err;
+}
+
+static int sc27xx_led_remove(struct platform_device *pdev)
+{
+ struct sc27xx_led_priv *priv = platform_get_drvdata(pdev);
+
+ mutex_destroy(&priv->lock);
+ return 0;
+}
+
+static const struct of_device_id sc27xx_led_of_match[] = {
+ { .compatible = "sprd,sc2731-bltc", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sc27xx_led_of_match);
+
+static struct platform_driver sc27xx_led_driver = {
+ .driver = {
+ .name = "sprd-bltc",
+ .of_match_table = sc27xx_led_of_match,
+ },
+ .probe = sc27xx_led_probe,
+ .remove = sc27xx_led_remove,
+};
+
+module_platform_driver(sc27xx_led_driver);
+
+MODULE_DESCRIPTION("Spreadtrum SC27xx breathing light controller driver");
+MODULE_AUTHOR("Xiaotong Lu <xiaotong.lu@spreadtrum.com>");
+MODULE_AUTHOR("Baolin Wang <baolin.wang@linaro.org>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-spi-byte.c b/drivers/leds/leds-spi-byte.c
new file mode 100644
index 000000000..2bc5c99da
--- /dev/null
+++ b/drivers/leds/leds-spi-byte.c
@@ -0,0 +1,154 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2019 Christian Mauderer <oss@c-mauderer.de>
+
+/*
+ * The driver supports controllers with a very simple SPI protocol:
+ * - one LED is controlled by a single byte on MOSI
+ * - the value of the byte gives the brightness between two values (lowest to
+ * highest)
+ * - no return value is necessary (no MISO signal)
+ *
+ * The value for minimum and maximum brightness depends on the device
+ * (compatible string).
+ *
+ * Supported devices:
+ * - "ubnt,acb-spi-led": Microcontroller (SONiX 8F26E611LA) based device used
+ * for example in Ubiquiti airCube ISP. Reverse engineered protocol for this
+ * controller:
+ * * Higher two bits set a mode. Lower six bits are a parameter.
+ * * Mode: 00 -> set brightness between 0x00 (min) and 0x3F (max)
+ * * Mode: 01 -> pulsing pattern (min -> max -> min) with an interval. From
+ * some tests, the period is about (50ms + 102ms * parameter). There is a
+ * slightly different pattern starting from 0x10 (longer gap between the
+ * pulses) but the time still follows that calculation.
+ * * Mode: 10 -> same as 01 but with only a ramp from min to max. Again a
+ * slight jump in the pattern at 0x10.
+ * * Mode: 11 -> blinking (off -> 25% -> off -> 25% -> ...) with a period of
+ * (105ms * parameter)
+ * NOTE: This driver currently only supports mode 00.
+ */
+
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/spi/spi.h>
+#include <linux/mutex.h>
+#include <uapi/linux/uleds.h>
+
+struct spi_byte_chipdef {
+ /* SPI byte that will be send to switch the LED off */
+ u8 off_value;
+ /* SPI byte that will be send to switch the LED to maximum brightness */
+ u8 max_value;
+};
+
+struct spi_byte_led {
+ struct led_classdev ldev;
+ struct spi_device *spi;
+ char name[LED_MAX_NAME_SIZE];
+ struct mutex mutex;
+ const struct spi_byte_chipdef *cdef;
+};
+
+static const struct spi_byte_chipdef ubnt_acb_spi_led_cdef = {
+ .off_value = 0x0,
+ .max_value = 0x3F,
+};
+
+static const struct of_device_id spi_byte_dt_ids[] = {
+ { .compatible = "ubnt,acb-spi-led", .data = &ubnt_acb_spi_led_cdef },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, spi_byte_dt_ids);
+
+static int spi_byte_brightness_set_blocking(struct led_classdev *dev,
+ enum led_brightness brightness)
+{
+ struct spi_byte_led *led = container_of(dev, struct spi_byte_led, ldev);
+ u8 value;
+ int ret;
+
+ value = (u8) brightness + led->cdef->off_value;
+
+ mutex_lock(&led->mutex);
+ ret = spi_write(led->spi, &value, sizeof(value));
+ mutex_unlock(&led->mutex);
+
+ return ret;
+}
+
+static int spi_byte_probe(struct spi_device *spi)
+{
+ struct device_node *child;
+ struct device *dev = &spi->dev;
+ struct spi_byte_led *led;
+ const char *name = "leds-spi-byte::";
+ const char *state;
+ int ret;
+
+ if (of_get_available_child_count(dev_of_node(dev)) != 1) {
+ dev_err(dev, "Device must have exactly one LED sub-node.");
+ return -EINVAL;
+ }
+ child = of_get_next_available_child(dev_of_node(dev), NULL);
+
+ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ of_property_read_string(child, "label", &name);
+ strlcpy(led->name, name, sizeof(led->name));
+ led->spi = spi;
+ mutex_init(&led->mutex);
+ led->cdef = device_get_match_data(dev);
+ led->ldev.name = led->name;
+ led->ldev.brightness = LED_OFF;
+ led->ldev.max_brightness = led->cdef->max_value - led->cdef->off_value;
+ led->ldev.brightness_set_blocking = spi_byte_brightness_set_blocking;
+
+ state = of_get_property(child, "default-state", NULL);
+ if (state) {
+ if (!strcmp(state, "on")) {
+ led->ldev.brightness = led->ldev.max_brightness;
+ } else if (strcmp(state, "off")) {
+ /* all other cases except "off" */
+ dev_err(dev, "default-state can only be 'on' or 'off'");
+ return -EINVAL;
+ }
+ }
+ spi_byte_brightness_set_blocking(&led->ldev,
+ led->ldev.brightness);
+
+ ret = devm_led_classdev_register(&spi->dev, &led->ldev);
+ if (ret) {
+ mutex_destroy(&led->mutex);
+ return ret;
+ }
+ spi_set_drvdata(spi, led);
+
+ return 0;
+}
+
+static void spi_byte_remove(struct spi_device *spi)
+{
+ struct spi_byte_led *led = spi_get_drvdata(spi);
+
+ mutex_destroy(&led->mutex);
+}
+
+static struct spi_driver spi_byte_driver = {
+ .probe = spi_byte_probe,
+ .remove = spi_byte_remove,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .of_match_table = spi_byte_dt_ids,
+ },
+};
+
+module_spi_driver(spi_byte_driver);
+
+MODULE_AUTHOR("Christian Mauderer <oss@c-mauderer.de>");
+MODULE_DESCRIPTION("single byte SPI LED driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:leds-spi-byte");
diff --git a/drivers/leds/leds-ss4200.c b/drivers/leds/leds-ss4200.c
new file mode 100644
index 000000000..fcaa34706
--- /dev/null
+++ b/drivers/leds/leds-ss4200.c
@@ -0,0 +1,557 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * SS4200-E Hardware API
+ * Copyright (c) 2009, Intel Corporation.
+ * Copyright IBM Corporation, 2009
+ *
+ * Author: Dave Hansen <dave@sr71.net>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/dmi.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+
+MODULE_AUTHOR("Rodney Girod <rgirod@confocus.com>, Dave Hansen <dave@sr71.net>");
+MODULE_DESCRIPTION("Intel NAS/Home Server ICH7 GPIO Driver");
+MODULE_LICENSE("GPL");
+
+/*
+ * ICH7 LPC/GPIO PCI Config register offsets
+ */
+#define PMBASE 0x040
+#define GPIO_BASE 0x048
+#define GPIO_CTRL 0x04c
+#define GPIO_EN 0x010
+
+/*
+ * The ICH7 GPIO register block is 64 bytes in size.
+ */
+#define ICH7_GPIO_SIZE 64
+
+/*
+ * Define register offsets within the ICH7 register block.
+ */
+#define GPIO_USE_SEL 0x000
+#define GP_IO_SEL 0x004
+#define GP_LVL 0x00c
+#define GPO_BLINK 0x018
+#define GPI_INV 0x030
+#define GPIO_USE_SEL2 0x034
+#define GP_IO_SEL2 0x038
+#define GP_LVL2 0x03c
+
+/*
+ * PCI ID of the Intel ICH7 LPC Device within which the GPIO block lives.
+ */
+static const struct pci_device_id ich7_lpc_pci_id[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0) },
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1) },
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_30) },
+ { } /* NULL entry */
+};
+
+MODULE_DEVICE_TABLE(pci, ich7_lpc_pci_id);
+
+static int __init ss4200_led_dmi_callback(const struct dmi_system_id *id)
+{
+ pr_info("detected '%s'\n", id->ident);
+ return 1;
+}
+
+static bool nodetect;
+module_param_named(nodetect, nodetect, bool, 0);
+MODULE_PARM_DESC(nodetect, "Skip DMI-based hardware detection");
+
+/*
+ * struct nas_led_whitelist - List of known good models
+ *
+ * Contains the known good models this driver is compatible with.
+ * When adding a new model try to be as strict as possible. This
+ * makes it possible to keep the false positives (the model is
+ * detected as working, but in reality it is not) as low as
+ * possible.
+ */
+static const struct dmi_system_id nas_led_whitelist[] __initconst = {
+ {
+ .callback = ss4200_led_dmi_callback,
+ .ident = "Intel SS4200-E",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Intel"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "SS4200-E"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "1.00.00")
+ }
+ },
+ {
+ /*
+ * FUJITSU SIEMENS SCALEO Home Server/SS4200-E
+ * BIOS V090L 12/19/2007
+ */
+ .callback = ss4200_led_dmi_callback,
+ .ident = "Fujitsu Siemens SCALEO Home Server",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "SCALEO Home Server"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "1.00.00")
+ }
+ },
+ {}
+};
+
+/*
+ * Base I/O address assigned to the Power Management register block
+ */
+static u32 g_pm_io_base;
+
+/*
+ * Base I/O address assigned to the ICH7 GPIO register block
+ */
+static u32 nas_gpio_io_base;
+
+/*
+ * When we successfully register a region, we are returned a resource.
+ * We use these to identify which regions we need to release on our way
+ * back out.
+ */
+static struct resource *gp_gpio_resource;
+
+struct nasgpio_led {
+ char *name;
+ u32 gpio_bit;
+ struct led_classdev led_cdev;
+};
+
+/*
+ * gpio_bit(s) are the ICH7 GPIO bit assignments
+ */
+static struct nasgpio_led nasgpio_leds[] = {
+ { .name = "hdd1:blue:sata", .gpio_bit = 0 },
+ { .name = "hdd1:amber:sata", .gpio_bit = 1 },
+ { .name = "hdd2:blue:sata", .gpio_bit = 2 },
+ { .name = "hdd2:amber:sata", .gpio_bit = 3 },
+ { .name = "hdd3:blue:sata", .gpio_bit = 4 },
+ { .name = "hdd3:amber:sata", .gpio_bit = 5 },
+ { .name = "hdd4:blue:sata", .gpio_bit = 6 },
+ { .name = "hdd4:amber:sata", .gpio_bit = 7 },
+ { .name = "power:blue:power", .gpio_bit = 27},
+ { .name = "power:amber:power", .gpio_bit = 28},
+};
+
+#define NAS_RECOVERY 0x00000400 /* GPIO10 */
+
+static struct nasgpio_led *
+led_classdev_to_nasgpio_led(struct led_classdev *led_cdev)
+{
+ return container_of(led_cdev, struct nasgpio_led, led_cdev);
+}
+
+static struct nasgpio_led *get_led_named(char *name)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(nasgpio_leds); i++) {
+ if (strcmp(nasgpio_leds[i].name, name))
+ continue;
+ return &nasgpio_leds[i];
+ }
+ return NULL;
+}
+
+/*
+ * This protects access to the gpio ports.
+ */
+static DEFINE_SPINLOCK(nasgpio_gpio_lock);
+
+/*
+ * There are two gpio ports, one for blinking and the other
+ * for power. @port tells us if we're doing blinking or
+ * power control.
+ *
+ * Caller must hold nasgpio_gpio_lock
+ */
+static void __nasgpio_led_set_attr(struct led_classdev *led_cdev,
+ u32 port, u32 value)
+{
+ struct nasgpio_led *led = led_classdev_to_nasgpio_led(led_cdev);
+ u32 gpio_out;
+
+ gpio_out = inl(nas_gpio_io_base + port);
+ if (value)
+ gpio_out |= (1<<led->gpio_bit);
+ else
+ gpio_out &= ~(1<<led->gpio_bit);
+
+ outl(gpio_out, nas_gpio_io_base + port);
+}
+
+static void nasgpio_led_set_attr(struct led_classdev *led_cdev,
+ u32 port, u32 value)
+{
+ spin_lock(&nasgpio_gpio_lock);
+ __nasgpio_led_set_attr(led_cdev, port, value);
+ spin_unlock(&nasgpio_gpio_lock);
+}
+
+static u32 nasgpio_led_get_attr(struct led_classdev *led_cdev, u32 port)
+{
+ struct nasgpio_led *led = led_classdev_to_nasgpio_led(led_cdev);
+ u32 gpio_in;
+
+ spin_lock(&nasgpio_gpio_lock);
+ gpio_in = inl(nas_gpio_io_base + port);
+ spin_unlock(&nasgpio_gpio_lock);
+ if (gpio_in & (1<<led->gpio_bit))
+ return 1;
+ return 0;
+}
+
+/*
+ * There is actual brightness control in the hardware,
+ * but it is via smbus commands and not implemented
+ * in this driver.
+ */
+static void nasgpio_led_set_brightness(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ u32 setting = 0;
+ if (brightness >= LED_HALF)
+ setting = 1;
+ /*
+ * Hold the lock across both operations. This ensures
+ * consistency so that both the "turn off blinking"
+ * and "turn light off" operations complete as a set.
+ */
+ spin_lock(&nasgpio_gpio_lock);
+ /*
+ * LED class documentation asks that past blink state
+ * be disabled when brightness is turned to zero.
+ */
+ if (brightness == 0)
+ __nasgpio_led_set_attr(led_cdev, GPO_BLINK, 0);
+ __nasgpio_led_set_attr(led_cdev, GP_LVL, setting);
+ spin_unlock(&nasgpio_gpio_lock);
+}
+
+static int nasgpio_led_set_blink(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ u32 setting = 1;
+ if (!(*delay_on == 0 && *delay_off == 0) &&
+ !(*delay_on == 500 && *delay_off == 500))
+ return -EINVAL;
+ /*
+ * These are very approximate.
+ */
+ *delay_on = 500;
+ *delay_off = 500;
+
+ nasgpio_led_set_attr(led_cdev, GPO_BLINK, setting);
+
+ return 0;
+}
+
+
+/*
+ * Initialize the ICH7 GPIO registers for NAS usage. The BIOS should have
+ * already taken care of this, but we will do so in a non destructive manner
+ * so that we have what we need whether the BIOS did it or not.
+ */
+static int ich7_gpio_init(struct device *dev)
+{
+ int i;
+ u32 config_data = 0;
+ u32 all_nas_led = 0;
+
+ for (i = 0; i < ARRAY_SIZE(nasgpio_leds); i++)
+ all_nas_led |= (1<<nasgpio_leds[i].gpio_bit);
+
+ spin_lock(&nasgpio_gpio_lock);
+ /*
+ * We need to enable all of the GPIO lines used by the NAS box,
+ * so we will read the current Use Selection and add our usage
+ * to it. This should be benign with regard to the original
+ * BIOS configuration.
+ */
+ config_data = inl(nas_gpio_io_base + GPIO_USE_SEL);
+ dev_dbg(dev, ": Data read from GPIO_USE_SEL = 0x%08x\n", config_data);
+ config_data |= all_nas_led + NAS_RECOVERY;
+ outl(config_data, nas_gpio_io_base + GPIO_USE_SEL);
+ config_data = inl(nas_gpio_io_base + GPIO_USE_SEL);
+ dev_dbg(dev, ": GPIO_USE_SEL = 0x%08x\n\n", config_data);
+
+ /*
+ * The LED GPIO outputs need to be configured for output, so we
+ * will ensure that all LED lines are cleared for output and the
+ * RECOVERY line ready for input. This too should be benign with
+ * regard to BIOS configuration.
+ */
+ config_data = inl(nas_gpio_io_base + GP_IO_SEL);
+ dev_dbg(dev, ": Data read from GP_IO_SEL = 0x%08x\n",
+ config_data);
+ config_data &= ~all_nas_led;
+ config_data |= NAS_RECOVERY;
+ outl(config_data, nas_gpio_io_base + GP_IO_SEL);
+ config_data = inl(nas_gpio_io_base + GP_IO_SEL);
+ dev_dbg(dev, ": GP_IO_SEL = 0x%08x\n", config_data);
+
+ /*
+ * In our final system, the BIOS will initialize the state of all
+ * of the LEDs. For now, we turn them all off (or Low).
+ */
+ config_data = inl(nas_gpio_io_base + GP_LVL);
+ dev_dbg(dev, ": Data read from GP_LVL = 0x%08x\n", config_data);
+ /*
+ * In our final system, the BIOS will initialize the blink state of all
+ * of the LEDs. For now, we turn blink off for all of them.
+ */
+ config_data = inl(nas_gpio_io_base + GPO_BLINK);
+ dev_dbg(dev, ": Data read from GPO_BLINK = 0x%08x\n", config_data);
+
+ /*
+ * At this moment, I am unsure if anything needs to happen with GPI_INV
+ */
+ config_data = inl(nas_gpio_io_base + GPI_INV);
+ dev_dbg(dev, ": Data read from GPI_INV = 0x%08x\n", config_data);
+
+ spin_unlock(&nasgpio_gpio_lock);
+ return 0;
+}
+
+static void ich7_lpc_cleanup(struct device *dev)
+{
+ /*
+ * If we were given exclusive use of the GPIO
+ * I/O Address range, we must return it.
+ */
+ if (gp_gpio_resource) {
+ dev_dbg(dev, ": Releasing GPIO I/O addresses\n");
+ release_region(nas_gpio_io_base, ICH7_GPIO_SIZE);
+ gp_gpio_resource = NULL;
+ }
+}
+
+/*
+ * The OS has determined that the LPC of the Intel ICH7 Southbridge is present
+ * so we can retrive the required operational information and prepare the GPIO.
+ */
+static struct pci_dev *nas_gpio_pci_dev;
+static int ich7_lpc_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
+{
+ int status;
+ u32 gc = 0;
+
+ status = pci_enable_device(dev);
+ if (status) {
+ dev_err(&dev->dev, "pci_enable_device failed\n");
+ return -EIO;
+ }
+
+ nas_gpio_pci_dev = dev;
+ status = pci_read_config_dword(dev, PMBASE, &g_pm_io_base);
+ if (status)
+ goto out;
+ g_pm_io_base &= 0x00000ff80;
+
+ status = pci_read_config_dword(dev, GPIO_CTRL, &gc);
+ if (!(GPIO_EN & gc)) {
+ status = -EEXIST;
+ dev_info(&dev->dev,
+ "ERROR: The LPC GPIO Block has not been enabled.\n");
+ goto out;
+ }
+
+ status = pci_read_config_dword(dev, GPIO_BASE, &nas_gpio_io_base);
+ if (0 > status) {
+ dev_info(&dev->dev, "Unable to read GPIOBASE.\n");
+ goto out;
+ }
+ dev_dbg(&dev->dev, ": GPIOBASE = 0x%08x\n", nas_gpio_io_base);
+ nas_gpio_io_base &= 0x00000ffc0;
+
+ /*
+ * Insure that we have exclusive access to the GPIO I/O address range.
+ */
+ gp_gpio_resource = request_region(nas_gpio_io_base, ICH7_GPIO_SIZE,
+ KBUILD_MODNAME);
+ if (NULL == gp_gpio_resource) {
+ dev_info(&dev->dev,
+ "ERROR Unable to register GPIO I/O addresses.\n");
+ status = -1;
+ goto out;
+ }
+
+ /*
+ * Initialize the GPIO for NAS/Home Server Use
+ */
+ ich7_gpio_init(&dev->dev);
+
+out:
+ if (status) {
+ ich7_lpc_cleanup(&dev->dev);
+ pci_disable_device(dev);
+ }
+ return status;
+}
+
+static void ich7_lpc_remove(struct pci_dev *dev)
+{
+ ich7_lpc_cleanup(&dev->dev);
+ pci_disable_device(dev);
+}
+
+/*
+ * pci_driver structure passed to the PCI modules
+ */
+static struct pci_driver nas_gpio_pci_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = ich7_lpc_pci_id,
+ .probe = ich7_lpc_probe,
+ .remove = ich7_lpc_remove,
+};
+
+static struct led_classdev *get_classdev_for_led_nr(int nr)
+{
+ struct nasgpio_led *nas_led = &nasgpio_leds[nr];
+ struct led_classdev *led = &nas_led->led_cdev;
+ return led;
+}
+
+
+static void set_power_light_amber_noblink(void)
+{
+ struct nasgpio_led *amber = get_led_named("power:amber:power");
+ struct nasgpio_led *blue = get_led_named("power:blue:power");
+
+ if (!amber || !blue)
+ return;
+ /*
+ * LED_OFF implies disabling future blinking
+ */
+ pr_debug("setting blue off and amber on\n");
+
+ nasgpio_led_set_brightness(&blue->led_cdev, LED_OFF);
+ nasgpio_led_set_brightness(&amber->led_cdev, LED_FULL);
+}
+
+static ssize_t blink_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led = dev_get_drvdata(dev);
+ int blinking = 0;
+ if (nasgpio_led_get_attr(led, GPO_BLINK))
+ blinking = 1;
+ return sprintf(buf, "%u\n", blinking);
+}
+
+static ssize_t blink_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ int ret;
+ struct led_classdev *led = dev_get_drvdata(dev);
+ unsigned long blink_state;
+
+ ret = kstrtoul(buf, 10, &blink_state);
+ if (ret)
+ return ret;
+
+ nasgpio_led_set_attr(led, GPO_BLINK, blink_state);
+
+ return size;
+}
+
+static DEVICE_ATTR_RW(blink);
+
+static struct attribute *nasgpio_led_attrs[] = {
+ &dev_attr_blink.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(nasgpio_led);
+
+static int register_nasgpio_led(int led_nr)
+{
+ struct nasgpio_led *nas_led = &nasgpio_leds[led_nr];
+ struct led_classdev *led = get_classdev_for_led_nr(led_nr);
+
+ led->name = nas_led->name;
+ led->brightness = LED_OFF;
+ if (nasgpio_led_get_attr(led, GP_LVL))
+ led->brightness = LED_FULL;
+ led->brightness_set = nasgpio_led_set_brightness;
+ led->blink_set = nasgpio_led_set_blink;
+ led->groups = nasgpio_led_groups;
+
+ return led_classdev_register(&nas_gpio_pci_dev->dev, led);
+}
+
+static void unregister_nasgpio_led(int led_nr)
+{
+ struct led_classdev *led = get_classdev_for_led_nr(led_nr);
+ led_classdev_unregister(led);
+}
+/*
+ * module load/initialization
+ */
+static int __init nas_gpio_init(void)
+{
+ int i;
+ int ret = 0;
+ int nr_devices = 0;
+
+ nr_devices = dmi_check_system(nas_led_whitelist);
+ if (nodetect) {
+ pr_info("skipping hardware autodetection\n");
+ pr_info("Please send 'dmidecode' output to dave@sr71.net\n");
+ nr_devices++;
+ }
+
+ if (nr_devices <= 0) {
+ pr_info("no LED devices found\n");
+ return -ENODEV;
+ }
+
+ pr_info("registering PCI driver\n");
+ ret = pci_register_driver(&nas_gpio_pci_driver);
+ if (ret)
+ return ret;
+ for (i = 0; i < ARRAY_SIZE(nasgpio_leds); i++) {
+ ret = register_nasgpio_led(i);
+ if (ret)
+ goto out_err;
+ }
+ /*
+ * When the system powers on, the BIOS leaves the power
+ * light blue and blinking. This will turn it solid
+ * amber once the driver is loaded.
+ */
+ set_power_light_amber_noblink();
+ return 0;
+out_err:
+ for (i--; i >= 0; i--)
+ unregister_nasgpio_led(i);
+ pci_unregister_driver(&nas_gpio_pci_driver);
+ return ret;
+}
+
+/*
+ * module unload
+ */
+static void __exit nas_gpio_exit(void)
+{
+ int i;
+ pr_info("Unregistering driver\n");
+ for (i = 0; i < ARRAY_SIZE(nasgpio_leds); i++)
+ unregister_nasgpio_led(i);
+ pci_unregister_driver(&nas_gpio_pci_driver);
+}
+
+module_init(nas_gpio_init);
+module_exit(nas_gpio_exit);
diff --git a/drivers/leds/leds-sunfire.c b/drivers/leds/leds-sunfire.c
new file mode 100644
index 000000000..eba731371
--- /dev/null
+++ b/drivers/leds/leds-sunfire.c
@@ -0,0 +1,254 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* leds-sunfire.c: SUNW,Ultra-Enterprise LED driver.
+ *
+ * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <asm/fhc.h>
+#include <asm/upa.h>
+
+MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
+MODULE_DESCRIPTION("Sun Fire LED driver");
+MODULE_LICENSE("GPL");
+
+struct sunfire_led {
+ struct led_classdev led_cdev;
+ void __iomem *reg;
+};
+#define to_sunfire_led(d) container_of(d, struct sunfire_led, led_cdev)
+
+static void __clockboard_set(struct led_classdev *led_cdev,
+ enum led_brightness led_val, u8 bit)
+{
+ struct sunfire_led *p = to_sunfire_led(led_cdev);
+ u8 reg = upa_readb(p->reg);
+
+ switch (bit) {
+ case CLOCK_CTRL_LLED:
+ if (led_val)
+ reg &= ~bit;
+ else
+ reg |= bit;
+ break;
+
+ default:
+ if (led_val)
+ reg |= bit;
+ else
+ reg &= ~bit;
+ break;
+ }
+ upa_writeb(reg, p->reg);
+}
+
+static void clockboard_left_set(struct led_classdev *led_cdev,
+ enum led_brightness led_val)
+{
+ __clockboard_set(led_cdev, led_val, CLOCK_CTRL_LLED);
+}
+
+static void clockboard_middle_set(struct led_classdev *led_cdev,
+ enum led_brightness led_val)
+{
+ __clockboard_set(led_cdev, led_val, CLOCK_CTRL_MLED);
+}
+
+static void clockboard_right_set(struct led_classdev *led_cdev,
+ enum led_brightness led_val)
+{
+ __clockboard_set(led_cdev, led_val, CLOCK_CTRL_RLED);
+}
+
+static void __fhc_set(struct led_classdev *led_cdev,
+ enum led_brightness led_val, u32 bit)
+{
+ struct sunfire_led *p = to_sunfire_led(led_cdev);
+ u32 reg = upa_readl(p->reg);
+
+ switch (bit) {
+ case FHC_CONTROL_LLED:
+ if (led_val)
+ reg &= ~bit;
+ else
+ reg |= bit;
+ break;
+
+ default:
+ if (led_val)
+ reg |= bit;
+ else
+ reg &= ~bit;
+ break;
+ }
+ upa_writel(reg, p->reg);
+}
+
+static void fhc_left_set(struct led_classdev *led_cdev,
+ enum led_brightness led_val)
+{
+ __fhc_set(led_cdev, led_val, FHC_CONTROL_LLED);
+}
+
+static void fhc_middle_set(struct led_classdev *led_cdev,
+ enum led_brightness led_val)
+{
+ __fhc_set(led_cdev, led_val, FHC_CONTROL_MLED);
+}
+
+static void fhc_right_set(struct led_classdev *led_cdev,
+ enum led_brightness led_val)
+{
+ __fhc_set(led_cdev, led_val, FHC_CONTROL_RLED);
+}
+
+typedef void (*set_handler)(struct led_classdev *, enum led_brightness);
+struct led_type {
+ const char *name;
+ set_handler handler;
+ const char *default_trigger;
+};
+
+#define NUM_LEDS_PER_BOARD 3
+struct sunfire_drvdata {
+ struct sunfire_led leds[NUM_LEDS_PER_BOARD];
+};
+
+static int sunfire_led_generic_probe(struct platform_device *pdev,
+ struct led_type *types)
+{
+ struct sunfire_drvdata *p;
+ int i, err;
+
+ if (pdev->num_resources != 1) {
+ dev_err(&pdev->dev, "Wrong number of resources %d, should be 1\n",
+ pdev->num_resources);
+ return -EINVAL;
+ }
+
+ p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ for (i = 0; i < NUM_LEDS_PER_BOARD; i++) {
+ struct led_classdev *lp = &p->leds[i].led_cdev;
+
+ p->leds[i].reg = (void __iomem *) pdev->resource[0].start;
+ lp->name = types[i].name;
+ lp->brightness = LED_FULL;
+ lp->brightness_set = types[i].handler;
+ lp->default_trigger = types[i].default_trigger;
+
+ err = led_classdev_register(&pdev->dev, lp);
+ if (err) {
+ dev_err(&pdev->dev, "Could not register %s LED\n",
+ lp->name);
+ for (i--; i >= 0; i--)
+ led_classdev_unregister(&p->leds[i].led_cdev);
+ return err;
+ }
+ }
+
+ platform_set_drvdata(pdev, p);
+
+ return 0;
+}
+
+static int sunfire_led_generic_remove(struct platform_device *pdev)
+{
+ struct sunfire_drvdata *p = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < NUM_LEDS_PER_BOARD; i++)
+ led_classdev_unregister(&p->leds[i].led_cdev);
+
+ return 0;
+}
+
+static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = {
+ {
+ .name = "clockboard-left",
+ .handler = clockboard_left_set,
+ },
+ {
+ .name = "clockboard-middle",
+ .handler = clockboard_middle_set,
+ },
+ {
+ .name = "clockboard-right",
+ .handler = clockboard_right_set,
+ .default_trigger = "heartbeat",
+ },
+};
+
+static int sunfire_clockboard_led_probe(struct platform_device *pdev)
+{
+ return sunfire_led_generic_probe(pdev, clockboard_led_types);
+}
+
+static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = {
+ {
+ .name = "fhc-left",
+ .handler = fhc_left_set,
+ },
+ {
+ .name = "fhc-middle",
+ .handler = fhc_middle_set,
+ },
+ {
+ .name = "fhc-right",
+ .handler = fhc_right_set,
+ .default_trigger = "heartbeat",
+ },
+};
+
+static int sunfire_fhc_led_probe(struct platform_device *pdev)
+{
+ return sunfire_led_generic_probe(pdev, fhc_led_types);
+}
+
+MODULE_ALIAS("platform:sunfire-clockboard-leds");
+MODULE_ALIAS("platform:sunfire-fhc-leds");
+
+static struct platform_driver sunfire_clockboard_led_driver = {
+ .probe = sunfire_clockboard_led_probe,
+ .remove = sunfire_led_generic_remove,
+ .driver = {
+ .name = "sunfire-clockboard-leds",
+ },
+};
+
+static struct platform_driver sunfire_fhc_led_driver = {
+ .probe = sunfire_fhc_led_probe,
+ .remove = sunfire_led_generic_remove,
+ .driver = {
+ .name = "sunfire-fhc-leds",
+ },
+};
+
+static struct platform_driver * const drivers[] = {
+ &sunfire_clockboard_led_driver,
+ &sunfire_fhc_led_driver,
+};
+
+static int __init sunfire_leds_init(void)
+{
+ return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
+}
+
+static void __exit sunfire_leds_exit(void)
+{
+ platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
+}
+
+module_init(sunfire_leds_init);
+module_exit(sunfire_leds_exit);
diff --git a/drivers/leds/leds-syscon.c b/drivers/leds/leds-syscon.c
new file mode 100644
index 000000000..7eddb8ecb
--- /dev/null
+++ b/drivers/leds/leds-syscon.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Generic Syscon LEDs Driver
+ *
+ * Copyright (c) 2014, Linaro Limited
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ */
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/leds.h>
+
+/**
+ * struct syscon_led - state container for syscon based LEDs
+ * @cdev: LED class device for this LED
+ * @map: regmap to access the syscon device backing this LED
+ * @offset: the offset into the syscon regmap for the LED register
+ * @mask: the bit in the register corresponding to the LED
+ * @state: current state of the LED
+ */
+struct syscon_led {
+ struct led_classdev cdev;
+ struct regmap *map;
+ u32 offset;
+ u32 mask;
+ bool state;
+};
+
+static void syscon_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct syscon_led *sled =
+ container_of(led_cdev, struct syscon_led, cdev);
+ u32 val;
+ int ret;
+
+ if (value == LED_OFF) {
+ val = 0;
+ sled->state = false;
+ } else {
+ val = sled->mask;
+ sled->state = true;
+ }
+
+ ret = regmap_update_bits(sled->map, sled->offset, sled->mask, val);
+ if (ret < 0)
+ dev_err(sled->cdev.dev, "error updating LED status\n");
+}
+
+static int syscon_led_probe(struct platform_device *pdev)
+{
+ struct led_init_data init_data = {};
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev_of_node(dev);
+ struct device *parent;
+ struct regmap *map;
+ struct syscon_led *sled;
+ const char *state;
+ int ret;
+
+ parent = dev->parent;
+ if (!parent) {
+ dev_err(dev, "no parent for syscon LED\n");
+ return -ENODEV;
+ }
+ map = syscon_node_to_regmap(dev_of_node(parent));
+ if (IS_ERR(map)) {
+ dev_err(dev, "no regmap for syscon LED parent\n");
+ return PTR_ERR(map);
+ }
+
+ sled = devm_kzalloc(dev, sizeof(*sled), GFP_KERNEL);
+ if (!sled)
+ return -ENOMEM;
+
+ sled->map = map;
+
+ if (of_property_read_u32(np, "offset", &sled->offset))
+ return -EINVAL;
+ if (of_property_read_u32(np, "mask", &sled->mask))
+ return -EINVAL;
+
+ state = of_get_property(np, "default-state", NULL);
+ if (state) {
+ if (!strcmp(state, "keep")) {
+ u32 val;
+
+ ret = regmap_read(map, sled->offset, &val);
+ if (ret < 0)
+ return ret;
+ sled->state = !!(val & sled->mask);
+ } else if (!strcmp(state, "on")) {
+ sled->state = true;
+ ret = regmap_update_bits(map, sled->offset,
+ sled->mask,
+ sled->mask);
+ if (ret < 0)
+ return ret;
+ } else {
+ sled->state = false;
+ ret = regmap_update_bits(map, sled->offset,
+ sled->mask, 0);
+ if (ret < 0)
+ return ret;
+ }
+ }
+ sled->cdev.brightness_set = syscon_led_set;
+
+ init_data.fwnode = of_fwnode_handle(np);
+
+ ret = devm_led_classdev_register_ext(dev, &sled->cdev, &init_data);
+ if (ret < 0)
+ return ret;
+
+ platform_set_drvdata(pdev, sled);
+ dev_info(dev, "registered LED %s\n", sled->cdev.name);
+
+ return 0;
+}
+
+static const struct of_device_id of_syscon_leds_match[] = {
+ { .compatible = "register-bit-led", },
+ {},
+};
+
+static struct platform_driver syscon_led_driver = {
+ .probe = syscon_led_probe,
+ .driver = {
+ .name = "leds-syscon",
+ .of_match_table = of_syscon_leds_match,
+ .suppress_bind_attrs = true,
+ },
+};
+builtin_platform_driver(syscon_led_driver);
diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c
new file mode 100644
index 000000000..62a968613
--- /dev/null
+++ b/drivers/leds/leds-tca6507.c
@@ -0,0 +1,822 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * leds-tca6507
+ *
+ * The TCA6507 is a programmable LED controller that can drive 7
+ * separate lines either by holding them low, or by pulsing them
+ * with modulated width.
+ * The modulation can be varied in a simple pattern to produce a
+ * blink or double-blink.
+ *
+ * This driver can configure each line either as a 'GPIO' which is
+ * out-only (pull-up resistor required) or as an LED with variable
+ * brightness and hardware-assisted blinking.
+ *
+ * Apart from OFF and ON there are three programmable brightness
+ * levels which can be programmed from 0 to 15 and indicate how many
+ * 500usec intervals in each 8msec that the led is 'on'. The levels
+ * are named MASTER, BANK0 and BANK1.
+ *
+ * There are two different blink rates that can be programmed, each
+ * with separate time for rise, on, fall, off and second-off. Thus if
+ * 3 or more different non-trivial rates are required, software must
+ * be used for the extra rates. The two different blink rates must
+ * align with the two levels BANK0 and BANK1. This driver does not
+ * support double-blink so 'second-off' always matches 'off'.
+ *
+ * Only 16 different times can be programmed in a roughly logarithmic
+ * scale from 64ms to 16320ms. To be precise the possible times are:
+ * 0, 64, 128, 192, 256, 384, 512, 768,
+ * 1024, 1536, 2048, 3072, 4096, 5760, 8128, 16320
+ *
+ * Times that cannot be closely matched with these must be handled in
+ * software. This driver allows 12.5% error in matching.
+ *
+ * This driver does not allow rise/fall rates to be set explicitly.
+ * When trying to match a given 'on' or 'off' period, an appropriate
+ * pair of 'change' and 'hold' times are chosen to get a close match.
+ * If the target delay is even, the 'change' number will be the
+ * smaller; if odd, the 'hold' number will be the smaller.
+
+ * Choosing pairs of delays with 12.5% errors allows us to match
+ * delays in the ranges: 56-72, 112-144, 168-216, 224-27504,
+ * 28560-36720.
+ * 26% of the achievable sums can be matched by multiple pairings.
+ * For example 1536 == 1536+0, 1024+512, or 768+768.
+ * This driver will always choose the pairing with the least
+ * maximum - 768+768 in this case. Other pairings are not available.
+ *
+ * Access to the 3 levels and 2 blinks are on a first-come,
+ * first-served basis. Access can be shared by multiple leds if they
+ * have the same level and either same blink rates, or some don't
+ * blink. When a led changes, it relinquishes access and tries again,
+ * so it might lose access to hardware blink.
+ *
+ * If a blink engine cannot be allocated, software blink is used. If
+ * the desired brightness cannot be allocated, the closest available
+ * non-zero brightness is used. As 'full' is always available, the
+ * worst case would be to have two different blink rates at '1', with
+ * Max at '2', then other leds will have to choose between '2' and
+ * '16'. Hopefully this is not likely.
+ *
+ * Each bank (BANK0 and BANK1) has two usage counts - LEDs using the
+ * brightness and LEDs using the blink. It can only be reprogrammed
+ * when the appropriate counter is zero. The MASTER level has a
+ * single usage count.
+ *
+ * Each LED has programmable 'on' and 'off' time as milliseconds.
+ * With each there is a flag saying if it was explicitly requested or
+ * defaulted. Similarly the banks know if each time was explicit or a
+ * default. Defaults are permitted to be changed freely - they are
+ * not recognised when matching.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/gpio/driver.h>
+#include <linux/property.h>
+#include <linux/workqueue.h>
+
+/* LED select registers determine the source that drives LED outputs */
+#define TCA6507_LS_LED_OFF 0x0 /* Output HI-Z (off) */
+#define TCA6507_LS_LED_OFF1 0x1 /* Output HI-Z (off) - not used */
+#define TCA6507_LS_LED_PWM0 0x2 /* Output LOW with Bank0 rate */
+#define TCA6507_LS_LED_PWM1 0x3 /* Output LOW with Bank1 rate */
+#define TCA6507_LS_LED_ON 0x4 /* Output LOW (on) */
+#define TCA6507_LS_LED_MIR 0x5 /* Output LOW with Master Intensity */
+#define TCA6507_LS_BLINK0 0x6 /* Blink at Bank0 rate */
+#define TCA6507_LS_BLINK1 0x7 /* Blink at Bank1 rate */
+
+struct tca6507_platform_data {
+ struct led_platform_data leds;
+#ifdef CONFIG_GPIOLIB
+ int gpio_base;
+#endif
+};
+
+#define TCA6507_MAKE_GPIO 1
+
+enum {
+ BANK0,
+ BANK1,
+ MASTER,
+};
+static int bank_source[3] = {
+ TCA6507_LS_LED_PWM0,
+ TCA6507_LS_LED_PWM1,
+ TCA6507_LS_LED_MIR,
+};
+static int blink_source[2] = {
+ TCA6507_LS_BLINK0,
+ TCA6507_LS_BLINK1,
+};
+
+/* PWM registers */
+#define TCA6507_REG_CNT 11
+
+/*
+ * 0x00, 0x01, 0x02 encode the TCA6507_LS_* values, each output
+ * owns one bit in each register
+ */
+#define TCA6507_FADE_ON 0x03
+#define TCA6507_FULL_ON 0x04
+#define TCA6507_FADE_OFF 0x05
+#define TCA6507_FIRST_OFF 0x06
+#define TCA6507_SECOND_OFF 0x07
+#define TCA6507_MAX_INTENSITY 0x08
+#define TCA6507_MASTER_INTENSITY 0x09
+#define TCA6507_INITIALIZE 0x0A
+
+#define INIT_CODE 0x8
+
+#define TIMECODES 16
+static int time_codes[TIMECODES] = {
+ 0, 64, 128, 192, 256, 384, 512, 768,
+ 1024, 1536, 2048, 3072, 4096, 5760, 8128, 16320
+};
+
+/* Convert an led.brightness level (0..255) to a TCA6507 level (0..15) */
+static inline int TO_LEVEL(int brightness)
+{
+ return brightness >> 4;
+}
+
+/* ...and convert back */
+static inline int TO_BRIGHT(int level)
+{
+ if (level)
+ return (level << 4) | 0xf;
+ return 0;
+}
+
+#define NUM_LEDS 7
+struct tca6507_chip {
+ int reg_set; /* One bit per register where
+ * a '1' means the register
+ * should be written */
+ u8 reg_file[TCA6507_REG_CNT];
+ /* Bank 2 is Master Intensity and doesn't use times */
+ struct bank {
+ int level;
+ int ontime, offtime;
+ int on_dflt, off_dflt;
+ int time_use, level_use;
+ } bank[3];
+ struct i2c_client *client;
+ struct work_struct work;
+ spinlock_t lock;
+
+ struct tca6507_led {
+ struct tca6507_chip *chip;
+ struct led_classdev led_cdev;
+ int num;
+ int ontime, offtime;
+ int on_dflt, off_dflt;
+ int bank; /* Bank used, or -1 */
+ int blink; /* Set if hardware-blinking */
+ } leds[NUM_LEDS];
+#ifdef CONFIG_GPIOLIB
+ struct gpio_chip gpio;
+ int gpio_map[NUM_LEDS];
+#endif
+};
+
+static const struct i2c_device_id tca6507_id[] = {
+ { "tca6507" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tca6507_id);
+
+static int choose_times(int msec, int *c1p, int *c2p)
+{
+ /*
+ * Choose two timecodes which add to 'msec' as near as
+ * possible. The first returned is the 'on' or 'off' time.
+ * The second is to be used as a 'fade-on' or 'fade-off' time.
+ * If 'msec' is even, the first will not be smaller than the
+ * second. If 'msec' is odd, the first will not be larger
+ * than the second.
+ * If we cannot get a sum within 1/8 of 'msec' fail with
+ * -EINVAL, otherwise return the sum that was achieved, plus 1
+ * if the first is smaller.
+ * If two possibilities are equally good (e.g. 512+0,
+ * 256+256), choose the first pair so there is more
+ * change-time visible (i.e. it is softer).
+ */
+ int c1, c2;
+ int tmax = msec * 9 / 8;
+ int tmin = msec * 7 / 8;
+ int diff = 65536;
+
+ /* We start at '1' to ensure we never even think of choosing a
+ * total time of '0'.
+ */
+ for (c1 = 1; c1 < TIMECODES; c1++) {
+ int t = time_codes[c1];
+ if (t*2 < tmin)
+ continue;
+ if (t > tmax)
+ break;
+ for (c2 = 0; c2 <= c1; c2++) {
+ int tt = t + time_codes[c2];
+ int d;
+ if (tt < tmin)
+ continue;
+ if (tt > tmax)
+ break;
+ /* This works! */
+ d = abs(msec - tt);
+ if (d >= diff)
+ continue;
+ /* Best yet */
+ *c1p = c1;
+ *c2p = c2;
+ diff = d;
+ if (d == 0)
+ return msec;
+ }
+ }
+ if (diff < 65536) {
+ int actual;
+ if (msec & 1) {
+ swap(*c2p, *c1p);
+ }
+ actual = time_codes[*c1p] + time_codes[*c2p];
+ if (*c1p < *c2p)
+ return actual + 1;
+ else
+ return actual;
+ }
+ /* No close match */
+ return -EINVAL;
+}
+
+/*
+ * Update the register file with the appropriate 3-bit state for the
+ * given led.
+ */
+static void set_select(struct tca6507_chip *tca, int led, int val)
+{
+ int mask = (1 << led);
+ int bit;
+
+ for (bit = 0; bit < 3; bit++) {
+ int n = tca->reg_file[bit] & ~mask;
+ if (val & (1 << bit))
+ n |= mask;
+ if (tca->reg_file[bit] != n) {
+ tca->reg_file[bit] = n;
+ tca->reg_set |= (1 << bit);
+ }
+ }
+}
+
+/* Update the register file with the appropriate 4-bit code for one
+ * bank or other. This can be used for timers, for levels, or for
+ * initialization.
+ */
+static void set_code(struct tca6507_chip *tca, int reg, int bank, int new)
+{
+ int mask = 0xF;
+ int n;
+ if (bank) {
+ mask <<= 4;
+ new <<= 4;
+ }
+ n = tca->reg_file[reg] & ~mask;
+ n |= new;
+ if (tca->reg_file[reg] != n) {
+ tca->reg_file[reg] = n;
+ tca->reg_set |= 1 << reg;
+ }
+}
+
+/* Update brightness level. */
+static void set_level(struct tca6507_chip *tca, int bank, int level)
+{
+ switch (bank) {
+ case BANK0:
+ case BANK1:
+ set_code(tca, TCA6507_MAX_INTENSITY, bank, level);
+ break;
+ case MASTER:
+ set_code(tca, TCA6507_MASTER_INTENSITY, 0, level);
+ break;
+ }
+ tca->bank[bank].level = level;
+}
+
+/* Record all relevant time codes for a given bank */
+static void set_times(struct tca6507_chip *tca, int bank)
+{
+ int c1, c2;
+ int result;
+
+ result = choose_times(tca->bank[bank].ontime, &c1, &c2);
+ if (result < 0)
+ return;
+ dev_dbg(&tca->client->dev,
+ "Chose on times %d(%d) %d(%d) for %dms\n",
+ c1, time_codes[c1],
+ c2, time_codes[c2], tca->bank[bank].ontime);
+ set_code(tca, TCA6507_FADE_ON, bank, c2);
+ set_code(tca, TCA6507_FULL_ON, bank, c1);
+ tca->bank[bank].ontime = result;
+
+ result = choose_times(tca->bank[bank].offtime, &c1, &c2);
+ dev_dbg(&tca->client->dev,
+ "Chose off times %d(%d) %d(%d) for %dms\n",
+ c1, time_codes[c1],
+ c2, time_codes[c2], tca->bank[bank].offtime);
+ set_code(tca, TCA6507_FADE_OFF, bank, c2);
+ set_code(tca, TCA6507_FIRST_OFF, bank, c1);
+ set_code(tca, TCA6507_SECOND_OFF, bank, c1);
+ tca->bank[bank].offtime = result;
+
+ set_code(tca, TCA6507_INITIALIZE, bank, INIT_CODE);
+}
+
+/* Write all needed register of tca6507 */
+
+static void tca6507_work(struct work_struct *work)
+{
+ struct tca6507_chip *tca = container_of(work, struct tca6507_chip,
+ work);
+ struct i2c_client *cl = tca->client;
+ int set;
+ u8 file[TCA6507_REG_CNT];
+ int r;
+
+ spin_lock_irq(&tca->lock);
+ set = tca->reg_set;
+ memcpy(file, tca->reg_file, TCA6507_REG_CNT);
+ tca->reg_set = 0;
+ spin_unlock_irq(&tca->lock);
+
+ for (r = 0; r < TCA6507_REG_CNT; r++)
+ if (set & (1<<r))
+ i2c_smbus_write_byte_data(cl, r, file[r]);
+}
+
+static void led_release(struct tca6507_led *led)
+{
+ /* If led owns any resource, release it. */
+ struct tca6507_chip *tca = led->chip;
+ if (led->bank >= 0) {
+ struct bank *b = tca->bank + led->bank;
+ if (led->blink)
+ b->time_use--;
+ b->level_use--;
+ }
+ led->blink = 0;
+ led->bank = -1;
+}
+
+static int led_prepare(struct tca6507_led *led)
+{
+ /* Assign this led to a bank, configuring that bank if
+ * necessary. */
+ int level = TO_LEVEL(led->led_cdev.brightness);
+ struct tca6507_chip *tca = led->chip;
+ int c1, c2;
+ int i;
+ struct bank *b;
+ int need_init = 0;
+
+ led->led_cdev.brightness = TO_BRIGHT(level);
+ if (level == 0) {
+ set_select(tca, led->num, TCA6507_LS_LED_OFF);
+ return 0;
+ }
+
+ if (led->ontime == 0 || led->offtime == 0) {
+ /*
+ * Just set the brightness, choosing first usable
+ * bank. If none perfect, choose best. Count
+ * backwards so we check MASTER bank first to avoid
+ * wasting a timer.
+ */
+ int best = -1;/* full-on */
+ int diff = 15-level;
+
+ if (level == 15) {
+ set_select(tca, led->num, TCA6507_LS_LED_ON);
+ return 0;
+ }
+
+ for (i = MASTER; i >= BANK0; i--) {
+ int d;
+ if (tca->bank[i].level == level ||
+ tca->bank[i].level_use == 0) {
+ best = i;
+ break;
+ }
+ d = abs(level - tca->bank[i].level);
+ if (d < diff) {
+ diff = d;
+ best = i;
+ }
+ }
+ if (best == -1) {
+ /* Best brightness is full-on */
+ set_select(tca, led->num, TCA6507_LS_LED_ON);
+ led->led_cdev.brightness = LED_FULL;
+ return 0;
+ }
+
+ if (!tca->bank[best].level_use)
+ set_level(tca, best, level);
+
+ tca->bank[best].level_use++;
+ led->bank = best;
+ set_select(tca, led->num, bank_source[best]);
+ led->led_cdev.brightness = TO_BRIGHT(tca->bank[best].level);
+ return 0;
+ }
+
+ /*
+ * We have on/off time so we need to try to allocate a timing
+ * bank. First check if times are compatible with hardware
+ * and give up if not.
+ */
+ if (choose_times(led->ontime, &c1, &c2) < 0)
+ return -EINVAL;
+ if (choose_times(led->offtime, &c1, &c2) < 0)
+ return -EINVAL;
+
+ for (i = BANK0; i <= BANK1; i++) {
+ if (tca->bank[i].level_use == 0)
+ /* not in use - it is ours! */
+ break;
+ if (tca->bank[i].level != level)
+ /* Incompatible level - skip */
+ /* FIX: if timer matches we maybe should consider
+ * this anyway...
+ */
+ continue;
+
+ if (tca->bank[i].time_use == 0)
+ /* Timer not in use, and level matches - use it */
+ break;
+
+ if (!(tca->bank[i].on_dflt ||
+ led->on_dflt ||
+ tca->bank[i].ontime == led->ontime))
+ /* on time is incompatible */
+ continue;
+
+ if (!(tca->bank[i].off_dflt ||
+ led->off_dflt ||
+ tca->bank[i].offtime == led->offtime))
+ /* off time is incompatible */
+ continue;
+
+ /* looks like a suitable match */
+ break;
+ }
+
+ if (i > BANK1)
+ /* Nothing matches - how sad */
+ return -EINVAL;
+
+ b = &tca->bank[i];
+ if (b->level_use == 0)
+ set_level(tca, i, level);
+ b->level_use++;
+ led->bank = i;
+
+ if (b->on_dflt ||
+ !led->on_dflt ||
+ b->time_use == 0) {
+ b->ontime = led->ontime;
+ b->on_dflt = led->on_dflt;
+ need_init = 1;
+ }
+
+ if (b->off_dflt ||
+ !led->off_dflt ||
+ b->time_use == 0) {
+ b->offtime = led->offtime;
+ b->off_dflt = led->off_dflt;
+ need_init = 1;
+ }
+
+ if (need_init)
+ set_times(tca, i);
+
+ led->ontime = b->ontime;
+ led->offtime = b->offtime;
+
+ b->time_use++;
+ led->blink = 1;
+ led->led_cdev.brightness = TO_BRIGHT(b->level);
+ set_select(tca, led->num, blink_source[i]);
+ return 0;
+}
+
+static int led_assign(struct tca6507_led *led)
+{
+ struct tca6507_chip *tca = led->chip;
+ int err;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tca->lock, flags);
+ led_release(led);
+ err = led_prepare(led);
+ if (err) {
+ /*
+ * Can only fail on timer setup. In that case we need
+ * to re-establish as steady level.
+ */
+ led->ontime = 0;
+ led->offtime = 0;
+ led_prepare(led);
+ }
+ spin_unlock_irqrestore(&tca->lock, flags);
+
+ if (tca->reg_set)
+ schedule_work(&tca->work);
+ return err;
+}
+
+static void tca6507_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct tca6507_led *led = container_of(led_cdev, struct tca6507_led,
+ led_cdev);
+ led->led_cdev.brightness = brightness;
+ led->ontime = 0;
+ led->offtime = 0;
+ led_assign(led);
+}
+
+static int tca6507_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct tca6507_led *led = container_of(led_cdev, struct tca6507_led,
+ led_cdev);
+
+ if (*delay_on == 0)
+ led->on_dflt = 1;
+ else if (delay_on != &led_cdev->blink_delay_on)
+ led->on_dflt = 0;
+ led->ontime = *delay_on;
+
+ if (*delay_off == 0)
+ led->off_dflt = 1;
+ else if (delay_off != &led_cdev->blink_delay_off)
+ led->off_dflt = 0;
+ led->offtime = *delay_off;
+
+ if (led->ontime == 0)
+ led->ontime = 512;
+ if (led->offtime == 0)
+ led->offtime = 512;
+
+ if (led->led_cdev.brightness == LED_OFF)
+ led->led_cdev.brightness = LED_FULL;
+ if (led_assign(led) < 0) {
+ led->ontime = 0;
+ led->offtime = 0;
+ led->led_cdev.brightness = LED_OFF;
+ return -EINVAL;
+ }
+ *delay_on = led->ontime;
+ *delay_off = led->offtime;
+ return 0;
+}
+
+#ifdef CONFIG_GPIOLIB
+static void tca6507_gpio_set_value(struct gpio_chip *gc,
+ unsigned offset, int val)
+{
+ struct tca6507_chip *tca = gpiochip_get_data(gc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&tca->lock, flags);
+ /*
+ * 'OFF' is floating high, and 'ON' is pulled down, so it has
+ * the inverse sense of 'val'.
+ */
+ set_select(tca, tca->gpio_map[offset],
+ val ? TCA6507_LS_LED_OFF : TCA6507_LS_LED_ON);
+ spin_unlock_irqrestore(&tca->lock, flags);
+ if (tca->reg_set)
+ schedule_work(&tca->work);
+}
+
+static int tca6507_gpio_direction_output(struct gpio_chip *gc,
+ unsigned offset, int val)
+{
+ tca6507_gpio_set_value(gc, offset, val);
+ return 0;
+}
+
+static int tca6507_probe_gpios(struct device *dev,
+ struct tca6507_chip *tca,
+ struct tca6507_platform_data *pdata)
+{
+ int err;
+ int i = 0;
+ int gpios = 0;
+
+ for (i = 0; i < NUM_LEDS; i++)
+ if (pdata->leds.leds[i].name && pdata->leds.leds[i].flags) {
+ /* Configure as a gpio */
+ tca->gpio_map[gpios] = i;
+ gpios++;
+ }
+
+ if (!gpios)
+ return 0;
+
+ tca->gpio.label = "gpio-tca6507";
+ tca->gpio.ngpio = gpios;
+ tca->gpio.base = pdata->gpio_base;
+ tca->gpio.owner = THIS_MODULE;
+ tca->gpio.direction_output = tca6507_gpio_direction_output;
+ tca->gpio.set = tca6507_gpio_set_value;
+ tca->gpio.parent = dev;
+ err = gpiochip_add_data(&tca->gpio, tca);
+ if (err) {
+ tca->gpio.ngpio = 0;
+ return err;
+ }
+ return 0;
+}
+
+static void tca6507_remove_gpio(struct tca6507_chip *tca)
+{
+ if (tca->gpio.ngpio)
+ gpiochip_remove(&tca->gpio);
+}
+#else /* CONFIG_GPIOLIB */
+static int tca6507_probe_gpios(struct device *dev,
+ struct tca6507_chip *tca,
+ struct tca6507_platform_data *pdata)
+{
+ return 0;
+}
+static void tca6507_remove_gpio(struct tca6507_chip *tca)
+{
+}
+#endif /* CONFIG_GPIOLIB */
+
+static struct tca6507_platform_data *
+tca6507_led_dt_init(struct device *dev)
+{
+ struct tca6507_platform_data *pdata;
+ struct fwnode_handle *child;
+ struct led_info *tca_leds;
+ int count;
+
+ count = device_get_child_node_count(dev);
+ if (!count || count > NUM_LEDS)
+ return ERR_PTR(-ENODEV);
+
+ tca_leds = devm_kcalloc(dev, NUM_LEDS, sizeof(struct led_info),
+ GFP_KERNEL);
+ if (!tca_leds)
+ return ERR_PTR(-ENOMEM);
+
+ device_for_each_child_node(dev, child) {
+ struct led_info led;
+ u32 reg;
+ int ret;
+
+ if (fwnode_property_read_string(child, "label", &led.name))
+ led.name = fwnode_get_name(child);
+
+ if (fwnode_property_read_string(child, "linux,default-trigger",
+ &led.default_trigger))
+ led.default_trigger = NULL;
+
+ led.flags = 0;
+ if (fwnode_property_match_string(child, "compatible",
+ "gpio") >= 0)
+ led.flags |= TCA6507_MAKE_GPIO;
+
+ ret = fwnode_property_read_u32(child, "reg", &reg);
+ if (ret || reg >= NUM_LEDS) {
+ fwnode_handle_put(child);
+ return ERR_PTR(ret ? : -EINVAL);
+ }
+
+ tca_leds[reg] = led;
+ }
+
+ pdata = devm_kzalloc(dev, sizeof(struct tca6507_platform_data),
+ GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->leds.leds = tca_leds;
+ pdata->leds.num_leds = NUM_LEDS;
+#ifdef CONFIG_GPIOLIB
+ pdata->gpio_base = -1;
+#endif
+
+ return pdata;
+}
+
+static const struct of_device_id __maybe_unused of_tca6507_leds_match[] = {
+ { .compatible = "ti,tca6507", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_tca6507_leds_match);
+
+static int tca6507_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct i2c_adapter *adapter;
+ struct tca6507_chip *tca;
+ struct tca6507_platform_data *pdata;
+ int err;
+ int i = 0;
+
+ adapter = client->adapter;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
+ return -EIO;
+
+ pdata = tca6507_led_dt_init(dev);
+ if (IS_ERR(pdata)) {
+ dev_err(dev, "Need %d entries in platform-data list\n", NUM_LEDS);
+ return PTR_ERR(pdata);
+ }
+ tca = devm_kzalloc(dev, sizeof(*tca), GFP_KERNEL);
+ if (!tca)
+ return -ENOMEM;
+
+ tca->client = client;
+ INIT_WORK(&tca->work, tca6507_work);
+ spin_lock_init(&tca->lock);
+ i2c_set_clientdata(client, tca);
+
+ for (i = 0; i < NUM_LEDS; i++) {
+ struct tca6507_led *l = tca->leds + i;
+
+ l->chip = tca;
+ l->num = i;
+ if (pdata->leds.leds[i].name && !pdata->leds.leds[i].flags) {
+ l->led_cdev.name = pdata->leds.leds[i].name;
+ l->led_cdev.default_trigger
+ = pdata->leds.leds[i].default_trigger;
+ l->led_cdev.brightness_set = tca6507_brightness_set;
+ l->led_cdev.blink_set = tca6507_blink_set;
+ l->bank = -1;
+ err = led_classdev_register(dev, &l->led_cdev);
+ if (err < 0)
+ goto exit;
+ }
+ }
+ err = tca6507_probe_gpios(dev, tca, pdata);
+ if (err)
+ goto exit;
+ /* set all registers to known state - zero */
+ tca->reg_set = 0x7f;
+ schedule_work(&tca->work);
+
+ return 0;
+exit:
+ while (i--) {
+ if (tca->leds[i].led_cdev.name)
+ led_classdev_unregister(&tca->leds[i].led_cdev);
+ }
+ return err;
+}
+
+static void tca6507_remove(struct i2c_client *client)
+{
+ int i;
+ struct tca6507_chip *tca = i2c_get_clientdata(client);
+ struct tca6507_led *tca_leds = tca->leds;
+
+ for (i = 0; i < NUM_LEDS; i++) {
+ if (tca_leds[i].led_cdev.name)
+ led_classdev_unregister(&tca_leds[i].led_cdev);
+ }
+ tca6507_remove_gpio(tca);
+ cancel_work_sync(&tca->work);
+}
+
+static struct i2c_driver tca6507_driver = {
+ .driver = {
+ .name = "leds-tca6507",
+ .of_match_table = of_match_ptr(of_tca6507_leds_match),
+ },
+ .probe = tca6507_probe,
+ .remove = tca6507_remove,
+ .id_table = tca6507_id,
+};
+
+module_i2c_driver(tca6507_driver);
+
+MODULE_AUTHOR("NeilBrown <neilb@suse.de>");
+MODULE_DESCRIPTION("TCA6507 LED/GPO driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-ti-lmu-common.c b/drivers/leds/leds-ti-lmu-common.c
new file mode 100644
index 000000000..d7f10ad72
--- /dev/null
+++ b/drivers/leds/leds-ti-lmu-common.c
@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright 2015 Texas Instruments
+// Copyright 2018 Sebastian Reichel
+// Copyright 2018 Pavel Machek <pavel@ucw.cz>
+// TI LMU LED common framework, based on previous work from
+// Milo Kim <milo.kim@ti.com>
+
+#include <linux/bitops.h>
+#include <linux/err.h>
+#include <linux/of_device.h>
+
+#include <linux/leds-ti-lmu-common.h>
+
+static const unsigned int ramp_table[16] = {2048, 262000, 524000, 1049000,
+ 2090000, 4194000, 8389000, 16780000, 33550000,
+ 41940000, 50330000, 58720000, 67110000,
+ 83880000, 100660000, 117440000};
+
+static int ti_lmu_common_update_brightness(struct ti_lmu_bank *lmu_bank,
+ int brightness)
+{
+ struct regmap *regmap = lmu_bank->regmap;
+ u8 reg, val;
+ int ret;
+
+ /*
+ * Brightness register update
+ *
+ * 11 bit dimming: update LSB bits and write MSB byte.
+ * MSB brightness should be shifted.
+ * 8 bit dimming: write MSB byte.
+ */
+ if (lmu_bank->max_brightness == MAX_BRIGHTNESS_11BIT) {
+ reg = lmu_bank->lsb_brightness_reg;
+ ret = regmap_update_bits(regmap, reg,
+ LMU_11BIT_LSB_MASK,
+ brightness);
+ if (ret)
+ return ret;
+
+ val = brightness >> LMU_11BIT_MSB_SHIFT;
+ } else {
+ val = brightness;
+ }
+
+ reg = lmu_bank->msb_brightness_reg;
+
+ return regmap_write(regmap, reg, val);
+}
+
+int ti_lmu_common_set_brightness(struct ti_lmu_bank *lmu_bank, int brightness)
+{
+ return ti_lmu_common_update_brightness(lmu_bank, brightness);
+}
+EXPORT_SYMBOL(ti_lmu_common_set_brightness);
+
+static unsigned int ti_lmu_common_convert_ramp_to_index(unsigned int usec)
+{
+ int size = ARRAY_SIZE(ramp_table);
+ int i;
+
+ if (usec <= ramp_table[0])
+ return 0;
+
+ if (usec > ramp_table[size - 1])
+ return size - 1;
+
+ for (i = 1; i < size; i++) {
+ if (usec == ramp_table[i])
+ return i;
+
+ /* Find an approximate index by looking up the table */
+ if (usec > ramp_table[i - 1] && usec < ramp_table[i]) {
+ if (usec - ramp_table[i - 1] < ramp_table[i] - usec)
+ return i - 1;
+ else
+ return i;
+ }
+ }
+
+ return 0;
+}
+
+int ti_lmu_common_set_ramp(struct ti_lmu_bank *lmu_bank)
+{
+ struct regmap *regmap = lmu_bank->regmap;
+ u8 ramp, ramp_up, ramp_down;
+
+ if (lmu_bank->ramp_up_usec == 0 && lmu_bank->ramp_down_usec == 0) {
+ ramp_up = 0;
+ ramp_down = 0;
+ } else {
+ ramp_up = ti_lmu_common_convert_ramp_to_index(lmu_bank->ramp_up_usec);
+ ramp_down = ti_lmu_common_convert_ramp_to_index(lmu_bank->ramp_down_usec);
+ }
+
+ ramp = (ramp_up << 4) | ramp_down;
+
+ return regmap_write(regmap, lmu_bank->runtime_ramp_reg, ramp);
+
+}
+EXPORT_SYMBOL(ti_lmu_common_set_ramp);
+
+int ti_lmu_common_get_ramp_params(struct device *dev,
+ struct fwnode_handle *child,
+ struct ti_lmu_bank *lmu_data)
+{
+ int ret;
+
+ ret = fwnode_property_read_u32(child, "ramp-up-us",
+ &lmu_data->ramp_up_usec);
+ if (ret)
+ dev_warn(dev, "ramp-up-us property missing\n");
+
+
+ ret = fwnode_property_read_u32(child, "ramp-down-us",
+ &lmu_data->ramp_down_usec);
+ if (ret)
+ dev_warn(dev, "ramp-down-us property missing\n");
+
+ return 0;
+}
+EXPORT_SYMBOL(ti_lmu_common_get_ramp_params);
+
+int ti_lmu_common_get_brt_res(struct device *dev, struct fwnode_handle *child,
+ struct ti_lmu_bank *lmu_data)
+{
+ int ret;
+
+ ret = device_property_read_u32(dev, "ti,brightness-resolution",
+ &lmu_data->max_brightness);
+ if (ret)
+ ret = fwnode_property_read_u32(child,
+ "ti,brightness-resolution",
+ &lmu_data->max_brightness);
+ if (lmu_data->max_brightness <= 0) {
+ lmu_data->max_brightness = MAX_BRIGHTNESS_8BIT;
+ return ret;
+ }
+
+ if (lmu_data->max_brightness > MAX_BRIGHTNESS_11BIT)
+ lmu_data->max_brightness = MAX_BRIGHTNESS_11BIT;
+
+
+ return 0;
+}
+EXPORT_SYMBOL(ti_lmu_common_get_brt_res);
+
+MODULE_DESCRIPTION("TI LMU common LED framework");
+MODULE_AUTHOR("Sebastian Reichel");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("ti-lmu-led-common");
diff --git a/drivers/leds/leds-tlc591xx.c b/drivers/leds/leds-tlc591xx.c
new file mode 100644
index 000000000..cb7bd1353
--- /dev/null
+++ b/drivers/leds/leds-tlc591xx.c
@@ -0,0 +1,242 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2014 Belkin Inc.
+ * Copyright 2015 Andrew Lunn <andrew@lunn.ch>
+ */
+
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define TLC591XX_MAX_LEDS 16
+#define TLC591XX_MAX_BRIGHTNESS 256
+
+#define TLC591XX_REG_MODE1 0x00
+#define MODE1_RESPON_ADDR_MASK 0xF0
+#define MODE1_NORMAL_MODE (0 << 4)
+#define MODE1_SPEED_MODE (1 << 4)
+
+#define TLC591XX_REG_MODE2 0x01
+#define MODE2_DIM (0 << 5)
+#define MODE2_BLINK (1 << 5)
+#define MODE2_OCH_STOP (0 << 3)
+#define MODE2_OCH_ACK (1 << 3)
+
+#define TLC591XX_REG_PWM(x) (0x02 + (x))
+
+#define TLC591XX_REG_GRPPWM 0x12
+#define TLC591XX_REG_GRPFREQ 0x13
+
+/* LED Driver Output State, determine the source that drives LED outputs */
+#define LEDOUT_OFF 0x0 /* Output LOW */
+#define LEDOUT_ON 0x1 /* Output HI-Z */
+#define LEDOUT_DIM 0x2 /* Dimming */
+#define LEDOUT_BLINK 0x3 /* Blinking */
+#define LEDOUT_MASK 0x3
+
+#define ldev_to_led(c) container_of(c, struct tlc591xx_led, ldev)
+
+struct tlc591xx_led {
+ bool active;
+ unsigned int led_no;
+ struct led_classdev ldev;
+ struct tlc591xx_priv *priv;
+};
+
+struct tlc591xx_priv {
+ struct tlc591xx_led leds[TLC591XX_MAX_LEDS];
+ struct regmap *regmap;
+ unsigned int reg_ledout_offset;
+};
+
+struct tlc591xx {
+ unsigned int max_leds;
+ unsigned int reg_ledout_offset;
+};
+
+static const struct tlc591xx tlc59116 = {
+ .max_leds = 16,
+ .reg_ledout_offset = 0x14,
+};
+
+static const struct tlc591xx tlc59108 = {
+ .max_leds = 8,
+ .reg_ledout_offset = 0x0c,
+};
+
+static int
+tlc591xx_set_mode(struct regmap *regmap, u8 mode)
+{
+ int err;
+ u8 val;
+
+ err = regmap_write(regmap, TLC591XX_REG_MODE1, MODE1_NORMAL_MODE);
+ if (err)
+ return err;
+
+ val = MODE2_OCH_STOP | mode;
+
+ return regmap_write(regmap, TLC591XX_REG_MODE2, val);
+}
+
+static int
+tlc591xx_set_ledout(struct tlc591xx_priv *priv, struct tlc591xx_led *led,
+ u8 val)
+{
+ unsigned int i = (led->led_no % 4) * 2;
+ unsigned int mask = LEDOUT_MASK << i;
+ unsigned int addr = priv->reg_ledout_offset + (led->led_no >> 2);
+
+ val = val << i;
+
+ return regmap_update_bits(priv->regmap, addr, mask, val);
+}
+
+static int
+tlc591xx_set_pwm(struct tlc591xx_priv *priv, struct tlc591xx_led *led,
+ u8 brightness)
+{
+ u8 pwm = TLC591XX_REG_PWM(led->led_no);
+
+ return regmap_write(priv->regmap, pwm, brightness);
+}
+
+static int
+tlc591xx_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct tlc591xx_led *led = ldev_to_led(led_cdev);
+ struct tlc591xx_priv *priv = led->priv;
+ int err;
+
+ switch ((int)brightness) {
+ case 0:
+ err = tlc591xx_set_ledout(priv, led, LEDOUT_OFF);
+ break;
+ case TLC591XX_MAX_BRIGHTNESS:
+ err = tlc591xx_set_ledout(priv, led, LEDOUT_ON);
+ break;
+ default:
+ err = tlc591xx_set_ledout(priv, led, LEDOUT_DIM);
+ if (!err)
+ err = tlc591xx_set_pwm(priv, led, brightness);
+ }
+
+ return err;
+}
+
+static const struct regmap_config tlc591xx_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0x1e,
+};
+
+static const struct of_device_id of_tlc591xx_leds_match[] = {
+ { .compatible = "ti,tlc59116",
+ .data = &tlc59116 },
+ { .compatible = "ti,tlc59108",
+ .data = &tlc59108 },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_tlc591xx_leds_match);
+
+static int
+tlc591xx_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device_node *np, *child;
+ struct device *dev = &client->dev;
+ const struct tlc591xx *tlc591xx;
+ struct tlc591xx_priv *priv;
+ int err, count, reg;
+
+ np = dev_of_node(dev);
+ if (!np)
+ return -ENODEV;
+
+ tlc591xx = device_get_match_data(dev);
+ if (!tlc591xx)
+ return -ENODEV;
+
+ count = of_get_available_child_count(np);
+ if (!count || count > tlc591xx->max_leds)
+ return -EINVAL;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->regmap = devm_regmap_init_i2c(client, &tlc591xx_regmap);
+ if (IS_ERR(priv->regmap)) {
+ err = PTR_ERR(priv->regmap);
+ dev_err(dev, "Failed to allocate register map: %d\n", err);
+ return err;
+ }
+ priv->reg_ledout_offset = tlc591xx->reg_ledout_offset;
+
+ i2c_set_clientdata(client, priv);
+
+ err = tlc591xx_set_mode(priv->regmap, MODE2_DIM);
+ if (err < 0)
+ return err;
+
+ for_each_available_child_of_node(np, child) {
+ struct tlc591xx_led *led;
+ struct led_init_data init_data = {};
+
+ init_data.fwnode = of_fwnode_handle(child);
+
+ err = of_property_read_u32(child, "reg", &reg);
+ if (err) {
+ of_node_put(child);
+ return err;
+ }
+ if (reg < 0 || reg >= tlc591xx->max_leds ||
+ priv->leds[reg].active) {
+ of_node_put(child);
+ return -EINVAL;
+ }
+ led = &priv->leds[reg];
+
+ led->active = true;
+ led->priv = priv;
+ led->led_no = reg;
+ led->ldev.brightness_set_blocking = tlc591xx_brightness_set;
+ led->ldev.max_brightness = TLC591XX_MAX_BRIGHTNESS;
+ err = devm_led_classdev_register_ext(dev, &led->ldev,
+ &init_data);
+ if (err < 0) {
+ of_node_put(child);
+ return dev_err_probe(dev, err,
+ "couldn't register LED %s\n",
+ led->ldev.name);
+ }
+ }
+ return 0;
+}
+
+static const struct i2c_device_id tlc591xx_id[] = {
+ { "tlc59116" },
+ { "tlc59108" },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, tlc591xx_id);
+
+static struct i2c_driver tlc591xx_driver = {
+ .driver = {
+ .name = "tlc591xx",
+ .of_match_table = of_match_ptr(of_tlc591xx_leds_match),
+ },
+ .probe = tlc591xx_probe,
+ .id_table = tlc591xx_id,
+};
+
+module_i2c_driver(tlc591xx_driver);
+
+MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("TLC591XX LED driver");
diff --git a/drivers/leds/leds-tps6105x.c b/drivers/leds/leds-tps6105x.c
new file mode 100644
index 000000000..09fd88a6c
--- /dev/null
+++ b/drivers/leds/leds-tps6105x.c
@@ -0,0 +1,89 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2019 Sven Van Asbroeck
+ */
+
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/tps6105x.h>
+#include <linux/regmap.h>
+
+struct tps6105x_priv {
+ struct regmap *regmap;
+ struct led_classdev cdev;
+ struct fwnode_handle *fwnode;
+};
+
+static void tps6105x_handle_put(void *data)
+{
+ struct tps6105x_priv *priv = data;
+
+ fwnode_handle_put(priv->fwnode);
+}
+
+static int tps6105x_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct tps6105x_priv *priv = container_of(cdev, struct tps6105x_priv,
+ cdev);
+
+ return regmap_update_bits(priv->regmap, TPS6105X_REG_0,
+ TPS6105X_REG0_TORCHC_MASK,
+ brightness << TPS6105X_REG0_TORCHC_SHIFT);
+}
+
+static int tps6105x_led_probe(struct platform_device *pdev)
+{
+ struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
+ struct tps6105x_platform_data *pdata = tps6105x->pdata;
+ struct led_init_data init_data = { };
+ struct tps6105x_priv *priv;
+ int ret;
+
+ /* This instance is not set for torch mode so bail out */
+ if (pdata->mode != TPS6105X_MODE_TORCH) {
+ dev_info(&pdev->dev,
+ "chip not in torch mode, exit probe");
+ return -EINVAL;
+ }
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ /* fwnode/devicetree is optional. NULL is allowed for priv->fwnode */
+ priv->fwnode = device_get_next_child_node(pdev->dev.parent, NULL);
+ ret = devm_add_action_or_reset(&pdev->dev, tps6105x_handle_put, priv);
+ if (ret)
+ return ret;
+ priv->regmap = tps6105x->regmap;
+ priv->cdev.brightness_set_blocking = tps6105x_brightness_set;
+ priv->cdev.max_brightness = 7;
+ init_data.devicename = "tps6105x";
+ init_data.default_label = ":torch";
+ init_data.fwnode = priv->fwnode;
+
+ ret = regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
+ TPS6105X_REG0_MODE_MASK |
+ TPS6105X_REG0_TORCHC_MASK,
+ TPS6105X_REG0_MODE_TORCH <<
+ TPS6105X_REG0_MODE_SHIFT);
+ if (ret)
+ return ret;
+
+ return devm_led_classdev_register_ext(&pdev->dev, &priv->cdev,
+ &init_data);
+}
+
+static struct platform_driver led_driver = {
+ .probe = tps6105x_led_probe,
+ .driver = {
+ .name = "tps6105x-leds",
+ },
+};
+
+module_platform_driver(led_driver);
+
+MODULE_DESCRIPTION("TPS6105x LED driver");
+MODULE_AUTHOR("Sven Van Asbroeck <TheSven73@gmail.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-turris-omnia.c b/drivers/leds/leds-turris-omnia.c
new file mode 100644
index 000000000..179eb243d
--- /dev/null
+++ b/drivers/leds/leds-turris-omnia.c
@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CZ.NIC's Turris Omnia LEDs driver
+ *
+ * 2020, 2023 by Marek Behún <kabel@kernel.org>
+ */
+
+#include <linux/i2c.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include "leds.h"
+
+#define OMNIA_BOARD_LEDS 12
+#define OMNIA_LED_NUM_CHANNELS 3
+
+#define CMD_LED_MODE 3
+#define CMD_LED_MODE_LED(l) ((l) & 0x0f)
+#define CMD_LED_MODE_USER 0x10
+
+#define CMD_LED_STATE 4
+#define CMD_LED_STATE_LED(l) ((l) & 0x0f)
+#define CMD_LED_STATE_ON 0x10
+
+#define CMD_LED_COLOR 5
+#define CMD_LED_SET_BRIGHTNESS 7
+#define CMD_LED_GET_BRIGHTNESS 8
+
+struct omnia_led {
+ struct led_classdev_mc mc_cdev;
+ struct mc_subled subled_info[OMNIA_LED_NUM_CHANNELS];
+ int reg;
+};
+
+#define to_omnia_led(l) container_of(l, struct omnia_led, mc_cdev)
+
+struct omnia_leds {
+ struct i2c_client *client;
+ struct mutex lock;
+ struct omnia_led leds[];
+};
+
+static int omnia_cmd_write_u8(const struct i2c_client *client, u8 cmd, u8 val)
+{
+ u8 buf[2] = { cmd, val };
+
+ return i2c_master_send(client, buf, sizeof(buf));
+}
+
+static int omnia_cmd_read_u8(const struct i2c_client *client, u8 cmd)
+{
+ struct i2c_msg msgs[2];
+ u8 reply;
+ int ret;
+
+ msgs[0].addr = client->addr;
+ msgs[0].flags = 0;
+ msgs[0].len = 1;
+ msgs[0].buf = &cmd;
+ msgs[1].addr = client->addr;
+ msgs[1].flags = I2C_M_RD;
+ msgs[1].len = 1;
+ msgs[1].buf = &reply;
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (likely(ret == ARRAY_SIZE(msgs)))
+ return reply;
+ else if (ret < 0)
+ return ret;
+ else
+ return -EIO;
+}
+
+static int omnia_led_brightness_set_blocking(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev);
+ struct omnia_leds *leds = dev_get_drvdata(cdev->dev->parent);
+ struct omnia_led *led = to_omnia_led(mc_cdev);
+ u8 buf[5], state;
+ int ret;
+
+ mutex_lock(&leds->lock);
+
+ led_mc_calc_color_components(&led->mc_cdev, brightness);
+
+ buf[0] = CMD_LED_COLOR;
+ buf[1] = led->reg;
+ buf[2] = mc_cdev->subled_info[0].brightness;
+ buf[3] = mc_cdev->subled_info[1].brightness;
+ buf[4] = mc_cdev->subled_info[2].brightness;
+
+ state = CMD_LED_STATE_LED(led->reg);
+ if (buf[2] || buf[3] || buf[4])
+ state |= CMD_LED_STATE_ON;
+
+ ret = omnia_cmd_write_u8(leds->client, CMD_LED_STATE, state);
+ if (ret >= 0 && (state & CMD_LED_STATE_ON))
+ ret = i2c_master_send(leds->client, buf, 5);
+
+ mutex_unlock(&leds->lock);
+
+ return ret;
+}
+
+static int omnia_led_register(struct i2c_client *client, struct omnia_led *led,
+ struct device_node *np)
+{
+ struct led_init_data init_data = {};
+ struct device *dev = &client->dev;
+ struct led_classdev *cdev;
+ int ret, color;
+
+ ret = of_property_read_u32(np, "reg", &led->reg);
+ if (ret || led->reg >= OMNIA_BOARD_LEDS) {
+ dev_warn(dev,
+ "Node %pOF: must contain 'reg' property with values between 0 and %i\n",
+ np, OMNIA_BOARD_LEDS - 1);
+ return 0;
+ }
+
+ ret = of_property_read_u32(np, "color", &color);
+ if (ret || color != LED_COLOR_ID_RGB) {
+ dev_warn(dev,
+ "Node %pOF: must contain 'color' property with value LED_COLOR_ID_RGB\n",
+ np);
+ return 0;
+ }
+
+ led->subled_info[0].color_index = LED_COLOR_ID_RED;
+ led->subled_info[0].channel = 0;
+ led->subled_info[1].color_index = LED_COLOR_ID_GREEN;
+ led->subled_info[1].channel = 1;
+ led->subled_info[2].color_index = LED_COLOR_ID_BLUE;
+ led->subled_info[2].channel = 2;
+
+ led->mc_cdev.subled_info = led->subled_info;
+ led->mc_cdev.num_colors = OMNIA_LED_NUM_CHANNELS;
+
+ init_data.fwnode = &np->fwnode;
+
+ cdev = &led->mc_cdev.led_cdev;
+ cdev->max_brightness = 255;
+ cdev->brightness_set_blocking = omnia_led_brightness_set_blocking;
+
+ /* put the LED into software mode */
+ ret = omnia_cmd_write_u8(client, CMD_LED_MODE,
+ CMD_LED_MODE_LED(led->reg) |
+ CMD_LED_MODE_USER);
+ if (ret < 0) {
+ dev_err(dev, "Cannot set LED %pOF to software mode: %i\n", np,
+ ret);
+ return ret;
+ }
+
+ /* disable the LED */
+ ret = omnia_cmd_write_u8(client, CMD_LED_STATE,
+ CMD_LED_STATE_LED(led->reg));
+ if (ret < 0) {
+ dev_err(dev, "Cannot set LED %pOF brightness: %i\n", np, ret);
+ return ret;
+ }
+
+ ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc_cdev,
+ &init_data);
+ if (ret < 0) {
+ dev_err(dev, "Cannot register LED %pOF: %i\n", np, ret);
+ return ret;
+ }
+
+ return 1;
+}
+
+/*
+ * On the front panel of the Turris Omnia router there is also a button which
+ * can be used to control the intensity of all the LEDs at once, so that if they
+ * are too bright, user can dim them.
+ * The microcontroller cycles between 8 levels of this global brightness (from
+ * 100% to 0%), but this setting can have any integer value between 0 and 100.
+ * It is therefore convenient to be able to change this setting from software.
+ * We expose this setting via a sysfs attribute file called "brightness". This
+ * file lives in the device directory of the LED controller, not an individual
+ * LED, so it should not confuse users.
+ */
+static ssize_t brightness_show(struct device *dev, struct device_attribute *a,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int ret;
+
+ ret = omnia_cmd_read_u8(client, CMD_LED_GET_BRIGHTNESS);
+
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", ret);
+}
+
+static ssize_t brightness_store(struct device *dev, struct device_attribute *a,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ unsigned long brightness;
+ int ret;
+
+ if (kstrtoul(buf, 10, &brightness))
+ return -EINVAL;
+
+ if (brightness > 100)
+ return -EINVAL;
+
+ ret = omnia_cmd_write_u8(client, CMD_LED_SET_BRIGHTNESS, brightness);
+
+ return ret < 0 ? ret : count;
+}
+static DEVICE_ATTR_RW(brightness);
+
+static struct attribute *omnia_led_controller_attrs[] = {
+ &dev_attr_brightness.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(omnia_led_controller);
+
+static int omnia_leds_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct device_node *np = dev_of_node(dev), *child;
+ struct omnia_leds *leds;
+ struct omnia_led *led;
+ int ret, count;
+
+ count = of_get_available_child_count(np);
+ if (!count) {
+ dev_err(dev, "LEDs are not defined in device tree!\n");
+ return -ENODEV;
+ } else if (count > OMNIA_BOARD_LEDS) {
+ dev_err(dev, "Too many LEDs defined in device tree!\n");
+ return -EINVAL;
+ }
+
+ leds = devm_kzalloc(dev, struct_size(leds, leds, count), GFP_KERNEL);
+ if (!leds)
+ return -ENOMEM;
+
+ leds->client = client;
+ i2c_set_clientdata(client, leds);
+
+ mutex_init(&leds->lock);
+
+ led = &leds->leds[0];
+ for_each_available_child_of_node(np, child) {
+ ret = omnia_led_register(client, led, child);
+ if (ret < 0) {
+ of_node_put(child);
+ return ret;
+ }
+
+ led += ret;
+ }
+
+ return 0;
+}
+
+static void omnia_leds_remove(struct i2c_client *client)
+{
+ u8 buf[5];
+
+ /* put all LEDs into default (HW triggered) mode */
+ omnia_cmd_write_u8(client, CMD_LED_MODE,
+ CMD_LED_MODE_LED(OMNIA_BOARD_LEDS));
+
+ /* set all LEDs color to [255, 255, 255] */
+ buf[0] = CMD_LED_COLOR;
+ buf[1] = OMNIA_BOARD_LEDS;
+ buf[2] = 255;
+ buf[3] = 255;
+ buf[4] = 255;
+
+ i2c_master_send(client, buf, 5);
+}
+
+static const struct of_device_id of_omnia_leds_match[] = {
+ { .compatible = "cznic,turris-omnia-leds", },
+ {},
+};
+
+static const struct i2c_device_id omnia_id[] = {
+ { "omnia", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, omnia_id);
+
+static struct i2c_driver omnia_leds_driver = {
+ .probe = omnia_leds_probe,
+ .remove = omnia_leds_remove,
+ .id_table = omnia_id,
+ .driver = {
+ .name = "leds-turris-omnia",
+ .of_match_table = of_omnia_leds_match,
+ .dev_groups = omnia_led_controller_groups,
+ },
+};
+
+module_i2c_driver(omnia_leds_driver);
+
+MODULE_AUTHOR("Marek Behun <kabel@kernel.org>");
+MODULE_DESCRIPTION("CZ.NIC's Turris Omnia LEDs");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-wm831x-status.c b/drivers/leds/leds-wm831x-status.c
new file mode 100644
index 000000000..c48b80574
--- /dev/null
+++ b/drivers/leds/leds-wm831x-status.c
@@ -0,0 +1,305 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED driver for WM831x status LEDs
+ *
+ * Copyright(C) 2009 Wolfson Microelectronics PLC.
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <linux/mfd/wm831x/core.h>
+#include <linux/mfd/wm831x/pdata.h>
+#include <linux/mfd/wm831x/status.h>
+#include <linux/module.h>
+
+
+struct wm831x_status {
+ struct led_classdev cdev;
+ struct wm831x *wm831x;
+ struct mutex mutex;
+
+ spinlock_t value_lock;
+ int reg; /* Control register */
+ int reg_val; /* Control register value */
+
+ int blink;
+ int blink_time;
+ int blink_cyc;
+ int src;
+ enum led_brightness brightness;
+};
+
+#define to_wm831x_status(led_cdev) \
+ container_of(led_cdev, struct wm831x_status, cdev)
+
+static void wm831x_status_set(struct wm831x_status *led)
+{
+ unsigned long flags;
+
+ mutex_lock(&led->mutex);
+
+ led->reg_val &= ~(WM831X_LED_SRC_MASK | WM831X_LED_MODE_MASK |
+ WM831X_LED_DUTY_CYC_MASK | WM831X_LED_DUR_MASK);
+
+ spin_lock_irqsave(&led->value_lock, flags);
+
+ led->reg_val |= led->src << WM831X_LED_SRC_SHIFT;
+ if (led->blink) {
+ led->reg_val |= 2 << WM831X_LED_MODE_SHIFT;
+ led->reg_val |= led->blink_time << WM831X_LED_DUR_SHIFT;
+ led->reg_val |= led->blink_cyc;
+ } else {
+ if (led->brightness != LED_OFF)
+ led->reg_val |= 1 << WM831X_LED_MODE_SHIFT;
+ }
+
+ spin_unlock_irqrestore(&led->value_lock, flags);
+
+ wm831x_reg_write(led->wm831x, led->reg, led->reg_val);
+
+ mutex_unlock(&led->mutex);
+}
+
+static int wm831x_status_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct wm831x_status *led = to_wm831x_status(led_cdev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&led->value_lock, flags);
+ led->brightness = value;
+ if (value == LED_OFF)
+ led->blink = 0;
+ spin_unlock_irqrestore(&led->value_lock, flags);
+ wm831x_status_set(led);
+
+ return 0;
+}
+
+static int wm831x_status_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct wm831x_status *led = to_wm831x_status(led_cdev);
+ unsigned long flags;
+ int ret = 0;
+
+ /* Pick some defaults if we've not been given times */
+ if (*delay_on == 0 && *delay_off == 0) {
+ *delay_on = 250;
+ *delay_off = 250;
+ }
+
+ spin_lock_irqsave(&led->value_lock, flags);
+
+ /* We only have a limited selection of settings, see if we can
+ * support the configuration we're being given */
+ switch (*delay_on) {
+ case 1000:
+ led->blink_time = 0;
+ break;
+ case 250:
+ led->blink_time = 1;
+ break;
+ case 125:
+ led->blink_time = 2;
+ break;
+ case 62:
+ case 63:
+ /* Actually 62.5ms */
+ led->blink_time = 3;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ if (ret == 0) {
+ switch (*delay_off / *delay_on) {
+ case 1:
+ led->blink_cyc = 0;
+ break;
+ case 3:
+ led->blink_cyc = 1;
+ break;
+ case 4:
+ led->blink_cyc = 2;
+ break;
+ case 8:
+ led->blink_cyc = 3;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ }
+
+ if (ret == 0)
+ led->blink = 1;
+ else
+ led->blink = 0;
+
+ spin_unlock_irqrestore(&led->value_lock, flags);
+ wm831x_status_set(led);
+
+ return ret;
+}
+
+static const char * const led_src_texts[] = {
+ "otp",
+ "power",
+ "charger",
+ "soft",
+};
+
+static ssize_t src_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct wm831x_status *led = to_wm831x_status(led_cdev);
+ int i;
+ ssize_t ret = 0;
+
+ mutex_lock(&led->mutex);
+
+ for (i = 0; i < ARRAY_SIZE(led_src_texts); i++)
+ if (i == led->src)
+ ret += sprintf(&buf[ret], "[%s] ", led_src_texts[i]);
+ else
+ ret += sprintf(&buf[ret], "%s ", led_src_texts[i]);
+
+ mutex_unlock(&led->mutex);
+
+ ret += sprintf(&buf[ret], "\n");
+
+ return ret;
+}
+
+static ssize_t src_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct wm831x_status *led = to_wm831x_status(led_cdev);
+ int i;
+
+ i = sysfs_match_string(led_src_texts, buf);
+ if (i >= 0) {
+ mutex_lock(&led->mutex);
+ led->src = i;
+ mutex_unlock(&led->mutex);
+ wm831x_status_set(led);
+ }
+
+ return size;
+}
+
+static DEVICE_ATTR_RW(src);
+
+static struct attribute *wm831x_status_attrs[] = {
+ &dev_attr_src.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(wm831x_status);
+
+static int wm831x_status_probe(struct platform_device *pdev)
+{
+ struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
+ struct wm831x_pdata *chip_pdata;
+ struct wm831x_status_pdata pdata;
+ struct wm831x_status *drvdata;
+ struct resource *res;
+ int id = pdev->id % ARRAY_SIZE(chip_pdata->status);
+ int ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_REG, 0);
+ if (res == NULL) {
+ dev_err(&pdev->dev, "No register resource\n");
+ return -EINVAL;
+ }
+
+ drvdata = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_status),
+ GFP_KERNEL);
+ if (!drvdata)
+ return -ENOMEM;
+
+ drvdata->wm831x = wm831x;
+ drvdata->reg = res->start;
+
+ if (dev_get_platdata(wm831x->dev))
+ chip_pdata = dev_get_platdata(wm831x->dev);
+ else
+ chip_pdata = NULL;
+
+ memset(&pdata, 0, sizeof(pdata));
+ if (chip_pdata && chip_pdata->status[id])
+ memcpy(&pdata, chip_pdata->status[id], sizeof(pdata));
+ else
+ pdata.name = dev_name(&pdev->dev);
+
+ mutex_init(&drvdata->mutex);
+ spin_lock_init(&drvdata->value_lock);
+
+ /* We cache the configuration register and read startup values
+ * from it. */
+ drvdata->reg_val = wm831x_reg_read(wm831x, drvdata->reg);
+
+ if (drvdata->reg_val & WM831X_LED_MODE_MASK)
+ drvdata->brightness = LED_FULL;
+ else
+ drvdata->brightness = LED_OFF;
+
+ /* Set a default source if configured, otherwise leave the
+ * current hardware setting.
+ */
+ if (pdata.default_src == WM831X_STATUS_PRESERVE) {
+ drvdata->src = drvdata->reg_val;
+ drvdata->src &= WM831X_LED_SRC_MASK;
+ drvdata->src >>= WM831X_LED_SRC_SHIFT;
+ } else {
+ drvdata->src = pdata.default_src - 1;
+ }
+
+ drvdata->cdev.name = pdata.name;
+ drvdata->cdev.default_trigger = pdata.default_trigger;
+ drvdata->cdev.brightness_set_blocking = wm831x_status_brightness_set;
+ drvdata->cdev.blink_set = wm831x_status_blink_set;
+ drvdata->cdev.groups = wm831x_status_groups;
+
+ ret = led_classdev_register(wm831x->dev, &drvdata->cdev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to register LED: %d\n", ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, drvdata);
+
+ return 0;
+}
+
+static int wm831x_status_remove(struct platform_device *pdev)
+{
+ struct wm831x_status *drvdata = platform_get_drvdata(pdev);
+
+ led_classdev_unregister(&drvdata->cdev);
+
+ return 0;
+}
+
+static struct platform_driver wm831x_status_driver = {
+ .driver = {
+ .name = "wm831x-status",
+ },
+ .probe = wm831x_status_probe,
+ .remove = wm831x_status_remove,
+};
+
+module_platform_driver(wm831x_status_driver);
+
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("WM831x status LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm831x-status");
diff --git a/drivers/leds/leds-wm8350.c b/drivers/leds/leds-wm8350.c
new file mode 100644
index 000000000..8f243c413
--- /dev/null
+++ b/drivers/leds/leds-wm8350.c
@@ -0,0 +1,268 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED driver for WM8350 driven LEDS.
+ *
+ * Copyright(C) 2007, 2008 Wolfson Microelectronics PLC.
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <linux/mfd/wm8350/pmic.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+
+/* Microamps */
+static const int isink_cur[] = {
+ 4,
+ 5,
+ 6,
+ 7,
+ 8,
+ 10,
+ 11,
+ 14,
+ 16,
+ 19,
+ 23,
+ 27,
+ 32,
+ 39,
+ 46,
+ 54,
+ 65,
+ 77,
+ 92,
+ 109,
+ 130,
+ 154,
+ 183,
+ 218,
+ 259,
+ 308,
+ 367,
+ 436,
+ 518,
+ 616,
+ 733,
+ 872,
+ 1037,
+ 1233,
+ 1466,
+ 1744,
+ 2073,
+ 2466,
+ 2933,
+ 3487,
+ 4147,
+ 4932,
+ 5865,
+ 6975,
+ 8294,
+ 9864,
+ 11730,
+ 13949,
+ 16589,
+ 19728,
+ 23460,
+ 27899,
+ 33178,
+ 39455,
+ 46920,
+ 55798,
+ 66355,
+ 78910,
+ 93840,
+ 111596,
+ 132710,
+ 157820,
+ 187681,
+ 223191
+};
+
+#define to_wm8350_led(led_cdev) \
+ container_of(led_cdev, struct wm8350_led, cdev)
+
+static int wm8350_led_enable(struct wm8350_led *led)
+{
+ int ret = 0;
+
+ if (led->enabled)
+ return ret;
+
+ ret = regulator_enable(led->isink);
+ if (ret != 0) {
+ dev_err(led->cdev.dev, "Failed to enable ISINK: %d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_enable(led->dcdc);
+ if (ret != 0) {
+ dev_err(led->cdev.dev, "Failed to enable DCDC: %d\n", ret);
+ regulator_disable(led->isink);
+ return ret;
+ }
+
+ led->enabled = 1;
+
+ return ret;
+}
+
+static int wm8350_led_disable(struct wm8350_led *led)
+{
+ int ret = 0;
+
+ if (!led->enabled)
+ return ret;
+
+ ret = regulator_disable(led->dcdc);
+ if (ret != 0) {
+ dev_err(led->cdev.dev, "Failed to disable DCDC: %d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_disable(led->isink);
+ if (ret != 0) {
+ dev_err(led->cdev.dev, "Failed to disable ISINK: %d\n", ret);
+ ret = regulator_enable(led->dcdc);
+ if (ret != 0)
+ dev_err(led->cdev.dev, "Failed to reenable DCDC: %d\n",
+ ret);
+ return ret;
+ }
+
+ led->enabled = 0;
+
+ return ret;
+}
+
+static int wm8350_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct wm8350_led *led = to_wm8350_led(led_cdev);
+ unsigned long flags;
+ int ret;
+ int uA;
+
+ led->value = value;
+
+ spin_lock_irqsave(&led->value_lock, flags);
+
+ if (led->value == LED_OFF) {
+ spin_unlock_irqrestore(&led->value_lock, flags);
+ return wm8350_led_disable(led);
+ }
+
+ /* This scales linearly into the index of valid current
+ * settings which results in a linear scaling of perceived
+ * brightness due to the non-linear current settings provided
+ * by the hardware.
+ */
+ uA = (led->max_uA_index * led->value) / LED_FULL;
+ spin_unlock_irqrestore(&led->value_lock, flags);
+ BUG_ON(uA >= ARRAY_SIZE(isink_cur));
+
+ ret = regulator_set_current_limit(led->isink, isink_cur[uA],
+ isink_cur[uA]);
+ if (ret != 0) {
+ dev_err(led->cdev.dev, "Failed to set %duA: %d\n",
+ isink_cur[uA], ret);
+ return ret;
+ }
+
+ return wm8350_led_enable(led);
+}
+
+static void wm8350_led_shutdown(struct platform_device *pdev)
+{
+ struct wm8350_led *led = platform_get_drvdata(pdev);
+
+ led->value = LED_OFF;
+ wm8350_led_disable(led);
+}
+
+static int wm8350_led_probe(struct platform_device *pdev)
+{
+ struct regulator *isink, *dcdc;
+ struct wm8350_led *led;
+ struct wm8350_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ int i;
+
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "no platform data\n");
+ return -ENODEV;
+ }
+
+ if (pdata->max_uA < isink_cur[0]) {
+ dev_err(&pdev->dev, "Invalid maximum current %duA\n",
+ pdata->max_uA);
+ return -EINVAL;
+ }
+
+ isink = devm_regulator_get(&pdev->dev, "led_isink");
+ if (IS_ERR(isink)) {
+ dev_err(&pdev->dev, "%s: can't get ISINK\n", __func__);
+ return PTR_ERR(isink);
+ }
+
+ dcdc = devm_regulator_get(&pdev->dev, "led_vcc");
+ if (IS_ERR(dcdc)) {
+ dev_err(&pdev->dev, "%s: can't get DCDC\n", __func__);
+ return PTR_ERR(dcdc);
+ }
+
+ led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
+ if (led == NULL)
+ return -ENOMEM;
+
+ led->cdev.brightness_set_blocking = wm8350_led_set;
+ led->cdev.default_trigger = pdata->default_trigger;
+ led->cdev.name = pdata->name;
+ led->cdev.flags |= LED_CORE_SUSPENDRESUME;
+ led->enabled = regulator_is_enabled(isink);
+ led->isink = isink;
+ led->dcdc = dcdc;
+
+ for (i = 0; i < ARRAY_SIZE(isink_cur) - 1; i++)
+ if (isink_cur[i] >= pdata->max_uA)
+ break;
+ led->max_uA_index = i;
+ if (pdata->max_uA != isink_cur[i])
+ dev_warn(&pdev->dev,
+ "Maximum current %duA is not directly supported,"
+ " check platform data\n",
+ pdata->max_uA);
+
+ spin_lock_init(&led->value_lock);
+ led->value = LED_OFF;
+ platform_set_drvdata(pdev, led);
+
+ return led_classdev_register(&pdev->dev, &led->cdev);
+}
+
+static int wm8350_led_remove(struct platform_device *pdev)
+{
+ struct wm8350_led *led = platform_get_drvdata(pdev);
+
+ led_classdev_unregister(&led->cdev);
+ wm8350_led_disable(led);
+ return 0;
+}
+
+static struct platform_driver wm8350_led_driver = {
+ .driver = {
+ .name = "wm8350-led",
+ },
+ .probe = wm8350_led_probe,
+ .remove = wm8350_led_remove,
+ .shutdown = wm8350_led_shutdown,
+};
+
+module_platform_driver(wm8350_led_driver);
+
+MODULE_AUTHOR("Mark Brown");
+MODULE_DESCRIPTION("WM8350 LED driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm8350-led");
diff --git a/drivers/leds/leds-wrap.c b/drivers/leds/leds-wrap.c
new file mode 100644
index 000000000..794697e16
--- /dev/null
+++ b/drivers/leds/leds-wrap.c
@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LEDs driver for PCEngines WRAP
+ *
+ * Copyright (C) 2006 Kristian Kielhofner <kris@krisk.org>
+ *
+ * Based on leds-net48xx.c
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/scx200_gpio.h>
+#include <linux/module.h>
+
+#define DRVNAME "wrap-led"
+#define WRAP_POWER_LED_GPIO 2
+#define WRAP_ERROR_LED_GPIO 3
+#define WRAP_EXTRA_LED_GPIO 18
+
+static struct platform_device *pdev;
+
+static void wrap_power_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ if (value)
+ scx200_gpio_set_low(WRAP_POWER_LED_GPIO);
+ else
+ scx200_gpio_set_high(WRAP_POWER_LED_GPIO);
+}
+
+static void wrap_error_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ if (value)
+ scx200_gpio_set_low(WRAP_ERROR_LED_GPIO);
+ else
+ scx200_gpio_set_high(WRAP_ERROR_LED_GPIO);
+}
+
+static void wrap_extra_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ if (value)
+ scx200_gpio_set_low(WRAP_EXTRA_LED_GPIO);
+ else
+ scx200_gpio_set_high(WRAP_EXTRA_LED_GPIO);
+}
+
+static struct led_classdev wrap_power_led = {
+ .name = "wrap::power",
+ .brightness_set = wrap_power_led_set,
+ .default_trigger = "default-on",
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static struct led_classdev wrap_error_led = {
+ .name = "wrap::error",
+ .brightness_set = wrap_error_led_set,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static struct led_classdev wrap_extra_led = {
+ .name = "wrap::extra",
+ .brightness_set = wrap_extra_led_set,
+ .flags = LED_CORE_SUSPENDRESUME,
+};
+
+static int wrap_led_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = devm_led_classdev_register(&pdev->dev, &wrap_power_led);
+ if (ret < 0)
+ return ret;
+
+ ret = devm_led_classdev_register(&pdev->dev, &wrap_error_led);
+ if (ret < 0)
+ return ret;
+
+ return devm_led_classdev_register(&pdev->dev, &wrap_extra_led);
+}
+
+static struct platform_driver wrap_led_driver = {
+ .probe = wrap_led_probe,
+ .driver = {
+ .name = DRVNAME,
+ },
+};
+
+static int __init wrap_led_init(void)
+{
+ int ret;
+
+ if (!scx200_gpio_present()) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ ret = platform_driver_register(&wrap_led_driver);
+ if (ret < 0)
+ goto out;
+
+ pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
+ if (IS_ERR(pdev)) {
+ ret = PTR_ERR(pdev);
+ platform_driver_unregister(&wrap_led_driver);
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
+static void __exit wrap_led_exit(void)
+{
+ platform_device_unregister(pdev);
+ platform_driver_unregister(&wrap_led_driver);
+}
+
+module_init(wrap_led_init);
+module_exit(wrap_led_exit);
+
+MODULE_AUTHOR("Kristian Kielhofner <kris@krisk.org>");
+MODULE_DESCRIPTION("PCEngines WRAP LED driver");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/leds/leds.h b/drivers/leds/leds.h
new file mode 100644
index 000000000..aa64757a4
--- /dev/null
+++ b/drivers/leds/leds.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * LED Core
+ *
+ * Copyright 2005 Openedhand Ltd.
+ *
+ * Author: Richard Purdie <rpurdie@openedhand.com>
+ */
+#ifndef __LEDS_H_INCLUDED
+#define __LEDS_H_INCLUDED
+
+#include <linux/rwsem.h>
+#include <linux/leds.h>
+
+static inline int led_get_brightness(struct led_classdev *led_cdev)
+{
+ return led_cdev->brightness;
+}
+
+void led_init_core(struct led_classdev *led_cdev);
+void led_stop_software_blink(struct led_classdev *led_cdev);
+void led_set_brightness_nopm(struct led_classdev *led_cdev, unsigned int value);
+void led_set_brightness_nosleep(struct led_classdev *led_cdev, unsigned int value);
+ssize_t led_trigger_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t pos, size_t count);
+ssize_t led_trigger_write(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf,
+ loff_t pos, size_t count);
+enum led_default_state led_init_default_state_get(struct fwnode_handle *fwnode);
+
+extern struct rw_semaphore leds_list_lock;
+extern struct list_head leds_list;
+extern struct list_head trigger_list;
+extern const char * const led_colors[LED_COLOR_ID_MAX];
+
+#endif /* __LEDS_H_INCLUDED */
diff --git a/drivers/leds/rgb/Kconfig b/drivers/leds/rgb/Kconfig
new file mode 100644
index 000000000..204cf470b
--- /dev/null
+++ b/drivers/leds/rgb/Kconfig
@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: GPL-2.0
+
+if LEDS_CLASS_MULTICOLOR
+
+config LEDS_PWM_MULTICOLOR
+ tristate "PWM driven multi-color LED Support"
+ depends on PWM
+ help
+ This option enables support for PWM driven monochrome LEDs that are
+ grouped into multicolor LEDs.
+
+ To compile this driver as a module, choose M here: the module
+ will be called leds-pwm-multicolor.
+
+config LEDS_QCOM_LPG
+ tristate "LED support for Qualcomm LPG"
+ depends on OF
+ depends on PWM
+ depends on SPMI
+ help
+ This option enables support for the Light Pulse Generator found in a
+ wide variety of Qualcomm PMICs. The LPG consists of a number of PWM
+ channels and typically a shared pattern lookup table and a current
+ sink, intended to drive RGB LEDs. Each channel can either be used as
+ a LED, grouped to represent a RGB LED or exposed as PWM channels.
+
+ If compiled as a module, the module will be named leds-qcom-lpg.
+
+endif # LEDS_CLASS_MULTICOLOR
diff --git a/drivers/leds/rgb/Makefile b/drivers/leds/rgb/Makefile
new file mode 100644
index 000000000..0675bc0f6
--- /dev/null
+++ b/drivers/leds/rgb/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_LEDS_PWM_MULTICOLOR) += leds-pwm-multicolor.o
+obj-$(CONFIG_LEDS_QCOM_LPG) += leds-qcom-lpg.o
diff --git a/drivers/leds/rgb/leds-pwm-multicolor.c b/drivers/leds/rgb/leds-pwm-multicolor.c
new file mode 100644
index 000000000..da9d2218a
--- /dev/null
+++ b/drivers/leds/rgb/leds-pwm-multicolor.c
@@ -0,0 +1,190 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * PWM-based multi-color LED control
+ *
+ * Copyright 2022 Sven Schwermer <sven.schwermer@disruptive-technologies.com>
+ */
+
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/leds.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/pwm.h>
+
+struct pwm_led {
+ struct pwm_device *pwm;
+ struct pwm_state state;
+ bool active_low;
+};
+
+struct pwm_mc_led {
+ struct led_classdev_mc mc_cdev;
+ struct mutex lock;
+ struct pwm_led leds[];
+};
+
+static int led_pwm_mc_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev);
+ struct pwm_mc_led *priv = container_of(mc_cdev, struct pwm_mc_led, mc_cdev);
+ unsigned long long duty;
+ int ret = 0;
+ int i;
+
+ led_mc_calc_color_components(mc_cdev, brightness);
+
+ mutex_lock(&priv->lock);
+
+ for (i = 0; i < mc_cdev->num_colors; i++) {
+ duty = priv->leds[i].state.period;
+ duty *= mc_cdev->subled_info[i].brightness;
+ do_div(duty, cdev->max_brightness);
+
+ if (priv->leds[i].active_low)
+ duty = priv->leds[i].state.period - duty;
+
+ priv->leds[i].state.duty_cycle = duty;
+ priv->leds[i].state.enabled = duty > 0;
+ ret = pwm_apply_state(priv->leds[i].pwm,
+ &priv->leds[i].state);
+ if (ret)
+ break;
+ }
+
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int iterate_subleds(struct device *dev, struct pwm_mc_led *priv,
+ struct fwnode_handle *mcnode)
+{
+ struct mc_subled *subled = priv->mc_cdev.subled_info;
+ struct fwnode_handle *fwnode;
+ struct pwm_led *pwmled;
+ u32 color;
+ int ret;
+
+ /* iterate over the nodes inside the multi-led node */
+ fwnode_for_each_child_node(mcnode, fwnode) {
+ pwmled = &priv->leds[priv->mc_cdev.num_colors];
+ pwmled->pwm = devm_fwnode_pwm_get(dev, fwnode, NULL);
+ if (IS_ERR(pwmled->pwm)) {
+ ret = dev_err_probe(dev, PTR_ERR(pwmled->pwm), "unable to request PWM\n");
+ goto release_fwnode;
+ }
+ pwm_init_state(pwmled->pwm, &pwmled->state);
+ pwmled->active_low = fwnode_property_read_bool(fwnode, "active-low");
+
+ ret = fwnode_property_read_u32(fwnode, "color", &color);
+ if (ret) {
+ dev_err(dev, "cannot read color: %d\n", ret);
+ goto release_fwnode;
+ }
+
+ subled[priv->mc_cdev.num_colors].color_index = color;
+ priv->mc_cdev.num_colors++;
+ }
+
+ return 0;
+
+release_fwnode:
+ fwnode_handle_put(fwnode);
+ return ret;
+}
+
+static int led_pwm_mc_probe(struct platform_device *pdev)
+{
+ struct fwnode_handle *mcnode, *fwnode;
+ struct led_init_data init_data = {};
+ struct led_classdev *cdev;
+ struct mc_subled *subled;
+ struct pwm_mc_led *priv;
+ int count = 0;
+ int ret = 0;
+
+ mcnode = device_get_named_child_node(&pdev->dev, "multi-led");
+ if (!mcnode)
+ return dev_err_probe(&pdev->dev, -ENODEV,
+ "expected multi-led node\n");
+
+ /* count the nodes inside the multi-led node */
+ fwnode_for_each_child_node(mcnode, fwnode)
+ count++;
+
+ priv = devm_kzalloc(&pdev->dev, struct_size(priv, leds, count),
+ GFP_KERNEL);
+ if (!priv) {
+ ret = -ENOMEM;
+ goto release_mcnode;
+ }
+ mutex_init(&priv->lock);
+
+ subled = devm_kcalloc(&pdev->dev, count, sizeof(*subled), GFP_KERNEL);
+ if (!subled) {
+ ret = -ENOMEM;
+ goto release_mcnode;
+ }
+ priv->mc_cdev.subled_info = subled;
+
+ /* init the multicolor's LED class device */
+ cdev = &priv->mc_cdev.led_cdev;
+ fwnode_property_read_u32(mcnode, "max-brightness",
+ &cdev->max_brightness);
+ cdev->flags = LED_CORE_SUSPENDRESUME;
+ cdev->brightness_set_blocking = led_pwm_mc_set;
+
+ ret = iterate_subleds(&pdev->dev, priv, mcnode);
+ if (ret)
+ goto release_mcnode;
+
+ init_data.fwnode = mcnode;
+ ret = devm_led_classdev_multicolor_register_ext(&pdev->dev,
+ &priv->mc_cdev,
+ &init_data);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed to register multicolor PWM led for %s: %d\n",
+ cdev->name, ret);
+ goto release_mcnode;
+ }
+
+ ret = led_pwm_mc_set(cdev, cdev->brightness);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "failed to set led PWM value for %s: %d",
+ cdev->name, ret);
+
+ platform_set_drvdata(pdev, priv);
+ return 0;
+
+release_mcnode:
+ fwnode_handle_put(mcnode);
+ return ret;
+}
+
+static const struct of_device_id of_pwm_leds_mc_match[] = {
+ { .compatible = "pwm-leds-multicolor", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, of_pwm_leds_mc_match);
+
+static struct platform_driver led_pwm_mc_driver = {
+ .probe = led_pwm_mc_probe,
+ .driver = {
+ .name = "leds_pwm_multicolor",
+ .of_match_table = of_pwm_leds_mc_match,
+ },
+};
+module_platform_driver(led_pwm_mc_driver);
+
+MODULE_AUTHOR("Sven Schwermer <sven.schwermer@disruptive-technologies.com>");
+MODULE_DESCRIPTION("multi-color PWM LED driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:leds-pwm-multicolor");
diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c
new file mode 100644
index 000000000..f85a5d65d
--- /dev/null
+++ b/drivers/leds/rgb/leds-qcom-lpg.c
@@ -0,0 +1,1461 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2017-2022 Linaro Ltd
+ * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
+ */
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pwm.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define LPG_SUBTYPE_REG 0x05
+#define LPG_SUBTYPE_LPG 0x2
+#define LPG_SUBTYPE_PWM 0xb
+#define LPG_SUBTYPE_LPG_LITE 0x11
+#define LPG_PATTERN_CONFIG_REG 0x40
+#define LPG_SIZE_CLK_REG 0x41
+#define PWM_CLK_SELECT_MASK GENMASK(1, 0)
+#define LPG_PREDIV_CLK_REG 0x42
+#define PWM_FREQ_PRE_DIV_MASK GENMASK(6, 5)
+#define PWM_FREQ_EXP_MASK GENMASK(2, 0)
+#define PWM_TYPE_CONFIG_REG 0x43
+#define PWM_VALUE_REG 0x44
+#define PWM_ENABLE_CONTROL_REG 0x46
+#define PWM_SYNC_REG 0x47
+#define LPG_RAMP_DURATION_REG 0x50
+#define LPG_HI_PAUSE_REG 0x52
+#define LPG_LO_PAUSE_REG 0x54
+#define LPG_HI_IDX_REG 0x56
+#define LPG_LO_IDX_REG 0x57
+#define PWM_SEC_ACCESS_REG 0xd0
+#define PWM_DTEST_REG(x) (0xe2 + (x) - 1)
+
+#define TRI_LED_SRC_SEL 0x45
+#define TRI_LED_EN_CTL 0x46
+#define TRI_LED_ATC_CTL 0x47
+
+#define LPG_LUT_REG(x) (0x40 + (x) * 2)
+#define RAMP_CONTROL_REG 0xc8
+
+#define LPG_RESOLUTION 512
+#define LPG_MAX_M 7
+
+struct lpg_channel;
+struct lpg_data;
+
+/**
+ * struct lpg - LPG device context
+ * @dev: pointer to LPG device
+ * @map: regmap for register access
+ * @lock: used to synchronize LED and pwm callback requests
+ * @pwm: PWM-chip object, if operating in PWM mode
+ * @data: reference to version specific data
+ * @lut_base: base address of the LUT block (optional)
+ * @lut_size: number of entries in the LUT block
+ * @lut_bitmap: allocation bitmap for LUT entries
+ * @triled_base: base address of the TRILED block (optional)
+ * @triled_src: power-source for the TRILED
+ * @triled_has_atc_ctl: true if there is TRI_LED_ATC_CTL register
+ * @triled_has_src_sel: true if there is TRI_LED_SRC_SEL register
+ * @channels: list of PWM channels
+ * @num_channels: number of @channels
+ */
+struct lpg {
+ struct device *dev;
+ struct regmap *map;
+
+ struct mutex lock;
+
+ struct pwm_chip pwm;
+
+ const struct lpg_data *data;
+
+ u32 lut_base;
+ u32 lut_size;
+ unsigned long *lut_bitmap;
+
+ u32 triled_base;
+ u32 triled_src;
+ bool triled_has_atc_ctl;
+ bool triled_has_src_sel;
+
+ struct lpg_channel *channels;
+ unsigned int num_channels;
+};
+
+/**
+ * struct lpg_channel - per channel data
+ * @lpg: reference to parent lpg
+ * @base: base address of the PWM channel
+ * @triled_mask: mask in TRILED to enable this channel
+ * @lut_mask: mask in LUT to start pattern generator for this channel
+ * @subtype: PMIC hardware block subtype
+ * @in_use: channel is exposed to LED framework
+ * @color: color of the LED attached to this channel
+ * @dtest_line: DTEST line for output, or 0 if disabled
+ * @dtest_value: DTEST line configuration
+ * @pwm_value: duty (in microseconds) of the generated pulses, overridden by LUT
+ * @enabled: output enabled?
+ * @period: period (in nanoseconds) of the generated pulses
+ * @clk_sel: reference clock frequency selector
+ * @pre_div_sel: divider selector of the reference clock
+ * @pre_div_exp: exponential divider of the reference clock
+ * @ramp_enabled: duty cycle is driven by iterating over lookup table
+ * @ramp_ping_pong: reverse through pattern, rather than wrapping to start
+ * @ramp_oneshot: perform only a single pass over the pattern
+ * @ramp_reverse: iterate over pattern backwards
+ * @ramp_tick_ms: length (in milliseconds) of one step in the pattern
+ * @ramp_lo_pause_ms: pause (in milliseconds) before iterating over pattern
+ * @ramp_hi_pause_ms: pause (in milliseconds) after iterating over pattern
+ * @pattern_lo_idx: start index of associated pattern
+ * @pattern_hi_idx: last index of associated pattern
+ */
+struct lpg_channel {
+ struct lpg *lpg;
+
+ u32 base;
+ unsigned int triled_mask;
+ unsigned int lut_mask;
+ unsigned int subtype;
+
+ bool in_use;
+
+ int color;
+
+ u32 dtest_line;
+ u32 dtest_value;
+
+ u16 pwm_value;
+ bool enabled;
+
+ u64 period;
+ unsigned int clk_sel;
+ unsigned int pre_div_sel;
+ unsigned int pre_div_exp;
+
+ bool ramp_enabled;
+ bool ramp_ping_pong;
+ bool ramp_oneshot;
+ bool ramp_reverse;
+ unsigned short ramp_tick_ms;
+ unsigned long ramp_lo_pause_ms;
+ unsigned long ramp_hi_pause_ms;
+
+ unsigned int pattern_lo_idx;
+ unsigned int pattern_hi_idx;
+};
+
+/**
+ * struct lpg_led - logical LED object
+ * @lpg: lpg context reference
+ * @cdev: LED class device
+ * @mcdev: Multicolor LED class device
+ * @num_channels: number of @channels
+ * @channels: list of channels associated with the LED
+ */
+struct lpg_led {
+ struct lpg *lpg;
+
+ struct led_classdev cdev;
+ struct led_classdev_mc mcdev;
+
+ unsigned int num_channels;
+ struct lpg_channel *channels[];
+};
+
+/**
+ * struct lpg_channel_data - per channel initialization data
+ * @base: base address for PWM channel registers
+ * @triled_mask: bitmask for controlling this channel in TRILED
+ */
+struct lpg_channel_data {
+ unsigned int base;
+ u8 triled_mask;
+};
+
+/**
+ * struct lpg_data - initialization data
+ * @lut_base: base address of LUT block
+ * @lut_size: number of entries in LUT
+ * @triled_base: base address of TRILED
+ * @triled_has_atc_ctl: true if there is TRI_LED_ATC_CTL register
+ * @triled_has_src_sel: true if there is TRI_LED_SRC_SEL register
+ * @num_channels: number of channels in LPG
+ * @channels: list of channel initialization data
+ */
+struct lpg_data {
+ unsigned int lut_base;
+ unsigned int lut_size;
+ unsigned int triled_base;
+ bool triled_has_atc_ctl;
+ bool triled_has_src_sel;
+ int num_channels;
+ const struct lpg_channel_data *channels;
+};
+
+static int triled_set(struct lpg *lpg, unsigned int mask, unsigned int enable)
+{
+ /* Skip if we don't have a triled block */
+ if (!lpg->triled_base)
+ return 0;
+
+ return regmap_update_bits(lpg->map, lpg->triled_base + TRI_LED_EN_CTL,
+ mask, enable);
+}
+
+static int lpg_lut_store(struct lpg *lpg, struct led_pattern *pattern,
+ size_t len, unsigned int *lo_idx, unsigned int *hi_idx)
+{
+ unsigned int idx;
+ u16 val;
+ int i;
+
+ idx = bitmap_find_next_zero_area(lpg->lut_bitmap, lpg->lut_size,
+ 0, len, 0);
+ if (idx >= lpg->lut_size)
+ return -ENOMEM;
+
+ for (i = 0; i < len; i++) {
+ val = pattern[i].brightness;
+
+ regmap_bulk_write(lpg->map, lpg->lut_base + LPG_LUT_REG(idx + i),
+ &val, sizeof(val));
+ }
+
+ bitmap_set(lpg->lut_bitmap, idx, len);
+
+ *lo_idx = idx;
+ *hi_idx = idx + len - 1;
+
+ return 0;
+}
+
+static void lpg_lut_free(struct lpg *lpg, unsigned int lo_idx, unsigned int hi_idx)
+{
+ int len;
+
+ len = hi_idx - lo_idx + 1;
+ if (len == 1)
+ return;
+
+ bitmap_clear(lpg->lut_bitmap, lo_idx, len);
+}
+
+static int lpg_lut_sync(struct lpg *lpg, unsigned int mask)
+{
+ return regmap_write(lpg->map, lpg->lut_base + RAMP_CONTROL_REG, mask);
+}
+
+static const unsigned int lpg_clk_rates[] = {0, 1024, 32768, 19200000};
+static const unsigned int lpg_pre_divs[] = {1, 3, 5, 6};
+
+static int lpg_calc_freq(struct lpg_channel *chan, uint64_t period)
+{
+ unsigned int clk_sel, best_clk = 0;
+ unsigned int div, best_div = 0;
+ unsigned int m, best_m = 0;
+ unsigned int error;
+ unsigned int best_err = UINT_MAX;
+ u64 best_period = 0;
+ u64 max_period;
+
+ /*
+ * The PWM period is determined by:
+ *
+ * resolution * pre_div * 2^M
+ * period = --------------------------
+ * refclk
+ *
+ * With resolution fixed at 2^9 bits, pre_div = {1, 3, 5, 6} and
+ * M = [0..7].
+ *
+ * This allows for periods between 27uS and 384s, as the PWM framework
+ * wants a period of equal or lower length than requested, reject
+ * anything below 27uS.
+ */
+ if (period <= (u64)NSEC_PER_SEC * LPG_RESOLUTION / 19200000)
+ return -EINVAL;
+
+ /* Limit period to largest possible value, to avoid overflows */
+ max_period = (u64)NSEC_PER_SEC * LPG_RESOLUTION * 6 * (1 << LPG_MAX_M) / 1024;
+ if (period > max_period)
+ period = max_period;
+
+ /*
+ * Search for the pre_div, refclk and M by solving the rewritten formula
+ * for each refclk and pre_div value:
+ *
+ * period * refclk
+ * M = log2 -------------------------------------
+ * NSEC_PER_SEC * pre_div * resolution
+ */
+ for (clk_sel = 1; clk_sel < ARRAY_SIZE(lpg_clk_rates); clk_sel++) {
+ u64 numerator = period * lpg_clk_rates[clk_sel];
+
+ for (div = 0; div < ARRAY_SIZE(lpg_pre_divs); div++) {
+ u64 denominator = (u64)NSEC_PER_SEC * lpg_pre_divs[div] * LPG_RESOLUTION;
+ u64 actual;
+ u64 ratio;
+
+ if (numerator < denominator)
+ continue;
+
+ ratio = div64_u64(numerator, denominator);
+ m = ilog2(ratio);
+ if (m > LPG_MAX_M)
+ m = LPG_MAX_M;
+
+ actual = DIV_ROUND_UP_ULL(denominator * (1 << m), lpg_clk_rates[clk_sel]);
+
+ error = period - actual;
+ if (error < best_err) {
+ best_err = error;
+
+ best_div = div;
+ best_m = m;
+ best_clk = clk_sel;
+ best_period = actual;
+ }
+ }
+ }
+
+ chan->clk_sel = best_clk;
+ chan->pre_div_sel = best_div;
+ chan->pre_div_exp = best_m;
+ chan->period = best_period;
+
+ return 0;
+}
+
+static void lpg_calc_duty(struct lpg_channel *chan, uint64_t duty)
+{
+ unsigned int max = LPG_RESOLUTION - 1;
+ unsigned int val;
+
+ val = div64_u64(duty * lpg_clk_rates[chan->clk_sel],
+ (u64)NSEC_PER_SEC * lpg_pre_divs[chan->pre_div_sel] * (1 << chan->pre_div_exp));
+
+ chan->pwm_value = min(val, max);
+}
+
+static void lpg_apply_freq(struct lpg_channel *chan)
+{
+ unsigned long val;
+ struct lpg *lpg = chan->lpg;
+
+ if (!chan->enabled)
+ return;
+
+ val = chan->clk_sel;
+
+ /* Specify 9bit resolution, based on the subtype of the channel */
+ switch (chan->subtype) {
+ case LPG_SUBTYPE_LPG:
+ val |= GENMASK(5, 4);
+ break;
+ case LPG_SUBTYPE_PWM:
+ val |= BIT(2);
+ break;
+ case LPG_SUBTYPE_LPG_LITE:
+ default:
+ val |= BIT(4);
+ break;
+ }
+
+ regmap_write(lpg->map, chan->base + LPG_SIZE_CLK_REG, val);
+
+ val = FIELD_PREP(PWM_FREQ_PRE_DIV_MASK, chan->pre_div_sel) |
+ FIELD_PREP(PWM_FREQ_EXP_MASK, chan->pre_div_exp);
+ regmap_write(lpg->map, chan->base + LPG_PREDIV_CLK_REG, val);
+}
+
+#define LPG_ENABLE_GLITCH_REMOVAL BIT(5)
+
+static void lpg_enable_glitch(struct lpg_channel *chan)
+{
+ struct lpg *lpg = chan->lpg;
+
+ regmap_update_bits(lpg->map, chan->base + PWM_TYPE_CONFIG_REG,
+ LPG_ENABLE_GLITCH_REMOVAL, 0);
+}
+
+static void lpg_disable_glitch(struct lpg_channel *chan)
+{
+ struct lpg *lpg = chan->lpg;
+
+ regmap_update_bits(lpg->map, chan->base + PWM_TYPE_CONFIG_REG,
+ LPG_ENABLE_GLITCH_REMOVAL,
+ LPG_ENABLE_GLITCH_REMOVAL);
+}
+
+static void lpg_apply_pwm_value(struct lpg_channel *chan)
+{
+ struct lpg *lpg = chan->lpg;
+ u16 val = chan->pwm_value;
+
+ if (!chan->enabled)
+ return;
+
+ regmap_bulk_write(lpg->map, chan->base + PWM_VALUE_REG, &val, sizeof(val));
+}
+
+#define LPG_PATTERN_CONFIG_LO_TO_HI BIT(4)
+#define LPG_PATTERN_CONFIG_REPEAT BIT(3)
+#define LPG_PATTERN_CONFIG_TOGGLE BIT(2)
+#define LPG_PATTERN_CONFIG_PAUSE_HI BIT(1)
+#define LPG_PATTERN_CONFIG_PAUSE_LO BIT(0)
+
+static void lpg_apply_lut_control(struct lpg_channel *chan)
+{
+ struct lpg *lpg = chan->lpg;
+ unsigned int hi_pause;
+ unsigned int lo_pause;
+ unsigned int conf = 0;
+ unsigned int lo_idx = chan->pattern_lo_idx;
+ unsigned int hi_idx = chan->pattern_hi_idx;
+ u16 step = chan->ramp_tick_ms;
+
+ if (!chan->ramp_enabled || chan->pattern_lo_idx == chan->pattern_hi_idx)
+ return;
+
+ hi_pause = DIV_ROUND_UP(chan->ramp_hi_pause_ms, step);
+ lo_pause = DIV_ROUND_UP(chan->ramp_lo_pause_ms, step);
+
+ if (!chan->ramp_reverse)
+ conf |= LPG_PATTERN_CONFIG_LO_TO_HI;
+ if (!chan->ramp_oneshot)
+ conf |= LPG_PATTERN_CONFIG_REPEAT;
+ if (chan->ramp_ping_pong)
+ conf |= LPG_PATTERN_CONFIG_TOGGLE;
+ if (chan->ramp_hi_pause_ms)
+ conf |= LPG_PATTERN_CONFIG_PAUSE_HI;
+ if (chan->ramp_lo_pause_ms)
+ conf |= LPG_PATTERN_CONFIG_PAUSE_LO;
+
+ regmap_write(lpg->map, chan->base + LPG_PATTERN_CONFIG_REG, conf);
+ regmap_write(lpg->map, chan->base + LPG_HI_IDX_REG, hi_idx);
+ regmap_write(lpg->map, chan->base + LPG_LO_IDX_REG, lo_idx);
+
+ regmap_bulk_write(lpg->map, chan->base + LPG_RAMP_DURATION_REG, &step, sizeof(step));
+ regmap_write(lpg->map, chan->base + LPG_HI_PAUSE_REG, hi_pause);
+ regmap_write(lpg->map, chan->base + LPG_LO_PAUSE_REG, lo_pause);
+}
+
+#define LPG_ENABLE_CONTROL_OUTPUT BIT(7)
+#define LPG_ENABLE_CONTROL_BUFFER_TRISTATE BIT(5)
+#define LPG_ENABLE_CONTROL_SRC_PWM BIT(2)
+#define LPG_ENABLE_CONTROL_RAMP_GEN BIT(1)
+
+static void lpg_apply_control(struct lpg_channel *chan)
+{
+ unsigned int ctrl;
+ struct lpg *lpg = chan->lpg;
+
+ ctrl = LPG_ENABLE_CONTROL_BUFFER_TRISTATE;
+
+ if (chan->enabled)
+ ctrl |= LPG_ENABLE_CONTROL_OUTPUT;
+
+ if (chan->pattern_lo_idx != chan->pattern_hi_idx)
+ ctrl |= LPG_ENABLE_CONTROL_RAMP_GEN;
+ else
+ ctrl |= LPG_ENABLE_CONTROL_SRC_PWM;
+
+ regmap_write(lpg->map, chan->base + PWM_ENABLE_CONTROL_REG, ctrl);
+
+ /*
+ * Due to LPG hardware bug, in the PWM mode, having enabled PWM,
+ * We have to write PWM values one more time.
+ */
+ if (chan->enabled)
+ lpg_apply_pwm_value(chan);
+}
+
+#define LPG_SYNC_PWM BIT(0)
+
+static void lpg_apply_sync(struct lpg_channel *chan)
+{
+ struct lpg *lpg = chan->lpg;
+
+ regmap_write(lpg->map, chan->base + PWM_SYNC_REG, LPG_SYNC_PWM);
+}
+
+static int lpg_parse_dtest(struct lpg *lpg)
+{
+ struct lpg_channel *chan;
+ struct device_node *np = lpg->dev->of_node;
+ int count;
+ int ret;
+ int i;
+
+ count = of_property_count_u32_elems(np, "qcom,dtest");
+ if (count == -EINVAL) {
+ return 0;
+ } else if (count < 0) {
+ ret = count;
+ goto err_malformed;
+ } else if (count != lpg->data->num_channels * 2) {
+ dev_err(lpg->dev, "qcom,dtest needs to be %d items\n",
+ lpg->data->num_channels * 2);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < lpg->data->num_channels; i++) {
+ chan = &lpg->channels[i];
+
+ ret = of_property_read_u32_index(np, "qcom,dtest", i * 2,
+ &chan->dtest_line);
+ if (ret)
+ goto err_malformed;
+
+ ret = of_property_read_u32_index(np, "qcom,dtest", i * 2 + 1,
+ &chan->dtest_value);
+ if (ret)
+ goto err_malformed;
+ }
+
+ return 0;
+
+err_malformed:
+ dev_err(lpg->dev, "malformed qcom,dtest\n");
+ return ret;
+}
+
+static void lpg_apply_dtest(struct lpg_channel *chan)
+{
+ struct lpg *lpg = chan->lpg;
+
+ if (!chan->dtest_line)
+ return;
+
+ regmap_write(lpg->map, chan->base + PWM_SEC_ACCESS_REG, 0xa5);
+ regmap_write(lpg->map, chan->base + PWM_DTEST_REG(chan->dtest_line),
+ chan->dtest_value);
+}
+
+static void lpg_apply(struct lpg_channel *chan)
+{
+ lpg_disable_glitch(chan);
+ lpg_apply_freq(chan);
+ lpg_apply_pwm_value(chan);
+ lpg_apply_control(chan);
+ lpg_apply_sync(chan);
+ lpg_apply_lut_control(chan);
+ lpg_enable_glitch(chan);
+}
+
+static void lpg_brightness_set(struct lpg_led *led, struct led_classdev *cdev,
+ struct mc_subled *subleds)
+{
+ enum led_brightness brightness;
+ struct lpg_channel *chan;
+ unsigned int triled_enabled = 0;
+ unsigned int triled_mask = 0;
+ unsigned int lut_mask = 0;
+ unsigned int duty;
+ struct lpg *lpg = led->lpg;
+ int i;
+
+ for (i = 0; i < led->num_channels; i++) {
+ chan = led->channels[i];
+ brightness = subleds[i].brightness;
+
+ if (brightness == LED_OFF) {
+ chan->enabled = false;
+ chan->ramp_enabled = false;
+ } else if (chan->pattern_lo_idx != chan->pattern_hi_idx) {
+ lpg_calc_freq(chan, NSEC_PER_MSEC);
+
+ chan->enabled = true;
+ chan->ramp_enabled = true;
+
+ lut_mask |= chan->lut_mask;
+ triled_enabled |= chan->triled_mask;
+ } else {
+ lpg_calc_freq(chan, NSEC_PER_MSEC);
+
+ duty = div_u64(brightness * chan->period, cdev->max_brightness);
+ lpg_calc_duty(chan, duty);
+ chan->enabled = true;
+ chan->ramp_enabled = false;
+
+ triled_enabled |= chan->triled_mask;
+ }
+
+ triled_mask |= chan->triled_mask;
+
+ lpg_apply(chan);
+ }
+
+ /* Toggle triled lines */
+ if (triled_mask)
+ triled_set(lpg, triled_mask, triled_enabled);
+
+ /* Trigger start of ramp generator(s) */
+ if (lut_mask)
+ lpg_lut_sync(lpg, lut_mask);
+}
+
+static int lpg_brightness_single_set(struct led_classdev *cdev,
+ enum led_brightness value)
+{
+ struct lpg_led *led = container_of(cdev, struct lpg_led, cdev);
+ struct mc_subled info;
+
+ mutex_lock(&led->lpg->lock);
+
+ info.brightness = value;
+ lpg_brightness_set(led, cdev, &info);
+
+ mutex_unlock(&led->lpg->lock);
+
+ return 0;
+}
+
+static int lpg_brightness_mc_set(struct led_classdev *cdev,
+ enum led_brightness value)
+{
+ struct led_classdev_mc *mc = lcdev_to_mccdev(cdev);
+ struct lpg_led *led = container_of(mc, struct lpg_led, mcdev);
+
+ mutex_lock(&led->lpg->lock);
+
+ led_mc_calc_color_components(mc, value);
+ lpg_brightness_set(led, cdev, mc->subled_info);
+
+ mutex_unlock(&led->lpg->lock);
+
+ return 0;
+}
+
+static int lpg_blink_set(struct lpg_led *led,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ struct lpg_channel *chan;
+ unsigned int period;
+ unsigned int triled_mask = 0;
+ struct lpg *lpg = led->lpg;
+ u64 duty;
+ int i;
+
+ if (!*delay_on && !*delay_off) {
+ *delay_on = 500;
+ *delay_off = 500;
+ }
+
+ duty = *delay_on * NSEC_PER_MSEC;
+ period = (*delay_on + *delay_off) * NSEC_PER_MSEC;
+
+ for (i = 0; i < led->num_channels; i++) {
+ chan = led->channels[i];
+
+ lpg_calc_freq(chan, period);
+ lpg_calc_duty(chan, duty);
+
+ chan->enabled = true;
+ chan->ramp_enabled = false;
+
+ triled_mask |= chan->triled_mask;
+
+ lpg_apply(chan);
+ }
+
+ /* Enable triled lines */
+ triled_set(lpg, triled_mask, triled_mask);
+
+ chan = led->channels[0];
+ duty = div_u64(chan->pwm_value * chan->period, LPG_RESOLUTION);
+ *delay_on = div_u64(duty, NSEC_PER_MSEC);
+ *delay_off = div_u64(chan->period - duty, NSEC_PER_MSEC);
+
+ return 0;
+}
+
+static int lpg_blink_single_set(struct led_classdev *cdev,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ struct lpg_led *led = container_of(cdev, struct lpg_led, cdev);
+ int ret;
+
+ mutex_lock(&led->lpg->lock);
+
+ ret = lpg_blink_set(led, delay_on, delay_off);
+
+ mutex_unlock(&led->lpg->lock);
+
+ return ret;
+}
+
+static int lpg_blink_mc_set(struct led_classdev *cdev,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ struct led_classdev_mc *mc = lcdev_to_mccdev(cdev);
+ struct lpg_led *led = container_of(mc, struct lpg_led, mcdev);
+ int ret;
+
+ mutex_lock(&led->lpg->lock);
+
+ ret = lpg_blink_set(led, delay_on, delay_off);
+
+ mutex_unlock(&led->lpg->lock);
+
+ return ret;
+}
+
+static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern,
+ u32 len, int repeat)
+{
+ struct lpg_channel *chan;
+ struct lpg *lpg = led->lpg;
+ struct led_pattern *pattern;
+ unsigned int brightness_a;
+ unsigned int brightness_b;
+ unsigned int actual_len;
+ unsigned int hi_pause;
+ unsigned int lo_pause;
+ unsigned int delta_t;
+ unsigned int lo_idx;
+ unsigned int hi_idx;
+ unsigned int i;
+ bool ping_pong = true;
+ int ret = -EINVAL;
+
+ /* Hardware only support oneshot or indefinite loops */
+ if (repeat != -1 && repeat != 1)
+ return -EINVAL;
+
+ /*
+ * The standardized leds-trigger-pattern format defines that the
+ * brightness of the LED follows a linear transition from one entry
+ * in the pattern to the next, over the given delta_t time. It
+ * describes that the way to perform instant transitions a zero-length
+ * entry should be added following a pattern entry.
+ *
+ * The LPG hardware is only able to perform the latter (no linear
+ * transitions), so require each entry in the pattern to be followed by
+ * a zero-length transition.
+ */
+ if (len % 2)
+ return -EINVAL;
+
+ pattern = kcalloc(len / 2, sizeof(*pattern), GFP_KERNEL);
+ if (!pattern)
+ return -ENOMEM;
+
+ for (i = 0; i < len; i += 2) {
+ if (led_pattern[i].brightness != led_pattern[i + 1].brightness)
+ goto out_free_pattern;
+ if (led_pattern[i + 1].delta_t != 0)
+ goto out_free_pattern;
+
+ pattern[i / 2].brightness = led_pattern[i].brightness;
+ pattern[i / 2].delta_t = led_pattern[i].delta_t;
+ }
+
+ len /= 2;
+
+ /*
+ * Specifying a pattern of length 1 causes the hardware to iterate
+ * through the entire LUT, so prohibit this.
+ */
+ if (len < 2)
+ goto out_free_pattern;
+
+ /*
+ * The LPG plays patterns with at a fixed pace, a "low pause" can be
+ * used to stretch the first delay of the pattern and a "high pause"
+ * the last one.
+ *
+ * In order to save space the pattern can be played in "ping pong"
+ * mode, in which the pattern is first played forward, then "high
+ * pause" is applied, then the pattern is played backwards and finally
+ * the "low pause" is applied.
+ *
+ * The middle elements of the pattern are used to determine delta_t and
+ * the "low pause" and "high pause" multipliers are derrived from this.
+ *
+ * The first element in the pattern is used to determine "low pause".
+ *
+ * If the specified pattern is a palindrome the ping pong mode is
+ * enabled. In this scenario the delta_t of the middle entry (i.e. the
+ * last in the programmed pattern) determines the "high pause".
+ */
+
+ /* Detect palindromes and use "ping pong" to reduce LUT usage */
+ for (i = 0; i < len / 2; i++) {
+ brightness_a = pattern[i].brightness;
+ brightness_b = pattern[len - i - 1].brightness;
+
+ if (brightness_a != brightness_b) {
+ ping_pong = false;
+ break;
+ }
+ }
+
+ /* The pattern length to be written to the LUT */
+ if (ping_pong)
+ actual_len = (len + 1) / 2;
+ else
+ actual_len = len;
+
+ /*
+ * Validate that all delta_t in the pattern are the same, with the
+ * exception of the middle element in case of ping_pong.
+ */
+ delta_t = pattern[1].delta_t;
+ for (i = 2; i < len; i++) {
+ if (pattern[i].delta_t != delta_t) {
+ /*
+ * Allow last entry in the full or shortened pattern to
+ * specify hi pause. Reject other variations.
+ */
+ if (i != actual_len - 1)
+ goto out_free_pattern;
+ }
+ }
+
+ /* LPG_RAMP_DURATION_REG is a 9bit */
+ if (delta_t >= BIT(9))
+ goto out_free_pattern;
+
+ /* Find "low pause" and "high pause" in the pattern */
+ lo_pause = pattern[0].delta_t;
+ hi_pause = pattern[actual_len - 1].delta_t;
+
+ mutex_lock(&lpg->lock);
+ ret = lpg_lut_store(lpg, pattern, actual_len, &lo_idx, &hi_idx);
+ if (ret < 0)
+ goto out_unlock;
+
+ for (i = 0; i < led->num_channels; i++) {
+ chan = led->channels[i];
+
+ chan->ramp_tick_ms = delta_t;
+ chan->ramp_ping_pong = ping_pong;
+ chan->ramp_oneshot = repeat != -1;
+
+ chan->ramp_lo_pause_ms = lo_pause;
+ chan->ramp_hi_pause_ms = hi_pause;
+
+ chan->pattern_lo_idx = lo_idx;
+ chan->pattern_hi_idx = hi_idx;
+ }
+
+out_unlock:
+ mutex_unlock(&lpg->lock);
+out_free_pattern:
+ kfree(pattern);
+
+ return ret;
+}
+
+static int lpg_pattern_single_set(struct led_classdev *cdev,
+ struct led_pattern *pattern, u32 len,
+ int repeat)
+{
+ struct lpg_led *led = container_of(cdev, struct lpg_led, cdev);
+ int ret;
+
+ ret = lpg_pattern_set(led, pattern, len, repeat);
+ if (ret < 0)
+ return ret;
+
+ lpg_brightness_single_set(cdev, LED_FULL);
+
+ return 0;
+}
+
+static int lpg_pattern_mc_set(struct led_classdev *cdev,
+ struct led_pattern *pattern, u32 len,
+ int repeat)
+{
+ struct led_classdev_mc *mc = lcdev_to_mccdev(cdev);
+ struct lpg_led *led = container_of(mc, struct lpg_led, mcdev);
+ int ret;
+
+ ret = lpg_pattern_set(led, pattern, len, repeat);
+ if (ret < 0)
+ return ret;
+
+ led_mc_calc_color_components(mc, LED_FULL);
+ lpg_brightness_set(led, cdev, mc->subled_info);
+
+ return 0;
+}
+
+static int lpg_pattern_clear(struct lpg_led *led)
+{
+ struct lpg_channel *chan;
+ struct lpg *lpg = led->lpg;
+ int i;
+
+ mutex_lock(&lpg->lock);
+
+ chan = led->channels[0];
+ lpg_lut_free(lpg, chan->pattern_lo_idx, chan->pattern_hi_idx);
+
+ for (i = 0; i < led->num_channels; i++) {
+ chan = led->channels[i];
+ chan->pattern_lo_idx = 0;
+ chan->pattern_hi_idx = 0;
+ }
+
+ mutex_unlock(&lpg->lock);
+
+ return 0;
+}
+
+static int lpg_pattern_single_clear(struct led_classdev *cdev)
+{
+ struct lpg_led *led = container_of(cdev, struct lpg_led, cdev);
+
+ return lpg_pattern_clear(led);
+}
+
+static int lpg_pattern_mc_clear(struct led_classdev *cdev)
+{
+ struct led_classdev_mc *mc = lcdev_to_mccdev(cdev);
+ struct lpg_led *led = container_of(mc, struct lpg_led, mcdev);
+
+ return lpg_pattern_clear(led);
+}
+
+static int lpg_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+ struct lpg *lpg = container_of(chip, struct lpg, pwm);
+ struct lpg_channel *chan = &lpg->channels[pwm->hwpwm];
+
+ return chan->in_use ? -EBUSY : 0;
+}
+
+/*
+ * Limitations:
+ * - Updating both duty and period is not done atomically, so the output signal
+ * will momentarily be a mix of the settings.
+ * - Changed parameters takes effect immediately.
+ * - A disabled channel outputs a logical 0.
+ */
+static int lpg_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ const struct pwm_state *state)
+{
+ struct lpg *lpg = container_of(chip, struct lpg, pwm);
+ struct lpg_channel *chan = &lpg->channels[pwm->hwpwm];
+ int ret = 0;
+
+ if (state->polarity != PWM_POLARITY_NORMAL)
+ return -EINVAL;
+
+ mutex_lock(&lpg->lock);
+
+ if (state->enabled) {
+ ret = lpg_calc_freq(chan, state->period);
+ if (ret < 0)
+ goto out_unlock;
+
+ lpg_calc_duty(chan, state->duty_cycle);
+ }
+ chan->enabled = state->enabled;
+
+ lpg_apply(chan);
+
+ triled_set(lpg, chan->triled_mask, chan->enabled ? chan->triled_mask : 0);
+
+out_unlock:
+ mutex_unlock(&lpg->lock);
+
+ return ret;
+}
+
+static int lpg_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
+ struct pwm_state *state)
+{
+ struct lpg *lpg = container_of(chip, struct lpg, pwm);
+ struct lpg_channel *chan = &lpg->channels[pwm->hwpwm];
+ unsigned int pre_div;
+ unsigned int refclk;
+ unsigned int val;
+ unsigned int m;
+ u16 pwm_value;
+ int ret;
+
+ ret = regmap_read(lpg->map, chan->base + LPG_SIZE_CLK_REG, &val);
+ if (ret)
+ return 0;
+
+ refclk = lpg_clk_rates[val & PWM_CLK_SELECT_MASK];
+ if (refclk) {
+ ret = regmap_read(lpg->map, chan->base + LPG_PREDIV_CLK_REG, &val);
+ if (ret)
+ return 0;
+
+ pre_div = lpg_pre_divs[FIELD_GET(PWM_FREQ_PRE_DIV_MASK, val)];
+ m = FIELD_GET(PWM_FREQ_EXP_MASK, val);
+
+ ret = regmap_bulk_read(lpg->map, chan->base + PWM_VALUE_REG, &pwm_value, sizeof(pwm_value));
+ if (ret)
+ return 0;
+
+ state->period = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC * LPG_RESOLUTION * pre_div * (1 << m), refclk);
+ state->duty_cycle = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC * pwm_value * pre_div * (1 << m), refclk);
+ } else {
+ state->period = 0;
+ state->duty_cycle = 0;
+ }
+
+ ret = regmap_read(lpg->map, chan->base + PWM_ENABLE_CONTROL_REG, &val);
+ if (ret)
+ return 0;
+
+ state->enabled = FIELD_GET(LPG_ENABLE_CONTROL_OUTPUT, val);
+ state->polarity = PWM_POLARITY_NORMAL;
+
+ if (state->duty_cycle > state->period)
+ state->duty_cycle = state->period;
+
+ return 0;
+}
+
+static const struct pwm_ops lpg_pwm_ops = {
+ .request = lpg_pwm_request,
+ .apply = lpg_pwm_apply,
+ .get_state = lpg_pwm_get_state,
+ .owner = THIS_MODULE,
+};
+
+static int lpg_add_pwm(struct lpg *lpg)
+{
+ int ret;
+
+ lpg->pwm.base = -1;
+ lpg->pwm.dev = lpg->dev;
+ lpg->pwm.npwm = lpg->num_channels;
+ lpg->pwm.ops = &lpg_pwm_ops;
+
+ ret = pwmchip_add(&lpg->pwm);
+ if (ret)
+ dev_err(lpg->dev, "failed to add PWM chip: ret %d\n", ret);
+
+ return ret;
+}
+
+static int lpg_parse_channel(struct lpg *lpg, struct device_node *np,
+ struct lpg_channel **channel)
+{
+ struct lpg_channel *chan;
+ u32 color = LED_COLOR_ID_GREEN;
+ u32 reg;
+ int ret;
+
+ ret = of_property_read_u32(np, "reg", &reg);
+ if (ret || !reg || reg > lpg->num_channels) {
+ dev_err(lpg->dev, "invalid \"reg\" of %pOFn\n", np);
+ return -EINVAL;
+ }
+
+ chan = &lpg->channels[reg - 1];
+ chan->in_use = true;
+
+ ret = of_property_read_u32(np, "color", &color);
+ if (ret < 0 && ret != -EINVAL) {
+ dev_err(lpg->dev, "failed to parse \"color\" of %pOF\n", np);
+ return ret;
+ }
+
+ chan->color = color;
+
+ *channel = chan;
+
+ return 0;
+}
+
+static int lpg_add_led(struct lpg *lpg, struct device_node *np)
+{
+ struct led_init_data init_data = {};
+ struct led_classdev *cdev;
+ struct device_node *child;
+ struct mc_subled *info;
+ struct lpg_led *led;
+ const char *state;
+ int num_channels;
+ u32 color = 0;
+ int ret;
+ int i;
+
+ ret = of_property_read_u32(np, "color", &color);
+ if (ret < 0 && ret != -EINVAL) {
+ dev_err(lpg->dev, "failed to parse \"color\" of %pOF\n", np);
+ return ret;
+ }
+
+ if (color == LED_COLOR_ID_RGB)
+ num_channels = of_get_available_child_count(np);
+ else
+ num_channels = 1;
+
+ led = devm_kzalloc(lpg->dev, struct_size(led, channels, num_channels), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->lpg = lpg;
+ led->num_channels = num_channels;
+
+ if (color == LED_COLOR_ID_RGB) {
+ info = devm_kcalloc(lpg->dev, num_channels, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+ i = 0;
+ for_each_available_child_of_node(np, child) {
+ ret = lpg_parse_channel(lpg, child, &led->channels[i]);
+ if (ret < 0) {
+ of_node_put(child);
+ return ret;
+ }
+
+ info[i].color_index = led->channels[i]->color;
+ info[i].intensity = 0;
+ i++;
+ }
+
+ led->mcdev.subled_info = info;
+ led->mcdev.num_colors = num_channels;
+
+ cdev = &led->mcdev.led_cdev;
+ cdev->brightness_set_blocking = lpg_brightness_mc_set;
+ cdev->blink_set = lpg_blink_mc_set;
+
+ /* Register pattern accessors only if we have a LUT block */
+ if (lpg->lut_base) {
+ cdev->pattern_set = lpg_pattern_mc_set;
+ cdev->pattern_clear = lpg_pattern_mc_clear;
+ }
+ } else {
+ ret = lpg_parse_channel(lpg, np, &led->channels[0]);
+ if (ret < 0)
+ return ret;
+
+ cdev = &led->cdev;
+ cdev->brightness_set_blocking = lpg_brightness_single_set;
+ cdev->blink_set = lpg_blink_single_set;
+
+ /* Register pattern accessors only if we have a LUT block */
+ if (lpg->lut_base) {
+ cdev->pattern_set = lpg_pattern_single_set;
+ cdev->pattern_clear = lpg_pattern_single_clear;
+ }
+ }
+
+ cdev->default_trigger = of_get_property(np, "linux,default-trigger", NULL);
+ cdev->max_brightness = LPG_RESOLUTION - 1;
+
+ if (!of_property_read_string(np, "default-state", &state) &&
+ !strcmp(state, "on"))
+ cdev->brightness = cdev->max_brightness;
+ else
+ cdev->brightness = LED_OFF;
+
+ cdev->brightness_set_blocking(cdev, cdev->brightness);
+
+ init_data.fwnode = of_fwnode_handle(np);
+
+ if (color == LED_COLOR_ID_RGB)
+ ret = devm_led_classdev_multicolor_register_ext(lpg->dev, &led->mcdev, &init_data);
+ else
+ ret = devm_led_classdev_register_ext(lpg->dev, &led->cdev, &init_data);
+ if (ret)
+ dev_err(lpg->dev, "unable to register %s\n", cdev->name);
+
+ return ret;
+}
+
+static int lpg_init_channels(struct lpg *lpg)
+{
+ const struct lpg_data *data = lpg->data;
+ struct lpg_channel *chan;
+ int i;
+
+ lpg->num_channels = data->num_channels;
+ lpg->channels = devm_kcalloc(lpg->dev, data->num_channels,
+ sizeof(struct lpg_channel), GFP_KERNEL);
+ if (!lpg->channels)
+ return -ENOMEM;
+
+ for (i = 0; i < data->num_channels; i++) {
+ chan = &lpg->channels[i];
+
+ chan->lpg = lpg;
+ chan->base = data->channels[i].base;
+ chan->triled_mask = data->channels[i].triled_mask;
+ chan->lut_mask = BIT(i);
+
+ regmap_read(lpg->map, chan->base + LPG_SUBTYPE_REG, &chan->subtype);
+ }
+
+ return 0;
+}
+
+static int lpg_init_triled(struct lpg *lpg)
+{
+ struct device_node *np = lpg->dev->of_node;
+ int ret;
+
+ /* Skip initialization if we don't have a triled block */
+ if (!lpg->data->triled_base)
+ return 0;
+
+ lpg->triled_base = lpg->data->triled_base;
+ lpg->triled_has_atc_ctl = lpg->data->triled_has_atc_ctl;
+ lpg->triled_has_src_sel = lpg->data->triled_has_src_sel;
+
+ if (lpg->triled_has_src_sel) {
+ ret = of_property_read_u32(np, "qcom,power-source", &lpg->triled_src);
+ if (ret || lpg->triled_src == 2 || lpg->triled_src > 3) {
+ dev_err(lpg->dev, "invalid power source\n");
+ return -EINVAL;
+ }
+ }
+
+ /* Disable automatic trickle charge LED */
+ if (lpg->triled_has_atc_ctl)
+ regmap_write(lpg->map, lpg->triled_base + TRI_LED_ATC_CTL, 0);
+
+ /* Configure power source */
+ if (lpg->triled_has_src_sel)
+ regmap_write(lpg->map, lpg->triled_base + TRI_LED_SRC_SEL, lpg->triled_src);
+
+ /* Default all outputs to off */
+ regmap_write(lpg->map, lpg->triled_base + TRI_LED_EN_CTL, 0);
+
+ return 0;
+}
+
+static int lpg_init_lut(struct lpg *lpg)
+{
+ const struct lpg_data *data = lpg->data;
+
+ if (!data->lut_base)
+ return 0;
+
+ lpg->lut_base = data->lut_base;
+ lpg->lut_size = data->lut_size;
+
+ lpg->lut_bitmap = devm_bitmap_zalloc(lpg->dev, lpg->lut_size, GFP_KERNEL);
+ if (!lpg->lut_bitmap)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int lpg_probe(struct platform_device *pdev)
+{
+ struct device_node *np;
+ struct lpg *lpg;
+ int ret;
+ int i;
+
+ lpg = devm_kzalloc(&pdev->dev, sizeof(*lpg), GFP_KERNEL);
+ if (!lpg)
+ return -ENOMEM;
+
+ lpg->data = of_device_get_match_data(&pdev->dev);
+ if (!lpg->data)
+ return -EINVAL;
+
+ platform_set_drvdata(pdev, lpg);
+
+ lpg->dev = &pdev->dev;
+ mutex_init(&lpg->lock);
+
+ lpg->map = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!lpg->map)
+ return dev_err_probe(&pdev->dev, -ENXIO, "parent regmap unavailable\n");
+
+ ret = lpg_init_channels(lpg);
+ if (ret < 0)
+ return ret;
+
+ ret = lpg_parse_dtest(lpg);
+ if (ret < 0)
+ return ret;
+
+ ret = lpg_init_triled(lpg);
+ if (ret < 0)
+ return ret;
+
+ ret = lpg_init_lut(lpg);
+ if (ret < 0)
+ return ret;
+
+ for_each_available_child_of_node(pdev->dev.of_node, np) {
+ ret = lpg_add_led(lpg, np);
+ if (ret) {
+ of_node_put(np);
+ return ret;
+ }
+ }
+
+ for (i = 0; i < lpg->num_channels; i++)
+ lpg_apply_dtest(&lpg->channels[i]);
+
+ return lpg_add_pwm(lpg);
+}
+
+static int lpg_remove(struct platform_device *pdev)
+{
+ struct lpg *lpg = platform_get_drvdata(pdev);
+
+ pwmchip_remove(&lpg->pwm);
+
+ return 0;
+}
+
+static const struct lpg_data pm8916_pwm_data = {
+ .num_channels = 1,
+ .channels = (const struct lpg_channel_data[]) {
+ { .base = 0xbc00 },
+ },
+};
+
+static const struct lpg_data pm8941_lpg_data = {
+ .lut_base = 0xb000,
+ .lut_size = 64,
+
+ .triled_base = 0xd000,
+ .triled_has_atc_ctl = true,
+ .triled_has_src_sel = true,
+
+ .num_channels = 8,
+ .channels = (const struct lpg_channel_data[]) {
+ { .base = 0xb100 },
+ { .base = 0xb200 },
+ { .base = 0xb300 },
+ { .base = 0xb400 },
+ { .base = 0xb500, .triled_mask = BIT(5) },
+ { .base = 0xb600, .triled_mask = BIT(6) },
+ { .base = 0xb700, .triled_mask = BIT(7) },
+ { .base = 0xb800 },
+ },
+};
+
+static const struct lpg_data pm8994_lpg_data = {
+ .lut_base = 0xb000,
+ .lut_size = 64,
+
+ .num_channels = 6,
+ .channels = (const struct lpg_channel_data[]) {
+ { .base = 0xb100 },
+ { .base = 0xb200 },
+ { .base = 0xb300 },
+ { .base = 0xb400 },
+ { .base = 0xb500 },
+ { .base = 0xb600 },
+ },
+};
+
+static const struct lpg_data pmi8994_lpg_data = {
+ .lut_base = 0xb000,
+ .lut_size = 24,
+
+ .triled_base = 0xd000,
+ .triled_has_atc_ctl = true,
+ .triled_has_src_sel = true,
+
+ .num_channels = 4,
+ .channels = (const struct lpg_channel_data[]) {
+ { .base = 0xb100, .triled_mask = BIT(5) },
+ { .base = 0xb200, .triled_mask = BIT(6) },
+ { .base = 0xb300, .triled_mask = BIT(7) },
+ { .base = 0xb400 },
+ },
+};
+
+static const struct lpg_data pmi8998_lpg_data = {
+ .lut_base = 0xb000,
+ .lut_size = 49,
+
+ .triled_base = 0xd000,
+
+ .num_channels = 6,
+ .channels = (const struct lpg_channel_data[]) {
+ { .base = 0xb100 },
+ { .base = 0xb200 },
+ { .base = 0xb300, .triled_mask = BIT(5) },
+ { .base = 0xb400, .triled_mask = BIT(6) },
+ { .base = 0xb500, .triled_mask = BIT(7) },
+ { .base = 0xb600 },
+ },
+};
+
+static const struct lpg_data pm8150b_lpg_data = {
+ .lut_base = 0xb000,
+ .lut_size = 24,
+
+ .triled_base = 0xd000,
+
+ .num_channels = 2,
+ .channels = (const struct lpg_channel_data[]) {
+ { .base = 0xb100, .triled_mask = BIT(7) },
+ { .base = 0xb200, .triled_mask = BIT(6) },
+ },
+};
+
+static const struct lpg_data pm8150l_lpg_data = {
+ .lut_base = 0xb000,
+ .lut_size = 48,
+
+ .triled_base = 0xd000,
+
+ .num_channels = 5,
+ .channels = (const struct lpg_channel_data[]) {
+ { .base = 0xb100, .triled_mask = BIT(7) },
+ { .base = 0xb200, .triled_mask = BIT(6) },
+ { .base = 0xb300, .triled_mask = BIT(5) },
+ { .base = 0xbc00 },
+ { .base = 0xbd00 },
+
+ },
+};
+
+static const struct lpg_data pm8350c_pwm_data = {
+ .triled_base = 0xef00,
+
+ .num_channels = 4,
+ .channels = (const struct lpg_channel_data[]) {
+ { .base = 0xe800, .triled_mask = BIT(7) },
+ { .base = 0xe900, .triled_mask = BIT(6) },
+ { .base = 0xea00, .triled_mask = BIT(5) },
+ { .base = 0xeb00 },
+ },
+};
+
+static const struct of_device_id lpg_of_table[] = {
+ { .compatible = "qcom,pm8150b-lpg", .data = &pm8150b_lpg_data },
+ { .compatible = "qcom,pm8150l-lpg", .data = &pm8150l_lpg_data },
+ { .compatible = "qcom,pm8350c-pwm", .data = &pm8350c_pwm_data },
+ { .compatible = "qcom,pm8916-pwm", .data = &pm8916_pwm_data },
+ { .compatible = "qcom,pm8941-lpg", .data = &pm8941_lpg_data },
+ { .compatible = "qcom,pm8994-lpg", .data = &pm8994_lpg_data },
+ { .compatible = "qcom,pmi8994-lpg", .data = &pmi8994_lpg_data },
+ { .compatible = "qcom,pmi8998-lpg", .data = &pmi8998_lpg_data },
+ { .compatible = "qcom,pmc8180c-lpg", .data = &pm8150l_lpg_data },
+ {}
+};
+MODULE_DEVICE_TABLE(of, lpg_of_table);
+
+static struct platform_driver lpg_driver = {
+ .probe = lpg_probe,
+ .remove = lpg_remove,
+ .driver = {
+ .name = "qcom-spmi-lpg",
+ .of_match_table = lpg_of_table,
+ },
+};
+module_platform_driver(lpg_driver);
+
+MODULE_DESCRIPTION("Qualcomm LPG LED driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/simple/Kconfig b/drivers/leds/simple/Kconfig
new file mode 100644
index 000000000..fd2b8225d
--- /dev/null
+++ b/drivers/leds/simple/Kconfig
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config LEDS_SIEMENS_SIMATIC_IPC
+ tristate "LED driver for Siemens Simatic IPCs"
+ depends on LEDS_GPIO
+ depends on SIEMENS_SIMATIC_IPC
+ help
+ This option enables support for the LEDs of several Industrial PCs
+ from Siemens.
+
+ To compile this driver as a module, choose M here: the modules
+ will be called simatic-ipc-leds and simatic-ipc-leds-gpio.
diff --git a/drivers/leds/simple/Makefile b/drivers/leds/simple/Makefile
new file mode 100644
index 000000000..1c7ef5e13
--- /dev/null
+++ b/drivers/leds/simple/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC) += simatic-ipc-leds.o
+obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC) += simatic-ipc-leds-gpio.o
diff --git a/drivers/leds/simple/simatic-ipc-leds-gpio.c b/drivers/leds/simple/simatic-ipc-leds-gpio.c
new file mode 100644
index 000000000..e8d329b5a
--- /dev/null
+++ b/drivers/leds/simple/simatic-ipc-leds-gpio.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Siemens SIMATIC IPC driver for GPIO based LEDs
+ *
+ * Copyright (c) Siemens AG, 2022
+ *
+ * Authors:
+ * Henning Schild <henning.schild@siemens.com>
+ */
+
+#include <linux/gpio/machine.h>
+#include <linux/gpio/consumer.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/x86/simatic-ipc-base.h>
+
+static struct gpiod_lookup_table *simatic_ipc_led_gpio_table;
+
+static struct gpiod_lookup_table simatic_ipc_led_gpio_table_127e = {
+ .dev_id = "leds-gpio",
+ .table = {
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 52, NULL, 0, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 53, NULL, 1, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 57, NULL, 2, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 58, NULL, 3, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 60, NULL, 4, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 51, NULL, 5, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 56, NULL, 6, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 59, NULL, 7, GPIO_ACTIVE_HIGH),
+ },
+};
+
+static struct gpiod_lookup_table simatic_ipc_led_gpio_table_227g = {
+ .dev_id = "leds-gpio",
+ .table = {
+ GPIO_LOOKUP_IDX("gpio-f7188x-2", 0, NULL, 0, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("gpio-f7188x-2", 1, NULL, 1, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("gpio-f7188x-2", 2, NULL, 2, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("gpio-f7188x-2", 3, NULL, 3, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("gpio-f7188x-2", 4, NULL, 4, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("gpio-f7188x-2", 5, NULL, 5, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("gpio-f7188x-3", 6, NULL, 6, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP_IDX("gpio-f7188x-3", 7, NULL, 7, GPIO_ACTIVE_HIGH),
+ }
+};
+
+static const struct gpio_led simatic_ipc_gpio_leds[] = {
+ { .name = "red:" LED_FUNCTION_STATUS "-1" },
+ { .name = "green:" LED_FUNCTION_STATUS "-1" },
+ { .name = "red:" LED_FUNCTION_STATUS "-2" },
+ { .name = "green:" LED_FUNCTION_STATUS "-2" },
+ { .name = "red:" LED_FUNCTION_STATUS "-3" },
+ { .name = "green:" LED_FUNCTION_STATUS "-3" },
+};
+
+static const struct gpio_led_platform_data simatic_ipc_gpio_leds_pdata = {
+ .num_leds = ARRAY_SIZE(simatic_ipc_gpio_leds),
+ .leds = simatic_ipc_gpio_leds,
+};
+
+static struct platform_device *simatic_leds_pdev;
+
+static int simatic_ipc_leds_gpio_remove(struct platform_device *pdev)
+{
+ gpiod_remove_lookup_table(simatic_ipc_led_gpio_table);
+ platform_device_unregister(simatic_leds_pdev);
+
+ return 0;
+}
+
+static int simatic_ipc_leds_gpio_probe(struct platform_device *pdev)
+{
+ const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
+ struct gpio_desc *gpiod;
+ int err;
+
+ switch (plat->devmode) {
+ case SIMATIC_IPC_DEVICE_127E:
+ if (!IS_ENABLED(CONFIG_PINCTRL_BROXTON))
+ return -ENODEV;
+ simatic_ipc_led_gpio_table = &simatic_ipc_led_gpio_table_127e;
+ break;
+ case SIMATIC_IPC_DEVICE_227G:
+ if (!IS_ENABLED(CONFIG_GPIO_F7188X))
+ return -ENODEV;
+ request_module("gpio-f7188x");
+ simatic_ipc_led_gpio_table = &simatic_ipc_led_gpio_table_227g;
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ gpiod_add_lookup_table(simatic_ipc_led_gpio_table);
+ simatic_leds_pdev = platform_device_register_resndata(NULL,
+ "leds-gpio", PLATFORM_DEVID_NONE, NULL, 0,
+ &simatic_ipc_gpio_leds_pdata,
+ sizeof(simatic_ipc_gpio_leds_pdata));
+ if (IS_ERR(simatic_leds_pdev)) {
+ err = PTR_ERR(simatic_leds_pdev);
+ goto out;
+ }
+
+ /* PM_BIOS_BOOT_N */
+ gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 6, GPIOD_OUT_LOW);
+ if (IS_ERR(gpiod)) {
+ err = PTR_ERR(gpiod);
+ goto out;
+ }
+ gpiod_put(gpiod);
+
+ /* PM_WDT_OUT */
+ gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 7, GPIOD_OUT_LOW);
+ if (IS_ERR(gpiod)) {
+ err = PTR_ERR(gpiod);
+ goto out;
+ }
+ gpiod_put(gpiod);
+
+ return 0;
+out:
+ simatic_ipc_leds_gpio_remove(pdev);
+
+ return err;
+}
+
+static struct platform_driver simatic_ipc_led_gpio_driver = {
+ .probe = simatic_ipc_leds_gpio_probe,
+ .remove = simatic_ipc_leds_gpio_remove,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ }
+};
+module_platform_driver(simatic_ipc_led_gpio_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" KBUILD_MODNAME);
+MODULE_SOFTDEP("pre: platform:leds-gpio");
+MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>");
diff --git a/drivers/leds/simple/simatic-ipc-leds.c b/drivers/leds/simple/simatic-ipc-leds.c
new file mode 100644
index 000000000..4894c228c
--- /dev/null
+++ b/drivers/leds/simple/simatic-ipc-leds.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Siemens SIMATIC IPC driver for LEDs
+ *
+ * Copyright (c) Siemens AG, 2018-2021
+ *
+ * Authors:
+ * Henning Schild <henning.schild@siemens.com>
+ * Jan Kiszka <jan.kiszka@siemens.com>
+ * Gerd Haeussler <gerd.haeussler.ext@siemens.com>
+ */
+
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_data/x86/simatic-ipc-base.h>
+#include <linux/platform_device.h>
+#include <linux/sizes.h>
+#include <linux/spinlock.h>
+
+#define SIMATIC_IPC_LED_PORT_BASE 0x404E
+
+struct simatic_ipc_led {
+ unsigned int value; /* mask for io */
+ char *name;
+ struct led_classdev cdev;
+};
+
+static struct simatic_ipc_led simatic_ipc_leds_io[] = {
+ {1 << 15, "green:" LED_FUNCTION_STATUS "-1" },
+ {1 << 7, "yellow:" LED_FUNCTION_STATUS "-1" },
+ {1 << 14, "red:" LED_FUNCTION_STATUS "-2" },
+ {1 << 6, "yellow:" LED_FUNCTION_STATUS "-2" },
+ {1 << 13, "red:" LED_FUNCTION_STATUS "-3" },
+ {1 << 5, "yellow:" LED_FUNCTION_STATUS "-3" },
+ { }
+};
+
+static struct resource simatic_ipc_led_io_res =
+ DEFINE_RES_IO_NAMED(SIMATIC_IPC_LED_PORT_BASE, SZ_2, KBUILD_MODNAME);
+
+static DEFINE_SPINLOCK(reg_lock);
+
+static inline struct simatic_ipc_led *cdev_to_led(struct led_classdev *led_cd)
+{
+ return container_of(led_cd, struct simatic_ipc_led, cdev);
+}
+
+static void simatic_ipc_led_set_io(struct led_classdev *led_cd,
+ enum led_brightness brightness)
+{
+ struct simatic_ipc_led *led = cdev_to_led(led_cd);
+ unsigned long flags;
+ unsigned int val;
+
+ spin_lock_irqsave(&reg_lock, flags);
+
+ val = inw(SIMATIC_IPC_LED_PORT_BASE);
+ if (brightness == LED_OFF)
+ outw(val | led->value, SIMATIC_IPC_LED_PORT_BASE);
+ else
+ outw(val & ~led->value, SIMATIC_IPC_LED_PORT_BASE);
+
+ spin_unlock_irqrestore(&reg_lock, flags);
+}
+
+static enum led_brightness simatic_ipc_led_get_io(struct led_classdev *led_cd)
+{
+ struct simatic_ipc_led *led = cdev_to_led(led_cd);
+
+ return inw(SIMATIC_IPC_LED_PORT_BASE) & led->value ? LED_OFF : led_cd->max_brightness;
+}
+
+static int simatic_ipc_leds_probe(struct platform_device *pdev)
+{
+ const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
+ struct device *dev = &pdev->dev;
+ struct simatic_ipc_led *ipcled;
+ struct led_classdev *cdev;
+ struct resource *res;
+ int err;
+
+ switch (plat->devmode) {
+ case SIMATIC_IPC_DEVICE_227D:
+ case SIMATIC_IPC_DEVICE_427E:
+ res = &simatic_ipc_led_io_res;
+ ipcled = simatic_ipc_leds_io;
+ /* on 227D the two bytes work the other way araound */
+ if (plat->devmode == SIMATIC_IPC_DEVICE_227D) {
+ while (ipcled->value) {
+ ipcled->value = swab16(ipcled->value);
+ ipcled++;
+ }
+ ipcled = simatic_ipc_leds_io;
+ }
+ if (!devm_request_region(dev, res->start, resource_size(res), KBUILD_MODNAME)) {
+ dev_err(dev, "Unable to register IO resource at %pR\n", res);
+ return -EBUSY;
+ }
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ while (ipcled->value) {
+ cdev = &ipcled->cdev;
+ cdev->brightness_set = simatic_ipc_led_set_io;
+ cdev->brightness_get = simatic_ipc_led_get_io;
+ cdev->max_brightness = LED_ON;
+ cdev->name = ipcled->name;
+
+ err = devm_led_classdev_register(dev, cdev);
+ if (err < 0)
+ return err;
+ ipcled++;
+ }
+
+ return 0;
+}
+
+static struct platform_driver simatic_ipc_led_driver = {
+ .probe = simatic_ipc_leds_probe,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ }
+};
+
+module_platform_driver(simatic_ipc_led_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" KBUILD_MODNAME);
+MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>");
diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig
new file mode 100644
index 000000000..dc6816d36
--- /dev/null
+++ b/drivers/leds/trigger/Kconfig
@@ -0,0 +1,157 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menuconfig LEDS_TRIGGERS
+ bool "LED Trigger support"
+ depends on LEDS_CLASS
+ help
+ This option enables trigger support for the leds class.
+ These triggers allow kernel events to drive the LEDs and can
+ be configured via sysfs. If unsure, say Y.
+
+if LEDS_TRIGGERS
+
+config LEDS_TRIGGER_TIMER
+ tristate "LED Timer Trigger"
+ help
+ This allows LEDs to be controlled by a programmable timer
+ via sysfs. Some LED hardware can be programmed to start
+ blinking the LED without any further software interaction.
+ For more details read Documentation/leds/leds-class.rst.
+
+ If unsure, say Y.
+
+config LEDS_TRIGGER_ONESHOT
+ tristate "LED One-shot Trigger"
+ help
+ This allows LEDs to blink in one-shot pulses with parameters
+ controlled via sysfs. It's useful to notify the user on
+ sporadic events, when there are no clear begin and end trap points,
+ or on dense events, where this blinks the LED at constant rate if
+ rearmed continuously.
+
+ It also shows how to use the led_blink_set_oneshot() function.
+
+ If unsure, say Y.
+
+config LEDS_TRIGGER_DISK
+ bool "LED Disk Trigger"
+ depends on ATA
+ help
+ This allows LEDs to be controlled by disk activity.
+ If unsure, say Y.
+
+config LEDS_TRIGGER_MTD
+ bool "LED MTD (NAND/NOR) Trigger"
+ depends on MTD
+ help
+ This allows LEDs to be controlled by MTD activity.
+ If unsure, say N.
+
+config LEDS_TRIGGER_HEARTBEAT
+ tristate "LED Heartbeat Trigger"
+ help
+ This allows LEDs to be controlled by a CPU load average.
+ The flash frequency is a hyperbolic function of the 1-minute
+ load average.
+ If unsure, say Y.
+
+config LEDS_TRIGGER_BACKLIGHT
+ tristate "LED backlight Trigger"
+ help
+ This allows LEDs to be controlled as a backlight device: they
+ turn off and on when the display is blanked and unblanked.
+
+ If unsure, say N.
+
+config LEDS_TRIGGER_CPU
+ bool "LED CPU Trigger"
+ depends on !PREEMPT_RT
+ help
+ This allows LEDs to be controlled by active CPUs. This shows
+ the active CPUs across an array of LEDs so you can see which
+ CPUs are active on the system at any given moment.
+
+ If unsure, say N.
+
+config LEDS_TRIGGER_ACTIVITY
+ tristate "LED activity Trigger"
+ help
+ This allows LEDs to be controlled by an immediate CPU usage.
+ The flash frequency and duty cycle varies from faint flashes to
+ intense brightness depending on the instant CPU load.
+ If unsure, say N.
+
+config LEDS_TRIGGER_GPIO
+ tristate "LED GPIO Trigger"
+ depends on GPIOLIB || COMPILE_TEST
+ help
+ This allows LEDs to be controlled by gpio events. It's good
+ when using gpios as switches and triggering the needed LEDs
+ from there. One use case is n810's keypad LEDs that could
+ be triggered by this trigger when user slides up to show
+ keypad.
+
+ If unsure, say N.
+
+config LEDS_TRIGGER_DEFAULT_ON
+ tristate "LED Default ON Trigger"
+ help
+ This allows LEDs to be initialised in the ON state.
+ If unsure, say Y.
+
+comment "iptables trigger is under Netfilter config (LED target)"
+ depends on LEDS_TRIGGERS
+
+config LEDS_TRIGGER_TRANSIENT
+ tristate "LED Transient Trigger"
+ help
+ This allows one time activation of a transient state on
+ GPIO/PWM based hardware.
+ If unsure, say Y.
+
+config LEDS_TRIGGER_CAMERA
+ tristate "LED Camera Flash/Torch Trigger"
+ help
+ This allows LEDs to be controlled as a camera flash/torch device.
+ This enables direct flash/torch on/off by the driver, kernel space.
+ If unsure, say Y.
+
+config LEDS_TRIGGER_PANIC
+ bool "LED Panic Trigger"
+ help
+ This allows LEDs to be configured to blink on a kernel panic.
+ Enabling this option will allow to mark certain LEDs as panic indicators,
+ allowing to blink them on a kernel panic, even if they are set to
+ a different trigger.
+ If unsure, say Y.
+
+config LEDS_TRIGGER_NETDEV
+ tristate "LED Netdev Trigger"
+ depends on NET
+ help
+ This allows LEDs to be controlled by network device activity.
+ If unsure, say Y.
+
+config LEDS_TRIGGER_PATTERN
+ tristate "LED Pattern Trigger"
+ help
+ This allows LEDs to be controlled by a software or hardware pattern
+ which is a series of tuples, of brightness and duration (ms).
+ If unsure, say N
+
+config LEDS_TRIGGER_AUDIO
+ tristate "Audio Mute LED Trigger"
+ help
+ This allows LEDs to be controlled by audio drivers for following
+ the audio mute and mic-mute changes.
+ If unsure, say N
+
+config LEDS_TRIGGER_TTY
+ tristate "LED Trigger for TTY devices"
+ depends on TTY
+ help
+ This allows LEDs to be controlled by activity on ttys which includes
+ serial devices like /dev/ttyS0.
+
+ When build as a module this driver will be called ledtrig-tty.
+
+endif # LEDS_TRIGGERS
diff --git a/drivers/leds/trigger/Makefile b/drivers/leds/trigger/Makefile
new file mode 100644
index 000000000..25c4db97c
--- /dev/null
+++ b/drivers/leds/trigger/Makefile
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_LEDS_TRIGGER_TIMER) += ledtrig-timer.o
+obj-$(CONFIG_LEDS_TRIGGER_ONESHOT) += ledtrig-oneshot.o
+obj-$(CONFIG_LEDS_TRIGGER_DISK) += ledtrig-disk.o
+obj-$(CONFIG_LEDS_TRIGGER_MTD) += ledtrig-mtd.o
+obj-$(CONFIG_LEDS_TRIGGER_HEARTBEAT) += ledtrig-heartbeat.o
+obj-$(CONFIG_LEDS_TRIGGER_BACKLIGHT) += ledtrig-backlight.o
+obj-$(CONFIG_LEDS_TRIGGER_GPIO) += ledtrig-gpio.o
+obj-$(CONFIG_LEDS_TRIGGER_CPU) += ledtrig-cpu.o
+obj-$(CONFIG_LEDS_TRIGGER_ACTIVITY) += ledtrig-activity.o
+obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON) += ledtrig-default-on.o
+obj-$(CONFIG_LEDS_TRIGGER_TRANSIENT) += ledtrig-transient.o
+obj-$(CONFIG_LEDS_TRIGGER_CAMERA) += ledtrig-camera.o
+obj-$(CONFIG_LEDS_TRIGGER_PANIC) += ledtrig-panic.o
+obj-$(CONFIG_LEDS_TRIGGER_NETDEV) += ledtrig-netdev.o
+obj-$(CONFIG_LEDS_TRIGGER_PATTERN) += ledtrig-pattern.o
+obj-$(CONFIG_LEDS_TRIGGER_AUDIO) += ledtrig-audio.o
+obj-$(CONFIG_LEDS_TRIGGER_TTY) += ledtrig-tty.o
diff --git a/drivers/leds/trigger/ledtrig-activity.c b/drivers/leds/trigger/ledtrig-activity.c
new file mode 100644
index 000000000..30bc9df03
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-activity.c
@@ -0,0 +1,270 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Activity LED trigger
+ *
+ * Copyright (C) 2017 Willy Tarreau <w@1wt.eu>
+ * Partially based on Atsushi Nemoto's ledtrig-heartbeat.c.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/panic_notifier.h>
+#include <linux/reboot.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include "../leds.h"
+
+static int panic_detected;
+
+struct activity_data {
+ struct timer_list timer;
+ struct led_classdev *led_cdev;
+ u64 last_used;
+ u64 last_boot;
+ int time_left;
+ int state;
+ int invert;
+};
+
+static void led_activity_function(struct timer_list *t)
+{
+ struct activity_data *activity_data = from_timer(activity_data, t,
+ timer);
+ struct led_classdev *led_cdev = activity_data->led_cdev;
+ unsigned int target;
+ unsigned int usage;
+ int delay;
+ u64 curr_used;
+ u64 curr_boot;
+ s32 diff_used;
+ s32 diff_boot;
+ int cpus;
+ int i;
+
+ if (test_and_clear_bit(LED_BLINK_BRIGHTNESS_CHANGE, &led_cdev->work_flags))
+ led_cdev->blink_brightness = led_cdev->new_blink_brightness;
+
+ if (unlikely(panic_detected)) {
+ /* full brightness in case of panic */
+ led_set_brightness_nosleep(led_cdev, led_cdev->blink_brightness);
+ return;
+ }
+
+ cpus = 0;
+ curr_used = 0;
+
+ for_each_possible_cpu(i) {
+ struct kernel_cpustat kcpustat;
+
+ kcpustat_cpu_fetch(&kcpustat, i);
+
+ curr_used += kcpustat.cpustat[CPUTIME_USER]
+ + kcpustat.cpustat[CPUTIME_NICE]
+ + kcpustat.cpustat[CPUTIME_SYSTEM]
+ + kcpustat.cpustat[CPUTIME_SOFTIRQ]
+ + kcpustat.cpustat[CPUTIME_IRQ];
+ cpus++;
+ }
+
+ /* We come here every 100ms in the worst case, so that's 100M ns of
+ * cumulated time. By dividing by 2^16, we get the time resolution
+ * down to 16us, ensuring we won't overflow 32-bit computations below
+ * even up to 3k CPUs, while keeping divides cheap on smaller systems.
+ */
+ curr_boot = ktime_get_boottime_ns() * cpus;
+ diff_boot = (curr_boot - activity_data->last_boot) >> 16;
+ diff_used = (curr_used - activity_data->last_used) >> 16;
+ activity_data->last_boot = curr_boot;
+ activity_data->last_used = curr_used;
+
+ if (diff_boot <= 0 || diff_used < 0)
+ usage = 0;
+ else if (diff_used >= diff_boot)
+ usage = 100;
+ else
+ usage = 100 * diff_used / diff_boot;
+
+ /*
+ * Now we know the total boot_time multiplied by the number of CPUs, and
+ * the total idle+wait time for all CPUs. We'll compare how they evolved
+ * since last call. The % of overall CPU usage is :
+ *
+ * 1 - delta_idle / delta_boot
+ *
+ * What we want is that when the CPU usage is zero, the LED must blink
+ * slowly with very faint flashes that are detectable but not disturbing
+ * (typically 10ms every second, or 10ms ON, 990ms OFF). Then we want
+ * blinking frequency to increase up to the point where the load is
+ * enough to saturate one core in multi-core systems or 50% in single
+ * core systems. At this point it should reach 10 Hz with a 10/90 duty
+ * cycle (10ms ON, 90ms OFF). After this point, the blinking frequency
+ * remains stable (10 Hz) and only the duty cycle increases to report
+ * the activity, up to the point where we have 90ms ON, 10ms OFF when
+ * all cores are saturated. It's important that the LED never stays in
+ * a steady state so that it's easy to distinguish an idle or saturated
+ * machine from a hung one.
+ *
+ * This gives us :
+ * - a target CPU usage of min(50%, 100%/#CPU) for a 10% duty cycle
+ * (10ms ON, 90ms OFF)
+ * - below target :
+ * ON_ms = 10
+ * OFF_ms = 90 + (1 - usage/target) * 900
+ * - above target :
+ * ON_ms = 10 + (usage-target)/(100%-target) * 80
+ * OFF_ms = 90 - (usage-target)/(100%-target) * 80
+ *
+ * In order to keep a good responsiveness, we cap the sleep time to
+ * 100 ms and keep track of the sleep time left. This allows us to
+ * quickly change it if needed.
+ */
+
+ activity_data->time_left -= 100;
+ if (activity_data->time_left <= 0) {
+ activity_data->time_left = 0;
+ activity_data->state = !activity_data->state;
+ led_set_brightness_nosleep(led_cdev,
+ (activity_data->state ^ activity_data->invert) ?
+ led_cdev->blink_brightness : LED_OFF);
+ }
+
+ target = (cpus > 1) ? (100 / cpus) : 50;
+
+ if (usage < target)
+ delay = activity_data->state ?
+ 10 : /* ON */
+ 990 - 900 * usage / target; /* OFF */
+ else
+ delay = activity_data->state ?
+ 10 + 80 * (usage - target) / (100 - target) : /* ON */
+ 90 - 80 * (usage - target) / (100 - target); /* OFF */
+
+
+ if (!activity_data->time_left || delay <= activity_data->time_left)
+ activity_data->time_left = delay;
+
+ delay = min_t(int, activity_data->time_left, 100);
+ mod_timer(&activity_data->timer, jiffies + msecs_to_jiffies(delay));
+}
+
+static ssize_t led_invert_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct activity_data *activity_data = led_trigger_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", activity_data->invert);
+}
+
+static ssize_t led_invert_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct activity_data *activity_data = led_trigger_get_drvdata(dev);
+ unsigned long state;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &state);
+ if (ret)
+ return ret;
+
+ activity_data->invert = !!state;
+
+ return size;
+}
+
+static DEVICE_ATTR(invert, 0644, led_invert_show, led_invert_store);
+
+static struct attribute *activity_led_attrs[] = {
+ &dev_attr_invert.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(activity_led);
+
+static int activity_activate(struct led_classdev *led_cdev)
+{
+ struct activity_data *activity_data;
+
+ activity_data = kzalloc(sizeof(*activity_data), GFP_KERNEL);
+ if (!activity_data)
+ return -ENOMEM;
+
+ led_set_trigger_data(led_cdev, activity_data);
+
+ activity_data->led_cdev = led_cdev;
+ timer_setup(&activity_data->timer, led_activity_function, 0);
+ if (!led_cdev->blink_brightness)
+ led_cdev->blink_brightness = led_cdev->max_brightness;
+ led_activity_function(&activity_data->timer);
+ set_bit(LED_BLINK_SW, &led_cdev->work_flags);
+
+ return 0;
+}
+
+static void activity_deactivate(struct led_classdev *led_cdev)
+{
+ struct activity_data *activity_data = led_get_trigger_data(led_cdev);
+
+ del_timer_sync(&activity_data->timer);
+ kfree(activity_data);
+ clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
+}
+
+static struct led_trigger activity_led_trigger = {
+ .name = "activity",
+ .activate = activity_activate,
+ .deactivate = activity_deactivate,
+ .groups = activity_led_groups,
+};
+
+static int activity_reboot_notifier(struct notifier_block *nb,
+ unsigned long code, void *unused)
+{
+ led_trigger_unregister(&activity_led_trigger);
+ return NOTIFY_DONE;
+}
+
+static int activity_panic_notifier(struct notifier_block *nb,
+ unsigned long code, void *unused)
+{
+ panic_detected = 1;
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block activity_reboot_nb = {
+ .notifier_call = activity_reboot_notifier,
+};
+
+static struct notifier_block activity_panic_nb = {
+ .notifier_call = activity_panic_notifier,
+};
+
+static int __init activity_init(void)
+{
+ int rc = led_trigger_register(&activity_led_trigger);
+
+ if (!rc) {
+ atomic_notifier_chain_register(&panic_notifier_list,
+ &activity_panic_nb);
+ register_reboot_notifier(&activity_reboot_nb);
+ }
+ return rc;
+}
+
+static void __exit activity_exit(void)
+{
+ unregister_reboot_notifier(&activity_reboot_nb);
+ atomic_notifier_chain_unregister(&panic_notifier_list,
+ &activity_panic_nb);
+ led_trigger_unregister(&activity_led_trigger);
+}
+
+module_init(activity_init);
+module_exit(activity_exit);
+
+MODULE_AUTHOR("Willy Tarreau <w@1wt.eu>");
+MODULE_DESCRIPTION("Activity LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-audio.c b/drivers/leds/trigger/ledtrig-audio.c
new file mode 100644
index 000000000..c6b437e63
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-audio.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Audio Mute LED trigger
+//
+
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include "../leds.h"
+
+static enum led_brightness audio_state[NUM_AUDIO_LEDS];
+
+static int ledtrig_audio_mute_activate(struct led_classdev *led_cdev)
+{
+ led_set_brightness_nosleep(led_cdev, audio_state[LED_AUDIO_MUTE]);
+ return 0;
+}
+
+static int ledtrig_audio_micmute_activate(struct led_classdev *led_cdev)
+{
+ led_set_brightness_nosleep(led_cdev, audio_state[LED_AUDIO_MICMUTE]);
+ return 0;
+}
+
+static struct led_trigger ledtrig_audio[NUM_AUDIO_LEDS] = {
+ [LED_AUDIO_MUTE] = {
+ .name = "audio-mute",
+ .activate = ledtrig_audio_mute_activate,
+ },
+ [LED_AUDIO_MICMUTE] = {
+ .name = "audio-micmute",
+ .activate = ledtrig_audio_micmute_activate,
+ },
+};
+
+enum led_brightness ledtrig_audio_get(enum led_audio type)
+{
+ return audio_state[type];
+}
+EXPORT_SYMBOL_GPL(ledtrig_audio_get);
+
+void ledtrig_audio_set(enum led_audio type, enum led_brightness state)
+{
+ audio_state[type] = state;
+ led_trigger_event(&ledtrig_audio[type], state);
+}
+EXPORT_SYMBOL_GPL(ledtrig_audio_set);
+
+static int __init ledtrig_audio_init(void)
+{
+ led_trigger_register(&ledtrig_audio[LED_AUDIO_MUTE]);
+ led_trigger_register(&ledtrig_audio[LED_AUDIO_MICMUTE]);
+ return 0;
+}
+module_init(ledtrig_audio_init);
+
+static void __exit ledtrig_audio_exit(void)
+{
+ led_trigger_unregister(&ledtrig_audio[LED_AUDIO_MUTE]);
+ led_trigger_unregister(&ledtrig_audio[LED_AUDIO_MICMUTE]);
+}
+module_exit(ledtrig_audio_exit);
+
+MODULE_DESCRIPTION("LED trigger for audio mute control");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-backlight.c b/drivers/leds/trigger/ledtrig-backlight.c
new file mode 100644
index 000000000..487577d22
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-backlight.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Backlight emulation LED trigger
+ *
+ * Copyright 2008 (C) Rodolfo Giometti <giometti@linux.it>
+ * Copyright 2008 (C) Eurotech S.p.A. <info@eurotech.it>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/fb.h>
+#include <linux/leds.h>
+#include "../leds.h"
+
+#define BLANK 1
+#define UNBLANK 0
+
+struct bl_trig_notifier {
+ struct led_classdev *led;
+ int brightness;
+ int old_status;
+ struct notifier_block notifier;
+ unsigned invert;
+};
+
+static int fb_notifier_callback(struct notifier_block *p,
+ unsigned long event, void *data)
+{
+ struct bl_trig_notifier *n = container_of(p,
+ struct bl_trig_notifier, notifier);
+ struct led_classdev *led = n->led;
+ struct fb_event *fb_event = data;
+ int *blank;
+ int new_status;
+
+ /* If we aren't interested in this event, skip it immediately ... */
+ if (event != FB_EVENT_BLANK)
+ return 0;
+
+ blank = fb_event->data;
+ new_status = *blank ? BLANK : UNBLANK;
+
+ if (new_status == n->old_status)
+ return 0;
+
+ if ((n->old_status == UNBLANK) ^ n->invert) {
+ n->brightness = led->brightness;
+ led_set_brightness_nosleep(led, LED_OFF);
+ } else {
+ led_set_brightness_nosleep(led, n->brightness);
+ }
+
+ n->old_status = new_status;
+
+ return 0;
+}
+
+static ssize_t bl_trig_invert_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct bl_trig_notifier *n = led_trigger_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", n->invert);
+}
+
+static ssize_t bl_trig_invert_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t num)
+{
+ struct led_classdev *led = led_trigger_get_led(dev);
+ struct bl_trig_notifier *n = led_trigger_get_drvdata(dev);
+ unsigned long invert;
+ int ret;
+
+ ret = kstrtoul(buf, 10, &invert);
+ if (ret < 0)
+ return ret;
+
+ if (invert > 1)
+ return -EINVAL;
+
+ n->invert = invert;
+
+ /* After inverting, we need to update the LED. */
+ if ((n->old_status == BLANK) ^ n->invert)
+ led_set_brightness_nosleep(led, LED_OFF);
+ else
+ led_set_brightness_nosleep(led, n->brightness);
+
+ return num;
+}
+static DEVICE_ATTR(inverted, 0644, bl_trig_invert_show, bl_trig_invert_store);
+
+static struct attribute *bl_trig_attrs[] = {
+ &dev_attr_inverted.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(bl_trig);
+
+static int bl_trig_activate(struct led_classdev *led)
+{
+ int ret;
+
+ struct bl_trig_notifier *n;
+
+ n = kzalloc(sizeof(struct bl_trig_notifier), GFP_KERNEL);
+ if (!n)
+ return -ENOMEM;
+ led_set_trigger_data(led, n);
+
+ n->led = led;
+ n->brightness = led->brightness;
+ n->old_status = UNBLANK;
+ n->notifier.notifier_call = fb_notifier_callback;
+
+ ret = fb_register_client(&n->notifier);
+ if (ret)
+ dev_err(led->dev, "unable to register backlight trigger\n");
+
+ return 0;
+}
+
+static void bl_trig_deactivate(struct led_classdev *led)
+{
+ struct bl_trig_notifier *n = led_get_trigger_data(led);
+
+ fb_unregister_client(&n->notifier);
+ kfree(n);
+}
+
+static struct led_trigger bl_led_trigger = {
+ .name = "backlight",
+ .activate = bl_trig_activate,
+ .deactivate = bl_trig_deactivate,
+ .groups = bl_trig_groups,
+};
+module_led_trigger(bl_led_trigger);
+
+MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
+MODULE_DESCRIPTION("Backlight emulation LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-camera.c b/drivers/leds/trigger/ledtrig-camera.c
new file mode 100644
index 000000000..ab1c41087
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-camera.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Camera Flash and Torch On/Off Trigger
+ *
+ * based on ledtrig-ide-disk.c
+ *
+ * Copyright 2013 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+
+DEFINE_LED_TRIGGER(ledtrig_flash);
+DEFINE_LED_TRIGGER(ledtrig_torch);
+
+void ledtrig_flash_ctrl(bool on)
+{
+ enum led_brightness brt = on ? LED_FULL : LED_OFF;
+
+ led_trigger_event(ledtrig_flash, brt);
+}
+EXPORT_SYMBOL_GPL(ledtrig_flash_ctrl);
+
+void ledtrig_torch_ctrl(bool on)
+{
+ enum led_brightness brt = on ? LED_FULL : LED_OFF;
+
+ led_trigger_event(ledtrig_torch, brt);
+}
+EXPORT_SYMBOL_GPL(ledtrig_torch_ctrl);
+
+static int __init ledtrig_camera_init(void)
+{
+ led_trigger_register_simple("flash", &ledtrig_flash);
+ led_trigger_register_simple("torch", &ledtrig_torch);
+ return 0;
+}
+module_init(ledtrig_camera_init);
+
+static void __exit ledtrig_camera_exit(void)
+{
+ led_trigger_unregister_simple(ledtrig_torch);
+ led_trigger_unregister_simple(ledtrig_flash);
+}
+module_exit(ledtrig_camera_exit);
+
+MODULE_DESCRIPTION("LED Trigger for Camera Flash/Torch Control");
+MODULE_AUTHOR("Milo Kim");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-cpu.c b/drivers/leds/trigger/ledtrig-cpu.c
new file mode 100644
index 000000000..05848a2fe
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-cpu.c
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ledtrig-cpu.c - LED trigger based on CPU activity
+ *
+ * This LED trigger will be registered for first 8 CPUs and named
+ * as cpu0..cpu7. There's additional trigger called cpu that
+ * is on when any CPU is active.
+ *
+ * If you want support for arbitrary number of CPUs, make it one trigger,
+ * with additional sysfs file selecting which CPU to watch.
+ *
+ * It can be bound to any LED just like other triggers using either a
+ * board file or via sysfs interface.
+ *
+ * An API named ledtrig_cpu is exported for any user, who want to add CPU
+ * activity indication in their code.
+ *
+ * Copyright 2011 Linus Walleij <linus.walleij@linaro.org>
+ * Copyright 2011 - 2012 Bryan Wu <bryan.wu@canonical.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/percpu.h>
+#include <linux/syscore_ops.h>
+#include <linux/rwsem.h>
+#include <linux/cpu.h>
+#include "../leds.h"
+
+#define MAX_NAME_LEN 8
+
+struct led_trigger_cpu {
+ bool is_active;
+ char name[MAX_NAME_LEN];
+ struct led_trigger *_trig;
+};
+
+static DEFINE_PER_CPU(struct led_trigger_cpu, cpu_trig);
+
+static struct led_trigger *trig_cpu_all;
+static atomic_t num_active_cpus = ATOMIC_INIT(0);
+
+/**
+ * ledtrig_cpu - emit a CPU event as a trigger
+ * @ledevt: CPU event to be emitted
+ *
+ * Emit a CPU event on a CPU core, which will trigger a
+ * bound LED to turn on or turn off.
+ */
+void ledtrig_cpu(enum cpu_led_event ledevt)
+{
+ struct led_trigger_cpu *trig = this_cpu_ptr(&cpu_trig);
+ bool is_active = trig->is_active;
+
+ /* Locate the correct CPU LED */
+ switch (ledevt) {
+ case CPU_LED_IDLE_END:
+ case CPU_LED_START:
+ /* Will turn the LED on, max brightness */
+ is_active = true;
+ break;
+
+ case CPU_LED_IDLE_START:
+ case CPU_LED_STOP:
+ case CPU_LED_HALTED:
+ /* Will turn the LED off */
+ is_active = false;
+ break;
+
+ default:
+ /* Will leave the LED as it is */
+ break;
+ }
+
+ if (is_active != trig->is_active) {
+ unsigned int active_cpus;
+ unsigned int total_cpus;
+
+ /* Update trigger state */
+ trig->is_active = is_active;
+ atomic_add(is_active ? 1 : -1, &num_active_cpus);
+ active_cpus = atomic_read(&num_active_cpus);
+ total_cpus = num_present_cpus();
+
+ led_trigger_event(trig->_trig,
+ is_active ? LED_FULL : LED_OFF);
+
+
+ led_trigger_event(trig_cpu_all,
+ DIV_ROUND_UP(LED_FULL * active_cpus, total_cpus));
+
+ }
+}
+EXPORT_SYMBOL(ledtrig_cpu);
+
+static int ledtrig_cpu_syscore_suspend(void)
+{
+ ledtrig_cpu(CPU_LED_STOP);
+ return 0;
+}
+
+static void ledtrig_cpu_syscore_resume(void)
+{
+ ledtrig_cpu(CPU_LED_START);
+}
+
+static void ledtrig_cpu_syscore_shutdown(void)
+{
+ ledtrig_cpu(CPU_LED_HALTED);
+}
+
+static struct syscore_ops ledtrig_cpu_syscore_ops = {
+ .shutdown = ledtrig_cpu_syscore_shutdown,
+ .suspend = ledtrig_cpu_syscore_suspend,
+ .resume = ledtrig_cpu_syscore_resume,
+};
+
+static int ledtrig_online_cpu(unsigned int cpu)
+{
+ ledtrig_cpu(CPU_LED_START);
+ return 0;
+}
+
+static int ledtrig_prepare_down_cpu(unsigned int cpu)
+{
+ ledtrig_cpu(CPU_LED_STOP);
+ return 0;
+}
+
+static int __init ledtrig_cpu_init(void)
+{
+ unsigned int cpu;
+ int ret;
+
+ /* Supports up to 9999 cpu cores */
+ BUILD_BUG_ON(CONFIG_NR_CPUS > 9999);
+
+ /*
+ * Registering a trigger for all CPUs.
+ */
+ led_trigger_register_simple("cpu", &trig_cpu_all);
+
+ /*
+ * Registering CPU led trigger for each CPU core here
+ * ignores CPU hotplug, but after this CPU hotplug works
+ * fine with this trigger.
+ */
+ for_each_possible_cpu(cpu) {
+ struct led_trigger_cpu *trig = &per_cpu(cpu_trig, cpu);
+
+ if (cpu >= 8)
+ continue;
+
+ snprintf(trig->name, MAX_NAME_LEN, "cpu%u", cpu);
+
+ led_trigger_register_simple(trig->name, &trig->_trig);
+ }
+
+ register_syscore_ops(&ledtrig_cpu_syscore_ops);
+
+ ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "leds/trigger:starting",
+ ledtrig_online_cpu, ledtrig_prepare_down_cpu);
+ if (ret < 0)
+ pr_err("CPU hotplug notifier for ledtrig-cpu could not be registered: %d\n",
+ ret);
+
+ pr_info("ledtrig-cpu: registered to indicate activity on CPUs\n");
+
+ return 0;
+}
+device_initcall(ledtrig_cpu_init);
diff --git a/drivers/leds/trigger/ledtrig-default-on.c b/drivers/leds/trigger/ledtrig-default-on.c
new file mode 100644
index 000000000..8207f85ec
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-default-on.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Kernel Default ON Trigger
+ *
+ * Copyright 2008 Nick Forbes <nick.forbes@incepta.com>
+ *
+ * Based on Richard Purdie's ledtrig-timer.c.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include "../leds.h"
+
+static int defon_trig_activate(struct led_classdev *led_cdev)
+{
+ led_set_brightness_nosleep(led_cdev, led_cdev->max_brightness);
+ return 0;
+}
+
+static struct led_trigger defon_led_trigger = {
+ .name = "default-on",
+ .activate = defon_trig_activate,
+};
+module_led_trigger(defon_led_trigger);
+
+MODULE_AUTHOR("Nick Forbes <nick.forbes@incepta.com>");
+MODULE_DESCRIPTION("Default-ON LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-disk.c b/drivers/leds/trigger/ledtrig-disk.c
new file mode 100644
index 000000000..074191078
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-disk.c
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Disk Activity Trigger
+ *
+ * Copyright 2006 Openedhand Ltd.
+ *
+ * Author: Richard Purdie <rpurdie@openedhand.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+
+#define BLINK_DELAY 30
+
+DEFINE_LED_TRIGGER(ledtrig_disk);
+DEFINE_LED_TRIGGER(ledtrig_disk_read);
+DEFINE_LED_TRIGGER(ledtrig_disk_write);
+DEFINE_LED_TRIGGER(ledtrig_ide);
+
+void ledtrig_disk_activity(bool write)
+{
+ unsigned long blink_delay = BLINK_DELAY;
+
+ led_trigger_blink_oneshot(ledtrig_disk,
+ &blink_delay, &blink_delay, 0);
+ led_trigger_blink_oneshot(ledtrig_ide,
+ &blink_delay, &blink_delay, 0);
+ if (write)
+ led_trigger_blink_oneshot(ledtrig_disk_write,
+ &blink_delay, &blink_delay, 0);
+ else
+ led_trigger_blink_oneshot(ledtrig_disk_read,
+ &blink_delay, &blink_delay, 0);
+}
+EXPORT_SYMBOL(ledtrig_disk_activity);
+
+static int __init ledtrig_disk_init(void)
+{
+ led_trigger_register_simple("disk-activity", &ledtrig_disk);
+ led_trigger_register_simple("disk-read", &ledtrig_disk_read);
+ led_trigger_register_simple("disk-write", &ledtrig_disk_write);
+ led_trigger_register_simple("ide-disk", &ledtrig_ide);
+
+ return 0;
+}
+device_initcall(ledtrig_disk_init);
diff --git a/drivers/leds/trigger/ledtrig-gpio.c b/drivers/leds/trigger/ledtrig-gpio.c
new file mode 100644
index 000000000..0120faa3d
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-gpio.c
@@ -0,0 +1,202 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ledtrig-gio.c - LED Trigger Based on GPIO events
+ *
+ * Copyright 2009 Felipe Balbi <me@felipebalbi.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+#include "../leds.h"
+
+struct gpio_trig_data {
+ struct led_classdev *led;
+
+ unsigned desired_brightness; /* desired brightness when led is on */
+ unsigned inverted; /* true when gpio is inverted */
+ unsigned gpio; /* gpio that triggers the leds */
+};
+
+static irqreturn_t gpio_trig_irq(int irq, void *_led)
+{
+ struct led_classdev *led = _led;
+ struct gpio_trig_data *gpio_data = led_get_trigger_data(led);
+ int tmp;
+
+ tmp = gpio_get_value_cansleep(gpio_data->gpio);
+ if (gpio_data->inverted)
+ tmp = !tmp;
+
+ if (tmp) {
+ if (gpio_data->desired_brightness)
+ led_set_brightness_nosleep(gpio_data->led,
+ gpio_data->desired_brightness);
+ else
+ led_set_brightness_nosleep(gpio_data->led, LED_FULL);
+ } else {
+ led_set_brightness_nosleep(gpio_data->led, LED_OFF);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static ssize_t gpio_trig_brightness_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", gpio_data->desired_brightness);
+}
+
+static ssize_t gpio_trig_brightness_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t n)
+{
+ struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
+ unsigned desired_brightness;
+ int ret;
+
+ ret = sscanf(buf, "%u", &desired_brightness);
+ if (ret < 1 || desired_brightness > 255) {
+ dev_err(dev, "invalid value\n");
+ return -EINVAL;
+ }
+
+ gpio_data->desired_brightness = desired_brightness;
+
+ return n;
+}
+static DEVICE_ATTR(desired_brightness, 0644, gpio_trig_brightness_show,
+ gpio_trig_brightness_store);
+
+static ssize_t gpio_trig_inverted_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", gpio_data->inverted);
+}
+
+static ssize_t gpio_trig_inverted_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t n)
+{
+ struct led_classdev *led = led_trigger_get_led(dev);
+ struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
+ unsigned long inverted;
+ int ret;
+
+ ret = kstrtoul(buf, 10, &inverted);
+ if (ret < 0)
+ return ret;
+
+ if (inverted > 1)
+ return -EINVAL;
+
+ gpio_data->inverted = inverted;
+
+ /* After inverting, we need to update the LED. */
+ if (gpio_is_valid(gpio_data->gpio))
+ gpio_trig_irq(0, led);
+
+ return n;
+}
+static DEVICE_ATTR(inverted, 0644, gpio_trig_inverted_show,
+ gpio_trig_inverted_store);
+
+static ssize_t gpio_trig_gpio_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", gpio_data->gpio);
+}
+
+static ssize_t gpio_trig_gpio_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t n)
+{
+ struct led_classdev *led = led_trigger_get_led(dev);
+ struct gpio_trig_data *gpio_data = led_trigger_get_drvdata(dev);
+ unsigned gpio;
+ int ret;
+
+ ret = sscanf(buf, "%u", &gpio);
+ if (ret < 1) {
+ dev_err(dev, "couldn't read gpio number\n");
+ return -EINVAL;
+ }
+
+ if (gpio_data->gpio == gpio)
+ return n;
+
+ if (!gpio_is_valid(gpio)) {
+ if (gpio_is_valid(gpio_data->gpio))
+ free_irq(gpio_to_irq(gpio_data->gpio), led);
+ gpio_data->gpio = gpio;
+ return n;
+ }
+
+ ret = request_threaded_irq(gpio_to_irq(gpio), NULL, gpio_trig_irq,
+ IRQF_ONESHOT | IRQF_SHARED | IRQF_TRIGGER_RISING
+ | IRQF_TRIGGER_FALLING, "ledtrig-gpio", led);
+ if (ret) {
+ dev_err(dev, "request_irq failed with error %d\n", ret);
+ } else {
+ if (gpio_is_valid(gpio_data->gpio))
+ free_irq(gpio_to_irq(gpio_data->gpio), led);
+ gpio_data->gpio = gpio;
+ /* After changing the GPIO, we need to update the LED. */
+ gpio_trig_irq(0, led);
+ }
+
+ return ret ? ret : n;
+}
+static DEVICE_ATTR(gpio, 0644, gpio_trig_gpio_show, gpio_trig_gpio_store);
+
+static struct attribute *gpio_trig_attrs[] = {
+ &dev_attr_desired_brightness.attr,
+ &dev_attr_inverted.attr,
+ &dev_attr_gpio.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(gpio_trig);
+
+static int gpio_trig_activate(struct led_classdev *led)
+{
+ struct gpio_trig_data *gpio_data;
+
+ gpio_data = kzalloc(sizeof(*gpio_data), GFP_KERNEL);
+ if (!gpio_data)
+ return -ENOMEM;
+
+ gpio_data->led = led;
+ gpio_data->gpio = -ENOENT;
+
+ led_set_trigger_data(led, gpio_data);
+
+ return 0;
+}
+
+static void gpio_trig_deactivate(struct led_classdev *led)
+{
+ struct gpio_trig_data *gpio_data = led_get_trigger_data(led);
+
+ if (gpio_is_valid(gpio_data->gpio))
+ free_irq(gpio_to_irq(gpio_data->gpio), led);
+ kfree(gpio_data);
+}
+
+static struct led_trigger gpio_led_trigger = {
+ .name = "gpio",
+ .activate = gpio_trig_activate,
+ .deactivate = gpio_trig_deactivate,
+ .groups = gpio_trig_groups,
+};
+module_led_trigger(gpio_led_trigger);
+
+MODULE_AUTHOR("Felipe Balbi <me@felipebalbi.com>");
+MODULE_DESCRIPTION("GPIO LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-heartbeat.c b/drivers/leds/trigger/ledtrig-heartbeat.c
new file mode 100644
index 000000000..7fe0a0557
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-heartbeat.c
@@ -0,0 +1,213 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Heartbeat Trigger
+ *
+ * Copyright (C) 2006 Atsushi Nemoto <anemo@mba.ocn.ne.jp>
+ *
+ * Based on Richard Purdie's ledtrig-timer.c and some arch's
+ * CONFIG_HEARTBEAT code.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/panic_notifier.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/sched.h>
+#include <linux/sched/loadavg.h>
+#include <linux/leds.h>
+#include <linux/reboot.h>
+#include "../leds.h"
+
+static int panic_heartbeats;
+
+struct heartbeat_trig_data {
+ struct led_classdev *led_cdev;
+ unsigned int phase;
+ unsigned int period;
+ struct timer_list timer;
+ unsigned int invert;
+};
+
+static void led_heartbeat_function(struct timer_list *t)
+{
+ struct heartbeat_trig_data *heartbeat_data =
+ from_timer(heartbeat_data, t, timer);
+ struct led_classdev *led_cdev;
+ unsigned long brightness = LED_OFF;
+ unsigned long delay = 0;
+
+ led_cdev = heartbeat_data->led_cdev;
+
+ if (unlikely(panic_heartbeats)) {
+ led_set_brightness_nosleep(led_cdev, LED_OFF);
+ return;
+ }
+
+ if (test_and_clear_bit(LED_BLINK_BRIGHTNESS_CHANGE, &led_cdev->work_flags))
+ led_cdev->blink_brightness = led_cdev->new_blink_brightness;
+
+ /* acts like an actual heart beat -- ie thump-thump-pause... */
+ switch (heartbeat_data->phase) {
+ case 0:
+ /*
+ * The hyperbolic function below modifies the
+ * heartbeat period length in dependency of the
+ * current (1min) load. It goes through the points
+ * f(0)=1260, f(1)=860, f(5)=510, f(inf)->300.
+ */
+ heartbeat_data->period = 300 +
+ (6720 << FSHIFT) / (5 * avenrun[0] + (7 << FSHIFT));
+ heartbeat_data->period =
+ msecs_to_jiffies(heartbeat_data->period);
+ delay = msecs_to_jiffies(70);
+ heartbeat_data->phase++;
+ if (!heartbeat_data->invert)
+ brightness = led_cdev->blink_brightness;
+ break;
+ case 1:
+ delay = heartbeat_data->period / 4 - msecs_to_jiffies(70);
+ heartbeat_data->phase++;
+ if (heartbeat_data->invert)
+ brightness = led_cdev->blink_brightness;
+ break;
+ case 2:
+ delay = msecs_to_jiffies(70);
+ heartbeat_data->phase++;
+ if (!heartbeat_data->invert)
+ brightness = led_cdev->blink_brightness;
+ break;
+ default:
+ delay = heartbeat_data->period - heartbeat_data->period / 4 -
+ msecs_to_jiffies(70);
+ heartbeat_data->phase = 0;
+ if (heartbeat_data->invert)
+ brightness = led_cdev->blink_brightness;
+ break;
+ }
+
+ led_set_brightness_nosleep(led_cdev, brightness);
+ mod_timer(&heartbeat_data->timer, jiffies + delay);
+}
+
+static ssize_t led_invert_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct heartbeat_trig_data *heartbeat_data =
+ led_trigger_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", heartbeat_data->invert);
+}
+
+static ssize_t led_invert_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct heartbeat_trig_data *heartbeat_data =
+ led_trigger_get_drvdata(dev);
+ unsigned long state;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &state);
+ if (ret)
+ return ret;
+
+ heartbeat_data->invert = !!state;
+
+ return size;
+}
+
+static DEVICE_ATTR(invert, 0644, led_invert_show, led_invert_store);
+
+static struct attribute *heartbeat_trig_attrs[] = {
+ &dev_attr_invert.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(heartbeat_trig);
+
+static int heartbeat_trig_activate(struct led_classdev *led_cdev)
+{
+ struct heartbeat_trig_data *heartbeat_data;
+
+ heartbeat_data = kzalloc(sizeof(*heartbeat_data), GFP_KERNEL);
+ if (!heartbeat_data)
+ return -ENOMEM;
+
+ led_set_trigger_data(led_cdev, heartbeat_data);
+ heartbeat_data->led_cdev = led_cdev;
+
+ timer_setup(&heartbeat_data->timer, led_heartbeat_function, 0);
+ heartbeat_data->phase = 0;
+ if (!led_cdev->blink_brightness)
+ led_cdev->blink_brightness = led_cdev->max_brightness;
+ led_heartbeat_function(&heartbeat_data->timer);
+ set_bit(LED_BLINK_SW, &led_cdev->work_flags);
+
+ return 0;
+}
+
+static void heartbeat_trig_deactivate(struct led_classdev *led_cdev)
+{
+ struct heartbeat_trig_data *heartbeat_data =
+ led_get_trigger_data(led_cdev);
+
+ del_timer_sync(&heartbeat_data->timer);
+ kfree(heartbeat_data);
+ clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
+}
+
+static struct led_trigger heartbeat_led_trigger = {
+ .name = "heartbeat",
+ .activate = heartbeat_trig_activate,
+ .deactivate = heartbeat_trig_deactivate,
+ .groups = heartbeat_trig_groups,
+};
+
+static int heartbeat_reboot_notifier(struct notifier_block *nb,
+ unsigned long code, void *unused)
+{
+ led_trigger_unregister(&heartbeat_led_trigger);
+ return NOTIFY_DONE;
+}
+
+static int heartbeat_panic_notifier(struct notifier_block *nb,
+ unsigned long code, void *unused)
+{
+ panic_heartbeats = 1;
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block heartbeat_reboot_nb = {
+ .notifier_call = heartbeat_reboot_notifier,
+};
+
+static struct notifier_block heartbeat_panic_nb = {
+ .notifier_call = heartbeat_panic_notifier,
+};
+
+static int __init heartbeat_trig_init(void)
+{
+ int rc = led_trigger_register(&heartbeat_led_trigger);
+
+ if (!rc) {
+ atomic_notifier_chain_register(&panic_notifier_list,
+ &heartbeat_panic_nb);
+ register_reboot_notifier(&heartbeat_reboot_nb);
+ }
+ return rc;
+}
+
+static void __exit heartbeat_trig_exit(void)
+{
+ unregister_reboot_notifier(&heartbeat_reboot_nb);
+ atomic_notifier_chain_unregister(&panic_notifier_list,
+ &heartbeat_panic_nb);
+ led_trigger_unregister(&heartbeat_led_trigger);
+}
+
+module_init(heartbeat_trig_init);
+module_exit(heartbeat_trig_exit);
+
+MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
+MODULE_DESCRIPTION("Heartbeat LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-mtd.c b/drivers/leds/trigger/ledtrig-mtd.c
new file mode 100644
index 000000000..8fa763c22
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-mtd.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED MTD trigger
+ *
+ * Copyright 2016 Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
+ *
+ * Based on LED IDE-Disk Activity Trigger
+ *
+ * Copyright 2006 Openedhand Ltd.
+ *
+ * Author: Richard Purdie <rpurdie@openedhand.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+
+#define BLINK_DELAY 30
+
+DEFINE_LED_TRIGGER(ledtrig_mtd);
+DEFINE_LED_TRIGGER(ledtrig_nand);
+
+void ledtrig_mtd_activity(void)
+{
+ unsigned long blink_delay = BLINK_DELAY;
+
+ led_trigger_blink_oneshot(ledtrig_mtd,
+ &blink_delay, &blink_delay, 0);
+ led_trigger_blink_oneshot(ledtrig_nand,
+ &blink_delay, &blink_delay, 0);
+}
+EXPORT_SYMBOL(ledtrig_mtd_activity);
+
+static int __init ledtrig_mtd_init(void)
+{
+ led_trigger_register_simple("mtd", &ledtrig_mtd);
+ led_trigger_register_simple("nand-disk", &ledtrig_nand);
+
+ return 0;
+}
+device_initcall(ledtrig_mtd_init);
diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c
new file mode 100644
index 000000000..f4d670ec3
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -0,0 +1,465 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright 2017 Ben Whitten <ben.whitten@gmail.com>
+// Copyright 2007 Oliver Jowett <oliver@opencloud.com>
+//
+// LED Kernel Netdev Trigger
+//
+// Toggles the LED to reflect the link and traffic state of a named net device
+//
+// Derived from ledtrig-timer.c which is:
+// Copyright 2005-2006 Openedhand Ltd.
+// Author: Richard Purdie <rpurdie@openedhand.com>
+
+#include <linux/atomic.h>
+#include <linux/ctype.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include "../leds.h"
+
+/*
+ * Configurable sysfs attributes:
+ *
+ * device_name - network device name to monitor
+ * interval - duration of LED blink, in milliseconds
+ * link - LED's normal state reflects whether the link is up
+ * (has carrier) or not
+ * tx - LED blinks on transmitted data
+ * rx - LED blinks on receive data
+ *
+ */
+
+struct led_netdev_data {
+ spinlock_t lock;
+
+ struct delayed_work work;
+ struct notifier_block notifier;
+
+ struct led_classdev *led_cdev;
+ struct net_device *net_dev;
+
+ char device_name[IFNAMSIZ];
+ atomic_t interval;
+ unsigned int last_activity;
+
+ unsigned long mode;
+#define NETDEV_LED_LINK 0
+#define NETDEV_LED_TX 1
+#define NETDEV_LED_RX 2
+#define NETDEV_LED_MODE_LINKUP 3
+};
+
+enum netdev_led_attr {
+ NETDEV_ATTR_LINK,
+ NETDEV_ATTR_TX,
+ NETDEV_ATTR_RX
+};
+
+static void set_baseline_state(struct led_netdev_data *trigger_data)
+{
+ int current_brightness;
+ struct led_classdev *led_cdev = trigger_data->led_cdev;
+
+ current_brightness = led_cdev->brightness;
+ if (current_brightness)
+ led_cdev->blink_brightness = current_brightness;
+ if (!led_cdev->blink_brightness)
+ led_cdev->blink_brightness = led_cdev->max_brightness;
+
+ if (!test_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode))
+ led_set_brightness(led_cdev, LED_OFF);
+ else {
+ if (test_bit(NETDEV_LED_LINK, &trigger_data->mode))
+ led_set_brightness(led_cdev,
+ led_cdev->blink_brightness);
+ else
+ led_set_brightness(led_cdev, LED_OFF);
+
+ /* If we are looking for RX/TX start periodically
+ * checking stats
+ */
+ if (test_bit(NETDEV_LED_TX, &trigger_data->mode) ||
+ test_bit(NETDEV_LED_RX, &trigger_data->mode))
+ schedule_delayed_work(&trigger_data->work, 0);
+ }
+}
+
+static ssize_t device_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
+ ssize_t len;
+
+ spin_lock_bh(&trigger_data->lock);
+ len = sprintf(buf, "%s\n", trigger_data->device_name);
+ spin_unlock_bh(&trigger_data->lock);
+
+ return len;
+}
+
+static ssize_t device_name_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t size)
+{
+ struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
+
+ if (size >= IFNAMSIZ)
+ return -EINVAL;
+
+ cancel_delayed_work_sync(&trigger_data->work);
+
+ spin_lock_bh(&trigger_data->lock);
+
+ if (trigger_data->net_dev) {
+ dev_put(trigger_data->net_dev);
+ trigger_data->net_dev = NULL;
+ }
+
+ memcpy(trigger_data->device_name, buf, size);
+ trigger_data->device_name[size] = 0;
+ if (size > 0 && trigger_data->device_name[size - 1] == '\n')
+ trigger_data->device_name[size - 1] = 0;
+
+ if (trigger_data->device_name[0] != 0)
+ trigger_data->net_dev =
+ dev_get_by_name(&init_net, trigger_data->device_name);
+
+ clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
+ if (trigger_data->net_dev != NULL)
+ if (netif_carrier_ok(trigger_data->net_dev))
+ set_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
+
+ trigger_data->last_activity = 0;
+
+ set_baseline_state(trigger_data);
+ spin_unlock_bh(&trigger_data->lock);
+
+ return size;
+}
+
+static DEVICE_ATTR_RW(device_name);
+
+static ssize_t netdev_led_attr_show(struct device *dev, char *buf,
+ enum netdev_led_attr attr)
+{
+ struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
+ int bit;
+
+ switch (attr) {
+ case NETDEV_ATTR_LINK:
+ bit = NETDEV_LED_LINK;
+ break;
+ case NETDEV_ATTR_TX:
+ bit = NETDEV_LED_TX;
+ break;
+ case NETDEV_ATTR_RX:
+ bit = NETDEV_LED_RX;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return sprintf(buf, "%u\n", test_bit(bit, &trigger_data->mode));
+}
+
+static ssize_t netdev_led_attr_store(struct device *dev, const char *buf,
+ size_t size, enum netdev_led_attr attr)
+{
+ struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
+ unsigned long state;
+ int ret;
+ int bit;
+
+ ret = kstrtoul(buf, 0, &state);
+ if (ret)
+ return ret;
+
+ switch (attr) {
+ case NETDEV_ATTR_LINK:
+ bit = NETDEV_LED_LINK;
+ break;
+ case NETDEV_ATTR_TX:
+ bit = NETDEV_LED_TX;
+ break;
+ case NETDEV_ATTR_RX:
+ bit = NETDEV_LED_RX;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ cancel_delayed_work_sync(&trigger_data->work);
+
+ if (state)
+ set_bit(bit, &trigger_data->mode);
+ else
+ clear_bit(bit, &trigger_data->mode);
+
+ set_baseline_state(trigger_data);
+
+ return size;
+}
+
+static ssize_t link_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return netdev_led_attr_show(dev, buf, NETDEV_ATTR_LINK);
+}
+
+static ssize_t link_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_LINK);
+}
+
+static DEVICE_ATTR_RW(link);
+
+static ssize_t tx_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return netdev_led_attr_show(dev, buf, NETDEV_ATTR_TX);
+}
+
+static ssize_t tx_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_TX);
+}
+
+static DEVICE_ATTR_RW(tx);
+
+static ssize_t rx_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return netdev_led_attr_show(dev, buf, NETDEV_ATTR_RX);
+}
+
+static ssize_t rx_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_RX);
+}
+
+static DEVICE_ATTR_RW(rx);
+
+static ssize_t interval_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n",
+ jiffies_to_msecs(atomic_read(&trigger_data->interval)));
+}
+
+static ssize_t interval_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t size)
+{
+ struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
+ unsigned long value;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &value);
+ if (ret)
+ return ret;
+
+ /* impose some basic bounds on the timer interval */
+ if (value >= 5 && value <= 10000) {
+ cancel_delayed_work_sync(&trigger_data->work);
+
+ atomic_set(&trigger_data->interval, msecs_to_jiffies(value));
+ set_baseline_state(trigger_data); /* resets timer */
+ }
+
+ return size;
+}
+
+static DEVICE_ATTR_RW(interval);
+
+static struct attribute *netdev_trig_attrs[] = {
+ &dev_attr_device_name.attr,
+ &dev_attr_link.attr,
+ &dev_attr_rx.attr,
+ &dev_attr_tx.attr,
+ &dev_attr_interval.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(netdev_trig);
+
+static int netdev_trig_notify(struct notifier_block *nb,
+ unsigned long evt, void *dv)
+{
+ struct net_device *dev =
+ netdev_notifier_info_to_dev((struct netdev_notifier_info *)dv);
+ struct led_netdev_data *trigger_data =
+ container_of(nb, struct led_netdev_data, notifier);
+
+ if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE
+ && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER
+ && evt != NETDEV_CHANGENAME)
+ return NOTIFY_DONE;
+
+ if (!(dev == trigger_data->net_dev ||
+ (evt == NETDEV_CHANGENAME && !strcmp(dev->name, trigger_data->device_name)) ||
+ (evt == NETDEV_REGISTER && !strcmp(dev->name, trigger_data->device_name))))
+ return NOTIFY_DONE;
+
+ cancel_delayed_work_sync(&trigger_data->work);
+
+ spin_lock_bh(&trigger_data->lock);
+
+ clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
+ switch (evt) {
+ case NETDEV_CHANGENAME:
+ if (netif_carrier_ok(dev))
+ set_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
+ fallthrough;
+ case NETDEV_REGISTER:
+ if (trigger_data->net_dev)
+ dev_put(trigger_data->net_dev);
+ dev_hold(dev);
+ trigger_data->net_dev = dev;
+ break;
+ case NETDEV_UNREGISTER:
+ dev_put(trigger_data->net_dev);
+ trigger_data->net_dev = NULL;
+ break;
+ case NETDEV_UP:
+ case NETDEV_CHANGE:
+ if (netif_carrier_ok(dev))
+ set_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
+ break;
+ }
+
+ set_baseline_state(trigger_data);
+
+ spin_unlock_bh(&trigger_data->lock);
+
+ return NOTIFY_DONE;
+}
+
+/* here's the real work! */
+static void netdev_trig_work(struct work_struct *work)
+{
+ struct led_netdev_data *trigger_data =
+ container_of(work, struct led_netdev_data, work.work);
+ struct rtnl_link_stats64 *dev_stats;
+ unsigned int new_activity;
+ struct rtnl_link_stats64 temp;
+ unsigned long interval;
+ int invert;
+
+ /* If we dont have a device, insure we are off */
+ if (!trigger_data->net_dev) {
+ led_set_brightness(trigger_data->led_cdev, LED_OFF);
+ return;
+ }
+
+ /* If we are not looking for RX/TX then return */
+ if (!test_bit(NETDEV_LED_TX, &trigger_data->mode) &&
+ !test_bit(NETDEV_LED_RX, &trigger_data->mode))
+ return;
+
+ dev_stats = dev_get_stats(trigger_data->net_dev, &temp);
+ new_activity =
+ (test_bit(NETDEV_LED_TX, &trigger_data->mode) ?
+ dev_stats->tx_packets : 0) +
+ (test_bit(NETDEV_LED_RX, &trigger_data->mode) ?
+ dev_stats->rx_packets : 0);
+
+ if (trigger_data->last_activity != new_activity) {
+ led_stop_software_blink(trigger_data->led_cdev);
+
+ invert = test_bit(NETDEV_LED_LINK, &trigger_data->mode);
+ interval = jiffies_to_msecs(
+ atomic_read(&trigger_data->interval));
+ /* base state is ON (link present) */
+ led_blink_set_oneshot(trigger_data->led_cdev,
+ &interval,
+ &interval,
+ invert);
+ trigger_data->last_activity = new_activity;
+ }
+
+ schedule_delayed_work(&trigger_data->work,
+ (atomic_read(&trigger_data->interval)*2));
+}
+
+static int netdev_trig_activate(struct led_classdev *led_cdev)
+{
+ struct led_netdev_data *trigger_data;
+ int rc;
+
+ trigger_data = kzalloc(sizeof(struct led_netdev_data), GFP_KERNEL);
+ if (!trigger_data)
+ return -ENOMEM;
+
+ spin_lock_init(&trigger_data->lock);
+
+ trigger_data->notifier.notifier_call = netdev_trig_notify;
+ trigger_data->notifier.priority = 10;
+
+ INIT_DELAYED_WORK(&trigger_data->work, netdev_trig_work);
+
+ trigger_data->led_cdev = led_cdev;
+ trigger_data->net_dev = NULL;
+ trigger_data->device_name[0] = 0;
+
+ trigger_data->mode = 0;
+ atomic_set(&trigger_data->interval, msecs_to_jiffies(50));
+ trigger_data->last_activity = 0;
+
+ led_set_trigger_data(led_cdev, trigger_data);
+
+ rc = register_netdevice_notifier(&trigger_data->notifier);
+ if (rc)
+ kfree(trigger_data);
+
+ return rc;
+}
+
+static void netdev_trig_deactivate(struct led_classdev *led_cdev)
+{
+ struct led_netdev_data *trigger_data = led_get_trigger_data(led_cdev);
+
+ unregister_netdevice_notifier(&trigger_data->notifier);
+
+ cancel_delayed_work_sync(&trigger_data->work);
+
+ if (trigger_data->net_dev)
+ dev_put(trigger_data->net_dev);
+
+ kfree(trigger_data);
+}
+
+static struct led_trigger netdev_led_trigger = {
+ .name = "netdev",
+ .activate = netdev_trig_activate,
+ .deactivate = netdev_trig_deactivate,
+ .groups = netdev_trig_groups,
+};
+
+static int __init netdev_trig_init(void)
+{
+ return led_trigger_register(&netdev_led_trigger);
+}
+
+static void __exit netdev_trig_exit(void)
+{
+ led_trigger_unregister(&netdev_led_trigger);
+}
+
+module_init(netdev_trig_init);
+module_exit(netdev_trig_exit);
+
+MODULE_AUTHOR("Ben Whitten <ben.whitten@gmail.com>");
+MODULE_AUTHOR("Oliver Jowett <oliver@opencloud.com>");
+MODULE_DESCRIPTION("Netdev LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-oneshot.c b/drivers/leds/trigger/ledtrig-oneshot.c
new file mode 100644
index 000000000..bee3bd452
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-oneshot.c
@@ -0,0 +1,200 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * One-shot LED Trigger
+ *
+ * Copyright 2012, Fabio Baltieri <fabio.baltieri@gmail.com>
+ *
+ * Based on ledtrig-timer.c by Richard Purdie <rpurdie@openedhand.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+#include "../leds.h"
+
+#define DEFAULT_DELAY 100
+
+struct oneshot_trig_data {
+ unsigned int invert;
+};
+
+static ssize_t led_shot(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = led_trigger_get_led(dev);
+ struct oneshot_trig_data *oneshot_data = led_trigger_get_drvdata(dev);
+
+ led_blink_set_oneshot(led_cdev,
+ &led_cdev->blink_delay_on, &led_cdev->blink_delay_off,
+ oneshot_data->invert);
+
+ /* content is ignored */
+ return size;
+}
+static ssize_t led_invert_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct oneshot_trig_data *oneshot_data = led_trigger_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", oneshot_data->invert);
+}
+
+static ssize_t led_invert_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = led_trigger_get_led(dev);
+ struct oneshot_trig_data *oneshot_data = led_trigger_get_drvdata(dev);
+ unsigned long state;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &state);
+ if (ret)
+ return ret;
+
+ oneshot_data->invert = !!state;
+
+ if (oneshot_data->invert)
+ led_set_brightness_nosleep(led_cdev, LED_FULL);
+ else
+ led_set_brightness_nosleep(led_cdev, LED_OFF);
+
+ return size;
+}
+
+static ssize_t led_delay_on_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = led_trigger_get_led(dev);
+
+ return sprintf(buf, "%lu\n", led_cdev->blink_delay_on);
+}
+
+static ssize_t led_delay_on_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = led_trigger_get_led(dev);
+ unsigned long state;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &state);
+ if (ret)
+ return ret;
+
+ led_cdev->blink_delay_on = state;
+
+ return size;
+}
+
+static ssize_t led_delay_off_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = led_trigger_get_led(dev);
+
+ return sprintf(buf, "%lu\n", led_cdev->blink_delay_off);
+}
+
+static ssize_t led_delay_off_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = led_trigger_get_led(dev);
+ unsigned long state;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &state);
+ if (ret)
+ return ret;
+
+ led_cdev->blink_delay_off = state;
+
+ return size;
+}
+
+static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);
+static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
+static DEVICE_ATTR(invert, 0644, led_invert_show, led_invert_store);
+static DEVICE_ATTR(shot, 0200, NULL, led_shot);
+
+static struct attribute *oneshot_trig_attrs[] = {
+ &dev_attr_delay_on.attr,
+ &dev_attr_delay_off.attr,
+ &dev_attr_invert.attr,
+ &dev_attr_shot.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(oneshot_trig);
+
+static void pattern_init(struct led_classdev *led_cdev)
+{
+ u32 *pattern;
+ unsigned int size = 0;
+
+ pattern = led_get_default_pattern(led_cdev, &size);
+ if (!pattern)
+ goto out_default;
+
+ if (size != 2) {
+ dev_warn(led_cdev->dev,
+ "Expected 2 but got %u values for delays pattern\n",
+ size);
+ goto out_default;
+ }
+
+ led_cdev->blink_delay_on = pattern[0];
+ led_cdev->blink_delay_off = pattern[1];
+ kfree(pattern);
+
+ return;
+
+out_default:
+ kfree(pattern);
+ led_cdev->blink_delay_on = DEFAULT_DELAY;
+ led_cdev->blink_delay_off = DEFAULT_DELAY;
+}
+
+static int oneshot_trig_activate(struct led_classdev *led_cdev)
+{
+ struct oneshot_trig_data *oneshot_data;
+
+ oneshot_data = kzalloc(sizeof(*oneshot_data), GFP_KERNEL);
+ if (!oneshot_data)
+ return -ENOMEM;
+
+ led_set_trigger_data(led_cdev, oneshot_data);
+
+ if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) {
+ pattern_init(led_cdev);
+ /*
+ * Mark as initialized even on pattern_init() error because
+ * any consecutive call to it would produce the same error.
+ */
+ led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER;
+ }
+
+ return 0;
+}
+
+static void oneshot_trig_deactivate(struct led_classdev *led_cdev)
+{
+ struct oneshot_trig_data *oneshot_data = led_get_trigger_data(led_cdev);
+
+ kfree(oneshot_data);
+
+ /* Stop blinking */
+ led_set_brightness(led_cdev, LED_OFF);
+}
+
+static struct led_trigger oneshot_led_trigger = {
+ .name = "oneshot",
+ .activate = oneshot_trig_activate,
+ .deactivate = oneshot_trig_deactivate,
+ .groups = oneshot_trig_groups,
+};
+module_led_trigger(oneshot_led_trigger);
+
+MODULE_AUTHOR("Fabio Baltieri <fabio.baltieri@gmail.com>");
+MODULE_DESCRIPTION("One-shot LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-panic.c b/drivers/leds/trigger/ledtrig-panic.c
new file mode 100644
index 000000000..64abf2e91
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-panic.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Kernel Panic LED Trigger
+ *
+ * Copyright 2016 Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/notifier.h>
+#include <linux/panic_notifier.h>
+#include <linux/leds.h>
+#include "../leds.h"
+
+static struct led_trigger *trigger;
+
+/*
+ * This is called in a special context by the atomic panic
+ * notifier. This means the trigger can be changed without
+ * worrying about locking.
+ */
+static void led_trigger_set_panic(struct led_classdev *led_cdev)
+{
+ struct led_trigger *trig;
+
+ list_for_each_entry(trig, &trigger_list, next_trig) {
+ if (strcmp("panic", trig->name))
+ continue;
+ if (led_cdev->trigger)
+ list_del(&led_cdev->trig_list);
+ list_add_tail(&led_cdev->trig_list, &trig->led_cdevs);
+
+ /* Avoid the delayed blink path */
+ led_cdev->blink_delay_on = 0;
+ led_cdev->blink_delay_off = 0;
+
+ led_cdev->trigger = trig;
+ if (trig->activate)
+ trig->activate(led_cdev);
+ break;
+ }
+}
+
+static int led_trigger_panic_notifier(struct notifier_block *nb,
+ unsigned long code, void *unused)
+{
+ struct led_classdev *led_cdev;
+
+ list_for_each_entry(led_cdev, &leds_list, node)
+ if (led_cdev->flags & LED_PANIC_INDICATOR)
+ led_trigger_set_panic(led_cdev);
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block led_trigger_panic_nb = {
+ .notifier_call = led_trigger_panic_notifier,
+};
+
+static long led_panic_blink(int state)
+{
+ led_trigger_event(trigger, state ? LED_FULL : LED_OFF);
+ return 0;
+}
+
+static int __init ledtrig_panic_init(void)
+{
+ atomic_notifier_chain_register(&panic_notifier_list,
+ &led_trigger_panic_nb);
+
+ led_trigger_register_simple("panic", &trigger);
+ panic_blink = led_panic_blink;
+ return 0;
+}
+device_initcall(ledtrig_panic_init);
diff --git a/drivers/leds/trigger/ledtrig-pattern.c b/drivers/leds/trigger/ledtrig-pattern.c
new file mode 100644
index 000000000..43a265dc4
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-pattern.c
@@ -0,0 +1,463 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * LED pattern trigger
+ *
+ * Idea discussed with Pavel Machek. Raphael Teysseyre implemented
+ * the first version, Baolin Wang simplified and improved the approach.
+ */
+
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+
+#define MAX_PATTERNS 1024
+/*
+ * When doing gradual dimming, the led brightness will be updated
+ * every 50 milliseconds.
+ */
+#define UPDATE_INTERVAL 50
+
+struct pattern_trig_data {
+ struct led_classdev *led_cdev;
+ struct led_pattern patterns[MAX_PATTERNS];
+ struct led_pattern *curr;
+ struct led_pattern *next;
+ struct mutex lock;
+ u32 npatterns;
+ int repeat;
+ int last_repeat;
+ int delta_t;
+ bool is_indefinite;
+ bool is_hw_pattern;
+ struct timer_list timer;
+};
+
+static void pattern_trig_update_patterns(struct pattern_trig_data *data)
+{
+ data->curr = data->next;
+ if (!data->is_indefinite && data->curr == data->patterns)
+ data->repeat--;
+
+ if (data->next == data->patterns + data->npatterns - 1)
+ data->next = data->patterns;
+ else
+ data->next++;
+
+ data->delta_t = 0;
+}
+
+static int pattern_trig_compute_brightness(struct pattern_trig_data *data)
+{
+ int step_brightness;
+
+ /*
+ * If current tuple's duration is less than the dimming interval,
+ * we should treat it as a step change of brightness instead of
+ * doing gradual dimming.
+ */
+ if (data->delta_t == 0 || data->curr->delta_t < UPDATE_INTERVAL)
+ return data->curr->brightness;
+
+ step_brightness = abs(data->next->brightness - data->curr->brightness);
+ step_brightness = data->delta_t * step_brightness / data->curr->delta_t;
+
+ if (data->next->brightness > data->curr->brightness)
+ return data->curr->brightness + step_brightness;
+ else
+ return data->curr->brightness - step_brightness;
+}
+
+static void pattern_trig_timer_function(struct timer_list *t)
+{
+ struct pattern_trig_data *data = from_timer(data, t, timer);
+
+ for (;;) {
+ if (!data->is_indefinite && !data->repeat)
+ break;
+
+ if (data->curr->brightness == data->next->brightness) {
+ /* Step change of brightness */
+ led_set_brightness(data->led_cdev,
+ data->curr->brightness);
+ mod_timer(&data->timer,
+ jiffies + msecs_to_jiffies(data->curr->delta_t));
+ if (!data->next->delta_t) {
+ /* Skip the tuple with zero duration */
+ pattern_trig_update_patterns(data);
+ }
+ /* Select next tuple */
+ pattern_trig_update_patterns(data);
+ } else {
+ /* Gradual dimming */
+
+ /*
+ * If the accumulation time is larger than current
+ * tuple's duration, we should go next one and re-check
+ * if we repeated done.
+ */
+ if (data->delta_t > data->curr->delta_t) {
+ pattern_trig_update_patterns(data);
+ continue;
+ }
+
+ led_set_brightness(data->led_cdev,
+ pattern_trig_compute_brightness(data));
+ mod_timer(&data->timer,
+ jiffies + msecs_to_jiffies(UPDATE_INTERVAL));
+
+ /* Accumulate the gradual dimming time */
+ data->delta_t += UPDATE_INTERVAL;
+ }
+
+ break;
+ }
+}
+
+static int pattern_trig_start_pattern(struct led_classdev *led_cdev)
+{
+ struct pattern_trig_data *data = led_cdev->trigger_data;
+
+ if (!data->npatterns)
+ return 0;
+
+ if (data->is_hw_pattern) {
+ return led_cdev->pattern_set(led_cdev, data->patterns,
+ data->npatterns, data->repeat);
+ }
+
+ /* At least 2 tuples for software pattern. */
+ if (data->npatterns < 2)
+ return -EINVAL;
+
+ data->delta_t = 0;
+ data->curr = data->patterns;
+ data->next = data->patterns + 1;
+ data->timer.expires = jiffies;
+ add_timer(&data->timer);
+
+ return 0;
+}
+
+static ssize_t repeat_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct pattern_trig_data *data = led_cdev->trigger_data;
+ int repeat;
+
+ mutex_lock(&data->lock);
+
+ repeat = data->last_repeat;
+
+ mutex_unlock(&data->lock);
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", repeat);
+}
+
+static ssize_t repeat_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct pattern_trig_data *data = led_cdev->trigger_data;
+ int err, res;
+
+ err = kstrtos32(buf, 10, &res);
+ if (err)
+ return err;
+
+ /* Number 0 and negative numbers except -1 are invalid. */
+ if (res < -1 || res == 0)
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+
+ del_timer_sync(&data->timer);
+
+ if (data->is_hw_pattern)
+ led_cdev->pattern_clear(led_cdev);
+
+ data->last_repeat = data->repeat = res;
+ /* -1 means repeat indefinitely */
+ if (data->repeat == -1)
+ data->is_indefinite = true;
+ else
+ data->is_indefinite = false;
+
+ err = pattern_trig_start_pattern(led_cdev);
+
+ mutex_unlock(&data->lock);
+ return err < 0 ? err : count;
+}
+
+static DEVICE_ATTR_RW(repeat);
+
+static ssize_t pattern_trig_show_patterns(struct pattern_trig_data *data,
+ char *buf, bool hw_pattern)
+{
+ ssize_t count = 0;
+ int i;
+
+ mutex_lock(&data->lock);
+
+ if (!data->npatterns || (data->is_hw_pattern ^ hw_pattern))
+ goto out;
+
+ for (i = 0; i < data->npatterns; i++) {
+ count += scnprintf(buf + count, PAGE_SIZE - count,
+ "%d %u ",
+ data->patterns[i].brightness,
+ data->patterns[i].delta_t);
+ }
+
+ buf[count - 1] = '\n';
+
+out:
+ mutex_unlock(&data->lock);
+ return count;
+}
+
+static int pattern_trig_store_patterns_string(struct pattern_trig_data *data,
+ const char *buf, size_t count)
+{
+ int ccount, cr, offset = 0;
+
+ while (offset < count - 1 && data->npatterns < MAX_PATTERNS) {
+ cr = 0;
+ ccount = sscanf(buf + offset, "%u %u %n",
+ &data->patterns[data->npatterns].brightness,
+ &data->patterns[data->npatterns].delta_t, &cr);
+
+ if (ccount != 2 ||
+ data->patterns[data->npatterns].brightness > data->led_cdev->max_brightness) {
+ data->npatterns = 0;
+ return -EINVAL;
+ }
+
+ offset += cr;
+ data->npatterns++;
+ }
+
+ return 0;
+}
+
+static int pattern_trig_store_patterns_int(struct pattern_trig_data *data,
+ const u32 *buf, size_t count)
+{
+ unsigned int i;
+
+ for (i = 0; i < count; i += 2) {
+ data->patterns[data->npatterns].brightness = buf[i];
+ data->patterns[data->npatterns].delta_t = buf[i + 1];
+ data->npatterns++;
+ }
+
+ return 0;
+}
+
+static ssize_t pattern_trig_store_patterns(struct led_classdev *led_cdev,
+ const char *buf, const u32 *buf_int,
+ size_t count, bool hw_pattern)
+{
+ struct pattern_trig_data *data = led_cdev->trigger_data;
+ int err = 0;
+
+ mutex_lock(&data->lock);
+
+ del_timer_sync(&data->timer);
+
+ if (data->is_hw_pattern)
+ led_cdev->pattern_clear(led_cdev);
+
+ data->is_hw_pattern = hw_pattern;
+ data->npatterns = 0;
+
+ if (buf)
+ err = pattern_trig_store_patterns_string(data, buf, count);
+ else
+ err = pattern_trig_store_patterns_int(data, buf_int, count);
+ if (err)
+ goto out;
+
+ err = pattern_trig_start_pattern(led_cdev);
+ if (err)
+ data->npatterns = 0;
+
+out:
+ mutex_unlock(&data->lock);
+ return err < 0 ? err : count;
+}
+
+static ssize_t pattern_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct pattern_trig_data *data = led_cdev->trigger_data;
+
+ return pattern_trig_show_patterns(data, buf, false);
+}
+
+static ssize_t pattern_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+
+ return pattern_trig_store_patterns(led_cdev, buf, NULL, count, false);
+}
+
+static DEVICE_ATTR_RW(pattern);
+
+static ssize_t hw_pattern_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct pattern_trig_data *data = led_cdev->trigger_data;
+
+ return pattern_trig_show_patterns(data, buf, true);
+}
+
+static ssize_t hw_pattern_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+
+ return pattern_trig_store_patterns(led_cdev, buf, NULL, count, true);
+}
+
+static DEVICE_ATTR_RW(hw_pattern);
+
+static umode_t pattern_trig_attrs_mode(struct kobject *kobj,
+ struct attribute *attr, int index)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+
+ if (attr == &dev_attr_repeat.attr || attr == &dev_attr_pattern.attr)
+ return attr->mode;
+ else if (attr == &dev_attr_hw_pattern.attr && led_cdev->pattern_set)
+ return attr->mode;
+
+ return 0;
+}
+
+static struct attribute *pattern_trig_attrs[] = {
+ &dev_attr_pattern.attr,
+ &dev_attr_hw_pattern.attr,
+ &dev_attr_repeat.attr,
+ NULL
+};
+
+static const struct attribute_group pattern_trig_group = {
+ .attrs = pattern_trig_attrs,
+ .is_visible = pattern_trig_attrs_mode,
+};
+
+static const struct attribute_group *pattern_trig_groups[] = {
+ &pattern_trig_group,
+ NULL,
+};
+
+static void pattern_init(struct led_classdev *led_cdev)
+{
+ unsigned int size = 0;
+ u32 *pattern;
+ int err;
+
+ pattern = led_get_default_pattern(led_cdev, &size);
+ if (!pattern)
+ return;
+
+ if (size % 2) {
+ dev_warn(led_cdev->dev, "Expected pattern of tuples\n");
+ goto out;
+ }
+
+ err = pattern_trig_store_patterns(led_cdev, NULL, pattern, size, false);
+ if (err < 0)
+ dev_warn(led_cdev->dev,
+ "Pattern initialization failed with error %d\n", err);
+
+out:
+ kfree(pattern);
+}
+
+static int pattern_trig_activate(struct led_classdev *led_cdev)
+{
+ struct pattern_trig_data *data;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ if (!!led_cdev->pattern_set ^ !!led_cdev->pattern_clear) {
+ dev_warn(led_cdev->dev,
+ "Hardware pattern ops validation failed\n");
+ led_cdev->pattern_set = NULL;
+ led_cdev->pattern_clear = NULL;
+ }
+
+ data->is_indefinite = true;
+ data->last_repeat = -1;
+ mutex_init(&data->lock);
+ data->led_cdev = led_cdev;
+ led_set_trigger_data(led_cdev, data);
+ timer_setup(&data->timer, pattern_trig_timer_function, 0);
+ led_cdev->activated = true;
+
+ if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) {
+ pattern_init(led_cdev);
+ /*
+ * Mark as initialized even on pattern_init() error because
+ * any consecutive call to it would produce the same error.
+ */
+ led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER;
+ }
+
+ return 0;
+}
+
+static void pattern_trig_deactivate(struct led_classdev *led_cdev)
+{
+ struct pattern_trig_data *data = led_cdev->trigger_data;
+
+ if (!led_cdev->activated)
+ return;
+
+ if (led_cdev->pattern_clear)
+ led_cdev->pattern_clear(led_cdev);
+
+ del_timer_sync(&data->timer);
+
+ led_set_brightness(led_cdev, LED_OFF);
+ kfree(data);
+ led_cdev->activated = false;
+}
+
+static struct led_trigger pattern_led_trigger = {
+ .name = "pattern",
+ .activate = pattern_trig_activate,
+ .deactivate = pattern_trig_deactivate,
+ .groups = pattern_trig_groups,
+};
+
+static int __init pattern_trig_init(void)
+{
+ return led_trigger_register(&pattern_led_trigger);
+}
+
+static void __exit pattern_trig_exit(void)
+{
+ led_trigger_unregister(&pattern_led_trigger);
+}
+
+module_init(pattern_trig_init);
+module_exit(pattern_trig_exit);
+
+MODULE_AUTHOR("Raphael Teysseyre <rteysseyre@gmail.com>");
+MODULE_AUTHOR("Baolin Wang <baolin.wang@linaro.org>");
+MODULE_DESCRIPTION("LED Pattern trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-timer.c b/drivers/leds/trigger/ledtrig-timer.c
new file mode 100644
index 000000000..b4688d1d9
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-timer.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LED Kernel Timer Trigger
+ *
+ * Copyright 2005-2006 Openedhand Ltd.
+ *
+ * Author: Richard Purdie <rpurdie@openedhand.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+
+static ssize_t led_delay_on_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = led_trigger_get_led(dev);
+
+ return sprintf(buf, "%lu\n", led_cdev->blink_delay_on);
+}
+
+static ssize_t led_delay_on_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = led_trigger_get_led(dev);
+ unsigned long state;
+ ssize_t ret;
+
+ ret = kstrtoul(buf, 10, &state);
+ if (ret)
+ return ret;
+
+ led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off);
+ led_cdev->blink_delay_on = state;
+
+ return size;
+}
+
+static ssize_t led_delay_off_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_classdev *led_cdev = led_trigger_get_led(dev);
+
+ return sprintf(buf, "%lu\n", led_cdev->blink_delay_off);
+}
+
+static ssize_t led_delay_off_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = led_trigger_get_led(dev);
+ unsigned long state;
+ ssize_t ret;
+
+ ret = kstrtoul(buf, 10, &state);
+ if (ret)
+ return ret;
+
+ led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state);
+ led_cdev->blink_delay_off = state;
+
+ return size;
+}
+
+static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);
+static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
+
+static struct attribute *timer_trig_attrs[] = {
+ &dev_attr_delay_on.attr,
+ &dev_attr_delay_off.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(timer_trig);
+
+static void pattern_init(struct led_classdev *led_cdev)
+{
+ u32 *pattern;
+ unsigned int size = 0;
+
+ pattern = led_get_default_pattern(led_cdev, &size);
+ if (!pattern)
+ return;
+
+ if (size != 2) {
+ dev_warn(led_cdev->dev,
+ "Expected 2 but got %u values for delays pattern\n",
+ size);
+ goto out;
+ }
+
+ led_cdev->blink_delay_on = pattern[0];
+ led_cdev->blink_delay_off = pattern[1];
+ /* led_blink_set() called by caller */
+
+out:
+ kfree(pattern);
+}
+
+static int timer_trig_activate(struct led_classdev *led_cdev)
+{
+ if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) {
+ pattern_init(led_cdev);
+ /*
+ * Mark as initialized even on pattern_init() error because
+ * any consecutive call to it would produce the same error.
+ */
+ led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER;
+ }
+
+ /*
+ * If "set brightness to 0" is pending in workqueue, we don't
+ * want that to be reordered after blink_set()
+ */
+ flush_work(&led_cdev->set_brightness_work);
+ led_blink_set(led_cdev, &led_cdev->blink_delay_on,
+ &led_cdev->blink_delay_off);
+
+ return 0;
+}
+
+static void timer_trig_deactivate(struct led_classdev *led_cdev)
+{
+ /* Stop blinking */
+ led_set_brightness(led_cdev, LED_OFF);
+}
+
+static struct led_trigger timer_led_trigger = {
+ .name = "timer",
+ .activate = timer_trig_activate,
+ .deactivate = timer_trig_deactivate,
+ .groups = timer_trig_groups,
+};
+module_led_trigger(timer_led_trigger);
+
+MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>");
+MODULE_DESCRIPTION("Timer LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-transient.c b/drivers/leds/trigger/ledtrig-transient.c
new file mode 100644
index 000000000..80635183f
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-transient.c
@@ -0,0 +1,198 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// LED Kernel Transient Trigger
+//
+// Transient trigger allows one shot timer activation. Please refer to
+// Documentation/leds/ledtrig-transient.rst for details
+// Copyright (C) 2012 Shuah Khan <shuahkhan@gmail.com>
+//
+// Based on Richard Purdie's ledtrig-timer.c and Atsushi Nemoto's
+// ledtrig-heartbeat.c
+// Design and use-case input from Jonas Bonn <jonas@southpole.se> and
+// Neil Brown <neilb@suse.de>
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/leds.h>
+#include "../leds.h"
+
+struct transient_trig_data {
+ int activate;
+ int state;
+ int restore_state;
+ unsigned long duration;
+ struct timer_list timer;
+ struct led_classdev *led_cdev;
+};
+
+static void transient_timer_function(struct timer_list *t)
+{
+ struct transient_trig_data *transient_data =
+ from_timer(transient_data, t, timer);
+ struct led_classdev *led_cdev = transient_data->led_cdev;
+
+ transient_data->activate = 0;
+ led_set_brightness_nosleep(led_cdev, transient_data->restore_state);
+}
+
+static ssize_t transient_activate_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct transient_trig_data *transient_data =
+ led_trigger_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", transient_data->activate);
+}
+
+static ssize_t transient_activate_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct led_classdev *led_cdev = led_trigger_get_led(dev);
+ struct transient_trig_data *transient_data =
+ led_trigger_get_drvdata(dev);
+ unsigned long state;
+ ssize_t ret;
+
+ ret = kstrtoul(buf, 10, &state);
+ if (ret)
+ return ret;
+
+ if (state != 1 && state != 0)
+ return -EINVAL;
+
+ /* cancel the running timer */
+ if (state == 0 && transient_data->activate == 1) {
+ del_timer(&transient_data->timer);
+ transient_data->activate = state;
+ led_set_brightness_nosleep(led_cdev,
+ transient_data->restore_state);
+ return size;
+ }
+
+ /* start timer if there is no active timer */
+ if (state == 1 && transient_data->activate == 0 &&
+ transient_data->duration != 0) {
+ transient_data->activate = state;
+ led_set_brightness_nosleep(led_cdev, transient_data->state);
+ transient_data->restore_state =
+ (transient_data->state == LED_FULL) ? LED_OFF : LED_FULL;
+ mod_timer(&transient_data->timer,
+ jiffies + msecs_to_jiffies(transient_data->duration));
+ }
+
+ /* state == 0 && transient_data->activate == 0
+ timer is not active - just return */
+ /* state == 1 && transient_data->activate == 1
+ timer is already active - just return */
+
+ return size;
+}
+
+static ssize_t transient_duration_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct transient_trig_data *transient_data = led_trigger_get_drvdata(dev);
+
+ return sprintf(buf, "%lu\n", transient_data->duration);
+}
+
+static ssize_t transient_duration_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct transient_trig_data *transient_data =
+ led_trigger_get_drvdata(dev);
+ unsigned long state;
+ ssize_t ret;
+
+ ret = kstrtoul(buf, 10, &state);
+ if (ret)
+ return ret;
+
+ transient_data->duration = state;
+ return size;
+}
+
+static ssize_t transient_state_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct transient_trig_data *transient_data =
+ led_trigger_get_drvdata(dev);
+ int state;
+
+ state = (transient_data->state == LED_FULL) ? 1 : 0;
+ return sprintf(buf, "%d\n", state);
+}
+
+static ssize_t transient_state_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct transient_trig_data *transient_data =
+ led_trigger_get_drvdata(dev);
+ unsigned long state;
+ ssize_t ret;
+
+ ret = kstrtoul(buf, 10, &state);
+ if (ret)
+ return ret;
+
+ if (state != 1 && state != 0)
+ return -EINVAL;
+
+ transient_data->state = (state == 1) ? LED_FULL : LED_OFF;
+ return size;
+}
+
+static DEVICE_ATTR(activate, 0644, transient_activate_show,
+ transient_activate_store);
+static DEVICE_ATTR(duration, 0644, transient_duration_show,
+ transient_duration_store);
+static DEVICE_ATTR(state, 0644, transient_state_show, transient_state_store);
+
+static struct attribute *transient_trig_attrs[] = {
+ &dev_attr_activate.attr,
+ &dev_attr_duration.attr,
+ &dev_attr_state.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(transient_trig);
+
+static int transient_trig_activate(struct led_classdev *led_cdev)
+{
+ struct transient_trig_data *tdata;
+
+ tdata = kzalloc(sizeof(struct transient_trig_data), GFP_KERNEL);
+ if (!tdata)
+ return -ENOMEM;
+
+ led_set_trigger_data(led_cdev, tdata);
+ tdata->led_cdev = led_cdev;
+
+ timer_setup(&tdata->timer, transient_timer_function, 0);
+
+ return 0;
+}
+
+static void transient_trig_deactivate(struct led_classdev *led_cdev)
+{
+ struct transient_trig_data *transient_data = led_get_trigger_data(led_cdev);
+
+ del_timer_sync(&transient_data->timer);
+ led_set_brightness_nosleep(led_cdev, transient_data->restore_state);
+ kfree(transient_data);
+}
+
+static struct led_trigger transient_trigger = {
+ .name = "transient",
+ .activate = transient_trig_activate,
+ .deactivate = transient_trig_deactivate,
+ .groups = transient_trig_groups,
+};
+module_led_trigger(transient_trigger);
+
+MODULE_AUTHOR("Shuah Khan <shuahkhan@gmail.com>");
+MODULE_DESCRIPTION("Transient LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-tty.c b/drivers/leds/trigger/ledtrig-tty.c
new file mode 100644
index 000000000..3e69a7bde
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-tty.c
@@ -0,0 +1,188 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/delay.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <uapi/linux/serial.h>
+
+#define LEDTRIG_TTY_INTERVAL 50
+
+struct ledtrig_tty_data {
+ struct led_classdev *led_cdev;
+ struct delayed_work dwork;
+ struct mutex mutex;
+ const char *ttyname;
+ struct tty_struct *tty;
+ int rx, tx;
+};
+
+static void ledtrig_tty_restart(struct ledtrig_tty_data *trigger_data)
+{
+ schedule_delayed_work(&trigger_data->dwork, 0);
+}
+
+static ssize_t ttyname_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
+ ssize_t len = 0;
+
+ mutex_lock(&trigger_data->mutex);
+
+ if (trigger_data->ttyname)
+ len = sprintf(buf, "%s\n", trigger_data->ttyname);
+
+ mutex_unlock(&trigger_data->mutex);
+
+ return len;
+}
+
+static ssize_t ttyname_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t size)
+{
+ struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
+ char *ttyname;
+ ssize_t ret = size;
+ bool running;
+
+ if (size > 0 && buf[size - 1] == '\n')
+ size -= 1;
+
+ if (size) {
+ ttyname = kmemdup_nul(buf, size, GFP_KERNEL);
+ if (!ttyname)
+ return -ENOMEM;
+ } else {
+ ttyname = NULL;
+ }
+
+ mutex_lock(&trigger_data->mutex);
+
+ running = trigger_data->ttyname != NULL;
+
+ kfree(trigger_data->ttyname);
+ tty_kref_put(trigger_data->tty);
+ trigger_data->tty = NULL;
+
+ trigger_data->ttyname = ttyname;
+
+ mutex_unlock(&trigger_data->mutex);
+
+ if (ttyname && !running)
+ ledtrig_tty_restart(trigger_data);
+
+ return ret;
+}
+static DEVICE_ATTR_RW(ttyname);
+
+static void ledtrig_tty_work(struct work_struct *work)
+{
+ struct ledtrig_tty_data *trigger_data =
+ container_of(work, struct ledtrig_tty_data, dwork.work);
+ struct serial_icounter_struct icount;
+ int ret;
+
+ mutex_lock(&trigger_data->mutex);
+
+ if (!trigger_data->ttyname) {
+ /* exit without rescheduling */
+ mutex_unlock(&trigger_data->mutex);
+ return;
+ }
+
+ /* try to get the tty corresponding to $ttyname */
+ if (!trigger_data->tty) {
+ dev_t devno;
+ struct tty_struct *tty;
+ int ret;
+
+ ret = tty_dev_name_to_number(trigger_data->ttyname, &devno);
+ if (ret < 0)
+ /*
+ * A device with this name might appear later, so keep
+ * retrying.
+ */
+ goto out;
+
+ tty = tty_kopen_shared(devno);
+ if (IS_ERR(tty) || !tty)
+ /* What to do? retry or abort */
+ goto out;
+
+ trigger_data->tty = tty;
+ }
+
+ ret = tty_get_icount(trigger_data->tty, &icount);
+ if (ret) {
+ dev_info(trigger_data->tty->dev, "Failed to get icount, stopped polling\n");
+ mutex_unlock(&trigger_data->mutex);
+ return;
+ }
+
+ if (icount.rx != trigger_data->rx ||
+ icount.tx != trigger_data->tx) {
+ unsigned long interval = LEDTRIG_TTY_INTERVAL;
+
+ led_blink_set_oneshot(trigger_data->led_cdev, &interval,
+ &interval, 0);
+
+ trigger_data->rx = icount.rx;
+ trigger_data->tx = icount.tx;
+ }
+
+out:
+ mutex_unlock(&trigger_data->mutex);
+ schedule_delayed_work(&trigger_data->dwork,
+ msecs_to_jiffies(LEDTRIG_TTY_INTERVAL * 2));
+}
+
+static struct attribute *ledtrig_tty_attrs[] = {
+ &dev_attr_ttyname.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(ledtrig_tty);
+
+static int ledtrig_tty_activate(struct led_classdev *led_cdev)
+{
+ struct ledtrig_tty_data *trigger_data;
+
+ trigger_data = kzalloc(sizeof(*trigger_data), GFP_KERNEL);
+ if (!trigger_data)
+ return -ENOMEM;
+
+ led_set_trigger_data(led_cdev, trigger_data);
+
+ INIT_DELAYED_WORK(&trigger_data->dwork, ledtrig_tty_work);
+ trigger_data->led_cdev = led_cdev;
+ mutex_init(&trigger_data->mutex);
+
+ return 0;
+}
+
+static void ledtrig_tty_deactivate(struct led_classdev *led_cdev)
+{
+ struct ledtrig_tty_data *trigger_data = led_get_trigger_data(led_cdev);
+
+ cancel_delayed_work_sync(&trigger_data->dwork);
+
+ kfree(trigger_data->ttyname);
+ tty_kref_put(trigger_data->tty);
+ trigger_data->tty = NULL;
+
+ kfree(trigger_data);
+}
+
+static struct led_trigger ledtrig_tty = {
+ .name = "tty",
+ .activate = ledtrig_tty_activate,
+ .deactivate = ledtrig_tty_deactivate,
+ .groups = ledtrig_tty_groups,
+};
+module_led_trigger(ledtrig_tty);
+
+MODULE_AUTHOR("Uwe Kleine-König <u.kleine-koenig@pengutronix.de>");
+MODULE_DESCRIPTION("UART LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/uleds.c b/drivers/leds/uleds.c
new file mode 100644
index 000000000..7320337b2
--- /dev/null
+++ b/drivers/leds/uleds.c
@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Userspace driver for the LED subsystem
+ *
+ * Copyright (C) 2016 David Lechner <david@lechnology.com>
+ *
+ * Based on uinput.c: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
+ */
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/poll.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include <uapi/linux/uleds.h>
+
+#define ULEDS_NAME "uleds"
+
+enum uleds_state {
+ ULEDS_STATE_UNKNOWN,
+ ULEDS_STATE_REGISTERED,
+};
+
+struct uleds_device {
+ struct uleds_user_dev user_dev;
+ struct led_classdev led_cdev;
+ struct mutex mutex;
+ enum uleds_state state;
+ wait_queue_head_t waitq;
+ int brightness;
+ bool new_data;
+};
+
+static struct miscdevice uleds_misc;
+
+static void uleds_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct uleds_device *udev = container_of(led_cdev, struct uleds_device,
+ led_cdev);
+
+ if (udev->brightness != brightness) {
+ udev->brightness = brightness;
+ udev->new_data = true;
+ wake_up_interruptible(&udev->waitq);
+ }
+}
+
+static int uleds_open(struct inode *inode, struct file *file)
+{
+ struct uleds_device *udev;
+
+ udev = kzalloc(sizeof(*udev), GFP_KERNEL);
+ if (!udev)
+ return -ENOMEM;
+
+ udev->led_cdev.name = udev->user_dev.name;
+ udev->led_cdev.brightness_set = uleds_brightness_set;
+
+ mutex_init(&udev->mutex);
+ init_waitqueue_head(&udev->waitq);
+ udev->state = ULEDS_STATE_UNKNOWN;
+
+ file->private_data = udev;
+ stream_open(inode, file);
+
+ return 0;
+}
+
+static ssize_t uleds_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct uleds_device *udev = file->private_data;
+ const char *name;
+ int ret;
+
+ if (count == 0)
+ return 0;
+
+ ret = mutex_lock_interruptible(&udev->mutex);
+ if (ret)
+ return ret;
+
+ if (udev->state == ULEDS_STATE_REGISTERED) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ if (count != sizeof(struct uleds_user_dev)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (copy_from_user(&udev->user_dev, buffer,
+ sizeof(struct uleds_user_dev))) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ name = udev->user_dev.name;
+ if (!name[0] || !strcmp(name, ".") || !strcmp(name, "..") ||
+ strchr(name, '/')) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (udev->user_dev.max_brightness <= 0) {
+ ret = -EINVAL;
+ goto out;
+ }
+ udev->led_cdev.max_brightness = udev->user_dev.max_brightness;
+
+ ret = devm_led_classdev_register(uleds_misc.this_device,
+ &udev->led_cdev);
+ if (ret < 0)
+ goto out;
+
+ udev->new_data = true;
+ udev->state = ULEDS_STATE_REGISTERED;
+ ret = count;
+
+out:
+ mutex_unlock(&udev->mutex);
+
+ return ret;
+}
+
+static ssize_t uleds_read(struct file *file, char __user *buffer, size_t count,
+ loff_t *ppos)
+{
+ struct uleds_device *udev = file->private_data;
+ ssize_t retval;
+
+ if (count < sizeof(udev->brightness))
+ return 0;
+
+ do {
+ retval = mutex_lock_interruptible(&udev->mutex);
+ if (retval)
+ return retval;
+
+ if (udev->state != ULEDS_STATE_REGISTERED) {
+ retval = -ENODEV;
+ } else if (!udev->new_data && (file->f_flags & O_NONBLOCK)) {
+ retval = -EAGAIN;
+ } else if (udev->new_data) {
+ retval = copy_to_user(buffer, &udev->brightness,
+ sizeof(udev->brightness));
+ udev->new_data = false;
+ retval = sizeof(udev->brightness);
+ }
+
+ mutex_unlock(&udev->mutex);
+
+ if (retval)
+ break;
+
+ if (!(file->f_flags & O_NONBLOCK))
+ retval = wait_event_interruptible(udev->waitq,
+ udev->new_data ||
+ udev->state != ULEDS_STATE_REGISTERED);
+ } while (retval == 0);
+
+ return retval;
+}
+
+static __poll_t uleds_poll(struct file *file, poll_table *wait)
+{
+ struct uleds_device *udev = file->private_data;
+
+ poll_wait(file, &udev->waitq, wait);
+
+ if (udev->new_data)
+ return EPOLLIN | EPOLLRDNORM;
+
+ return 0;
+}
+
+static int uleds_release(struct inode *inode, struct file *file)
+{
+ struct uleds_device *udev = file->private_data;
+
+ if (udev->state == ULEDS_STATE_REGISTERED) {
+ udev->state = ULEDS_STATE_UNKNOWN;
+ devm_led_classdev_unregister(uleds_misc.this_device,
+ &udev->led_cdev);
+ }
+ kfree(udev);
+
+ return 0;
+}
+
+static const struct file_operations uleds_fops = {
+ .owner = THIS_MODULE,
+ .open = uleds_open,
+ .release = uleds_release,
+ .read = uleds_read,
+ .write = uleds_write,
+ .poll = uleds_poll,
+ .llseek = no_llseek,
+};
+
+static struct miscdevice uleds_misc = {
+ .fops = &uleds_fops,
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = ULEDS_NAME,
+};
+
+static int __init uleds_init(void)
+{
+ return misc_register(&uleds_misc);
+}
+module_init(uleds_init);
+
+static void __exit uleds_exit(void)
+{
+ misc_deregister(&uleds_misc);
+}
+module_exit(uleds_exit);
+
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_DESCRIPTION("Userspace driver for the LED subsystem");
+MODULE_LICENSE("GPL");