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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/leds/rgb
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/leds/rgb')
-rw-r--r--drivers/leds/rgb/Kconfig54
-rw-r--r--drivers/leds/rgb/Makefile6
-rw-r--r--drivers/leds/rgb/leds-group-multicolor.c169
-rw-r--r--drivers/leds/rgb/leds-mt6370-rgb.c1011
-rw-r--r--drivers/leds/rgb/leds-pwm-multicolor.c190
-rw-r--r--drivers/leds/rgb/leds-qcom-lpg.c1544
6 files changed, 2974 insertions, 0 deletions
diff --git a/drivers/leds/rgb/Kconfig b/drivers/leds/rgb/Kconfig
new file mode 100644
index 0000000000..183bccc06c
--- /dev/null
+++ b/drivers/leds/rgb/Kconfig
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: GPL-2.0
+
+if LEDS_CLASS_MULTICOLOR
+
+config LEDS_GROUP_MULTICOLOR
+ tristate "LEDs group multi-color support"
+ depends on OF || COMPILE_TEST
+ help
+ This option enables support for monochrome LEDs that are grouped
+ into multicolor LEDs which is useful in the case where LEDs of
+ different colors are physically grouped in a single multi-color LED
+ and driven by a controller that doesn't have multi-color support.
+
+ To compile this driver as a module, choose M here: the module
+ will be called leds-group-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.
+
+config LEDS_MT6370_RGB
+ tristate "LED Support for MediaTek MT6370 PMIC"
+ depends on MFD_MT6370
+ select LINEAR_RANGES
+ help
+ Say Y here to enable support for MT6370_RGB LED device.
+ In MT6370, there are four channel current-sink LED drivers that
+ support hardware pattern for constant current, PWM, and breath mode.
+ Isink4 channel can also be used as a CHG_VIN power good indicator.
+
+ This driver can also be built as a module. If so, the module
+ will be called "leds-mt6370-rgb".
+
+endif # LEDS_CLASS_MULTICOLOR
diff --git a/drivers/leds/rgb/Makefile b/drivers/leds/rgb/Makefile
new file mode 100644
index 0000000000..c11cc56384
--- /dev/null
+++ b/drivers/leds/rgb/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_LEDS_GROUP_MULTICOLOR) += leds-group-multicolor.o
+obj-$(CONFIG_LEDS_PWM_MULTICOLOR) += leds-pwm-multicolor.o
+obj-$(CONFIG_LEDS_QCOM_LPG) += leds-qcom-lpg.o
+obj-$(CONFIG_LEDS_MT6370_RGB) += leds-mt6370-rgb.o
diff --git a/drivers/leds/rgb/leds-group-multicolor.c b/drivers/leds/rgb/leds-group-multicolor.c
new file mode 100644
index 0000000000..39f58be32a
--- /dev/null
+++ b/drivers/leds/rgb/leds-group-multicolor.c
@@ -0,0 +1,169 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Multi-color LED built with monochromatic LED devices
+ *
+ * This driver groups several monochromatic LED devices in a single multicolor LED device.
+ *
+ * Compared to handling this grouping in user-space, the benefits are:
+ * - The state of the monochromatic LED relative to each other is always consistent.
+ * - The sysfs interface of the LEDs can be used for the group as a whole.
+ *
+ * Copyright 2023 Jean-Jacques Hiblot <jjhiblot@traphandler.com>
+ */
+
+#include <linux/err.h>
+#include <linux/leds.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/math.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+
+struct leds_multicolor {
+ struct led_classdev_mc mc_cdev;
+ struct led_classdev **monochromatics;
+};
+
+static int leds_gmc_set(struct led_classdev *cdev, enum led_brightness brightness)
+{
+ struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev);
+ struct leds_multicolor *priv = container_of(mc_cdev, struct leds_multicolor, mc_cdev);
+ const unsigned int group_max_brightness = mc_cdev->led_cdev.max_brightness;
+ int i;
+
+ for (i = 0; i < mc_cdev->num_colors; i++) {
+ struct led_classdev *mono = priv->monochromatics[i];
+ const unsigned int mono_max_brightness = mono->max_brightness;
+ unsigned int intensity = mc_cdev->subled_info[i].intensity;
+ int mono_brightness;
+
+ /*
+ * Scale the brightness according to relative intensity of the
+ * color AND the max brightness of the monochromatic LED.
+ */
+ mono_brightness = DIV_ROUND_CLOSEST(brightness * intensity * mono_max_brightness,
+ group_max_brightness * group_max_brightness);
+
+ led_set_brightness(mono, mono_brightness);
+ }
+
+ return 0;
+}
+
+static void restore_sysfs_write_access(void *data)
+{
+ struct led_classdev *led_cdev = data;
+
+ /* Restore the write acccess to the LED */
+ mutex_lock(&led_cdev->led_access);
+ led_sysfs_enable(led_cdev);
+ mutex_unlock(&led_cdev->led_access);
+}
+
+static int leds_gmc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct led_init_data init_data = {};
+ struct led_classdev *cdev;
+ struct mc_subled *subled;
+ struct leds_multicolor *priv;
+ unsigned int max_brightness = 0;
+ int i, ret, count = 0;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ for (;;) {
+ struct led_classdev *led_cdev;
+
+ led_cdev = devm_of_led_get_optional(dev, count);
+ if (IS_ERR(led_cdev))
+ return dev_err_probe(dev, PTR_ERR(led_cdev), "Unable to get LED #%d",
+ count);
+ if (!led_cdev)
+ break;
+
+ priv->monochromatics = devm_krealloc_array(dev, priv->monochromatics,
+ count + 1, sizeof(*priv->monochromatics),
+ GFP_KERNEL);
+ if (!priv->monochromatics)
+ return -ENOMEM;
+
+ priv->monochromatics[count] = led_cdev;
+
+ max_brightness = max(max_brightness, led_cdev->max_brightness);
+
+ count++;
+ }
+
+ subled = devm_kcalloc(dev, count, sizeof(*subled), GFP_KERNEL);
+ if (!subled)
+ return -ENOMEM;
+ priv->mc_cdev.subled_info = subled;
+
+ for (i = 0; i < count; i++) {
+ struct led_classdev *led_cdev = priv->monochromatics[i];
+
+ subled[i].color_index = led_cdev->color;
+
+ /* Configure the LED intensity to its maximum */
+ subled[i].intensity = max_brightness;
+ }
+
+ /* Initialise the multicolor's LED class device */
+ cdev = &priv->mc_cdev.led_cdev;
+ cdev->flags = LED_CORE_SUSPENDRESUME;
+ cdev->brightness_set_blocking = leds_gmc_set;
+ cdev->max_brightness = max_brightness;
+ cdev->color = LED_COLOR_ID_MULTI;
+ priv->mc_cdev.num_colors = count;
+
+ init_data.fwnode = dev_fwnode(dev);
+ ret = devm_led_classdev_multicolor_register_ext(dev, &priv->mc_cdev, &init_data);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to register multicolor LED for %s.\n",
+ cdev->name);
+
+ ret = leds_gmc_set(cdev, cdev->brightness);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to set LED value for %s.", cdev->name);
+
+ for (i = 0; i < count; i++) {
+ struct led_classdev *led_cdev = priv->monochromatics[i];
+
+ /*
+ * Make the individual LED sysfs interface read-only to prevent the user
+ * to change the brightness of the individual LEDs of the group.
+ */
+ mutex_lock(&led_cdev->led_access);
+ led_sysfs_disable(led_cdev);
+ mutex_unlock(&led_cdev->led_access);
+
+ /* Restore the write access to the LED sysfs when the group is destroyed */
+ devm_add_action_or_reset(dev, restore_sysfs_write_access, led_cdev);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id of_leds_group_multicolor_match[] = {
+ { .compatible = "leds-group-multicolor" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, of_leds_group_multicolor_match);
+
+static struct platform_driver leds_group_multicolor_driver = {
+ .probe = leds_gmc_probe,
+ .driver = {
+ .name = "leds_group_multicolor",
+ .of_match_table = of_leds_group_multicolor_match,
+ }
+};
+module_platform_driver(leds_group_multicolor_driver);
+
+MODULE_AUTHOR("Jean-Jacques Hiblot <jjhiblot@traphandler.com>");
+MODULE_DESCRIPTION("LEDs group multicolor driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:leds-group-multicolor");
diff --git a/drivers/leds/rgb/leds-mt6370-rgb.c b/drivers/leds/rgb/leds-mt6370-rgb.c
new file mode 100644
index 0000000000..bb62431efe
--- /dev/null
+++ b/drivers/leds/rgb/leds-mt6370-rgb.c
@@ -0,0 +1,1011 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Richtek Technology Corp.
+ *
+ * Authors:
+ * ChiYuan Huang <cy_huang@richtek.com>
+ * Alice Chen <alice_chen@richtek.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/led-class-multicolor.h>
+#include <linux/linear_range.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/regmap.h>
+#include <linux/util_macros.h>
+
+#include <asm/unaligned.h>
+
+enum {
+ MT6370_LED_ISNK1 = 0,
+ MT6370_LED_ISNK2,
+ MT6370_LED_ISNK3,
+ MT6370_LED_ISNK4,
+ MT6370_MAX_LEDS
+};
+
+enum mt6370_led_mode {
+ MT6370_LED_PWM_MODE = 0,
+ MT6370_LED_BREATH_MODE,
+ MT6370_LED_REG_MODE,
+ MT6370_LED_MAX_MODE
+};
+
+enum mt6370_led_field {
+ F_RGB_EN = 0,
+ F_CHGIND_EN,
+ F_LED1_CURR,
+ F_LED2_CURR,
+ F_LED3_CURR,
+ F_LED4_CURR,
+ F_LED1_MODE,
+ F_LED2_MODE,
+ F_LED3_MODE,
+ F_LED4_MODE,
+ F_LED1_DUTY,
+ F_LED2_DUTY,
+ F_LED3_DUTY,
+ F_LED4_DUTY,
+ F_LED1_FREQ,
+ F_LED2_FREQ,
+ F_LED3_FREQ,
+ F_LED4_FREQ,
+ F_MAX_FIELDS
+};
+
+enum mt6370_led_ranges {
+ R_LED123_CURR = 0,
+ R_LED4_CURR,
+ R_LED_TRFON,
+ R_LED_TOFF,
+ R_MAX_RANGES
+};
+
+enum mt6370_pattern {
+ P_LED_TR1 = 0,
+ P_LED_TR2,
+ P_LED_TF1,
+ P_LED_TF2,
+ P_LED_TON,
+ P_LED_TOFF,
+ P_MAX_PATTERNS
+};
+
+#define MT6370_REG_DEV_INFO 0x100
+#define MT6370_REG_RGB1_DIM 0x182
+#define MT6370_REG_RGB2_DIM 0x183
+#define MT6370_REG_RGB3_DIM 0x184
+#define MT6370_REG_RGB_EN 0x185
+#define MT6370_REG_RGB1_ISNK 0x186
+#define MT6370_REG_RGB2_ISNK 0x187
+#define MT6370_REG_RGB3_ISNK 0x188
+#define MT6370_REG_RGB1_TR 0x189
+#define MT6370_REG_RGB_CHRIND_DIM 0x192
+#define MT6370_REG_RGB_CHRIND_CTRL 0x193
+#define MT6370_REG_RGB_CHRIND_TR 0x194
+
+#define MT6372_REG_RGB_EN 0x182
+#define MT6372_REG_RGB1_ISNK 0x183
+#define MT6372_REG_RGB2_ISNK 0x184
+#define MT6372_REG_RGB3_ISNK 0x185
+#define MT6372_REG_RGB4_ISNK 0x186
+#define MT6372_REG_RGB1_DIM 0x187
+#define MT6372_REG_RGB2_DIM 0x188
+#define MT6372_REG_RGB3_DIM 0x189
+#define MT6372_REG_RGB4_DIM 0x18A
+#define MT6372_REG_RGB12_FREQ 0x18B
+#define MT6372_REG_RGB34_FREQ 0x18C
+#define MT6372_REG_RGB1_TR 0x18D
+
+#define MT6370_VENDOR_ID_MASK GENMASK(7, 4)
+#define MT6372_VENDOR_ID 0x9
+#define MT6372C_VENDOR_ID 0xb
+#define MT6370_CHEN_BIT(id) BIT(MT6370_LED_ISNK4 - id)
+#define MT6370_VIRTUAL_MULTICOLOR 5
+#define MC_CHANNEL_NUM 3
+#define MT6370_PWM_DUTY (BIT(5) - 1)
+#define MT6372_PWM_DUTY (BIT(8) - 1)
+
+struct mt6370_led {
+ /*
+ * If the color of the LED in DT is set to
+ * - 'LED_COLOR_ID_RGB'
+ * - 'LED_COLOR_ID_MULTI'
+ * The member 'index' of this struct will be set to
+ * 'MT6370_VIRTUAL_MULTICOLOR'.
+ * If so, this LED will choose 'struct led_classdev_mc mc' to use.
+ * Instead, if the member 'index' of this struct is set to
+ * 'MT6370_LED_ISNK1' ~ 'MT6370_LED_ISNK4', then this LED will choose
+ * 'struct led_classdev isink' to use.
+ */
+ union {
+ struct led_classdev isink;
+ struct led_classdev_mc mc;
+ };
+ struct mt6370_priv *priv;
+ enum led_default_state default_state;
+ u32 index;
+};
+
+struct mt6370_pdata {
+ const unsigned int *tfreq;
+ unsigned int tfreq_len;
+ u16 reg_rgb1_tr;
+ s16 reg_rgb_chrind_tr;
+ u8 pwm_duty;
+};
+
+struct mt6370_priv {
+ /* Per LED access lock */
+ struct mutex lock;
+ struct regmap *regmap;
+ struct regmap_field *fields[F_MAX_FIELDS];
+ const struct reg_field *reg_fields;
+ const struct linear_range *ranges;
+ struct reg_cfg *reg_cfgs;
+ const struct mt6370_pdata *pdata;
+ unsigned int leds_count;
+ unsigned int leds_active;
+ struct mt6370_led leds[];
+};
+
+static const struct reg_field common_reg_fields[F_MAX_FIELDS] = {
+ [F_RGB_EN] = REG_FIELD(MT6370_REG_RGB_EN, 4, 7),
+ [F_CHGIND_EN] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 7, 7),
+ [F_LED1_CURR] = REG_FIELD(MT6370_REG_RGB1_ISNK, 0, 2),
+ [F_LED2_CURR] = REG_FIELD(MT6370_REG_RGB2_ISNK, 0, 2),
+ [F_LED3_CURR] = REG_FIELD(MT6370_REG_RGB3_ISNK, 0, 2),
+ [F_LED4_CURR] = REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 0, 1),
+ [F_LED1_MODE] = REG_FIELD(MT6370_REG_RGB1_DIM, 5, 6),
+ [F_LED2_MODE] = REG_FIELD(MT6370_REG_RGB2_DIM, 5, 6),
+ [F_LED3_MODE] = REG_FIELD(MT6370_REG_RGB3_DIM, 5, 6),
+ [F_LED4_MODE] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 5, 6),
+ [F_LED1_DUTY] = REG_FIELD(MT6370_REG_RGB1_DIM, 0, 4),
+ [F_LED2_DUTY] = REG_FIELD(MT6370_REG_RGB2_DIM, 0, 4),
+ [F_LED3_DUTY] = REG_FIELD(MT6370_REG_RGB3_DIM, 0, 4),
+ [F_LED4_DUTY] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 0, 4),
+ [F_LED1_FREQ] = REG_FIELD(MT6370_REG_RGB1_ISNK, 3, 5),
+ [F_LED2_FREQ] = REG_FIELD(MT6370_REG_RGB2_ISNK, 3, 5),
+ [F_LED3_FREQ] = REG_FIELD(MT6370_REG_RGB3_ISNK, 3, 5),
+ [F_LED4_FREQ] = REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 2, 4),
+};
+
+static const struct reg_field mt6372_reg_fields[F_MAX_FIELDS] = {
+ [F_RGB_EN] = REG_FIELD(MT6372_REG_RGB_EN, 4, 7),
+ [F_CHGIND_EN] = REG_FIELD(MT6372_REG_RGB_EN, 3, 3),
+ [F_LED1_CURR] = REG_FIELD(MT6372_REG_RGB1_ISNK, 0, 3),
+ [F_LED2_CURR] = REG_FIELD(MT6372_REG_RGB2_ISNK, 0, 3),
+ [F_LED3_CURR] = REG_FIELD(MT6372_REG_RGB3_ISNK, 0, 3),
+ [F_LED4_CURR] = REG_FIELD(MT6372_REG_RGB4_ISNK, 0, 3),
+ [F_LED1_MODE] = REG_FIELD(MT6372_REG_RGB1_ISNK, 6, 7),
+ [F_LED2_MODE] = REG_FIELD(MT6372_REG_RGB2_ISNK, 6, 7),
+ [F_LED3_MODE] = REG_FIELD(MT6372_REG_RGB3_ISNK, 6, 7),
+ [F_LED4_MODE] = REG_FIELD(MT6372_REG_RGB4_ISNK, 6, 7),
+ [F_LED1_DUTY] = REG_FIELD(MT6372_REG_RGB1_DIM, 0, 7),
+ [F_LED2_DUTY] = REG_FIELD(MT6372_REG_RGB2_DIM, 0, 7),
+ [F_LED3_DUTY] = REG_FIELD(MT6372_REG_RGB3_DIM, 0, 7),
+ [F_LED4_DUTY] = REG_FIELD(MT6372_REG_RGB4_DIM, 0, 7),
+ [F_LED1_FREQ] = REG_FIELD(MT6372_REG_RGB12_FREQ, 5, 7),
+ [F_LED2_FREQ] = REG_FIELD(MT6372_REG_RGB12_FREQ, 2, 4),
+ [F_LED3_FREQ] = REG_FIELD(MT6372_REG_RGB34_FREQ, 5, 7),
+ [F_LED4_FREQ] = REG_FIELD(MT6372_REG_RGB34_FREQ, 2, 4),
+};
+
+/* Current unit: microamp, time unit: millisecond */
+static const struct linear_range common_led_ranges[R_MAX_RANGES] = {
+ [R_LED123_CURR] = { 4000, 1, 6, 4000 },
+ [R_LED4_CURR] = { 2000, 1, 3, 2000 },
+ [R_LED_TRFON] = { 125, 0, 15, 200 },
+ [R_LED_TOFF] = { 250, 0, 15, 400 },
+};
+
+static const struct linear_range mt6372_led_ranges[R_MAX_RANGES] = {
+ [R_LED123_CURR] = { 2000, 1, 14, 2000 },
+ [R_LED4_CURR] = { 2000, 1, 14, 2000 },
+ [R_LED_TRFON] = { 125, 0, 15, 250 },
+ [R_LED_TOFF] = { 250, 0, 15, 500 },
+};
+
+static const unsigned int common_tfreqs[] = {
+ 10000, 5000, 2000, 1000, 500, 200, 5, 1,
+};
+
+static const unsigned int mt6372_tfreqs[] = {
+ 8000, 4000, 2000, 1000, 500, 250, 8, 4,
+};
+
+static const struct mt6370_pdata common_pdata = {
+ .tfreq = common_tfreqs,
+ .tfreq_len = ARRAY_SIZE(common_tfreqs),
+ .pwm_duty = MT6370_PWM_DUTY,
+ .reg_rgb1_tr = MT6370_REG_RGB1_TR,
+ .reg_rgb_chrind_tr = MT6370_REG_RGB_CHRIND_TR,
+};
+
+static const struct mt6370_pdata mt6372_pdata = {
+ .tfreq = mt6372_tfreqs,
+ .tfreq_len = ARRAY_SIZE(mt6372_tfreqs),
+ .pwm_duty = MT6372_PWM_DUTY,
+ .reg_rgb1_tr = MT6372_REG_RGB1_TR,
+ .reg_rgb_chrind_tr = -1,
+};
+
+static enum mt6370_led_field mt6370_get_led_current_field(unsigned int led_no)
+{
+ switch (led_no) {
+ case MT6370_LED_ISNK1:
+ return F_LED1_CURR;
+ case MT6370_LED_ISNK2:
+ return F_LED2_CURR;
+ case MT6370_LED_ISNK3:
+ return F_LED3_CURR;
+ default:
+ return F_LED4_CURR;
+ }
+}
+
+static int mt6370_set_led_brightness(struct mt6370_priv *priv, unsigned int led_no,
+ unsigned int level)
+{
+ enum mt6370_led_field sel_field;
+
+ sel_field = mt6370_get_led_current_field(led_no);
+
+ return regmap_field_write(priv->fields[sel_field], level);
+}
+
+static int mt6370_get_led_brightness(struct mt6370_priv *priv, unsigned int led_no,
+ unsigned int *level)
+{
+ enum mt6370_led_field sel_field;
+
+ sel_field = mt6370_get_led_current_field(led_no);
+
+ return regmap_field_read(priv->fields[sel_field], level);
+}
+
+static int mt6370_set_led_duty(struct mt6370_priv *priv, unsigned int led_no, unsigned int ton,
+ unsigned int toff)
+{
+ const struct mt6370_pdata *pdata = priv->pdata;
+ enum mt6370_led_field sel_field;
+ unsigned int divisor, ratio;
+
+ divisor = pdata->pwm_duty;
+ ratio = ton * divisor / (ton + toff);
+
+ switch (led_no) {
+ case MT6370_LED_ISNK1:
+ sel_field = F_LED1_DUTY;
+ break;
+ case MT6370_LED_ISNK2:
+ sel_field = F_LED2_DUTY;
+ break;
+ case MT6370_LED_ISNK3:
+ sel_field = F_LED3_DUTY;
+ break;
+ default:
+ sel_field = F_LED4_DUTY;
+ break;
+ }
+
+ return regmap_field_write(priv->fields[sel_field], ratio);
+}
+
+static int mt6370_set_led_freq(struct mt6370_priv *priv, unsigned int led_no, unsigned int ton,
+ unsigned int toff)
+{
+ const struct mt6370_pdata *pdata = priv->pdata;
+ enum mt6370_led_field sel_field;
+ unsigned int tfreq_len = pdata->tfreq_len;
+ unsigned int tsum, sel;
+
+ tsum = ton + toff;
+
+ if (tsum > pdata->tfreq[0] || tsum < pdata->tfreq[tfreq_len - 1])
+ return -EOPNOTSUPP;
+
+ sel = find_closest_descending(tsum, pdata->tfreq, tfreq_len);
+
+ switch (led_no) {
+ case MT6370_LED_ISNK1:
+ sel_field = F_LED1_FREQ;
+ break;
+ case MT6370_LED_ISNK2:
+ sel_field = F_LED2_FREQ;
+ break;
+ case MT6370_LED_ISNK3:
+ sel_field = F_LED3_FREQ;
+ break;
+ default:
+ sel_field = F_LED4_FREQ;
+ break;
+ }
+
+ return regmap_field_write(priv->fields[sel_field], sel);
+}
+
+static void mt6370_get_breath_reg_base(struct mt6370_priv *priv, unsigned int led_no,
+ unsigned int *base)
+{
+ const struct mt6370_pdata *pdata = priv->pdata;
+
+ if (pdata->reg_rgb_chrind_tr < 0) {
+ *base = pdata->reg_rgb1_tr + led_no * 3;
+ return;
+ }
+
+ switch (led_no) {
+ case MT6370_LED_ISNK1:
+ case MT6370_LED_ISNK2:
+ case MT6370_LED_ISNK3:
+ *base = pdata->reg_rgb1_tr + led_no * 3;
+ break;
+ default:
+ *base = pdata->reg_rgb_chrind_tr;
+ break;
+ }
+}
+
+static int mt6370_gen_breath_pattern(struct mt6370_priv *priv, struct led_pattern *pattern, u32 len,
+ u8 *pattern_val, u32 val_len)
+{
+ enum mt6370_led_ranges sel_range;
+ struct led_pattern *curr;
+ unsigned int sel;
+ u32 val = 0;
+ int i;
+
+ if (len < P_MAX_PATTERNS && val_len < P_MAX_PATTERNS / 2)
+ return -EINVAL;
+
+ /*
+ * Pattern list
+ * tr1: byte 0, b'[7:4]
+ * tr2: byte 0, b'[3:0]
+ * tf1: byte 1, b'[7:4]
+ * tf2: byte 1, b'[3:0]
+ * ton: byte 2, b'[7:4]
+ * toff: byte 2, b'[3:0]
+ */
+ for (i = 0; i < P_MAX_PATTERNS; i++) {
+ curr = pattern + i;
+
+ sel_range = i == P_LED_TOFF ? R_LED_TOFF : R_LED_TRFON;
+
+ linear_range_get_selector_within(priv->ranges + sel_range, curr->delta_t, &sel);
+
+ if (i % 2) {
+ val |= sel;
+ } else {
+ val <<= 8;
+ val |= sel << 4;
+ }
+ }
+
+ put_unaligned_be24(val, pattern_val);
+
+ return 0;
+}
+
+static int mt6370_set_led_mode(struct mt6370_priv *priv, unsigned int led_no,
+ enum mt6370_led_mode mode)
+{
+ enum mt6370_led_field sel_field;
+
+ switch (led_no) {
+ case MT6370_LED_ISNK1:
+ sel_field = F_LED1_MODE;
+ break;
+ case MT6370_LED_ISNK2:
+ sel_field = F_LED2_MODE;
+ break;
+ case MT6370_LED_ISNK3:
+ sel_field = F_LED3_MODE;
+ break;
+ default:
+ sel_field = F_LED4_MODE;
+ break;
+ }
+
+ return regmap_field_write(priv->fields[sel_field], mode);
+}
+
+static int mt6370_mc_brightness_set(struct led_classdev *lcdev, enum led_brightness level)
+{
+ struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+ struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+ struct mt6370_priv *priv = led->priv;
+ struct mc_subled *subled;
+ unsigned int enable, disable;
+ int i, ret;
+
+ mutex_lock(&priv->lock);
+
+ led_mc_calc_color_components(mccdev, level);
+
+ ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+ if (ret)
+ goto out_unlock;
+
+ disable = enable;
+
+ for (i = 0; i < mccdev->num_colors; i++) {
+ u32 brightness;
+
+ subled = mccdev->subled_info + i;
+ brightness = min(subled->brightness, lcdev->max_brightness);
+ disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+ if (level == 0) {
+ enable &= ~MT6370_CHEN_BIT(subled->channel);
+
+ ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_REG_MODE);
+ if (ret)
+ goto out_unlock;
+
+ continue;
+ }
+
+ if (brightness == 0) {
+ enable &= ~MT6370_CHEN_BIT(subled->channel);
+ continue;
+ }
+
+ enable |= MT6370_CHEN_BIT(subled->channel);
+
+ ret = mt6370_set_led_brightness(priv, subled->channel, brightness);
+ if (ret)
+ goto out_unlock;
+ }
+
+ ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int mt6370_mc_blink_set(struct led_classdev *lcdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+ struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+ struct mt6370_priv *priv = led->priv;
+ struct mc_subled *subled;
+ unsigned int enable, disable;
+ int i, ret;
+
+ mutex_lock(&priv->lock);
+
+ if (!*delay_on && !*delay_off)
+ *delay_on = *delay_off = 500;
+
+ ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+ if (ret)
+ goto out_unlock;
+
+ disable = enable;
+
+ for (i = 0; i < mccdev->num_colors; i++) {
+ subled = mccdev->subled_info + i;
+
+ disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+ ret = mt6370_set_led_duty(priv, subled->channel, *delay_on, *delay_off);
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_freq(priv, subled->channel, *delay_on, *delay_off);
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_PWM_MODE);
+ if (ret)
+ goto out_unlock;
+ }
+
+ /* Toggle to make pattern timing the same */
+ ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int mt6370_mc_pattern_set(struct led_classdev *lcdev, struct led_pattern *pattern, u32 len,
+ int repeat)
+{
+ struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+ struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+ struct mt6370_priv *priv = led->priv;
+ struct mc_subled *subled;
+ unsigned int reg_base, enable, disable;
+ u8 params[P_MAX_PATTERNS / 2];
+ int i, ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = mt6370_gen_breath_pattern(priv, pattern, len, params, sizeof(params));
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+ if (ret)
+ goto out_unlock;
+
+ disable = enable;
+
+ for (i = 0; i < mccdev->num_colors; i++) {
+ subled = mccdev->subled_info + i;
+
+ mt6370_get_breath_reg_base(priv, subled->channel, &reg_base);
+ disable &= ~MT6370_CHEN_BIT(subled->channel);
+
+ ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_BREATH_MODE);
+ if (ret)
+ goto out_unlock;
+ }
+
+ /* Toggle to make pattern timing be the same */
+ ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static inline int mt6370_mc_pattern_clear(struct led_classdev *lcdev)
+{
+ struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
+ struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
+ struct mt6370_priv *priv = led->priv;
+ struct mc_subled *subled;
+ int i, ret;
+
+ mutex_lock(&led->priv->lock);
+
+ for (i = 0; i < mccdev->num_colors; i++) {
+ subled = mccdev->subled_info + i;
+
+ ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_REG_MODE);
+ if (ret)
+ break;
+ }
+
+ mutex_unlock(&led->priv->lock);
+
+ return ret;
+}
+
+static int mt6370_isnk_brightness_set(struct led_classdev *lcdev,
+ enum led_brightness level)
+{
+ struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+ struct mt6370_priv *priv = led->priv;
+ unsigned int enable;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+ if (ret)
+ goto out_unlock;
+
+ if (level == 0) {
+ enable &= ~MT6370_CHEN_BIT(led->index);
+
+ ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
+ if (ret)
+ goto out_unlock;
+ } else {
+ enable |= MT6370_CHEN_BIT(led->index);
+
+ ret = mt6370_set_led_brightness(priv, led->index, level);
+ if (ret)
+ goto out_unlock;
+ }
+
+ ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int mt6370_isnk_blink_set(struct led_classdev *lcdev, unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+ struct mt6370_priv *priv = led->priv;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ if (!*delay_on && !*delay_off)
+ *delay_on = *delay_off = 500;
+
+ ret = mt6370_set_led_duty(priv, led->index, *delay_on, *delay_off);
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_freq(priv, led->index, *delay_on, *delay_off);
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_PWM_MODE);
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int mt6370_isnk_pattern_set(struct led_classdev *lcdev, struct led_pattern *pattern, u32 len,
+ int repeat)
+{
+ struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+ struct mt6370_priv *priv = led->priv;
+ unsigned int reg_base;
+ u8 params[P_MAX_PATTERNS / 2];
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = mt6370_gen_breath_pattern(priv, pattern, len, params, sizeof(params));
+ if (ret)
+ goto out_unlock;
+
+ mt6370_get_breath_reg_base(priv, led->index, &reg_base);
+
+ ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
+ if (ret)
+ goto out_unlock;
+
+ ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_BREATH_MODE);
+
+out_unlock:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static inline int mt6370_isnk_pattern_clear(struct led_classdev *lcdev)
+{
+ struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
+ struct mt6370_priv *priv = led->priv;
+ int ret;
+
+ mutex_lock(&led->priv->lock);
+ ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
+ mutex_unlock(&led->priv->lock);
+
+ return ret;
+}
+
+static int mt6370_assign_multicolor_info(struct device *dev, struct mt6370_led *led,
+ struct fwnode_handle *fwnode)
+{
+ struct mt6370_priv *priv = led->priv;
+ struct fwnode_handle *child;
+ struct mc_subled *sub_led;
+ u32 num_color = 0;
+ int ret;
+
+ sub_led = devm_kcalloc(dev, MC_CHANNEL_NUM, sizeof(*sub_led), GFP_KERNEL);
+ if (!sub_led)
+ return -ENOMEM;
+
+ fwnode_for_each_child_node(fwnode, child) {
+ u32 reg, color;
+
+ ret = fwnode_property_read_u32(child, "reg", &reg);
+ if (ret || reg > MT6370_LED_ISNK3 || priv->leds_active & BIT(reg)) {
+ fwnode_handle_put(child);
+ return -EINVAL;
+ }
+
+ ret = fwnode_property_read_u32(child, "color", &color);
+ if (ret) {
+ fwnode_handle_put(child);
+ return dev_err_probe(dev, ret, "LED %d, no color specified\n", led->index);
+ }
+
+ priv->leds_active |= BIT(reg);
+ sub_led[num_color].color_index = color;
+ sub_led[num_color].channel = reg;
+ sub_led[num_color].intensity = 0;
+ num_color++;
+ }
+
+ if (num_color < 2)
+ return dev_err_probe(dev, -EINVAL,
+ "Multicolor must include 2 or more LED channels\n");
+
+ led->mc.num_colors = num_color;
+ led->mc.subled_info = sub_led;
+
+ return 0;
+}
+
+static int mt6370_init_led_properties(struct device *dev, struct mt6370_led *led,
+ struct led_init_data *init_data)
+{
+ struct mt6370_priv *priv = led->priv;
+ struct led_classdev *lcdev;
+ enum mt6370_led_ranges sel_range;
+ u32 max_uA, max_level;
+ int ret;
+
+ if (led->index == MT6370_VIRTUAL_MULTICOLOR) {
+ ret = mt6370_assign_multicolor_info(dev, led, init_data->fwnode);
+ if (ret)
+ return ret;
+
+ lcdev = &led->mc.led_cdev;
+ lcdev->brightness_set_blocking = mt6370_mc_brightness_set;
+ lcdev->blink_set = mt6370_mc_blink_set;
+ lcdev->pattern_set = mt6370_mc_pattern_set;
+ lcdev->pattern_clear = mt6370_mc_pattern_clear;
+ } else {
+ lcdev = &led->isink;
+ lcdev->brightness_set_blocking = mt6370_isnk_brightness_set;
+ lcdev->blink_set = mt6370_isnk_blink_set;
+ lcdev->pattern_set = mt6370_isnk_pattern_set;
+ lcdev->pattern_clear = mt6370_isnk_pattern_clear;
+ }
+
+ ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp", &max_uA);
+ if (ret) {
+ dev_warn(dev, "Not specified led-max-microamp, config to the minimum\n");
+ max_uA = 0;
+ }
+
+ if (led->index == MT6370_LED_ISNK4)
+ sel_range = R_LED4_CURR;
+ else
+ sel_range = R_LED123_CURR;
+
+ linear_range_get_selector_within(priv->ranges + sel_range, max_uA, &max_level);
+
+ lcdev->max_brightness = max_level;
+
+ led->default_state = led_init_default_state_get(init_data->fwnode);
+
+ return 0;
+}
+
+static int mt6370_isnk_init_default_state(struct mt6370_led *led)
+{
+ struct mt6370_priv *priv = led->priv;
+ unsigned int enable, level;
+ int ret;
+
+ ret = mt6370_get_led_brightness(priv, led->index, &level);
+ if (ret)
+ return ret;
+
+ ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
+ if (ret)
+ return ret;
+
+ if (!(enable & MT6370_CHEN_BIT(led->index)))
+ level = 0;
+
+ switch (led->default_state) {
+ case LEDS_DEFSTATE_ON:
+ led->isink.brightness = led->isink.max_brightness;
+ break;
+ case LEDS_DEFSTATE_KEEP:
+ led->isink.brightness = min(level, led->isink.max_brightness);
+ break;
+ default:
+ led->isink.brightness = 0;
+ break;
+ }
+
+ return mt6370_isnk_brightness_set(&led->isink, led->isink.brightness);
+}
+
+static int mt6370_multicolor_led_register(struct device *dev, struct mt6370_led *led,
+ struct led_init_data *init_data)
+{
+ int ret;
+
+ ret = mt6370_mc_brightness_set(&led->mc.led_cdev, 0);
+ if (ret)
+ return dev_err_probe(dev, ret, "Couldn't set multicolor brightness\n");
+
+ ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc, init_data);
+ if (ret)
+ return dev_err_probe(dev, ret, "Couldn't register multicolor\n");
+
+ return 0;
+}
+
+static int mt6370_led_register(struct device *dev, struct mt6370_led *led,
+ struct led_init_data *init_data)
+{
+ struct mt6370_priv *priv = led->priv;
+ int ret;
+
+ if (led->index == MT6370_VIRTUAL_MULTICOLOR)
+ return mt6370_multicolor_led_register(dev, led, init_data);
+
+ /* If ISNK4 is declared, change its mode from HW auto to SW control */
+ if (led->index == MT6370_LED_ISNK4) {
+ ret = regmap_field_write(priv->fields[F_CHGIND_EN], 1);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to set CHRIND to SW\n");
+ }
+
+ ret = mt6370_isnk_init_default_state(led);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to init %d isnk state\n", led->index);
+
+ ret = devm_led_classdev_register_ext(dev, &led->isink, init_data);
+ if (ret)
+ return dev_err_probe(dev, ret, "Couldn't register isink %d\n", led->index);
+
+ return 0;
+}
+
+static int mt6370_check_vendor_info(struct mt6370_priv *priv)
+{
+ unsigned int devinfo, vid;
+ int ret;
+
+ ret = regmap_read(priv->regmap, MT6370_REG_DEV_INFO, &devinfo);
+ if (ret)
+ return ret;
+
+ vid = FIELD_GET(MT6370_VENDOR_ID_MASK, devinfo);
+ if (vid == MT6372_VENDOR_ID || vid == MT6372C_VENDOR_ID) {
+ priv->reg_fields = mt6372_reg_fields;
+ priv->ranges = mt6372_led_ranges;
+ priv->pdata = &mt6372_pdata;
+ } else {
+ /* Common for MT6370/71 */
+ priv->reg_fields = common_reg_fields;
+ priv->ranges = common_led_ranges;
+ priv->pdata = &common_pdata;
+ }
+
+ return 0;
+}
+
+static int mt6370_leds_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mt6370_priv *priv;
+ struct fwnode_handle *child;
+ size_t count;
+ unsigned int i = 0;
+ int ret;
+
+ count = device_get_child_node_count(dev);
+ if (!count || count > MT6370_MAX_LEDS)
+ return dev_err_probe(dev, -EINVAL,
+ "No child node or node count over max LED number %zu\n",
+ count);
+
+ priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->leds_count = count;
+ mutex_init(&priv->lock);
+
+ priv->regmap = dev_get_regmap(dev->parent, NULL);
+ if (!priv->regmap)
+ return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
+
+ ret = mt6370_check_vendor_info(priv);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to check vendor info\n");
+
+ ret = devm_regmap_field_bulk_alloc(dev, priv->regmap, priv->fields, priv->reg_fields,
+ F_MAX_FIELDS);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to allocate regmap field\n");
+
+ device_for_each_child_node(dev, child) {
+ struct mt6370_led *led = priv->leds + i++;
+ struct led_init_data init_data = { .fwnode = child };
+ u32 reg, color;
+
+ ret = fwnode_property_read_u32(child, "reg", &reg);
+ if (ret) {
+ dev_err(dev, "Failed to parse reg property\n");
+ goto fwnode_release;
+ }
+
+ if (reg >= MT6370_MAX_LEDS) {
+ ret = -EINVAL;
+ dev_err(dev, "Error reg property number\n");
+ goto fwnode_release;
+ }
+
+ ret = fwnode_property_read_u32(child, "color", &color);
+ if (ret) {
+ dev_err(dev, "Failed to parse color property\n");
+ goto fwnode_release;
+ }
+
+ if (color == LED_COLOR_ID_RGB || color == LED_COLOR_ID_MULTI)
+ reg = MT6370_VIRTUAL_MULTICOLOR;
+
+ if (priv->leds_active & BIT(reg)) {
+ ret = -EINVAL;
+ dev_err(dev, "Duplicate reg property\n");
+ goto fwnode_release;
+ }
+
+ priv->leds_active |= BIT(reg);
+
+ led->index = reg;
+ led->priv = priv;
+
+ ret = mt6370_init_led_properties(dev, led, &init_data);
+ if (ret)
+ goto fwnode_release;
+
+ ret = mt6370_led_register(dev, led, &init_data);
+ if (ret)
+ goto fwnode_release;
+ }
+
+ return 0;
+
+fwnode_release:
+ fwnode_handle_put(child);
+ return ret;
+}
+
+static const struct of_device_id mt6370_rgbled_device_table[] = {
+ { .compatible = "mediatek,mt6370-indicator" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mt6370_rgbled_device_table);
+
+static struct platform_driver mt6370_rgbled_driver = {
+ .driver = {
+ .name = "mt6370-indicator",
+ .of_match_table = mt6370_rgbled_device_table,
+ },
+ .probe = mt6370_leds_probe,
+};
+module_platform_driver(mt6370_rgbled_driver);
+
+MODULE_AUTHOR("Alice Chen <alice_chen@richtek.com>");
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("MediaTek MT6370 RGB LED Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/leds/rgb/leds-pwm-multicolor.c b/drivers/leds/rgb/leds-pwm-multicolor.c
new file mode 100644
index 0000000000..46cd062b8b
--- /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\n",
+ cdev->name);
+
+ 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 0000000000..df469aaa7e
--- /dev/null
+++ b/drivers/leds/rgb/leds-qcom-lpg.c
@@ -0,0 +1,1544 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2017-2022 Linaro Ltd
+ * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2023, Qualcomm Innovation Center, Inc. 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/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_HI_RES_PWM 0xc
+#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 PWM_CLK_SELECT_HI_RES_MASK GENMASK(2, 0)
+#define PWM_SIZE_HI_RES_MASK GENMASK(6, 4)
+#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_9BIT BIT(9)
+#define LPG_RESOLUTION_15BIT BIT(15)
+#define LPG_MAX_M 7
+#define LPG_MAX_PREDIV 6
+
+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
+ * @pwm_resolution_sel: pwm resolution selector
+ * @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;
+ unsigned int pwm_resolution_sel;
+
+ 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_clk_rates_hi_res[] = {0, 1024, 32768, 19200000, 76800000};
+static const unsigned int lpg_pre_divs[] = {1, 3, 5, 6};
+static const unsigned int lpg_pwm_resolution[] = {9};
+static const unsigned int lpg_pwm_resolution_hi_res[] = {8, 9, 10, 11, 12, 13, 14, 15};
+
+static int lpg_calc_freq(struct lpg_channel *chan, uint64_t period)
+{
+ unsigned int i, pwm_resolution_count, best_pwm_resolution_sel = 0;
+ const unsigned int *clk_rate_arr, *pwm_resolution_arr;
+ unsigned int clk_sel, clk_len, best_clk = 0;
+ unsigned int div, best_div = 0;
+ unsigned int m, best_m = 0;
+ unsigned int resolution;
+ unsigned int error;
+ unsigned int best_err = UINT_MAX;
+ u64 max_period, min_period;
+ u64 best_period = 0;
+ u64 max_res;
+
+ /*
+ * The PWM period is determined by:
+ *
+ * resolution * pre_div * 2^M
+ * period = --------------------------
+ * refclk
+ *
+ * Resolution = 2^9 bits for PWM or
+ * 2^{8, 9, 10, 11, 12, 13, 14, 15} bits for high resolution PWM
+ * pre_div = {1, 3, 5, 6} and
+ * M = [0..7].
+ *
+ * This allows for periods between 27uS and 384s for PWM channels and periods between
+ * 3uS and 24576s for high resolution PWMs.
+ * The PWM framework wants a period of equal or lower length than requested,
+ * reject anything below minimum period.
+ */
+
+ if (chan->subtype == LPG_SUBTYPE_HI_RES_PWM) {
+ clk_rate_arr = lpg_clk_rates_hi_res;
+ clk_len = ARRAY_SIZE(lpg_clk_rates_hi_res);
+ pwm_resolution_arr = lpg_pwm_resolution_hi_res;
+ pwm_resolution_count = ARRAY_SIZE(lpg_pwm_resolution_hi_res);
+ max_res = LPG_RESOLUTION_15BIT;
+ } else {
+ clk_rate_arr = lpg_clk_rates;
+ clk_len = ARRAY_SIZE(lpg_clk_rates);
+ pwm_resolution_arr = lpg_pwm_resolution;
+ pwm_resolution_count = ARRAY_SIZE(lpg_pwm_resolution);
+ max_res = LPG_RESOLUTION_9BIT;
+ }
+
+ min_period = div64_u64((u64)NSEC_PER_SEC * (1 << pwm_resolution_arr[0]),
+ clk_rate_arr[clk_len - 1]);
+ if (period <= min_period)
+ return -EINVAL;
+
+ /* Limit period to largest possible value, to avoid overflows */
+ max_period = div64_u64((u64)NSEC_PER_SEC * max_res * LPG_MAX_PREDIV * (1 << LPG_MAX_M),
+ 1024);
+ if (period > max_period)
+ period = max_period;
+
+ /*
+ * Search for the pre_div, refclk, resolution and M by solving the rewritten formula
+ * for each refclk, resolution and pre_div value:
+ *
+ * period * refclk
+ * M = log2 -------------------------------------
+ * NSEC_PER_SEC * pre_div * resolution
+ */
+
+ for (i = 0; i < pwm_resolution_count; i++) {
+ resolution = 1 << pwm_resolution_arr[i];
+ for (clk_sel = 1; clk_sel < clk_len; clk_sel++) {
+ u64 numerator = period * clk_rate_arr[clk_sel];
+
+ for (div = 0; div < ARRAY_SIZE(lpg_pre_divs); div++) {
+ u64 denominator = (u64)NSEC_PER_SEC * lpg_pre_divs[div] *
+ 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),
+ clk_rate_arr[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;
+ best_pwm_resolution_sel = i;
+ }
+ }
+ }
+ }
+ chan->clk_sel = best_clk;
+ chan->pre_div_sel = best_div;
+ chan->pre_div_exp = best_m;
+ chan->period = best_period;
+ chan->pwm_resolution_sel = best_pwm_resolution_sel;
+ return 0;
+}
+
+static void lpg_calc_duty(struct lpg_channel *chan, uint64_t duty)
+{
+ unsigned int max;
+ unsigned int val;
+ unsigned int clk_rate;
+
+ if (chan->subtype == LPG_SUBTYPE_HI_RES_PWM) {
+ max = LPG_RESOLUTION_15BIT - 1;
+ clk_rate = lpg_clk_rates_hi_res[chan->clk_sel];
+ } else {
+ max = LPG_RESOLUTION_9BIT - 1;
+ clk_rate = lpg_clk_rates[chan->clk_sel];
+ }
+
+ val = div64_u64(duty * clk_rate,
+ (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 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_HI_RES_PWM:
+ val |= FIELD_PREP(PWM_SIZE_HI_RES_MASK, chan->pwm_resolution_sel);
+ 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_9BIT);
+ *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 resolution;
+ 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 ret;
+
+ if (chan->subtype == LPG_SUBTYPE_HI_RES_PWM) {
+ refclk = lpg_clk_rates_hi_res[FIELD_GET(PWM_CLK_SELECT_HI_RES_MASK, val)];
+ resolution = lpg_pwm_resolution_hi_res[FIELD_GET(PWM_SIZE_HI_RES_MASK, val)];
+ } else {
+ refclk = lpg_clk_rates[FIELD_GET(PWM_CLK_SELECT_MASK, val)];
+ resolution = 9;
+ }
+
+ if (refclk) {
+ ret = regmap_read(lpg->map, chan->base + LPG_PREDIV_CLK_REG, &val);
+ if (ret)
+ return ret;
+
+ 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 ret;
+
+ state->period = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC * (1 << 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 ret;
+
+ 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.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_9BIT - 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 },
+ },
+};
+
+/* PMI632 uses SDAM instead of LUT for pattern */
+static const struct lpg_data pmi632_lpg_data = {
+ .triled_base = 0xd000,
+
+ .num_channels = 5,
+ .channels = (const struct lpg_channel_data[]) {
+ { .base = 0xb300, .triled_mask = BIT(7) },
+ { .base = 0xb400, .triled_mask = BIT(6) },
+ { .base = 0xb500, .triled_mask = BIT(5) },
+ { .base = 0xb600 },
+ { .base = 0xb700 },
+ },
+};
+
+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 lpg_data pmk8550_pwm_data = {
+ .num_channels = 2,
+ .channels = (const struct lpg_channel_data[]) {
+ { .base = 0xe800 },
+ { .base = 0xe900 },
+ },
+};
+
+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,pmi632-lpg", .data = &pmi632_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 },
+ { .compatible = "qcom,pmk8550-pwm", .data = &pmk8550_pwm_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");