Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

56 files changed, 22935 insertions, 0 deletions

diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
new file mode 100644
index 000000000..8acf277b8
--- /dev/null
+++ b/drivers/iio/accel/Kconfig
@@ -0,0 +1,458 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Accelerometer drivers
+#
+# When adding new entries keep the list in alphabetical order
+
+menu "Accelerometers"
+
+config ADIS16201
+	tristate "Analog Devices ADIS16201 Dual-Axis Digital Inclinometer and Accelerometer"
+	depends on SPI
+	select IIO_ADIS_LIB
+	select IIO_ADIS_LIB_BUFFER if IIO_BUFFER
+	help
+	  Say Y here to build support for Analog Devices adis16201 dual-axis
+	  digital inclinometer and accelerometer.
+
+	  To compile this driver as a module, say M here: the module will
+	  be called adis16201.
+
+config ADIS16209
+	tristate "Analog Devices ADIS16209 Dual-Axis Digital Inclinometer and Accelerometer"
+	depends on SPI
+	select IIO_ADIS_LIB
+	select IIO_ADIS_LIB_BUFFER if IIO_BUFFER
+	help
+	  Say Y here to build support for Analog Devices adis16209 dual-axis digital inclinometer
+	  and accelerometer.
+
+	  To compile this driver as a module, say M here: the module will be
+	  called adis16209.
+
+config ADXL345
+	tristate
+
+config ADXL345_I2C
+	tristate "Analog Devices ADXL345 3-Axis Digital Accelerometer I2C Driver"
+	depends on INPUT_ADXL34X=n
+	depends on I2C
+	select ADXL345
+	select REGMAP_I2C
+	help
+	  Say Y here if you want to build support for the Analog Devices
+	  ADXL345 or ADXL375 3-axis digital accelerometer.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called adxl345_i2c and you will also get adxl345_core
+	  for the core module.
+
+config ADXL345_SPI
+	tristate "Analog Devices ADXL345 3-Axis Digital Accelerometer SPI Driver"
+	depends on INPUT_ADXL34X=n
+	depends on SPI
+	select ADXL345
+	select REGMAP_SPI
+	help
+	  Say Y here if you want to build support for the Analog Devices
+	  ADXL345 or ADXL375 3-axis digital accelerometer.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called adxl345_spi and you will also get adxl345_core
+	  for the core module.
+
+config ADXL372
+	tristate
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+
+config ADXL372_SPI
+	tristate "Analog Devices ADXL372 3-Axis Accelerometer SPI Driver"
+	depends on SPI
+	select ADXL372
+	select REGMAP_SPI
+	help
+	  Say yes here to add support for the Analog Devices ADXL372 triaxial
+	  acceleration sensor.
+	  To compile this driver as a module, choose M here: the
+	  module will be called adxl372_spi.
+
+config ADXL372_I2C
+	tristate "Analog Devices ADXL372 3-Axis Accelerometer I2C Driver"
+	depends on I2C
+	select ADXL372
+	select REGMAP_I2C
+	help
+	  Say yes here to add support for the Analog Devices ADXL372 triaxial
+	  acceleration sensor.
+	  To compile this driver as a module, choose M here: the
+	  module will be called adxl372_i2c.
+
+config BMA180
+	tristate "Bosch BMA023/BMA1x0/BMA25x 3-Axis Accelerometer Driver"
+	depends on I2C && INPUT_BMA150=n
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	  Say Y here if you want to build a driver for the Bosch BMA023, BMA150
+	  BMA180, SMB380, or BMA25x triaxial acceleration sensor.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called bma180.
+
+config BMA220
+	tristate "Bosch BMA220 3-Axis Accelerometer Driver"
+	depends on SPI
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	  Say yes here to add support for the Bosch BMA220 triaxial
+	  acceleration sensor.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called bma220_spi.
+
+config BMA400
+	tristate "Bosch BMA400 3-Axis Accelerometer Driver"
+	select REGMAP
+	select BMA400_I2C if I2C
+	select BMA400_SPI if SPI
+	help
+	  Say Y here if you want to build a driver for the Bosch BMA400
+	  triaxial acceleration sensor.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called bma400_core and you will also get
+	  bma400_i2c if I2C is enabled and bma400_spi if SPI is
+	  enabled.
+
+config BMA400_I2C
+	tristate
+	depends on BMA400
+
+config BMA400_SPI
+	tristate
+	depends on BMA400
+
+config BMC150_ACCEL
+	tristate "Bosch BMC150 Accelerometer Driver"
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	select REGMAP
+	select BMC150_ACCEL_I2C if I2C
+	select BMC150_ACCEL_SPI if SPI
+	help
+	  Say yes here to build support for the following Bosch accelerometers:
+	  BMC150, BMI055, BMA250E, BMA222E, BMA255, BMA280.
+
+	  This is a combo module with both accelerometer and magnetometer.
+	  This driver is only implementing accelerometer part, which has
+	  its own address and register map.
+
+config BMC150_ACCEL_I2C
+	tristate
+	select REGMAP_I2C
+
+config BMC150_ACCEL_SPI
+	tristate
+	select REGMAP_SPI
+
+config DA280
+	tristate "MiraMEMS DA280 3-axis 14-bit digital accelerometer driver"
+	depends on I2C
+	help
+	  Say yes here to build support for the MiraMEMS DA280 3-axis 14-bit
+	  digital accelerometer.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called da280.
+
+config DA311
+	tristate "MiraMEMS DA311 3-axis 12-bit digital accelerometer driver"
+	depends on I2C
+	help
+	  Say yes here to build support for the MiraMEMS DA311 3-axis 12-bit
+	  digital accelerometer.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called da311.
+
+config DMARD06
+	tristate "Domintech DMARD06 Digital Accelerometer Driver"
+	depends on OF || COMPILE_TEST
+	depends on I2C
+	help
+	  Say yes here to build support for the Domintech low-g tri-axial
+	  digital accelerometers: DMARD05, DMARD06, DMARD07.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called dmard06.
+
+config DMARD09
+	tristate "Domintech DMARD09 3-axis Accelerometer Driver"
+	depends on I2C
+	help
+	  Say yes here to get support for the Domintech DMARD09 3-axis
+	  accelerometer.
+
+	  Choosing M will build the driver as a module. If so, the module
+	  will be called dmard09.
+
+config DMARD10
+	tristate "Domintech DMARD10 3-axis Accelerometer Driver"
+	depends on I2C
+	help
+	  Say yes here to get support for the Domintech DMARD10 3-axis
+	  accelerometer.
+
+	  Choosing M will build the driver as a module. If so, the module
+	  will be called dmard10.
+
+config HID_SENSOR_ACCEL_3D
+	depends on HID_SENSOR_HUB
+	select IIO_BUFFER
+	select HID_SENSOR_IIO_COMMON
+	select HID_SENSOR_IIO_TRIGGER
+	tristate "HID Accelerometers 3D"
+	help
+	  Say yes here to build support for the HID SENSOR
+	  accelerometers 3D.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called hid-sensor-accel-3d.
+
+config IIO_CROS_EC_ACCEL_LEGACY
+	tristate "ChromeOS EC Legacy Accelerometer Sensor"
+	depends on IIO_CROS_EC_SENSORS_CORE
+	help
+	  Say yes here to get support for accelerometers on Chromebook using
+	  legacy EC firmware.
+	  Sensor data is retrieved through IO memory.
+	  Newer devices should use IIO_CROS_EC_SENSORS.
+
+config IIO_ST_ACCEL_3AXIS
+	tristate "STMicroelectronics accelerometers 3-Axis Driver"
+	depends on (I2C || SPI_MASTER) && SYSFS
+	depends on !SENSORS_LIS3_I2C
+	depends on !SENSORS_LIS3_SPI
+	select IIO_ST_SENSORS_CORE
+	select IIO_ST_ACCEL_I2C_3AXIS if (I2C)
+	select IIO_ST_ACCEL_SPI_3AXIS if (SPI_MASTER)
+	select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
+	help
+	  Say yes here to build support for STMicroelectronics accelerometers:
+	  LSM303DLH, LSM303DLHC, LIS3DH, LSM330D, LSM330DL, LSM330DLC,
+	  LIS331DLH, LSM303DL, LSM303DLM, LSM330, LIS2DH12, H3LIS331DL,
+	  LNG2DM, LIS3DE, LIS2DE12, LIS2HH12
+
+	  This driver can also be built as a module. If so, these modules
+	  will be created:
+	  - st_accel (core functions for the driver [it is mandatory]);
+	  - st_accel_i2c (necessary for the I2C devices [optional*]);
+	  - st_accel_spi (necessary for the SPI devices [optional*]);
+
+	  (*) one of these is necessary to do something.
+
+config IIO_ST_ACCEL_I2C_3AXIS
+	tristate
+	depends on IIO_ST_ACCEL_3AXIS
+	depends on IIO_ST_SENSORS_I2C
+
+config IIO_ST_ACCEL_SPI_3AXIS
+	tristate
+	depends on IIO_ST_ACCEL_3AXIS
+	depends on IIO_ST_SENSORS_SPI
+
+config KXSD9
+	tristate "Kionix KXSD9 Accelerometer Driver"
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	  Say yes here to build support for the Kionix KXSD9 accelerometer.
+	  It can be accessed using an (optional) SPI or I2C interface.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called kxsd9.
+
+config KXSD9_SPI
+	tristate "Kionix KXSD9 SPI transport"
+	depends on KXSD9
+	depends on SPI
+	default KXSD9
+	select REGMAP_SPI
+	help
+	  Say yes here to enable the Kionix KXSD9 accelerometer
+	  SPI transport channel.
+
+config KXSD9_I2C
+	tristate "Kionix KXSD9 I2C transport"
+	depends on KXSD9
+	depends on I2C
+	default KXSD9
+	select REGMAP_I2C
+	help
+	  Say yes here to enable the Kionix KXSD9 accelerometer
+	  I2C transport channel.
+
+config KXCJK1013
+	tristate "Kionix 3-Axis Accelerometer Driver"
+	depends on I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	  Say Y here if you want to build a driver for the Kionix KXCJK-1013
+	  triaxial acceleration sensor. This driver also supports KXCJ9-1008,
+	  KXTJ2-1009 and KXTF9.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called kxcjk-1013.
+
+config MC3230
+	tristate "mCube MC3230 Digital Accelerometer Driver"
+	depends on I2C
+	help
+	  Say yes here to build support for the mCube MC3230 low-g tri-axial
+	  digital accelerometer.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mc3230.
+
+config MMA7455
+	tristate
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+
+config MMA7455_I2C
+	tristate "Freescale MMA7455L/MMA7456L Accelerometer I2C Driver"
+	depends on I2C
+	select MMA7455
+	select REGMAP_I2C
+	help
+	  Say yes here to build support for the Freescale MMA7455L and
+	  MMA7456L 3-axis accelerometer.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called mma7455_i2c.
+
+config MMA7455_SPI
+	tristate "Freescale MMA7455L/MMA7456L Accelerometer SPI Driver"
+	depends on SPI_MASTER
+	select MMA7455
+	select REGMAP_SPI
+	help
+	  Say yes here to build support for the Freescale MMA7455L and
+	  MMA7456L 3-axis accelerometer.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called mma7455_spi.
+
+config MMA7660
+	tristate "Freescale MMA7660FC 3-Axis Accelerometer Driver"
+	depends on I2C
+	help
+	  Say yes here to get support for the Freescale MMA7660FC 3-Axis
+	  accelerometer.
+
+	  Choosing M will build the driver as a module. If so, the module
+	  will be called mma7660.
+
+config MMA8452
+	tristate "Freescale / NXP MMA8452Q and similar Accelerometers Driver"
+	depends on I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	  Say yes here to build support for the following Freescale / NXP 3-axis
+	  accelerometers: MMA8451Q, MMA8452Q, MMA8453Q, MMA8652FC, MMA8653FC,
+	  FXLS8471Q.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called mma8452.
+
+config MMA9551_CORE
+	tristate
+
+config MMA9551
+	tristate "Freescale MMA9551L Intelligent Motion-Sensing Platform Driver"
+	depends on I2C
+	select MMA9551_CORE
+
+	help
+	  Say yes here to build support for the Freescale MMA9551L
+	  Intelligent Motion-Sensing Platform Driver.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called mma9551.
+
+config MMA9553
+	tristate "Freescale MMA9553L Intelligent Pedometer Platform Driver"
+	depends on I2C
+	select MMA9551_CORE
+	help
+	  Say yes here to build support for the Freescale MMA9553L
+	  Intelligent Pedometer Platform Driver.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called mma9553.
+
+config MXC4005
+	tristate "Memsic MXC4005XC 3-Axis Accelerometer Driver"
+	depends on I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	select REGMAP_I2C
+	help
+	  Say yes here to build support for the Memsic MXC4005XC 3-axis
+	  accelerometer.
+
+	  To compile this driver as a module, choose M. The module will be
+	  called mxc4005.
+
+config MXC6255
+	tristate "Memsic MXC6255 Orientation Sensing Accelerometer Driver"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  Say yes here to build support for the Memsic MXC6255 Orientation
+	  Sensing Accelerometer Driver.
+
+	  To compile this driver as a module, choose M here: the module will be
+	  called mxc6255.
+
+config SCA3000
+	select IIO_BUFFER
+	select IIO_KFIFO_BUF
+	depends on SPI
+	tristate "VTI SCA3000 series accelerometers"
+	help
+	  Say Y here to build support for the VTI SCA3000 series of SPI
+	  accelerometers. These devices use a hardware ring buffer.
+
+	  To compile this driver as a module, say M here: the module will be
+	  called sca3000.
+
+config STK8312
+	tristate "Sensortek STK8312 3-Axis Accelerometer Driver"
+	depends on I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	  Say yes here to get support for the Sensortek STK8312 3-axis
+	  accelerometer.
+
+	  Choosing M will build the driver as a module. If so, the module
+	  will be called stk8312.
+
+config STK8BA50
+	tristate "Sensortek STK8BA50 3-Axis Accelerometer Driver"
+	depends on I2C
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	help
+	  Say yes here to get support for the Sensortek STK8BA50 3-axis
+	  accelerometer.
+
+	  Choosing M will build the driver as a module. If so, the module
+	  will be called stk8ba50.
+
+endmenu
diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
new file mode 100644
index 000000000..4f6c1ebe1
--- /dev/null
+++ b/drivers/iio/accel/Makefile
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for industrial I/O accelerometer drivers
+#
+
+# When adding new entries keep the list in alphabetical order
+obj-$(CONFIG_ADIS16201) += adis16201.o
+obj-$(CONFIG_ADIS16209) += adis16209.o
+obj-$(CONFIG_ADXL345) += adxl345_core.o
+obj-$(CONFIG_ADXL345_I2C) += adxl345_i2c.o
+obj-$(CONFIG_ADXL345_SPI) += adxl345_spi.o
+obj-$(CONFIG_ADXL372) += adxl372.o
+obj-$(CONFIG_ADXL372_I2C) += adxl372_i2c.o
+obj-$(CONFIG_ADXL372_SPI) += adxl372_spi.o
+obj-$(CONFIG_BMA180) += bma180.o
+obj-$(CONFIG_BMA220) += bma220_spi.o
+obj-$(CONFIG_BMA400) += bma400_core.o
+obj-$(CONFIG_BMA400_I2C) += bma400_i2c.o
+obj-$(CONFIG_BMA400_SPI) += bma400_spi.o
+obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o
+obj-$(CONFIG_BMC150_ACCEL_I2C) += bmc150-accel-i2c.o
+obj-$(CONFIG_BMC150_ACCEL_SPI) += bmc150-accel-spi.o
+obj-$(CONFIG_DA280)	+= da280.o
+obj-$(CONFIG_DA311)	+= da311.o
+obj-$(CONFIG_DMARD06)	+= dmard06.o
+obj-$(CONFIG_DMARD09)	+= dmard09.o
+obj-$(CONFIG_DMARD10)	+= dmard10.o
+obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o
+obj-$(CONFIG_KXCJK1013) += kxcjk-1013.o
+obj-$(CONFIG_KXSD9)	+= kxsd9.o
+obj-$(CONFIG_KXSD9_SPI)	+= kxsd9-spi.o
+obj-$(CONFIG_KXSD9_I2C)	+= kxsd9-i2c.o
+obj-$(CONFIG_MC3230)	+= mc3230.o
+
+obj-$(CONFIG_MMA7455)		+= mma7455_core.o
+obj-$(CONFIG_MMA7455_I2C)	+= mma7455_i2c.o
+obj-$(CONFIG_MMA7455_SPI)	+= mma7455_spi.o
+
+obj-$(CONFIG_MMA7660)	+= mma7660.o
+
+obj-$(CONFIG_MMA8452)	+= mma8452.o
+
+obj-$(CONFIG_MMA9551_CORE)	+= mma9551_core.o
+obj-$(CONFIG_MMA9551)		+= mma9551.o
+obj-$(CONFIG_MMA9553)		+= mma9553.o
+
+obj-$(CONFIG_MXC4005)		+= mxc4005.o
+obj-$(CONFIG_MXC6255)		+= mxc6255.o
+
+obj-$(CONFIG_SCA3000)		+= sca3000.o
+
+obj-$(CONFIG_STK8312)		+= stk8312.o
+obj-$(CONFIG_STK8BA50)		+= stk8ba50.o
+
+obj-$(CONFIG_IIO_CROS_EC_ACCEL_LEGACY) += cros_ec_accel_legacy.o
+
+obj-$(CONFIG_IIO_SSP_SENSORS_COMMONS) += ssp_accel_sensor.o
+
+obj-$(CONFIG_IIO_ST_ACCEL_3AXIS) += st_accel.o
+st_accel-y := st_accel_core.o
+st_accel-$(CONFIG_IIO_BUFFER) += st_accel_buffer.o
+
+obj-$(CONFIG_IIO_ST_ACCEL_I2C_3AXIS) += st_accel_i2c.o
+obj-$(CONFIG_IIO_ST_ACCEL_SPI_3AXIS) += st_accel_spi.o
diff --git a/drivers/iio/accel/adis16201.c b/drivers/iio/accel/adis16201.c
new file mode 100644
index 000000000..b4ae4f86d
--- /dev/null
+++ b/drivers/iio/accel/adis16201.c
@@ -0,0 +1,307 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ADIS16201 Dual-Axis Digital Inclinometer and Accelerometer
+ *
+ * Copyright 2010 Analog Devices Inc.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/sysfs.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/imu/adis.h>
+
+#define ADIS16201_STARTUP_DELAY_MS			220
+#define ADIS16201_FLASH_CNT				0x00
+
+/* Data Output Register Information */
+#define ADIS16201_SUPPLY_OUT_REG			0x02
+#define ADIS16201_XACCL_OUT_REG				0x04
+#define ADIS16201_YACCL_OUT_REG				0x06
+#define ADIS16201_AUX_ADC_REG				0x08
+#define ADIS16201_TEMP_OUT_REG				0x0A
+#define ADIS16201_XINCL_OUT_REG				0x0C
+#define ADIS16201_YINCL_OUT_REG				0x0E
+
+/* Calibration Register Definition */
+#define ADIS16201_XACCL_OFFS_REG			0x10
+#define ADIS16201_YACCL_OFFS_REG			0x12
+#define ADIS16201_XACCL_SCALE_REG			0x14
+#define ADIS16201_YACCL_SCALE_REG			0x16
+#define ADIS16201_XINCL_OFFS_REG			0x18
+#define ADIS16201_YINCL_OFFS_REG			0x1A
+#define ADIS16201_XINCL_SCALE_REG			0x1C
+#define ADIS16201_YINCL_SCALE_REG			0x1E
+
+/* Alarm Register Definition */
+#define ADIS16201_ALM_MAG1_REG				0x20
+#define ADIS16201_ALM_MAG2_REG				0x22
+#define ADIS16201_ALM_SMPL1_REG				0x24
+#define ADIS16201_ALM_SMPL2_REG				0x26
+#define ADIS16201_ALM_CTRL_REG				0x28
+
+#define ADIS16201_AUX_DAC_REG				0x30
+#define ADIS16201_GPIO_CTRL_REG				0x32
+#define ADIS16201_SMPL_PRD_REG				0x36
+/* Operation, filter configuration */
+#define ADIS16201_AVG_CNT_REG				0x38
+#define ADIS16201_SLP_CNT_REG				0x3A
+
+/* Miscellaneous Control Register Definition */
+#define ADIS16201_MSC_CTRL_REG				0x34
+#define  ADIS16201_MSC_CTRL_SELF_TEST_EN		BIT(8)
+/* Data-ready enable: 1 = enabled, 0 = disabled */
+#define  ADIS16201_MSC_CTRL_DATA_RDY_EN			BIT(2)
+/* Data-ready polarity: 1 = active high, 0 = active low */
+#define  ADIS16201_MSC_CTRL_ACTIVE_DATA_RDY_HIGH	BIT(1)
+/* Data-ready line selection: 1 = DIO1, 0 = DIO0 */
+#define  ADIS16201_MSC_CTRL_DATA_RDY_DIO1		BIT(0)
+
+/* Diagnostics System Status Register Definition */
+#define ADIS16201_DIAG_STAT_REG				0x3C
+#define  ADIS16201_DIAG_STAT_ALARM2			BIT(9)
+#define  ADIS16201_DIAG_STAT_ALARM1			BIT(8)
+#define  ADIS16201_DIAG_STAT_SPI_FAIL_BIT		3
+#define  ADIS16201_DIAG_STAT_FLASH_UPT_FAIL_BIT		2
+/* Power supply above 3.625 V */
+#define  ADIS16201_DIAG_STAT_POWER_HIGH_BIT		1
+/* Power supply below 2.975 V */
+#define  ADIS16201_DIAG_STAT_POWER_LOW_BIT		0
+
+/* System Command Register Definition */
+#define ADIS16201_GLOB_CMD_REG				0x3E
+#define  ADIS16201_GLOB_CMD_SW_RESET			BIT(7)
+#define  ADIS16201_GLOB_CMD_FACTORY_RESET		BIT(1)
+
+#define ADIS16201_ERROR_ACTIVE				BIT(14)
+
+enum adis16201_scan {
+	ADIS16201_SCAN_ACC_X,
+	ADIS16201_SCAN_ACC_Y,
+	ADIS16201_SCAN_INCLI_X,
+	ADIS16201_SCAN_INCLI_Y,
+	ADIS16201_SCAN_SUPPLY,
+	ADIS16201_SCAN_AUX_ADC,
+	ADIS16201_SCAN_TEMP,
+};
+
+static const u8 adis16201_addresses[] = {
+	[ADIS16201_SCAN_ACC_X] = ADIS16201_XACCL_OFFS_REG,
+	[ADIS16201_SCAN_ACC_Y] = ADIS16201_YACCL_OFFS_REG,
+	[ADIS16201_SCAN_INCLI_X] = ADIS16201_XINCL_OFFS_REG,
+	[ADIS16201_SCAN_INCLI_Y] = ADIS16201_YINCL_OFFS_REG,
+};
+
+static int adis16201_read_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,
+			      int *val, int *val2,
+			      long mask)
+{
+	struct adis *st = iio_priv(indio_dev);
+	int ret;
+	int bits;
+	u8 addr;
+	s16 val16;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		return adis_single_conversion(indio_dev, chan,
+					      ADIS16201_ERROR_ACTIVE, val);
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_VOLTAGE:
+			if (chan->channel == 0) {
+			/* Voltage base units are mV hence 1.22 mV */
+				*val = 1;
+				*val2 = 220000;
+			} else {
+			/* Voltage base units are mV hence 0.61 mV */
+				*val = 0;
+				*val2 = 610000;
+			}
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_TEMP:
+			*val = -470;
+			*val2 = 0;
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_ACCEL:
+			/*
+			 * IIO base unit for sensitivity of accelerometer
+			 * is milli g.
+			 * 1 LSB represents 0.244 mg.
+			 */
+			*val = 0;
+			*val2 = IIO_G_TO_M_S_2(462400);
+			return IIO_VAL_INT_PLUS_NANO;
+		case IIO_INCLI:
+			*val = 0;
+			*val2 = 100000;
+			return IIO_VAL_INT_PLUS_MICRO;
+		default:
+			return -EINVAL;
+		}
+		break;
+	case IIO_CHAN_INFO_OFFSET:
+		/*
+		 * The raw ADC value is 1278 when the temperature
+		 * is 25 degrees and the scale factor per milli
+		 * degree celcius is -470.
+		 */
+		*val = 25000 / -470 - 1278;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_CALIBBIAS:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			bits = 12;
+			break;
+		case IIO_INCLI:
+			bits = 9;
+			break;
+		default:
+			return -EINVAL;
+		}
+		addr = adis16201_addresses[chan->scan_index];
+		ret = adis_read_reg_16(st, addr, &val16);
+		if (ret)
+			return ret;
+
+		*val = sign_extend32(val16, bits - 1);
+		return IIO_VAL_INT;
+	}
+
+	return -EINVAL;
+}
+
+static int adis16201_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val,
+			       int val2,
+			       long mask)
+{
+	struct adis *st = iio_priv(indio_dev);
+	int m;
+
+	if (mask != IIO_CHAN_INFO_CALIBBIAS)
+		return -EINVAL;
+
+	switch (chan->type) {
+	case IIO_ACCEL:
+		m = GENMASK(11, 0);
+		break;
+	case IIO_INCLI:
+		m = GENMASK(8, 0);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return adis_write_reg_16(st, adis16201_addresses[chan->scan_index],
+				 val & m);
+}
+
+static const struct iio_chan_spec adis16201_channels[] = {
+	ADIS_SUPPLY_CHAN(ADIS16201_SUPPLY_OUT_REG, ADIS16201_SCAN_SUPPLY, 0,
+			 12),
+	ADIS_TEMP_CHAN(ADIS16201_TEMP_OUT_REG, ADIS16201_SCAN_TEMP, 0, 12),
+	ADIS_ACCEL_CHAN(X, ADIS16201_XACCL_OUT_REG, ADIS16201_SCAN_ACC_X,
+			BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
+	ADIS_ACCEL_CHAN(Y, ADIS16201_YACCL_OUT_REG, ADIS16201_SCAN_ACC_Y,
+			BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
+	ADIS_AUX_ADC_CHAN(ADIS16201_AUX_ADC_REG, ADIS16201_SCAN_AUX_ADC, 0, 12),
+	ADIS_INCLI_CHAN(X, ADIS16201_XINCL_OUT_REG, ADIS16201_SCAN_INCLI_X,
+			BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
+	ADIS_INCLI_CHAN(Y, ADIS16201_YINCL_OUT_REG, ADIS16201_SCAN_INCLI_Y,
+			BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
+	IIO_CHAN_SOFT_TIMESTAMP(7)
+};
+
+static const struct iio_info adis16201_info = {
+	.read_raw = adis16201_read_raw,
+	.write_raw = adis16201_write_raw,
+	.update_scan_mode = adis_update_scan_mode,
+};
+
+static const char * const adis16201_status_error_msgs[] = {
+	[ADIS16201_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
+	[ADIS16201_DIAG_STAT_FLASH_UPT_FAIL_BIT] = "Flash update failed",
+	[ADIS16201_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
+	[ADIS16201_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.975V",
+};
+
+static const struct adis_timeout adis16201_timeouts = {
+	.reset_ms = ADIS16201_STARTUP_DELAY_MS,
+	.sw_reset_ms = ADIS16201_STARTUP_DELAY_MS,
+	.self_test_ms = ADIS16201_STARTUP_DELAY_MS,
+};
+
+static const struct adis_data adis16201_data = {
+	.read_delay = 20,
+	.msc_ctrl_reg = ADIS16201_MSC_CTRL_REG,
+	.glob_cmd_reg = ADIS16201_GLOB_CMD_REG,
+	.diag_stat_reg = ADIS16201_DIAG_STAT_REG,
+
+	.self_test_mask = ADIS16201_MSC_CTRL_SELF_TEST_EN,
+	.self_test_reg = ADIS16201_MSC_CTRL_REG,
+	.self_test_no_autoclear = true,
+	.timeouts = &adis16201_timeouts,
+
+	.status_error_msgs = adis16201_status_error_msgs,
+	.status_error_mask = BIT(ADIS16201_DIAG_STAT_SPI_FAIL_BIT) |
+		BIT(ADIS16201_DIAG_STAT_FLASH_UPT_FAIL_BIT) |
+		BIT(ADIS16201_DIAG_STAT_POWER_HIGH_BIT) |
+		BIT(ADIS16201_DIAG_STAT_POWER_LOW_BIT),
+};
+
+static int adis16201_probe(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev;
+	struct adis *st;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
+
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->info = &adis16201_info;
+
+	indio_dev->channels = adis16201_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adis16201_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	ret = adis_init(st, indio_dev, spi, &adis16201_data);
+	if (ret)
+		return ret;
+
+	ret = devm_adis_setup_buffer_and_trigger(st, indio_dev, NULL);
+	if (ret)
+		return ret;
+
+	ret = adis_initial_startup(st);
+	if (ret)
+		return ret;
+
+	return devm_iio_device_register(&spi->dev, indio_dev);
+}
+
+static struct spi_driver adis16201_driver = {
+	.driver = {
+		.name = "adis16201",
+	},
+	.probe = adis16201_probe,
+};
+module_spi_driver(adis16201_driver);
+
+MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
+MODULE_DESCRIPTION("Analog Devices ADIS16201 Dual-Axis Digital Inclinometer and Accelerometer");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:adis16201");
+MODULE_IMPORT_NS(IIO_ADISLIB);
diff --git a/drivers/iio/accel/adis16209.c b/drivers/iio/accel/adis16209.c
new file mode 100644
index 000000000..e6e465f39
--- /dev/null
+++ b/drivers/iio/accel/adis16209.c
@@ -0,0 +1,317 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ADIS16209 Dual-Axis Digital Inclinometer and Accelerometer
+ *
+ * Copyright 2010 Analog Devices Inc.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/imu/adis.h>
+
+#define ADIS16209_STARTUP_DELAY_MS	220
+#define ADIS16209_FLASH_CNT_REG		0x00
+
+/* Data Output Register Definitions */
+#define ADIS16209_SUPPLY_OUT_REG	0x02
+#define ADIS16209_XACCL_OUT_REG		0x04
+#define ADIS16209_YACCL_OUT_REG		0x06
+/* Output, auxiliary ADC input */
+#define ADIS16209_AUX_ADC_REG		0x08
+/* Output, temperature */
+#define ADIS16209_TEMP_OUT_REG		0x0A
+/* Output, +/- 90 degrees X-axis inclination */
+#define ADIS16209_XINCL_OUT_REG		0x0C
+#define ADIS16209_YINCL_OUT_REG		0x0E
+/* Output, +/-180 vertical rotational position */
+#define ADIS16209_ROT_OUT_REG		0x10
+
+/*
+ * Calibration Register Definitions.
+ * Acceleration, inclination or rotation offset null.
+ */
+#define ADIS16209_XACCL_NULL_REG	0x12
+#define ADIS16209_YACCL_NULL_REG	0x14
+#define ADIS16209_XINCL_NULL_REG	0x16
+#define ADIS16209_YINCL_NULL_REG	0x18
+#define ADIS16209_ROT_NULL_REG		0x1A
+
+/* Alarm Register Definitions */
+#define ADIS16209_ALM_MAG1_REG		0x20
+#define ADIS16209_ALM_MAG2_REG		0x22
+#define ADIS16209_ALM_SMPL1_REG		0x24
+#define ADIS16209_ALM_SMPL2_REG		0x26
+#define ADIS16209_ALM_CTRL_REG		0x28
+
+#define ADIS16209_AUX_DAC_REG		0x30
+#define ADIS16209_GPIO_CTRL_REG		0x32
+#define ADIS16209_SMPL_PRD_REG		0x36
+#define ADIS16209_AVG_CNT_REG		0x38
+#define ADIS16209_SLP_CNT_REG		0x3A
+
+#define ADIS16209_MSC_CTRL_REG			0x34
+#define  ADIS16209_MSC_CTRL_PWRUP_SELF_TEST	BIT(10)
+#define  ADIS16209_MSC_CTRL_SELF_TEST_EN	BIT(8)
+#define  ADIS16209_MSC_CTRL_DATA_RDY_EN		BIT(2)
+/* Data-ready polarity: 1 = active high, 0 = active low */
+#define  ADIS16209_MSC_CTRL_ACTIVE_HIGH		BIT(1)
+#define  ADIS16209_MSC_CTRL_DATA_RDY_DIO2	BIT(0)
+
+#define ADIS16209_STAT_REG			0x3C
+#define  ADIS16209_STAT_ALARM2			BIT(9)
+#define  ADIS16209_STAT_ALARM1			BIT(8)
+#define  ADIS16209_STAT_SELFTEST_FAIL_BIT	5
+#define  ADIS16209_STAT_SPI_FAIL_BIT		3
+#define  ADIS16209_STAT_FLASH_UPT_FAIL_BIT	2
+/* Power supply above 3.625 V */
+#define  ADIS16209_STAT_POWER_HIGH_BIT		1
+/* Power supply below 2.975 V */
+#define  ADIS16209_STAT_POWER_LOW_BIT		0
+
+#define ADIS16209_CMD_REG			0x3E
+#define  ADIS16209_CMD_SW_RESET			BIT(7)
+#define  ADIS16209_CMD_CLEAR_STAT		BIT(4)
+#define  ADIS16209_CMD_FACTORY_CAL		BIT(1)
+
+#define ADIS16209_ERROR_ACTIVE			BIT(14)
+
+enum adis16209_scan {
+	ADIS16209_SCAN_SUPPLY,
+	ADIS16209_SCAN_ACC_X,
+	ADIS16209_SCAN_ACC_Y,
+	ADIS16209_SCAN_AUX_ADC,
+	ADIS16209_SCAN_TEMP,
+	ADIS16209_SCAN_INCLI_X,
+	ADIS16209_SCAN_INCLI_Y,
+	ADIS16209_SCAN_ROT,
+};
+
+static const u8 adis16209_addresses[8][1] = {
+	[ADIS16209_SCAN_SUPPLY] = { },
+	[ADIS16209_SCAN_AUX_ADC] = { },
+	[ADIS16209_SCAN_ACC_X] = { ADIS16209_XACCL_NULL_REG },
+	[ADIS16209_SCAN_ACC_Y] = { ADIS16209_YACCL_NULL_REG },
+	[ADIS16209_SCAN_INCLI_X] = { ADIS16209_XINCL_NULL_REG },
+	[ADIS16209_SCAN_INCLI_Y] = { ADIS16209_YINCL_NULL_REG },
+	[ADIS16209_SCAN_ROT] = { },
+	[ADIS16209_SCAN_TEMP] = { },
+};
+
+static int adis16209_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val,
+			       int val2,
+			       long mask)
+{
+	struct adis *st = iio_priv(indio_dev);
+	int m;
+
+	if (mask != IIO_CHAN_INFO_CALIBBIAS)
+		return -EINVAL;
+
+	switch (chan->type) {
+	case IIO_ACCEL:
+	case IIO_INCLI:
+		m = GENMASK(13, 0);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return adis_write_reg_16(st, adis16209_addresses[chan->scan_index][0],
+				 val & m);
+}
+
+static int adis16209_read_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,
+			      int *val, int *val2,
+			      long mask)
+{
+	struct adis *st = iio_priv(indio_dev);
+	int ret;
+	int bits;
+	u8 addr;
+	s16 val16;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		return adis_single_conversion(indio_dev, chan,
+			ADIS16209_ERROR_ACTIVE, val);
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_VOLTAGE:
+			*val = 0;
+			switch (chan->channel) {
+			case 0:
+				*val2 = 305180; /* 0.30518 mV */
+				break;
+			case 1:
+				*val2 = 610500; /* 0.6105 mV */
+				break;
+			default:
+				return -EINVAL;
+			}
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_TEMP:
+			*val = -470;
+			*val2 = 0;
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_ACCEL:
+			/*
+			 * IIO base unit for sensitivity of accelerometer
+			 * is milli g.
+			 * 1 LSB represents 0.244 mg.
+			 */
+			*val = 0;
+			*val2 = IIO_G_TO_M_S_2(244140);
+			return IIO_VAL_INT_PLUS_NANO;
+		case IIO_INCLI:
+		case IIO_ROT:
+			/*
+			 * IIO base units for rotation are degrees.
+			 * 1 LSB represents 0.025 milli degrees.
+			 */
+			*val = 0;
+			*val2 = 25000;
+			return IIO_VAL_INT_PLUS_MICRO;
+		default:
+			return -EINVAL;
+		}
+		break;
+	case IIO_CHAN_INFO_OFFSET:
+		/*
+		 * The raw ADC value is 0x4FE when the temperature
+		 * is 45 degrees and the scale factor per milli
+		 * degree celcius is -470.
+		 */
+		*val = 25000 / -470 - 0x4FE;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_CALIBBIAS:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			bits = 14;
+			break;
+		default:
+			return -EINVAL;
+		}
+		addr = adis16209_addresses[chan->scan_index][0];
+		ret = adis_read_reg_16(st, addr, &val16);
+		if (ret)
+			return ret;
+
+		*val = sign_extend32(val16, bits - 1);
+		return IIO_VAL_INT;
+	}
+	return -EINVAL;
+}
+
+static const struct iio_chan_spec adis16209_channels[] = {
+	ADIS_SUPPLY_CHAN(ADIS16209_SUPPLY_OUT_REG, ADIS16209_SCAN_SUPPLY,
+			 0, 14),
+	ADIS_TEMP_CHAN(ADIS16209_TEMP_OUT_REG, ADIS16209_SCAN_TEMP, 0, 12),
+	ADIS_ACCEL_CHAN(X, ADIS16209_XACCL_OUT_REG, ADIS16209_SCAN_ACC_X,
+			BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
+	ADIS_ACCEL_CHAN(Y, ADIS16209_YACCL_OUT_REG, ADIS16209_SCAN_ACC_Y,
+			BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
+	ADIS_AUX_ADC_CHAN(ADIS16209_AUX_ADC_REG, ADIS16209_SCAN_AUX_ADC, 0, 12),
+	ADIS_INCLI_CHAN(X, ADIS16209_XINCL_OUT_REG, ADIS16209_SCAN_INCLI_X,
+			0, 0, 14),
+	ADIS_INCLI_CHAN(Y, ADIS16209_YINCL_OUT_REG, ADIS16209_SCAN_INCLI_Y,
+			0, 0, 14),
+	ADIS_ROT_CHAN(X, ADIS16209_ROT_OUT_REG, ADIS16209_SCAN_ROT, 0, 0, 14),
+	IIO_CHAN_SOFT_TIMESTAMP(8)
+};
+
+static const struct iio_info adis16209_info = {
+	.read_raw = adis16209_read_raw,
+	.write_raw = adis16209_write_raw,
+	.update_scan_mode = adis_update_scan_mode,
+};
+
+static const char * const adis16209_status_error_msgs[] = {
+	[ADIS16209_STAT_SELFTEST_FAIL_BIT] = "Self test failure",
+	[ADIS16209_STAT_SPI_FAIL_BIT] = "SPI failure",
+	[ADIS16209_STAT_FLASH_UPT_FAIL_BIT] = "Flash update failed",
+	[ADIS16209_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
+	[ADIS16209_STAT_POWER_LOW_BIT] = "Power supply below 2.975V",
+};
+
+static const struct adis_timeout adis16209_timeouts = {
+	.reset_ms = ADIS16209_STARTUP_DELAY_MS,
+	.self_test_ms = ADIS16209_STARTUP_DELAY_MS,
+	.sw_reset_ms = ADIS16209_STARTUP_DELAY_MS,
+};
+
+static const struct adis_data adis16209_data = {
+	.read_delay = 30,
+	.msc_ctrl_reg = ADIS16209_MSC_CTRL_REG,
+	.glob_cmd_reg = ADIS16209_CMD_REG,
+	.diag_stat_reg = ADIS16209_STAT_REG,
+
+	.self_test_mask = ADIS16209_MSC_CTRL_SELF_TEST_EN,
+	.self_test_reg = ADIS16209_MSC_CTRL_REG,
+	.self_test_no_autoclear = true,
+	.timeouts = &adis16209_timeouts,
+
+	.status_error_msgs = adis16209_status_error_msgs,
+	.status_error_mask = BIT(ADIS16209_STAT_SELFTEST_FAIL_BIT) |
+		BIT(ADIS16209_STAT_SPI_FAIL_BIT) |
+		BIT(ADIS16209_STAT_FLASH_UPT_FAIL_BIT) |
+		BIT(ADIS16209_STAT_POWER_HIGH_BIT) |
+		BIT(ADIS16209_STAT_POWER_LOW_BIT),
+};
+
+static int adis16209_probe(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev;
+	struct adis *st;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
+
+	indio_dev->name = spi->dev.driver->name;
+	indio_dev->info = &adis16209_info;
+	indio_dev->channels = adis16209_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adis16209_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	ret = adis_init(st, indio_dev, spi, &adis16209_data);
+	if (ret)
+		return ret;
+
+	ret = devm_adis_setup_buffer_and_trigger(st, indio_dev, NULL);
+	if (ret)
+		return ret;
+
+	ret = adis_initial_startup(st);
+	if (ret)
+		return ret;
+
+	return devm_iio_device_register(&spi->dev, indio_dev);
+}
+
+static struct spi_driver adis16209_driver = {
+	.driver = {
+		.name = "adis16209",
+	},
+	.probe = adis16209_probe,
+};
+module_spi_driver(adis16209_driver);
+
+MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
+MODULE_DESCRIPTION("Analog Devices ADIS16209 Dual-Axis Digital Inclinometer and Accelerometer");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:adis16209");
+MODULE_IMPORT_NS(IIO_ADISLIB);
diff --git a/drivers/iio/accel/adxl345.h b/drivers/iio/accel/adxl345.h
new file mode 100644
index 000000000..384497776
--- /dev/null
+++ b/drivers/iio/accel/adxl345.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * ADXL345 3-Axis Digital Accelerometer
+ *
+ * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
+ */
+
+#ifndef _ADXL345_H_
+#define _ADXL345_H_
+
+enum adxl345_device_type {
+	ADXL345,
+	ADXL375,
+};
+
+int adxl345_core_probe(struct device *dev, struct regmap *regmap,
+		       enum adxl345_device_type type, const char *name);
+int adxl345_core_remove(struct device *dev);
+
+#endif /* _ADXL345_H_ */
diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c
new file mode 100644
index 000000000..312866530
--- /dev/null
+++ b/drivers/iio/accel/adxl345_core.c
@@ -0,0 +1,288 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADXL345 3-Axis Digital Accelerometer IIO core driver
+ *
+ * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
+ *
+ * Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL345.pdf
+ */
+
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#include "adxl345.h"
+
+#define ADXL345_REG_DEVID		0x00
+#define ADXL345_REG_OFSX		0x1e
+#define ADXL345_REG_OFSY		0x1f
+#define ADXL345_REG_OFSZ		0x20
+#define ADXL345_REG_OFS_AXIS(index)	(ADXL345_REG_OFSX + (index))
+#define ADXL345_REG_BW_RATE		0x2C
+#define ADXL345_REG_POWER_CTL		0x2D
+#define ADXL345_REG_DATA_FORMAT		0x31
+#define ADXL345_REG_DATAX0		0x32
+#define ADXL345_REG_DATAY0		0x34
+#define ADXL345_REG_DATAZ0		0x36
+#define ADXL345_REG_DATA_AXIS(index)	\
+	(ADXL345_REG_DATAX0 + (index) * sizeof(__le16))
+
+#define ADXL345_BW_RATE			GENMASK(3, 0)
+#define ADXL345_BASE_RATE_NANO_HZ	97656250LL
+#define NHZ_PER_HZ			1000000000LL
+
+#define ADXL345_POWER_CTL_MEASURE	BIT(3)
+#define ADXL345_POWER_CTL_STANDBY	0x00
+
+#define ADXL345_DATA_FORMAT_FULL_RES	BIT(3) /* Up to 13-bits resolution */
+#define ADXL345_DATA_FORMAT_2G		0
+#define ADXL345_DATA_FORMAT_4G		1
+#define ADXL345_DATA_FORMAT_8G		2
+#define ADXL345_DATA_FORMAT_16G		3
+
+#define ADXL345_DEVID			0xE5
+
+/*
+ * In full-resolution mode, scale factor is maintained at ~4 mg/LSB
+ * in all g ranges.
+ *
+ * At +/- 16g with 13-bit resolution, scale is computed as:
+ * (16 + 16) * 9.81 / (2^13 - 1) = 0.0383
+ */
+static const int adxl345_uscale = 38300;
+
+/*
+ * The Datasheet lists a resolution of Resolution is ~49 mg per LSB. That's
+ * ~480mm/s**2 per LSB.
+ */
+static const int adxl375_uscale = 480000;
+
+struct adxl345_data {
+	struct regmap *regmap;
+	u8 data_range;
+	enum adxl345_device_type type;
+};
+
+#define ADXL345_CHANNEL(index, axis) {					\
+	.type = IIO_ACCEL,						\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##axis,					\
+	.address = index,						\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
+		BIT(IIO_CHAN_INFO_CALIBBIAS),				\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
+		BIT(IIO_CHAN_INFO_SAMP_FREQ),				\
+}
+
+static const struct iio_chan_spec adxl345_channels[] = {
+	ADXL345_CHANNEL(0, X),
+	ADXL345_CHANNEL(1, Y),
+	ADXL345_CHANNEL(2, Z),
+};
+
+static int adxl345_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct adxl345_data *data = iio_priv(indio_dev);
+	__le16 accel;
+	long long samp_freq_nhz;
+	unsigned int regval;
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		/*
+		 * Data is stored in adjacent registers:
+		 * ADXL345_REG_DATA(X0/Y0/Z0) contain the least significant byte
+		 * and ADXL345_REG_DATA(X0/Y0/Z0) + 1 the most significant byte
+		 */
+		ret = regmap_bulk_read(data->regmap,
+				       ADXL345_REG_DATA_AXIS(chan->address),
+				       &accel, sizeof(accel));
+		if (ret < 0)
+			return ret;
+
+		*val = sign_extend32(le16_to_cpu(accel), 12);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		switch (data->type) {
+		case ADXL345:
+			*val2 = adxl345_uscale;
+			break;
+		case ADXL375:
+			*val2 = adxl375_uscale;
+			break;
+		}
+
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_CALIBBIAS:
+		ret = regmap_read(data->regmap,
+				  ADXL345_REG_OFS_AXIS(chan->address), &regval);
+		if (ret < 0)
+			return ret;
+		/*
+		 * 8-bit resolution at +/- 2g, that is 4x accel data scale
+		 * factor
+		 */
+		*val = sign_extend32(regval, 7) * 4;
+
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		ret = regmap_read(data->regmap, ADXL345_REG_BW_RATE, &regval);
+		if (ret < 0)
+			return ret;
+
+		samp_freq_nhz = ADXL345_BASE_RATE_NANO_HZ <<
+				(regval & ADXL345_BW_RATE);
+		*val = div_s64_rem(samp_freq_nhz, NHZ_PER_HZ, val2);
+
+		return IIO_VAL_INT_PLUS_NANO;
+	}
+
+	return -EINVAL;
+}
+
+static int adxl345_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	struct adxl345_data *data = iio_priv(indio_dev);
+	s64 n;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_CALIBBIAS:
+		/*
+		 * 8-bit resolution at +/- 2g, that is 4x accel data scale
+		 * factor
+		 */
+		return regmap_write(data->regmap,
+				    ADXL345_REG_OFS_AXIS(chan->address),
+				    val / 4);
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		n = div_s64(val * NHZ_PER_HZ + val2, ADXL345_BASE_RATE_NANO_HZ);
+
+		return regmap_update_bits(data->regmap, ADXL345_REG_BW_RATE,
+					  ADXL345_BW_RATE,
+					  clamp_val(ilog2(n), 0,
+						    ADXL345_BW_RATE));
+	}
+
+	return -EINVAL;
+}
+
+static int adxl345_write_raw_get_fmt(struct iio_dev *indio_dev,
+				     struct iio_chan_spec const *chan,
+				     long mask)
+{
+	switch (mask) {
+	case IIO_CHAN_INFO_CALIBBIAS:
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		return IIO_VAL_INT_PLUS_NANO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
+"0.09765625 0.1953125 0.390625 0.78125 1.5625 3.125 6.25 12.5 25 50 100 200 400 800 1600 3200"
+);
+
+static struct attribute *adxl345_attrs[] = {
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group adxl345_attrs_group = {
+	.attrs = adxl345_attrs,
+};
+
+static const struct iio_info adxl345_info = {
+	.attrs		= &adxl345_attrs_group,
+	.read_raw	= adxl345_read_raw,
+	.write_raw	= adxl345_write_raw,
+	.write_raw_get_fmt	= adxl345_write_raw_get_fmt,
+};
+
+int adxl345_core_probe(struct device *dev, struct regmap *regmap,
+		       enum adxl345_device_type type, const char *name)
+{
+	struct adxl345_data *data;
+	struct iio_dev *indio_dev;
+	u32 regval;
+	int ret;
+
+	ret = regmap_read(regmap, ADXL345_REG_DEVID, &regval);
+	if (ret < 0) {
+		dev_err(dev, "Error reading device ID: %d\n", ret);
+		return ret;
+	}
+
+	if (regval != ADXL345_DEVID) {
+		dev_err(dev, "Invalid device ID: %x, expected %x\n",
+			regval, ADXL345_DEVID);
+		return -ENODEV;
+	}
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	dev_set_drvdata(dev, indio_dev);
+	data->regmap = regmap;
+	data->type = type;
+	/* Enable full-resolution mode */
+	data->data_range = ADXL345_DATA_FORMAT_FULL_RES;
+
+	ret = regmap_write(data->regmap, ADXL345_REG_DATA_FORMAT,
+			   data->data_range);
+	if (ret < 0) {
+		dev_err(dev, "Failed to set data range: %d\n", ret);
+		return ret;
+	}
+
+	indio_dev->name = name;
+	indio_dev->info = &adxl345_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = adxl345_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adxl345_channels);
+
+	/* Enable measurement mode */
+	ret = regmap_write(data->regmap, ADXL345_REG_POWER_CTL,
+			   ADXL345_POWER_CTL_MEASURE);
+	if (ret < 0) {
+		dev_err(dev, "Failed to enable measurement mode: %d\n", ret);
+		return ret;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(dev, "iio_device_register failed: %d\n", ret);
+		regmap_write(data->regmap, ADXL345_REG_POWER_CTL,
+			     ADXL345_POWER_CTL_STANDBY);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(adxl345_core_probe);
+
+int adxl345_core_remove(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct adxl345_data *data = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	return regmap_write(data->regmap, ADXL345_REG_POWER_CTL,
+			    ADXL345_POWER_CTL_STANDBY);
+}
+EXPORT_SYMBOL_GPL(adxl345_core_remove);
+
+MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
+MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer core driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/adxl345_i2c.c b/drivers/iio/accel/adxl345_i2c.c
new file mode 100644
index 000000000..1561364ae
--- /dev/null
+++ b/drivers/iio/accel/adxl345_i2c.c
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADXL345 3-Axis Digital Accelerometer I2C driver
+ *
+ * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
+ *
+ * 7-bit I2C slave address: 0x1D (ALT ADDRESS pin tied to VDDIO) or
+ * 0x53 (ALT ADDRESS pin grounded)
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "adxl345.h"
+
+static const struct regmap_config adxl345_i2c_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int adxl345_i2c_probe(struct i2c_client *client,
+			     const struct i2c_device_id *id)
+{
+	struct regmap *regmap;
+
+	if (!id)
+		return -ENODEV;
+
+	regmap = devm_regmap_init_i2c(client, &adxl345_i2c_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(&client->dev, "Error initializing i2c regmap: %ld\n",
+			PTR_ERR(regmap));
+		return PTR_ERR(regmap);
+	}
+
+	return adxl345_core_probe(&client->dev, regmap, id->driver_data,
+				  id->name);
+}
+
+static int adxl345_i2c_remove(struct i2c_client *client)
+{
+	return adxl345_core_remove(&client->dev);
+}
+
+static const struct i2c_device_id adxl345_i2c_id[] = {
+	{ "adxl345", ADXL345 },
+	{ "adxl375", ADXL375 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(i2c, adxl345_i2c_id);
+
+static const struct of_device_id adxl345_of_match[] = {
+	{ .compatible = "adi,adxl345" },
+	{ .compatible = "adi,adxl375" },
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, adxl345_of_match);
+
+static struct i2c_driver adxl345_i2c_driver = {
+	.driver = {
+		.name	= "adxl345_i2c",
+		.of_match_table = adxl345_of_match,
+	},
+	.probe		= adxl345_i2c_probe,
+	.remove		= adxl345_i2c_remove,
+	.id_table	= adxl345_i2c_id,
+};
+
+module_i2c_driver(adxl345_i2c_driver);
+
+MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
+MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer I2C driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/adxl345_spi.c b/drivers/iio/accel/adxl345_spi.c
new file mode 100644
index 000000000..da4591c7e
--- /dev/null
+++ b/drivers/iio/accel/adxl345_spi.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADXL345 3-Axis Digital Accelerometer SPI driver
+ *
+ * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include "adxl345.h"
+
+#define ADXL345_MAX_SPI_FREQ_HZ		5000000
+
+static const struct regmap_config adxl345_spi_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	 /* Setting bits 7 and 6 enables multiple-byte read */
+	.read_flag_mask = BIT(7) | BIT(6),
+};
+
+static int adxl345_spi_probe(struct spi_device *spi)
+{
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	struct regmap *regmap;
+
+	/* Bail out if max_speed_hz exceeds 5 MHz */
+	if (spi->max_speed_hz > ADXL345_MAX_SPI_FREQ_HZ) {
+		dev_err(&spi->dev, "SPI CLK, %d Hz exceeds 5 MHz\n",
+			spi->max_speed_hz);
+		return -EINVAL;
+	}
+
+	regmap = devm_regmap_init_spi(spi, &adxl345_spi_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",
+			PTR_ERR(regmap));
+		return PTR_ERR(regmap);
+	}
+
+	return adxl345_core_probe(&spi->dev, regmap, id->driver_data, id->name);
+}
+
+static int adxl345_spi_remove(struct spi_device *spi)
+{
+	return adxl345_core_remove(&spi->dev);
+}
+
+static const struct spi_device_id adxl345_spi_id[] = {
+	{ "adxl345", ADXL345 },
+	{ "adxl375", ADXL375 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(spi, adxl345_spi_id);
+
+static const struct of_device_id adxl345_of_match[] = {
+	{ .compatible = "adi,adxl345" },
+	{ .compatible = "adi,adxl375" },
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, adxl345_of_match);
+
+static struct spi_driver adxl345_spi_driver = {
+	.driver = {
+		.name	= "adxl345_spi",
+		.of_match_table = adxl345_of_match,
+	},
+	.probe		= adxl345_spi_probe,
+	.remove		= adxl345_spi_remove,
+	.id_table	= adxl345_spi_id,
+};
+
+module_spi_driver(adxl345_spi_driver);
+
+MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
+MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer SPI driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c
new file mode 100644
index 000000000..aed2a4930
--- /dev/null
+++ b/drivers/iio/accel/adxl372.c
@@ -0,0 +1,1269 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ADXL372 3-Axis Digital Accelerometer core driver
+ *
+ * Copyright 2018 Analog Devices Inc.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/events.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#include "adxl372.h"
+
+/* ADXL372 registers definition */
+#define ADXL372_DEVID			0x00
+#define ADXL372_DEVID_MST		0x01
+#define ADXL372_PARTID			0x02
+#define ADXL372_STATUS_1		0x04
+#define ADXL372_STATUS_2		0x05
+#define ADXL372_FIFO_ENTRIES_2		0x06
+#define ADXL372_FIFO_ENTRIES_1		0x07
+#define ADXL372_X_DATA_H		0x08
+#define ADXL372_X_DATA_L		0x09
+#define ADXL372_Y_DATA_H		0x0A
+#define ADXL372_Y_DATA_L		0x0B
+#define ADXL372_Z_DATA_H		0x0C
+#define ADXL372_Z_DATA_L		0x0D
+#define ADXL372_X_MAXPEAK_H		0x15
+#define ADXL372_X_MAXPEAK_L		0x16
+#define ADXL372_Y_MAXPEAK_H		0x17
+#define ADXL372_Y_MAXPEAK_L		0x18
+#define ADXL372_Z_MAXPEAK_H		0x19
+#define ADXL372_Z_MAXPEAK_L		0x1A
+#define ADXL372_OFFSET_X		0x20
+#define ADXL372_OFFSET_Y		0x21
+#define ADXL372_OFFSET_Z		0x22
+#define ADXL372_X_THRESH_ACT_H		0x23
+#define ADXL372_X_THRESH_ACT_L		0x24
+#define ADXL372_Y_THRESH_ACT_H		0x25
+#define ADXL372_Y_THRESH_ACT_L		0x26
+#define ADXL372_Z_THRESH_ACT_H		0x27
+#define ADXL372_Z_THRESH_ACT_L		0x28
+#define ADXL372_TIME_ACT		0x29
+#define ADXL372_X_THRESH_INACT_H	0x2A
+#define ADXL372_X_THRESH_INACT_L	0x2B
+#define ADXL372_Y_THRESH_INACT_H	0x2C
+#define ADXL372_Y_THRESH_INACT_L	0x2D
+#define ADXL372_Z_THRESH_INACT_H	0x2E
+#define ADXL372_Z_THRESH_INACT_L	0x2F
+#define ADXL372_TIME_INACT_H		0x30
+#define ADXL372_TIME_INACT_L		0x31
+#define ADXL372_X_THRESH_ACT2_H		0x32
+#define ADXL372_X_THRESH_ACT2_L		0x33
+#define ADXL372_Y_THRESH_ACT2_H		0x34
+#define ADXL372_Y_THRESH_ACT2_L		0x35
+#define ADXL372_Z_THRESH_ACT2_H		0x36
+#define ADXL372_Z_THRESH_ACT2_L		0x37
+#define ADXL372_HPF			0x38
+#define ADXL372_FIFO_SAMPLES		0x39
+#define ADXL372_FIFO_CTL		0x3A
+#define ADXL372_INT1_MAP		0x3B
+#define ADXL372_INT2_MAP		0x3C
+#define ADXL372_TIMING			0x3D
+#define ADXL372_MEASURE			0x3E
+#define ADXL372_POWER_CTL		0x3F
+#define ADXL372_SELF_TEST		0x40
+#define ADXL372_RESET			0x41
+#define ADXL372_FIFO_DATA		0x42
+
+#define ADXL372_DEVID_VAL		0xAD
+#define ADXL372_PARTID_VAL		0xFA
+#define ADXL372_RESET_CODE		0x52
+
+/* ADXL372_POWER_CTL */
+#define ADXL372_POWER_CTL_MODE_MSK		GENMASK_ULL(1, 0)
+#define ADXL372_POWER_CTL_MODE(x)		(((x) & 0x3) << 0)
+
+/* ADXL372_MEASURE */
+#define ADXL372_MEASURE_LINKLOOP_MSK		GENMASK_ULL(5, 4)
+#define ADXL372_MEASURE_LINKLOOP_MODE(x)	(((x) & 0x3) << 4)
+#define ADXL372_MEASURE_BANDWIDTH_MSK		GENMASK_ULL(2, 0)
+#define ADXL372_MEASURE_BANDWIDTH_MODE(x)	(((x) & 0x7) << 0)
+
+/* ADXL372_TIMING */
+#define ADXL372_TIMING_ODR_MSK			GENMASK_ULL(7, 5)
+#define ADXL372_TIMING_ODR_MODE(x)		(((x) & 0x7) << 5)
+
+/* ADXL372_FIFO_CTL */
+#define ADXL372_FIFO_CTL_FORMAT_MSK		GENMASK(5, 3)
+#define ADXL372_FIFO_CTL_FORMAT_MODE(x)		(((x) & 0x7) << 3)
+#define ADXL372_FIFO_CTL_MODE_MSK		GENMASK(2, 1)
+#define ADXL372_FIFO_CTL_MODE_MODE(x)		(((x) & 0x3) << 1)
+#define ADXL372_FIFO_CTL_SAMPLES_MSK		BIT(1)
+#define ADXL372_FIFO_CTL_SAMPLES_MODE(x)	(((x) > 0xFF) ? 1 : 0)
+
+/* ADXL372_STATUS_1 */
+#define ADXL372_STATUS_1_DATA_RDY(x)		(((x) >> 0) & 0x1)
+#define ADXL372_STATUS_1_FIFO_RDY(x)		(((x) >> 1) & 0x1)
+#define ADXL372_STATUS_1_FIFO_FULL(x)		(((x) >> 2) & 0x1)
+#define ADXL372_STATUS_1_FIFO_OVR(x)		(((x) >> 3) & 0x1)
+#define ADXL372_STATUS_1_USR_NVM_BUSY(x)	(((x) >> 5) & 0x1)
+#define ADXL372_STATUS_1_AWAKE(x)		(((x) >> 6) & 0x1)
+#define ADXL372_STATUS_1_ERR_USR_REGS(x)	(((x) >> 7) & 0x1)
+
+/* ADXL372_STATUS_2 */
+#define ADXL372_STATUS_2_INACT(x)		(((x) >> 4) & 0x1)
+#define ADXL372_STATUS_2_ACT(x)			(((x) >> 5) & 0x1)
+#define ADXL372_STATUS_2_AC2(x)			(((x) >> 6) & 0x1)
+
+/* ADXL372_INT1_MAP */
+#define ADXL372_INT1_MAP_DATA_RDY_MSK		BIT(0)
+#define ADXL372_INT1_MAP_DATA_RDY_MODE(x)	(((x) & 0x1) << 0)
+#define ADXL372_INT1_MAP_FIFO_RDY_MSK		BIT(1)
+#define ADXL372_INT1_MAP_FIFO_RDY_MODE(x)	(((x) & 0x1) << 1)
+#define ADXL372_INT1_MAP_FIFO_FULL_MSK		BIT(2)
+#define ADXL372_INT1_MAP_FIFO_FULL_MODE(x)	(((x) & 0x1) << 2)
+#define ADXL372_INT1_MAP_FIFO_OVR_MSK		BIT(3)
+#define ADXL372_INT1_MAP_FIFO_OVR_MODE(x)	(((x) & 0x1) << 3)
+#define ADXL372_INT1_MAP_INACT_MSK		BIT(4)
+#define ADXL372_INT1_MAP_INACT_MODE(x)		(((x) & 0x1) << 4)
+#define ADXL372_INT1_MAP_ACT_MSK		BIT(5)
+#define ADXL372_INT1_MAP_ACT_MODE(x)		(((x) & 0x1) << 5)
+#define ADXL372_INT1_MAP_AWAKE_MSK		BIT(6)
+#define ADXL372_INT1_MAP_AWAKE_MODE(x)		(((x) & 0x1) << 6)
+#define ADXL372_INT1_MAP_LOW_MSK		BIT(7)
+#define ADXL372_INT1_MAP_LOW_MODE(x)		(((x) & 0x1) << 7)
+
+/* ADX372_THRESH */
+#define ADXL372_THRESH_VAL_H_MSK	GENMASK(10, 3)
+#define ADXL372_THRESH_VAL_H_SEL(x)	FIELD_GET(ADXL372_THRESH_VAL_H_MSK, x)
+#define ADXL372_THRESH_VAL_L_MSK	GENMASK(2, 0)
+#define ADXL372_THRESH_VAL_L_SEL(x)	FIELD_GET(ADXL372_THRESH_VAL_L_MSK, x)
+
+/* The ADXL372 includes a deep, 512 sample FIFO buffer */
+#define ADXL372_FIFO_SIZE			512
+#define ADXL372_X_AXIS_EN(x)			((x) & BIT(0))
+#define ADXL372_Y_AXIS_EN(x)			((x) & BIT(1))
+#define ADXL372_Z_AXIS_EN(x)			((x) & BIT(2))
+
+/*
+ * At +/- 200g with 12-bit resolution, scale is computed as:
+ * (200 + 200) * 9.81 / (2^12 - 1) = 0.958241
+ */
+#define ADXL372_USCALE	958241
+
+enum adxl372_op_mode {
+	ADXL372_STANDBY,
+	ADXL372_WAKE_UP,
+	ADXL372_INSTANT_ON,
+	ADXL372_FULL_BW_MEASUREMENT,
+};
+
+enum adxl372_act_proc_mode {
+	ADXL372_DEFAULT,
+	ADXL372_LINKED,
+	ADXL372_LOOPED,
+};
+
+enum adxl372_th_activity {
+	ADXL372_ACTIVITY,
+	ADXL372_ACTIVITY2,
+	ADXL372_INACTIVITY,
+};
+
+enum adxl372_odr {
+	ADXL372_ODR_400HZ,
+	ADXL372_ODR_800HZ,
+	ADXL372_ODR_1600HZ,
+	ADXL372_ODR_3200HZ,
+	ADXL372_ODR_6400HZ,
+};
+
+enum adxl372_bandwidth {
+	ADXL372_BW_200HZ,
+	ADXL372_BW_400HZ,
+	ADXL372_BW_800HZ,
+	ADXL372_BW_1600HZ,
+	ADXL372_BW_3200HZ,
+};
+
+static const unsigned int adxl372_th_reg_high_addr[3] = {
+	[ADXL372_ACTIVITY] = ADXL372_X_THRESH_ACT_H,
+	[ADXL372_ACTIVITY2] = ADXL372_X_THRESH_ACT2_H,
+	[ADXL372_INACTIVITY] = ADXL372_X_THRESH_INACT_H,
+};
+
+enum adxl372_fifo_format {
+	ADXL372_XYZ_FIFO,
+	ADXL372_X_FIFO,
+	ADXL372_Y_FIFO,
+	ADXL372_XY_FIFO,
+	ADXL372_Z_FIFO,
+	ADXL372_XZ_FIFO,
+	ADXL372_YZ_FIFO,
+	ADXL372_XYZ_PEAK_FIFO,
+};
+
+enum adxl372_fifo_mode {
+	ADXL372_FIFO_BYPASSED,
+	ADXL372_FIFO_STREAMED,
+	ADXL372_FIFO_TRIGGERED,
+	ADXL372_FIFO_OLD_SAVED
+};
+
+static const int adxl372_samp_freq_tbl[5] = {
+	400, 800, 1600, 3200, 6400,
+};
+
+static const int adxl372_bw_freq_tbl[5] = {
+	200, 400, 800, 1600, 3200,
+};
+
+struct adxl372_axis_lookup {
+	unsigned int bits;
+	enum adxl372_fifo_format fifo_format;
+};
+
+static const struct adxl372_axis_lookup adxl372_axis_lookup_table[] = {
+	{ BIT(0), ADXL372_X_FIFO },
+	{ BIT(1), ADXL372_Y_FIFO },
+	{ BIT(2), ADXL372_Z_FIFO },
+	{ BIT(0) | BIT(1), ADXL372_XY_FIFO },
+	{ BIT(0) | BIT(2), ADXL372_XZ_FIFO },
+	{ BIT(1) | BIT(2), ADXL372_YZ_FIFO },
+	{ BIT(0) | BIT(1) | BIT(2), ADXL372_XYZ_FIFO },
+};
+
+static const struct iio_event_spec adxl372_events[] = {
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_RISING,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE),
+		.mask_shared_by_all = BIT(IIO_EV_INFO_PERIOD) | BIT(IIO_EV_INFO_ENABLE),
+	}, {
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_FALLING,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE),
+		.mask_shared_by_all = BIT(IIO_EV_INFO_PERIOD) | BIT(IIO_EV_INFO_ENABLE),
+	},
+};
+
+#define ADXL372_ACCEL_CHANNEL(index, reg, axis) {			\
+	.type = IIO_ACCEL,						\
+	.address = reg,							\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
+				    BIT(IIO_CHAN_INFO_SAMP_FREQ) |	\
+		BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),	\
+	.scan_index = index,						\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 12,						\
+		.storagebits = 16,					\
+		.shift = 4,						\
+		.endianness = IIO_BE,					\
+	},								\
+	.event_spec = adxl372_events,					\
+	.num_event_specs = ARRAY_SIZE(adxl372_events)			\
+}
+
+static const struct iio_chan_spec adxl372_channels[] = {
+	ADXL372_ACCEL_CHANNEL(0, ADXL372_X_DATA_H, X),
+	ADXL372_ACCEL_CHANNEL(1, ADXL372_Y_DATA_H, Y),
+	ADXL372_ACCEL_CHANNEL(2, ADXL372_Z_DATA_H, Z),
+};
+
+struct adxl372_state {
+	int				irq;
+	struct device			*dev;
+	struct regmap			*regmap;
+	struct iio_trigger		*dready_trig;
+	struct iio_trigger		*peak_datardy_trig;
+	enum adxl372_fifo_mode		fifo_mode;
+	enum adxl372_fifo_format	fifo_format;
+	unsigned int			fifo_axis_mask;
+	enum adxl372_op_mode		op_mode;
+	enum adxl372_act_proc_mode	act_proc_mode;
+	enum adxl372_odr		odr;
+	enum adxl372_bandwidth		bw;
+	u32				act_time_ms;
+	u32				inact_time_ms;
+	u8				fifo_set_size;
+	unsigned long			int1_bitmask;
+	unsigned long			int2_bitmask;
+	u16				watermark;
+	__be16				fifo_buf[ADXL372_FIFO_SIZE];
+	bool				peak_fifo_mode_en;
+	struct mutex			threshold_m; /* lock for threshold */
+};
+
+static const unsigned long adxl372_channel_masks[] = {
+	BIT(0), BIT(1), BIT(2),
+	BIT(0) | BIT(1),
+	BIT(0) | BIT(2),
+	BIT(1) | BIT(2),
+	BIT(0) | BIT(1) | BIT(2),
+	0
+};
+
+static ssize_t adxl372_read_threshold_value(struct iio_dev *indio_dev, unsigned int addr,
+					    u16 *threshold)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+	__be16 raw_regval;
+	u16 regval;
+	int ret;
+
+	ret = regmap_bulk_read(st->regmap, addr, &raw_regval, sizeof(raw_regval));
+	if (ret < 0)
+		return ret;
+
+	regval = be16_to_cpu(raw_regval);
+	regval >>= 5;
+
+	*threshold = regval;
+
+	return 0;
+}
+
+static ssize_t adxl372_write_threshold_value(struct iio_dev *indio_dev, unsigned int addr,
+					     u16 threshold)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&st->threshold_m);
+	ret = regmap_write(st->regmap, addr, ADXL372_THRESH_VAL_H_SEL(threshold));
+	if (ret < 0)
+		goto unlock;
+
+	ret = regmap_update_bits(st->regmap, addr + 1, GENMASK(7, 5),
+				 ADXL372_THRESH_VAL_L_SEL(threshold) << 5);
+
+unlock:
+	mutex_unlock(&st->threshold_m);
+
+	return ret;
+}
+
+static int adxl372_read_axis(struct adxl372_state *st, u8 addr)
+{
+	__be16 regval;
+	int ret;
+
+	ret = regmap_bulk_read(st->regmap, addr, &regval, sizeof(regval));
+	if (ret < 0)
+		return ret;
+
+	return be16_to_cpu(regval);
+}
+
+static int adxl372_set_op_mode(struct adxl372_state *st,
+			       enum adxl372_op_mode op_mode)
+{
+	int ret;
+
+	ret = regmap_update_bits(st->regmap, ADXL372_POWER_CTL,
+				 ADXL372_POWER_CTL_MODE_MSK,
+				 ADXL372_POWER_CTL_MODE(op_mode));
+	if (ret < 0)
+		return ret;
+
+	st->op_mode = op_mode;
+
+	return ret;
+}
+
+static int adxl372_set_odr(struct adxl372_state *st,
+			   enum adxl372_odr odr)
+{
+	int ret;
+
+	ret = regmap_update_bits(st->regmap, ADXL372_TIMING,
+				 ADXL372_TIMING_ODR_MSK,
+				 ADXL372_TIMING_ODR_MODE(odr));
+	if (ret < 0)
+		return ret;
+
+	st->odr = odr;
+
+	return ret;
+}
+
+static int adxl372_find_closest_match(const int *array,
+				      unsigned int size, int val)
+{
+	int i;
+
+	for (i = 0; i < size; i++) {
+		if (val <= array[i])
+			return i;
+	}
+
+	return size - 1;
+}
+
+static int adxl372_set_bandwidth(struct adxl372_state *st,
+				 enum adxl372_bandwidth bw)
+{
+	int ret;
+
+	ret = regmap_update_bits(st->regmap, ADXL372_MEASURE,
+				 ADXL372_MEASURE_BANDWIDTH_MSK,
+				 ADXL372_MEASURE_BANDWIDTH_MODE(bw));
+	if (ret < 0)
+		return ret;
+
+	st->bw = bw;
+
+	return ret;
+}
+
+static int adxl372_set_act_proc_mode(struct adxl372_state *st,
+				     enum adxl372_act_proc_mode mode)
+{
+	int ret;
+
+	ret = regmap_update_bits(st->regmap,
+				 ADXL372_MEASURE,
+				 ADXL372_MEASURE_LINKLOOP_MSK,
+				 ADXL372_MEASURE_LINKLOOP_MODE(mode));
+	if (ret < 0)
+		return ret;
+
+	st->act_proc_mode = mode;
+
+	return ret;
+}
+
+static int adxl372_set_activity_threshold(struct adxl372_state *st,
+					  enum adxl372_th_activity act,
+					  bool ref_en, bool enable,
+					  unsigned int threshold)
+{
+	unsigned char buf[6];
+	unsigned char th_reg_high_val, th_reg_low_val, th_reg_high_addr;
+
+	/* scale factor is 100 mg/code */
+	th_reg_high_val = (threshold / 100) >> 3;
+	th_reg_low_val = ((threshold / 100) << 5) | (ref_en << 1) | enable;
+	th_reg_high_addr = adxl372_th_reg_high_addr[act];
+
+	buf[0] = th_reg_high_val;
+	buf[1] = th_reg_low_val;
+	buf[2] = th_reg_high_val;
+	buf[3] = th_reg_low_val;
+	buf[4] = th_reg_high_val;
+	buf[5] = th_reg_low_val;
+
+	return regmap_bulk_write(st->regmap, th_reg_high_addr,
+				 buf, ARRAY_SIZE(buf));
+}
+
+static int adxl372_set_activity_time_ms(struct adxl372_state *st,
+					unsigned int act_time_ms)
+{
+	unsigned int reg_val, scale_factor;
+	int ret;
+
+	/*
+	 * 3.3 ms per code is the scale factor of the TIME_ACT register for
+	 * ODR = 6400 Hz. It is 6.6 ms per code for ODR = 3200 Hz and below.
+	 */
+	if (st->odr == ADXL372_ODR_6400HZ)
+		scale_factor = 3300;
+	else
+		scale_factor = 6600;
+
+	reg_val = DIV_ROUND_CLOSEST(act_time_ms * 1000, scale_factor);
+
+	/* TIME_ACT register is 8 bits wide */
+	if (reg_val > 0xFF)
+		reg_val = 0xFF;
+
+	ret = regmap_write(st->regmap, ADXL372_TIME_ACT, reg_val);
+	if (ret < 0)
+		return ret;
+
+	st->act_time_ms = act_time_ms;
+
+	return ret;
+}
+
+static int adxl372_set_inactivity_time_ms(struct adxl372_state *st,
+					  unsigned int inact_time_ms)
+{
+	unsigned int reg_val_h, reg_val_l, res, scale_factor;
+	int ret;
+
+	/*
+	 * 13 ms per code is the scale factor of the TIME_INACT register for
+	 * ODR = 6400 Hz. It is 26 ms per code for ODR = 3200 Hz and below.
+	 */
+	if (st->odr == ADXL372_ODR_6400HZ)
+		scale_factor = 13;
+	else
+		scale_factor = 26;
+
+	res = DIV_ROUND_CLOSEST(inact_time_ms, scale_factor);
+	reg_val_h = (res >> 8) & 0xFF;
+	reg_val_l = res & 0xFF;
+
+	ret = regmap_write(st->regmap, ADXL372_TIME_INACT_H, reg_val_h);
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_write(st->regmap, ADXL372_TIME_INACT_L, reg_val_l);
+	if (ret < 0)
+		return ret;
+
+	st->inact_time_ms = inact_time_ms;
+
+	return ret;
+}
+
+static int adxl372_set_interrupts(struct adxl372_state *st,
+				  unsigned long int1_bitmask,
+				  unsigned long int2_bitmask)
+{
+	int ret;
+
+	ret = regmap_write(st->regmap, ADXL372_INT1_MAP, int1_bitmask);
+	if (ret < 0)
+		return ret;
+
+	return regmap_write(st->regmap, ADXL372_INT2_MAP, int2_bitmask);
+}
+
+static int adxl372_configure_fifo(struct adxl372_state *st)
+{
+	unsigned int fifo_samples, fifo_ctl;
+	int ret;
+
+	/* FIFO must be configured while in standby mode */
+	ret = adxl372_set_op_mode(st, ADXL372_STANDBY);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * watermark stores the number of sets; we need to write the FIFO
+	 * registers with the number of samples
+	 */
+	fifo_samples = (st->watermark * st->fifo_set_size);
+	fifo_ctl = ADXL372_FIFO_CTL_FORMAT_MODE(st->fifo_format) |
+		   ADXL372_FIFO_CTL_MODE_MODE(st->fifo_mode) |
+		   ADXL372_FIFO_CTL_SAMPLES_MODE(fifo_samples);
+
+	ret = regmap_write(st->regmap,
+			   ADXL372_FIFO_SAMPLES, fifo_samples & 0xFF);
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_write(st->regmap, ADXL372_FIFO_CTL, fifo_ctl);
+	if (ret < 0)
+		return ret;
+
+	return adxl372_set_op_mode(st, ADXL372_FULL_BW_MEASUREMENT);
+}
+
+static int adxl372_get_status(struct adxl372_state *st,
+			      u8 *status1, u8 *status2,
+			      u16 *fifo_entries)
+{
+	__be32 buf;
+	u32 val;
+	int ret;
+
+	/* STATUS1, STATUS2, FIFO_ENTRIES2 and FIFO_ENTRIES are adjacent regs */
+	ret = regmap_bulk_read(st->regmap, ADXL372_STATUS_1,
+			       &buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	val = be32_to_cpu(buf);
+
+	*status1 = (val >> 24) & 0x0F;
+	*status2 = (val >> 16) & 0x0F;
+	/*
+	 * FIFO_ENTRIES contains the least significant byte, and FIFO_ENTRIES2
+	 * contains the two most significant bits
+	 */
+	*fifo_entries = val & 0x3FF;
+
+	return ret;
+}
+
+static void adxl372_arrange_axis_data(struct adxl372_state *st, __be16 *sample)
+{
+	__be16	axis_sample[3];
+	int i = 0;
+
+	memset(axis_sample, 0, 3 * sizeof(__be16));
+	if (ADXL372_X_AXIS_EN(st->fifo_axis_mask))
+		axis_sample[i++] = sample[0];
+	if (ADXL372_Y_AXIS_EN(st->fifo_axis_mask))
+		axis_sample[i++] = sample[1];
+	if (ADXL372_Z_AXIS_EN(st->fifo_axis_mask))
+		axis_sample[i++] = sample[2];
+
+	memcpy(sample, axis_sample, 3 * sizeof(__be16));
+}
+
+static void adxl372_push_event(struct iio_dev *indio_dev, s64 timestamp, u8 status2)
+{
+	unsigned int ev_dir = IIO_EV_DIR_NONE;
+
+	if (ADXL372_STATUS_2_ACT(status2))
+		ev_dir = IIO_EV_DIR_RISING;
+
+	if (ADXL372_STATUS_2_INACT(status2))
+		ev_dir = IIO_EV_DIR_FALLING;
+
+	if (ev_dir != IIO_EV_DIR_NONE)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
+						  IIO_EV_TYPE_THRESH, ev_dir),
+			       timestamp);
+}
+
+static irqreturn_t adxl372_trigger_handler(int irq, void  *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct adxl372_state *st = iio_priv(indio_dev);
+	u8 status1, status2;
+	u16 fifo_entries;
+	int i, ret;
+
+	ret = adxl372_get_status(st, &status1, &status2, &fifo_entries);
+	if (ret < 0)
+		goto err;
+
+	adxl372_push_event(indio_dev, iio_get_time_ns(indio_dev), status2);
+
+	if (st->fifo_mode != ADXL372_FIFO_BYPASSED &&
+	    ADXL372_STATUS_1_FIFO_FULL(status1)) {
+		/*
+		 * When reading data from multiple axes from the FIFO,
+		 * to ensure that data is not overwritten and stored out
+		 * of order at least one sample set must be left in the
+		 * FIFO after every read.
+		 */
+		fifo_entries -= st->fifo_set_size;
+
+		/* Read data from the FIFO */
+		ret = regmap_noinc_read(st->regmap, ADXL372_FIFO_DATA,
+					st->fifo_buf,
+					fifo_entries * sizeof(u16));
+		if (ret < 0)
+			goto err;
+
+		/* Each sample is 2 bytes */
+		for (i = 0; i < fifo_entries; i += st->fifo_set_size) {
+			/* filter peak detection data */
+			if (st->peak_fifo_mode_en)
+				adxl372_arrange_axis_data(st, &st->fifo_buf[i]);
+			iio_push_to_buffers(indio_dev, &st->fifo_buf[i]);
+		}
+	}
+err:
+	iio_trigger_notify_done(indio_dev->trig);
+	return IRQ_HANDLED;
+}
+
+static int adxl372_setup(struct adxl372_state *st)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(st->regmap, ADXL372_DEVID, &regval);
+	if (ret < 0)
+		return ret;
+
+	if (regval != ADXL372_DEVID_VAL) {
+		dev_err(st->dev, "Invalid chip id %x\n", regval);
+		return -ENODEV;
+	}
+
+	/*
+	 * Perform a software reset to make sure the device is in a consistent
+	 * state after start up.
+	 */
+	ret = regmap_write(st->regmap, ADXL372_RESET, ADXL372_RESET_CODE);
+	if (ret < 0)
+		return ret;
+
+	ret = adxl372_set_op_mode(st, ADXL372_STANDBY);
+	if (ret < 0)
+		return ret;
+
+	/* Set threshold for activity detection to 1g */
+	ret = adxl372_set_activity_threshold(st, ADXL372_ACTIVITY,
+					     true, true, 1000);
+	if (ret < 0)
+		return ret;
+
+	/* Set threshold for inactivity detection to 100mg */
+	ret = adxl372_set_activity_threshold(st, ADXL372_INACTIVITY,
+					     true, true, 100);
+	if (ret < 0)
+		return ret;
+
+	/* Set activity processing in Looped mode */
+	ret = adxl372_set_act_proc_mode(st, ADXL372_LOOPED);
+	if (ret < 0)
+		return ret;
+
+	ret = adxl372_set_odr(st, ADXL372_ODR_6400HZ);
+	if (ret < 0)
+		return ret;
+
+	ret = adxl372_set_bandwidth(st, ADXL372_BW_3200HZ);
+	if (ret < 0)
+		return ret;
+
+	/* Set activity timer to 1ms */
+	ret = adxl372_set_activity_time_ms(st, 1);
+	if (ret < 0)
+		return ret;
+
+	/* Set inactivity timer to 10s */
+	ret = adxl372_set_inactivity_time_ms(st, 10000);
+	if (ret < 0)
+		return ret;
+
+	/* Set the mode of operation to full bandwidth measurement mode */
+	return adxl372_set_op_mode(st, ADXL372_FULL_BW_MEASUREMENT);
+}
+
+static int adxl372_reg_access(struct iio_dev *indio_dev,
+			      unsigned int reg,
+			      unsigned int writeval,
+			      unsigned int *readval)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	if (readval)
+		return regmap_read(st->regmap, reg, readval);
+	else
+		return regmap_write(st->regmap, reg, writeval);
+}
+
+static int adxl372_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long info)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+	int ret;
+
+	switch (info) {
+	case IIO_CHAN_INFO_RAW:
+		ret = iio_device_claim_direct_mode(indio_dev);
+		if (ret)
+			return ret;
+
+		ret = adxl372_read_axis(st, chan->address);
+		iio_device_release_direct_mode(indio_dev);
+		if (ret < 0)
+			return ret;
+
+		*val = sign_extend32(ret >> chan->scan_type.shift,
+				     chan->scan_type.realbits - 1);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = ADXL372_USCALE;
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		*val = adxl372_samp_freq_tbl[st->odr];
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+		*val = adxl372_bw_freq_tbl[st->bw];
+		return IIO_VAL_INT;
+	}
+
+	return -EINVAL;
+}
+
+static int adxl372_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long info)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+	int odr_index, bw_index, ret;
+
+	switch (info) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		odr_index = adxl372_find_closest_match(adxl372_samp_freq_tbl,
+					ARRAY_SIZE(adxl372_samp_freq_tbl),
+					val);
+		ret = adxl372_set_odr(st, odr_index);
+		if (ret < 0)
+			return ret;
+		/*
+		 * The timer period depends on the ODR selected.
+		 * At 3200 Hz and below, it is 6.6 ms; at 6400 Hz, it is 3.3 ms
+		 */
+		ret = adxl372_set_activity_time_ms(st, st->act_time_ms);
+		if (ret < 0)
+			return ret;
+		/*
+		 * The timer period depends on the ODR selected.
+		 * At 3200 Hz and below, it is 26 ms; at 6400 Hz, it is 13 ms
+		 */
+		ret = adxl372_set_inactivity_time_ms(st, st->inact_time_ms);
+		if (ret < 0)
+			return ret;
+		/*
+		 * The maximum bandwidth is constrained to at most half of
+		 * the ODR to ensure that the Nyquist criteria is not violated
+		 */
+		if (st->bw > odr_index)
+			ret = adxl372_set_bandwidth(st, odr_index);
+
+		return ret;
+	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+		bw_index = adxl372_find_closest_match(adxl372_bw_freq_tbl,
+					ARRAY_SIZE(adxl372_bw_freq_tbl),
+					val);
+		return adxl372_set_bandwidth(st, bw_index);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int adxl372_read_event_value(struct iio_dev *indio_dev, const struct iio_chan_spec *chan,
+				    enum iio_event_type type, enum iio_event_direction dir,
+				    enum iio_event_info info, int *val, int *val2)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+	unsigned int addr;
+	u16 raw_value;
+	int ret;
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		switch (dir) {
+		case IIO_EV_DIR_RISING:
+			addr = ADXL372_X_THRESH_ACT_H + 2 * chan->scan_index;
+			ret = adxl372_read_threshold_value(indio_dev, addr, &raw_value);
+			if (ret < 0)
+				return ret;
+			*val = raw_value * ADXL372_USCALE;
+			*val2 = 1000000;
+			return IIO_VAL_FRACTIONAL;
+		case IIO_EV_DIR_FALLING:
+			addr = ADXL372_X_THRESH_INACT_H + 2 * chan->scan_index;
+			ret =  adxl372_read_threshold_value(indio_dev, addr, &raw_value);
+			if (ret < 0)
+				return ret;
+			*val = raw_value * ADXL372_USCALE;
+			*val2 = 1000000;
+			return IIO_VAL_FRACTIONAL;
+		default:
+			return -EINVAL;
+		}
+	case IIO_EV_INFO_PERIOD:
+		switch (dir) {
+		case IIO_EV_DIR_RISING:
+			*val = st->act_time_ms;
+			*val2 = 1000;
+			return IIO_VAL_FRACTIONAL;
+		case IIO_EV_DIR_FALLING:
+			*val = st->inact_time_ms;
+			*val2 = 1000;
+			return IIO_VAL_FRACTIONAL;
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int adxl372_write_event_value(struct iio_dev *indio_dev, const struct iio_chan_spec *chan,
+				     enum iio_event_type type, enum iio_event_direction dir,
+				     enum iio_event_info info, int val, int val2)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+	unsigned int val_ms;
+	unsigned int addr;
+	u16 raw_val;
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		raw_val = DIV_ROUND_UP(val * 1000000, ADXL372_USCALE);
+		switch (dir) {
+		case IIO_EV_DIR_RISING:
+			addr = ADXL372_X_THRESH_ACT_H + 2 * chan->scan_index;
+			return adxl372_write_threshold_value(indio_dev, addr, raw_val);
+		case IIO_EV_DIR_FALLING:
+			addr = ADXL372_X_THRESH_INACT_H + 2 * chan->scan_index;
+			return adxl372_write_threshold_value(indio_dev, addr, raw_val);
+		default:
+			return -EINVAL;
+		}
+	case IIO_EV_INFO_PERIOD:
+		val_ms = val * 1000 + DIV_ROUND_UP(val2, 1000);
+		switch (dir) {
+		case IIO_EV_DIR_RISING:
+			return adxl372_set_activity_time_ms(st, val_ms);
+		case IIO_EV_DIR_FALLING:
+			return adxl372_set_inactivity_time_ms(st, val_ms);
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int adxl372_read_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan,
+				     enum iio_event_type type, enum iio_event_direction dir)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	switch (dir) {
+	case IIO_EV_DIR_RISING:
+		return FIELD_GET(ADXL372_INT1_MAP_ACT_MSK, st->int1_bitmask);
+	case IIO_EV_DIR_FALLING:
+		return FIELD_GET(ADXL372_INT1_MAP_INACT_MSK, st->int1_bitmask);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int adxl372_write_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan,
+				      enum iio_event_type type, enum iio_event_direction dir,
+				      int state)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	switch (dir) {
+	case IIO_EV_DIR_RISING:
+		set_mask_bits(&st->int1_bitmask, ADXL372_INT1_MAP_ACT_MSK,
+			      ADXL372_INT1_MAP_ACT_MODE(state));
+		break;
+	case IIO_EV_DIR_FALLING:
+		set_mask_bits(&st->int1_bitmask, ADXL372_INT1_MAP_INACT_MSK,
+			      ADXL372_INT1_MAP_INACT_MODE(state));
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return adxl372_set_interrupts(st, st->int1_bitmask, 0);
+}
+
+static ssize_t adxl372_show_filter_freq_avail(struct device *dev,
+					      struct device_attribute *attr,
+					      char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct adxl372_state *st = iio_priv(indio_dev);
+	int i;
+	size_t len = 0;
+
+	for (i = 0; i <= st->odr; i++)
+		len += scnprintf(buf + len, PAGE_SIZE - len,
+				 "%d ", adxl372_bw_freq_tbl[i]);
+
+	buf[len - 1] = '\n';
+
+	return len;
+}
+
+static ssize_t adxl372_get_fifo_enabled(struct device *dev,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	return sprintf(buf, "%d\n", st->fifo_mode);
+}
+
+static ssize_t adxl372_get_fifo_watermark(struct device *dev,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	return sprintf(buf, "%d\n", st->watermark);
+}
+
+static IIO_CONST_ATTR(hwfifo_watermark_min, "1");
+static IIO_CONST_ATTR(hwfifo_watermark_max,
+		      __stringify(ADXL372_FIFO_SIZE));
+static IIO_DEVICE_ATTR(hwfifo_watermark, 0444,
+		       adxl372_get_fifo_watermark, NULL, 0);
+static IIO_DEVICE_ATTR(hwfifo_enabled, 0444,
+		       adxl372_get_fifo_enabled, NULL, 0);
+
+static const struct attribute *adxl372_fifo_attributes[] = {
+	&iio_const_attr_hwfifo_watermark_min.dev_attr.attr,
+	&iio_const_attr_hwfifo_watermark_max.dev_attr.attr,
+	&iio_dev_attr_hwfifo_watermark.dev_attr.attr,
+	&iio_dev_attr_hwfifo_enabled.dev_attr.attr,
+	NULL,
+};
+
+static int adxl372_set_watermark(struct iio_dev *indio_dev, unsigned int val)
+{
+	struct adxl372_state *st  = iio_priv(indio_dev);
+
+	if (val > ADXL372_FIFO_SIZE)
+		val = ADXL372_FIFO_SIZE;
+
+	st->watermark = val;
+
+	return 0;
+}
+
+static int adxl372_buffer_postenable(struct iio_dev *indio_dev)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+	unsigned int mask;
+	int i, ret;
+
+	st->int1_bitmask |= ADXL372_INT1_MAP_FIFO_FULL_MSK;
+	ret = adxl372_set_interrupts(st, st->int1_bitmask, 0);
+	if (ret < 0)
+		return ret;
+
+	mask = *indio_dev->active_scan_mask;
+
+	for (i = 0; i < ARRAY_SIZE(adxl372_axis_lookup_table); i++) {
+		if (mask == adxl372_axis_lookup_table[i].bits)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(adxl372_axis_lookup_table))
+		return -EINVAL;
+
+	st->fifo_format = adxl372_axis_lookup_table[i].fifo_format;
+	st->fifo_axis_mask = adxl372_axis_lookup_table[i].bits;
+	st->fifo_set_size = bitmap_weight(indio_dev->active_scan_mask,
+					  indio_dev->masklength);
+
+	/* Configure the FIFO to store sets of impact event peak. */
+	if (st->peak_fifo_mode_en) {
+		st->fifo_set_size = 3;
+		st->fifo_format = ADXL372_XYZ_PEAK_FIFO;
+	}
+
+	/*
+	 * The 512 FIFO samples can be allotted in several ways, such as:
+	 * 170 sample sets of concurrent 3-axis data
+	 * 256 sample sets of concurrent 2-axis data (user selectable)
+	 * 512 sample sets of single-axis data
+	 * 170 sets of impact event peak (x, y, z)
+	 */
+	if ((st->watermark * st->fifo_set_size) > ADXL372_FIFO_SIZE)
+		st->watermark = (ADXL372_FIFO_SIZE  / st->fifo_set_size);
+
+	st->fifo_mode = ADXL372_FIFO_STREAMED;
+
+	ret = adxl372_configure_fifo(st);
+	if (ret < 0) {
+		st->fifo_mode = ADXL372_FIFO_BYPASSED;
+		st->int1_bitmask &= ~ADXL372_INT1_MAP_FIFO_FULL_MSK;
+		adxl372_set_interrupts(st, st->int1_bitmask, 0);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int adxl372_buffer_predisable(struct iio_dev *indio_dev)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	st->int1_bitmask &= ~ADXL372_INT1_MAP_FIFO_FULL_MSK;
+	adxl372_set_interrupts(st, st->int1_bitmask, 0);
+	st->fifo_mode = ADXL372_FIFO_BYPASSED;
+	adxl372_configure_fifo(st);
+
+	return 0;
+}
+
+static const struct iio_buffer_setup_ops adxl372_buffer_ops = {
+	.postenable = adxl372_buffer_postenable,
+	.predisable = adxl372_buffer_predisable,
+};
+
+static int adxl372_dready_trig_set_state(struct iio_trigger *trig,
+					 bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	if (state)
+		st->int1_bitmask |= ADXL372_INT1_MAP_FIFO_FULL_MSK;
+
+	return adxl372_set_interrupts(st, st->int1_bitmask, 0);
+}
+
+static int adxl372_validate_trigger(struct iio_dev *indio_dev,
+				    struct iio_trigger *trig)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	if (st->dready_trig != trig && st->peak_datardy_trig != trig)
+		return -EINVAL;
+
+	return 0;
+}
+
+static const struct iio_trigger_ops adxl372_trigger_ops = {
+	.validate_device = &iio_trigger_validate_own_device,
+	.set_trigger_state = adxl372_dready_trig_set_state,
+};
+
+static int adxl372_peak_dready_trig_set_state(struct iio_trigger *trig,
+					      bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	if (state)
+		st->int1_bitmask |= ADXL372_INT1_MAP_FIFO_FULL_MSK;
+
+	st->peak_fifo_mode_en = state;
+
+	return adxl372_set_interrupts(st, st->int1_bitmask, 0);
+}
+
+static const struct iio_trigger_ops adxl372_peak_data_trigger_ops = {
+	.validate_device = &iio_trigger_validate_own_device,
+	.set_trigger_state = adxl372_peak_dready_trig_set_state,
+};
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("400 800 1600 3200 6400");
+static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
+		       0444, adxl372_show_filter_freq_avail, NULL, 0);
+
+static struct attribute *adxl372_attributes[] = {
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	&iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group adxl372_attrs_group = {
+	.attrs = adxl372_attributes,
+};
+
+static const struct iio_info adxl372_info = {
+	.validate_trigger = &adxl372_validate_trigger,
+	.attrs = &adxl372_attrs_group,
+	.read_raw = adxl372_read_raw,
+	.write_raw = adxl372_write_raw,
+	.read_event_config = adxl372_read_event_config,
+	.write_event_config = adxl372_write_event_config,
+	.read_event_value = adxl372_read_event_value,
+	.write_event_value = adxl372_write_event_value,
+	.debugfs_reg_access = &adxl372_reg_access,
+	.hwfifo_set_watermark = adxl372_set_watermark,
+};
+
+bool adxl372_readable_noinc_reg(struct device *dev, unsigned int reg)
+{
+	return (reg == ADXL372_FIFO_DATA);
+}
+EXPORT_SYMBOL_GPL(adxl372_readable_noinc_reg);
+
+int adxl372_probe(struct device *dev, struct regmap *regmap,
+		  int irq, const char *name)
+{
+	struct iio_dev *indio_dev;
+	struct adxl372_state *st;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+	dev_set_drvdata(dev, indio_dev);
+
+	st->dev = dev;
+	st->regmap = regmap;
+	st->irq = irq;
+
+	mutex_init(&st->threshold_m);
+
+	indio_dev->channels = adxl372_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adxl372_channels);
+	indio_dev->available_scan_masks = adxl372_channel_masks;
+	indio_dev->name = name;
+	indio_dev->info = &adxl372_info;
+	indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
+
+	ret = adxl372_setup(st);
+	if (ret < 0) {
+		dev_err(dev, "ADXL372 setup failed\n");
+		return ret;
+	}
+
+	ret = devm_iio_triggered_buffer_setup(dev,
+					      indio_dev, NULL,
+					      adxl372_trigger_handler,
+					      &adxl372_buffer_ops);
+	if (ret < 0)
+		return ret;
+
+	iio_buffer_set_attrs(indio_dev->buffer, adxl372_fifo_attributes);
+
+	if (st->irq) {
+		st->dready_trig = devm_iio_trigger_alloc(dev,
+							 "%s-dev%d",
+							 indio_dev->name,
+							 indio_dev->id);
+		if (st->dready_trig == NULL)
+			return -ENOMEM;
+
+		st->peak_datardy_trig = devm_iio_trigger_alloc(dev,
+							       "%s-dev%d-peak",
+							       indio_dev->name,
+							       indio_dev->id);
+		if (!st->peak_datardy_trig)
+			return -ENOMEM;
+
+		st->dready_trig->ops = &adxl372_trigger_ops;
+		st->peak_datardy_trig->ops = &adxl372_peak_data_trigger_ops;
+		st->dready_trig->dev.parent = dev;
+		st->peak_datardy_trig->dev.parent = dev;
+		iio_trigger_set_drvdata(st->dready_trig, indio_dev);
+		iio_trigger_set_drvdata(st->peak_datardy_trig, indio_dev);
+		ret = devm_iio_trigger_register(dev, st->dready_trig);
+		if (ret < 0)
+			return ret;
+
+		ret = devm_iio_trigger_register(dev, st->peak_datardy_trig);
+		if (ret < 0)
+			return ret;
+
+		indio_dev->trig = iio_trigger_get(st->dready_trig);
+
+		ret = devm_request_threaded_irq(dev, st->irq,
+					iio_trigger_generic_data_rdy_poll,
+					NULL,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					indio_dev->name, st->dready_trig);
+		if (ret < 0)
+			return ret;
+	}
+
+	return devm_iio_device_register(dev, indio_dev);
+}
+EXPORT_SYMBOL_GPL(adxl372_probe);
+
+MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
+MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/adxl372.h b/drivers/iio/accel/adxl372.h
new file mode 100644
index 000000000..80a0aa971
--- /dev/null
+++ b/drivers/iio/accel/adxl372.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * ADXL372 3-Axis Digital Accelerometer
+ *
+ * Copyright 2018 Analog Devices Inc.
+ */
+
+#ifndef _ADXL372_H_
+#define _ADXL372_H_
+
+#define ADXL372_REVID	0x03
+
+int adxl372_probe(struct device *dev, struct regmap *regmap,
+		  int irq, const char *name);
+bool adxl372_readable_noinc_reg(struct device *dev, unsigned int reg);
+
+#endif /* _ADXL372_H_ */
diff --git a/drivers/iio/accel/adxl372_i2c.c b/drivers/iio/accel/adxl372_i2c.c
new file mode 100644
index 000000000..9a07ab3d1
--- /dev/null
+++ b/drivers/iio/accel/adxl372_i2c.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ADXL372 3-Axis Digital Accelerometer I2C driver
+ *
+ * Copyright 2018 Analog Devices Inc.
+ */
+
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "adxl372.h"
+
+static const struct regmap_config adxl372_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.readable_noinc_reg = adxl372_readable_noinc_reg,
+};
+
+static int adxl372_i2c_probe(struct i2c_client *client,
+			     const struct i2c_device_id *id)
+{
+	struct regmap *regmap;
+	unsigned int regval;
+	int ret;
+
+	regmap = devm_regmap_init_i2c(client, &adxl372_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	ret = regmap_read(regmap, ADXL372_REVID, &regval);
+	if (ret < 0)
+		return ret;
+
+	/* Starting with the 3rd revision an I2C chip bug was fixed */
+	if (regval < 3)
+		dev_warn(&client->dev,
+		"I2C might not work properly with other devices on the bus");
+
+	return adxl372_probe(&client->dev, regmap, client->irq, id->name);
+}
+
+static const struct i2c_device_id adxl372_i2c_id[] = {
+	{ "adxl372", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, adxl372_i2c_id);
+
+static const struct of_device_id adxl372_of_match[] = {
+	{ .compatible = "adi,adxl372" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, adxl372_of_match);
+
+static struct i2c_driver adxl372_i2c_driver = {
+	.driver = {
+		.name = "adxl372_i2c",
+		.of_match_table = adxl372_of_match,
+	},
+	.probe = adxl372_i2c_probe,
+	.id_table = adxl372_i2c_id,
+};
+
+module_i2c_driver(adxl372_i2c_driver);
+
+MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
+MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer I2C driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/adxl372_spi.c b/drivers/iio/accel/adxl372_spi.c
new file mode 100644
index 000000000..1f1352fee
--- /dev/null
+++ b/drivers/iio/accel/adxl372_spi.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ADXL372 3-Axis Digital Accelerometer SPI driver
+ *
+ * Copyright 2018 Analog Devices Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/spi/spi.h>
+
+#include "adxl372.h"
+
+static const struct regmap_config adxl372_spi_regmap_config = {
+	.reg_bits = 7,
+	.pad_bits = 1,
+	.val_bits = 8,
+	.read_flag_mask = BIT(0),
+	.readable_noinc_reg = adxl372_readable_noinc_reg,
+};
+
+static int adxl372_spi_probe(struct spi_device *spi)
+{
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	struct regmap *regmap;
+
+	regmap = devm_regmap_init_spi(spi, &adxl372_spi_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return adxl372_probe(&spi->dev, regmap, spi->irq, id->name);
+}
+
+static const struct spi_device_id adxl372_spi_id[] = {
+	{ "adxl372", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(spi, adxl372_spi_id);
+
+static const struct of_device_id adxl372_of_match[] = {
+	{ .compatible = "adi,adxl372" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, adxl372_of_match);
+
+static struct spi_driver adxl372_spi_driver = {
+	.driver = {
+		.name = "adxl372_spi",
+		.of_match_table = adxl372_of_match,
+	},
+	.probe = adxl372_spi_probe,
+	.id_table = adxl372_spi_id,
+};
+
+module_spi_driver(adxl372_spi_driver);
+
+MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
+MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer SPI driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c
new file mode 100644
index 000000000..6aa5a72c8
--- /dev/null
+++ b/drivers/iio/accel/bma180.c
@@ -0,0 +1,1221 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor
+ *
+ * Copyright 2013 Oleksandr Kravchenko <x0199363@ti.com>
+ *
+ * Support for BMA250 (c) Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * SPI is not supported by driver
+ * BMA023/BMA150/SMB380: 7-bit I2C slave address 0x38
+ * BMA180: 7-bit I2C slave address 0x40 or 0x41
+ * BMA250: 7-bit I2C slave address 0x18 or 0x19
+ * BMA254: 7-bit I2C slave address 0x18 or 0x19
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/bitops.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define BMA180_DRV_NAME "bma180"
+#define BMA180_IRQ_NAME "bma180_event"
+
+enum chip_ids {
+	BMA023,
+	BMA150,
+	BMA180,
+	BMA250,
+	BMA254,
+};
+
+struct bma180_data;
+
+struct bma180_part_info {
+	u8 chip_id;
+	const struct iio_chan_spec *channels;
+	unsigned int num_channels;
+	const int *scale_table;
+	unsigned int num_scales;
+	const int *bw_table;
+	unsigned int num_bw;
+	int temp_offset;
+
+	u8 int_reset_reg, int_reset_mask;
+	u8 sleep_reg, sleep_mask;
+	u8 bw_reg, bw_mask, bw_offset;
+	u8 scale_reg, scale_mask;
+	u8 power_reg, power_mask, lowpower_val;
+	u8 int_enable_reg, int_enable_mask;
+	u8 int_map_reg, int_enable_dataready_int1_mask;
+	u8 softreset_reg, softreset_val;
+
+	int (*chip_config)(struct bma180_data *data);
+	void (*chip_disable)(struct bma180_data *data);
+};
+
+/* Register set */
+#define BMA023_CTRL_REG0	0x0a
+#define BMA023_CTRL_REG1	0x0b
+#define BMA023_CTRL_REG2	0x14
+#define BMA023_CTRL_REG3	0x15
+
+#define BMA023_RANGE_MASK	GENMASK(4, 3) /* Range of accel values */
+#define BMA023_BW_MASK		GENMASK(2, 0) /* Accel bandwidth */
+#define BMA023_SLEEP		BIT(0)
+#define BMA023_INT_RESET_MASK	BIT(6)
+#define BMA023_NEW_DATA_INT	BIT(5) /* Intr every new accel data is ready */
+#define BMA023_RESET_VAL	BIT(1)
+
+#define BMA180_CHIP_ID		0x00 /* Need to distinguish BMA180 from other */
+#define BMA180_ACC_X_LSB	0x02 /* First of 6 registers of accel data */
+#define BMA180_TEMP		0x08
+#define BMA180_CTRL_REG0	0x0d
+#define BMA180_RESET		0x10
+#define BMA180_BW_TCS		0x20
+#define BMA180_CTRL_REG3	0x21
+#define BMA180_TCO_Z		0x30
+#define BMA180_OFFSET_LSB1	0x35
+
+/* BMA180_CTRL_REG0 bits */
+#define BMA180_DIS_WAKE_UP	BIT(0) /* Disable wake up mode */
+#define BMA180_SLEEP		BIT(1) /* 1 - chip will sleep */
+#define BMA180_EE_W		BIT(4) /* Unlock writing to addr from 0x20 */
+#define BMA180_RESET_INT	BIT(6) /* Reset pending interrupts */
+
+/* BMA180_CTRL_REG3 bits */
+#define BMA180_NEW_DATA_INT	BIT(1) /* Intr every new accel data is ready */
+
+/* BMA180_OFFSET_LSB1 skipping mode bit */
+#define BMA180_SMP_SKIP		BIT(0)
+
+/* Bit masks for registers bit fields */
+#define BMA180_RANGE		0x0e /* Range of measured accel values */
+#define BMA180_BW		0xf0 /* Accel bandwidth */
+#define BMA180_MODE_CONFIG	0x03 /* Config operation modes */
+
+/* We have to write this value in reset register to do soft reset */
+#define BMA180_RESET_VAL	0xb6
+
+#define BMA023_ID_REG_VAL	0x02
+#define BMA180_ID_REG_VAL	0x03
+#define BMA250_ID_REG_VAL	0x03
+#define BMA254_ID_REG_VAL	0xfa /* 250 decimal */
+
+/* Chip power modes */
+#define BMA180_LOW_POWER	0x03
+
+#define BMA250_RANGE_REG	0x0f
+#define BMA250_BW_REG		0x10
+#define BMA250_POWER_REG	0x11
+#define BMA250_RESET_REG	0x14
+#define BMA250_INT_ENABLE_REG	0x17
+#define BMA250_INT_MAP_REG	0x1a
+#define BMA250_INT_RESET_REG	0x21
+
+#define BMA250_RANGE_MASK	GENMASK(3, 0) /* Range of accel values */
+#define BMA250_BW_MASK		GENMASK(4, 0) /* Accel bandwidth */
+#define BMA250_BW_OFFSET	8
+#define BMA250_SUSPEND_MASK	BIT(7) /* chip will sleep */
+#define BMA250_LOWPOWER_MASK	BIT(6)
+#define BMA250_DATA_INTEN_MASK	BIT(4)
+#define BMA250_INT1_DATA_MASK	BIT(0)
+#define BMA250_INT_RESET_MASK	BIT(7) /* Reset pending interrupts */
+
+#define BMA254_RANGE_REG	0x0f
+#define BMA254_BW_REG		0x10
+#define BMA254_POWER_REG	0x11
+#define BMA254_RESET_REG	0x14
+#define BMA254_INT_ENABLE_REG	0x17
+#define BMA254_INT_MAP_REG	0x1a
+#define BMA254_INT_RESET_REG	0x21
+
+#define BMA254_RANGE_MASK	GENMASK(3, 0) /* Range of accel values */
+#define BMA254_BW_MASK		GENMASK(4, 0) /* Accel bandwidth */
+#define BMA254_BW_OFFSET	8
+#define BMA254_SUSPEND_MASK	BIT(7) /* chip will sleep */
+#define BMA254_LOWPOWER_MASK	BIT(6)
+#define BMA254_DATA_INTEN_MASK	BIT(4)
+#define BMA254_INT2_DATA_MASK	BIT(7)
+#define BMA254_INT1_DATA_MASK	BIT(0)
+#define BMA254_INT_RESET_MASK	BIT(7) /* Reset pending interrupts */
+
+struct bma180_data {
+	struct regulator *vdd_supply;
+	struct regulator *vddio_supply;
+	struct i2c_client *client;
+	struct iio_trigger *trig;
+	const struct bma180_part_info *part_info;
+	struct iio_mount_matrix orientation;
+	struct mutex mutex;
+	bool sleep_state;
+	int scale;
+	int bw;
+	bool pmode;
+	/* Ensure timestamp is naturally aligned */
+	struct {
+		s16 chan[4];
+		s64 timestamp __aligned(8);
+	} scan;
+};
+
+enum bma180_chan {
+	AXIS_X,
+	AXIS_Y,
+	AXIS_Z,
+	TEMP
+};
+
+static int bma023_bw_table[] = { 25, 50, 100, 190, 375, 750, 1500 }; /* Hz */
+static int bma023_scale_table[] = { 2452, 4903, 9709, };
+
+static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
+static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };
+
+static int bma25x_bw_table[] = { 8, 16, 31, 63, 125, 250 }; /* Hz */
+static int bma25x_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0,
+	0, 0, 306458 };
+
+static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan)
+{
+	int ret;
+
+	if (data->sleep_state)
+		return -EBUSY;
+
+	switch (chan) {
+	case TEMP:
+		ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP);
+		if (ret < 0)
+			dev_err(&data->client->dev, "failed to read temp register\n");
+		break;
+	default:
+		ret = i2c_smbus_read_word_data(data->client,
+			BMA180_ACC_X_LSB + chan * 2);
+		if (ret < 0)
+			dev_err(&data->client->dev,
+				"failed to read accel_%c register\n",
+				'x' + chan);
+	}
+
+	return ret;
+}
+
+static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
+{
+	int ret = i2c_smbus_read_byte_data(data->client, reg);
+	u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));
+
+	if (ret < 0)
+		return ret;
+
+	return i2c_smbus_write_byte_data(data->client, reg, reg_val);
+}
+
+static int bma180_reset_intr(struct bma180_data *data)
+{
+	int ret = bma180_set_bits(data, data->part_info->int_reset_reg,
+		data->part_info->int_reset_mask, 1);
+
+	if (ret)
+		dev_err(&data->client->dev, "failed to reset interrupt\n");
+
+	return ret;
+}
+
+static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state)
+{
+	int ret = bma180_set_bits(data, data->part_info->int_enable_reg,
+			data->part_info->int_enable_mask, state);
+	if (ret)
+		goto err;
+	ret = bma180_reset_intr(data);
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	dev_err(&data->client->dev,
+		"failed to set new data interrupt state %d\n", state);
+	return ret;
+}
+
+static int bma180_set_sleep_state(struct bma180_data *data, bool state)
+{
+	int ret = bma180_set_bits(data, data->part_info->sleep_reg,
+		data->part_info->sleep_mask, state);
+
+	if (ret) {
+		dev_err(&data->client->dev,
+			"failed to set sleep state %d\n", state);
+		return ret;
+	}
+	data->sleep_state = state;
+
+	return 0;
+}
+
+static int bma180_set_ee_writing_state(struct bma180_data *data, bool state)
+{
+	int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);
+
+	if (ret)
+		dev_err(&data->client->dev,
+			"failed to set ee writing state %d\n", state);
+
+	return ret;
+}
+
+static int bma180_set_bw(struct bma180_data *data, int val)
+{
+	int ret, i;
+
+	if (data->sleep_state)
+		return -EBUSY;
+
+	for (i = 0; i < data->part_info->num_bw; ++i) {
+		if (data->part_info->bw_table[i] == val) {
+			ret = bma180_set_bits(data, data->part_info->bw_reg,
+				data->part_info->bw_mask,
+				i + data->part_info->bw_offset);
+			if (ret) {
+				dev_err(&data->client->dev,
+					"failed to set bandwidth\n");
+				return ret;
+			}
+			data->bw = val;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int bma180_set_scale(struct bma180_data *data, int val)
+{
+	int ret, i;
+
+	if (data->sleep_state)
+		return -EBUSY;
+
+	for (i = 0; i < data->part_info->num_scales; ++i)
+		if (data->part_info->scale_table[i] == val) {
+			ret = bma180_set_bits(data, data->part_info->scale_reg,
+				data->part_info->scale_mask, i);
+			if (ret) {
+				dev_err(&data->client->dev,
+					"failed to set scale\n");
+				return ret;
+			}
+			data->scale = val;
+			return 0;
+		}
+
+	return -EINVAL;
+}
+
+static int bma180_set_pmode(struct bma180_data *data, bool mode)
+{
+	u8 reg_val = mode ? data->part_info->lowpower_val : 0;
+	int ret = bma180_set_bits(data, data->part_info->power_reg,
+		data->part_info->power_mask, reg_val);
+
+	if (ret) {
+		dev_err(&data->client->dev, "failed to set power mode\n");
+		return ret;
+	}
+	data->pmode = mode;
+
+	return 0;
+}
+
+static int bma180_soft_reset(struct bma180_data *data)
+{
+	int ret = i2c_smbus_write_byte_data(data->client,
+		data->part_info->softreset_reg,
+		data->part_info->softreset_val);
+
+	if (ret)
+		dev_err(&data->client->dev, "failed to reset the chip\n");
+
+	return ret;
+}
+
+static int bma180_chip_init(struct bma180_data *data)
+{
+	/* Try to read chip_id register. It must return 0x03. */
+	int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);
+
+	if (ret < 0)
+		return ret;
+	if (ret != data->part_info->chip_id) {
+		dev_err(&data->client->dev, "wrong chip ID %d expected %d\n",
+			ret, data->part_info->chip_id);
+		return -ENODEV;
+	}
+
+	ret = bma180_soft_reset(data);
+	if (ret)
+		return ret;
+	/*
+	 * No serial transaction should occur within minimum 10 us
+	 * after soft_reset command
+	 */
+	msleep(20);
+
+	return bma180_set_new_data_intr_state(data, false);
+}
+
+static int bma023_chip_config(struct bma180_data *data)
+{
+	int ret = bma180_chip_init(data);
+
+	if (ret)
+		goto err;
+
+	ret = bma180_set_bw(data, 50); /* 50 Hz */
+	if (ret)
+		goto err;
+	ret = bma180_set_scale(data, 2452); /* 2 G */
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	dev_err(&data->client->dev, "failed to config the chip\n");
+	return ret;
+}
+
+static int bma180_chip_config(struct bma180_data *data)
+{
+	int ret = bma180_chip_init(data);
+
+	if (ret)
+		goto err;
+	ret = bma180_set_pmode(data, false);
+	if (ret)
+		goto err;
+	ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
+	if (ret)
+		goto err;
+	ret = bma180_set_ee_writing_state(data, true);
+	if (ret)
+		goto err;
+	ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
+	if (ret)
+		goto err;
+	ret = bma180_set_bw(data, 20); /* 20 Hz */
+	if (ret)
+		goto err;
+	ret = bma180_set_scale(data, 2452); /* 2 G */
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	dev_err(&data->client->dev, "failed to config the chip\n");
+	return ret;
+}
+
+static int bma25x_chip_config(struct bma180_data *data)
+{
+	int ret = bma180_chip_init(data);
+
+	if (ret)
+		goto err;
+	ret = bma180_set_pmode(data, false);
+	if (ret)
+		goto err;
+	ret = bma180_set_bw(data, 16); /* 16 Hz */
+	if (ret)
+		goto err;
+	ret = bma180_set_scale(data, 38344); /* 2 G */
+	if (ret)
+		goto err;
+	/*
+	 * This enables dataready interrupt on the INT1 pin
+	 * FIXME: support using the INT2 pin
+	 */
+	ret = bma180_set_bits(data, data->part_info->int_map_reg,
+		data->part_info->int_enable_dataready_int1_mask, 1);
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	dev_err(&data->client->dev, "failed to config the chip\n");
+	return ret;
+}
+
+static void bma023_chip_disable(struct bma180_data *data)
+{
+	if (bma180_set_sleep_state(data, true))
+		goto err;
+
+	return;
+
+err:
+	dev_err(&data->client->dev, "failed to disable the chip\n");
+}
+
+static void bma180_chip_disable(struct bma180_data *data)
+{
+	if (bma180_set_new_data_intr_state(data, false))
+		goto err;
+	if (bma180_set_ee_writing_state(data, false))
+		goto err;
+	if (bma180_set_sleep_state(data, true))
+		goto err;
+
+	return;
+
+err:
+	dev_err(&data->client->dev, "failed to disable the chip\n");
+}
+
+static void bma25x_chip_disable(struct bma180_data *data)
+{
+	if (bma180_set_new_data_intr_state(data, false))
+		goto err;
+	if (bma180_set_sleep_state(data, true))
+		goto err;
+
+	return;
+
+err:
+	dev_err(&data->client->dev, "failed to disable the chip\n");
+}
+
+static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned int n,
+				 bool micros)
+{
+	size_t len = 0;
+	int i;
+
+	for (i = 0; i < n; i++) {
+		if (!vals[i])
+			continue;
+		len += scnprintf(buf + len, PAGE_SIZE - len,
+			micros ? "0.%06d " : "%d ", vals[i]);
+	}
+	buf[len - 1] = '\n';
+
+	return len;
+}
+
+static ssize_t bma180_show_filter_freq_avail(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
+
+	return bma180_show_avail(buf, data->part_info->bw_table,
+		data->part_info->num_bw, false);
+}
+
+static ssize_t bma180_show_scale_avail(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
+
+	return bma180_show_avail(buf, data->part_info->scale_table,
+		data->part_info->num_scales, true);
+}
+
+static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
+	S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);
+
+static IIO_DEVICE_ATTR(in_accel_scale_available,
+	S_IRUGO, bma180_show_scale_avail, NULL, 0);
+
+static struct attribute *bma180_attributes[] = {
+	&iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
+		dev_attr.attr,
+	&iio_dev_attr_in_accel_scale_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group bma180_attrs_group = {
+	.attrs = bma180_attributes,
+};
+
+static int bma180_read_raw(struct iio_dev *indio_dev,
+		struct iio_chan_spec const *chan, int *val, int *val2,
+		long mask)
+{
+	struct bma180_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = iio_device_claim_direct_mode(indio_dev);
+		if (ret)
+			return ret;
+
+		mutex_lock(&data->mutex);
+		ret = bma180_get_data_reg(data, chan->scan_index);
+		mutex_unlock(&data->mutex);
+		iio_device_release_direct_mode(indio_dev);
+		if (ret < 0)
+			return ret;
+		if (chan->scan_type.sign == 's') {
+			*val = sign_extend32(ret >> chan->scan_type.shift,
+				chan->scan_type.realbits - 1);
+		} else {
+			*val = ret;
+		}
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+		*val = data->bw;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			*val = 0;
+			*val2 = data->scale;
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_TEMP:
+			*val = 500;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_OFFSET:
+		*val = data->part_info->temp_offset;
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int bma180_write_raw(struct iio_dev *indio_dev,
+		struct iio_chan_spec const *chan, int val, int val2, long mask)
+{
+	struct bma180_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		if (val)
+			return -EINVAL;
+		mutex_lock(&data->mutex);
+		ret = bma180_set_scale(data, val2);
+		mutex_unlock(&data->mutex);
+		return ret;
+	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+		if (val2)
+			return -EINVAL;
+		mutex_lock(&data->mutex);
+		ret = bma180_set_bw(data, val);
+		mutex_unlock(&data->mutex);
+		return ret;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info bma180_info = {
+	.attrs			= &bma180_attrs_group,
+	.read_raw		= bma180_read_raw,
+	.write_raw		= bma180_write_raw,
+};
+
+static const char * const bma180_power_modes[] = { "low_noise", "low_power" };
+
+static int bma180_get_power_mode(struct iio_dev *indio_dev,
+		const struct iio_chan_spec *chan)
+{
+	struct bma180_data *data = iio_priv(indio_dev);
+
+	return data->pmode;
+}
+
+static int bma180_set_power_mode(struct iio_dev *indio_dev,
+		const struct iio_chan_spec *chan, unsigned int mode)
+{
+	struct bma180_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = bma180_set_pmode(data, mode);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static const struct iio_mount_matrix *
+bma180_accel_get_mount_matrix(const struct iio_dev *indio_dev,
+				const struct iio_chan_spec *chan)
+{
+	struct bma180_data *data = iio_priv(indio_dev);
+
+	return &data->orientation;
+}
+
+static const struct iio_enum bma180_power_mode_enum = {
+	.items = bma180_power_modes,
+	.num_items = ARRAY_SIZE(bma180_power_modes),
+	.get = bma180_get_power_mode,
+	.set = bma180_set_power_mode,
+};
+
+static const struct iio_chan_spec_ext_info bma023_ext_info[] = {
+	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
+	{ }
+};
+
+static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
+	IIO_ENUM("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum),
+	IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
+	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
+	{ }
+};
+
+#define BMA023_ACC_CHANNEL(_axis, _bits) {				\
+	.type = IIO_ACCEL,						\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##_axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
+		BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),	\
+	.scan_index = AXIS_##_axis,					\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = _bits,					\
+		.storagebits = 16,					\
+		.shift = 16 - _bits,					\
+	},								\
+	.ext_info = bma023_ext_info,					\
+}
+
+#define BMA150_TEMP_CHANNEL {						\
+	.type = IIO_TEMP,						\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
+		BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET),	\
+	.scan_index = TEMP,						\
+	.scan_type = {							\
+		.sign = 'u',						\
+		.realbits = 8,						\
+		.storagebits = 16,					\
+	},								\
+}
+
+#define BMA180_ACC_CHANNEL(_axis, _bits) {				\
+	.type = IIO_ACCEL,						\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##_axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
+		BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),	\
+	.scan_index = AXIS_##_axis,					\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = _bits,					\
+		.storagebits = 16,					\
+		.shift = 16 - _bits,					\
+	},								\
+	.ext_info = bma180_ext_info,					\
+}
+
+#define BMA180_TEMP_CHANNEL {						\
+	.type = IIO_TEMP,						\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
+		BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET),	\
+	.scan_index = TEMP,						\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 8,						\
+		.storagebits = 16,					\
+	},								\
+}
+
+static const struct iio_chan_spec bma023_channels[] = {
+	BMA023_ACC_CHANNEL(X, 10),
+	BMA023_ACC_CHANNEL(Y, 10),
+	BMA023_ACC_CHANNEL(Z, 10),
+	IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static const struct iio_chan_spec bma150_channels[] = {
+	BMA023_ACC_CHANNEL(X, 10),
+	BMA023_ACC_CHANNEL(Y, 10),
+	BMA023_ACC_CHANNEL(Z, 10),
+	BMA150_TEMP_CHANNEL,
+	IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static const struct iio_chan_spec bma180_channels[] = {
+	BMA180_ACC_CHANNEL(X, 14),
+	BMA180_ACC_CHANNEL(Y, 14),
+	BMA180_ACC_CHANNEL(Z, 14),
+	BMA180_TEMP_CHANNEL,
+	IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static const struct iio_chan_spec bma250_channels[] = {
+	BMA180_ACC_CHANNEL(X, 10),
+	BMA180_ACC_CHANNEL(Y, 10),
+	BMA180_ACC_CHANNEL(Z, 10),
+	BMA180_TEMP_CHANNEL,
+	IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static const struct iio_chan_spec bma254_channels[] = {
+	BMA180_ACC_CHANNEL(X, 12),
+	BMA180_ACC_CHANNEL(Y, 12),
+	BMA180_ACC_CHANNEL(Z, 12),
+	BMA180_TEMP_CHANNEL,
+	IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static const struct bma180_part_info bma180_part_info[] = {
+	[BMA023] = {
+		.chip_id = BMA023_ID_REG_VAL,
+		.channels = bma023_channels,
+		.num_channels = ARRAY_SIZE(bma023_channels),
+		.scale_table = bma023_scale_table,
+		.num_scales = ARRAY_SIZE(bma023_scale_table),
+		.bw_table = bma023_bw_table,
+		.num_bw = ARRAY_SIZE(bma023_bw_table),
+		/* No temperature channel */
+		.temp_offset = 0,
+		.int_reset_reg = BMA023_CTRL_REG0,
+		.int_reset_mask = BMA023_INT_RESET_MASK,
+		.sleep_reg = BMA023_CTRL_REG0,
+		.sleep_mask = BMA023_SLEEP,
+		.bw_reg = BMA023_CTRL_REG2,
+		.bw_mask = BMA023_BW_MASK,
+		.scale_reg = BMA023_CTRL_REG2,
+		.scale_mask = BMA023_RANGE_MASK,
+		/* No power mode on bma023 */
+		.power_reg = 0,
+		.power_mask = 0,
+		.lowpower_val = 0,
+		.int_enable_reg = BMA023_CTRL_REG3,
+		.int_enable_mask = BMA023_NEW_DATA_INT,
+		.softreset_reg = BMA023_CTRL_REG0,
+		.softreset_val = BMA023_RESET_VAL,
+		.chip_config = bma023_chip_config,
+		.chip_disable = bma023_chip_disable,
+	},
+	[BMA150] = {
+		.chip_id = BMA023_ID_REG_VAL,
+		.channels = bma150_channels,
+		.num_channels = ARRAY_SIZE(bma150_channels),
+		.scale_table = bma023_scale_table,
+		.num_scales = ARRAY_SIZE(bma023_scale_table),
+		.bw_table = bma023_bw_table,
+		.num_bw = ARRAY_SIZE(bma023_bw_table),
+		.temp_offset = -60, /* 0 LSB @ -30 degree C */
+		.int_reset_reg = BMA023_CTRL_REG0,
+		.int_reset_mask = BMA023_INT_RESET_MASK,
+		.sleep_reg = BMA023_CTRL_REG0,
+		.sleep_mask = BMA023_SLEEP,
+		.bw_reg = BMA023_CTRL_REG2,
+		.bw_mask = BMA023_BW_MASK,
+		.scale_reg = BMA023_CTRL_REG2,
+		.scale_mask = BMA023_RANGE_MASK,
+		/* No power mode on bma150 */
+		.power_reg = 0,
+		.power_mask = 0,
+		.lowpower_val = 0,
+		.int_enable_reg = BMA023_CTRL_REG3,
+		.int_enable_mask = BMA023_NEW_DATA_INT,
+		.softreset_reg = BMA023_CTRL_REG0,
+		.softreset_val = BMA023_RESET_VAL,
+		.chip_config = bma023_chip_config,
+		.chip_disable = bma023_chip_disable,
+	},
+	[BMA180] = {
+		.chip_id = BMA180_ID_REG_VAL,
+		.channels = bma180_channels,
+		.num_channels = ARRAY_SIZE(bma180_channels),
+		.scale_table = bma180_scale_table,
+		.num_scales = ARRAY_SIZE(bma180_scale_table),
+		.bw_table = bma180_bw_table,
+		.num_bw = ARRAY_SIZE(bma180_bw_table),
+		.temp_offset = 48, /* 0 LSB @ 24 degree C */
+		.int_reset_reg = BMA180_CTRL_REG0,
+		.int_reset_mask = BMA180_RESET_INT,
+		.sleep_reg = BMA180_CTRL_REG0,
+		.sleep_mask = BMA180_SLEEP,
+		.bw_reg = BMA180_BW_TCS,
+		.bw_mask = BMA180_BW,
+		.scale_reg = BMA180_OFFSET_LSB1,
+		.scale_mask = BMA180_RANGE,
+		.power_reg = BMA180_TCO_Z,
+		.power_mask = BMA180_MODE_CONFIG,
+		.lowpower_val = BMA180_LOW_POWER,
+		.int_enable_reg = BMA180_CTRL_REG3,
+		.int_enable_mask = BMA180_NEW_DATA_INT,
+		.softreset_reg = BMA180_RESET,
+		.softreset_val = BMA180_RESET_VAL,
+		.chip_config = bma180_chip_config,
+		.chip_disable = bma180_chip_disable,
+	},
+	[BMA250] = {
+		.chip_id = BMA250_ID_REG_VAL,
+		.channels = bma250_channels,
+		.num_channels = ARRAY_SIZE(bma250_channels),
+		.scale_table = bma25x_scale_table,
+		.num_scales = ARRAY_SIZE(bma25x_scale_table),
+		.bw_table = bma25x_bw_table,
+		.num_bw = ARRAY_SIZE(bma25x_bw_table),
+		.temp_offset = 48, /* 0 LSB @ 24 degree C */
+		.int_reset_reg = BMA250_INT_RESET_REG,
+		.int_reset_mask = BMA250_INT_RESET_MASK,
+		.sleep_reg = BMA250_POWER_REG,
+		.sleep_mask = BMA250_SUSPEND_MASK,
+		.bw_reg = BMA250_BW_REG,
+		.bw_mask = BMA250_BW_MASK,
+		.bw_offset = BMA250_BW_OFFSET,
+		.scale_reg = BMA250_RANGE_REG,
+		.scale_mask = BMA250_RANGE_MASK,
+		.power_reg = BMA250_POWER_REG,
+		.power_mask = BMA250_LOWPOWER_MASK,
+		.lowpower_val = 1,
+		.int_enable_reg = BMA250_INT_ENABLE_REG,
+		.int_enable_mask = BMA250_DATA_INTEN_MASK,
+		.int_map_reg = BMA250_INT_MAP_REG,
+		.int_enable_dataready_int1_mask = BMA250_INT1_DATA_MASK,
+		.softreset_reg = BMA250_RESET_REG,
+		.softreset_val = BMA180_RESET_VAL,
+		.chip_config = bma25x_chip_config,
+		.chip_disable = bma25x_chip_disable,
+	},
+	[BMA254] = {
+		.chip_id = BMA254_ID_REG_VAL,
+		.channels = bma254_channels,
+		.num_channels = ARRAY_SIZE(bma254_channels),
+		.scale_table = bma25x_scale_table,
+		.num_scales = ARRAY_SIZE(bma25x_scale_table),
+		.bw_table = bma25x_bw_table,
+		.num_bw = ARRAY_SIZE(bma25x_bw_table),
+		.temp_offset = 46, /* 0 LSB @ 23 degree C */
+		.int_reset_reg = BMA254_INT_RESET_REG,
+		.int_reset_mask = BMA254_INT_RESET_MASK,
+		.sleep_reg = BMA254_POWER_REG,
+		.sleep_mask = BMA254_SUSPEND_MASK,
+		.bw_reg = BMA254_BW_REG,
+		.bw_mask = BMA254_BW_MASK,
+		.bw_offset = BMA254_BW_OFFSET,
+		.scale_reg = BMA254_RANGE_REG,
+		.scale_mask = BMA254_RANGE_MASK,
+		.power_reg = BMA254_POWER_REG,
+		.power_mask = BMA254_LOWPOWER_MASK,
+		.lowpower_val = 1,
+		.int_enable_reg = BMA254_INT_ENABLE_REG,
+		.int_enable_mask = BMA254_DATA_INTEN_MASK,
+		.int_map_reg = BMA254_INT_MAP_REG,
+		.int_enable_dataready_int1_mask = BMA254_INT1_DATA_MASK,
+		.softreset_reg = BMA254_RESET_REG,
+		.softreset_val = BMA180_RESET_VAL,
+		.chip_config = bma25x_chip_config,
+		.chip_disable = bma25x_chip_disable,
+	},
+};
+
+static irqreturn_t bma180_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct bma180_data *data = iio_priv(indio_dev);
+	s64 time_ns = iio_get_time_ns(indio_dev);
+	int bit, ret, i = 0;
+
+	mutex_lock(&data->mutex);
+
+	for_each_set_bit(bit, indio_dev->active_scan_mask,
+			 indio_dev->masklength) {
+		ret = bma180_get_data_reg(data, bit);
+		if (ret < 0) {
+			mutex_unlock(&data->mutex);
+			goto err;
+		}
+		data->scan.chan[i++] = ret;
+	}
+
+	mutex_unlock(&data->mutex);
+
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns);
+err:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
+		bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct bma180_data *data = iio_priv(indio_dev);
+
+	return bma180_set_new_data_intr_state(data, state);
+}
+
+static int bma180_trig_try_reen(struct iio_trigger *trig)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct bma180_data *data = iio_priv(indio_dev);
+
+	return bma180_reset_intr(data);
+}
+
+static const struct iio_trigger_ops bma180_trigger_ops = {
+	.set_trigger_state = bma180_data_rdy_trigger_set_state,
+	.try_reenable = bma180_trig_try_reen,
+};
+
+static int bma180_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
+	struct bma180_data *data;
+	struct iio_dev *indio_dev;
+	enum chip_ids chip;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	data->client = client;
+	if (client->dev.of_node)
+		chip = (enum chip_ids)of_device_get_match_data(dev);
+	else
+		chip = id->driver_data;
+	data->part_info = &bma180_part_info[chip];
+
+	ret = iio_read_mount_matrix(dev, "mount-matrix",
+				&data->orientation);
+	if (ret)
+		return ret;
+
+	data->vdd_supply = devm_regulator_get(dev, "vdd");
+	if (IS_ERR(data->vdd_supply))
+		return dev_err_probe(dev, PTR_ERR(data->vdd_supply),
+				     "Failed to get vdd regulator\n");
+
+	data->vddio_supply = devm_regulator_get(dev, "vddio");
+	if (IS_ERR(data->vddio_supply))
+		return dev_err_probe(dev, PTR_ERR(data->vddio_supply),
+				     "Failed to get vddio regulator\n");
+
+	/* Typical voltage 2.4V these are min and max */
+	ret = regulator_set_voltage(data->vdd_supply, 1620000, 3600000);
+	if (ret)
+		return ret;
+	ret = regulator_set_voltage(data->vddio_supply, 1200000, 3600000);
+	if (ret)
+		return ret;
+	ret = regulator_enable(data->vdd_supply);
+	if (ret) {
+		dev_err(dev, "Failed to enable vdd regulator: %d\n", ret);
+		return ret;
+	}
+	ret = regulator_enable(data->vddio_supply);
+	if (ret) {
+		dev_err(dev, "Failed to enable vddio regulator: %d\n", ret);
+		goto err_disable_vdd;
+	}
+	/* Wait to make sure we started up properly (3 ms at least) */
+	usleep_range(3000, 5000);
+
+	ret = data->part_info->chip_config(data);
+	if (ret < 0)
+		goto err_chip_disable;
+
+	mutex_init(&data->mutex);
+	indio_dev->channels = data->part_info->channels;
+	indio_dev->num_channels = data->part_info->num_channels;
+	indio_dev->name = id->name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &bma180_info;
+
+	if (client->irq > 0) {
+		data->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
+			indio_dev->id);
+		if (!data->trig) {
+			ret = -ENOMEM;
+			goto err_chip_disable;
+		}
+
+		ret = devm_request_irq(dev, client->irq,
+			iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING,
+			"bma180_event", data->trig);
+		if (ret) {
+			dev_err(dev, "unable to request IRQ\n");
+			goto err_trigger_free;
+		}
+
+		data->trig->dev.parent = dev;
+		data->trig->ops = &bma180_trigger_ops;
+		iio_trigger_set_drvdata(data->trig, indio_dev);
+
+		ret = iio_trigger_register(data->trig);
+		if (ret)
+			goto err_trigger_free;
+
+		indio_dev->trig = iio_trigger_get(data->trig);
+	}
+
+	ret = iio_triggered_buffer_setup(indio_dev, NULL,
+			bma180_trigger_handler, NULL);
+	if (ret < 0) {
+		dev_err(dev, "unable to setup iio triggered buffer\n");
+		goto err_trigger_unregister;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(dev, "unable to register iio device\n");
+		goto err_buffer_cleanup;
+	}
+
+	return 0;
+
+err_buffer_cleanup:
+	iio_triggered_buffer_cleanup(indio_dev);
+err_trigger_unregister:
+	if (data->trig)
+		iio_trigger_unregister(data->trig);
+err_trigger_free:
+	iio_trigger_free(data->trig);
+err_chip_disable:
+	data->part_info->chip_disable(data);
+	regulator_disable(data->vddio_supply);
+err_disable_vdd:
+	regulator_disable(data->vdd_supply);
+
+	return ret;
+}
+
+static int bma180_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct bma180_data *data = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+	iio_triggered_buffer_cleanup(indio_dev);
+	if (data->trig) {
+		iio_trigger_unregister(data->trig);
+		iio_trigger_free(data->trig);
+	}
+
+	mutex_lock(&data->mutex);
+	data->part_info->chip_disable(data);
+	mutex_unlock(&data->mutex);
+	regulator_disable(data->vddio_supply);
+	regulator_disable(data->vdd_supply);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int bma180_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct bma180_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = bma180_set_sleep_state(data, true);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static int bma180_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct bma180_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = bma180_set_sleep_state(data, false);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
+#define BMA180_PM_OPS (&bma180_pm_ops)
+#else
+#define BMA180_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id bma180_ids[] = {
+	{ "bma023", BMA023 },
+	{ "bma150", BMA150 },
+	{ "bma180", BMA180 },
+	{ "bma250", BMA250 },
+	{ "bma254", BMA254 },
+	{ "smb380", BMA150 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(i2c, bma180_ids);
+
+static const struct of_device_id bma180_of_match[] = {
+	{
+		.compatible = "bosch,bma023",
+		.data = (void *)BMA023
+	},
+	{
+		.compatible = "bosch,bma150",
+		.data = (void *)BMA150
+	},
+	{
+		.compatible = "bosch,bma180",
+		.data = (void *)BMA180
+	},
+	{
+		.compatible = "bosch,bma250",
+		.data = (void *)BMA250
+	},
+	{
+		.compatible = "bosch,bma254",
+		.data = (void *)BMA254
+	},
+	{
+		.compatible = "bosch,smb380",
+		.data = (void *)BMA150
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, bma180_of_match);
+
+static struct i2c_driver bma180_driver = {
+	.driver = {
+		.name	= "bma180",
+		.pm	= BMA180_PM_OPS,
+		.of_match_table = bma180_of_match,
+	},
+	.probe		= bma180_probe,
+	.remove		= bma180_remove,
+	.id_table	= bma180_ids,
+};
+
+module_i2c_driver(bma180_driver);
+
+MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>");
+MODULE_AUTHOR("Texas Instruments, Inc.");
+MODULE_DESCRIPTION("Bosch BMA023/BMA1x0/BMA25x triaxial acceleration sensor");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/bma220_spi.c b/drivers/iio/accel/bma220_spi.c
new file mode 100644
index 000000000..e8a9db1a8
--- /dev/null
+++ b/drivers/iio/accel/bma220_spi.c
@@ -0,0 +1,336 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**
+ * BMA220 Digital triaxial acceleration sensor driver
+ *
+ * Copyright (c) 2016,2020 Intel Corporation.
+ */
+
+#include <linux/bits.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+
+#include <linux/iio/buffer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define BMA220_REG_ID				0x00
+#define BMA220_REG_ACCEL_X			0x02
+#define BMA220_REG_ACCEL_Y			0x03
+#define BMA220_REG_ACCEL_Z			0x04
+#define BMA220_REG_RANGE			0x11
+#define BMA220_REG_SUSPEND			0x18
+
+#define BMA220_CHIP_ID				0xDD
+#define BMA220_READ_MASK			BIT(7)
+#define BMA220_RANGE_MASK			GENMASK(1, 0)
+#define BMA220_DATA_SHIFT			2
+#define BMA220_SUSPEND_SLEEP			0xFF
+#define BMA220_SUSPEND_WAKE			0x00
+
+#define BMA220_DEVICE_NAME			"bma220"
+
+#define BMA220_ACCEL_CHANNEL(index, reg, axis) {			\
+	.type = IIO_ACCEL,						\
+	.address = reg,							\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),		\
+	.scan_index = index,						\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 6,						\
+		.storagebits = 8,					\
+		.shift = BMA220_DATA_SHIFT,				\
+		.endianness = IIO_CPU,					\
+	},								\
+}
+
+enum bma220_axis {
+	AXIS_X,
+	AXIS_Y,
+	AXIS_Z,
+};
+
+static const int bma220_scale_table[][2] = {
+	{0, 623000}, {1, 248000}, {2, 491000}, {4, 983000},
+};
+
+struct bma220_data {
+	struct spi_device *spi_device;
+	struct mutex lock;
+	struct {
+		s8 chans[3];
+		/* Ensure timestamp is naturally aligned. */
+		s64 timestamp __aligned(8);
+	} scan;
+	u8 tx_buf[2] ____cacheline_aligned;
+};
+
+static const struct iio_chan_spec bma220_channels[] = {
+	BMA220_ACCEL_CHANNEL(0, BMA220_REG_ACCEL_X, X),
+	BMA220_ACCEL_CHANNEL(1, BMA220_REG_ACCEL_Y, Y),
+	BMA220_ACCEL_CHANNEL(2, BMA220_REG_ACCEL_Z, Z),
+	IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static inline int bma220_read_reg(struct spi_device *spi, u8 reg)
+{
+	return spi_w8r8(spi, reg | BMA220_READ_MASK);
+}
+
+static const unsigned long bma220_accel_scan_masks[] = {
+	BIT(AXIS_X) | BIT(AXIS_Y) | BIT(AXIS_Z),
+	0
+};
+
+static irqreturn_t bma220_trigger_handler(int irq, void *p)
+{
+	int ret;
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct bma220_data *data = iio_priv(indio_dev);
+	struct spi_device *spi = data->spi_device;
+
+	mutex_lock(&data->lock);
+	data->tx_buf[0] = BMA220_REG_ACCEL_X | BMA220_READ_MASK;
+	ret = spi_write_then_read(spi, data->tx_buf, 1, &data->scan.chans,
+				  ARRAY_SIZE(bma220_channels) - 1);
+	if (ret < 0)
+		goto err;
+
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+					   pf->timestamp);
+err:
+	mutex_unlock(&data->lock);
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int bma220_read_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan,
+			   int *val, int *val2, long mask)
+{
+	int ret;
+	u8 range_idx;
+	struct bma220_data *data = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = bma220_read_reg(data->spi_device, chan->address);
+		if (ret < 0)
+			return -EINVAL;
+		*val = sign_extend32(ret >> BMA220_DATA_SHIFT, 5);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		ret = bma220_read_reg(data->spi_device, BMA220_REG_RANGE);
+		if (ret < 0)
+			return ret;
+		range_idx = ret & BMA220_RANGE_MASK;
+		*val = bma220_scale_table[range_idx][0];
+		*val2 = bma220_scale_table[range_idx][1];
+		return IIO_VAL_INT_PLUS_MICRO;
+	}
+
+	return -EINVAL;
+}
+
+static int bma220_write_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int val, int val2, long mask)
+{
+	int i;
+	int ret;
+	int index = -1;
+	struct bma220_data *data = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		for (i = 0; i < ARRAY_SIZE(bma220_scale_table); i++)
+			if (val == bma220_scale_table[i][0] &&
+			    val2 == bma220_scale_table[i][1]) {
+				index = i;
+				break;
+			}
+		if (index < 0)
+			return -EINVAL;
+
+		mutex_lock(&data->lock);
+		data->tx_buf[0] = BMA220_REG_RANGE;
+		data->tx_buf[1] = index;
+		ret = spi_write(data->spi_device, data->tx_buf,
+				sizeof(data->tx_buf));
+		if (ret < 0)
+			dev_err(&data->spi_device->dev,
+				"failed to set measurement range\n");
+		mutex_unlock(&data->lock);
+
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static int bma220_read_avail(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     const int **vals, int *type, int *length,
+			     long mask)
+{
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		*vals = (int *)bma220_scale_table;
+		*type = IIO_VAL_INT_PLUS_MICRO;
+		*length = ARRAY_SIZE(bma220_scale_table) * 2;
+		return IIO_AVAIL_LIST;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info bma220_info = {
+	.read_raw		= bma220_read_raw,
+	.write_raw		= bma220_write_raw,
+	.read_avail		= bma220_read_avail,
+};
+
+static int bma220_init(struct spi_device *spi)
+{
+	int ret;
+
+	ret = bma220_read_reg(spi, BMA220_REG_ID);
+	if (ret != BMA220_CHIP_ID)
+		return -ENODEV;
+
+	/* Make sure the chip is powered on */
+	ret = bma220_read_reg(spi, BMA220_REG_SUSPEND);
+	if (ret == BMA220_SUSPEND_WAKE)
+		ret = bma220_read_reg(spi, BMA220_REG_SUSPEND);
+	if (ret < 0)
+		return ret;
+	if (ret == BMA220_SUSPEND_WAKE)
+		return -EBUSY;
+
+	return 0;
+}
+
+static int bma220_deinit(struct spi_device *spi)
+{
+	int ret;
+
+	/* Make sure the chip is powered off */
+	ret = bma220_read_reg(spi, BMA220_REG_SUSPEND);
+	if (ret == BMA220_SUSPEND_SLEEP)
+		ret = bma220_read_reg(spi, BMA220_REG_SUSPEND);
+	if (ret < 0)
+		return ret;
+	if (ret == BMA220_SUSPEND_SLEEP)
+		return -EBUSY;
+
+	return 0;
+}
+
+static int bma220_probe(struct spi_device *spi)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct bma220_data *data;
+
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*data));
+	if (!indio_dev) {
+		dev_err(&spi->dev, "iio allocation failed!\n");
+		return -ENOMEM;
+	}
+
+	data = iio_priv(indio_dev);
+	data->spi_device = spi;
+	spi_set_drvdata(spi, indio_dev);
+	mutex_init(&data->lock);
+
+	indio_dev->info = &bma220_info;
+	indio_dev->name = BMA220_DEVICE_NAME;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = bma220_channels;
+	indio_dev->num_channels = ARRAY_SIZE(bma220_channels);
+	indio_dev->available_scan_masks = bma220_accel_scan_masks;
+
+	ret = bma220_init(data->spi_device);
+	if (ret)
+		return ret;
+
+	ret = iio_triggered_buffer_setup(indio_dev, iio_pollfunc_store_time,
+					 bma220_trigger_handler, NULL);
+	if (ret < 0) {
+		dev_err(&spi->dev, "iio triggered buffer setup failed\n");
+		goto err_suspend;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&spi->dev, "iio_device_register failed\n");
+		iio_triggered_buffer_cleanup(indio_dev);
+		goto err_suspend;
+	}
+
+	return 0;
+
+err_suspend:
+	return bma220_deinit(spi);
+}
+
+static int bma220_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+
+	iio_device_unregister(indio_dev);
+	iio_triggered_buffer_cleanup(indio_dev);
+
+	return bma220_deinit(spi);
+}
+
+static __maybe_unused int bma220_suspend(struct device *dev)
+{
+	struct bma220_data *data = iio_priv(dev_get_drvdata(dev));
+
+	/* The chip can be suspended/woken up by a simple register read. */
+	return bma220_read_reg(data->spi_device, BMA220_REG_SUSPEND);
+}
+
+static __maybe_unused int bma220_resume(struct device *dev)
+{
+	struct bma220_data *data = iio_priv(dev_get_drvdata(dev));
+
+	return bma220_read_reg(data->spi_device, BMA220_REG_SUSPEND);
+}
+static SIMPLE_DEV_PM_OPS(bma220_pm_ops, bma220_suspend, bma220_resume);
+
+static const struct spi_device_id bma220_spi_id[] = {
+	{"bma220", 0},
+	{}
+};
+
+static const struct acpi_device_id bma220_acpi_id[] = {
+	{"BMA0220", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(spi, bma220_spi_id);
+
+static struct spi_driver bma220_driver = {
+	.driver = {
+		.name = "bma220_spi",
+		.pm = &bma220_pm_ops,
+		.acpi_match_table = bma220_acpi_id,
+	},
+	.probe =            bma220_probe,
+	.remove =           bma220_remove,
+	.id_table =         bma220_spi_id,
+};
+module_spi_driver(bma220_driver);
+
+MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>");
+MODULE_DESCRIPTION("BMA220 acceleration sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/bma400.h b/drivers/iio/accel/bma400.h
new file mode 100644
index 000000000..416090c6b
--- /dev/null
+++ b/drivers/iio/accel/bma400.h
@@ -0,0 +1,118 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Register constants and other forward declarations needed by the bma400
+ * sources.
+ *
+ * Copyright 2019 Dan Robertson <dan@dlrobertson.com>
+ */
+
+#ifndef _BMA400_H_
+#define _BMA400_H_
+
+#include <linux/bits.h>
+#include <linux/regmap.h>
+
+/*
+ * Read-Only Registers
+ */
+
+/* Status and ID registers */
+#define BMA400_CHIP_ID_REG          0x00
+#define BMA400_ERR_REG              0x02
+#define BMA400_STATUS_REG           0x03
+
+/* Acceleration registers */
+#define BMA400_X_AXIS_LSB_REG       0x04
+#define BMA400_X_AXIS_MSB_REG       0x05
+#define BMA400_Y_AXIS_LSB_REG       0x06
+#define BMA400_Y_AXIS_MSB_REG       0x07
+#define BMA400_Z_AXIS_LSB_REG       0x08
+#define BMA400_Z_AXIS_MSB_REG       0x09
+
+/* Sensor time registers */
+#define BMA400_SENSOR_TIME0         0x0a
+#define BMA400_SENSOR_TIME1         0x0b
+#define BMA400_SENSOR_TIME2         0x0c
+
+/* Event and interrupt registers */
+#define BMA400_EVENT_REG            0x0d
+#define BMA400_INT_STAT0_REG        0x0e
+#define BMA400_INT_STAT1_REG        0x0f
+#define BMA400_INT_STAT2_REG        0x10
+
+/* Temperature register */
+#define BMA400_TEMP_DATA_REG        0x11
+
+/* FIFO length and data registers */
+#define BMA400_FIFO_LENGTH0_REG     0x12
+#define BMA400_FIFO_LENGTH1_REG     0x13
+#define BMA400_FIFO_DATA_REG        0x14
+
+/* Step count registers */
+#define BMA400_STEP_CNT0_REG        0x15
+#define BMA400_STEP_CNT1_REG        0x16
+#define BMA400_STEP_CNT3_REG        0x17
+#define BMA400_STEP_STAT_REG        0x18
+
+/*
+ * Read-write configuration registers
+ */
+#define BMA400_ACC_CONFIG0_REG      0x19
+#define BMA400_ACC_CONFIG1_REG      0x1a
+#define BMA400_ACC_CONFIG2_REG      0x1b
+#define BMA400_CMD_REG              0x7e
+
+/* Chip ID of BMA 400 devices found in the chip ID register. */
+#define BMA400_ID_REG_VAL           0x90
+
+#define BMA400_LP_OSR_SHIFT         5
+#define BMA400_NP_OSR_SHIFT         4
+#define BMA400_SCALE_SHIFT          6
+
+#define BMA400_TWO_BITS_MASK        GENMASK(1, 0)
+#define BMA400_LP_OSR_MASK          GENMASK(6, 5)
+#define BMA400_NP_OSR_MASK          GENMASK(5, 4)
+#define BMA400_ACC_ODR_MASK         GENMASK(3, 0)
+#define BMA400_ACC_SCALE_MASK       GENMASK(7, 6)
+
+#define BMA400_ACC_ODR_MIN_RAW      0x05
+#define BMA400_ACC_ODR_LP_RAW       0x06
+#define BMA400_ACC_ODR_MAX_RAW      0x0b
+
+#define BMA400_ACC_ODR_MAX_HZ       800
+#define BMA400_ACC_ODR_MIN_WHOLE_HZ 25
+#define BMA400_ACC_ODR_MIN_HZ       12
+
+/*
+ * BMA400_SCALE_MIN macro value represents m/s^2 for 1 LSB before
+ * converting to micro values for +-2g range.
+ *
+ * For +-2g - 1 LSB = 0.976562 milli g = 0.009576 m/s^2
+ * For +-4g - 1 LSB = 1.953125 milli g = 0.019153 m/s^2
+ * For +-16g - 1 LSB = 7.8125 milli g = 0.076614 m/s^2
+ *
+ * The raw value which is used to select the different ranges is determined
+ * by the first bit set position from the scale value, so BMA400_SCALE_MIN
+ * should be odd.
+ *
+ * Scale values for +-2g, +-4g, +-8g and +-16g are populated into bma400_scales
+ * array by left shifting BMA400_SCALE_MIN.
+ * e.g.:
+ * To select +-2g = 9577 << 0 = raw value to write is 0.
+ * To select +-8g = 9577 << 2 = raw value to write is 2.
+ * To select +-16g = 9577 << 3 = raw value to write is 3.
+ */
+#define BMA400_SCALE_MIN            9577
+#define BMA400_SCALE_MAX            76617
+
+#define BMA400_NUM_REGULATORS       2
+#define BMA400_VDD_REGULATOR        0
+#define BMA400_VDDIO_REGULATOR      1
+
+extern const struct regmap_config bma400_regmap_config;
+
+int bma400_probe(struct device *dev, struct regmap *regmap, const char *name);
+
+int bma400_remove(struct device *dev);
+
+#endif
diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c
new file mode 100644
index 000000000..58aa6a0e1
--- /dev/null
+++ b/drivers/iio/accel/bma400_core.c
@@ -0,0 +1,852 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Core IIO driver for Bosch BMA400 triaxial acceleration sensor.
+ *
+ * Copyright 2019 Dan Robertson <dan@dlrobertson.com>
+ *
+ * TODO:
+ *  - Support for power management
+ *  - Support events and interrupts
+ *  - Create channel for step count
+ *  - Create channel for sensor time
+ */
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#include <linux/iio/iio.h>
+
+#include "bma400.h"
+
+/*
+ * The G-range selection may be one of 2g, 4g, 8, or 16g. The scale may
+ * be selected with the acc_range bits of the ACC_CONFIG1 register.
+ * NB: This buffer is populated in the device init.
+ */
+static int bma400_scales[8];
+
+/*
+ * See the ACC_CONFIG1 section of the datasheet.
+ * NB: This buffer is populated in the device init.
+ */
+static int bma400_sample_freqs[14];
+
+static const int bma400_osr_range[] = { 0, 1, 3 };
+
+/* See the ACC_CONFIG0 section of the datasheet */
+enum bma400_power_mode {
+	POWER_MODE_SLEEP   = 0x00,
+	POWER_MODE_LOW     = 0x01,
+	POWER_MODE_NORMAL  = 0x02,
+	POWER_MODE_INVALID = 0x03,
+};
+
+struct bma400_sample_freq {
+	int hz;
+	int uhz;
+};
+
+struct bma400_data {
+	struct device *dev;
+	struct regmap *regmap;
+	struct regulator_bulk_data regulators[BMA400_NUM_REGULATORS];
+	struct mutex mutex; /* data register lock */
+	struct iio_mount_matrix orientation;
+	enum bma400_power_mode power_mode;
+	struct bma400_sample_freq sample_freq;
+	int oversampling_ratio;
+	int scale;
+};
+
+static bool bma400_is_writable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case BMA400_CHIP_ID_REG:
+	case BMA400_ERR_REG:
+	case BMA400_STATUS_REG:
+	case BMA400_X_AXIS_LSB_REG:
+	case BMA400_X_AXIS_MSB_REG:
+	case BMA400_Y_AXIS_LSB_REG:
+	case BMA400_Y_AXIS_MSB_REG:
+	case BMA400_Z_AXIS_LSB_REG:
+	case BMA400_Z_AXIS_MSB_REG:
+	case BMA400_SENSOR_TIME0:
+	case BMA400_SENSOR_TIME1:
+	case BMA400_SENSOR_TIME2:
+	case BMA400_EVENT_REG:
+	case BMA400_INT_STAT0_REG:
+	case BMA400_INT_STAT1_REG:
+	case BMA400_INT_STAT2_REG:
+	case BMA400_TEMP_DATA_REG:
+	case BMA400_FIFO_LENGTH0_REG:
+	case BMA400_FIFO_LENGTH1_REG:
+	case BMA400_FIFO_DATA_REG:
+	case BMA400_STEP_CNT0_REG:
+	case BMA400_STEP_CNT1_REG:
+	case BMA400_STEP_CNT3_REG:
+	case BMA400_STEP_STAT_REG:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static bool bma400_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case BMA400_ERR_REG:
+	case BMA400_STATUS_REG:
+	case BMA400_X_AXIS_LSB_REG:
+	case BMA400_X_AXIS_MSB_REG:
+	case BMA400_Y_AXIS_LSB_REG:
+	case BMA400_Y_AXIS_MSB_REG:
+	case BMA400_Z_AXIS_LSB_REG:
+	case BMA400_Z_AXIS_MSB_REG:
+	case BMA400_SENSOR_TIME0:
+	case BMA400_SENSOR_TIME1:
+	case BMA400_SENSOR_TIME2:
+	case BMA400_EVENT_REG:
+	case BMA400_INT_STAT0_REG:
+	case BMA400_INT_STAT1_REG:
+	case BMA400_INT_STAT2_REG:
+	case BMA400_TEMP_DATA_REG:
+	case BMA400_FIFO_LENGTH0_REG:
+	case BMA400_FIFO_LENGTH1_REG:
+	case BMA400_FIFO_DATA_REG:
+	case BMA400_STEP_CNT0_REG:
+	case BMA400_STEP_CNT1_REG:
+	case BMA400_STEP_CNT3_REG:
+	case BMA400_STEP_STAT_REG:
+		return true;
+	default:
+		return false;
+	}
+}
+
+const struct regmap_config bma400_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = BMA400_CMD_REG,
+	.cache_type = REGCACHE_RBTREE,
+	.writeable_reg = bma400_is_writable_reg,
+	.volatile_reg = bma400_is_volatile_reg,
+};
+EXPORT_SYMBOL(bma400_regmap_config);
+
+static const struct iio_mount_matrix *
+bma400_accel_get_mount_matrix(const struct iio_dev *indio_dev,
+			      const struct iio_chan_spec *chan)
+{
+	struct bma400_data *data = iio_priv(indio_dev);
+
+	return &data->orientation;
+}
+
+static const struct iio_chan_spec_ext_info bma400_ext_info[] = {
+	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma400_accel_get_mount_matrix),
+	{ }
+};
+
+#define BMA400_ACC_CHANNEL(_axis) { \
+	.type = IIO_ACCEL, \
+	.modified = 1, \
+	.channel2 = IIO_MOD_##_axis, \
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
+		BIT(IIO_CHAN_INFO_SCALE) | \
+		BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \
+	.info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
+		BIT(IIO_CHAN_INFO_SCALE) | \
+		BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \
+	.ext_info = bma400_ext_info, \
+}
+
+static const struct iio_chan_spec bma400_channels[] = {
+	BMA400_ACC_CHANNEL(X),
+	BMA400_ACC_CHANNEL(Y),
+	BMA400_ACC_CHANNEL(Z),
+	{
+		.type = IIO_TEMP,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+	},
+};
+
+static int bma400_get_temp_reg(struct bma400_data *data, int *val, int *val2)
+{
+	unsigned int raw_temp;
+	int host_temp;
+	int ret;
+
+	if (data->power_mode == POWER_MODE_SLEEP)
+		return -EBUSY;
+
+	ret = regmap_read(data->regmap, BMA400_TEMP_DATA_REG, &raw_temp);
+	if (ret)
+		return ret;
+
+	host_temp = sign_extend32(raw_temp, 7);
+	/*
+	 * The formula for the TEMP_DATA register in the datasheet
+	 * is: x * 0.5 + 23
+	 */
+	*val = (host_temp >> 1) + 23;
+	*val2 = (host_temp & 0x1) * 500000;
+	return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int bma400_get_accel_reg(struct bma400_data *data,
+				const struct iio_chan_spec *chan,
+				int *val)
+{
+	__le16 raw_accel;
+	int lsb_reg;
+	int ret;
+
+	if (data->power_mode == POWER_MODE_SLEEP)
+		return -EBUSY;
+
+	switch (chan->channel2) {
+	case IIO_MOD_X:
+		lsb_reg = BMA400_X_AXIS_LSB_REG;
+		break;
+	case IIO_MOD_Y:
+		lsb_reg = BMA400_Y_AXIS_LSB_REG;
+		break;
+	case IIO_MOD_Z:
+		lsb_reg = BMA400_Z_AXIS_LSB_REG;
+		break;
+	default:
+		dev_err(data->dev, "invalid axis channel modifier\n");
+		return -EINVAL;
+	}
+
+	/* bulk read two registers, with the base being the LSB register */
+	ret = regmap_bulk_read(data->regmap, lsb_reg, &raw_accel,
+			       sizeof(raw_accel));
+	if (ret)
+		return ret;
+
+	*val = sign_extend32(le16_to_cpu(raw_accel), 11);
+	return IIO_VAL_INT;
+}
+
+static void bma400_output_data_rate_from_raw(int raw, unsigned int *val,
+					     unsigned int *val2)
+{
+	*val = BMA400_ACC_ODR_MAX_HZ >> (BMA400_ACC_ODR_MAX_RAW - raw);
+	if (raw > BMA400_ACC_ODR_MIN_RAW)
+		*val2 = 0;
+	else
+		*val2 = 500000;
+}
+
+static int bma400_get_accel_output_data_rate(struct bma400_data *data)
+{
+	unsigned int val;
+	unsigned int odr;
+	int ret;
+
+	switch (data->power_mode) {
+	case POWER_MODE_LOW:
+		/*
+		 * Runs at a fixed rate in low-power mode. See section 4.3
+		 * in the datasheet.
+		 */
+		bma400_output_data_rate_from_raw(BMA400_ACC_ODR_LP_RAW,
+						 &data->sample_freq.hz,
+						 &data->sample_freq.uhz);
+		return 0;
+	case POWER_MODE_NORMAL:
+		/*
+		 * In normal mode the ODR can be found in the ACC_CONFIG1
+		 * register.
+		 */
+		ret = regmap_read(data->regmap, BMA400_ACC_CONFIG1_REG, &val);
+		if (ret)
+			goto error;
+
+		odr = val & BMA400_ACC_ODR_MASK;
+		if (odr < BMA400_ACC_ODR_MIN_RAW ||
+		    odr > BMA400_ACC_ODR_MAX_RAW) {
+			ret = -EINVAL;
+			goto error;
+		}
+
+		bma400_output_data_rate_from_raw(odr, &data->sample_freq.hz,
+						 &data->sample_freq.uhz);
+		return 0;
+	case POWER_MODE_SLEEP:
+		data->sample_freq.hz = 0;
+		data->sample_freq.uhz = 0;
+		return 0;
+	default:
+		ret = 0;
+		goto error;
+	}
+error:
+	data->sample_freq.hz = -1;
+	data->sample_freq.uhz = -1;
+	return ret;
+}
+
+static int bma400_set_accel_output_data_rate(struct bma400_data *data,
+					     int hz, int uhz)
+{
+	unsigned int idx;
+	unsigned int odr;
+	unsigned int val;
+	int ret;
+
+	if (hz >= BMA400_ACC_ODR_MIN_WHOLE_HZ) {
+		if (uhz || hz > BMA400_ACC_ODR_MAX_HZ)
+			return -EINVAL;
+
+		/* Note this works because MIN_WHOLE_HZ is odd */
+		idx = __ffs(hz);
+
+		if (hz >> idx != BMA400_ACC_ODR_MIN_WHOLE_HZ)
+			return -EINVAL;
+
+		idx += BMA400_ACC_ODR_MIN_RAW + 1;
+	} else if (hz == BMA400_ACC_ODR_MIN_HZ && uhz == 500000) {
+		idx = BMA400_ACC_ODR_MIN_RAW;
+	} else {
+		return -EINVAL;
+	}
+
+	ret = regmap_read(data->regmap, BMA400_ACC_CONFIG1_REG, &val);
+	if (ret)
+		return ret;
+
+	/* preserve the range and normal mode osr */
+	odr = (~BMA400_ACC_ODR_MASK & val) | idx;
+
+	ret = regmap_write(data->regmap, BMA400_ACC_CONFIG1_REG, odr);
+	if (ret)
+		return ret;
+
+	bma400_output_data_rate_from_raw(idx, &data->sample_freq.hz,
+					 &data->sample_freq.uhz);
+	return 0;
+}
+
+static int bma400_get_accel_oversampling_ratio(struct bma400_data *data)
+{
+	unsigned int val;
+	unsigned int osr;
+	int ret;
+
+	/*
+	 * The oversampling ratio is stored in a different register
+	 * based on the power-mode. In normal mode the OSR is stored
+	 * in ACC_CONFIG1. In low-power mode it is stored in
+	 * ACC_CONFIG0.
+	 */
+	switch (data->power_mode) {
+	case POWER_MODE_LOW:
+		ret = regmap_read(data->regmap, BMA400_ACC_CONFIG0_REG, &val);
+		if (ret) {
+			data->oversampling_ratio = -1;
+			return ret;
+		}
+
+		osr = (val & BMA400_LP_OSR_MASK) >> BMA400_LP_OSR_SHIFT;
+
+		data->oversampling_ratio = osr;
+		return 0;
+	case POWER_MODE_NORMAL:
+		ret = regmap_read(data->regmap, BMA400_ACC_CONFIG1_REG, &val);
+		if (ret) {
+			data->oversampling_ratio = -1;
+			return ret;
+		}
+
+		osr = (val & BMA400_NP_OSR_MASK) >> BMA400_NP_OSR_SHIFT;
+
+		data->oversampling_ratio = osr;
+		return 0;
+	case POWER_MODE_SLEEP:
+		data->oversampling_ratio = 0;
+		return 0;
+	default:
+		data->oversampling_ratio = -1;
+		return -EINVAL;
+	}
+}
+
+static int bma400_set_accel_oversampling_ratio(struct bma400_data *data,
+					       int val)
+{
+	unsigned int acc_config;
+	int ret;
+
+	if (val & ~BMA400_TWO_BITS_MASK)
+		return -EINVAL;
+
+	/*
+	 * The oversampling ratio is stored in a different register
+	 * based on the power-mode.
+	 */
+	switch (data->power_mode) {
+	case POWER_MODE_LOW:
+		ret = regmap_read(data->regmap, BMA400_ACC_CONFIG0_REG,
+				  &acc_config);
+		if (ret)
+			return ret;
+
+		ret = regmap_write(data->regmap, BMA400_ACC_CONFIG0_REG,
+				   (acc_config & ~BMA400_LP_OSR_MASK) |
+				   (val << BMA400_LP_OSR_SHIFT));
+		if (ret) {
+			dev_err(data->dev, "Failed to write out OSR\n");
+			return ret;
+		}
+
+		data->oversampling_ratio = val;
+		return 0;
+	case POWER_MODE_NORMAL:
+		ret = regmap_read(data->regmap, BMA400_ACC_CONFIG1_REG,
+				  &acc_config);
+		if (ret)
+			return ret;
+
+		ret = regmap_write(data->regmap, BMA400_ACC_CONFIG1_REG,
+				   (acc_config & ~BMA400_NP_OSR_MASK) |
+				   (val << BMA400_NP_OSR_SHIFT));
+		if (ret) {
+			dev_err(data->dev, "Failed to write out OSR\n");
+			return ret;
+		}
+
+		data->oversampling_ratio = val;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+	return ret;
+}
+
+static int bma400_accel_scale_to_raw(struct bma400_data *data,
+				     unsigned int val)
+{
+	int raw;
+
+	if (val == 0)
+		return -EINVAL;
+
+	/* Note this works because BMA400_SCALE_MIN is odd */
+	raw = __ffs(val);
+
+	if (val >> raw != BMA400_SCALE_MIN)
+		return -EINVAL;
+
+	return raw;
+}
+
+static int bma400_get_accel_scale(struct bma400_data *data)
+{
+	unsigned int raw_scale;
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(data->regmap, BMA400_ACC_CONFIG1_REG, &val);
+	if (ret)
+		return ret;
+
+	raw_scale = (val & BMA400_ACC_SCALE_MASK) >> BMA400_SCALE_SHIFT;
+	if (raw_scale > BMA400_TWO_BITS_MASK)
+		return -EINVAL;
+
+	data->scale = BMA400_SCALE_MIN << raw_scale;
+
+	return 0;
+}
+
+static int bma400_set_accel_scale(struct bma400_data *data, unsigned int val)
+{
+	unsigned int acc_config;
+	int raw;
+	int ret;
+
+	ret = regmap_read(data->regmap, BMA400_ACC_CONFIG1_REG, &acc_config);
+	if (ret)
+		return ret;
+
+	raw = bma400_accel_scale_to_raw(data, val);
+	if (raw < 0)
+		return raw;
+
+	ret = regmap_write(data->regmap, BMA400_ACC_CONFIG1_REG,
+			   (acc_config & ~BMA400_ACC_SCALE_MASK) |
+			   (raw << BMA400_SCALE_SHIFT));
+	if (ret)
+		return ret;
+
+	data->scale = val;
+	return 0;
+}
+
+static int bma400_get_power_mode(struct bma400_data *data)
+{
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(data->regmap, BMA400_STATUS_REG, &val);
+	if (ret) {
+		dev_err(data->dev, "Failed to read status register\n");
+		return ret;
+	}
+
+	data->power_mode = (val >> 1) & BMA400_TWO_BITS_MASK;
+	return 0;
+}
+
+static int bma400_set_power_mode(struct bma400_data *data,
+				 enum bma400_power_mode mode)
+{
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(data->regmap, BMA400_ACC_CONFIG0_REG, &val);
+	if (ret)
+		return ret;
+
+	if (data->power_mode == mode)
+		return 0;
+
+	if (mode == POWER_MODE_INVALID)
+		return -EINVAL;
+
+	/* Preserve the low-power oversample ratio etc */
+	ret = regmap_write(data->regmap, BMA400_ACC_CONFIG0_REG,
+			   mode | (val & ~BMA400_TWO_BITS_MASK));
+	if (ret) {
+		dev_err(data->dev, "Failed to write to power-mode\n");
+		return ret;
+	}
+
+	data->power_mode = mode;
+
+	/*
+	 * Update our cached osr and odr based on the new
+	 * power-mode.
+	 */
+	bma400_get_accel_output_data_rate(data);
+	bma400_get_accel_oversampling_ratio(data);
+	return 0;
+}
+
+static void bma400_init_tables(void)
+{
+	int raw;
+	int i;
+
+	for (i = 0; i + 1 < ARRAY_SIZE(bma400_sample_freqs); i += 2) {
+		raw = (i / 2) + 5;
+		bma400_output_data_rate_from_raw(raw, &bma400_sample_freqs[i],
+						 &bma400_sample_freqs[i + 1]);
+	}
+
+	for (i = 0; i + 1 < ARRAY_SIZE(bma400_scales); i += 2) {
+		raw = i / 2;
+		bma400_scales[i] = 0;
+		bma400_scales[i + 1] = BMA400_SCALE_MIN << raw;
+	}
+}
+
+static int bma400_init(struct bma400_data *data)
+{
+	unsigned int val;
+	int ret;
+
+	/* Try to read chip_id register. It must return 0x90. */
+	ret = regmap_read(data->regmap, BMA400_CHIP_ID_REG, &val);
+	if (ret) {
+		dev_err(data->dev, "Failed to read chip id register\n");
+		goto out;
+	}
+
+	if (val != BMA400_ID_REG_VAL) {
+		dev_err(data->dev, "Chip ID mismatch\n");
+		ret = -ENODEV;
+		goto out;
+	}
+
+	data->regulators[BMA400_VDD_REGULATOR].supply = "vdd";
+	data->regulators[BMA400_VDDIO_REGULATOR].supply = "vddio";
+	ret = devm_regulator_bulk_get(data->dev,
+				      ARRAY_SIZE(data->regulators),
+				      data->regulators);
+	if (ret) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(data->dev,
+				"Failed to get regulators: %d\n",
+				ret);
+
+		goto out;
+	}
+	ret = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
+				    data->regulators);
+	if (ret) {
+		dev_err(data->dev, "Failed to enable regulators: %d\n",
+			ret);
+		goto out;
+	}
+
+	ret = bma400_get_power_mode(data);
+	if (ret) {
+		dev_err(data->dev, "Failed to get the initial power-mode\n");
+		goto err_reg_disable;
+	}
+
+	if (data->power_mode != POWER_MODE_NORMAL) {
+		ret = bma400_set_power_mode(data, POWER_MODE_NORMAL);
+		if (ret) {
+			dev_err(data->dev, "Failed to wake up the device\n");
+			goto err_reg_disable;
+		}
+		/*
+		 * TODO: The datasheet waits 1500us here in the example, but
+		 * lists 2/ODR as the wakeup time.
+		 */
+		usleep_range(1500, 2000);
+	}
+
+	bma400_init_tables();
+
+	ret = bma400_get_accel_output_data_rate(data);
+	if (ret)
+		goto err_reg_disable;
+
+	ret = bma400_get_accel_oversampling_ratio(data);
+	if (ret)
+		goto err_reg_disable;
+
+	ret = bma400_get_accel_scale(data);
+	if (ret)
+		goto err_reg_disable;
+
+	/*
+	 * Once the interrupt engine is supported we might use the
+	 * data_src_reg, but for now ensure this is set to the
+	 * variable ODR filter selectable by the sample frequency
+	 * channel.
+	 */
+	return regmap_write(data->regmap, BMA400_ACC_CONFIG2_REG, 0x00);
+
+err_reg_disable:
+	regulator_bulk_disable(ARRAY_SIZE(data->regulators),
+			       data->regulators);
+out:
+	return ret;
+}
+
+static int bma400_read_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan, int *val,
+			   int *val2, long mask)
+{
+	struct bma400_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_PROCESSED:
+		mutex_lock(&data->mutex);
+		ret = bma400_get_temp_reg(data, val, val2);
+		mutex_unlock(&data->mutex);
+		return ret;
+	case IIO_CHAN_INFO_RAW:
+		mutex_lock(&data->mutex);
+		ret = bma400_get_accel_reg(data, chan, val);
+		mutex_unlock(&data->mutex);
+		return ret;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			if (data->sample_freq.hz < 0)
+				return -EINVAL;
+
+			*val = data->sample_freq.hz;
+			*val2 = data->sample_freq.uhz;
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_TEMP:
+			/*
+			 * Runs at a fixed sampling frequency. See Section 4.4
+			 * of the datasheet.
+			 */
+			*val = 6;
+			*val2 = 250000;
+			return IIO_VAL_INT_PLUS_MICRO;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = data->scale;
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
+		/*
+		 * TODO: We could avoid this logic and returning -EINVAL here if
+		 * we set both the low-power and normal mode OSR registers when
+		 * we configure the device.
+		 */
+		if (data->oversampling_ratio < 0)
+			return -EINVAL;
+
+		*val = data->oversampling_ratio;
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int bma400_read_avail(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     const int **vals, int *type, int *length,
+			     long mask)
+{
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		*type = IIO_VAL_INT_PLUS_MICRO;
+		*vals = bma400_scales;
+		*length = ARRAY_SIZE(bma400_scales);
+		return IIO_AVAIL_LIST;
+	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
+		*type = IIO_VAL_INT;
+		*vals = bma400_osr_range;
+		*length = ARRAY_SIZE(bma400_osr_range);
+		return IIO_AVAIL_RANGE;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		*type = IIO_VAL_INT_PLUS_MICRO;
+		*vals = bma400_sample_freqs;
+		*length = ARRAY_SIZE(bma400_sample_freqs);
+		return IIO_AVAIL_LIST;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int bma400_write_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan, int val, int val2,
+			    long mask)
+{
+	struct bma400_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		/*
+		 * The sample frequency is readonly for the temperature
+		 * register and a fixed value in low-power mode.
+		 */
+		if (chan->type != IIO_ACCEL)
+			return -EINVAL;
+
+		mutex_lock(&data->mutex);
+		ret = bma400_set_accel_output_data_rate(data, val, val2);
+		mutex_unlock(&data->mutex);
+		return ret;
+	case IIO_CHAN_INFO_SCALE:
+		if (val != 0 ||
+		    val2 < BMA400_SCALE_MIN || val2 > BMA400_SCALE_MAX)
+			return -EINVAL;
+
+		mutex_lock(&data->mutex);
+		ret = bma400_set_accel_scale(data, val2);
+		mutex_unlock(&data->mutex);
+		return ret;
+	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
+		mutex_lock(&data->mutex);
+		ret = bma400_set_accel_oversampling_ratio(data, val);
+		mutex_unlock(&data->mutex);
+		return ret;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int bma400_write_raw_get_fmt(struct iio_dev *indio_dev,
+				    struct iio_chan_spec const *chan,
+				    long mask)
+{
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_SCALE:
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info bma400_info = {
+	.read_raw          = bma400_read_raw,
+	.read_avail        = bma400_read_avail,
+	.write_raw         = bma400_write_raw,
+	.write_raw_get_fmt = bma400_write_raw_get_fmt,
+};
+
+int bma400_probe(struct device *dev, struct regmap *regmap, const char *name)
+{
+	struct iio_dev *indio_dev;
+	struct bma400_data *data;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	data->regmap = regmap;
+	data->dev = dev;
+
+	ret = bma400_init(data);
+	if (ret)
+		return ret;
+
+	ret = iio_read_mount_matrix(dev, "mount-matrix", &data->orientation);
+	if (ret)
+		return ret;
+
+	mutex_init(&data->mutex);
+	indio_dev->name = name;
+	indio_dev->info = &bma400_info;
+	indio_dev->channels = bma400_channels;
+	indio_dev->num_channels = ARRAY_SIZE(bma400_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	dev_set_drvdata(dev, indio_dev);
+
+	return iio_device_register(indio_dev);
+}
+EXPORT_SYMBOL(bma400_probe);
+
+int bma400_remove(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct bma400_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = bma400_set_power_mode(data, POWER_MODE_SLEEP);
+	mutex_unlock(&data->mutex);
+
+	regulator_bulk_disable(ARRAY_SIZE(data->regulators),
+			       data->regulators);
+
+	iio_device_unregister(indio_dev);
+
+	return ret;
+}
+EXPORT_SYMBOL(bma400_remove);
+
+MODULE_AUTHOR("Dan Robertson <dan@dlrobertson.com>");
+MODULE_DESCRIPTION("Bosch BMA400 triaxial acceleration sensor core");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/bma400_i2c.c b/drivers/iio/accel/bma400_i2c.c
new file mode 100644
index 000000000..9dcb7cc99
--- /dev/null
+++ b/drivers/iio/accel/bma400_i2c.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * I2C IIO driver for Bosch BMA400 triaxial acceleration sensor.
+ *
+ * Copyright 2019 Dan Robertson <dan@dlrobertson.com>
+ *
+ * I2C address is either 0x14 or 0x15 depending on SDO
+ */
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "bma400.h"
+
+static int bma400_i2c_probe(struct i2c_client *client,
+			    const struct i2c_device_id *id)
+{
+	struct regmap *regmap;
+
+	regmap = devm_regmap_init_i2c(client, &bma400_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(&client->dev, "failed to create regmap\n");
+		return PTR_ERR(regmap);
+	}
+
+	return bma400_probe(&client->dev, regmap, id->name);
+}
+
+static int bma400_i2c_remove(struct i2c_client *client)
+{
+	return bma400_remove(&client->dev);
+}
+
+static const struct i2c_device_id bma400_i2c_ids[] = {
+	{ "bma400", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, bma400_i2c_ids);
+
+static const struct of_device_id bma400_of_i2c_match[] = {
+	{ .compatible = "bosch,bma400" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, bma400_of_i2c_match);
+
+static struct i2c_driver bma400_i2c_driver = {
+	.driver = {
+		.name = "bma400",
+		.of_match_table = bma400_of_i2c_match,
+	},
+	.probe    = bma400_i2c_probe,
+	.remove   = bma400_i2c_remove,
+	.id_table = bma400_i2c_ids,
+};
+
+module_i2c_driver(bma400_i2c_driver);
+
+MODULE_AUTHOR("Dan Robertson <dan@dlrobertson.com>");
+MODULE_DESCRIPTION("Bosch BMA400 triaxial acceleration sensor (I2C)");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/bma400_spi.c b/drivers/iio/accel/bma400_spi.c
new file mode 100644
index 000000000..7c2825904
--- /dev/null
+++ b/drivers/iio/accel/bma400_spi.c
@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * SPI IIO driver for Bosch BMA400 triaxial acceleration sensor.
+ *
+ * Copyright 2020 Dan Robertson <dan@dlrobertson.com>
+ *
+ */
+#include <linux/bits.h>
+#include <linux/init.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include "bma400.h"
+
+#define BMA400_MAX_SPI_READ 2
+#define BMA400_SPI_READ_BUFFER_SIZE (BMA400_MAX_SPI_READ + 1)
+
+static int bma400_regmap_spi_read(void *context,
+				  const void *reg, size_t reg_size,
+				  void *val, size_t val_size)
+{
+	struct device *dev = context;
+	struct spi_device *spi = to_spi_device(dev);
+	u8 result[BMA400_SPI_READ_BUFFER_SIZE];
+	ssize_t status;
+
+	if (val_size > BMA400_MAX_SPI_READ)
+		return -EINVAL;
+
+	status = spi_write_then_read(spi, reg, 1, result, val_size + 1);
+	if (status)
+		return status;
+
+	/*
+	 * From the BMA400 datasheet:
+	 *
+	 * > For a basic read operation two bytes have to be read and the first
+	 * > has to be dropped and the second byte must be interpreted.
+	 */
+	memcpy(val, result + 1, val_size);
+
+	return 0;
+}
+
+static int bma400_regmap_spi_write(void *context, const void *data,
+				   size_t count)
+{
+	struct device *dev = context;
+	struct spi_device *spi = to_spi_device(dev);
+
+	return spi_write(spi, data, count);
+}
+
+static struct regmap_bus bma400_regmap_bus = {
+	.read = bma400_regmap_spi_read,
+	.write = bma400_regmap_spi_write,
+	.read_flag_mask = BIT(7),
+	.max_raw_read = BMA400_MAX_SPI_READ,
+};
+
+static int bma400_spi_probe(struct spi_device *spi)
+{
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	struct regmap *regmap;
+	unsigned int val;
+	int ret;
+
+	regmap = devm_regmap_init(&spi->dev, &bma400_regmap_bus,
+				  &spi->dev, &bma400_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(&spi->dev, "failed to create regmap\n");
+		return PTR_ERR(regmap);
+	}
+
+	/*
+	 * Per the bma400 datasheet, the first SPI read may
+	 * return garbage. As the datasheet recommends, the
+	 * chip ID register will be read here and checked
+	 * again in the following probe.
+	 */
+	ret = regmap_read(regmap, BMA400_CHIP_ID_REG, &val);
+	if (ret)
+		dev_err(&spi->dev, "Failed to read chip id register\n");
+
+	return bma400_probe(&spi->dev, regmap, id->name);
+}
+
+static int bma400_spi_remove(struct spi_device *spi)
+{
+	return bma400_remove(&spi->dev);
+}
+
+static const struct spi_device_id bma400_spi_ids[] = {
+	{ "bma400", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, bma400_spi_ids);
+
+static const struct of_device_id bma400_of_spi_match[] = {
+	{ .compatible = "bosch,bma400" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, bma400_of_spi_match);
+
+static struct spi_driver bma400_spi_driver = {
+	.driver = {
+		.name = "bma400",
+		.of_match_table = bma400_of_spi_match,
+	},
+	.probe    = bma400_spi_probe,
+	.remove   = bma400_spi_remove,
+	.id_table = bma400_spi_ids,
+};
+
+module_spi_driver(bma400_spi_driver);
+MODULE_AUTHOR("Dan Robertson <dan@dlrobertson.com>");
+MODULE_DESCRIPTION("Bosch BMA400 triaxial acceleration sensor (SPI)");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/bmc150-accel-core.c b/drivers/iio/accel/bmc150-accel-core.c
new file mode 100644
index 000000000..792526462
--- /dev/null
+++ b/drivers/iio/accel/bmc150-accel-core.c
@@ -0,0 +1,1765 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
+ *  - BMC150
+ *  - BMI055
+ *  - BMA255
+ *  - BMA250E
+ *  - BMA222E
+ *  - BMA280
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/events.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/regmap.h>
+
+#include "bmc150-accel.h"
+
+#define BMC150_ACCEL_DRV_NAME			"bmc150_accel"
+#define BMC150_ACCEL_IRQ_NAME			"bmc150_accel_event"
+
+#define BMC150_ACCEL_REG_CHIP_ID		0x00
+
+#define BMC150_ACCEL_REG_INT_STATUS_2		0x0B
+#define BMC150_ACCEL_ANY_MOTION_MASK		0x07
+#define BMC150_ACCEL_ANY_MOTION_BIT_X		BIT(0)
+#define BMC150_ACCEL_ANY_MOTION_BIT_Y		BIT(1)
+#define BMC150_ACCEL_ANY_MOTION_BIT_Z		BIT(2)
+#define BMC150_ACCEL_ANY_MOTION_BIT_SIGN	BIT(3)
+
+#define BMC150_ACCEL_REG_PMU_LPW		0x11
+#define BMC150_ACCEL_PMU_MODE_MASK		0xE0
+#define BMC150_ACCEL_PMU_MODE_SHIFT		5
+#define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_MASK	0x17
+#define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT	1
+
+#define BMC150_ACCEL_REG_PMU_RANGE		0x0F
+
+#define BMC150_ACCEL_DEF_RANGE_2G		0x03
+#define BMC150_ACCEL_DEF_RANGE_4G		0x05
+#define BMC150_ACCEL_DEF_RANGE_8G		0x08
+#define BMC150_ACCEL_DEF_RANGE_16G		0x0C
+
+/* Default BW: 125Hz */
+#define BMC150_ACCEL_REG_PMU_BW		0x10
+#define BMC150_ACCEL_DEF_BW			125
+
+#define BMC150_ACCEL_REG_RESET			0x14
+#define BMC150_ACCEL_RESET_VAL			0xB6
+
+#define BMC150_ACCEL_REG_INT_MAP_0		0x19
+#define BMC150_ACCEL_INT_MAP_0_BIT_SLOPE	BIT(2)
+
+#define BMC150_ACCEL_REG_INT_MAP_1		0x1A
+#define BMC150_ACCEL_INT_MAP_1_BIT_DATA		BIT(0)
+#define BMC150_ACCEL_INT_MAP_1_BIT_FWM		BIT(1)
+#define BMC150_ACCEL_INT_MAP_1_BIT_FFULL	BIT(2)
+
+#define BMC150_ACCEL_REG_INT_RST_LATCH		0x21
+#define BMC150_ACCEL_INT_MODE_LATCH_RESET	0x80
+#define BMC150_ACCEL_INT_MODE_LATCH_INT	0x0F
+#define BMC150_ACCEL_INT_MODE_NON_LATCH_INT	0x00
+
+#define BMC150_ACCEL_REG_INT_EN_0		0x16
+#define BMC150_ACCEL_INT_EN_BIT_SLP_X		BIT(0)
+#define BMC150_ACCEL_INT_EN_BIT_SLP_Y		BIT(1)
+#define BMC150_ACCEL_INT_EN_BIT_SLP_Z		BIT(2)
+
+#define BMC150_ACCEL_REG_INT_EN_1		0x17
+#define BMC150_ACCEL_INT_EN_BIT_DATA_EN		BIT(4)
+#define BMC150_ACCEL_INT_EN_BIT_FFULL_EN	BIT(5)
+#define BMC150_ACCEL_INT_EN_BIT_FWM_EN		BIT(6)
+
+#define BMC150_ACCEL_REG_INT_OUT_CTRL		0x20
+#define BMC150_ACCEL_INT_OUT_CTRL_INT1_LVL	BIT(0)
+
+#define BMC150_ACCEL_REG_INT_5			0x27
+#define BMC150_ACCEL_SLOPE_DUR_MASK		0x03
+
+#define BMC150_ACCEL_REG_INT_6			0x28
+#define BMC150_ACCEL_SLOPE_THRES_MASK		0xFF
+
+/* Slope duration in terms of number of samples */
+#define BMC150_ACCEL_DEF_SLOPE_DURATION		1
+/* in terms of multiples of g's/LSB, based on range */
+#define BMC150_ACCEL_DEF_SLOPE_THRESHOLD	1
+
+#define BMC150_ACCEL_REG_XOUT_L		0x02
+
+#define BMC150_ACCEL_MAX_STARTUP_TIME_MS	100
+
+/* Sleep Duration values */
+#define BMC150_ACCEL_SLEEP_500_MICRO		0x05
+#define BMC150_ACCEL_SLEEP_1_MS		0x06
+#define BMC150_ACCEL_SLEEP_2_MS		0x07
+#define BMC150_ACCEL_SLEEP_4_MS		0x08
+#define BMC150_ACCEL_SLEEP_6_MS		0x09
+#define BMC150_ACCEL_SLEEP_10_MS		0x0A
+#define BMC150_ACCEL_SLEEP_25_MS		0x0B
+#define BMC150_ACCEL_SLEEP_50_MS		0x0C
+#define BMC150_ACCEL_SLEEP_100_MS		0x0D
+#define BMC150_ACCEL_SLEEP_500_MS		0x0E
+#define BMC150_ACCEL_SLEEP_1_SEC		0x0F
+
+#define BMC150_ACCEL_REG_TEMP			0x08
+#define BMC150_ACCEL_TEMP_CENTER_VAL		23
+
+#define BMC150_ACCEL_AXIS_TO_REG(axis)	(BMC150_ACCEL_REG_XOUT_L + (axis * 2))
+#define BMC150_AUTO_SUSPEND_DELAY_MS		2000
+
+#define BMC150_ACCEL_REG_FIFO_STATUS		0x0E
+#define BMC150_ACCEL_REG_FIFO_CONFIG0		0x30
+#define BMC150_ACCEL_REG_FIFO_CONFIG1		0x3E
+#define BMC150_ACCEL_REG_FIFO_DATA		0x3F
+#define BMC150_ACCEL_FIFO_LENGTH		32
+
+enum bmc150_accel_axis {
+	AXIS_X,
+	AXIS_Y,
+	AXIS_Z,
+	AXIS_MAX,
+};
+
+enum bmc150_power_modes {
+	BMC150_ACCEL_SLEEP_MODE_NORMAL,
+	BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND,
+	BMC150_ACCEL_SLEEP_MODE_LPM,
+	BMC150_ACCEL_SLEEP_MODE_SUSPEND = 0x04,
+};
+
+struct bmc150_scale_info {
+	int scale;
+	u8 reg_range;
+};
+
+struct bmc150_accel_chip_info {
+	const char *name;
+	u8 chip_id;
+	const struct iio_chan_spec *channels;
+	int num_channels;
+	const struct bmc150_scale_info scale_table[4];
+};
+
+struct bmc150_accel_interrupt {
+	const struct bmc150_accel_interrupt_info *info;
+	atomic_t users;
+};
+
+struct bmc150_accel_trigger {
+	struct bmc150_accel_data *data;
+	struct iio_trigger *indio_trig;
+	int (*setup)(struct bmc150_accel_trigger *t, bool state);
+	int intr;
+	bool enabled;
+};
+
+enum bmc150_accel_interrupt_id {
+	BMC150_ACCEL_INT_DATA_READY,
+	BMC150_ACCEL_INT_ANY_MOTION,
+	BMC150_ACCEL_INT_WATERMARK,
+	BMC150_ACCEL_INTERRUPTS,
+};
+
+enum bmc150_accel_trigger_id {
+	BMC150_ACCEL_TRIGGER_DATA_READY,
+	BMC150_ACCEL_TRIGGER_ANY_MOTION,
+	BMC150_ACCEL_TRIGGERS,
+};
+
+struct bmc150_accel_data {
+	struct regmap *regmap;
+	int irq;
+	struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS];
+	struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS];
+	struct mutex mutex;
+	u8 fifo_mode, watermark;
+	s16 buffer[8];
+	/*
+	 * Ensure there is sufficient space and correct alignment for
+	 * the timestamp if enabled
+	 */
+	struct {
+		__le16 channels[3];
+		s64 ts __aligned(8);
+	} scan;
+	u8 bw_bits;
+	u32 slope_dur;
+	u32 slope_thres;
+	u32 range;
+	int ev_enable_state;
+	int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */
+	const struct bmc150_accel_chip_info *chip_info;
+	struct iio_mount_matrix orientation;
+};
+
+static const struct {
+	int val;
+	int val2;
+	u8 bw_bits;
+} bmc150_accel_samp_freq_table[] = { {15, 620000, 0x08},
+				     {31, 260000, 0x09},
+				     {62, 500000, 0x0A},
+				     {125, 0, 0x0B},
+				     {250, 0, 0x0C},
+				     {500, 0, 0x0D},
+				     {1000, 0, 0x0E},
+				     {2000, 0, 0x0F} };
+
+static const struct {
+	int bw_bits;
+	int msec;
+} bmc150_accel_sample_upd_time[] = { {0x08, 64},
+				     {0x09, 32},
+				     {0x0A, 16},
+				     {0x0B, 8},
+				     {0x0C, 4},
+				     {0x0D, 2},
+				     {0x0E, 1},
+				     {0x0F, 1} };
+
+static const struct {
+	int sleep_dur;
+	u8 reg_value;
+} bmc150_accel_sleep_value_table[] = { {0, 0},
+				       {500, BMC150_ACCEL_SLEEP_500_MICRO},
+				       {1000, BMC150_ACCEL_SLEEP_1_MS},
+				       {2000, BMC150_ACCEL_SLEEP_2_MS},
+				       {4000, BMC150_ACCEL_SLEEP_4_MS},
+				       {6000, BMC150_ACCEL_SLEEP_6_MS},
+				       {10000, BMC150_ACCEL_SLEEP_10_MS},
+				       {25000, BMC150_ACCEL_SLEEP_25_MS},
+				       {50000, BMC150_ACCEL_SLEEP_50_MS},
+				       {100000, BMC150_ACCEL_SLEEP_100_MS},
+				       {500000, BMC150_ACCEL_SLEEP_500_MS},
+				       {1000000, BMC150_ACCEL_SLEEP_1_SEC} };
+
+const struct regmap_config bmc150_regmap_conf = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0x3f,
+};
+EXPORT_SYMBOL_GPL(bmc150_regmap_conf);
+
+static int bmc150_accel_set_mode(struct bmc150_accel_data *data,
+				 enum bmc150_power_modes mode,
+				 int dur_us)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	int i;
+	int ret;
+	u8 lpw_bits;
+	int dur_val = -1;
+
+	if (dur_us > 0) {
+		for (i = 0; i < ARRAY_SIZE(bmc150_accel_sleep_value_table);
+									 ++i) {
+			if (bmc150_accel_sleep_value_table[i].sleep_dur ==
+									dur_us)
+				dur_val =
+				bmc150_accel_sleep_value_table[i].reg_value;
+		}
+	} else {
+		dur_val = 0;
+	}
+
+	if (dur_val < 0)
+		return -EINVAL;
+
+	lpw_bits = mode << BMC150_ACCEL_PMU_MODE_SHIFT;
+	lpw_bits |= (dur_val << BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT);
+
+	dev_dbg(dev, "Set Mode bits %x\n", lpw_bits);
+
+	ret = regmap_write(data->regmap, BMC150_ACCEL_REG_PMU_LPW, lpw_bits);
+	if (ret < 0) {
+		dev_err(dev, "Error writing reg_pmu_lpw\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val,
+			       int val2)
+{
+	int i;
+	int ret;
+
+	for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) {
+		if (bmc150_accel_samp_freq_table[i].val == val &&
+		    bmc150_accel_samp_freq_table[i].val2 == val2) {
+			ret = regmap_write(data->regmap,
+				BMC150_ACCEL_REG_PMU_BW,
+				bmc150_accel_samp_freq_table[i].bw_bits);
+			if (ret < 0)
+				return ret;
+
+			data->bw_bits =
+				bmc150_accel_samp_freq_table[i].bw_bits;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int bmc150_accel_update_slope(struct bmc150_accel_data *data)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret;
+
+	ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_6,
+					data->slope_thres);
+	if (ret < 0) {
+		dev_err(dev, "Error writing reg_int_6\n");
+		return ret;
+	}
+
+	ret = regmap_update_bits(data->regmap, BMC150_ACCEL_REG_INT_5,
+				 BMC150_ACCEL_SLOPE_DUR_MASK, data->slope_dur);
+	if (ret < 0) {
+		dev_err(dev, "Error updating reg_int_5\n");
+		return ret;
+	}
+
+	dev_dbg(dev, "%x %x\n", data->slope_thres, data->slope_dur);
+
+	return ret;
+}
+
+static int bmc150_accel_any_motion_setup(struct bmc150_accel_trigger *t,
+					 bool state)
+{
+	if (state)
+		return bmc150_accel_update_slope(t->data);
+
+	return 0;
+}
+
+static int bmc150_accel_get_bw(struct bmc150_accel_data *data, int *val,
+			       int *val2)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) {
+		if (bmc150_accel_samp_freq_table[i].bw_bits == data->bw_bits) {
+			*val = bmc150_accel_samp_freq_table[i].val;
+			*val2 = bmc150_accel_samp_freq_table[i].val2;
+			return IIO_VAL_INT_PLUS_MICRO;
+		}
+	}
+
+	return -EINVAL;
+}
+
+#ifdef CONFIG_PM
+static int bmc150_accel_get_startup_times(struct bmc150_accel_data *data)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(bmc150_accel_sample_upd_time); ++i) {
+		if (bmc150_accel_sample_upd_time[i].bw_bits == data->bw_bits)
+			return bmc150_accel_sample_upd_time[i].msec;
+	}
+
+	return BMC150_ACCEL_MAX_STARTUP_TIME_MS;
+}
+
+static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret;
+
+	if (on) {
+		ret = pm_runtime_get_sync(dev);
+	} else {
+		pm_runtime_mark_last_busy(dev);
+		ret = pm_runtime_put_autosuspend(dev);
+	}
+
+	if (ret < 0) {
+		dev_err(dev,
+			"Failed: %s for %d\n", __func__, on);
+		if (on)
+			pm_runtime_put_noidle(dev);
+
+		return ret;
+	}
+
+	return 0;
+}
+#else
+static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on)
+{
+	return 0;
+}
+#endif
+
+static const struct bmc150_accel_interrupt_info {
+	u8 map_reg;
+	u8 map_bitmask;
+	u8 en_reg;
+	u8 en_bitmask;
+} bmc150_accel_interrupts[BMC150_ACCEL_INTERRUPTS] = {
+	{ /* data ready interrupt */
+		.map_reg = BMC150_ACCEL_REG_INT_MAP_1,
+		.map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_DATA,
+		.en_reg = BMC150_ACCEL_REG_INT_EN_1,
+		.en_bitmask = BMC150_ACCEL_INT_EN_BIT_DATA_EN,
+	},
+	{  /* motion interrupt */
+		.map_reg = BMC150_ACCEL_REG_INT_MAP_0,
+		.map_bitmask = BMC150_ACCEL_INT_MAP_0_BIT_SLOPE,
+		.en_reg = BMC150_ACCEL_REG_INT_EN_0,
+		.en_bitmask =  BMC150_ACCEL_INT_EN_BIT_SLP_X |
+			BMC150_ACCEL_INT_EN_BIT_SLP_Y |
+			BMC150_ACCEL_INT_EN_BIT_SLP_Z
+	},
+	{ /* fifo watermark interrupt */
+		.map_reg = BMC150_ACCEL_REG_INT_MAP_1,
+		.map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_FWM,
+		.en_reg = BMC150_ACCEL_REG_INT_EN_1,
+		.en_bitmask = BMC150_ACCEL_INT_EN_BIT_FWM_EN,
+	},
+};
+
+static void bmc150_accel_interrupts_setup(struct iio_dev *indio_dev,
+					  struct bmc150_accel_data *data)
+{
+	int i;
+
+	for (i = 0; i < BMC150_ACCEL_INTERRUPTS; i++)
+		data->interrupts[i].info = &bmc150_accel_interrupts[i];
+}
+
+static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, int i,
+				      bool state)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	struct bmc150_accel_interrupt *intr = &data->interrupts[i];
+	const struct bmc150_accel_interrupt_info *info = intr->info;
+	int ret;
+
+	if (state) {
+		if (atomic_inc_return(&intr->users) > 1)
+			return 0;
+	} else {
+		if (atomic_dec_return(&intr->users) > 0)
+			return 0;
+	}
+
+	/*
+	 * We will expect the enable and disable to do operation in reverse
+	 * order. This will happen here anyway, as our resume operation uses
+	 * sync mode runtime pm calls. The suspend operation will be delayed
+	 * by autosuspend delay.
+	 * So the disable operation will still happen in reverse order of
+	 * enable operation. When runtime pm is disabled the mode is always on,
+	 * so sequence doesn't matter.
+	 */
+	ret = bmc150_accel_set_power_state(data, state);
+	if (ret < 0)
+		return ret;
+
+	/* map the interrupt to the appropriate pins */
+	ret = regmap_update_bits(data->regmap, info->map_reg, info->map_bitmask,
+				 (state ? info->map_bitmask : 0));
+	if (ret < 0) {
+		dev_err(dev, "Error updating reg_int_map\n");
+		goto out_fix_power_state;
+	}
+
+	/* enable/disable the interrupt */
+	ret = regmap_update_bits(data->regmap, info->en_reg, info->en_bitmask,
+				 (state ? info->en_bitmask : 0));
+	if (ret < 0) {
+		dev_err(dev, "Error updating reg_int_en\n");
+		goto out_fix_power_state;
+	}
+
+	return 0;
+
+out_fix_power_state:
+	bmc150_accel_set_power_state(data, false);
+	return ret;
+}
+
+static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret, i;
+
+	for (i = 0; i < ARRAY_SIZE(data->chip_info->scale_table); ++i) {
+		if (data->chip_info->scale_table[i].scale == val) {
+			ret = regmap_write(data->regmap,
+				     BMC150_ACCEL_REG_PMU_RANGE,
+				     data->chip_info->scale_table[i].reg_range);
+			if (ret < 0) {
+				dev_err(dev, "Error writing pmu_range\n");
+				return ret;
+			}
+
+			data->range = data->chip_info->scale_table[i].reg_range;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int bmc150_accel_get_temp(struct bmc150_accel_data *data, int *val)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret;
+	unsigned int value;
+
+	mutex_lock(&data->mutex);
+
+	ret = regmap_read(data->regmap, BMC150_ACCEL_REG_TEMP, &value);
+	if (ret < 0) {
+		dev_err(dev, "Error reading reg_temp\n");
+		mutex_unlock(&data->mutex);
+		return ret;
+	}
+	*val = sign_extend32(value, 7);
+
+	mutex_unlock(&data->mutex);
+
+	return IIO_VAL_INT;
+}
+
+static int bmc150_accel_get_axis(struct bmc150_accel_data *data,
+				 struct iio_chan_spec const *chan,
+				 int *val)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret;
+	int axis = chan->scan_index;
+	__le16 raw_val;
+
+	mutex_lock(&data->mutex);
+	ret = bmc150_accel_set_power_state(data, true);
+	if (ret < 0) {
+		mutex_unlock(&data->mutex);
+		return ret;
+	}
+
+	ret = regmap_bulk_read(data->regmap, BMC150_ACCEL_AXIS_TO_REG(axis),
+			       &raw_val, sizeof(raw_val));
+	if (ret < 0) {
+		dev_err(dev, "Error reading axis %d\n", axis);
+		bmc150_accel_set_power_state(data, false);
+		mutex_unlock(&data->mutex);
+		return ret;
+	}
+	*val = sign_extend32(le16_to_cpu(raw_val) >> chan->scan_type.shift,
+			     chan->scan_type.realbits - 1);
+	ret = bmc150_accel_set_power_state(data, false);
+	mutex_unlock(&data->mutex);
+	if (ret < 0)
+		return ret;
+
+	return IIO_VAL_INT;
+}
+
+static int bmc150_accel_read_raw(struct iio_dev *indio_dev,
+				 struct iio_chan_spec const *chan,
+				 int *val, int *val2, long mask)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		switch (chan->type) {
+		case IIO_TEMP:
+			return bmc150_accel_get_temp(data, val);
+		case IIO_ACCEL:
+			if (iio_buffer_enabled(indio_dev))
+				return -EBUSY;
+			else
+				return bmc150_accel_get_axis(data, chan, val);
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_OFFSET:
+		if (chan->type == IIO_TEMP) {
+			*val = BMC150_ACCEL_TEMP_CENTER_VAL;
+			return IIO_VAL_INT;
+		} else {
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		switch (chan->type) {
+		case IIO_TEMP:
+			*val2 = 500000;
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_ACCEL:
+		{
+			int i;
+			const struct bmc150_scale_info *si;
+			int st_size = ARRAY_SIZE(data->chip_info->scale_table);
+
+			for (i = 0; i < st_size; ++i) {
+				si = &data->chip_info->scale_table[i];
+				if (si->reg_range == data->range) {
+					*val2 = si->scale;
+					return IIO_VAL_INT_PLUS_MICRO;
+				}
+			}
+			return -EINVAL;
+		}
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		mutex_lock(&data->mutex);
+		ret = bmc150_accel_get_bw(data, val, val2);
+		mutex_unlock(&data->mutex);
+		return ret;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int bmc150_accel_write_raw(struct iio_dev *indio_dev,
+				  struct iio_chan_spec const *chan,
+				  int val, int val2, long mask)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		mutex_lock(&data->mutex);
+		ret = bmc150_accel_set_bw(data, val, val2);
+		mutex_unlock(&data->mutex);
+		break;
+	case IIO_CHAN_INFO_SCALE:
+		if (val)
+			return -EINVAL;
+
+		mutex_lock(&data->mutex);
+		ret = bmc150_accel_set_scale(data, val2);
+		mutex_unlock(&data->mutex);
+		return ret;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int bmc150_accel_read_event(struct iio_dev *indio_dev,
+				   const struct iio_chan_spec *chan,
+				   enum iio_event_type type,
+				   enum iio_event_direction dir,
+				   enum iio_event_info info,
+				   int *val, int *val2)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	*val2 = 0;
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		*val = data->slope_thres;
+		break;
+	case IIO_EV_INFO_PERIOD:
+		*val = data->slope_dur;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return IIO_VAL_INT;
+}
+
+static int bmc150_accel_write_event(struct iio_dev *indio_dev,
+				    const struct iio_chan_spec *chan,
+				    enum iio_event_type type,
+				    enum iio_event_direction dir,
+				    enum iio_event_info info,
+				    int val, int val2)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	if (data->ev_enable_state)
+		return -EBUSY;
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		data->slope_thres = val & BMC150_ACCEL_SLOPE_THRES_MASK;
+		break;
+	case IIO_EV_INFO_PERIOD:
+		data->slope_dur = val & BMC150_ACCEL_SLOPE_DUR_MASK;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int bmc150_accel_read_event_config(struct iio_dev *indio_dev,
+					  const struct iio_chan_spec *chan,
+					  enum iio_event_type type,
+					  enum iio_event_direction dir)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	return data->ev_enable_state;
+}
+
+static int bmc150_accel_write_event_config(struct iio_dev *indio_dev,
+					   const struct iio_chan_spec *chan,
+					   enum iio_event_type type,
+					   enum iio_event_direction dir,
+					   int state)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int ret;
+
+	if (state == data->ev_enable_state)
+		return 0;
+
+	mutex_lock(&data->mutex);
+
+	ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_ANY_MOTION,
+					 state);
+	if (ret < 0) {
+		mutex_unlock(&data->mutex);
+		return ret;
+	}
+
+	data->ev_enable_state = state;
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+static int bmc150_accel_validate_trigger(struct iio_dev *indio_dev,
+					 struct iio_trigger *trig)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int i;
+
+	for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
+		if (data->triggers[i].indio_trig == trig)
+			return 0;
+	}
+
+	return -EINVAL;
+}
+
+static ssize_t bmc150_accel_get_fifo_watermark(struct device *dev,
+					       struct device_attribute *attr,
+					       char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int wm;
+
+	mutex_lock(&data->mutex);
+	wm = data->watermark;
+	mutex_unlock(&data->mutex);
+
+	return sprintf(buf, "%d\n", wm);
+}
+
+static ssize_t bmc150_accel_get_fifo_state(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	bool state;
+
+	mutex_lock(&data->mutex);
+	state = data->fifo_mode;
+	mutex_unlock(&data->mutex);
+
+	return sprintf(buf, "%d\n", state);
+}
+
+static const struct iio_mount_matrix *
+bmc150_accel_get_mount_matrix(const struct iio_dev *indio_dev,
+				const struct iio_chan_spec *chan)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	return &data->orientation;
+}
+
+static const struct iio_chan_spec_ext_info bmc150_accel_ext_info[] = {
+	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bmc150_accel_get_mount_matrix),
+	{ }
+};
+
+static IIO_CONST_ATTR(hwfifo_watermark_min, "1");
+static IIO_CONST_ATTR(hwfifo_watermark_max,
+		      __stringify(BMC150_ACCEL_FIFO_LENGTH));
+static IIO_DEVICE_ATTR(hwfifo_enabled, S_IRUGO,
+		       bmc150_accel_get_fifo_state, NULL, 0);
+static IIO_DEVICE_ATTR(hwfifo_watermark, S_IRUGO,
+		       bmc150_accel_get_fifo_watermark, NULL, 0);
+
+static const struct attribute *bmc150_accel_fifo_attributes[] = {
+	&iio_const_attr_hwfifo_watermark_min.dev_attr.attr,
+	&iio_const_attr_hwfifo_watermark_max.dev_attr.attr,
+	&iio_dev_attr_hwfifo_watermark.dev_attr.attr,
+	&iio_dev_attr_hwfifo_enabled.dev_attr.attr,
+	NULL,
+};
+
+static int bmc150_accel_set_watermark(struct iio_dev *indio_dev, unsigned val)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	if (val > BMC150_ACCEL_FIFO_LENGTH)
+		val = BMC150_ACCEL_FIFO_LENGTH;
+
+	mutex_lock(&data->mutex);
+	data->watermark = val;
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+/*
+ * We must read at least one full frame in one burst, otherwise the rest of the
+ * frame data is discarded.
+ */
+static int bmc150_accel_fifo_transfer(struct bmc150_accel_data *data,
+				      char *buffer, int samples)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	int sample_length = 3 * 2;
+	int ret;
+	int total_length = samples * sample_length;
+
+	ret = regmap_raw_read(data->regmap, BMC150_ACCEL_REG_FIFO_DATA,
+			      buffer, total_length);
+	if (ret)
+		dev_err(dev,
+			"Error transferring data from fifo: %d\n", ret);
+
+	return ret;
+}
+
+static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev,
+				     unsigned samples, bool irq)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret, i;
+	u8 count;
+	u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3];
+	int64_t tstamp;
+	uint64_t sample_period;
+	unsigned int val;
+
+	ret = regmap_read(data->regmap, BMC150_ACCEL_REG_FIFO_STATUS, &val);
+	if (ret < 0) {
+		dev_err(dev, "Error reading reg_fifo_status\n");
+		return ret;
+	}
+
+	count = val & 0x7F;
+
+	if (!count)
+		return 0;
+
+	/*
+	 * If we getting called from IRQ handler we know the stored timestamp is
+	 * fairly accurate for the last stored sample. Otherwise, if we are
+	 * called as a result of a read operation from userspace and hence
+	 * before the watermark interrupt was triggered, take a timestamp
+	 * now. We can fall anywhere in between two samples so the error in this
+	 * case is at most one sample period.
+	 */
+	if (!irq) {
+		data->old_timestamp = data->timestamp;
+		data->timestamp = iio_get_time_ns(indio_dev);
+	}
+
+	/*
+	 * Approximate timestamps for each of the sample based on the sampling
+	 * frequency, timestamp for last sample and number of samples.
+	 *
+	 * Note that we can't use the current bandwidth settings to compute the
+	 * sample period because the sample rate varies with the device
+	 * (e.g. between 31.70ms to 32.20ms for a bandwidth of 15.63HZ). That
+	 * small variation adds when we store a large number of samples and
+	 * creates significant jitter between the last and first samples in
+	 * different batches (e.g. 32ms vs 21ms).
+	 *
+	 * To avoid this issue we compute the actual sample period ourselves
+	 * based on the timestamp delta between the last two flush operations.
+	 */
+	sample_period = (data->timestamp - data->old_timestamp);
+	do_div(sample_period, count);
+	tstamp = data->timestamp - (count - 1) * sample_period;
+
+	if (samples && count > samples)
+		count = samples;
+
+	ret = bmc150_accel_fifo_transfer(data, (u8 *)buffer, count);
+	if (ret)
+		return ret;
+
+	/*
+	 * Ideally we want the IIO core to handle the demux when running in fifo
+	 * mode but not when running in triggered buffer mode. Unfortunately
+	 * this does not seem to be possible, so stick with driver demux for
+	 * now.
+	 */
+	for (i = 0; i < count; i++) {
+		int j, bit;
+
+		j = 0;
+		for_each_set_bit(bit, indio_dev->active_scan_mask,
+				 indio_dev->masklength)
+			memcpy(&data->scan.channels[j++], &buffer[i * 3 + bit],
+			       sizeof(data->scan.channels[0]));
+
+		iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+						   tstamp);
+
+		tstamp += sample_period;
+	}
+
+	return count;
+}
+
+static int bmc150_accel_fifo_flush(struct iio_dev *indio_dev, unsigned samples)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = __bmc150_accel_fifo_flush(indio_dev, samples, false);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
+		"15.620000 31.260000 62.50000 125 250 500 1000 2000");
+
+static struct attribute *bmc150_accel_attributes[] = {
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group bmc150_accel_attrs_group = {
+	.attrs = bmc150_accel_attributes,
+};
+
+static const struct iio_event_spec bmc150_accel_event = {
+		.type = IIO_EV_TYPE_ROC,
+		.dir = IIO_EV_DIR_EITHER,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
+				 BIT(IIO_EV_INFO_ENABLE) |
+				 BIT(IIO_EV_INFO_PERIOD)
+};
+
+#define BMC150_ACCEL_CHANNEL(_axis, bits) {				\
+	.type = IIO_ACCEL,						\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##_axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
+				BIT(IIO_CHAN_INFO_SAMP_FREQ),		\
+	.scan_index = AXIS_##_axis,					\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = (bits),					\
+		.storagebits = 16,					\
+		.shift = 16 - (bits),					\
+		.endianness = IIO_LE,					\
+	},								\
+	.ext_info = bmc150_accel_ext_info,				\
+	.event_spec = &bmc150_accel_event,				\
+	.num_event_specs = 1						\
+}
+
+#define BMC150_ACCEL_CHANNELS(bits) {					\
+	{								\
+		.type = IIO_TEMP,					\
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |		\
+				      BIT(IIO_CHAN_INFO_SCALE) |	\
+				      BIT(IIO_CHAN_INFO_OFFSET),	\
+		.scan_index = -1,					\
+	},								\
+	BMC150_ACCEL_CHANNEL(X, bits),					\
+	BMC150_ACCEL_CHANNEL(Y, bits),					\
+	BMC150_ACCEL_CHANNEL(Z, bits),					\
+	IIO_CHAN_SOFT_TIMESTAMP(3),					\
+}
+
+static const struct iio_chan_spec bma222e_accel_channels[] =
+	BMC150_ACCEL_CHANNELS(8);
+static const struct iio_chan_spec bma250e_accel_channels[] =
+	BMC150_ACCEL_CHANNELS(10);
+static const struct iio_chan_spec bmc150_accel_channels[] =
+	BMC150_ACCEL_CHANNELS(12);
+static const struct iio_chan_spec bma280_accel_channels[] =
+	BMC150_ACCEL_CHANNELS(14);
+
+static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = {
+	[bmc150] = {
+		.name = "BMC150A",
+		.chip_id = 0xFA,
+		.channels = bmc150_accel_channels,
+		.num_channels = ARRAY_SIZE(bmc150_accel_channels),
+		.scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G},
+				 {19122, BMC150_ACCEL_DEF_RANGE_4G},
+				 {38344, BMC150_ACCEL_DEF_RANGE_8G},
+				 {76590, BMC150_ACCEL_DEF_RANGE_16G} },
+	},
+	[bmi055] = {
+		.name = "BMI055A",
+		.chip_id = 0xFA,
+		.channels = bmc150_accel_channels,
+		.num_channels = ARRAY_SIZE(bmc150_accel_channels),
+		.scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G},
+				 {19122, BMC150_ACCEL_DEF_RANGE_4G},
+				 {38344, BMC150_ACCEL_DEF_RANGE_8G},
+				 {76590, BMC150_ACCEL_DEF_RANGE_16G} },
+	},
+	[bma255] = {
+		.name = "BMA0255",
+		.chip_id = 0xFA,
+		.channels = bmc150_accel_channels,
+		.num_channels = ARRAY_SIZE(bmc150_accel_channels),
+		.scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G},
+				 {19122, BMC150_ACCEL_DEF_RANGE_4G},
+				 {38344, BMC150_ACCEL_DEF_RANGE_8G},
+				 {76590, BMC150_ACCEL_DEF_RANGE_16G} },
+	},
+	[bma250e] = {
+		.name = "BMA250E",
+		.chip_id = 0xF9,
+		.channels = bma250e_accel_channels,
+		.num_channels = ARRAY_SIZE(bma250e_accel_channels),
+		.scale_table = { {38344, BMC150_ACCEL_DEF_RANGE_2G},
+				 {76590, BMC150_ACCEL_DEF_RANGE_4G},
+				 {153277, BMC150_ACCEL_DEF_RANGE_8G},
+				 {306457, BMC150_ACCEL_DEF_RANGE_16G} },
+	},
+	[bma222e] = {
+		.name = "BMA222E",
+		.chip_id = 0xF8,
+		.channels = bma222e_accel_channels,
+		.num_channels = ARRAY_SIZE(bma222e_accel_channels),
+		.scale_table = { {153277, BMC150_ACCEL_DEF_RANGE_2G},
+				 {306457, BMC150_ACCEL_DEF_RANGE_4G},
+				 {612915, BMC150_ACCEL_DEF_RANGE_8G},
+				 {1225831, BMC150_ACCEL_DEF_RANGE_16G} },
+	},
+	[bma280] = {
+		.name = "BMA0280",
+		.chip_id = 0xFB,
+		.channels = bma280_accel_channels,
+		.num_channels = ARRAY_SIZE(bma280_accel_channels),
+		.scale_table = { {2392, BMC150_ACCEL_DEF_RANGE_2G},
+				 {4785, BMC150_ACCEL_DEF_RANGE_4G},
+				 {9581, BMC150_ACCEL_DEF_RANGE_8G},
+				 {19152, BMC150_ACCEL_DEF_RANGE_16G} },
+	},
+};
+
+static const struct iio_info bmc150_accel_info = {
+	.attrs			= &bmc150_accel_attrs_group,
+	.read_raw		= bmc150_accel_read_raw,
+	.write_raw		= bmc150_accel_write_raw,
+	.read_event_value	= bmc150_accel_read_event,
+	.write_event_value	= bmc150_accel_write_event,
+	.write_event_config	= bmc150_accel_write_event_config,
+	.read_event_config	= bmc150_accel_read_event_config,
+};
+
+static const struct iio_info bmc150_accel_info_fifo = {
+	.attrs			= &bmc150_accel_attrs_group,
+	.read_raw		= bmc150_accel_read_raw,
+	.write_raw		= bmc150_accel_write_raw,
+	.read_event_value	= bmc150_accel_read_event,
+	.write_event_value	= bmc150_accel_write_event,
+	.write_event_config	= bmc150_accel_write_event_config,
+	.read_event_config	= bmc150_accel_read_event_config,
+	.validate_trigger	= bmc150_accel_validate_trigger,
+	.hwfifo_set_watermark	= bmc150_accel_set_watermark,
+	.hwfifo_flush_to_buffer	= bmc150_accel_fifo_flush,
+};
+
+static const unsigned long bmc150_accel_scan_masks[] = {
+					BIT(AXIS_X) | BIT(AXIS_Y) | BIT(AXIS_Z),
+					0};
+
+static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = regmap_bulk_read(data->regmap, BMC150_ACCEL_REG_XOUT_L,
+			       data->buffer, AXIS_MAX * 2);
+	mutex_unlock(&data->mutex);
+	if (ret < 0)
+		goto err_read;
+
+	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
+					   pf->timestamp);
+err_read:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int bmc150_accel_trig_try_reen(struct iio_trigger *trig)
+{
+	struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig);
+	struct bmc150_accel_data *data = t->data;
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret;
+
+	/* new data interrupts don't need ack */
+	if (t == &t->data->triggers[BMC150_ACCEL_TRIGGER_DATA_READY])
+		return 0;
+
+	mutex_lock(&data->mutex);
+	/* clear any latched interrupt */
+	ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH,
+			   BMC150_ACCEL_INT_MODE_LATCH_INT |
+			   BMC150_ACCEL_INT_MODE_LATCH_RESET);
+	mutex_unlock(&data->mutex);
+	if (ret < 0) {
+		dev_err(dev, "Error writing reg_int_rst_latch\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int bmc150_accel_trigger_set_state(struct iio_trigger *trig,
+					  bool state)
+{
+	struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig);
+	struct bmc150_accel_data *data = t->data;
+	int ret;
+
+	mutex_lock(&data->mutex);
+
+	if (t->enabled == state) {
+		mutex_unlock(&data->mutex);
+		return 0;
+	}
+
+	if (t->setup) {
+		ret = t->setup(t, state);
+		if (ret < 0) {
+			mutex_unlock(&data->mutex);
+			return ret;
+		}
+	}
+
+	ret = bmc150_accel_set_interrupt(data, t->intr, state);
+	if (ret < 0) {
+		mutex_unlock(&data->mutex);
+		return ret;
+	}
+
+	t->enabled = state;
+
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static const struct iio_trigger_ops bmc150_accel_trigger_ops = {
+	.set_trigger_state = bmc150_accel_trigger_set_state,
+	.try_reenable = bmc150_accel_trig_try_reen,
+};
+
+static int bmc150_accel_handle_roc_event(struct iio_dev *indio_dev)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	struct device *dev = regmap_get_device(data->regmap);
+	int dir;
+	int ret;
+	unsigned int val;
+
+	ret = regmap_read(data->regmap, BMC150_ACCEL_REG_INT_STATUS_2, &val);
+	if (ret < 0) {
+		dev_err(dev, "Error reading reg_int_status_2\n");
+		return ret;
+	}
+
+	if (val & BMC150_ACCEL_ANY_MOTION_BIT_SIGN)
+		dir = IIO_EV_DIR_FALLING;
+	else
+		dir = IIO_EV_DIR_RISING;
+
+	if (val & BMC150_ACCEL_ANY_MOTION_BIT_X)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_X,
+						  IIO_EV_TYPE_ROC,
+						  dir),
+			       data->timestamp);
+
+	if (val & BMC150_ACCEL_ANY_MOTION_BIT_Y)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_Y,
+						  IIO_EV_TYPE_ROC,
+						  dir),
+			       data->timestamp);
+
+	if (val & BMC150_ACCEL_ANY_MOTION_BIT_Z)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_Z,
+						  IIO_EV_TYPE_ROC,
+						  dir),
+			       data->timestamp);
+
+	return ret;
+}
+
+static irqreturn_t bmc150_accel_irq_thread_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	struct device *dev = regmap_get_device(data->regmap);
+	bool ack = false;
+	int ret;
+
+	mutex_lock(&data->mutex);
+
+	if (data->fifo_mode) {
+		ret = __bmc150_accel_fifo_flush(indio_dev,
+						BMC150_ACCEL_FIFO_LENGTH, true);
+		if (ret > 0)
+			ack = true;
+	}
+
+	if (data->ev_enable_state) {
+		ret = bmc150_accel_handle_roc_event(indio_dev);
+		if (ret > 0)
+			ack = true;
+	}
+
+	if (ack) {
+		ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH,
+				   BMC150_ACCEL_INT_MODE_LATCH_INT |
+				   BMC150_ACCEL_INT_MODE_LATCH_RESET);
+		if (ret)
+			dev_err(dev, "Error writing reg_int_rst_latch\n");
+
+		ret = IRQ_HANDLED;
+	} else {
+		ret = IRQ_NONE;
+	}
+
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static irqreturn_t bmc150_accel_irq_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	bool ack = false;
+	int i;
+
+	data->old_timestamp = data->timestamp;
+	data->timestamp = iio_get_time_ns(indio_dev);
+
+	for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
+		if (data->triggers[i].enabled) {
+			iio_trigger_poll(data->triggers[i].indio_trig);
+			ack = true;
+			break;
+		}
+	}
+
+	if (data->ev_enable_state || data->fifo_mode)
+		return IRQ_WAKE_THREAD;
+
+	if (ack)
+		return IRQ_HANDLED;
+
+	return IRQ_NONE;
+}
+
+static const struct {
+	int intr;
+	const char *name;
+	int (*setup)(struct bmc150_accel_trigger *t, bool state);
+} bmc150_accel_triggers[BMC150_ACCEL_TRIGGERS] = {
+	{
+		.intr = 0,
+		.name = "%s-dev%d",
+	},
+	{
+		.intr = 1,
+		.name = "%s-any-motion-dev%d",
+		.setup = bmc150_accel_any_motion_setup,
+	},
+};
+
+static void bmc150_accel_unregister_triggers(struct bmc150_accel_data *data,
+					     int from)
+{
+	int i;
+
+	for (i = from; i >= 0; i--) {
+		if (data->triggers[i].indio_trig) {
+			iio_trigger_unregister(data->triggers[i].indio_trig);
+			data->triggers[i].indio_trig = NULL;
+		}
+	}
+}
+
+static int bmc150_accel_triggers_setup(struct iio_dev *indio_dev,
+				       struct bmc150_accel_data *data)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	int i, ret;
+
+	for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
+		struct bmc150_accel_trigger *t = &data->triggers[i];
+
+		t->indio_trig = devm_iio_trigger_alloc(dev,
+					bmc150_accel_triggers[i].name,
+						       indio_dev->name,
+						       indio_dev->id);
+		if (!t->indio_trig) {
+			ret = -ENOMEM;
+			break;
+		}
+
+		t->indio_trig->dev.parent = dev;
+		t->indio_trig->ops = &bmc150_accel_trigger_ops;
+		t->intr = bmc150_accel_triggers[i].intr;
+		t->data = data;
+		t->setup = bmc150_accel_triggers[i].setup;
+		iio_trigger_set_drvdata(t->indio_trig, t);
+
+		ret = iio_trigger_register(t->indio_trig);
+		if (ret)
+			break;
+	}
+
+	if (ret)
+		bmc150_accel_unregister_triggers(data, i - 1);
+
+	return ret;
+}
+
+#define BMC150_ACCEL_FIFO_MODE_STREAM          0x80
+#define BMC150_ACCEL_FIFO_MODE_FIFO            0x40
+#define BMC150_ACCEL_FIFO_MODE_BYPASS          0x00
+
+static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	u8 reg = BMC150_ACCEL_REG_FIFO_CONFIG1;
+	int ret;
+
+	ret = regmap_write(data->regmap, reg, data->fifo_mode);
+	if (ret < 0) {
+		dev_err(dev, "Error writing reg_fifo_config1\n");
+		return ret;
+	}
+
+	if (!data->fifo_mode)
+		return 0;
+
+	ret = regmap_write(data->regmap, BMC150_ACCEL_REG_FIFO_CONFIG0,
+			   data->watermark);
+	if (ret < 0)
+		dev_err(dev, "Error writing reg_fifo_config0\n");
+
+	return ret;
+}
+
+static int bmc150_accel_buffer_preenable(struct iio_dev *indio_dev)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	return bmc150_accel_set_power_state(data, true);
+}
+
+static int bmc150_accel_buffer_postenable(struct iio_dev *indio_dev)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int ret = 0;
+
+	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
+		return 0;
+
+	mutex_lock(&data->mutex);
+
+	if (!data->watermark)
+		goto out;
+
+	ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK,
+					 true);
+	if (ret)
+		goto out;
+
+	data->fifo_mode = BMC150_ACCEL_FIFO_MODE_FIFO;
+
+	ret = bmc150_accel_fifo_set_mode(data);
+	if (ret) {
+		data->fifo_mode = 0;
+		bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK,
+					   false);
+	}
+
+out:
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static int bmc150_accel_buffer_predisable(struct iio_dev *indio_dev)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
+		return 0;
+
+	mutex_lock(&data->mutex);
+
+	if (!data->fifo_mode)
+		goto out;
+
+	bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, false);
+	__bmc150_accel_fifo_flush(indio_dev, BMC150_ACCEL_FIFO_LENGTH, false);
+	data->fifo_mode = 0;
+	bmc150_accel_fifo_set_mode(data);
+
+out:
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+static int bmc150_accel_buffer_postdisable(struct iio_dev *indio_dev)
+{
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	return bmc150_accel_set_power_state(data, false);
+}
+
+static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = {
+	.preenable = bmc150_accel_buffer_preenable,
+	.postenable = bmc150_accel_buffer_postenable,
+	.predisable = bmc150_accel_buffer_predisable,
+	.postdisable = bmc150_accel_buffer_postdisable,
+};
+
+static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
+{
+	struct device *dev = regmap_get_device(data->regmap);
+	int ret, i;
+	unsigned int val;
+
+	/*
+	 * Reset chip to get it in a known good state. A delay of 1.8ms after
+	 * reset is required according to the data sheets of supported chips.
+	 */
+	regmap_write(data->regmap, BMC150_ACCEL_REG_RESET,
+		     BMC150_ACCEL_RESET_VAL);
+	usleep_range(1800, 2500);
+
+	ret = regmap_read(data->regmap, BMC150_ACCEL_REG_CHIP_ID, &val);
+	if (ret < 0) {
+		dev_err(dev, "Error: Reading chip id\n");
+		return ret;
+	}
+
+	dev_dbg(dev, "Chip Id %x\n", val);
+	for (i = 0; i < ARRAY_SIZE(bmc150_accel_chip_info_tbl); i++) {
+		if (bmc150_accel_chip_info_tbl[i].chip_id == val) {
+			data->chip_info = &bmc150_accel_chip_info_tbl[i];
+			break;
+		}
+	}
+
+	if (!data->chip_info) {
+		dev_err(dev, "Invalid chip %x\n", val);
+		return -ENODEV;
+	}
+
+	ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
+	if (ret < 0)
+		return ret;
+
+	/* Set Bandwidth */
+	ret = bmc150_accel_set_bw(data, BMC150_ACCEL_DEF_BW, 0);
+	if (ret < 0)
+		return ret;
+
+	/* Set Default Range */
+	ret = regmap_write(data->regmap, BMC150_ACCEL_REG_PMU_RANGE,
+			   BMC150_ACCEL_DEF_RANGE_4G);
+	if (ret < 0) {
+		dev_err(dev, "Error writing reg_pmu_range\n");
+		return ret;
+	}
+
+	data->range = BMC150_ACCEL_DEF_RANGE_4G;
+
+	/* Set default slope duration and thresholds */
+	data->slope_thres = BMC150_ACCEL_DEF_SLOPE_THRESHOLD;
+	data->slope_dur = BMC150_ACCEL_DEF_SLOPE_DURATION;
+	ret = bmc150_accel_update_slope(data);
+	if (ret < 0)
+		return ret;
+
+	/* Set default as latched interrupts */
+	ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH,
+			   BMC150_ACCEL_INT_MODE_LATCH_INT |
+			   BMC150_ACCEL_INT_MODE_LATCH_RESET);
+	if (ret < 0) {
+		dev_err(dev, "Error writing reg_int_rst_latch\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
+			    const char *name, bool block_supported)
+{
+	struct bmc150_accel_data *data;
+	struct iio_dev *indio_dev;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	dev_set_drvdata(dev, indio_dev);
+	data->irq = irq;
+
+	data->regmap = regmap;
+
+	ret = iio_read_mount_matrix(dev, "mount-matrix",
+				     &data->orientation);
+	if (ret)
+		return ret;
+
+	ret = bmc150_accel_chip_init(data);
+	if (ret < 0)
+		return ret;
+
+	mutex_init(&data->mutex);
+
+	indio_dev->channels = data->chip_info->channels;
+	indio_dev->num_channels = data->chip_info->num_channels;
+	indio_dev->name = name ? name : data->chip_info->name;
+	indio_dev->available_scan_masks = bmc150_accel_scan_masks;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &bmc150_accel_info;
+
+	ret = iio_triggered_buffer_setup(indio_dev,
+					 &iio_pollfunc_store_time,
+					 bmc150_accel_trigger_handler,
+					 &bmc150_accel_buffer_ops);
+	if (ret < 0) {
+		dev_err(dev, "Failed: iio triggered buffer setup\n");
+		return ret;
+	}
+
+	if (data->irq > 0) {
+		ret = devm_request_threaded_irq(
+						dev, data->irq,
+						bmc150_accel_irq_handler,
+						bmc150_accel_irq_thread_handler,
+						IRQF_TRIGGER_RISING,
+						BMC150_ACCEL_IRQ_NAME,
+						indio_dev);
+		if (ret)
+			goto err_buffer_cleanup;
+
+		/*
+		 * Set latched mode interrupt. While certain interrupts are
+		 * non-latched regardless of this settings (e.g. new data) we
+		 * want to use latch mode when we can to prevent interrupt
+		 * flooding.
+		 */
+		ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH,
+				   BMC150_ACCEL_INT_MODE_LATCH_RESET);
+		if (ret < 0) {
+			dev_err(dev, "Error writing reg_int_rst_latch\n");
+			goto err_buffer_cleanup;
+		}
+
+		bmc150_accel_interrupts_setup(indio_dev, data);
+
+		ret = bmc150_accel_triggers_setup(indio_dev, data);
+		if (ret)
+			goto err_buffer_cleanup;
+
+		if (block_supported) {
+			indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
+			indio_dev->info = &bmc150_accel_info_fifo;
+			iio_buffer_set_attrs(indio_dev->buffer,
+					     bmc150_accel_fifo_attributes);
+		}
+	}
+
+	ret = pm_runtime_set_active(dev);
+	if (ret)
+		goto err_trigger_unregister;
+
+	pm_runtime_enable(dev);
+	pm_runtime_set_autosuspend_delay(dev, BMC150_AUTO_SUSPEND_DELAY_MS);
+	pm_runtime_use_autosuspend(dev);
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(dev, "Unable to register iio device\n");
+		goto err_pm_cleanup;
+	}
+
+	return 0;
+
+err_pm_cleanup:
+	pm_runtime_dont_use_autosuspend(dev);
+	pm_runtime_disable(dev);
+err_trigger_unregister:
+	bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
+err_buffer_cleanup:
+	iio_triggered_buffer_cleanup(indio_dev);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(bmc150_accel_core_probe);
+
+int bmc150_accel_core_remove(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	pm_runtime_disable(dev);
+	pm_runtime_set_suspended(dev);
+	pm_runtime_put_noidle(dev);
+
+	bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
+
+	iio_triggered_buffer_cleanup(indio_dev);
+
+	mutex_lock(&data->mutex);
+	bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0);
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(bmc150_accel_core_remove);
+
+#ifdef CONFIG_PM_SLEEP
+static int bmc150_accel_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	mutex_lock(&data->mutex);
+	bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0);
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+static int bmc150_accel_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+	mutex_lock(&data->mutex);
+	bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
+	bmc150_accel_fifo_set_mode(data);
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_PM
+static int bmc150_accel_runtime_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0);
+	if (ret < 0)
+		return -EAGAIN;
+
+	return 0;
+}
+
+static int bmc150_accel_runtime_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct bmc150_accel_data *data = iio_priv(indio_dev);
+	int ret;
+	int sleep_val;
+
+	ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
+	if (ret < 0)
+		return ret;
+	ret = bmc150_accel_fifo_set_mode(data);
+	if (ret < 0)
+		return ret;
+
+	sleep_val = bmc150_accel_get_startup_times(data);
+	if (sleep_val < 20)
+		usleep_range(sleep_val * 1000, 20000);
+	else
+		msleep_interruptible(sleep_val);
+
+	return 0;
+}
+#endif
+
+const struct dev_pm_ops bmc150_accel_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(bmc150_accel_suspend, bmc150_accel_resume)
+	SET_RUNTIME_PM_OPS(bmc150_accel_runtime_suspend,
+			   bmc150_accel_runtime_resume, NULL)
+};
+EXPORT_SYMBOL_GPL(bmc150_accel_pm_ops);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMC150 accelerometer driver");
diff --git a/drivers/iio/accel/bmc150-accel-i2c.c b/drivers/iio/accel/bmc150-accel-i2c.c
new file mode 100644
index 000000000..06021c868
--- /dev/null
+++ b/drivers/iio/accel/bmc150-accel-i2c.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 3-axis accelerometer driver supporting following I2C Bosch-Sensortec chips:
+ *  - BMC150
+ *  - BMI055
+ *  - BMA255
+ *  - BMA250E
+ *  - BMA222E
+ *  - BMA280
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ */
+
+#include <linux/device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/regmap.h>
+
+#include "bmc150-accel.h"
+
+static int bmc150_accel_probe(struct i2c_client *client,
+			      const struct i2c_device_id *id)
+{
+	struct regmap *regmap;
+	const char *name = NULL;
+	bool block_supported =
+		i2c_check_functionality(client->adapter, I2C_FUNC_I2C) ||
+		i2c_check_functionality(client->adapter,
+					I2C_FUNC_SMBUS_READ_I2C_BLOCK);
+
+	regmap = devm_regmap_init_i2c(client, &bmc150_regmap_conf);
+	if (IS_ERR(regmap)) {
+		dev_err(&client->dev, "Failed to initialize i2c regmap\n");
+		return PTR_ERR(regmap);
+	}
+
+	if (id)
+		name = id->name;
+
+	return bmc150_accel_core_probe(&client->dev, regmap, client->irq, name,
+				       block_supported);
+}
+
+static int bmc150_accel_remove(struct i2c_client *client)
+{
+	return bmc150_accel_core_remove(&client->dev);
+}
+
+static const struct acpi_device_id bmc150_accel_acpi_match[] = {
+	{"BSBA0150",	bmc150},
+	{"BMC150A",	bmc150},
+	{"BMI055A",	bmi055},
+	{"BMA0255",	bma255},
+	{"BMA250E",	bma250e},
+	{"BMA222E",	bma222e},
+	{"BMA0280",	bma280},
+	{"BOSC0200"},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, bmc150_accel_acpi_match);
+
+static const struct i2c_device_id bmc150_accel_id[] = {
+	{"bmc150_accel",	bmc150},
+	{"bmi055_accel",	bmi055},
+	{"bma255",		bma255},
+	{"bma250e",		bma250e},
+	{"bma222e",		bma222e},
+	{"bma280",		bma280},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, bmc150_accel_id);
+
+static const struct of_device_id bmc150_accel_of_match[] = {
+	{ .compatible = "bosch,bmc150_accel" },
+	{ .compatible = "bosch,bmi055_accel" },
+	{ .compatible = "bosch,bma255" },
+	{ .compatible = "bosch,bma250e" },
+	{ .compatible = "bosch,bma222e" },
+	{ .compatible = "bosch,bma280" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, bmc150_accel_of_match);
+
+static struct i2c_driver bmc150_accel_driver = {
+	.driver = {
+		.name	= "bmc150_accel_i2c",
+		.of_match_table = bmc150_accel_of_match,
+		.acpi_match_table = ACPI_PTR(bmc150_accel_acpi_match),
+		.pm	= &bmc150_accel_pm_ops,
+	},
+	.probe		= bmc150_accel_probe,
+	.remove		= bmc150_accel_remove,
+	.id_table	= bmc150_accel_id,
+};
+module_i2c_driver(bmc150_accel_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMC150 I2C accelerometer driver");
diff --git a/drivers/iio/accel/bmc150-accel-spi.c b/drivers/iio/accel/bmc150-accel-spi.c
new file mode 100644
index 000000000..2a8c311d6
--- /dev/null
+++ b/drivers/iio/accel/bmc150-accel-spi.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 3-axis accelerometer driver supporting SPI Bosch-Sensortec accelerometer chip
+ * Copyright © 2015 Pengutronix, Markus Pargmann <mpa@pengutronix.de>
+ */
+
+#include <linux/device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include "bmc150-accel.h"
+
+static int bmc150_accel_probe(struct spi_device *spi)
+{
+	struct regmap *regmap;
+	const struct spi_device_id *id = spi_get_device_id(spi);
+
+	regmap = devm_regmap_init_spi(spi, &bmc150_regmap_conf);
+	if (IS_ERR(regmap)) {
+		dev_err(&spi->dev, "Failed to initialize spi regmap\n");
+		return PTR_ERR(regmap);
+	}
+
+	return bmc150_accel_core_probe(&spi->dev, regmap, spi->irq, id->name,
+				       true);
+}
+
+static int bmc150_accel_remove(struct spi_device *spi)
+{
+	return bmc150_accel_core_remove(&spi->dev);
+}
+
+static const struct acpi_device_id bmc150_accel_acpi_match[] = {
+	{"BSBA0150",	bmc150},
+	{"BMC150A",	bmc150},
+	{"BMI055A",	bmi055},
+	{"BMA0255",	bma255},
+	{"BMA250E",	bma250e},
+	{"BMA222E",	bma222e},
+	{"BMA0280",	bma280},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, bmc150_accel_acpi_match);
+
+static const struct spi_device_id bmc150_accel_id[] = {
+	{"bmc150_accel",	bmc150},
+	{"bmi055_accel",	bmi055},
+	{"bma255",		bma255},
+	{"bma250e",		bma250e},
+	{"bma222e",		bma222e},
+	{"bma280",		bma280},
+	{}
+};
+MODULE_DEVICE_TABLE(spi, bmc150_accel_id);
+
+static struct spi_driver bmc150_accel_driver = {
+	.driver = {
+		.name	= "bmc150_accel_spi",
+		.acpi_match_table = ACPI_PTR(bmc150_accel_acpi_match),
+		.pm	= &bmc150_accel_pm_ops,
+	},
+	.probe		= bmc150_accel_probe,
+	.remove		= bmc150_accel_remove,
+	.id_table	= bmc150_accel_id,
+};
+module_spi_driver(bmc150_accel_driver);
+
+MODULE_AUTHOR("Markus Pargmann <mpa@pengutronix.de>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMC150 SPI accelerometer driver");
diff --git a/drivers/iio/accel/bmc150-accel.h b/drivers/iio/accel/bmc150-accel.h
new file mode 100644
index 000000000..ae6118ae1
--- /dev/null
+++ b/drivers/iio/accel/bmc150-accel.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BMC150_ACCEL_H_
+#define _BMC150_ACCEL_H_
+
+struct regmap;
+
+enum {
+	bmc150,
+	bmi055,
+	bma255,
+	bma250e,
+	bma222e,
+	bma280,
+};
+
+int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
+			    const char *name, bool block_supported);
+int bmc150_accel_core_remove(struct device *dev);
+extern const struct dev_pm_ops bmc150_accel_pm_ops;
+extern const struct regmap_config bmc150_regmap_conf;
+
+#endif  /* _BMC150_ACCEL_H_ */
diff --git a/drivers/iio/accel/cros_ec_accel_legacy.c b/drivers/iio/accel/cros_ec_accel_legacy.c
new file mode 100644
index 000000000..8f1232c38
--- /dev/null
+++ b/drivers/iio/accel/cros_ec_accel_legacy.c
@@ -0,0 +1,252 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for older Chrome OS EC accelerometer
+ *
+ * Copyright 2017 Google, Inc
+ *
+ * This driver uses the memory mapper cros-ec interface to communicate
+ * with the Chrome OS EC about accelerometer data or older commands.
+ * Accelerometer access is presented through iio sysfs.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/common/cros_ec_sensors_core.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/platform_data/cros_ec_commands.h>
+#include <linux/platform_data/cros_ec_proto.h>
+#include <linux/platform_device.h>
+
+#define DRV_NAME	"cros-ec-accel-legacy"
+
+#define CROS_EC_SENSOR_LEGACY_NUM 2
+/*
+ * Sensor scale hard coded at 10 bits per g, computed as:
+ * g / (2^10 - 1) = 0.009586168; with g = 9.80665 m.s^-2
+ */
+#define ACCEL_LEGACY_NSCALE 9586168
+
+/*
+ * Sensor frequency is hard-coded to 10Hz.
+ */
+static const int cros_ec_legacy_sample_freq[] = { 10, 0 };
+
+static int cros_ec_accel_legacy_read_cmd(struct iio_dev *indio_dev,
+				  unsigned long scan_mask, s16 *data)
+{
+	struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
+	int ret;
+	unsigned int i;
+	u8 sensor_num;
+
+	/*
+	 * Read all sensor data through a command.
+	 * Save sensor_num, it is assumed to stay.
+	 */
+	sensor_num = st->param.info.sensor_num;
+	st->param.cmd = MOTIONSENSE_CMD_DUMP;
+	st->param.dump.max_sensor_count = CROS_EC_SENSOR_LEGACY_NUM;
+	ret = cros_ec_motion_send_host_cmd(st,
+			sizeof(st->resp->dump) + CROS_EC_SENSOR_LEGACY_NUM *
+			sizeof(struct ec_response_motion_sensor_data));
+	st->param.info.sensor_num = sensor_num;
+	if (ret != 0) {
+		dev_warn(&indio_dev->dev, "Unable to read sensor data\n");
+		return ret;
+	}
+
+	for_each_set_bit(i, &scan_mask, indio_dev->masklength) {
+		*data = st->resp->dump.sensor[sensor_num].data[i] *
+			st->sign[i];
+		data++;
+	}
+
+	return 0;
+}
+
+static int cros_ec_accel_legacy_read(struct iio_dev *indio_dev,
+				     struct iio_chan_spec const *chan,
+				     int *val, int *val2, long mask)
+{
+	struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
+	s16 data = 0;
+	int ret;
+	int idx = chan->scan_index;
+
+	mutex_lock(&st->cmd_lock);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = st->read_ec_sensors_data(indio_dev, 1 << idx, &data);
+		if (ret < 0)
+			break;
+		ret = IIO_VAL_INT;
+		*val = data;
+		break;
+	case IIO_CHAN_INFO_SCALE:
+		WARN_ON(st->type != MOTIONSENSE_TYPE_ACCEL);
+		*val = 0;
+		*val2 = ACCEL_LEGACY_NSCALE;
+		ret = IIO_VAL_INT_PLUS_NANO;
+		break;
+	case IIO_CHAN_INFO_CALIBBIAS:
+		/* Calibration not supported. */
+		*val = 0;
+		ret = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		*val = cros_ec_legacy_sample_freq[0];
+		*val2 = cros_ec_legacy_sample_freq[1];
+		ret = IIO_VAL_INT_PLUS_MICRO;
+		break;
+	default:
+		ret = cros_ec_sensors_core_read(st, chan, val, val2,
+				mask);
+		break;
+	}
+	mutex_unlock(&st->cmd_lock);
+
+	return ret;
+}
+
+static int cros_ec_accel_legacy_write(struct iio_dev *indio_dev,
+				      struct iio_chan_spec const *chan,
+				      int val, int val2, long mask)
+{
+	/*
+	 * Do nothing but don't return an error code to allow calibration
+	 * script to work.
+	 */
+	if (mask == IIO_CHAN_INFO_CALIBBIAS)
+		return 0;
+
+	return -EINVAL;
+}
+
+/**
+ * cros_ec_accel_legacy_read_avail() - get available values
+ * @indio_dev:		pointer to state information for device
+ * @chan:	channel specification structure table
+ * @vals:	list of available values
+ * @type:	type of data returned
+ * @length:	number of data returned in the array
+ * @mask:	specifies which values to be requested
+ *
+ * Return:	an error code or IIO_AVAIL_LIST
+ */
+static int cros_ec_accel_legacy_read_avail(struct iio_dev *indio_dev,
+					   struct iio_chan_spec const *chan,
+					   const int **vals,
+					   int *type,
+					   int *length,
+					   long mask)
+{
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		*length = ARRAY_SIZE(cros_ec_legacy_sample_freq);
+		*vals = cros_ec_legacy_sample_freq;
+		*type = IIO_VAL_INT_PLUS_MICRO;
+		return IIO_AVAIL_LIST;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info cros_ec_accel_legacy_info = {
+	.read_raw = &cros_ec_accel_legacy_read,
+	.write_raw = &cros_ec_accel_legacy_write,
+	.read_avail = &cros_ec_accel_legacy_read_avail,
+};
+
+/*
+ * Present the channel using HTML5 standard:
+ * need to invert X and Y and invert some lid axis.
+ */
+#define CROS_EC_ACCEL_ROTATE_AXIS(_axis)				\
+	((_axis) == CROS_EC_SENSOR_Z ? CROS_EC_SENSOR_Z :		\
+	 ((_axis) == CROS_EC_SENSOR_X ? CROS_EC_SENSOR_Y :		\
+	  CROS_EC_SENSOR_X))
+
+#define CROS_EC_ACCEL_LEGACY_CHAN(_axis)				\
+	{								\
+		.type = IIO_ACCEL,					\
+		.channel2 = IIO_MOD_X + (_axis),			\
+		.modified = 1,					        \
+		.info_mask_separate =					\
+			BIT(IIO_CHAN_INFO_RAW) |			\
+			BIT(IIO_CHAN_INFO_CALIBBIAS),			\
+		.info_mask_shared_by_all =				\
+			BIT(IIO_CHAN_INFO_SCALE) |			\
+			BIT(IIO_CHAN_INFO_SAMP_FREQ),			\
+		.info_mask_shared_by_all_available =			\
+			BIT(IIO_CHAN_INFO_SAMP_FREQ),			\
+		.ext_info = cros_ec_sensors_ext_info,			\
+		.scan_type = {						\
+			.sign = 's',					\
+			.realbits = CROS_EC_SENSOR_BITS,		\
+			.storagebits = CROS_EC_SENSOR_BITS,		\
+		},							\
+		.scan_index = CROS_EC_ACCEL_ROTATE_AXIS(_axis),		\
+	}								\
+
+static const struct iio_chan_spec cros_ec_accel_legacy_channels[] = {
+		CROS_EC_ACCEL_LEGACY_CHAN(CROS_EC_SENSOR_X),
+		CROS_EC_ACCEL_LEGACY_CHAN(CROS_EC_SENSOR_Y),
+		CROS_EC_ACCEL_LEGACY_CHAN(CROS_EC_SENSOR_Z),
+		IIO_CHAN_SOFT_TIMESTAMP(CROS_EC_SENSOR_MAX_AXIS)
+};
+
+static int cros_ec_accel_legacy_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct iio_dev *indio_dev;
+	struct cros_ec_sensors_core_state *state;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*state));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	ret = cros_ec_sensors_core_init(pdev, indio_dev, true,
+					cros_ec_sensors_capture, NULL, false);
+	if (ret)
+		return ret;
+
+	indio_dev->info = &cros_ec_accel_legacy_info;
+	state = iio_priv(indio_dev);
+
+	if (state->ec->cmd_readmem != NULL)
+		state->read_ec_sensors_data = cros_ec_sensors_read_lpc;
+	else
+		state->read_ec_sensors_data = cros_ec_accel_legacy_read_cmd;
+
+	indio_dev->channels = cros_ec_accel_legacy_channels;
+	indio_dev->num_channels = ARRAY_SIZE(cros_ec_accel_legacy_channels);
+	/* The lid sensor needs to be presented inverted. */
+	if (state->loc == MOTIONSENSE_LOC_LID) {
+		state->sign[CROS_EC_SENSOR_X] = -1;
+		state->sign[CROS_EC_SENSOR_Z] = -1;
+	}
+
+	return devm_iio_device_register(dev, indio_dev);
+}
+
+static struct platform_driver cros_ec_accel_platform_driver = {
+	.driver = {
+		.name	= DRV_NAME,
+	},
+	.probe		= cros_ec_accel_legacy_probe,
+};
+module_platform_driver(cros_ec_accel_platform_driver);
+
+MODULE_DESCRIPTION("ChromeOS EC legacy accelerometer driver");
+MODULE_AUTHOR("Gwendal Grignou <gwendal@chromium.org>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/drivers/iio/accel/da280.c b/drivers/iio/accel/da280.c
new file mode 100644
index 000000000..4472dde68
--- /dev/null
+++ b/drivers/iio/accel/da280.c
@@ -0,0 +1,205 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**
+ * IIO driver for the MiraMEMS DA280 3-axis accelerometer and
+ * IIO driver for the MiraMEMS DA226 2-axis accelerometer
+ *
+ * Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com>
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/acpi.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/byteorder/generic.h>
+
+#define DA280_REG_CHIP_ID		0x01
+#define DA280_REG_ACC_X_LSB		0x02
+#define DA280_REG_ACC_Y_LSB		0x04
+#define DA280_REG_ACC_Z_LSB		0x06
+#define DA280_REG_MODE_BW		0x11
+
+#define DA280_CHIP_ID			0x13
+#define DA280_MODE_ENABLE		0x1e
+#define DA280_MODE_DISABLE		0x9e
+
+enum da280_chipset { da226, da280 };
+
+/*
+ * a value of + or -4096 corresponds to + or - 1G
+ * scale = 9.81 / 4096 = 0.002395019
+ */
+
+static const int da280_nscale = 2395019;
+
+#define DA280_CHANNEL(reg, axis) {	\
+	.type = IIO_ACCEL,	\
+	.address = reg,	\
+	.modified = 1,	\
+	.channel2 = IIO_MOD_##axis,	\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+}
+
+static const struct iio_chan_spec da280_channels[] = {
+	DA280_CHANNEL(DA280_REG_ACC_X_LSB, X),
+	DA280_CHANNEL(DA280_REG_ACC_Y_LSB, Y),
+	DA280_CHANNEL(DA280_REG_ACC_Z_LSB, Z),
+};
+
+struct da280_data {
+	struct i2c_client *client;
+};
+
+static int da280_enable(struct i2c_client *client, bool enable)
+{
+	u8 data = enable ? DA280_MODE_ENABLE : DA280_MODE_DISABLE;
+
+	return i2c_smbus_write_byte_data(client, DA280_REG_MODE_BW, data);
+}
+
+static int da280_read_raw(struct iio_dev *indio_dev,
+				struct iio_chan_spec const *chan,
+				int *val, int *val2, long mask)
+{
+	struct da280_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = i2c_smbus_read_word_data(data->client, chan->address);
+		if (ret < 0)
+			return ret;
+		/*
+		 * Values are 14 bits, stored as 16 bits with the 2
+		 * least significant bits always 0.
+		 */
+		*val = (short)ret >> 2;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = da280_nscale;
+		return IIO_VAL_INT_PLUS_NANO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info da280_info = {
+	.read_raw	= da280_read_raw,
+};
+
+static enum da280_chipset da280_match_acpi_device(struct device *dev)
+{
+	const struct acpi_device_id *id;
+
+	id = acpi_match_device(dev->driver->acpi_match_table, dev);
+	if (!id)
+		return -EINVAL;
+
+	return (enum da280_chipset) id->driver_data;
+}
+
+static int da280_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct da280_data *data;
+	enum da280_chipset chip;
+
+	ret = i2c_smbus_read_byte_data(client, DA280_REG_CHIP_ID);
+	if (ret != DA280_CHIP_ID)
+		return (ret < 0) ? ret : -ENODEV;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	i2c_set_clientdata(client, indio_dev);
+
+	indio_dev->info = &da280_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = da280_channels;
+
+	if (ACPI_HANDLE(&client->dev)) {
+		chip = da280_match_acpi_device(&client->dev);
+	} else {
+		chip = id->driver_data;
+	}
+
+	if (chip == da226) {
+		indio_dev->name = "da226";
+		indio_dev->num_channels = 2;
+	} else {
+		indio_dev->name = "da280";
+		indio_dev->num_channels = 3;
+	}
+
+	ret = da280_enable(client, true);
+	if (ret < 0)
+		return ret;
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "device_register failed\n");
+		da280_enable(client, false);
+	}
+
+	return ret;
+}
+
+static int da280_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+	iio_device_unregister(indio_dev);
+
+	return da280_enable(client, false);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int da280_suspend(struct device *dev)
+{
+	return da280_enable(to_i2c_client(dev), false);
+}
+
+static int da280_resume(struct device *dev)
+{
+	return da280_enable(to_i2c_client(dev), true);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(da280_pm_ops, da280_suspend, da280_resume);
+
+static const struct acpi_device_id da280_acpi_match[] = {
+	{"MIRAACC", da280},
+	{},
+};
+MODULE_DEVICE_TABLE(acpi, da280_acpi_match);
+
+static const struct i2c_device_id da280_i2c_id[] = {
+	{ "da226", da226 },
+	{ "da280", da280 },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, da280_i2c_id);
+
+static struct i2c_driver da280_driver = {
+	.driver = {
+		.name = "da280",
+		.acpi_match_table = ACPI_PTR(da280_acpi_match),
+		.pm = &da280_pm_ops,
+	},
+	.probe		= da280_probe,
+	.remove		= da280_remove,
+	.id_table	= da280_i2c_id,
+};
+
+module_i2c_driver(da280_driver);
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("MiraMEMS DA280 3-Axis Accelerometer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/da311.c b/drivers/iio/accel/da311.c
new file mode 100644
index 000000000..3b3df620b
--- /dev/null
+++ b/drivers/iio/accel/da311.c
@@ -0,0 +1,300 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**
+ * IIO driver for the MiraMEMS DA311 3-axis accelerometer
+ *
+ * Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com>
+ * Copyright (c) 2011-2013 MiraMEMS Sensing Technology Co., Ltd.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/byteorder/generic.h>
+
+#define DA311_CHIP_ID			0x13
+
+/*
+ * Note register addressed go from 0 - 0x3f and then wrap.
+ * For some reason there are 2 banks with 0 - 0x3f addresses,
+ * rather then a single 0-0x7f bank.
+ */
+
+/* Bank 0 regs */
+#define DA311_REG_BANK			0x0000
+#define DA311_REG_LDO_REG		0x0006
+#define DA311_REG_CHIP_ID		0x000f
+#define DA311_REG_TEMP_CFG_REG		0x001f
+#define DA311_REG_CTRL_REG1		0x0020
+#define DA311_REG_CTRL_REG3		0x0022
+#define DA311_REG_CTRL_REG4		0x0023
+#define DA311_REG_CTRL_REG5		0x0024
+#define DA311_REG_CTRL_REG6		0x0025
+#define DA311_REG_STATUS_REG		0x0027
+#define DA311_REG_OUT_X_L		0x0028
+#define DA311_REG_OUT_X_H		0x0029
+#define DA311_REG_OUT_Y_L		0x002a
+#define DA311_REG_OUT_Y_H		0x002b
+#define DA311_REG_OUT_Z_L		0x002c
+#define DA311_REG_OUT_Z_H		0x002d
+#define DA311_REG_INT1_CFG		0x0030
+#define DA311_REG_INT1_SRC		0x0031
+#define DA311_REG_INT1_THS		0x0032
+#define DA311_REG_INT1_DURATION		0x0033
+#define DA311_REG_INT2_CFG		0x0034
+#define DA311_REG_INT2_SRC		0x0035
+#define DA311_REG_INT2_THS		0x0036
+#define DA311_REG_INT2_DURATION		0x0037
+#define DA311_REG_CLICK_CFG		0x0038
+#define DA311_REG_CLICK_SRC		0x0039
+#define DA311_REG_CLICK_THS		0x003a
+#define DA311_REG_TIME_LIMIT		0x003b
+#define DA311_REG_TIME_LATENCY		0x003c
+#define DA311_REG_TIME_WINDOW		0x003d
+
+/* Bank 1 regs */
+#define DA311_REG_SOFT_RESET		0x0105
+#define DA311_REG_OTP_XOFF_L		0x0110
+#define DA311_REG_OTP_XOFF_H		0x0111
+#define DA311_REG_OTP_YOFF_L		0x0112
+#define DA311_REG_OTP_YOFF_H		0x0113
+#define DA311_REG_OTP_ZOFF_L		0x0114
+#define DA311_REG_OTP_ZOFF_H		0x0115
+#define DA311_REG_OTP_XSO		0x0116
+#define DA311_REG_OTP_YSO		0x0117
+#define DA311_REG_OTP_ZSO		0x0118
+#define DA311_REG_OTP_TRIM_OSC		0x011b
+#define DA311_REG_LPF_ABSOLUTE		0x011c
+#define DA311_REG_TEMP_OFF1		0x0127
+#define DA311_REG_TEMP_OFF2		0x0128
+#define DA311_REG_TEMP_OFF3		0x0129
+#define DA311_REG_OTP_TRIM_THERM_H	0x011a
+
+/*
+ * a value of + or -1024 corresponds to + or - 1G
+ * scale = 9.81 / 1024 = 0.009580078
+ */
+
+static const int da311_nscale = 9580078;
+
+#define DA311_CHANNEL(reg, axis) {	\
+	.type = IIO_ACCEL,	\
+	.address = reg,	\
+	.modified = 1,	\
+	.channel2 = IIO_MOD_##axis,	\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+}
+
+static const struct iio_chan_spec da311_channels[] = {
+	/* | 0x80 comes from the android driver */
+	DA311_CHANNEL(DA311_REG_OUT_X_L | 0x80, X),
+	DA311_CHANNEL(DA311_REG_OUT_Y_L | 0x80, Y),
+	DA311_CHANNEL(DA311_REG_OUT_Z_L | 0x80, Z),
+};
+
+struct da311_data {
+	struct i2c_client *client;
+};
+
+static int da311_register_mask_write(struct i2c_client *client, u16 addr,
+				     u8 mask, u8 data)
+{
+	int ret;
+	u8 tmp_data = 0;
+
+	if (addr & 0xff00) {
+		/* Select bank 1 */
+		ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x01);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (mask != 0xff) {
+		ret = i2c_smbus_read_byte_data(client, addr);
+		if (ret < 0)
+			return ret;
+		tmp_data = ret;
+	}
+
+	tmp_data &= ~mask;
+	tmp_data |= data & mask;
+	ret = i2c_smbus_write_byte_data(client, addr & 0xff, tmp_data);
+	if (ret < 0)
+		return ret;
+
+	if (addr & 0xff00) {
+		/* Back to bank 0 */
+		ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x00);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+/* Init sequence taken from the android driver */
+static int da311_reset(struct i2c_client *client)
+{
+	static const struct {
+		u16 addr;
+		u8 mask;
+		u8 data;
+	} init_data[] = {
+		{ DA311_REG_TEMP_CFG_REG,       0xff,   0x08 },
+		{ DA311_REG_CTRL_REG5,          0xff,   0x80 },
+		{ DA311_REG_CTRL_REG4,          0x30,   0x00 },
+		{ DA311_REG_CTRL_REG1,          0xff,   0x6f },
+		{ DA311_REG_TEMP_CFG_REG,       0xff,   0x88 },
+		{ DA311_REG_LDO_REG,            0xff,   0x02 },
+		{ DA311_REG_OTP_TRIM_OSC,       0xff,   0x27 },
+		{ DA311_REG_LPF_ABSOLUTE,       0xff,   0x30 },
+		{ DA311_REG_TEMP_OFF1,          0xff,   0x3f },
+		{ DA311_REG_TEMP_OFF2,          0xff,   0xff },
+		{ DA311_REG_TEMP_OFF3,          0xff,   0x0f },
+	};
+	int i, ret;
+
+	/* Reset */
+	ret = da311_register_mask_write(client, DA311_REG_SOFT_RESET,
+					0xff, 0xaa);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < ARRAY_SIZE(init_data); i++) {
+		ret = da311_register_mask_write(client,
+						init_data[i].addr,
+						init_data[i].mask,
+						init_data[i].data);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int da311_enable(struct i2c_client *client, bool enable)
+{
+	u8 data = enable ? 0x00 : 0x20;
+
+	return da311_register_mask_write(client, DA311_REG_TEMP_CFG_REG,
+					 0x20, data);
+}
+
+static int da311_read_raw(struct iio_dev *indio_dev,
+				struct iio_chan_spec const *chan,
+				int *val, int *val2, long mask)
+{
+	struct da311_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = i2c_smbus_read_word_data(data->client, chan->address);
+		if (ret < 0)
+			return ret;
+		/*
+		 * Values are 12 bits, stored as 16 bits with the 4
+		 * least significant bits always 0.
+		 */
+		*val = (short)ret >> 4;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = da311_nscale;
+		return IIO_VAL_INT_PLUS_NANO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info da311_info = {
+	.read_raw	= da311_read_raw,
+};
+
+static int da311_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct da311_data *data;
+
+	ret = i2c_smbus_read_byte_data(client, DA311_REG_CHIP_ID);
+	if (ret != DA311_CHIP_ID)
+		return (ret < 0) ? ret : -ENODEV;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	i2c_set_clientdata(client, indio_dev);
+
+	indio_dev->info = &da311_info;
+	indio_dev->name = "da311";
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = da311_channels;
+	indio_dev->num_channels = ARRAY_SIZE(da311_channels);
+
+	ret = da311_reset(client);
+	if (ret < 0)
+		return ret;
+
+	ret = da311_enable(client, true);
+	if (ret < 0)
+		return ret;
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "device_register failed\n");
+		da311_enable(client, false);
+	}
+
+	return ret;
+}
+
+static int da311_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+	iio_device_unregister(indio_dev);
+
+	return da311_enable(client, false);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int da311_suspend(struct device *dev)
+{
+	return da311_enable(to_i2c_client(dev), false);
+}
+
+static int da311_resume(struct device *dev)
+{
+	return da311_enable(to_i2c_client(dev), true);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(da311_pm_ops, da311_suspend, da311_resume);
+
+static const struct i2c_device_id da311_i2c_id[] = {
+	{"da311", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, da311_i2c_id);
+
+static struct i2c_driver da311_driver = {
+	.driver = {
+		.name = "da311",
+		.pm = &da311_pm_ops,
+	},
+	.probe		= da311_probe,
+	.remove		= da311_remove,
+	.id_table	= da311_i2c_id,
+};
+
+module_i2c_driver(da311_driver);
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("MiraMEMS DA311 3-Axis Accelerometer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/dmard06.c b/drivers/iio/accel/dmard06.c
new file mode 100644
index 000000000..de2868c28
--- /dev/null
+++ b/drivers/iio/accel/dmard06.c
@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * IIO driver for Domintech DMARD06 accelerometer
+ *
+ * Copyright (C) 2016 Aleksei Mamlin <mamlinav@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+
+#define DMARD06_DRV_NAME		"dmard06"
+
+/* Device data registers */
+#define DMARD06_CHIP_ID_REG		0x0f
+#define DMARD06_TOUT_REG		0x40
+#define DMARD06_XOUT_REG		0x41
+#define DMARD06_YOUT_REG		0x42
+#define DMARD06_ZOUT_REG		0x43
+#define DMARD06_CTRL1_REG		0x44
+
+/* Device ID value */
+#define DMARD05_CHIP_ID			0x05
+#define DMARD06_CHIP_ID			0x06
+#define DMARD07_CHIP_ID			0x07
+
+/* Device values */
+#define DMARD05_AXIS_SCALE_VAL		15625
+#define DMARD06_AXIS_SCALE_VAL		31250
+#define DMARD06_TEMP_CENTER_VAL		25
+#define DMARD06_SIGN_BIT		7
+
+/* Device power modes */
+#define DMARD06_MODE_NORMAL		0x27
+#define DMARD06_MODE_POWERDOWN		0x00
+
+/* Device channels */
+#define DMARD06_ACCEL_CHANNEL(_axis, _reg) {			\
+	.type = IIO_ACCEL,					\
+	.address = _reg,					\
+	.channel2 = IIO_MOD_##_axis,				\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+	.modified = 1,						\
+}
+
+#define DMARD06_TEMP_CHANNEL(_reg) {				\
+	.type = IIO_TEMP,					\
+	.address = _reg,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |		\
+			      BIT(IIO_CHAN_INFO_OFFSET),	\
+}
+
+struct dmard06_data {
+	struct i2c_client *client;
+	u8 chip_id;
+};
+
+static const struct iio_chan_spec dmard06_channels[] = {
+	DMARD06_ACCEL_CHANNEL(X, DMARD06_XOUT_REG),
+	DMARD06_ACCEL_CHANNEL(Y, DMARD06_YOUT_REG),
+	DMARD06_ACCEL_CHANNEL(Z, DMARD06_ZOUT_REG),
+	DMARD06_TEMP_CHANNEL(DMARD06_TOUT_REG),
+};
+
+static int dmard06_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct dmard06_data *dmard06 = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = i2c_smbus_read_byte_data(dmard06->client,
+					       chan->address);
+		if (ret < 0) {
+			dev_err(&dmard06->client->dev,
+				"Error reading data: %d\n", ret);
+			return ret;
+		}
+
+		*val = sign_extend32(ret, DMARD06_SIGN_BIT);
+
+		if (dmard06->chip_id == DMARD06_CHIP_ID)
+			*val = *val >> 1;
+
+		switch (chan->type) {
+		case IIO_ACCEL:
+			return IIO_VAL_INT;
+		case IIO_TEMP:
+			if (dmard06->chip_id != DMARD06_CHIP_ID)
+				*val = *val / 2;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_OFFSET:
+		switch (chan->type) {
+		case IIO_TEMP:
+			*val = DMARD06_TEMP_CENTER_VAL;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			*val = 0;
+			if (dmard06->chip_id == DMARD06_CHIP_ID)
+				*val2 = DMARD06_AXIS_SCALE_VAL;
+			else
+				*val2 = DMARD05_AXIS_SCALE_VAL;
+			return IIO_VAL_INT_PLUS_MICRO;
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info dmard06_info = {
+	.read_raw	= dmard06_read_raw,
+};
+
+static int dmard06_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct dmard06_data *dmard06;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		dev_err(&client->dev, "I2C check functionality failed\n");
+		return -ENXIO;
+	}
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*dmard06));
+	if (!indio_dev) {
+		dev_err(&client->dev, "Failed to allocate iio device\n");
+		return -ENOMEM;
+	}
+
+	dmard06 = iio_priv(indio_dev);
+	dmard06->client = client;
+
+	ret = i2c_smbus_read_byte_data(dmard06->client, DMARD06_CHIP_ID_REG);
+	if (ret < 0) {
+		dev_err(&client->dev, "Error reading chip id: %d\n", ret);
+		return ret;
+	}
+
+	if (ret != DMARD05_CHIP_ID && ret != DMARD06_CHIP_ID &&
+	    ret != DMARD07_CHIP_ID) {
+		dev_err(&client->dev, "Invalid chip id: %02d\n", ret);
+		return -ENODEV;
+	}
+
+	dmard06->chip_id = ret;
+
+	i2c_set_clientdata(client, indio_dev);
+	indio_dev->name = DMARD06_DRV_NAME;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = dmard06_channels;
+	indio_dev->num_channels = ARRAY_SIZE(dmard06_channels);
+	indio_dev->info = &dmard06_info;
+
+	return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int dmard06_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct dmard06_data *dmard06 = iio_priv(indio_dev);
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(dmard06->client, DMARD06_CTRL1_REG,
+					DMARD06_MODE_POWERDOWN);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int dmard06_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct dmard06_data *dmard06 = iio_priv(indio_dev);
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(dmard06->client, DMARD06_CTRL1_REG,
+					DMARD06_MODE_NORMAL);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(dmard06_pm_ops, dmard06_suspend, dmard06_resume);
+#define DMARD06_PM_OPS (&dmard06_pm_ops)
+#else
+#define DMARD06_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id dmard06_id[] = {
+	{ "dmard05", 0 },
+	{ "dmard06", 0 },
+	{ "dmard07", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, dmard06_id);
+
+static const struct of_device_id dmard06_of_match[] = {
+	{ .compatible = "domintech,dmard05" },
+	{ .compatible = "domintech,dmard06" },
+	{ .compatible = "domintech,dmard07" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, dmard06_of_match);
+
+static struct i2c_driver dmard06_driver = {
+	.probe = dmard06_probe,
+	.id_table = dmard06_id,
+	.driver = {
+		.name = DMARD06_DRV_NAME,
+		.of_match_table = dmard06_of_match,
+		.pm = DMARD06_PM_OPS,
+	},
+};
+module_i2c_driver(dmard06_driver);
+
+MODULE_AUTHOR("Aleksei Mamlin <mamlinav@gmail.com>");
+MODULE_DESCRIPTION("Domintech DMARD06 accelerometer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/dmard09.c b/drivers/iio/accel/dmard09.c
new file mode 100644
index 000000000..e6e28c964
--- /dev/null
+++ b/drivers/iio/accel/dmard09.c
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * IIO driver for the 3-axis accelerometer Domintech DMARD09.
+ *
+ * Copyright (c) 2016, Jelle van der Waa <jelle@vdwaa.nl>
+ */
+
+#include <asm/unaligned.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+
+#define DMARD09_DRV_NAME	"dmard09"
+
+#define DMARD09_REG_CHIPID      0x18
+#define DMARD09_REG_STAT	0x0A
+#define DMARD09_REG_X		0x0C
+#define DMARD09_REG_Y		0x0E
+#define DMARD09_REG_Z		0x10
+#define DMARD09_CHIPID		0x95
+
+#define DMARD09_BUF_LEN 8
+#define DMARD09_AXIS_X 0
+#define DMARD09_AXIS_Y 1
+#define DMARD09_AXIS_Z 2
+#define DMARD09_AXIS_X_OFFSET ((DMARD09_AXIS_X + 1) * 2)
+#define DMARD09_AXIS_Y_OFFSET ((DMARD09_AXIS_Y + 1 )* 2)
+#define DMARD09_AXIS_Z_OFFSET ((DMARD09_AXIS_Z + 1) * 2)
+
+struct dmard09_data {
+	struct i2c_client *client;
+};
+
+#define DMARD09_CHANNEL(_axis, offset) {			\
+	.type = IIO_ACCEL,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+	.modified = 1,						\
+	.address = offset,					\
+	.channel2 = IIO_MOD_##_axis,				\
+}
+
+static const struct iio_chan_spec dmard09_channels[] = {
+	DMARD09_CHANNEL(X, DMARD09_AXIS_X_OFFSET),
+	DMARD09_CHANNEL(Y, DMARD09_AXIS_Y_OFFSET),
+	DMARD09_CHANNEL(Z, DMARD09_AXIS_Z_OFFSET),
+};
+
+static int dmard09_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct dmard09_data *data = iio_priv(indio_dev);
+	u8 buf[DMARD09_BUF_LEN];
+	int ret;
+	s16 accel;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		/*
+		 * Read from the DMAR09_REG_STAT register, since the chip
+		 * caches reads from the individual X, Y, Z registers.
+		 */
+		ret = i2c_smbus_read_i2c_block_data(data->client,
+						    DMARD09_REG_STAT,
+						    DMARD09_BUF_LEN, buf);
+		if (ret < 0) {
+			dev_err(&data->client->dev, "Error reading reg %d\n",
+				DMARD09_REG_STAT);
+			return ret;
+		}
+
+		accel = get_unaligned_le16(&buf[chan->address]);
+
+		/* Remove lower 3 bits and sign extend */
+		accel <<= 4;
+		accel >>= 7;
+
+		*val = accel;
+
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info dmard09_info = {
+	.read_raw	= dmard09_read_raw,
+};
+
+static int dmard09_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct dmard09_data *data;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev) {
+		dev_err(&client->dev, "iio allocation failed\n");
+		return -ENOMEM;
+	}
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+
+	ret = i2c_smbus_read_byte_data(data->client, DMARD09_REG_CHIPID);
+	if (ret < 0) {
+		dev_err(&client->dev, "Error reading chip id %d\n", ret);
+		return ret;
+	}
+
+	if (ret != DMARD09_CHIPID) {
+		dev_err(&client->dev, "Invalid chip id %d\n", ret);
+		return -ENODEV;
+	}
+
+	i2c_set_clientdata(client, indio_dev);
+	indio_dev->name = DMARD09_DRV_NAME;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = dmard09_channels;
+	indio_dev->num_channels = ARRAY_SIZE(dmard09_channels);
+	indio_dev->info = &dmard09_info;
+
+	return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static const struct i2c_device_id dmard09_id[] = {
+	{ "dmard09", 0},
+	{ },
+};
+
+MODULE_DEVICE_TABLE(i2c, dmard09_id);
+
+static struct i2c_driver dmard09_driver = {
+	.driver = {
+		.name = DMARD09_DRV_NAME
+	},
+	.probe = dmard09_probe,
+	.id_table = dmard09_id,
+};
+
+module_i2c_driver(dmard09_driver);
+
+MODULE_AUTHOR("Jelle van der Waa <jelle@vdwaa.nl>");
+MODULE_DESCRIPTION("DMARD09 3-axis accelerometer driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/dmard10.c b/drivers/iio/accel/dmard10.c
new file mode 100644
index 000000000..90206f015
--- /dev/null
+++ b/drivers/iio/accel/dmard10.c
@@ -0,0 +1,261 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**
+ * IIO driver for the 3-axis accelerometer Domintech ARD10.
+ *
+ * Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com>
+ * Copyright (c) 2012 Domintech Technology Co., Ltd
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/byteorder/generic.h>
+
+#define DMARD10_REG_ACTR			0x00
+#define DMARD10_REG_AFEM			0x0c
+#define DMARD10_REG_STADR			0x12
+#define DMARD10_REG_STAINT			0x1c
+#define DMARD10_REG_MISC2			0x1f
+#define DMARD10_REG_PD				0x21
+
+#define DMARD10_MODE_OFF			0x00
+#define DMARD10_MODE_STANDBY			0x02
+#define DMARD10_MODE_ACTIVE			0x06
+#define DMARD10_MODE_READ_OTP			0x12
+#define DMARD10_MODE_RESET_DATA_PATH		0x82
+
+/* AFEN set 1, ATM[2:0]=b'000 (normal), EN_Z/Y/X/T=1 */
+#define DMARD10_VALUE_AFEM_AFEN_NORMAL		0x8f
+/* ODR[3:0]=b'0111 (100Hz), CCK[3:0]=b'0100 (204.8kHZ) */
+#define DMARD10_VALUE_CKSEL_ODR_100_204		0x74
+/* INTC[6:5]=b'00 */
+#define DMARD10_VALUE_INTC			0x00
+/* TAP1/TAP2 Average 2 */
+#define DMARD10_VALUE_TAPNS_AVE_2		0x11
+
+#define DMARD10_VALUE_STADR			0x55
+#define DMARD10_VALUE_STAINT			0xaa
+#define DMARD10_VALUE_MISC2_OSCA_EN		0x08
+#define DMARD10_VALUE_PD_RST			0x52
+
+/* Offsets into the buffer read in dmard10_read_raw() */
+#define DMARD10_X_OFFSET			1
+#define DMARD10_Y_OFFSET			2
+#define DMARD10_Z_OFFSET			3
+
+/*
+ * a value of + or -128 corresponds to + or - 1G
+ * scale = 9.81 / 128 = 0.076640625
+ */
+
+static const int dmard10_nscale = 76640625;
+
+#define DMARD10_CHANNEL(reg, axis) {	\
+	.type = IIO_ACCEL,	\
+	.address = reg,	\
+	.modified = 1,	\
+	.channel2 = IIO_MOD_##axis,	\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+}
+
+static const struct iio_chan_spec dmard10_channels[] = {
+	DMARD10_CHANNEL(DMARD10_X_OFFSET, X),
+	DMARD10_CHANNEL(DMARD10_Y_OFFSET, Y),
+	DMARD10_CHANNEL(DMARD10_Z_OFFSET, Z),
+};
+
+struct dmard10_data {
+	struct i2c_client *client;
+};
+
+/* Init sequence taken from the android driver */
+static int dmard10_reset(struct i2c_client *client)
+{
+	unsigned char buffer[7];
+	int ret;
+
+	/* 1. Powerdown reset */
+	ret = i2c_smbus_write_byte_data(client, DMARD10_REG_PD,
+						DMARD10_VALUE_PD_RST);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * 2. ACTR => Standby mode => Download OTP to parameter reg =>
+	 *    Standby mode => Reset data path => Standby mode
+	 */
+	buffer[0] = DMARD10_REG_ACTR;
+	buffer[1] = DMARD10_MODE_STANDBY;
+	buffer[2] = DMARD10_MODE_READ_OTP;
+	buffer[3] = DMARD10_MODE_STANDBY;
+	buffer[4] = DMARD10_MODE_RESET_DATA_PATH;
+	buffer[5] = DMARD10_MODE_STANDBY;
+	ret = i2c_master_send(client, buffer, 6);
+	if (ret < 0)
+		return ret;
+
+	/* 3. OSCA_EN = 1, TSTO = b'000 (INT1 = normal, TEST0 = normal) */
+	ret = i2c_smbus_write_byte_data(client, DMARD10_REG_MISC2,
+						DMARD10_VALUE_MISC2_OSCA_EN);
+	if (ret < 0)
+		return ret;
+
+	/* 4. AFEN = 1 (AFE will powerdown after ADC) */
+	buffer[0] = DMARD10_REG_AFEM;
+	buffer[1] = DMARD10_VALUE_AFEM_AFEN_NORMAL;
+	buffer[2] = DMARD10_VALUE_CKSEL_ODR_100_204;
+	buffer[3] = DMARD10_VALUE_INTC;
+	buffer[4] = DMARD10_VALUE_TAPNS_AVE_2;
+	buffer[5] = 0x00; /* DLYC, no delay timing */
+	buffer[6] = 0x07; /* INTD=1 push-pull, INTA=1 active high, AUTOT=1 */
+	ret = i2c_master_send(client, buffer, 7);
+	if (ret < 0)
+		return ret;
+
+	/* 5. Activation mode */
+	ret = i2c_smbus_write_byte_data(client, DMARD10_REG_ACTR,
+						DMARD10_MODE_ACTIVE);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+/* Shutdown sequence taken from the android driver */
+static int dmard10_shutdown(struct i2c_client *client)
+{
+	unsigned char buffer[3];
+
+	buffer[0] = DMARD10_REG_ACTR;
+	buffer[1] = DMARD10_MODE_STANDBY;
+	buffer[2] = DMARD10_MODE_OFF;
+
+	return i2c_master_send(client, buffer, 3);
+}
+
+static int dmard10_read_raw(struct iio_dev *indio_dev,
+				struct iio_chan_spec const *chan,
+				int *val, int *val2, long mask)
+{
+	struct dmard10_data *data = iio_priv(indio_dev);
+	__le16 buf[4];
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		/*
+		 * Read 8 bytes starting at the REG_STADR register, trying to
+		 * read the individual X, Y, Z registers will always read 0.
+		 */
+		ret = i2c_smbus_read_i2c_block_data(data->client,
+						    DMARD10_REG_STADR,
+						    sizeof(buf), (u8 *)buf);
+		if (ret < 0)
+			return ret;
+		ret = le16_to_cpu(buf[chan->address]);
+		*val = sign_extend32(ret, 12);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = dmard10_nscale;
+		return IIO_VAL_INT_PLUS_NANO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info dmard10_info = {
+	.read_raw	= dmard10_read_raw,
+};
+
+static int dmard10_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct dmard10_data *data;
+
+	/* These 2 registers have special POR reset values used for id */
+	ret = i2c_smbus_read_byte_data(client, DMARD10_REG_STADR);
+	if (ret != DMARD10_VALUE_STADR)
+		return (ret < 0) ? ret : -ENODEV;
+
+	ret = i2c_smbus_read_byte_data(client, DMARD10_REG_STAINT);
+	if (ret != DMARD10_VALUE_STAINT)
+		return (ret < 0) ? ret : -ENODEV;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev) {
+		dev_err(&client->dev, "iio allocation failed!\n");
+		return -ENOMEM;
+	}
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	i2c_set_clientdata(client, indio_dev);
+
+	indio_dev->info = &dmard10_info;
+	indio_dev->name = "dmard10";
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = dmard10_channels;
+	indio_dev->num_channels = ARRAY_SIZE(dmard10_channels);
+
+	ret = dmard10_reset(client);
+	if (ret < 0)
+		return ret;
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "device_register failed\n");
+		dmard10_shutdown(client);
+	}
+
+	return ret;
+}
+
+static int dmard10_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+	iio_device_unregister(indio_dev);
+
+	return dmard10_shutdown(client);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int dmard10_suspend(struct device *dev)
+{
+	return dmard10_shutdown(to_i2c_client(dev));
+}
+
+static int dmard10_resume(struct device *dev)
+{
+	return dmard10_reset(to_i2c_client(dev));
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(dmard10_pm_ops, dmard10_suspend, dmard10_resume);
+
+static const struct i2c_device_id dmard10_i2c_id[] = {
+	{"dmard10", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, dmard10_i2c_id);
+
+static struct i2c_driver dmard10_driver = {
+	.driver = {
+		.name = "dmard10",
+		.pm = &dmard10_pm_ops,
+	},
+	.probe		= dmard10_probe,
+	.remove		= dmard10_remove,
+	.id_table	= dmard10_i2c_id,
+};
+
+module_i2c_driver(dmard10_driver);
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("Domintech ARD10 3-Axis Accelerometer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/hid-sensor-accel-3d.c b/drivers/iio/accel/hid-sensor-accel-3d.c
new file mode 100644
index 000000000..8d929a4f9
--- /dev/null
+++ b/drivers/iio/accel/hid-sensor-accel-3d.c
@@ -0,0 +1,471 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2012, Intel Corporation.
+ */
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/hid-sensor-hub.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include "../common/hid-sensors/hid-sensor-trigger.h"
+
+enum accel_3d_channel {
+	CHANNEL_SCAN_INDEX_X,
+	CHANNEL_SCAN_INDEX_Y,
+	CHANNEL_SCAN_INDEX_Z,
+	ACCEL_3D_CHANNEL_MAX,
+};
+
+struct accel_3d_state {
+	struct hid_sensor_hub_callbacks callbacks;
+	struct hid_sensor_common common_attributes;
+	struct hid_sensor_hub_attribute_info accel[ACCEL_3D_CHANNEL_MAX];
+	/* Ensure timestamp is naturally aligned */
+	struct {
+		u32 accel_val[3];
+		s64 timestamp __aligned(8);
+	} scan;
+	int scale_pre_decml;
+	int scale_post_decml;
+	int scale_precision;
+	int value_offset;
+	int64_t timestamp;
+};
+
+static const u32 accel_3d_addresses[ACCEL_3D_CHANNEL_MAX] = {
+	HID_USAGE_SENSOR_ACCEL_X_AXIS,
+	HID_USAGE_SENSOR_ACCEL_Y_AXIS,
+	HID_USAGE_SENSOR_ACCEL_Z_AXIS
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec accel_3d_channels[] = {
+	{
+		.type = IIO_ACCEL,
+		.modified = 1,
+		.channel2 = IIO_MOD_X,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_X,
+	}, {
+		.type = IIO_ACCEL,
+		.modified = 1,
+		.channel2 = IIO_MOD_Y,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_Y,
+	}, {
+		.type = IIO_ACCEL,
+		.modified = 1,
+		.channel2 = IIO_MOD_Z,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_Z,
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(3)
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec gravity_channels[] = {
+	{
+		.type = IIO_GRAVITY,
+		.modified = 1,
+		.channel2 = IIO_MOD_X,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_X,
+	}, {
+		.type = IIO_GRAVITY,
+		.modified = 1,
+		.channel2 = IIO_MOD_Y,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_Y,
+	}, {
+		.type = IIO_GRAVITY,
+		.modified = 1,
+		.channel2 = IIO_MOD_Z,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_Z,
+	}
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void accel_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
+						int channel, int size)
+{
+	channels[channel].scan_type.sign = 's';
+	/* Real storage bits will change based on the report desc. */
+	channels[channel].scan_type.realbits = size * 8;
+	/* Maximum size of a sample to capture is u32 */
+	channels[channel].scan_type.storagebits = sizeof(u32) * 8;
+}
+
+/* Channel read_raw handler */
+static int accel_3d_read_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,
+			      int *val, int *val2,
+			      long mask)
+{
+	struct accel_3d_state *accel_state = iio_priv(indio_dev);
+	int report_id = -1;
+	u32 address;
+	int ret_type;
+	s32 min;
+	struct hid_sensor_hub_device *hsdev =
+					accel_state->common_attributes.hsdev;
+
+	*val = 0;
+	*val2 = 0;
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		hid_sensor_power_state(&accel_state->common_attributes, true);
+		report_id = accel_state->accel[chan->scan_index].report_id;
+		min = accel_state->accel[chan->scan_index].logical_minimum;
+		address = accel_3d_addresses[chan->scan_index];
+		if (report_id >= 0)
+			*val = sensor_hub_input_attr_get_raw_value(
+					accel_state->common_attributes.hsdev,
+					hsdev->usage, address, report_id,
+					SENSOR_HUB_SYNC,
+					min < 0);
+		else {
+			*val = 0;
+			hid_sensor_power_state(&accel_state->common_attributes,
+						 false);
+			return -EINVAL;
+		}
+		hid_sensor_power_state(&accel_state->common_attributes, false);
+		ret_type = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_SCALE:
+		*val = accel_state->scale_pre_decml;
+		*val2 = accel_state->scale_post_decml;
+		ret_type = accel_state->scale_precision;
+		break;
+	case IIO_CHAN_INFO_OFFSET:
+		*val = accel_state->value_offset;
+		ret_type = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		ret_type = hid_sensor_read_samp_freq_value(
+			&accel_state->common_attributes, val, val2);
+		break;
+	case IIO_CHAN_INFO_HYSTERESIS:
+		ret_type = hid_sensor_read_raw_hyst_value(
+			&accel_state->common_attributes, val, val2);
+		break;
+	default:
+		ret_type = -EINVAL;
+		break;
+	}
+
+	return ret_type;
+}
+
+/* Channel write_raw handler */
+static int accel_3d_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val,
+			       int val2,
+			       long mask)
+{
+	struct accel_3d_state *accel_state = iio_priv(indio_dev);
+	int ret = 0;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		ret = hid_sensor_write_samp_freq_value(
+				&accel_state->common_attributes, val, val2);
+		break;
+	case IIO_CHAN_INFO_HYSTERESIS:
+		ret = hid_sensor_write_raw_hyst_value(
+				&accel_state->common_attributes, val, val2);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static const struct iio_info accel_3d_info = {
+	.read_raw = &accel_3d_read_raw,
+	.write_raw = &accel_3d_write_raw,
+};
+
+/* Function to push data to buffer */
+static void hid_sensor_push_data(struct iio_dev *indio_dev, void *data,
+				 int len, int64_t timestamp)
+{
+	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
+	iio_push_to_buffers_with_timestamp(indio_dev, data, timestamp);
+}
+
+/* Callback handler to send event after all samples are received and captured */
+static int accel_3d_proc_event(struct hid_sensor_hub_device *hsdev,
+				unsigned usage_id,
+				void *priv)
+{
+	struct iio_dev *indio_dev = platform_get_drvdata(priv);
+	struct accel_3d_state *accel_state = iio_priv(indio_dev);
+
+	dev_dbg(&indio_dev->dev, "accel_3d_proc_event\n");
+	if (atomic_read(&accel_state->common_attributes.data_ready)) {
+		if (!accel_state->timestamp)
+			accel_state->timestamp = iio_get_time_ns(indio_dev);
+
+		hid_sensor_push_data(indio_dev,
+				     &accel_state->scan,
+				     sizeof(accel_state->scan),
+				     accel_state->timestamp);
+
+		accel_state->timestamp = 0;
+	}
+
+	return 0;
+}
+
+/* Capture samples in local storage */
+static int accel_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
+				unsigned usage_id,
+				size_t raw_len, char *raw_data,
+				void *priv)
+{
+	struct iio_dev *indio_dev = platform_get_drvdata(priv);
+	struct accel_3d_state *accel_state = iio_priv(indio_dev);
+	int offset;
+	int ret = -EINVAL;
+
+	switch (usage_id) {
+	case HID_USAGE_SENSOR_ACCEL_X_AXIS:
+	case HID_USAGE_SENSOR_ACCEL_Y_AXIS:
+	case HID_USAGE_SENSOR_ACCEL_Z_AXIS:
+		offset = usage_id - HID_USAGE_SENSOR_ACCEL_X_AXIS;
+		accel_state->scan.accel_val[CHANNEL_SCAN_INDEX_X + offset] =
+						*(u32 *)raw_data;
+		ret = 0;
+	break;
+	case HID_USAGE_SENSOR_TIME_TIMESTAMP:
+		accel_state->timestamp =
+			hid_sensor_convert_timestamp(
+					&accel_state->common_attributes,
+					*(int64_t *)raw_data);
+		ret = 0;
+	break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+/* Parse report which is specific to an usage id*/
+static int accel_3d_parse_report(struct platform_device *pdev,
+				struct hid_sensor_hub_device *hsdev,
+				struct iio_chan_spec *channels,
+				unsigned usage_id,
+				struct accel_3d_state *st)
+{
+	int ret;
+	int i;
+
+	for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
+		ret = sensor_hub_input_get_attribute_info(hsdev,
+				HID_INPUT_REPORT,
+				usage_id,
+				HID_USAGE_SENSOR_ACCEL_X_AXIS + i,
+				&st->accel[CHANNEL_SCAN_INDEX_X + i]);
+		if (ret < 0)
+			break;
+		accel_3d_adjust_channel_bit_mask(channels,
+				CHANNEL_SCAN_INDEX_X + i,
+				st->accel[CHANNEL_SCAN_INDEX_X + i].size);
+	}
+	dev_dbg(&pdev->dev, "accel_3d %x:%x, %x:%x, %x:%x\n",
+			st->accel[0].index,
+			st->accel[0].report_id,
+			st->accel[1].index, st->accel[1].report_id,
+			st->accel[2].index, st->accel[2].report_id);
+
+	st->scale_precision = hid_sensor_format_scale(
+				hsdev->usage,
+				&st->accel[CHANNEL_SCAN_INDEX_X],
+				&st->scale_pre_decml, &st->scale_post_decml);
+
+	/* Set Sensitivity field ids, when there is no individual modifier */
+	if (st->common_attributes.sensitivity.index < 0) {
+		sensor_hub_input_get_attribute_info(hsdev,
+			HID_FEATURE_REPORT, usage_id,
+			HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
+			HID_USAGE_SENSOR_DATA_ACCELERATION,
+			&st->common_attributes.sensitivity);
+		dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
+			st->common_attributes.sensitivity.index,
+			st->common_attributes.sensitivity.report_id);
+	}
+
+	return ret;
+}
+
+/* Function to initialize the processing for usage id */
+static int hid_accel_3d_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+	const char *name;
+	struct iio_dev *indio_dev;
+	struct accel_3d_state *accel_state;
+	const struct iio_chan_spec *channel_spec;
+	int channel_size;
+
+	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+
+	indio_dev = devm_iio_device_alloc(&pdev->dev,
+					  sizeof(struct accel_3d_state));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, indio_dev);
+
+	accel_state = iio_priv(indio_dev);
+	accel_state->common_attributes.hsdev = hsdev;
+	accel_state->common_attributes.pdev = pdev;
+
+	if (hsdev->usage == HID_USAGE_SENSOR_ACCEL_3D) {
+		name = "accel_3d";
+		channel_spec = accel_3d_channels;
+		channel_size = sizeof(accel_3d_channels);
+		indio_dev->num_channels = ARRAY_SIZE(accel_3d_channels);
+	} else {
+		name = "gravity";
+		channel_spec = gravity_channels;
+		channel_size = sizeof(gravity_channels);
+		indio_dev->num_channels = ARRAY_SIZE(gravity_channels);
+	}
+	ret = hid_sensor_parse_common_attributes(hsdev, hsdev->usage,
+					&accel_state->common_attributes);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to setup common attributes\n");
+		return ret;
+	}
+	indio_dev->channels = kmemdup(channel_spec, channel_size, GFP_KERNEL);
+
+	if (!indio_dev->channels) {
+		dev_err(&pdev->dev, "failed to duplicate channels\n");
+		return -ENOMEM;
+	}
+	ret = accel_3d_parse_report(pdev, hsdev,
+				(struct iio_chan_spec *)indio_dev->channels,
+				hsdev->usage, accel_state);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to setup attributes\n");
+		goto error_free_dev_mem;
+	}
+
+	indio_dev->info = &accel_3d_info;
+	indio_dev->name = name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	atomic_set(&accel_state->common_attributes.data_ready, 0);
+
+	ret = hid_sensor_setup_trigger(indio_dev, name,
+					&accel_state->common_attributes);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "trigger setup failed\n");
+		goto error_free_dev_mem;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		dev_err(&pdev->dev, "device register failed\n");
+		goto error_remove_trigger;
+	}
+
+	accel_state->callbacks.send_event = accel_3d_proc_event;
+	accel_state->callbacks.capture_sample = accel_3d_capture_sample;
+	accel_state->callbacks.pdev = pdev;
+	ret = sensor_hub_register_callback(hsdev, hsdev->usage,
+					&accel_state->callbacks);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "callback reg failed\n");
+		goto error_iio_unreg;
+	}
+
+	return ret;
+
+error_iio_unreg:
+	iio_device_unregister(indio_dev);
+error_remove_trigger:
+	hid_sensor_remove_trigger(indio_dev, &accel_state->common_attributes);
+error_free_dev_mem:
+	kfree(indio_dev->channels);
+	return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_accel_3d_remove(struct platform_device *pdev)
+{
+	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+	struct accel_3d_state *accel_state = iio_priv(indio_dev);
+
+	sensor_hub_remove_callback(hsdev, hsdev->usage);
+	iio_device_unregister(indio_dev);
+	hid_sensor_remove_trigger(indio_dev, &accel_state->common_attributes);
+	kfree(indio_dev->channels);
+
+	return 0;
+}
+
+static const struct platform_device_id hid_accel_3d_ids[] = {
+	{
+		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+		.name = "HID-SENSOR-200073",
+	},
+	{	/* gravity sensor */
+		.name = "HID-SENSOR-20007b",
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_accel_3d_ids);
+
+static struct platform_driver hid_accel_3d_platform_driver = {
+	.id_table = hid_accel_3d_ids,
+	.driver = {
+		.name	= KBUILD_MODNAME,
+		.pm	= &hid_sensor_pm_ops,
+	},
+	.probe		= hid_accel_3d_probe,
+	.remove		= hid_accel_3d_remove,
+};
+module_platform_driver(hid_accel_3d_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor Accel 3D");
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
new file mode 100644
index 000000000..89e0a89d9
--- /dev/null
+++ b/drivers/iio/accel/kxcjk-1013.c
@@ -0,0 +1,1600 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * KXCJK-1013 3-axis accelerometer driver
+ * Copyright (c) 2014, Intel Corporation.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/acpi.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/events.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/accel/kxcjk_1013.h>
+
+#define KXCJK1013_DRV_NAME "kxcjk1013"
+#define KXCJK1013_IRQ_NAME "kxcjk1013_event"
+
+#define KXTF9_REG_HP_XOUT_L		0x00
+#define KXTF9_REG_HP_XOUT_H		0x01
+#define KXTF9_REG_HP_YOUT_L		0x02
+#define KXTF9_REG_HP_YOUT_H		0x03
+#define KXTF9_REG_HP_ZOUT_L		0x04
+#define KXTF9_REG_HP_ZOUT_H		0x05
+
+#define KXCJK1013_REG_XOUT_L		0x06
+/*
+ * From low byte X axis register, all the other addresses of Y and Z can be
+ * obtained by just applying axis offset. The following axis defines are just
+ * provide clarity, but not used.
+ */
+#define KXCJK1013_REG_XOUT_H		0x07
+#define KXCJK1013_REG_YOUT_L		0x08
+#define KXCJK1013_REG_YOUT_H		0x09
+#define KXCJK1013_REG_ZOUT_L		0x0A
+#define KXCJK1013_REG_ZOUT_H		0x0B
+
+#define KXCJK1013_REG_DCST_RESP		0x0C
+#define KXCJK1013_REG_WHO_AM_I		0x0F
+#define KXTF9_REG_TILT_POS_CUR		0x10
+#define KXTF9_REG_TILT_POS_PREV		0x11
+#define KXTF9_REG_INT_SRC1		0x15
+#define KXCJK1013_REG_INT_SRC1		0x16	/* compatible, but called INT_SRC2 in KXTF9 ds */
+#define KXCJK1013_REG_INT_SRC2		0x17
+#define KXCJK1013_REG_STATUS_REG	0x18
+#define KXCJK1013_REG_INT_REL		0x1A
+#define KXCJK1013_REG_CTRL1		0x1B
+#define KXTF9_REG_CTRL2			0x1C
+#define KXCJK1013_REG_CTRL2		0x1D	/* mostly compatible, CTRL_REG3 in KTXF9 ds */
+#define KXCJK1013_REG_INT_CTRL1		0x1E
+#define KXCJK1013_REG_INT_CTRL2		0x1F
+#define KXTF9_REG_INT_CTRL3		0x20
+#define KXCJK1013_REG_DATA_CTRL		0x21
+#define KXTF9_REG_TILT_TIMER		0x28
+#define KXCJK1013_REG_WAKE_TIMER	0x29
+#define KXTF9_REG_TDT_TIMER		0x2B
+#define KXTF9_REG_TDT_THRESH_H		0x2C
+#define KXTF9_REG_TDT_THRESH_L		0x2D
+#define KXTF9_REG_TDT_TAP_TIMER		0x2E
+#define KXTF9_REG_TDT_TOTAL_TIMER	0x2F
+#define KXTF9_REG_TDT_LATENCY_TIMER	0x30
+#define KXTF9_REG_TDT_WINDOW_TIMER	0x31
+#define KXCJK1013_REG_SELF_TEST		0x3A
+#define KXTF9_REG_WAKE_THRESH		0x5A
+#define KXTF9_REG_TILT_ANGLE		0x5C
+#define KXTF9_REG_HYST_SET		0x5F
+#define KXCJK1013_REG_WAKE_THRES	0x6A
+
+#define KXCJK1013_REG_CTRL1_BIT_PC1	BIT(7)
+#define KXCJK1013_REG_CTRL1_BIT_RES	BIT(6)
+#define KXCJK1013_REG_CTRL1_BIT_DRDY	BIT(5)
+#define KXCJK1013_REG_CTRL1_BIT_GSEL1	BIT(4)
+#define KXCJK1013_REG_CTRL1_BIT_GSEL0	BIT(3)
+#define KXCJK1013_REG_CTRL1_BIT_WUFE	BIT(1)
+
+#define KXCJK1013_REG_INT_CTRL1_BIT_IEU	BIT(2)	/* KXTF9 */
+#define KXCJK1013_REG_INT_CTRL1_BIT_IEL	BIT(3)
+#define KXCJK1013_REG_INT_CTRL1_BIT_IEA	BIT(4)
+#define KXCJK1013_REG_INT_CTRL1_BIT_IEN	BIT(5)
+
+#define KXTF9_REG_TILT_BIT_LEFT_EDGE	BIT(5)
+#define KXTF9_REG_TILT_BIT_RIGHT_EDGE	BIT(4)
+#define KXTF9_REG_TILT_BIT_LOWER_EDGE	BIT(3)
+#define KXTF9_REG_TILT_BIT_UPPER_EDGE	BIT(2)
+#define KXTF9_REG_TILT_BIT_FACE_DOWN	BIT(1)
+#define KXTF9_REG_TILT_BIT_FACE_UP	BIT(0)
+
+#define KXCJK1013_DATA_MASK_12_BIT	0x0FFF
+#define KXCJK1013_MAX_STARTUP_TIME_US	100000
+
+#define KXCJK1013_SLEEP_DELAY_MS	2000
+
+#define KXCJK1013_REG_INT_SRC1_BIT_TPS	BIT(0)	/* KXTF9 */
+#define KXCJK1013_REG_INT_SRC1_BIT_WUFS	BIT(1)
+#define KXCJK1013_REG_INT_SRC1_MASK_TDTS	(BIT(2) | BIT(3))	/* KXTF9 */
+#define KXCJK1013_REG_INT_SRC1_TAP_NONE		0
+#define KXCJK1013_REG_INT_SRC1_TAP_SINGLE		BIT(2)
+#define KXCJK1013_REG_INT_SRC1_TAP_DOUBLE		BIT(3)
+#define KXCJK1013_REG_INT_SRC1_BIT_DRDY	BIT(4)
+
+/* KXCJK: INT_SOURCE2: motion detect, KXTF9: INT_SRC_REG1: tap detect */
+#define KXCJK1013_REG_INT_SRC2_BIT_ZP	BIT(0)
+#define KXCJK1013_REG_INT_SRC2_BIT_ZN	BIT(1)
+#define KXCJK1013_REG_INT_SRC2_BIT_YP	BIT(2)
+#define KXCJK1013_REG_INT_SRC2_BIT_YN	BIT(3)
+#define KXCJK1013_REG_INT_SRC2_BIT_XP	BIT(4)
+#define KXCJK1013_REG_INT_SRC2_BIT_XN	BIT(5)
+
+#define KXCJK1013_DEFAULT_WAKE_THRES	1
+
+enum kx_chipset {
+	KXCJK1013,
+	KXCJ91008,
+	KXTJ21009,
+	KXTF9,
+	KX_MAX_CHIPS /* this must be last */
+};
+
+enum kx_acpi_type {
+	ACPI_GENERIC,
+	ACPI_SMO8500,
+	ACPI_KIOX010A,
+};
+
+enum kxcjk1013_axis {
+	AXIS_X,
+	AXIS_Y,
+	AXIS_Z,
+	AXIS_MAX
+};
+
+struct kxcjk1013_data {
+	struct i2c_client *client;
+	struct iio_trigger *dready_trig;
+	struct iio_trigger *motion_trig;
+	struct iio_mount_matrix orientation;
+	struct mutex mutex;
+	/* Ensure timestamp naturally aligned */
+	struct {
+		s16 chans[AXIS_MAX];
+		s64 timestamp __aligned(8);
+	} scan;
+	u8 odr_bits;
+	u8 range;
+	int wake_thres;
+	int wake_dur;
+	bool active_high_intr;
+	bool dready_trigger_on;
+	int ev_enable_state;
+	bool motion_trigger_on;
+	int64_t timestamp;
+	enum kx_chipset chipset;
+	enum kx_acpi_type acpi_type;
+};
+
+enum kxcjk1013_mode {
+	STANDBY,
+	OPERATION,
+};
+
+enum kxcjk1013_range {
+	KXCJK1013_RANGE_2G,
+	KXCJK1013_RANGE_4G,
+	KXCJK1013_RANGE_8G,
+};
+
+struct kx_odr_map {
+	int val;
+	int val2;
+	int odr_bits;
+	int wuf_bits;
+};
+
+static const struct kx_odr_map samp_freq_table[] = {
+	{ 0, 781000, 0x08, 0x00 },
+	{ 1, 563000, 0x09, 0x01 },
+	{ 3, 125000, 0x0A, 0x02 },
+	{ 6, 250000, 0x0B, 0x03 },
+	{ 12, 500000, 0x00, 0x04 },
+	{ 25, 0, 0x01, 0x05 },
+	{ 50, 0, 0x02, 0x06 },
+	{ 100, 0, 0x03, 0x06 },
+	{ 200, 0, 0x04, 0x06 },
+	{ 400, 0, 0x05, 0x06 },
+	{ 800, 0, 0x06, 0x06 },
+	{ 1600, 0, 0x07, 0x06 },
+};
+
+static const char *const kxcjk1013_samp_freq_avail =
+	"0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600";
+
+static const struct kx_odr_map kxtf9_samp_freq_table[] = {
+	{ 25, 0, 0x01, 0x00 },
+	{ 50, 0, 0x02, 0x01 },
+	{ 100, 0, 0x03, 0x01 },
+	{ 200, 0, 0x04, 0x01 },
+	{ 400, 0, 0x05, 0x01 },
+	{ 800, 0, 0x06, 0x01 },
+};
+
+static const char *const kxtf9_samp_freq_avail =
+	"25 50 100 200 400 800";
+
+/* Refer to section 4 of the specification */
+static const struct {
+	int odr_bits;
+	int usec;
+} odr_start_up_times[KX_MAX_CHIPS][12] = {
+	/* KXCJK-1013 */
+	{
+		{0x08, 100000},
+		{0x09, 100000},
+		{0x0A, 100000},
+		{0x0B, 100000},
+		{0, 80000},
+		{0x01, 41000},
+		{0x02, 21000},
+		{0x03, 11000},
+		{0x04, 6400},
+		{0x05, 3900},
+		{0x06, 2700},
+		{0x07, 2100},
+	},
+	/* KXCJ9-1008 */
+	{
+		{0x08, 100000},
+		{0x09, 100000},
+		{0x0A, 100000},
+		{0x0B, 100000},
+		{0, 80000},
+		{0x01, 41000},
+		{0x02, 21000},
+		{0x03, 11000},
+		{0x04, 6400},
+		{0x05, 3900},
+		{0x06, 2700},
+		{0x07, 2100},
+	},
+	/* KXCTJ2-1009 */
+	{
+		{0x08, 1240000},
+		{0x09, 621000},
+		{0x0A, 309000},
+		{0x0B, 151000},
+		{0, 80000},
+		{0x01, 41000},
+		{0x02, 21000},
+		{0x03, 11000},
+		{0x04, 6000},
+		{0x05, 4000},
+		{0x06, 3000},
+		{0x07, 2000},
+	},
+	/* KXTF9 */
+	{
+		{0x01, 81000},
+		{0x02, 41000},
+		{0x03, 21000},
+		{0x04, 11000},
+		{0x05, 5100},
+		{0x06, 2700},
+	},
+};
+
+static const struct {
+	u16 scale;
+	u8 gsel_0;
+	u8 gsel_1;
+} KXCJK1013_scale_table[] = { {9582, 0, 0},
+			      {19163, 1, 0},
+			      {38326, 0, 1} };
+
+#ifdef CONFIG_ACPI
+enum kiox010a_fn_index {
+	KIOX010A_SET_LAPTOP_MODE = 1,
+	KIOX010A_SET_TABLET_MODE = 2,
+};
+
+static int kiox010a_dsm(struct device *dev, int fn_index)
+{
+	acpi_handle handle = ACPI_HANDLE(dev);
+	guid_t kiox010a_dsm_guid;
+	union acpi_object *obj;
+
+	if (!handle)
+		return -ENODEV;
+
+	guid_parse("1f339696-d475-4e26-8cad-2e9f8e6d7a91", &kiox010a_dsm_guid);
+
+	obj = acpi_evaluate_dsm(handle, &kiox010a_dsm_guid, 1, fn_index, NULL);
+	if (!obj)
+		return -EIO;
+
+	ACPI_FREE(obj);
+	return 0;
+}
+#endif
+
+static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
+			      enum kxcjk1013_mode mode)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	if (mode == STANDBY)
+		ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
+	else
+		ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					KXCJK1013_REG_CTRL1, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
+			      enum kxcjk1013_mode *mode)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
+		*mode = OPERATION;
+	else
+		*mode = STANDBY;
+
+	return 0;
+}
+
+static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
+		 KXCJK1013_REG_CTRL1_BIT_GSEL1);
+	ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
+	ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					KXCJK1013_REG_CTRL1,
+					ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+		return ret;
+	}
+
+	data->range = range_index;
+
+	return 0;
+}
+
+static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
+{
+	int ret;
+
+#ifdef CONFIG_ACPI
+	if (data->acpi_type == ACPI_KIOX010A) {
+		/* Make sure the kbd and touchpad on 2-in-1s using 2 KXCJ91008-s work */
+		kiox010a_dsm(&data->client->dev, KIOX010A_SET_LAPTOP_MODE);
+	}
+#endif
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading who_am_i\n");
+		return ret;
+	}
+
+	dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
+
+	ret = kxcjk1013_set_mode(data, STANDBY);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	/* Set 12 bit mode */
+	ret |= KXCJK1013_REG_CTRL1_BIT_RES;
+
+	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
+					ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl\n");
+		return ret;
+	}
+
+	/* Setting range to 4G */
+	ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
+		return ret;
+	}
+
+	data->odr_bits = ret;
+
+	/* Set up INT polarity */
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
+		return ret;
+	}
+
+	if (data->active_high_intr)
+		ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEA;
+	else
+		ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEA;
+
+	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
+					ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
+		return ret;
+	}
+
+	ret = kxcjk1013_set_mode(data, OPERATION);
+	if (ret < 0)
+		return ret;
+
+	data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
+{
+	int i;
+	int idx = data->chipset;
+
+	for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
+		if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
+			return odr_start_up_times[idx][i].usec;
+	}
+
+	return KXCJK1013_MAX_STARTUP_TIME_US;
+}
+#endif
+
+static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
+{
+#ifdef CONFIG_PM
+	int ret;
+
+	if (on)
+		ret = pm_runtime_get_sync(&data->client->dev);
+	else {
+		pm_runtime_mark_last_busy(&data->client->dev);
+		ret = pm_runtime_put_autosuspend(&data->client->dev);
+	}
+	if (ret < 0) {
+		dev_err(&data->client->dev,
+			"Failed: %s for %d\n", __func__, on);
+		if (on)
+			pm_runtime_put_noidle(&data->client->dev);
+		return ret;
+	}
+#endif
+
+	return 0;
+}
+
+static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
+{
+	int waketh_reg, ret;
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					KXCJK1013_REG_WAKE_TIMER,
+					data->wake_dur);
+	if (ret < 0) {
+		dev_err(&data->client->dev,
+			"Error writing reg_wake_timer\n");
+		return ret;
+	}
+
+	waketh_reg = data->chipset == KXTF9 ?
+		KXTF9_REG_WAKE_THRESH : KXCJK1013_REG_WAKE_THRES;
+	ret = i2c_smbus_write_byte_data(data->client, waketh_reg,
+					data->wake_thres);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
+						bool status)
+{
+	int ret;
+	enum kxcjk1013_mode store_mode;
+
+	ret = kxcjk1013_get_mode(data, &store_mode);
+	if (ret < 0)
+		return ret;
+
+	/* This is requirement by spec to change state to STANDBY */
+	ret = kxcjk1013_set_mode(data, STANDBY);
+	if (ret < 0)
+		return ret;
+
+	ret = kxcjk1013_chip_update_thresholds(data);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
+		return ret;
+	}
+
+	if (status)
+		ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
+	else
+		ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
+
+	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
+					ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
+		return ret;
+	}
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	if (status)
+		ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
+	else
+		ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					KXCJK1013_REG_CTRL1, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+		return ret;
+	}
+
+	if (store_mode == OPERATION) {
+		ret = kxcjk1013_set_mode(data, OPERATION);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
+					      bool status)
+{
+	int ret;
+	enum kxcjk1013_mode store_mode;
+
+	ret = kxcjk1013_get_mode(data, &store_mode);
+	if (ret < 0)
+		return ret;
+
+	/* This is requirement by spec to change state to STANDBY */
+	ret = kxcjk1013_set_mode(data, STANDBY);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
+		return ret;
+	}
+
+	if (status)
+		ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
+	else
+		ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
+
+	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
+					ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
+		return ret;
+	}
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	if (status)
+		ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
+	else
+		ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					KXCJK1013_REG_CTRL1, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+		return ret;
+	}
+
+	if (store_mode == OPERATION) {
+		ret = kxcjk1013_set_mode(data, OPERATION);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const struct kx_odr_map *kxcjk1013_find_odr_value(
+	const struct kx_odr_map *map, size_t map_size, int val, int val2)
+{
+	int i;
+
+	for (i = 0; i < map_size; ++i) {
+		if (map[i].val == val && map[i].val2 == val2)
+			return &map[i];
+	}
+
+	return ERR_PTR(-EINVAL);
+}
+
+static int kxcjk1013_convert_odr_value(const struct kx_odr_map *map,
+				       size_t map_size, int odr_bits,
+				       int *val, int *val2)
+{
+	int i;
+
+	for (i = 0; i < map_size; ++i) {
+		if (map[i].odr_bits == odr_bits) {
+			*val = map[i].val;
+			*val2 = map[i].val2;
+			return IIO_VAL_INT_PLUS_MICRO;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
+{
+	int ret;
+	enum kxcjk1013_mode store_mode;
+	const struct kx_odr_map *odr_setting;
+
+	ret = kxcjk1013_get_mode(data, &store_mode);
+	if (ret < 0)
+		return ret;
+
+	if (data->chipset == KXTF9)
+		odr_setting = kxcjk1013_find_odr_value(kxtf9_samp_freq_table,
+						       ARRAY_SIZE(kxtf9_samp_freq_table),
+						       val, val2);
+	else
+		odr_setting = kxcjk1013_find_odr_value(samp_freq_table,
+						       ARRAY_SIZE(samp_freq_table),
+						       val, val2);
+
+	if (IS_ERR(odr_setting))
+		return PTR_ERR(odr_setting);
+
+	/* To change ODR, the chip must be set to STANDBY as per spec */
+	ret = kxcjk1013_set_mode(data, STANDBY);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
+					odr_setting->odr_bits);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing data_ctrl\n");
+		return ret;
+	}
+
+	data->odr_bits = odr_setting->odr_bits;
+
+	ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2,
+					odr_setting->wuf_bits);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
+		return ret;
+	}
+
+	if (store_mode == OPERATION) {
+		ret = kxcjk1013_set_mode(data, OPERATION);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
+{
+	if (data->chipset == KXTF9)
+		return kxcjk1013_convert_odr_value(kxtf9_samp_freq_table,
+						   ARRAY_SIZE(kxtf9_samp_freq_table),
+						   data->odr_bits, val, val2);
+	else
+		return kxcjk1013_convert_odr_value(samp_freq_table,
+						   ARRAY_SIZE(samp_freq_table),
+						   data->odr_bits, val, val2);
+}
+
+static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
+{
+	u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
+	int ret;
+
+	ret = i2c_smbus_read_word_data(data->client, reg);
+	if (ret < 0) {
+		dev_err(&data->client->dev,
+			"failed to read accel_%c registers\n", 'x' + axis);
+		return ret;
+	}
+
+	return ret;
+}
+
+static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
+{
+	int ret, i;
+	enum kxcjk1013_mode store_mode;
+
+	for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
+		if (KXCJK1013_scale_table[i].scale == val) {
+			ret = kxcjk1013_get_mode(data, &store_mode);
+			if (ret < 0)
+				return ret;
+
+			ret = kxcjk1013_set_mode(data, STANDBY);
+			if (ret < 0)
+				return ret;
+
+			ret = kxcjk1013_set_range(data, i);
+			if (ret < 0)
+				return ret;
+
+			if (store_mode == OPERATION) {
+				ret = kxcjk1013_set_mode(data, OPERATION);
+				if (ret)
+					return ret;
+			}
+
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan, int *val,
+			      int *val2, long mask)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		mutex_lock(&data->mutex);
+		if (iio_buffer_enabled(indio_dev))
+			ret = -EBUSY;
+		else {
+			ret = kxcjk1013_set_power_state(data, true);
+			if (ret < 0) {
+				mutex_unlock(&data->mutex);
+				return ret;
+			}
+			ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
+			if (ret < 0) {
+				kxcjk1013_set_power_state(data, false);
+				mutex_unlock(&data->mutex);
+				return ret;
+			}
+			*val = sign_extend32(ret >> 4, 11);
+			ret = kxcjk1013_set_power_state(data, false);
+		}
+		mutex_unlock(&data->mutex);
+
+		if (ret < 0)
+			return ret;
+
+		return IIO_VAL_INT;
+
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = KXCJK1013_scale_table[data->range].scale;
+		return IIO_VAL_INT_PLUS_MICRO;
+
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		mutex_lock(&data->mutex);
+		ret = kxcjk1013_get_odr(data, val, val2);
+		mutex_unlock(&data->mutex);
+		return ret;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan, int val,
+			       int val2, long mask)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		mutex_lock(&data->mutex);
+		ret = kxcjk1013_set_odr(data, val, val2);
+		mutex_unlock(&data->mutex);
+		break;
+	case IIO_CHAN_INFO_SCALE:
+		if (val)
+			return -EINVAL;
+
+		mutex_lock(&data->mutex);
+		ret = kxcjk1013_set_scale(data, val2);
+		mutex_unlock(&data->mutex);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int kxcjk1013_read_event(struct iio_dev *indio_dev,
+				   const struct iio_chan_spec *chan,
+				   enum iio_event_type type,
+				   enum iio_event_direction dir,
+				   enum iio_event_info info,
+				   int *val, int *val2)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	*val2 = 0;
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		*val = data->wake_thres;
+		break;
+	case IIO_EV_INFO_PERIOD:
+		*val = data->wake_dur;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return IIO_VAL_INT;
+}
+
+static int kxcjk1013_write_event(struct iio_dev *indio_dev,
+				    const struct iio_chan_spec *chan,
+				    enum iio_event_type type,
+				    enum iio_event_direction dir,
+				    enum iio_event_info info,
+				    int val, int val2)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	if (data->ev_enable_state)
+		return -EBUSY;
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		data->wake_thres = val;
+		break;
+	case IIO_EV_INFO_PERIOD:
+		data->wake_dur = val;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
+					  const struct iio_chan_spec *chan,
+					  enum iio_event_type type,
+					  enum iio_event_direction dir)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	return data->ev_enable_state;
+}
+
+static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
+					   const struct iio_chan_spec *chan,
+					   enum iio_event_type type,
+					   enum iio_event_direction dir,
+					   int state)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+
+	if (state && data->ev_enable_state)
+		return 0;
+
+	mutex_lock(&data->mutex);
+
+	if (!state && data->motion_trigger_on) {
+		data->ev_enable_state = 0;
+		mutex_unlock(&data->mutex);
+		return 0;
+	}
+
+	/*
+	 * We will expect the enable and disable to do operation in
+	 * in reverse order. This will happen here anyway as our
+	 * resume operation uses sync mode runtime pm calls, the
+	 * suspend operation will be delayed by autosuspend delay
+	 * So the disable operation will still happen in reverse of
+	 * enable operation. When runtime pm is disabled the mode
+	 * is always on so sequence doesn't matter
+	 */
+	ret = kxcjk1013_set_power_state(data, state);
+	if (ret < 0) {
+		mutex_unlock(&data->mutex);
+		return ret;
+	}
+
+	ret =  kxcjk1013_setup_any_motion_interrupt(data, state);
+	if (ret < 0) {
+		kxcjk1013_set_power_state(data, false);
+		data->ev_enable_state = 0;
+		mutex_unlock(&data->mutex);
+		return ret;
+	}
+
+	data->ev_enable_state = state;
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+static int kxcjk1013_buffer_preenable(struct iio_dev *indio_dev)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	return kxcjk1013_set_power_state(data, true);
+}
+
+static int kxcjk1013_buffer_postdisable(struct iio_dev *indio_dev)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	return kxcjk1013_set_power_state(data, false);
+}
+
+static ssize_t kxcjk1013_get_samp_freq_avail(struct device *dev,
+					     struct device_attribute *attr,
+					     char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	const char *str;
+
+	if (data->chipset == KXTF9)
+		str = kxtf9_samp_freq_avail;
+	else
+		str = kxcjk1013_samp_freq_avail;
+
+	return sprintf(buf, "%s\n", str);
+}
+
+static IIO_DEVICE_ATTR(in_accel_sampling_frequency_available, S_IRUGO,
+		       kxcjk1013_get_samp_freq_avail, NULL, 0);
+
+static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
+
+static struct attribute *kxcjk1013_attributes[] = {
+	&iio_dev_attr_in_accel_sampling_frequency_available.dev_attr.attr,
+	&iio_const_attr_in_accel_scale_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group kxcjk1013_attrs_group = {
+	.attrs = kxcjk1013_attributes,
+};
+
+static const struct iio_event_spec kxcjk1013_event = {
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_EITHER,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
+				 BIT(IIO_EV_INFO_ENABLE) |
+				 BIT(IIO_EV_INFO_PERIOD)
+};
+
+static const struct iio_mount_matrix *
+kxcjk1013_get_mount_matrix(const struct iio_dev *indio_dev,
+			   const struct iio_chan_spec *chan)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	return &data->orientation;
+}
+
+static const struct iio_chan_spec_ext_info kxcjk1013_ext_info[] = {
+	IIO_MOUNT_MATRIX(IIO_SHARED_BY_TYPE, kxcjk1013_get_mount_matrix),
+	{ }
+};
+
+#define KXCJK1013_CHANNEL(_axis) {					\
+	.type = IIO_ACCEL,						\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##_axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
+				BIT(IIO_CHAN_INFO_SAMP_FREQ),		\
+	.scan_index = AXIS_##_axis,					\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 12,						\
+		.storagebits = 16,					\
+		.shift = 4,						\
+		.endianness = IIO_LE,					\
+	},								\
+	.event_spec = &kxcjk1013_event,				\
+	.ext_info = kxcjk1013_ext_info,					\
+	.num_event_specs = 1						\
+}
+
+static const struct iio_chan_spec kxcjk1013_channels[] = {
+	KXCJK1013_CHANNEL(X),
+	KXCJK1013_CHANNEL(Y),
+	KXCJK1013_CHANNEL(Z),
+	IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_buffer_setup_ops kxcjk1013_buffer_setup_ops = {
+	.preenable		= kxcjk1013_buffer_preenable,
+	.postdisable		= kxcjk1013_buffer_postdisable,
+};
+
+static const struct iio_info kxcjk1013_info = {
+	.attrs			= &kxcjk1013_attrs_group,
+	.read_raw		= kxcjk1013_read_raw,
+	.write_raw		= kxcjk1013_write_raw,
+	.read_event_value	= kxcjk1013_read_event,
+	.write_event_value	= kxcjk1013_write_event,
+	.write_event_config	= kxcjk1013_write_event_config,
+	.read_event_config	= kxcjk1013_read_event_config,
+};
+
+static const unsigned long kxcjk1013_scan_masks[] = {0x7, 0};
+
+static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = i2c_smbus_read_i2c_block_data_or_emulated(data->client,
+							KXCJK1013_REG_XOUT_L,
+							AXIS_MAX * 2,
+							(u8 *)data->scan.chans);
+	mutex_unlock(&data->mutex);
+	if (ret < 0)
+		goto err;
+
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+					   data->timestamp);
+err:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int kxcjk1013_trig_try_reen(struct iio_trigger *trig)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_int_rel\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
+						bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+
+	if (!state && data->ev_enable_state && data->motion_trigger_on) {
+		data->motion_trigger_on = false;
+		mutex_unlock(&data->mutex);
+		return 0;
+	}
+
+	ret = kxcjk1013_set_power_state(data, state);
+	if (ret < 0) {
+		mutex_unlock(&data->mutex);
+		return ret;
+	}
+	if (data->motion_trig == trig)
+		ret = kxcjk1013_setup_any_motion_interrupt(data, state);
+	else
+		ret = kxcjk1013_setup_new_data_interrupt(data, state);
+	if (ret < 0) {
+		kxcjk1013_set_power_state(data, false);
+		mutex_unlock(&data->mutex);
+		return ret;
+	}
+	if (data->motion_trig == trig)
+		data->motion_trigger_on = state;
+	else
+		data->dready_trigger_on = state;
+
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
+	.set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
+	.try_reenable = kxcjk1013_trig_try_reen,
+};
+
+static void kxcjk1013_report_motion_event(struct iio_dev *indio_dev)
+{
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	int ret = i2c_smbus_read_byte_data(data->client,
+					   KXCJK1013_REG_INT_SRC2);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_int_src2\n");
+		return;
+	}
+
+	if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_X,
+						  IIO_EV_TYPE_THRESH,
+						  IIO_EV_DIR_FALLING),
+			       data->timestamp);
+
+	if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_X,
+						  IIO_EV_TYPE_THRESH,
+						  IIO_EV_DIR_RISING),
+			       data->timestamp);
+
+	if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_Y,
+						  IIO_EV_TYPE_THRESH,
+						  IIO_EV_DIR_FALLING),
+			       data->timestamp);
+
+	if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_Y,
+						  IIO_EV_TYPE_THRESH,
+						  IIO_EV_DIR_RISING),
+			       data->timestamp);
+
+	if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_Z,
+						  IIO_EV_TYPE_THRESH,
+						  IIO_EV_DIR_FALLING),
+			       data->timestamp);
+
+	if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_Z,
+						  IIO_EV_TYPE_THRESH,
+						  IIO_EV_DIR_RISING),
+			       data->timestamp);
+}
+
+static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_int_src1\n");
+		goto ack_intr;
+	}
+
+	if (ret & KXCJK1013_REG_INT_SRC1_BIT_WUFS) {
+		if (data->chipset == KXTF9)
+			iio_push_event(indio_dev,
+				       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+				       0,
+				       IIO_MOD_X_AND_Y_AND_Z,
+				       IIO_EV_TYPE_THRESH,
+				       IIO_EV_DIR_RISING),
+				       data->timestamp);
+		else
+			kxcjk1013_report_motion_event(indio_dev);
+	}
+
+ack_intr:
+	if (data->dready_trigger_on)
+		return IRQ_HANDLED;
+
+	ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
+	if (ret < 0)
+		dev_err(&data->client->dev, "Error reading reg_int_rel\n");
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	data->timestamp = iio_get_time_ns(indio_dev);
+
+	if (data->dready_trigger_on)
+		iio_trigger_poll(data->dready_trig);
+	else if (data->motion_trigger_on)
+		iio_trigger_poll(data->motion_trig);
+
+	if (data->ev_enable_state)
+		return IRQ_WAKE_THREAD;
+	else
+		return IRQ_HANDLED;
+}
+
+static const char *kxcjk1013_match_acpi_device(struct device *dev,
+					       enum kx_chipset *chipset,
+					       enum kx_acpi_type *acpi_type)
+{
+	const struct acpi_device_id *id;
+
+	id = acpi_match_device(dev->driver->acpi_match_table, dev);
+	if (!id)
+		return NULL;
+
+	if (strcmp(id->id, "SMO8500") == 0)
+		*acpi_type = ACPI_SMO8500;
+	else if (strcmp(id->id, "KIOX010A") == 0)
+		*acpi_type = ACPI_KIOX010A;
+
+	*chipset = (enum kx_chipset)id->driver_data;
+
+	return dev_name(dev);
+}
+
+static int kxcjk1013_probe(struct i2c_client *client,
+			   const struct i2c_device_id *id)
+{
+	struct kxcjk1013_data *data;
+	struct iio_dev *indio_dev;
+	struct kxcjk_1013_platform_data *pdata;
+	const char *name;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	data->client = client;
+
+	pdata = dev_get_platdata(&client->dev);
+	if (pdata) {
+		data->active_high_intr = pdata->active_high_intr;
+		data->orientation = pdata->orientation;
+	} else {
+		data->active_high_intr = true; /* default polarity */
+
+		ret = iio_read_mount_matrix(&client->dev, "mount-matrix",
+					    &data->orientation);
+		if (ret)
+			return ret;
+	}
+
+	if (id) {
+		data->chipset = (enum kx_chipset)(id->driver_data);
+		name = id->name;
+	} else if (ACPI_HANDLE(&client->dev)) {
+		name = kxcjk1013_match_acpi_device(&client->dev,
+						   &data->chipset,
+						   &data->acpi_type);
+	} else
+		return -ENODEV;
+
+	ret = kxcjk1013_chip_init(data);
+	if (ret < 0)
+		return ret;
+
+	mutex_init(&data->mutex);
+
+	indio_dev->channels = kxcjk1013_channels;
+	indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
+	indio_dev->available_scan_masks = kxcjk1013_scan_masks;
+	indio_dev->name = name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &kxcjk1013_info;
+
+	if (client->irq > 0 && data->acpi_type != ACPI_SMO8500) {
+		ret = devm_request_threaded_irq(&client->dev, client->irq,
+						kxcjk1013_data_rdy_trig_poll,
+						kxcjk1013_event_handler,
+						IRQF_TRIGGER_RISING,
+						KXCJK1013_IRQ_NAME,
+						indio_dev);
+		if (ret)
+			goto err_poweroff;
+
+		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
+							   "%s-dev%d",
+							   indio_dev->name,
+							   indio_dev->id);
+		if (!data->dready_trig) {
+			ret = -ENOMEM;
+			goto err_poweroff;
+		}
+
+		data->motion_trig = devm_iio_trigger_alloc(&client->dev,
+							  "%s-any-motion-dev%d",
+							  indio_dev->name,
+							  indio_dev->id);
+		if (!data->motion_trig) {
+			ret = -ENOMEM;
+			goto err_poweroff;
+		}
+
+		data->dready_trig->dev.parent = &client->dev;
+		data->dready_trig->ops = &kxcjk1013_trigger_ops;
+		iio_trigger_set_drvdata(data->dready_trig, indio_dev);
+		indio_dev->trig = data->dready_trig;
+		iio_trigger_get(indio_dev->trig);
+		ret = iio_trigger_register(data->dready_trig);
+		if (ret)
+			goto err_poweroff;
+
+		data->motion_trig->dev.parent = &client->dev;
+		data->motion_trig->ops = &kxcjk1013_trigger_ops;
+		iio_trigger_set_drvdata(data->motion_trig, indio_dev);
+		ret = iio_trigger_register(data->motion_trig);
+		if (ret) {
+			data->motion_trig = NULL;
+			goto err_trigger_unregister;
+		}
+	}
+
+	ret = iio_triggered_buffer_setup(indio_dev,
+					 &iio_pollfunc_store_time,
+					 kxcjk1013_trigger_handler,
+					 &kxcjk1013_buffer_setup_ops);
+	if (ret < 0) {
+		dev_err(&client->dev, "iio triggered buffer setup failed\n");
+		goto err_trigger_unregister;
+	}
+
+	ret = pm_runtime_set_active(&client->dev);
+	if (ret)
+		goto err_buffer_cleanup;
+
+	pm_runtime_enable(&client->dev);
+	pm_runtime_set_autosuspend_delay(&client->dev,
+					 KXCJK1013_SLEEP_DELAY_MS);
+	pm_runtime_use_autosuspend(&client->dev);
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "unable to register iio device\n");
+		goto err_pm_cleanup;
+	}
+
+	return 0;
+
+err_pm_cleanup:
+	pm_runtime_dont_use_autosuspend(&client->dev);
+	pm_runtime_disable(&client->dev);
+err_buffer_cleanup:
+	iio_triggered_buffer_cleanup(indio_dev);
+err_trigger_unregister:
+	if (data->dready_trig)
+		iio_trigger_unregister(data->dready_trig);
+	if (data->motion_trig)
+		iio_trigger_unregister(data->motion_trig);
+err_poweroff:
+	kxcjk1013_set_mode(data, STANDBY);
+
+	return ret;
+}
+
+static int kxcjk1013_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	pm_runtime_disable(&client->dev);
+	pm_runtime_set_suspended(&client->dev);
+	pm_runtime_put_noidle(&client->dev);
+
+	iio_triggered_buffer_cleanup(indio_dev);
+	if (data->dready_trig) {
+		iio_trigger_unregister(data->dready_trig);
+		iio_trigger_unregister(data->motion_trig);
+	}
+
+	mutex_lock(&data->mutex);
+	kxcjk1013_set_mode(data, STANDBY);
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int kxcjk1013_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = kxcjk1013_set_mode(data, STANDBY);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static int kxcjk1013_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret = 0;
+
+	mutex_lock(&data->mutex);
+	ret = kxcjk1013_set_mode(data, OPERATION);
+	if (ret == 0)
+		ret = kxcjk1013_set_range(data, data->range);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+#endif
+
+#ifdef CONFIG_PM
+static int kxcjk1013_runtime_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = kxcjk1013_set_mode(data, STANDBY);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "powering off device failed\n");
+		return -EAGAIN;
+	}
+	return 0;
+}
+
+static int kxcjk1013_runtime_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct kxcjk1013_data *data = iio_priv(indio_dev);
+	int ret;
+	int sleep_val;
+
+	ret = kxcjk1013_set_mode(data, OPERATION);
+	if (ret < 0)
+		return ret;
+
+	sleep_val = kxcjk1013_get_startup_times(data);
+	if (sleep_val < 20000)
+		usleep_range(sleep_val, 20000);
+	else
+		msleep_interruptible(sleep_val/1000);
+
+	return 0;
+}
+#endif
+
+static const struct dev_pm_ops kxcjk1013_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
+	SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
+			   kxcjk1013_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id kx_acpi_match[] = {
+	{"KXCJ1013", KXCJK1013},
+	{"KXCJ1008", KXCJ91008},
+	{"KXCJ9000", KXCJ91008},
+	{"KIOX0008", KXCJ91008},
+	{"KIOX0009", KXTJ21009},
+	{"KIOX000A", KXCJ91008},
+	{"KIOX010A", KXCJ91008}, /* KXCJ91008 in the display of a yoga 2-in-1 */
+	{"KIOX020A", KXCJ91008}, /* KXCJ91008 in the base of a yoga 2-in-1 */
+	{"KXTJ1009", KXTJ21009},
+	{"KXJ2109",  KXTJ21009},
+	{"SMO8500",  KXCJ91008},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
+
+static const struct i2c_device_id kxcjk1013_id[] = {
+	{"kxcjk1013", KXCJK1013},
+	{"kxcj91008", KXCJ91008},
+	{"kxtj21009", KXTJ21009},
+	{"kxtf9",     KXTF9},
+	{"SMO8500",   KXCJ91008},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
+
+static const struct of_device_id kxcjk1013_of_match[] = {
+	{ .compatible = "kionix,kxcjk1013", },
+	{ .compatible = "kionix,kxcj91008", },
+	{ .compatible = "kionix,kxtj21009", },
+	{ .compatible = "kionix,kxtf9", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, kxcjk1013_of_match);
+
+static struct i2c_driver kxcjk1013_driver = {
+	.driver = {
+		.name	= KXCJK1013_DRV_NAME,
+		.acpi_match_table = ACPI_PTR(kx_acpi_match),
+		.of_match_table = kxcjk1013_of_match,
+		.pm	= &kxcjk1013_pm_ops,
+	},
+	.probe		= kxcjk1013_probe,
+	.remove		= kxcjk1013_remove,
+	.id_table	= kxcjk1013_id,
+};
+module_i2c_driver(kxcjk1013_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");
diff --git a/drivers/iio/accel/kxsd9-i2c.c b/drivers/iio/accel/kxsd9-i2c.c
new file mode 100644
index 000000000..b580d605f
--- /dev/null
+++ b/drivers/iio/accel/kxsd9-i2c.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/regmap.h>
+
+#include "kxsd9.h"
+
+static int kxsd9_i2c_probe(struct i2c_client *i2c,
+			   const struct i2c_device_id *id)
+{
+	static const struct regmap_config config = {
+		.reg_bits = 8,
+		.val_bits = 8,
+		.max_register = 0x0e,
+	};
+	struct regmap *regmap;
+
+	regmap = devm_regmap_init_i2c(i2c, &config);
+	if (IS_ERR(regmap)) {
+		dev_err(&i2c->dev, "Failed to register i2c regmap: %pe\n",
+			regmap);
+		return PTR_ERR(regmap);
+	}
+
+	return kxsd9_common_probe(&i2c->dev,
+				  regmap,
+				  i2c->name);
+}
+
+static int kxsd9_i2c_remove(struct i2c_client *client)
+{
+	return kxsd9_common_remove(&client->dev);
+}
+
+static const struct of_device_id kxsd9_of_match[] = {
+	{ .compatible = "kionix,kxsd9", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, kxsd9_of_match);
+
+static const struct i2c_device_id kxsd9_i2c_id[] = {
+	{"kxsd9", 0},
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, kxsd9_i2c_id);
+
+static struct i2c_driver kxsd9_i2c_driver = {
+	.driver = {
+		.name	= "kxsd9",
+		.of_match_table = kxsd9_of_match,
+		.pm = &kxsd9_dev_pm_ops,
+	},
+	.probe		= kxsd9_i2c_probe,
+	.remove		= kxsd9_i2c_remove,
+	.id_table	= kxsd9_i2c_id,
+};
+module_i2c_driver(kxsd9_i2c_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("KXSD9 accelerometer I2C interface");
diff --git a/drivers/iio/accel/kxsd9-spi.c b/drivers/iio/accel/kxsd9-spi.c
new file mode 100644
index 000000000..7971ec1ee
--- /dev/null
+++ b/drivers/iio/accel/kxsd9-spi.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/spi/spi.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "kxsd9.h"
+
+static int kxsd9_spi_probe(struct spi_device *spi)
+{
+	static const struct regmap_config config = {
+		.reg_bits = 8,
+		.val_bits = 8,
+		.max_register = 0x0e,
+	};
+	struct regmap *regmap;
+
+	spi->mode = SPI_MODE_0;
+	regmap = devm_regmap_init_spi(spi, &config);
+	if (IS_ERR(regmap)) {
+		dev_err(&spi->dev, "%s: regmap allocation failed: %ld\n",
+			__func__, PTR_ERR(regmap));
+		return PTR_ERR(regmap);
+	}
+
+	return kxsd9_common_probe(&spi->dev,
+				  regmap,
+				  spi_get_device_id(spi)->name);
+}
+
+static int kxsd9_spi_remove(struct spi_device *spi)
+{
+	return kxsd9_common_remove(&spi->dev);
+}
+
+static const struct spi_device_id kxsd9_spi_id[] = {
+	{"kxsd9", 0},
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, kxsd9_spi_id);
+
+static const struct of_device_id kxsd9_of_match[] = {
+        { .compatible = "kionix,kxsd9" },
+        { },
+};
+MODULE_DEVICE_TABLE(of, kxsd9_of_match);
+
+static struct spi_driver kxsd9_spi_driver = {
+	.driver = {
+		.name = "kxsd9",
+		.pm = &kxsd9_dev_pm_ops,
+		.of_match_table = kxsd9_of_match,
+	},
+	.probe = kxsd9_spi_probe,
+	.remove = kxsd9_spi_remove,
+	.id_table = kxsd9_spi_id,
+};
+module_spi_driver(kxsd9_spi_driver);
+
+MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
+MODULE_DESCRIPTION("Kionix KXSD9 SPI driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c
new file mode 100644
index 000000000..a51568ba8
--- /dev/null
+++ b/drivers/iio/accel/kxsd9.c
@@ -0,0 +1,525 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * kxsd9.c	simple support for the Kionix KXSD9 3D
+ *		accelerometer.
+ *
+ * Copyright (c) 2008-2009 Jonathan Cameron <jic23@kernel.org>
+ *
+ * The i2c interface is very similar, so shouldn't be a problem once
+ * I have a suitable wire made up.
+ *
+ * TODO:	Support the motion detector
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/sysfs.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+
+#include "kxsd9.h"
+
+#define KXSD9_REG_X		0x00
+#define KXSD9_REG_Y		0x02
+#define KXSD9_REG_Z		0x04
+#define KXSD9_REG_AUX		0x06
+#define KXSD9_REG_RESET		0x0a
+#define KXSD9_REG_CTRL_C	0x0c
+
+#define KXSD9_CTRL_C_FS_MASK	0x03
+#define KXSD9_CTRL_C_FS_8G	0x00
+#define KXSD9_CTRL_C_FS_6G	0x01
+#define KXSD9_CTRL_C_FS_4G	0x02
+#define KXSD9_CTRL_C_FS_2G	0x03
+#define KXSD9_CTRL_C_MOT_LAT	BIT(3)
+#define KXSD9_CTRL_C_MOT_LEV	BIT(4)
+#define KXSD9_CTRL_C_LP_MASK	0xe0
+#define KXSD9_CTRL_C_LP_NONE	0x00
+#define KXSD9_CTRL_C_LP_2000HZC	BIT(5)
+#define KXSD9_CTRL_C_LP_2000HZB	BIT(6)
+#define KXSD9_CTRL_C_LP_2000HZA	(BIT(5)|BIT(6))
+#define KXSD9_CTRL_C_LP_1000HZ	BIT(7)
+#define KXSD9_CTRL_C_LP_500HZ	(BIT(7)|BIT(5))
+#define KXSD9_CTRL_C_LP_100HZ	(BIT(7)|BIT(6))
+#define KXSD9_CTRL_C_LP_50HZ	(BIT(7)|BIT(6)|BIT(5))
+
+#define KXSD9_REG_CTRL_B	0x0d
+
+#define KXSD9_CTRL_B_CLK_HLD	BIT(7)
+#define KXSD9_CTRL_B_ENABLE	BIT(6)
+#define KXSD9_CTRL_B_ST		BIT(5) /* Self-test */
+
+#define KXSD9_REG_CTRL_A	0x0e
+
+/**
+ * struct kxsd9_state - device related storage
+ * @dev: pointer to the parent device
+ * @map: regmap to the device
+ * @orientation: mounting matrix, flipped axis etc
+ * @regs: regulators for this device, VDD and IOVDD
+ * @scale: the current scaling setting
+ */
+struct kxsd9_state {
+	struct device *dev;
+	struct regmap *map;
+	struct iio_mount_matrix orientation;
+	struct regulator_bulk_data regs[2];
+	u8 scale;
+};
+
+#define KXSD9_SCALE_2G "0.011978"
+#define KXSD9_SCALE_4G "0.023927"
+#define KXSD9_SCALE_6G "0.035934"
+#define KXSD9_SCALE_8G "0.047853"
+
+/* reverse order */
+static const int kxsd9_micro_scales[4] = { 47853, 35934, 23927, 11978 };
+
+#define KXSD9_ZERO_G_OFFSET -2048
+
+/*
+ * Regulator names
+ */
+static const char kxsd9_reg_vdd[] = "vdd";
+static const char kxsd9_reg_iovdd[] = "iovdd";
+
+static int kxsd9_write_scale(struct iio_dev *indio_dev, int micro)
+{
+	int ret, i;
+	struct kxsd9_state *st = iio_priv(indio_dev);
+	bool foundit = false;
+
+	for (i = 0; i < 4; i++)
+		if (micro == kxsd9_micro_scales[i]) {
+			foundit = true;
+			break;
+		}
+	if (!foundit)
+		return -EINVAL;
+
+	ret = regmap_update_bits(st->map,
+				 KXSD9_REG_CTRL_C,
+				 KXSD9_CTRL_C_FS_MASK,
+				 i);
+	if (ret < 0)
+		goto error_ret;
+
+	/* Cached scale when the sensor is powered down */
+	st->scale = i;
+
+error_ret:
+	return ret;
+}
+
+static IIO_CONST_ATTR(accel_scale_available,
+		KXSD9_SCALE_2G " "
+		KXSD9_SCALE_4G " "
+		KXSD9_SCALE_6G " "
+		KXSD9_SCALE_8G);
+
+static struct attribute *kxsd9_attributes[] = {
+	&iio_const_attr_accel_scale_available.dev_attr.attr,
+	NULL,
+};
+
+static int kxsd9_write_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan,
+			   int val,
+			   int val2,
+			   long mask)
+{
+	int ret = -EINVAL;
+	struct kxsd9_state *st = iio_priv(indio_dev);
+
+	pm_runtime_get_sync(st->dev);
+
+	if (mask == IIO_CHAN_INFO_SCALE) {
+		/* Check no integer component */
+		if (val)
+			return -EINVAL;
+		ret = kxsd9_write_scale(indio_dev, val2);
+	}
+
+	pm_runtime_mark_last_busy(st->dev);
+	pm_runtime_put_autosuspend(st->dev);
+
+	return ret;
+}
+
+static int kxsd9_read_raw(struct iio_dev *indio_dev,
+			  struct iio_chan_spec const *chan,
+			  int *val, int *val2, long mask)
+{
+	int ret = -EINVAL;
+	struct kxsd9_state *st = iio_priv(indio_dev);
+	unsigned int regval;
+	__be16 raw_val;
+	u16 nval;
+
+	pm_runtime_get_sync(st->dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = regmap_bulk_read(st->map, chan->address, &raw_val,
+				       sizeof(raw_val));
+		if (ret)
+			goto error_ret;
+		nval = be16_to_cpu(raw_val);
+		/* Only 12 bits are valid */
+		nval >>= 4;
+		*val = nval;
+		ret = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_OFFSET:
+		/* This has a bias of -2048 */
+		*val = KXSD9_ZERO_G_OFFSET;
+		ret = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_SCALE:
+		ret = regmap_read(st->map,
+				  KXSD9_REG_CTRL_C,
+				  &regval);
+		if (ret < 0)
+			goto error_ret;
+		*val = 0;
+		*val2 = kxsd9_micro_scales[regval & KXSD9_CTRL_C_FS_MASK];
+		ret = IIO_VAL_INT_PLUS_MICRO;
+		break;
+	}
+
+error_ret:
+	pm_runtime_mark_last_busy(st->dev);
+	pm_runtime_put_autosuspend(st->dev);
+
+	return ret;
+};
+
+static irqreturn_t kxsd9_trigger_handler(int irq, void *p)
+{
+	const struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct kxsd9_state *st = iio_priv(indio_dev);
+	/*
+	 * Ensure correct positioning and alignment of timestamp.
+	 * No need to zero initialize as all elements written.
+	 */
+	struct {
+		__be16 chan[4];
+		s64 ts __aligned(8);
+	} hw_values;
+	int ret;
+
+	ret = regmap_bulk_read(st->map,
+			       KXSD9_REG_X,
+			       hw_values.chan,
+			       sizeof(hw_values.chan));
+	if (ret) {
+		dev_err(st->dev, "error reading data: %d\n", ret);
+		goto out;
+	}
+
+	iio_push_to_buffers_with_timestamp(indio_dev,
+					   &hw_values,
+					   iio_get_time_ns(indio_dev));
+out:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int kxsd9_buffer_preenable(struct iio_dev *indio_dev)
+{
+	struct kxsd9_state *st = iio_priv(indio_dev);
+
+	pm_runtime_get_sync(st->dev);
+
+	return 0;
+}
+
+static int kxsd9_buffer_postdisable(struct iio_dev *indio_dev)
+{
+	struct kxsd9_state *st = iio_priv(indio_dev);
+
+	pm_runtime_mark_last_busy(st->dev);
+	pm_runtime_put_autosuspend(st->dev);
+
+	return 0;
+}
+
+static const struct iio_buffer_setup_ops kxsd9_buffer_setup_ops = {
+	.preenable = kxsd9_buffer_preenable,
+	.postdisable = kxsd9_buffer_postdisable,
+};
+
+static const struct iio_mount_matrix *
+kxsd9_get_mount_matrix(const struct iio_dev *indio_dev,
+		       const struct iio_chan_spec *chan)
+{
+	struct kxsd9_state *st = iio_priv(indio_dev);
+
+	return &st->orientation;
+}
+
+static const struct iio_chan_spec_ext_info kxsd9_ext_info[] = {
+	IIO_MOUNT_MATRIX(IIO_SHARED_BY_TYPE, kxsd9_get_mount_matrix),
+	{ },
+};
+
+#define KXSD9_ACCEL_CHAN(axis, index)						\
+	{								\
+		.type = IIO_ACCEL,					\
+		.modified = 1,						\
+		.channel2 = IIO_MOD_##axis,				\
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |	\
+					BIT(IIO_CHAN_INFO_OFFSET),	\
+		.ext_info = kxsd9_ext_info,				\
+		.address = KXSD9_REG_##axis,				\
+		.scan_index = index,					\
+		.scan_type = {                                          \
+			.sign = 'u',					\
+			.realbits = 12,					\
+			.storagebits = 16,				\
+			.shift = 4,					\
+			.endianness = IIO_BE,				\
+		},							\
+	}
+
+static const struct iio_chan_spec kxsd9_channels[] = {
+	KXSD9_ACCEL_CHAN(X, 0),
+	KXSD9_ACCEL_CHAN(Y, 1),
+	KXSD9_ACCEL_CHAN(Z, 2),
+	{
+		.type = IIO_VOLTAGE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.indexed = 1,
+		.address = KXSD9_REG_AUX,
+		.scan_index = 3,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 12,
+			.storagebits = 16,
+			.shift = 4,
+			.endianness = IIO_BE,
+		},
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static const struct attribute_group kxsd9_attribute_group = {
+	.attrs = kxsd9_attributes,
+};
+
+static int kxsd9_power_up(struct kxsd9_state *st)
+{
+	int ret;
+
+	/* Enable the regulators */
+	ret = regulator_bulk_enable(ARRAY_SIZE(st->regs), st->regs);
+	if (ret) {
+		dev_err(st->dev, "Cannot enable regulators\n");
+		return ret;
+	}
+
+	/* Power up */
+	ret = regmap_write(st->map,
+			   KXSD9_REG_CTRL_B,
+			   KXSD9_CTRL_B_ENABLE);
+	if (ret)
+		return ret;
+
+	/*
+	 * Set 1000Hz LPF, 2g fullscale, motion wakeup threshold 1g,
+	 * latched wakeup
+	 */
+	ret = regmap_write(st->map,
+			   KXSD9_REG_CTRL_C,
+			   KXSD9_CTRL_C_LP_1000HZ |
+			   KXSD9_CTRL_C_MOT_LEV	|
+			   KXSD9_CTRL_C_MOT_LAT |
+			   st->scale);
+	if (ret)
+		return ret;
+
+	/*
+	 * Power-up time depends on the LPF setting, but typ 15.9 ms, let's
+	 * set 20 ms to allow for some slack.
+	 */
+	msleep(20);
+
+	return 0;
+};
+
+static int kxsd9_power_down(struct kxsd9_state *st)
+{
+	int ret;
+
+	/*
+	 * Set into low power mode - since there may be more users of the
+	 * regulators this is the first step of the power saving: it will
+	 * make sure we conserve power even if there are others users on the
+	 * regulators.
+	 */
+	ret = regmap_update_bits(st->map,
+				 KXSD9_REG_CTRL_B,
+				 KXSD9_CTRL_B_ENABLE,
+				 0);
+	if (ret)
+		return ret;
+
+	/* Disable the regulators */
+	ret = regulator_bulk_disable(ARRAY_SIZE(st->regs), st->regs);
+	if (ret) {
+		dev_err(st->dev, "Cannot disable regulators\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct iio_info kxsd9_info = {
+	.read_raw = &kxsd9_read_raw,
+	.write_raw = &kxsd9_write_raw,
+	.attrs = &kxsd9_attribute_group,
+};
+
+/* Four channels apart from timestamp, scan mask = 0x0f */
+static const unsigned long kxsd9_scan_masks[] = { 0xf, 0 };
+
+int kxsd9_common_probe(struct device *dev,
+		       struct regmap *map,
+		       const char *name)
+{
+	struct iio_dev *indio_dev;
+	struct kxsd9_state *st;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+	st->dev = dev;
+	st->map = map;
+
+	indio_dev->channels = kxsd9_channels;
+	indio_dev->num_channels = ARRAY_SIZE(kxsd9_channels);
+	indio_dev->name = name;
+	indio_dev->info = &kxsd9_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->available_scan_masks = kxsd9_scan_masks;
+
+	/* Read the mounting matrix, if present */
+	ret = iio_read_mount_matrix(dev, "mount-matrix", &st->orientation);
+	if (ret)
+		return ret;
+
+	/* Fetch and turn on regulators */
+	st->regs[0].supply = kxsd9_reg_vdd;
+	st->regs[1].supply = kxsd9_reg_iovdd;
+	ret = devm_regulator_bulk_get(dev,
+				      ARRAY_SIZE(st->regs),
+				      st->regs);
+	if (ret) {
+		dev_err(dev, "Cannot get regulators\n");
+		return ret;
+	}
+	/* Default scaling */
+	st->scale = KXSD9_CTRL_C_FS_2G;
+
+	kxsd9_power_up(st);
+
+	ret = iio_triggered_buffer_setup(indio_dev,
+					 iio_pollfunc_store_time,
+					 kxsd9_trigger_handler,
+					 &kxsd9_buffer_setup_ops);
+	if (ret) {
+		dev_err(dev, "triggered buffer setup failed\n");
+		goto err_power_down;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret)
+		goto err_cleanup_buffer;
+
+	dev_set_drvdata(dev, indio_dev);
+
+	/* Enable runtime PM */
+	pm_runtime_get_noresume(dev);
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+	/*
+	 * Set autosuspend to two orders of magnitude larger than the
+	 * start-up time. 20ms start-up time means 2000ms autosuspend,
+	 * i.e. 2 seconds.
+	 */
+	pm_runtime_set_autosuspend_delay(dev, 2000);
+	pm_runtime_use_autosuspend(dev);
+	pm_runtime_put(dev);
+
+	return 0;
+
+err_cleanup_buffer:
+	iio_triggered_buffer_cleanup(indio_dev);
+err_power_down:
+	kxsd9_power_down(st);
+
+	return ret;
+}
+EXPORT_SYMBOL(kxsd9_common_probe);
+
+int kxsd9_common_remove(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct kxsd9_state *st = iio_priv(indio_dev);
+
+	iio_triggered_buffer_cleanup(indio_dev);
+	iio_device_unregister(indio_dev);
+	pm_runtime_get_sync(dev);
+	pm_runtime_put_noidle(dev);
+	pm_runtime_disable(dev);
+	kxsd9_power_down(st);
+
+	return 0;
+}
+EXPORT_SYMBOL(kxsd9_common_remove);
+
+#ifdef CONFIG_PM
+static int kxsd9_runtime_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct kxsd9_state *st = iio_priv(indio_dev);
+
+	return kxsd9_power_down(st);
+}
+
+static int kxsd9_runtime_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct kxsd9_state *st = iio_priv(indio_dev);
+
+	return kxsd9_power_up(st);
+}
+#endif /* CONFIG_PM */
+
+const struct dev_pm_ops kxsd9_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(kxsd9_runtime_suspend,
+			   kxsd9_runtime_resume, NULL)
+};
+EXPORT_SYMBOL(kxsd9_dev_pm_ops);
+
+MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
+MODULE_DESCRIPTION("Kionix KXSD9 driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/kxsd9.h b/drivers/iio/accel/kxsd9.h
new file mode 100644
index 000000000..5e3ca212f
--- /dev/null
+++ b/drivers/iio/accel/kxsd9.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/device.h>
+#include <linux/kernel.h>
+
+#define KXSD9_STATE_RX_SIZE 2
+#define KXSD9_STATE_TX_SIZE 2
+
+int kxsd9_common_probe(struct device *dev,
+		       struct regmap *map,
+		       const char *name);
+int kxsd9_common_remove(struct device *dev);
+
+extern const struct dev_pm_ops kxsd9_dev_pm_ops;
diff --git a/drivers/iio/accel/mc3230.c b/drivers/iio/accel/mc3230.c
new file mode 100644
index 000000000..46e4283fc
--- /dev/null
+++ b/drivers/iio/accel/mc3230.c
@@ -0,0 +1,205 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * mCube MC3230 3-Axis Accelerometer
+ *
+ * Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com>
+ *
+ * IIO driver for mCube MC3230; 7-bit I2C address: 0x4c.
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define MC3230_REG_XOUT			0x00
+#define MC3230_REG_YOUT			0x01
+#define MC3230_REG_ZOUT			0x02
+
+#define MC3230_REG_MODE			0x07
+#define MC3230_MODE_OPCON_MASK		0x03
+#define MC3230_MODE_OPCON_WAKE		0x01
+#define MC3230_MODE_OPCON_STANDBY	0x03
+
+#define MC3230_REG_CHIP_ID		0x18
+#define MC3230_CHIP_ID			0x01
+
+#define MC3230_REG_PRODUCT_CODE		0x3b
+#define MC3230_PRODUCT_CODE		0x19
+
+/*
+ * The accelerometer has one measurement range:
+ *
+ * -1.5g - +1.5g (8-bit, signed)
+ *
+ * scale = (1.5 + 1.5) * 9.81 / (2^8 - 1)	= 0.115411765
+ */
+
+static const int mc3230_nscale = 115411765;
+
+#define MC3230_CHANNEL(reg, axis) {	\
+	.type = IIO_ACCEL,	\
+	.address = reg,	\
+	.modified = 1,	\
+	.channel2 = IIO_MOD_##axis,	\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+}
+
+static const struct iio_chan_spec mc3230_channels[] = {
+	MC3230_CHANNEL(MC3230_REG_XOUT, X),
+	MC3230_CHANNEL(MC3230_REG_YOUT, Y),
+	MC3230_CHANNEL(MC3230_REG_ZOUT, Z),
+};
+
+struct mc3230_data {
+	struct i2c_client *client;
+};
+
+static int mc3230_set_opcon(struct mc3230_data *data, int opcon)
+{
+	int ret;
+	struct i2c_client *client = data->client;
+
+	ret = i2c_smbus_read_byte_data(client, MC3230_REG_MODE);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to read mode reg: %d\n", ret);
+		return ret;
+	}
+
+	ret &= ~MC3230_MODE_OPCON_MASK;
+	ret |= opcon;
+
+	ret = i2c_smbus_write_byte_data(client, MC3230_REG_MODE, ret);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to write mode reg: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int mc3230_read_raw(struct iio_dev *indio_dev,
+				struct iio_chan_spec const *chan,
+				int *val, int *val2, long mask)
+{
+	struct mc3230_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = i2c_smbus_read_byte_data(data->client, chan->address);
+		if (ret < 0)
+			return ret;
+		*val = sign_extend32(ret, 7);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = mc3230_nscale;
+		return IIO_VAL_INT_PLUS_NANO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info mc3230_info = {
+	.read_raw	= mc3230_read_raw,
+};
+
+static int mc3230_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct mc3230_data *data;
+
+	/* First check chip-id and product-id */
+	ret = i2c_smbus_read_byte_data(client, MC3230_REG_CHIP_ID);
+	if (ret != MC3230_CHIP_ID)
+		return (ret < 0) ? ret : -ENODEV;
+
+	ret = i2c_smbus_read_byte_data(client, MC3230_REG_PRODUCT_CODE);
+	if (ret != MC3230_PRODUCT_CODE)
+		return (ret < 0) ? ret : -ENODEV;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev) {
+		dev_err(&client->dev, "iio allocation failed!\n");
+		return -ENOMEM;
+	}
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	i2c_set_clientdata(client, indio_dev);
+
+	indio_dev->info = &mc3230_info;
+	indio_dev->name = "mc3230";
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = mc3230_channels;
+	indio_dev->num_channels = ARRAY_SIZE(mc3230_channels);
+
+	ret = mc3230_set_opcon(data, MC3230_MODE_OPCON_WAKE);
+	if (ret < 0)
+		return ret;
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "device_register failed\n");
+		mc3230_set_opcon(data, MC3230_MODE_OPCON_STANDBY);
+	}
+
+	return ret;
+}
+
+static int mc3230_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+	iio_device_unregister(indio_dev);
+
+	return mc3230_set_opcon(iio_priv(indio_dev), MC3230_MODE_OPCON_STANDBY);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int mc3230_suspend(struct device *dev)
+{
+	struct mc3230_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return mc3230_set_opcon(data, MC3230_MODE_OPCON_STANDBY);
+}
+
+static int mc3230_resume(struct device *dev)
+{
+	struct mc3230_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return mc3230_set_opcon(data, MC3230_MODE_OPCON_WAKE);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(mc3230_pm_ops, mc3230_suspend, mc3230_resume);
+
+static const struct i2c_device_id mc3230_i2c_id[] = {
+	{"mc3230", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, mc3230_i2c_id);
+
+static struct i2c_driver mc3230_driver = {
+	.driver = {
+		.name = "mc3230",
+		.pm = &mc3230_pm_ops,
+	},
+	.probe		= mc3230_probe,
+	.remove		= mc3230_remove,
+	.id_table	= mc3230_i2c_id,
+};
+
+module_i2c_driver(mc3230_driver);
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("mCube MC3230 3-Axis Accelerometer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/mma7455.h b/drivers/iio/accel/mma7455.h
new file mode 100644
index 000000000..4e3fa988f
--- /dev/null
+++ b/drivers/iio/accel/mma7455.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * IIO accel driver for Freescale MMA7455L 3-axis 10-bit accelerometer
+ * Copyright 2015 Joachim Eastwood <manabian@gmail.com>
+ */
+
+#ifndef __MMA7455_H
+#define __MMA7455_H
+
+extern const struct regmap_config mma7455_core_regmap;
+
+int mma7455_core_probe(struct device *dev, struct regmap *regmap,
+		       const char *name);
+int mma7455_core_remove(struct device *dev);
+
+#endif
diff --git a/drivers/iio/accel/mma7455_core.c b/drivers/iio/accel/mma7455_core.c
new file mode 100644
index 000000000..922bd38ff
--- /dev/null
+++ b/drivers/iio/accel/mma7455_core.c
@@ -0,0 +1,314 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * IIO accel core driver for Freescale MMA7455L 3-axis 10-bit accelerometer
+ * Copyright 2015 Joachim Eastwood <manabian@gmail.com>
+ *
+ * UNSUPPORTED hardware features:
+ *  - 8-bit mode with different scales
+ *  - INT1/INT2 interrupts
+ *  - Offset calibration
+ *  - Events
+ */
+
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "mma7455.h"
+
+#define MMA7455_REG_XOUTL		0x00
+#define MMA7455_REG_XOUTH		0x01
+#define MMA7455_REG_YOUTL		0x02
+#define MMA7455_REG_YOUTH		0x03
+#define MMA7455_REG_ZOUTL		0x04
+#define MMA7455_REG_ZOUTH		0x05
+#define MMA7455_REG_STATUS		0x09
+#define  MMA7455_STATUS_DRDY		BIT(0)
+#define MMA7455_REG_WHOAMI		0x0f
+#define  MMA7455_WHOAMI_ID		0x55
+#define MMA7455_REG_MCTL		0x16
+#define  MMA7455_MCTL_MODE_STANDBY	0x00
+#define  MMA7455_MCTL_MODE_MEASURE	0x01
+#define MMA7455_REG_CTL1		0x18
+#define  MMA7455_CTL1_DFBW_MASK		BIT(7)
+#define  MMA7455_CTL1_DFBW_125HZ	BIT(7)
+#define  MMA7455_CTL1_DFBW_62_5HZ	0
+#define MMA7455_REG_TW			0x1e
+
+/*
+ * When MMA7455 is used in 10-bit it has a fullscale of -8g
+ * corresponding to raw value -512. The userspace interface
+ * uses m/s^2 and we declare micro units.
+ * So scale factor is given by:
+ *       g * 8 * 1e6 / 512 = 153228.90625, with g = 9.80665
+ */
+#define MMA7455_10BIT_SCALE	153229
+
+struct mma7455_data {
+	struct regmap *regmap;
+	/*
+	 * Used to reorganize data.  Will ensure correct alignment of
+	 * the timestamp if present
+	 */
+	struct {
+		__le16 channels[3];
+		s64 ts __aligned(8);
+	} scan;
+};
+
+static int mma7455_drdy(struct mma7455_data *mma7455)
+{
+	struct device *dev = regmap_get_device(mma7455->regmap);
+	unsigned int reg;
+	int tries = 3;
+	int ret;
+
+	while (tries-- > 0) {
+		ret = regmap_read(mma7455->regmap, MMA7455_REG_STATUS, &reg);
+		if (ret)
+			return ret;
+
+		if (reg & MMA7455_STATUS_DRDY)
+			return 0;
+
+		msleep(20);
+	}
+
+	dev_warn(dev, "data not ready\n");
+
+	return -EIO;
+}
+
+static irqreturn_t mma7455_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct mma7455_data *mma7455 = iio_priv(indio_dev);
+	int ret;
+
+	ret = mma7455_drdy(mma7455);
+	if (ret)
+		goto done;
+
+	ret = regmap_bulk_read(mma7455->regmap, MMA7455_REG_XOUTL,
+			       mma7455->scan.channels,
+			       sizeof(mma7455->scan.channels));
+	if (ret)
+		goto done;
+
+	iio_push_to_buffers_with_timestamp(indio_dev, &mma7455->scan,
+					   iio_get_time_ns(indio_dev));
+
+done:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int mma7455_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct mma7455_data *mma7455 = iio_priv(indio_dev);
+	unsigned int reg;
+	__le16 data;
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (iio_buffer_enabled(indio_dev))
+			return -EBUSY;
+
+		ret = mma7455_drdy(mma7455);
+		if (ret)
+			return ret;
+
+		ret = regmap_bulk_read(mma7455->regmap, chan->address, &data,
+				       sizeof(data));
+		if (ret)
+			return ret;
+
+		*val = sign_extend32(le16_to_cpu(data), 9);
+
+		return IIO_VAL_INT;
+
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = MMA7455_10BIT_SCALE;
+
+		return IIO_VAL_INT_PLUS_MICRO;
+
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		ret = regmap_read(mma7455->regmap, MMA7455_REG_CTL1, &reg);
+		if (ret)
+			return ret;
+
+		if (reg & MMA7455_CTL1_DFBW_MASK)
+			*val = 250;
+		else
+			*val = 125;
+
+		return IIO_VAL_INT;
+	}
+
+	return -EINVAL;
+}
+
+static int mma7455_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	struct mma7455_data *mma7455 = iio_priv(indio_dev);
+	int i;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		if (val == 250 && val2 == 0)
+			i = MMA7455_CTL1_DFBW_125HZ;
+		else if (val == 125 && val2 == 0)
+			i = MMA7455_CTL1_DFBW_62_5HZ;
+		else
+			return -EINVAL;
+
+		return regmap_update_bits(mma7455->regmap, MMA7455_REG_CTL1,
+					  MMA7455_CTL1_DFBW_MASK, i);
+
+	case IIO_CHAN_INFO_SCALE:
+		/* In 10-bit mode there is only one scale available */
+		if (val == 0 && val2 == MMA7455_10BIT_SCALE)
+			return 0;
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static IIO_CONST_ATTR(sampling_frequency_available, "125 250");
+
+static struct attribute *mma7455_attributes[] = {
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group mma7455_group = {
+	.attrs = mma7455_attributes,
+};
+
+static const struct iio_info mma7455_info = {
+	.attrs = &mma7455_group,
+	.read_raw = mma7455_read_raw,
+	.write_raw = mma7455_write_raw,
+};
+
+#define MMA7455_CHANNEL(axis, idx) { \
+	.type = IIO_ACCEL, \
+	.modified = 1, \
+	.address = MMA7455_REG_##axis##OUTL,\
+	.channel2 = IIO_MOD_##axis, \
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
+				    BIT(IIO_CHAN_INFO_SCALE), \
+	.scan_index = idx, \
+	.scan_type = { \
+		.sign = 's', \
+		.realbits = 10, \
+		.storagebits = 16, \
+		.endianness = IIO_LE, \
+	}, \
+}
+
+static const struct iio_chan_spec mma7455_channels[] = {
+	MMA7455_CHANNEL(X, 0),
+	MMA7455_CHANNEL(Y, 1),
+	MMA7455_CHANNEL(Z, 2),
+	IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const unsigned long mma7455_scan_masks[] = {0x7, 0};
+
+const struct regmap_config mma7455_core_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = MMA7455_REG_TW,
+};
+EXPORT_SYMBOL_GPL(mma7455_core_regmap);
+
+int mma7455_core_probe(struct device *dev, struct regmap *regmap,
+		       const char *name)
+{
+	struct mma7455_data *mma7455;
+	struct iio_dev *indio_dev;
+	unsigned int reg;
+	int ret;
+
+	ret = regmap_read(regmap, MMA7455_REG_WHOAMI, &reg);
+	if (ret) {
+		dev_err(dev, "unable to read reg\n");
+		return ret;
+	}
+
+	if (reg != MMA7455_WHOAMI_ID) {
+		dev_err(dev, "device id mismatch\n");
+		return -ENODEV;
+	}
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*mma7455));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	dev_set_drvdata(dev, indio_dev);
+	mma7455 = iio_priv(indio_dev);
+	mma7455->regmap = regmap;
+
+	indio_dev->info = &mma7455_info;
+	indio_dev->name = name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = mma7455_channels;
+	indio_dev->num_channels = ARRAY_SIZE(mma7455_channels);
+	indio_dev->available_scan_masks = mma7455_scan_masks;
+
+	regmap_write(mma7455->regmap, MMA7455_REG_MCTL,
+		     MMA7455_MCTL_MODE_MEASURE);
+
+	ret = iio_triggered_buffer_setup(indio_dev, NULL,
+					 mma7455_trigger_handler, NULL);
+	if (ret) {
+		dev_err(dev, "unable to setup triggered buffer\n");
+		return ret;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		dev_err(dev, "unable to register device\n");
+		iio_triggered_buffer_cleanup(indio_dev);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mma7455_core_probe);
+
+int mma7455_core_remove(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct mma7455_data *mma7455 = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+	iio_triggered_buffer_cleanup(indio_dev);
+
+	regmap_write(mma7455->regmap, MMA7455_REG_MCTL,
+		     MMA7455_MCTL_MODE_STANDBY);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mma7455_core_remove);
+
+MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>");
+MODULE_DESCRIPTION("Freescale MMA7455L core accelerometer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/mma7455_i2c.c b/drivers/iio/accel/mma7455_i2c.c
new file mode 100644
index 000000000..cddeaa9e2
--- /dev/null
+++ b/drivers/iio/accel/mma7455_i2c.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * IIO accel I2C driver for Freescale MMA7455L 3-axis 10-bit accelerometer
+ * Copyright 2015 Joachim Eastwood <manabian@gmail.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "mma7455.h"
+
+static int mma7455_i2c_probe(struct i2c_client *i2c,
+			     const struct i2c_device_id *id)
+{
+	struct regmap *regmap;
+	const char *name = NULL;
+
+	regmap = devm_regmap_init_i2c(i2c, &mma7455_core_regmap);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	if (id)
+		name = id->name;
+
+	return mma7455_core_probe(&i2c->dev, regmap, name);
+}
+
+static int mma7455_i2c_remove(struct i2c_client *i2c)
+{
+	return mma7455_core_remove(&i2c->dev);
+}
+
+static const struct i2c_device_id mma7455_i2c_ids[] = {
+	{ "mma7455", 0 },
+	{ "mma7456", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, mma7455_i2c_ids);
+
+static const struct of_device_id mma7455_of_match[] = {
+	{ .compatible = "fsl,mma7455" },
+	{ .compatible = "fsl,mma7456" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, mma7455_of_match);
+
+static struct i2c_driver mma7455_i2c_driver = {
+	.probe = mma7455_i2c_probe,
+	.remove = mma7455_i2c_remove,
+	.id_table = mma7455_i2c_ids,
+	.driver = {
+		.name	= "mma7455-i2c",
+		.of_match_table = mma7455_of_match,
+	},
+};
+module_i2c_driver(mma7455_i2c_driver);
+
+MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>");
+MODULE_DESCRIPTION("Freescale MMA7455L I2C accelerometer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/mma7455_spi.c b/drivers/iio/accel/mma7455_spi.c
new file mode 100644
index 000000000..eb82cdfa8
--- /dev/null
+++ b/drivers/iio/accel/mma7455_spi.c
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * IIO accel SPI driver for Freescale MMA7455L 3-axis 10-bit accelerometer
+ * Copyright 2015 Joachim Eastwood <manabian@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include "mma7455.h"
+
+static int mma7455_spi_probe(struct spi_device *spi)
+{
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	struct regmap *regmap;
+
+	regmap = devm_regmap_init_spi(spi, &mma7455_core_regmap);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return mma7455_core_probe(&spi->dev, regmap, id->name);
+}
+
+static int mma7455_spi_remove(struct spi_device *spi)
+{
+	return mma7455_core_remove(&spi->dev);
+}
+
+static const struct spi_device_id mma7455_spi_ids[] = {
+	{ "mma7455", 0 },
+	{ "mma7456", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, mma7455_spi_ids);
+
+static struct spi_driver mma7455_spi_driver = {
+	.probe = mma7455_spi_probe,
+	.remove = mma7455_spi_remove,
+	.id_table = mma7455_spi_ids,
+	.driver = {
+		.name = "mma7455-spi",
+	},
+};
+module_spi_driver(mma7455_spi_driver);
+
+MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>");
+MODULE_DESCRIPTION("Freescale MMA7455L SPI accelerometer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/mma7660.c b/drivers/iio/accel/mma7660.c
new file mode 100644
index 000000000..b3c9136d5
--- /dev/null
+++ b/drivers/iio/accel/mma7660.c
@@ -0,0 +1,280 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**
+ * Freescale MMA7660FC 3-Axis Accelerometer
+ *
+ * Copyright (c) 2016, Intel Corporation.
+ *
+ * IIO driver for Freescale MMA7660FC; 7-bit I2C address: 0x4c.
+ */
+
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define MMA7660_DRIVER_NAME	"mma7660"
+
+#define MMA7660_REG_XOUT	0x00
+#define MMA7660_REG_YOUT	0x01
+#define MMA7660_REG_ZOUT	0x02
+#define MMA7660_REG_OUT_BIT_ALERT	BIT(6)
+
+#define MMA7660_REG_MODE	0x07
+#define MMA7660_REG_MODE_BIT_MODE	BIT(0)
+#define MMA7660_REG_MODE_BIT_TON	BIT(2)
+
+#define MMA7660_I2C_READ_RETRIES	5
+
+/*
+ * The accelerometer has one measurement range:
+ *
+ * -1.5g - +1.5g (6-bit, signed)
+ *
+ * scale = (1.5 + 1.5) * 9.81 / (2^6 - 1)	= 0.467142857
+ */
+
+#define MMA7660_SCALE_AVAIL	"0.467142857"
+
+static const int mma7660_nscale = 467142857;
+
+#define MMA7660_CHANNEL(reg, axis) {	\
+	.type = IIO_ACCEL,	\
+	.address = reg,	\
+	.modified = 1,	\
+	.channel2 = IIO_MOD_##axis,	\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+}
+
+static const struct iio_chan_spec mma7660_channels[] = {
+	MMA7660_CHANNEL(MMA7660_REG_XOUT, X),
+	MMA7660_CHANNEL(MMA7660_REG_YOUT, Y),
+	MMA7660_CHANNEL(MMA7660_REG_ZOUT, Z),
+};
+
+enum mma7660_mode {
+	MMA7660_MODE_STANDBY,
+	MMA7660_MODE_ACTIVE
+};
+
+struct mma7660_data {
+	struct i2c_client *client;
+	struct mutex lock;
+	enum mma7660_mode mode;
+};
+
+static IIO_CONST_ATTR(in_accel_scale_available, MMA7660_SCALE_AVAIL);
+
+static struct attribute *mma7660_attributes[] = {
+	&iio_const_attr_in_accel_scale_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group mma7660_attribute_group = {
+	.attrs = mma7660_attributes
+};
+
+static int mma7660_set_mode(struct mma7660_data *data,
+				enum mma7660_mode mode)
+{
+	int ret;
+	struct i2c_client *client = data->client;
+
+	if (mode == data->mode)
+		return 0;
+
+	ret = i2c_smbus_read_byte_data(client, MMA7660_REG_MODE);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to read sensor mode\n");
+		return ret;
+	}
+
+	if (mode == MMA7660_MODE_ACTIVE) {
+		ret &= ~MMA7660_REG_MODE_BIT_TON;
+		ret |= MMA7660_REG_MODE_BIT_MODE;
+	} else {
+		ret &= ~MMA7660_REG_MODE_BIT_TON;
+		ret &= ~MMA7660_REG_MODE_BIT_MODE;
+	}
+
+	ret = i2c_smbus_write_byte_data(client, MMA7660_REG_MODE, ret);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to change sensor mode\n");
+		return ret;
+	}
+
+	data->mode = mode;
+
+	return ret;
+}
+
+static int mma7660_read_accel(struct mma7660_data *data, u8 address)
+{
+	int ret, retries = MMA7660_I2C_READ_RETRIES;
+	struct i2c_client *client = data->client;
+
+	/*
+	 * Read data. If the Alert bit is set, the register was read at
+	 * the same time as the device was attempting to update the content.
+	 * The solution is to read the register again. Do this only
+	 * MMA7660_I2C_READ_RETRIES times to avoid spending too much time
+	 * in the kernel.
+	 */
+	do {
+		ret = i2c_smbus_read_byte_data(client, address);
+		if (ret < 0) {
+			dev_err(&client->dev, "register read failed\n");
+			return ret;
+		}
+	} while (retries-- > 0 && ret & MMA7660_REG_OUT_BIT_ALERT);
+
+	if (ret & MMA7660_REG_OUT_BIT_ALERT) {
+		dev_err(&client->dev, "all register read retries failed\n");
+		return -ETIMEDOUT;
+	}
+
+	return ret;
+}
+
+static int mma7660_read_raw(struct iio_dev *indio_dev,
+				struct iio_chan_spec const *chan,
+				int *val, int *val2, long mask)
+{
+	struct mma7660_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		mutex_lock(&data->lock);
+		ret = mma7660_read_accel(data, chan->address);
+		mutex_unlock(&data->lock);
+		if (ret < 0)
+			return ret;
+		*val = sign_extend32(ret, 5);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = mma7660_nscale;
+		return IIO_VAL_INT_PLUS_NANO;
+	default:
+		return -EINVAL;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info mma7660_info = {
+	.read_raw		= mma7660_read_raw,
+	.attrs			= &mma7660_attribute_group,
+};
+
+static int mma7660_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct mma7660_data *data;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev) {
+		dev_err(&client->dev, "iio allocation failed!\n");
+		return -ENOMEM;
+	}
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	i2c_set_clientdata(client, indio_dev);
+	mutex_init(&data->lock);
+	data->mode = MMA7660_MODE_STANDBY;
+
+	indio_dev->info = &mma7660_info;
+	indio_dev->name = MMA7660_DRIVER_NAME;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = mma7660_channels;
+	indio_dev->num_channels = ARRAY_SIZE(mma7660_channels);
+
+	ret = mma7660_set_mode(data, MMA7660_MODE_ACTIVE);
+	if (ret < 0)
+		return ret;
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "device_register failed\n");
+		mma7660_set_mode(data, MMA7660_MODE_STANDBY);
+	}
+
+	return ret;
+}
+
+static int mma7660_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+	iio_device_unregister(indio_dev);
+
+	return mma7660_set_mode(iio_priv(indio_dev), MMA7660_MODE_STANDBY);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int mma7660_suspend(struct device *dev)
+{
+	struct mma7660_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return mma7660_set_mode(data, MMA7660_MODE_STANDBY);
+}
+
+static int mma7660_resume(struct device *dev)
+{
+	struct mma7660_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return mma7660_set_mode(data, MMA7660_MODE_ACTIVE);
+}
+
+static SIMPLE_DEV_PM_OPS(mma7660_pm_ops, mma7660_suspend, mma7660_resume);
+
+#define MMA7660_PM_OPS (&mma7660_pm_ops)
+#else
+#define MMA7660_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id mma7660_i2c_id[] = {
+	{"mma7660", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, mma7660_i2c_id);
+
+static const struct of_device_id mma7660_of_match[] = {
+	{ .compatible = "fsl,mma7660" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, mma7660_of_match);
+
+static const struct acpi_device_id mma7660_acpi_id[] = {
+	{"MMA7660", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(acpi, mma7660_acpi_id);
+
+static struct i2c_driver mma7660_driver = {
+	.driver = {
+		.name = "mma7660",
+		.pm = MMA7660_PM_OPS,
+		.of_match_table = mma7660_of_match,
+		.acpi_match_table = ACPI_PTR(mma7660_acpi_id),
+	},
+	.probe		= mma7660_probe,
+	.remove		= mma7660_remove,
+	.id_table	= mma7660_i2c_id,
+};
+
+module_i2c_driver(mma7660_driver);
+
+MODULE_AUTHOR("Constantin Musca <constantin.musca@intel.com>");
+MODULE_DESCRIPTION("Freescale MMA7660FC 3-Axis Accelerometer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
new file mode 100644
index 000000000..b12e80464
--- /dev/null
+++ b/drivers/iio/accel/mma8452.c
@@ -0,0 +1,1841 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mma8452.c - Support for following Freescale / NXP 3-axis accelerometers:
+ *
+ * device name	digital output	7-bit I2C slave address (pin selectable)
+ * ---------------------------------------------------------------------
+ * MMA8451Q	14 bit		0x1c / 0x1d
+ * MMA8452Q	12 bit		0x1c / 0x1d
+ * MMA8453Q	10 bit		0x1c / 0x1d
+ * MMA8652FC	12 bit		0x1d
+ * MMA8653FC	10 bit		0x1d
+ * FXLS8471Q	14 bit		0x1e / 0x1d / 0x1c / 0x1f
+ *
+ * Copyright 2015 Martin Kepplinger <martink@posteo.de>
+ * Copyright 2014 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ *
+ * TODO: orientation events
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/events.h>
+#include <linux/delay.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+
+#define MMA8452_STATUS				0x00
+#define  MMA8452_STATUS_DRDY			(BIT(2) | BIT(1) | BIT(0))
+#define MMA8452_OUT_X				0x01 /* MSB first */
+#define MMA8452_OUT_Y				0x03
+#define MMA8452_OUT_Z				0x05
+#define MMA8452_INT_SRC				0x0c
+#define MMA8452_WHO_AM_I			0x0d
+#define MMA8452_DATA_CFG			0x0e
+#define  MMA8452_DATA_CFG_FS_MASK		GENMASK(1, 0)
+#define  MMA8452_DATA_CFG_FS_2G			0
+#define  MMA8452_DATA_CFG_FS_4G			1
+#define  MMA8452_DATA_CFG_FS_8G			2
+#define  MMA8452_DATA_CFG_HPF_MASK		BIT(4)
+#define MMA8452_HP_FILTER_CUTOFF		0x0f
+#define  MMA8452_HP_FILTER_CUTOFF_SEL_MASK	GENMASK(1, 0)
+#define MMA8452_FF_MT_CFG			0x15
+#define  MMA8452_FF_MT_CFG_OAE			BIT(6)
+#define  MMA8452_FF_MT_CFG_ELE			BIT(7)
+#define MMA8452_FF_MT_SRC			0x16
+#define  MMA8452_FF_MT_SRC_XHE			BIT(1)
+#define  MMA8452_FF_MT_SRC_YHE			BIT(3)
+#define  MMA8452_FF_MT_SRC_ZHE			BIT(5)
+#define MMA8452_FF_MT_THS			0x17
+#define  MMA8452_FF_MT_THS_MASK			0x7f
+#define MMA8452_FF_MT_COUNT			0x18
+#define MMA8452_FF_MT_CHAN_SHIFT	3
+#define MMA8452_TRANSIENT_CFG			0x1d
+#define  MMA8452_TRANSIENT_CFG_CHAN(chan)	BIT(chan + 1)
+#define  MMA8452_TRANSIENT_CFG_HPF_BYP		BIT(0)
+#define  MMA8452_TRANSIENT_CFG_ELE		BIT(4)
+#define MMA8452_TRANSIENT_SRC			0x1e
+#define  MMA8452_TRANSIENT_SRC_XTRANSE		BIT(1)
+#define  MMA8452_TRANSIENT_SRC_YTRANSE		BIT(3)
+#define  MMA8452_TRANSIENT_SRC_ZTRANSE		BIT(5)
+#define MMA8452_TRANSIENT_THS			0x1f
+#define  MMA8452_TRANSIENT_THS_MASK		GENMASK(6, 0)
+#define MMA8452_TRANSIENT_COUNT			0x20
+#define MMA8452_TRANSIENT_CHAN_SHIFT 1
+#define MMA8452_CTRL_REG1			0x2a
+#define  MMA8452_CTRL_ACTIVE			BIT(0)
+#define  MMA8452_CTRL_DR_MASK			GENMASK(5, 3)
+#define  MMA8452_CTRL_DR_SHIFT			3
+#define  MMA8452_CTRL_DR_DEFAULT		0x4 /* 50 Hz sample frequency */
+#define MMA8452_CTRL_REG2			0x2b
+#define  MMA8452_CTRL_REG2_RST			BIT(6)
+#define  MMA8452_CTRL_REG2_MODS_SHIFT		3
+#define  MMA8452_CTRL_REG2_MODS_MASK		0x1b
+#define MMA8452_CTRL_REG4			0x2d
+#define MMA8452_CTRL_REG5			0x2e
+#define MMA8452_OFF_X				0x2f
+#define MMA8452_OFF_Y				0x30
+#define MMA8452_OFF_Z				0x31
+
+#define MMA8452_MAX_REG				0x31
+
+#define  MMA8452_INT_DRDY			BIT(0)
+#define  MMA8452_INT_FF_MT			BIT(2)
+#define  MMA8452_INT_TRANS			BIT(5)
+
+#define MMA8451_DEVICE_ID			0x1a
+#define MMA8452_DEVICE_ID			0x2a
+#define MMA8453_DEVICE_ID			0x3a
+#define MMA8652_DEVICE_ID			0x4a
+#define MMA8653_DEVICE_ID			0x5a
+#define FXLS8471_DEVICE_ID			0x6a
+
+#define MMA8452_AUTO_SUSPEND_DELAY_MS		2000
+
+struct mma8452_data {
+	struct i2c_client *client;
+	struct mutex lock;
+	u8 ctrl_reg1;
+	u8 data_cfg;
+	const struct mma_chip_info *chip_info;
+	int sleep_val;
+	struct regulator *vdd_reg;
+	struct regulator *vddio_reg;
+
+	/* Ensure correct alignment of time stamp when present */
+	struct {
+		__be16 channels[3];
+		s64 ts __aligned(8);
+	} buffer;
+};
+
+ /**
+  * struct mma8452_event_regs - chip specific data related to events
+  * @ev_cfg:			event config register address
+  * @ev_cfg_ele:			latch bit in event config register
+  * @ev_cfg_chan_shift:		number of the bit to enable events in X
+  *				direction; in event config register
+  * @ev_src:			event source register address
+  * @ev_ths:			event threshold register address
+  * @ev_ths_mask:		mask for the threshold value
+  * @ev_count:			event count (period) register address
+  *
+  * Since not all chips supported by the driver support comparing high pass
+  * filtered data for events (interrupts), different interrupt sources are
+  * used for different chips and the relevant registers are included here.
+  */
+struct mma8452_event_regs {
+		u8 ev_cfg;
+		u8 ev_cfg_ele;
+		u8 ev_cfg_chan_shift;
+		u8 ev_src;
+		u8 ev_ths;
+		u8 ev_ths_mask;
+		u8 ev_count;
+};
+
+static const struct mma8452_event_regs ff_mt_ev_regs = {
+		.ev_cfg = MMA8452_FF_MT_CFG,
+		.ev_cfg_ele = MMA8452_FF_MT_CFG_ELE,
+		.ev_cfg_chan_shift = MMA8452_FF_MT_CHAN_SHIFT,
+		.ev_src = MMA8452_FF_MT_SRC,
+		.ev_ths = MMA8452_FF_MT_THS,
+		.ev_ths_mask = MMA8452_FF_MT_THS_MASK,
+		.ev_count = MMA8452_FF_MT_COUNT
+};
+
+static const struct mma8452_event_regs trans_ev_regs = {
+		.ev_cfg = MMA8452_TRANSIENT_CFG,
+		.ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE,
+		.ev_cfg_chan_shift = MMA8452_TRANSIENT_CHAN_SHIFT,
+		.ev_src = MMA8452_TRANSIENT_SRC,
+		.ev_ths = MMA8452_TRANSIENT_THS,
+		.ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
+		.ev_count = MMA8452_TRANSIENT_COUNT,
+};
+
+/**
+ * struct mma_chip_info - chip specific data
+ * @chip_id:			WHO_AM_I register's value
+ * @channels:			struct iio_chan_spec matching the device's
+ *				capabilities
+ * @num_channels:		number of channels
+ * @mma_scales:			scale factors for converting register values
+ *				to m/s^2; 3 modes: 2g, 4g, 8g; 2 integers
+ *				per mode: m/s^2 and micro m/s^2
+ * @all_events:			all events supported by this chip
+ * @enabled_events:		event flags enabled and handled by this driver
+ */
+struct mma_chip_info {
+	const char *name;
+	u8 chip_id;
+	const struct iio_chan_spec *channels;
+	int num_channels;
+	const int mma_scales[3][2];
+	int all_events;
+	int enabled_events;
+};
+
+enum {
+	idx_x,
+	idx_y,
+	idx_z,
+	idx_ts,
+};
+
+static int mma8452_drdy(struct mma8452_data *data)
+{
+	int tries = 150;
+
+	while (tries-- > 0) {
+		int ret = i2c_smbus_read_byte_data(data->client,
+			MMA8452_STATUS);
+		if (ret < 0)
+			return ret;
+		if ((ret & MMA8452_STATUS_DRDY) == MMA8452_STATUS_DRDY)
+			return 0;
+
+		if (data->sleep_val <= 20)
+			usleep_range(data->sleep_val * 250,
+				     data->sleep_val * 500);
+		else
+			msleep(20);
+	}
+
+	dev_err(&data->client->dev, "data not ready\n");
+
+	return -EIO;
+}
+
+static int mma8452_set_runtime_pm_state(struct i2c_client *client, bool on)
+{
+#ifdef CONFIG_PM
+	int ret;
+
+	if (on) {
+		ret = pm_runtime_get_sync(&client->dev);
+	} else {
+		pm_runtime_mark_last_busy(&client->dev);
+		ret = pm_runtime_put_autosuspend(&client->dev);
+	}
+
+	if (ret < 0) {
+		dev_err(&client->dev,
+			"failed to change power state to %d\n", on);
+		if (on)
+			pm_runtime_put_noidle(&client->dev);
+
+		return ret;
+	}
+#endif
+
+	return 0;
+}
+
+static int mma8452_read(struct mma8452_data *data, __be16 buf[3])
+{
+	int ret = mma8452_drdy(data);
+
+	if (ret < 0)
+		return ret;
+
+	ret = mma8452_set_runtime_pm_state(data->client, true);
+	if (ret)
+		return ret;
+
+	ret = i2c_smbus_read_i2c_block_data(data->client, MMA8452_OUT_X,
+					    3 * sizeof(__be16), (u8 *)buf);
+
+	ret = mma8452_set_runtime_pm_state(data->client, false);
+
+	return ret;
+}
+
+static ssize_t mma8452_show_int_plus_micros(char *buf, const int (*vals)[2],
+					    int n)
+{
+	size_t len = 0;
+
+	while (n-- > 0)
+		len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ",
+				 vals[n][0], vals[n][1]);
+
+	/* replace trailing space by newline */
+	buf[len - 1] = '\n';
+
+	return len;
+}
+
+static int mma8452_get_int_plus_micros_index(const int (*vals)[2], int n,
+					     int val, int val2)
+{
+	while (n-- > 0)
+		if (val == vals[n][0] && val2 == vals[n][1])
+			return n;
+
+	return -EINVAL;
+}
+
+static unsigned int mma8452_get_odr_index(struct mma8452_data *data)
+{
+	return (data->ctrl_reg1 & MMA8452_CTRL_DR_MASK) >>
+			MMA8452_CTRL_DR_SHIFT;
+}
+
+static const int mma8452_samp_freq[8][2] = {
+	{800, 0}, {400, 0}, {200, 0}, {100, 0}, {50, 0}, {12, 500000},
+	{6, 250000}, {1, 560000}
+};
+
+/* Datasheet table: step time "Relationship with the ODR" (sample frequency) */
+static const unsigned int mma8452_time_step_us[4][8] = {
+	{ 1250, 2500, 5000, 10000, 20000, 20000, 20000, 20000 },  /* normal */
+	{ 1250, 2500, 5000, 10000, 20000, 80000, 80000, 80000 },  /* l p l n */
+	{ 1250, 2500, 2500, 2500, 2500, 2500, 2500, 2500 },	  /* high res*/
+	{ 1250, 2500, 5000, 10000, 20000, 80000, 160000, 160000 } /* l p */
+};
+
+/* Datasheet table "High-Pass Filter Cutoff Options" */
+static const int mma8452_hp_filter_cutoff[4][8][4][2] = {
+	{ /* normal */
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },		/* 800 Hz sample */
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },		/* 400 Hz sample */
+	{ {8, 0}, {4, 0}, {2, 0}, {1, 0} },		/* 200 Hz sample */
+	{ {4, 0}, {2, 0}, {1, 0}, {0, 500000} },	/* 100 Hz sample */
+	{ {2, 0}, {1, 0}, {0, 500000}, {0, 250000} },	/* 50 Hz sample */
+	{ {2, 0}, {1, 0}, {0, 500000}, {0, 250000} },	/* 12.5 Hz sample */
+	{ {2, 0}, {1, 0}, {0, 500000}, {0, 250000} },	/* 6.25 Hz sample */
+	{ {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }	/* 1.56 Hz sample */
+	},
+	{ /* low noise low power */
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },
+	{ {8, 0}, {4, 0}, {2, 0}, {1, 0} },
+	{ {4, 0}, {2, 0}, {1, 0}, {0, 500000} },
+	{ {2, 0}, {1, 0}, {0, 500000}, {0, 250000} },
+	{ {0, 500000}, {0, 250000}, {0, 125000}, {0, 063000} },
+	{ {0, 500000}, {0, 250000}, {0, 125000}, {0, 063000} },
+	{ {0, 500000}, {0, 250000}, {0, 125000}, {0, 063000} }
+	},
+	{ /* high resolution */
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} }
+	},
+	{ /* low power */
+	{ {16, 0}, {8, 0}, {4, 0}, {2, 0} },
+	{ {8, 0}, {4, 0}, {2, 0}, {1, 0} },
+	{ {4, 0}, {2, 0}, {1, 0}, {0, 500000} },
+	{ {2, 0}, {1, 0}, {0, 500000}, {0, 250000} },
+	{ {1, 0}, {0, 500000}, {0, 250000}, {0, 125000} },
+	{ {0, 250000}, {0, 125000}, {0, 063000}, {0, 031000} },
+	{ {0, 250000}, {0, 125000}, {0, 063000}, {0, 031000} },
+	{ {0, 250000}, {0, 125000}, {0, 063000}, {0, 031000} }
+	}
+};
+
+/* Datasheet table "MODS Oversampling modes averaging values at each ODR" */
+static const u16 mma8452_os_ratio[4][8] = {
+	/* 800 Hz, 400 Hz, ... , 1.56 Hz */
+	{ 2, 4, 4, 4, 4, 16, 32, 128 },		/* normal */
+	{ 2, 4, 4, 4, 4, 4, 8, 32 },		/* low power low noise */
+	{ 2, 4, 8, 16, 32, 128, 256, 1024 },	/* high resolution */
+	{ 2, 2, 2, 2, 2, 2, 4, 16 }		/* low power */
+};
+
+static int mma8452_get_power_mode(struct mma8452_data *data)
+{
+	int reg;
+
+	reg = i2c_smbus_read_byte_data(data->client,
+				       MMA8452_CTRL_REG2);
+	if (reg < 0)
+		return reg;
+
+	return ((reg & MMA8452_CTRL_REG2_MODS_MASK) >>
+		MMA8452_CTRL_REG2_MODS_SHIFT);
+}
+
+static ssize_t mma8452_show_samp_freq_avail(struct device *dev,
+					    struct device_attribute *attr,
+					    char *buf)
+{
+	return mma8452_show_int_plus_micros(buf, mma8452_samp_freq,
+					    ARRAY_SIZE(mma8452_samp_freq));
+}
+
+static ssize_t mma8452_show_scale_avail(struct device *dev,
+					struct device_attribute *attr,
+					char *buf)
+{
+	struct mma8452_data *data = iio_priv(i2c_get_clientdata(
+					     to_i2c_client(dev)));
+
+	return mma8452_show_int_plus_micros(buf, data->chip_info->mma_scales,
+		ARRAY_SIZE(data->chip_info->mma_scales));
+}
+
+static ssize_t mma8452_show_hp_cutoff_avail(struct device *dev,
+					    struct device_attribute *attr,
+					    char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int i, j;
+
+	i = mma8452_get_odr_index(data);
+	j = mma8452_get_power_mode(data);
+	if (j < 0)
+		return j;
+
+	return mma8452_show_int_plus_micros(buf, mma8452_hp_filter_cutoff[j][i],
+		ARRAY_SIZE(mma8452_hp_filter_cutoff[0][0]));
+}
+
+static ssize_t mma8452_show_os_ratio_avail(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int i = mma8452_get_odr_index(data);
+	int j;
+	u16 val = 0;
+	size_t len = 0;
+
+	for (j = 0; j < ARRAY_SIZE(mma8452_os_ratio); j++) {
+		if (val == mma8452_os_ratio[j][i])
+			continue;
+
+		val = mma8452_os_ratio[j][i];
+
+		len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", val);
+	}
+	buf[len - 1] = '\n';
+
+	return len;
+}
+
+static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(mma8452_show_samp_freq_avail);
+static IIO_DEVICE_ATTR(in_accel_scale_available, 0444,
+		       mma8452_show_scale_avail, NULL, 0);
+static IIO_DEVICE_ATTR(in_accel_filter_high_pass_3db_frequency_available,
+		       0444, mma8452_show_hp_cutoff_avail, NULL, 0);
+static IIO_DEVICE_ATTR(in_accel_oversampling_ratio_available, 0444,
+		       mma8452_show_os_ratio_avail, NULL, 0);
+
+static int mma8452_get_samp_freq_index(struct mma8452_data *data,
+				       int val, int val2)
+{
+	return mma8452_get_int_plus_micros_index(mma8452_samp_freq,
+						 ARRAY_SIZE(mma8452_samp_freq),
+						 val, val2);
+}
+
+static int mma8452_get_scale_index(struct mma8452_data *data, int val, int val2)
+{
+	return mma8452_get_int_plus_micros_index(data->chip_info->mma_scales,
+			ARRAY_SIZE(data->chip_info->mma_scales), val, val2);
+}
+
+static int mma8452_get_hp_filter_index(struct mma8452_data *data,
+				       int val, int val2)
+{
+	int i, j;
+
+	i = mma8452_get_odr_index(data);
+	j = mma8452_get_power_mode(data);
+	if (j < 0)
+		return j;
+
+	return mma8452_get_int_plus_micros_index(mma8452_hp_filter_cutoff[j][i],
+		ARRAY_SIZE(mma8452_hp_filter_cutoff[0][0]), val, val2);
+}
+
+static int mma8452_read_hp_filter(struct mma8452_data *data, int *hz, int *uHz)
+{
+	int j, i, ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, MMA8452_HP_FILTER_CUTOFF);
+	if (ret < 0)
+		return ret;
+
+	i = mma8452_get_odr_index(data);
+	j = mma8452_get_power_mode(data);
+	if (j < 0)
+		return j;
+
+	ret &= MMA8452_HP_FILTER_CUTOFF_SEL_MASK;
+	*hz = mma8452_hp_filter_cutoff[j][i][ret][0];
+	*uHz = mma8452_hp_filter_cutoff[j][i][ret][1];
+
+	return 0;
+}
+
+static int mma8452_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct mma8452_data *data = iio_priv(indio_dev);
+	__be16 buffer[3];
+	int i, ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = iio_device_claim_direct_mode(indio_dev);
+		if (ret)
+			return ret;
+
+		mutex_lock(&data->lock);
+		ret = mma8452_read(data, buffer);
+		mutex_unlock(&data->lock);
+		iio_device_release_direct_mode(indio_dev);
+		if (ret < 0)
+			return ret;
+
+		*val = sign_extend32(be16_to_cpu(
+			buffer[chan->scan_index]) >> chan->scan_type.shift,
+			chan->scan_type.realbits - 1);
+
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		i = data->data_cfg & MMA8452_DATA_CFG_FS_MASK;
+		*val = data->chip_info->mma_scales[i][0];
+		*val2 = data->chip_info->mma_scales[i][1];
+
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		i = mma8452_get_odr_index(data);
+		*val = mma8452_samp_freq[i][0];
+		*val2 = mma8452_samp_freq[i][1];
+
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_CALIBBIAS:
+		ret = i2c_smbus_read_byte_data(data->client,
+					       MMA8452_OFF_X +
+					       chan->scan_index);
+		if (ret < 0)
+			return ret;
+
+		*val = sign_extend32(ret, 7);
+
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY:
+		if (data->data_cfg & MMA8452_DATA_CFG_HPF_MASK) {
+			ret = mma8452_read_hp_filter(data, val, val2);
+			if (ret < 0)
+				return ret;
+		} else {
+			*val = 0;
+			*val2 = 0;
+		}
+
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
+		ret = mma8452_get_power_mode(data);
+		if (ret < 0)
+			return ret;
+
+		i = mma8452_get_odr_index(data);
+
+		*val = mma8452_os_ratio[ret][i];
+		return IIO_VAL_INT;
+	}
+
+	return -EINVAL;
+}
+
+static int mma8452_calculate_sleep(struct mma8452_data *data)
+{
+	int ret, i = mma8452_get_odr_index(data);
+
+	if (mma8452_samp_freq[i][0] > 0)
+		ret = 1000 / mma8452_samp_freq[i][0];
+	else
+		ret = 1000;
+
+	return ret == 0 ? 1 : ret;
+}
+
+static int mma8452_standby(struct mma8452_data *data)
+{
+	return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1,
+					data->ctrl_reg1 & ~MMA8452_CTRL_ACTIVE);
+}
+
+static int mma8452_active(struct mma8452_data *data)
+{
+	return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1,
+					 data->ctrl_reg1);
+}
+
+/* returns >0 if active, 0 if in standby and <0 on error */
+static int mma8452_is_active(struct mma8452_data *data)
+{
+	int reg;
+
+	reg = i2c_smbus_read_byte_data(data->client, MMA8452_CTRL_REG1);
+	if (reg < 0)
+		return reg;
+
+	return reg & MMA8452_CTRL_ACTIVE;
+}
+
+static int mma8452_change_config(struct mma8452_data *data, u8 reg, u8 val)
+{
+	int ret;
+	int is_active;
+
+	mutex_lock(&data->lock);
+
+	is_active = mma8452_is_active(data);
+	if (is_active < 0) {
+		ret = is_active;
+		goto fail;
+	}
+
+	/* config can only be changed when in standby */
+	if (is_active > 0) {
+		ret = mma8452_standby(data);
+		if (ret < 0)
+			goto fail;
+	}
+
+	ret = i2c_smbus_write_byte_data(data->client, reg, val);
+	if (ret < 0)
+		goto fail;
+
+	if (is_active > 0) {
+		ret = mma8452_active(data);
+		if (ret < 0)
+			goto fail;
+	}
+
+	ret = 0;
+fail:
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+
+static int mma8452_set_power_mode(struct mma8452_data *data, u8 mode)
+{
+	int reg;
+
+	reg = i2c_smbus_read_byte_data(data->client,
+				       MMA8452_CTRL_REG2);
+	if (reg < 0)
+		return reg;
+
+	reg &= ~MMA8452_CTRL_REG2_MODS_MASK;
+	reg |= mode << MMA8452_CTRL_REG2_MODS_SHIFT;
+
+	return mma8452_change_config(data, MMA8452_CTRL_REG2, reg);
+}
+
+/* returns >0 if in freefall mode, 0 if not or <0 if an error occurred */
+static int mma8452_freefall_mode_enabled(struct mma8452_data *data)
+{
+	int val;
+
+	val = i2c_smbus_read_byte_data(data->client, MMA8452_FF_MT_CFG);
+	if (val < 0)
+		return val;
+
+	return !(val & MMA8452_FF_MT_CFG_OAE);
+}
+
+static int mma8452_set_freefall_mode(struct mma8452_data *data, bool state)
+{
+	int val;
+
+	if ((state && mma8452_freefall_mode_enabled(data)) ||
+	    (!state && !(mma8452_freefall_mode_enabled(data))))
+		return 0;
+
+	val = i2c_smbus_read_byte_data(data->client, MMA8452_FF_MT_CFG);
+	if (val < 0)
+		return val;
+
+	if (state) {
+		val |= BIT(idx_x + MMA8452_FF_MT_CHAN_SHIFT);
+		val |= BIT(idx_y + MMA8452_FF_MT_CHAN_SHIFT);
+		val |= BIT(idx_z + MMA8452_FF_MT_CHAN_SHIFT);
+		val &= ~MMA8452_FF_MT_CFG_OAE;
+	} else {
+		val &= ~BIT(idx_x + MMA8452_FF_MT_CHAN_SHIFT);
+		val &= ~BIT(idx_y + MMA8452_FF_MT_CHAN_SHIFT);
+		val &= ~BIT(idx_z + MMA8452_FF_MT_CHAN_SHIFT);
+		val |= MMA8452_FF_MT_CFG_OAE;
+	}
+
+	return mma8452_change_config(data, MMA8452_FF_MT_CFG, val);
+}
+
+static int mma8452_set_hp_filter_frequency(struct mma8452_data *data,
+					   int val, int val2)
+{
+	int i, reg;
+
+	i = mma8452_get_hp_filter_index(data, val, val2);
+	if (i < 0)
+		return i;
+
+	reg = i2c_smbus_read_byte_data(data->client,
+				       MMA8452_HP_FILTER_CUTOFF);
+	if (reg < 0)
+		return reg;
+
+	reg &= ~MMA8452_HP_FILTER_CUTOFF_SEL_MASK;
+	reg |= i;
+
+	return mma8452_change_config(data, MMA8452_HP_FILTER_CUTOFF, reg);
+}
+
+static int mma8452_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int i, ret;
+
+	ret = iio_device_claim_direct_mode(indio_dev);
+	if (ret)
+		return ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		i = mma8452_get_samp_freq_index(data, val, val2);
+		if (i < 0) {
+			ret = i;
+			break;
+		}
+		data->ctrl_reg1 &= ~MMA8452_CTRL_DR_MASK;
+		data->ctrl_reg1 |= i << MMA8452_CTRL_DR_SHIFT;
+
+		data->sleep_val = mma8452_calculate_sleep(data);
+
+		ret = mma8452_change_config(data, MMA8452_CTRL_REG1,
+					    data->ctrl_reg1);
+		break;
+	case IIO_CHAN_INFO_SCALE:
+		i = mma8452_get_scale_index(data, val, val2);
+		if (i < 0) {
+			ret = i;
+			break;
+		}
+
+		data->data_cfg &= ~MMA8452_DATA_CFG_FS_MASK;
+		data->data_cfg |= i;
+
+		ret = mma8452_change_config(data, MMA8452_DATA_CFG,
+					    data->data_cfg);
+		break;
+	case IIO_CHAN_INFO_CALIBBIAS:
+		if (val < -128 || val > 127) {
+			ret = -EINVAL;
+			break;
+		}
+
+		ret = mma8452_change_config(data,
+					    MMA8452_OFF_X + chan->scan_index,
+					    val);
+		break;
+
+	case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY:
+		if (val == 0 && val2 == 0) {
+			data->data_cfg &= ~MMA8452_DATA_CFG_HPF_MASK;
+		} else {
+			data->data_cfg |= MMA8452_DATA_CFG_HPF_MASK;
+			ret = mma8452_set_hp_filter_frequency(data, val, val2);
+			if (ret < 0)
+				break;
+		}
+
+		ret = mma8452_change_config(data, MMA8452_DATA_CFG,
+					     data->data_cfg);
+		break;
+
+	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
+		ret = mma8452_get_odr_index(data);
+
+		for (i = 0; i < ARRAY_SIZE(mma8452_os_ratio); i++) {
+			if (mma8452_os_ratio[i][ret] == val) {
+				ret = mma8452_set_power_mode(data, i);
+				break;
+			}
+		}
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	iio_device_release_direct_mode(indio_dev);
+	return ret;
+}
+
+static int mma8452_get_event_regs(struct mma8452_data *data,
+		const struct iio_chan_spec *chan, enum iio_event_direction dir,
+		const struct mma8452_event_regs **ev_reg)
+{
+	if (!chan)
+		return -EINVAL;
+
+	switch (chan->type) {
+	case IIO_ACCEL:
+		switch (dir) {
+		case IIO_EV_DIR_RISING:
+			if ((data->chip_info->all_events
+					& MMA8452_INT_TRANS) &&
+				(data->chip_info->enabled_events
+					& MMA8452_INT_TRANS))
+				*ev_reg = &trans_ev_regs;
+			else
+				*ev_reg = &ff_mt_ev_regs;
+			return 0;
+		case IIO_EV_DIR_FALLING:
+			*ev_reg = &ff_mt_ev_regs;
+			return 0;
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma8452_read_event_value(struct iio_dev *indio_dev,
+			       const struct iio_chan_spec *chan,
+			       enum iio_event_type type,
+			       enum iio_event_direction dir,
+			       enum iio_event_info info,
+			       int *val, int *val2)
+{
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int ret, us, power_mode;
+	const struct mma8452_event_regs *ev_regs;
+
+	ret = mma8452_get_event_regs(data, chan, dir, &ev_regs);
+	if (ret)
+		return ret;
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		ret = i2c_smbus_read_byte_data(data->client, ev_regs->ev_ths);
+		if (ret < 0)
+			return ret;
+
+		*val = ret & ev_regs->ev_ths_mask;
+
+		return IIO_VAL_INT;
+
+	case IIO_EV_INFO_PERIOD:
+		ret = i2c_smbus_read_byte_data(data->client, ev_regs->ev_count);
+		if (ret < 0)
+			return ret;
+
+		power_mode = mma8452_get_power_mode(data);
+		if (power_mode < 0)
+			return power_mode;
+
+		us = ret * mma8452_time_step_us[power_mode][
+				mma8452_get_odr_index(data)];
+		*val = us / USEC_PER_SEC;
+		*val2 = us % USEC_PER_SEC;
+
+		return IIO_VAL_INT_PLUS_MICRO;
+
+	case IIO_EV_INFO_HIGH_PASS_FILTER_3DB:
+		ret = i2c_smbus_read_byte_data(data->client,
+					       MMA8452_TRANSIENT_CFG);
+		if (ret < 0)
+			return ret;
+
+		if (ret & MMA8452_TRANSIENT_CFG_HPF_BYP) {
+			*val = 0;
+			*val2 = 0;
+		} else {
+			ret = mma8452_read_hp_filter(data, val, val2);
+			if (ret < 0)
+				return ret;
+		}
+
+		return IIO_VAL_INT_PLUS_MICRO;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma8452_write_event_value(struct iio_dev *indio_dev,
+				const struct iio_chan_spec *chan,
+				enum iio_event_type type,
+				enum iio_event_direction dir,
+				enum iio_event_info info,
+				int val, int val2)
+{
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int ret, reg, steps;
+	const struct mma8452_event_regs *ev_regs;
+
+	ret = mma8452_get_event_regs(data, chan, dir, &ev_regs);
+	if (ret)
+		return ret;
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		if (val < 0 || val > ev_regs->ev_ths_mask)
+			return -EINVAL;
+
+		return mma8452_change_config(data, ev_regs->ev_ths, val);
+
+	case IIO_EV_INFO_PERIOD:
+		ret = mma8452_get_power_mode(data);
+		if (ret < 0)
+			return ret;
+
+		steps = (val * USEC_PER_SEC + val2) /
+				mma8452_time_step_us[ret][
+					mma8452_get_odr_index(data)];
+
+		if (steps < 0 || steps > 0xff)
+			return -EINVAL;
+
+		return mma8452_change_config(data, ev_regs->ev_count, steps);
+
+	case IIO_EV_INFO_HIGH_PASS_FILTER_3DB:
+		reg = i2c_smbus_read_byte_data(data->client,
+					       MMA8452_TRANSIENT_CFG);
+		if (reg < 0)
+			return reg;
+
+		if (val == 0 && val2 == 0) {
+			reg |= MMA8452_TRANSIENT_CFG_HPF_BYP;
+		} else {
+			reg &= ~MMA8452_TRANSIENT_CFG_HPF_BYP;
+			ret = mma8452_set_hp_filter_frequency(data, val, val2);
+			if (ret < 0)
+				return ret;
+		}
+
+		return mma8452_change_config(data, MMA8452_TRANSIENT_CFG, reg);
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma8452_read_event_config(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir)
+{
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int ret;
+	const struct mma8452_event_regs *ev_regs;
+
+	ret = mma8452_get_event_regs(data, chan, dir, &ev_regs);
+	if (ret)
+		return ret;
+
+	switch (dir) {
+	case IIO_EV_DIR_FALLING:
+		return mma8452_freefall_mode_enabled(data);
+	case IIO_EV_DIR_RISING:
+		ret = i2c_smbus_read_byte_data(data->client,
+				ev_regs->ev_cfg);
+		if (ret < 0)
+			return ret;
+
+		return !!(ret & BIT(chan->scan_index +
+				ev_regs->ev_cfg_chan_shift));
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma8452_write_event_config(struct iio_dev *indio_dev,
+				      const struct iio_chan_spec *chan,
+				      enum iio_event_type type,
+				      enum iio_event_direction dir,
+				      int state)
+{
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int val, ret;
+	const struct mma8452_event_regs *ev_regs;
+
+	ret = mma8452_get_event_regs(data, chan, dir, &ev_regs);
+	if (ret)
+		return ret;
+
+	ret = mma8452_set_runtime_pm_state(data->client, state);
+	if (ret)
+		return ret;
+
+	switch (dir) {
+	case IIO_EV_DIR_FALLING:
+		return mma8452_set_freefall_mode(data, state);
+	case IIO_EV_DIR_RISING:
+		val = i2c_smbus_read_byte_data(data->client, ev_regs->ev_cfg);
+		if (val < 0)
+			return val;
+
+		if (state) {
+			if (mma8452_freefall_mode_enabled(data)) {
+				val &= ~BIT(idx_x + ev_regs->ev_cfg_chan_shift);
+				val &= ~BIT(idx_y + ev_regs->ev_cfg_chan_shift);
+				val &= ~BIT(idx_z + ev_regs->ev_cfg_chan_shift);
+				val |= MMA8452_FF_MT_CFG_OAE;
+			}
+			val |= BIT(chan->scan_index +
+					ev_regs->ev_cfg_chan_shift);
+		} else {
+			if (mma8452_freefall_mode_enabled(data))
+				return 0;
+
+			val &= ~BIT(chan->scan_index +
+					ev_regs->ev_cfg_chan_shift);
+		}
+
+		val |= ev_regs->ev_cfg_ele;
+
+		return mma8452_change_config(data, ev_regs->ev_cfg, val);
+	default:
+		return -EINVAL;
+	}
+}
+
+static void mma8452_transient_interrupt(struct iio_dev *indio_dev)
+{
+	struct mma8452_data *data = iio_priv(indio_dev);
+	s64 ts = iio_get_time_ns(indio_dev);
+	int src;
+
+	src = i2c_smbus_read_byte_data(data->client, MMA8452_TRANSIENT_SRC);
+	if (src < 0)
+		return;
+
+	if (src & MMA8452_TRANSIENT_SRC_XTRANSE)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X,
+						  IIO_EV_TYPE_MAG,
+						  IIO_EV_DIR_RISING),
+			       ts);
+
+	if (src & MMA8452_TRANSIENT_SRC_YTRANSE)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Y,
+						  IIO_EV_TYPE_MAG,
+						  IIO_EV_DIR_RISING),
+			       ts);
+
+	if (src & MMA8452_TRANSIENT_SRC_ZTRANSE)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Z,
+						  IIO_EV_TYPE_MAG,
+						  IIO_EV_DIR_RISING),
+			       ts);
+}
+
+static irqreturn_t mma8452_interrupt(int irq, void *p)
+{
+	struct iio_dev *indio_dev = p;
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int ret = IRQ_NONE;
+	int src;
+
+	src = i2c_smbus_read_byte_data(data->client, MMA8452_INT_SRC);
+	if (src < 0)
+		return IRQ_NONE;
+
+	if (!(src & (data->chip_info->enabled_events | MMA8452_INT_DRDY)))
+		return IRQ_NONE;
+
+	if (src & MMA8452_INT_DRDY) {
+		iio_trigger_poll_chained(indio_dev->trig);
+		ret = IRQ_HANDLED;
+	}
+
+	if (src & MMA8452_INT_FF_MT) {
+		if (mma8452_freefall_mode_enabled(data)) {
+			s64 ts = iio_get_time_ns(indio_dev);
+
+			iio_push_event(indio_dev,
+				       IIO_MOD_EVENT_CODE(IIO_ACCEL, 0,
+							  IIO_MOD_X_AND_Y_AND_Z,
+							  IIO_EV_TYPE_MAG,
+							  IIO_EV_DIR_FALLING),
+					ts);
+		}
+		ret = IRQ_HANDLED;
+	}
+
+	if (src & MMA8452_INT_TRANS) {
+		mma8452_transient_interrupt(indio_dev);
+		ret = IRQ_HANDLED;
+	}
+
+	return ret;
+}
+
+static irqreturn_t mma8452_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = mma8452_read(data, data->buffer.channels);
+	if (ret < 0)
+		goto done;
+
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->buffer,
+					   iio_get_time_ns(indio_dev));
+
+done:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int mma8452_reg_access_dbg(struct iio_dev *indio_dev,
+				  unsigned int reg, unsigned int writeval,
+				  unsigned int *readval)
+{
+	int ret;
+	struct mma8452_data *data = iio_priv(indio_dev);
+
+	if (reg > MMA8452_MAX_REG)
+		return -EINVAL;
+
+	if (!readval)
+		return mma8452_change_config(data, reg, writeval);
+
+	ret = i2c_smbus_read_byte_data(data->client, reg);
+	if (ret < 0)
+		return ret;
+
+	*readval = ret;
+
+	return 0;
+}
+
+static const struct iio_event_spec mma8452_freefall_event[] = {
+	{
+		.type = IIO_EV_TYPE_MAG,
+		.dir = IIO_EV_DIR_FALLING,
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE),
+		.mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
+					BIT(IIO_EV_INFO_PERIOD) |
+					BIT(IIO_EV_INFO_HIGH_PASS_FILTER_3DB)
+	},
+};
+
+static const struct iio_event_spec mma8652_freefall_event[] = {
+	{
+		.type = IIO_EV_TYPE_MAG,
+		.dir = IIO_EV_DIR_FALLING,
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE),
+		.mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
+					BIT(IIO_EV_INFO_PERIOD)
+	},
+};
+
+static const struct iio_event_spec mma8452_transient_event[] = {
+	{
+		.type = IIO_EV_TYPE_MAG,
+		.dir = IIO_EV_DIR_RISING,
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE),
+		.mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
+					BIT(IIO_EV_INFO_PERIOD) |
+					BIT(IIO_EV_INFO_HIGH_PASS_FILTER_3DB)
+	},
+};
+
+static const struct iio_event_spec mma8452_motion_event[] = {
+	{
+		.type = IIO_EV_TYPE_MAG,
+		.dir = IIO_EV_DIR_RISING,
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE),
+		.mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
+					BIT(IIO_EV_INFO_PERIOD)
+	},
+};
+
+/*
+ * Threshold is configured in fixed 8G/127 steps regardless of
+ * currently selected scale for measurement.
+ */
+static IIO_CONST_ATTR_NAMED(accel_transient_scale, in_accel_scale, "0.617742");
+
+static struct attribute *mma8452_event_attributes[] = {
+	&iio_const_attr_accel_transient_scale.dev_attr.attr,
+	NULL,
+};
+
+static struct attribute_group mma8452_event_attribute_group = {
+	.attrs = mma8452_event_attributes,
+};
+
+#define MMA8452_FREEFALL_CHANNEL(modifier) { \
+	.type = IIO_ACCEL, \
+	.modified = 1, \
+	.channel2 = modifier, \
+	.scan_index = -1, \
+	.event_spec = mma8452_freefall_event, \
+	.num_event_specs = ARRAY_SIZE(mma8452_freefall_event), \
+}
+
+#define MMA8652_FREEFALL_CHANNEL(modifier) { \
+	.type = IIO_ACCEL, \
+	.modified = 1, \
+	.channel2 = modifier, \
+	.scan_index = -1, \
+	.event_spec = mma8652_freefall_event, \
+	.num_event_specs = ARRAY_SIZE(mma8652_freefall_event), \
+}
+
+#define MMA8452_CHANNEL(axis, idx, bits) { \
+	.type = IIO_ACCEL, \
+	.modified = 1, \
+	.channel2 = IIO_MOD_##axis, \
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+			      BIT(IIO_CHAN_INFO_CALIBBIAS), \
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
+			BIT(IIO_CHAN_INFO_SCALE) | \
+			BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY) | \
+			BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \
+	.scan_index = idx, \
+	.scan_type = { \
+		.sign = 's', \
+		.realbits = (bits), \
+		.storagebits = 16, \
+		.shift = 16 - (bits), \
+		.endianness = IIO_BE, \
+	}, \
+	.event_spec = mma8452_transient_event, \
+	.num_event_specs = ARRAY_SIZE(mma8452_transient_event), \
+}
+
+#define MMA8652_CHANNEL(axis, idx, bits) { \
+	.type = IIO_ACCEL, \
+	.modified = 1, \
+	.channel2 = IIO_MOD_##axis, \
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+		BIT(IIO_CHAN_INFO_CALIBBIAS), \
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
+		BIT(IIO_CHAN_INFO_SCALE) | \
+		BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \
+	.scan_index = idx, \
+	.scan_type = { \
+		.sign = 's', \
+		.realbits = (bits), \
+		.storagebits = 16, \
+		.shift = 16 - (bits), \
+		.endianness = IIO_BE, \
+	}, \
+	.event_spec = mma8452_motion_event, \
+	.num_event_specs = ARRAY_SIZE(mma8452_motion_event), \
+}
+
+static const struct iio_chan_spec mma8451_channels[] = {
+	MMA8452_CHANNEL(X, idx_x, 14),
+	MMA8452_CHANNEL(Y, idx_y, 14),
+	MMA8452_CHANNEL(Z, idx_z, 14),
+	IIO_CHAN_SOFT_TIMESTAMP(idx_ts),
+	MMA8452_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z),
+};
+
+static const struct iio_chan_spec mma8452_channels[] = {
+	MMA8452_CHANNEL(X, idx_x, 12),
+	MMA8452_CHANNEL(Y, idx_y, 12),
+	MMA8452_CHANNEL(Z, idx_z, 12),
+	IIO_CHAN_SOFT_TIMESTAMP(idx_ts),
+	MMA8452_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z),
+};
+
+static const struct iio_chan_spec mma8453_channels[] = {
+	MMA8452_CHANNEL(X, idx_x, 10),
+	MMA8452_CHANNEL(Y, idx_y, 10),
+	MMA8452_CHANNEL(Z, idx_z, 10),
+	IIO_CHAN_SOFT_TIMESTAMP(idx_ts),
+	MMA8452_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z),
+};
+
+static const struct iio_chan_spec mma8652_channels[] = {
+	MMA8652_CHANNEL(X, idx_x, 12),
+	MMA8652_CHANNEL(Y, idx_y, 12),
+	MMA8652_CHANNEL(Z, idx_z, 12),
+	IIO_CHAN_SOFT_TIMESTAMP(idx_ts),
+	MMA8652_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z),
+};
+
+static const struct iio_chan_spec mma8653_channels[] = {
+	MMA8652_CHANNEL(X, idx_x, 10),
+	MMA8652_CHANNEL(Y, idx_y, 10),
+	MMA8652_CHANNEL(Z, idx_z, 10),
+	IIO_CHAN_SOFT_TIMESTAMP(idx_ts),
+	MMA8652_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z),
+};
+
+enum {
+	mma8451,
+	mma8452,
+	mma8453,
+	mma8652,
+	mma8653,
+	fxls8471,
+};
+
+static const struct mma_chip_info mma_chip_info_table[] = {
+	[mma8451] = {
+		.name = "mma8451",
+		.chip_id = MMA8451_DEVICE_ID,
+		.channels = mma8451_channels,
+		.num_channels = ARRAY_SIZE(mma8451_channels),
+		/*
+		 * Hardware has fullscale of -2G, -4G, -8G corresponding to
+		 * raw value -8192 for 14 bit, -2048 for 12 bit or -512 for 10
+		 * bit.
+		 * The userspace interface uses m/s^2 and we declare micro units
+		 * So scale factor for 12 bit here is given by:
+		 *	g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665
+		 */
+		.mma_scales = { {0, 2394}, {0, 4788}, {0, 9577} },
+		/*
+		 * Although we enable the interrupt sources once and for
+		 * all here the event detection itself is not enabled until
+		 * userspace asks for it by mma8452_write_event_config()
+		 */
+		.all_events = MMA8452_INT_DRDY |
+					MMA8452_INT_TRANS |
+					MMA8452_INT_FF_MT,
+		.enabled_events = MMA8452_INT_TRANS |
+					MMA8452_INT_FF_MT,
+	},
+	[mma8452] = {
+		.name = "mma8452",
+		.chip_id = MMA8452_DEVICE_ID,
+		.channels = mma8452_channels,
+		.num_channels = ARRAY_SIZE(mma8452_channels),
+		.mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} },
+		/*
+		 * Although we enable the interrupt sources once and for
+		 * all here the event detection itself is not enabled until
+		 * userspace asks for it by mma8452_write_event_config()
+		 */
+		.all_events = MMA8452_INT_DRDY |
+					MMA8452_INT_TRANS |
+					MMA8452_INT_FF_MT,
+		.enabled_events = MMA8452_INT_TRANS |
+					MMA8452_INT_FF_MT,
+	},
+	[mma8453] = {
+		.name = "mma8453",
+		.chip_id = MMA8453_DEVICE_ID,
+		.channels = mma8453_channels,
+		.num_channels = ARRAY_SIZE(mma8453_channels),
+		.mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} },
+		/*
+		 * Although we enable the interrupt sources once and for
+		 * all here the event detection itself is not enabled until
+		 * userspace asks for it by mma8452_write_event_config()
+		 */
+		.all_events = MMA8452_INT_DRDY |
+					MMA8452_INT_TRANS |
+					MMA8452_INT_FF_MT,
+		.enabled_events = MMA8452_INT_TRANS |
+					MMA8452_INT_FF_MT,
+	},
+	[mma8652] = {
+		.name = "mma8652",
+		.chip_id = MMA8652_DEVICE_ID,
+		.channels = mma8652_channels,
+		.num_channels = ARRAY_SIZE(mma8652_channels),
+		.mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} },
+		.all_events = MMA8452_INT_DRDY |
+					MMA8452_INT_FF_MT,
+		.enabled_events = MMA8452_INT_FF_MT,
+	},
+	[mma8653] = {
+		.name = "mma8653",
+		.chip_id = MMA8653_DEVICE_ID,
+		.channels = mma8653_channels,
+		.num_channels = ARRAY_SIZE(mma8653_channels),
+		.mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} },
+		/*
+		 * Although we enable the interrupt sources once and for
+		 * all here the event detection itself is not enabled until
+		 * userspace asks for it by mma8452_write_event_config()
+		 */
+		.all_events = MMA8452_INT_DRDY |
+					MMA8452_INT_FF_MT,
+		.enabled_events = MMA8452_INT_FF_MT,
+	},
+	[fxls8471] = {
+		.name = "fxls8471",
+		.chip_id = FXLS8471_DEVICE_ID,
+		.channels = mma8451_channels,
+		.num_channels = ARRAY_SIZE(mma8451_channels),
+		.mma_scales = { {0, 2394}, {0, 4788}, {0, 9577} },
+		/*
+		 * Although we enable the interrupt sources once and for
+		 * all here the event detection itself is not enabled until
+		 * userspace asks for it by mma8452_write_event_config()
+		 */
+		.all_events = MMA8452_INT_DRDY |
+					MMA8452_INT_TRANS |
+					MMA8452_INT_FF_MT,
+		.enabled_events = MMA8452_INT_TRANS |
+					MMA8452_INT_FF_MT,
+	},
+};
+
+static struct attribute *mma8452_attributes[] = {
+	&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+	&iio_dev_attr_in_accel_scale_available.dev_attr.attr,
+	&iio_dev_attr_in_accel_filter_high_pass_3db_frequency_available.dev_attr.attr,
+	&iio_dev_attr_in_accel_oversampling_ratio_available.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group mma8452_group = {
+	.attrs = mma8452_attributes,
+};
+
+static const struct iio_info mma8452_info = {
+	.attrs = &mma8452_group,
+	.read_raw = &mma8452_read_raw,
+	.write_raw = &mma8452_write_raw,
+	.event_attrs = &mma8452_event_attribute_group,
+	.read_event_value = &mma8452_read_event_value,
+	.write_event_value = &mma8452_write_event_value,
+	.read_event_config = &mma8452_read_event_config,
+	.write_event_config = &mma8452_write_event_config,
+	.debugfs_reg_access = &mma8452_reg_access_dbg,
+};
+
+static const unsigned long mma8452_scan_masks[] = {0x7, 0};
+
+static int mma8452_data_rdy_trigger_set_state(struct iio_trigger *trig,
+					      bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int reg, ret;
+
+	ret = mma8452_set_runtime_pm_state(data->client, state);
+	if (ret)
+		return ret;
+
+	reg = i2c_smbus_read_byte_data(data->client, MMA8452_CTRL_REG4);
+	if (reg < 0)
+		return reg;
+
+	if (state)
+		reg |= MMA8452_INT_DRDY;
+	else
+		reg &= ~MMA8452_INT_DRDY;
+
+	return mma8452_change_config(data, MMA8452_CTRL_REG4, reg);
+}
+
+static const struct iio_trigger_ops mma8452_trigger_ops = {
+	.set_trigger_state = mma8452_data_rdy_trigger_set_state,
+	.validate_device = iio_trigger_validate_own_device,
+};
+
+static int mma8452_trigger_setup(struct iio_dev *indio_dev)
+{
+	struct mma8452_data *data = iio_priv(indio_dev);
+	struct iio_trigger *trig;
+	int ret;
+
+	trig = devm_iio_trigger_alloc(&data->client->dev, "%s-dev%d",
+				      indio_dev->name,
+				      indio_dev->id);
+	if (!trig)
+		return -ENOMEM;
+
+	trig->dev.parent = &data->client->dev;
+	trig->ops = &mma8452_trigger_ops;
+	iio_trigger_set_drvdata(trig, indio_dev);
+
+	ret = iio_trigger_register(trig);
+	if (ret)
+		return ret;
+
+	indio_dev->trig = iio_trigger_get(trig);
+
+	return 0;
+}
+
+static void mma8452_trigger_cleanup(struct iio_dev *indio_dev)
+{
+	if (indio_dev->trig)
+		iio_trigger_unregister(indio_dev->trig);
+}
+
+static int mma8452_reset(struct i2c_client *client)
+{
+	int i;
+	int ret;
+
+	/*
+	 * Find on fxls8471, after config reset bit, it reset immediately,
+	 * and will not give ACK, so here do not check the return value.
+	 * The following code will read the reset register, and check whether
+	 * this reset works.
+	 */
+	i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG2,
+					MMA8452_CTRL_REG2_RST);
+
+	for (i = 0; i < 10; i++) {
+		usleep_range(100, 200);
+		ret = i2c_smbus_read_byte_data(client, MMA8452_CTRL_REG2);
+		if (ret == -EIO)
+			continue; /* I2C comm reset */
+		if (ret < 0)
+			return ret;
+		if (!(ret & MMA8452_CTRL_REG2_RST))
+			return 0;
+	}
+
+	return -ETIMEDOUT;
+}
+
+static const struct of_device_id mma8452_dt_ids[] = {
+	{ .compatible = "fsl,mma8451", .data = &mma_chip_info_table[mma8451] },
+	{ .compatible = "fsl,mma8452", .data = &mma_chip_info_table[mma8452] },
+	{ .compatible = "fsl,mma8453", .data = &mma_chip_info_table[mma8453] },
+	{ .compatible = "fsl,mma8652", .data = &mma_chip_info_table[mma8652] },
+	{ .compatible = "fsl,mma8653", .data = &mma_chip_info_table[mma8653] },
+	{ .compatible = "fsl,fxls8471", .data = &mma_chip_info_table[fxls8471] },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, mma8452_dt_ids);
+
+static int mma8452_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct mma8452_data *data;
+	struct iio_dev *indio_dev;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	mutex_init(&data->lock);
+
+	data->chip_info = device_get_match_data(&client->dev);
+	if (!data->chip_info) {
+		if (id) {
+			data->chip_info = &mma_chip_info_table[id->driver_data];
+		} else {
+			dev_err(&client->dev, "unknown device model\n");
+			return -ENODEV;
+		}
+	}
+
+	data->vdd_reg = devm_regulator_get(&client->dev, "vdd");
+	if (IS_ERR(data->vdd_reg))
+		return dev_err_probe(&client->dev, PTR_ERR(data->vdd_reg),
+				     "failed to get VDD regulator!\n");
+
+	data->vddio_reg = devm_regulator_get(&client->dev, "vddio");
+	if (IS_ERR(data->vddio_reg))
+		return dev_err_probe(&client->dev, PTR_ERR(data->vddio_reg),
+				     "failed to get VDDIO regulator!\n");
+
+	ret = regulator_enable(data->vdd_reg);
+	if (ret) {
+		dev_err(&client->dev, "failed to enable VDD regulator!\n");
+		return ret;
+	}
+
+	ret = regulator_enable(data->vddio_reg);
+	if (ret) {
+		dev_err(&client->dev, "failed to enable VDDIO regulator!\n");
+		goto disable_regulator_vdd;
+	}
+
+	ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
+	if (ret < 0)
+		goto disable_regulators;
+
+	switch (ret) {
+	case MMA8451_DEVICE_ID:
+	case MMA8452_DEVICE_ID:
+	case MMA8453_DEVICE_ID:
+	case MMA8652_DEVICE_ID:
+	case MMA8653_DEVICE_ID:
+	case FXLS8471_DEVICE_ID:
+		if (ret == data->chip_info->chip_id)
+			break;
+		fallthrough;
+	default:
+		ret = -ENODEV;
+		goto disable_regulators;
+	}
+
+	dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n",
+		 data->chip_info->name, data->chip_info->chip_id);
+
+	i2c_set_clientdata(client, indio_dev);
+	indio_dev->info = &mma8452_info;
+	indio_dev->name = data->chip_info->name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = data->chip_info->channels;
+	indio_dev->num_channels = data->chip_info->num_channels;
+	indio_dev->available_scan_masks = mma8452_scan_masks;
+
+	ret = mma8452_reset(client);
+	if (ret < 0)
+		goto disable_regulators;
+
+	data->data_cfg = MMA8452_DATA_CFG_FS_2G;
+	ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG,
+					data->data_cfg);
+	if (ret < 0)
+		goto disable_regulators;
+
+	/*
+	 * By default set transient threshold to max to avoid events if
+	 * enabling without configuring threshold.
+	 */
+	ret = i2c_smbus_write_byte_data(client, MMA8452_TRANSIENT_THS,
+					MMA8452_TRANSIENT_THS_MASK);
+	if (ret < 0)
+		goto disable_regulators;
+
+	if (client->irq) {
+		int irq2;
+
+		irq2 = of_irq_get_byname(client->dev.of_node, "INT2");
+
+		if (irq2 == client->irq) {
+			dev_dbg(&client->dev, "using interrupt line INT2\n");
+		} else {
+			ret = i2c_smbus_write_byte_data(client,
+						MMA8452_CTRL_REG5,
+						data->chip_info->all_events);
+			if (ret < 0)
+				goto disable_regulators;
+
+			dev_dbg(&client->dev, "using interrupt line INT1\n");
+		}
+
+		ret = i2c_smbus_write_byte_data(client,
+					MMA8452_CTRL_REG4,
+					data->chip_info->enabled_events);
+		if (ret < 0)
+			goto disable_regulators;
+
+		ret = mma8452_trigger_setup(indio_dev);
+		if (ret < 0)
+			goto disable_regulators;
+	}
+
+	data->ctrl_reg1 = MMA8452_CTRL_ACTIVE |
+			  (MMA8452_CTRL_DR_DEFAULT << MMA8452_CTRL_DR_SHIFT);
+
+	data->sleep_val = mma8452_calculate_sleep(data);
+
+	ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1,
+					data->ctrl_reg1);
+	if (ret < 0)
+		goto trigger_cleanup;
+
+	ret = iio_triggered_buffer_setup(indio_dev, NULL,
+					 mma8452_trigger_handler, NULL);
+	if (ret < 0)
+		goto trigger_cleanup;
+
+	if (client->irq) {
+		ret = devm_request_threaded_irq(&client->dev,
+						client->irq,
+						NULL, mma8452_interrupt,
+						IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+						client->name, indio_dev);
+		if (ret)
+			goto buffer_cleanup;
+	}
+
+	ret = pm_runtime_set_active(&client->dev);
+	if (ret < 0)
+		goto buffer_cleanup;
+
+	pm_runtime_enable(&client->dev);
+	pm_runtime_set_autosuspend_delay(&client->dev,
+					 MMA8452_AUTO_SUSPEND_DELAY_MS);
+	pm_runtime_use_autosuspend(&client->dev);
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0)
+		goto buffer_cleanup;
+
+	ret = mma8452_set_freefall_mode(data, false);
+	if (ret < 0)
+		goto unregister_device;
+
+	return 0;
+
+unregister_device:
+	iio_device_unregister(indio_dev);
+
+buffer_cleanup:
+	iio_triggered_buffer_cleanup(indio_dev);
+
+trigger_cleanup:
+	mma8452_trigger_cleanup(indio_dev);
+
+disable_regulators:
+	regulator_disable(data->vddio_reg);
+
+disable_regulator_vdd:
+	regulator_disable(data->vdd_reg);
+
+	return ret;
+}
+
+static int mma8452_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct mma8452_data *data = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	pm_runtime_disable(&client->dev);
+	pm_runtime_set_suspended(&client->dev);
+	pm_runtime_put_noidle(&client->dev);
+
+	iio_triggered_buffer_cleanup(indio_dev);
+	mma8452_trigger_cleanup(indio_dev);
+	mma8452_standby(iio_priv(indio_dev));
+
+	regulator_disable(data->vddio_reg);
+	regulator_disable(data->vdd_reg);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int mma8452_runtime_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->lock);
+	ret = mma8452_standby(data);
+	mutex_unlock(&data->lock);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "powering off device failed\n");
+		return -EAGAIN;
+	}
+
+	ret = regulator_disable(data->vddio_reg);
+	if (ret) {
+		dev_err(dev, "failed to disable VDDIO regulator\n");
+		return ret;
+	}
+
+	ret = regulator_disable(data->vdd_reg);
+	if (ret) {
+		dev_err(dev, "failed to disable VDD regulator\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int mma8452_runtime_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct mma8452_data *data = iio_priv(indio_dev);
+	int ret, sleep_val;
+
+	ret = regulator_enable(data->vdd_reg);
+	if (ret) {
+		dev_err(dev, "failed to enable VDD regulator\n");
+		return ret;
+	}
+
+	ret = regulator_enable(data->vddio_reg);
+	if (ret) {
+		dev_err(dev, "failed to enable VDDIO regulator\n");
+		regulator_disable(data->vdd_reg);
+		return ret;
+	}
+
+	ret = mma8452_active(data);
+	if (ret < 0)
+		goto runtime_resume_failed;
+
+	ret = mma8452_get_odr_index(data);
+	sleep_val = 1000 / mma8452_samp_freq[ret][0];
+	if (sleep_val < 20)
+		usleep_range(sleep_val * 1000, 20000);
+	else
+		msleep_interruptible(sleep_val);
+
+	return 0;
+
+runtime_resume_failed:
+	regulator_disable(data->vddio_reg);
+	regulator_disable(data->vdd_reg);
+
+	return ret;
+}
+#endif
+
+static const struct dev_pm_ops mma8452_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(mma8452_runtime_suspend,
+			   mma8452_runtime_resume, NULL)
+};
+
+static const struct i2c_device_id mma8452_id[] = {
+	{ "mma8451", mma8451 },
+	{ "mma8452", mma8452 },
+	{ "mma8453", mma8453 },
+	{ "mma8652", mma8652 },
+	{ "mma8653", mma8653 },
+	{ "fxls8471", fxls8471 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, mma8452_id);
+
+static struct i2c_driver mma8452_driver = {
+	.driver = {
+		.name	= "mma8452",
+		.of_match_table = mma8452_dt_ids,
+		.pm	= &mma8452_pm_ops,
+	},
+	.probe = mma8452_probe,
+	.remove = mma8452_remove,
+	.id_table = mma8452_id,
+};
+module_i2c_driver(mma8452_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("Freescale / NXP MMA8452 accelerometer driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/mma9551.c b/drivers/iio/accel/mma9551.c
new file mode 100644
index 000000000..26421e8e8
--- /dev/null
+++ b/drivers/iio/accel/mma9551.c
@@ -0,0 +1,628 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Freescale MMA9551L Intelligent Motion-Sensing Platform driver
+ * Copyright (c) 2014, Intel Corporation.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/pm_runtime.h>
+#include "mma9551_core.h"
+
+#define MMA9551_DRV_NAME		"mma9551"
+#define MMA9551_IRQ_NAME		"mma9551_event"
+#define MMA9551_GPIO_COUNT		4
+
+/* Tilt application (inclination in IIO terms). */
+#define MMA9551_TILT_XZ_ANG_REG		0x00
+#define MMA9551_TILT_YZ_ANG_REG		0x01
+#define MMA9551_TILT_XY_ANG_REG		0x02
+#define MMA9551_TILT_ANGFLG		BIT(7)
+#define MMA9551_TILT_QUAD_REG		0x03
+#define MMA9551_TILT_XY_QUAD_SHIFT	0
+#define MMA9551_TILT_YZ_QUAD_SHIFT	2
+#define MMA9551_TILT_XZ_QUAD_SHIFT	4
+#define MMA9551_TILT_CFG_REG		0x01
+#define MMA9551_TILT_ANG_THRESH_MASK	GENMASK(3, 0)
+
+#define MMA9551_DEFAULT_SAMPLE_RATE	122	/* Hz */
+
+/* Tilt events are mapped to the first three GPIO pins. */
+enum mma9551_tilt_axis {
+	mma9551_x = 0,
+	mma9551_y,
+	mma9551_z,
+};
+
+struct mma9551_data {
+	struct i2c_client *client;
+	struct mutex mutex;
+	int event_enabled[3];
+	int irqs[MMA9551_GPIO_COUNT];
+};
+
+static int mma9551_read_incli_chan(struct i2c_client *client,
+				   const struct iio_chan_spec *chan,
+				   int *val)
+{
+	u8 quad_shift, angle, quadrant;
+	u16 reg_addr;
+	int ret;
+
+	switch (chan->channel2) {
+	case IIO_MOD_X:
+		reg_addr = MMA9551_TILT_YZ_ANG_REG;
+		quad_shift = MMA9551_TILT_YZ_QUAD_SHIFT;
+		break;
+	case IIO_MOD_Y:
+		reg_addr = MMA9551_TILT_XZ_ANG_REG;
+		quad_shift = MMA9551_TILT_XZ_QUAD_SHIFT;
+		break;
+	case IIO_MOD_Z:
+		reg_addr = MMA9551_TILT_XY_ANG_REG;
+		quad_shift = MMA9551_TILT_XY_QUAD_SHIFT;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ret = mma9551_set_power_state(client, true);
+	if (ret < 0)
+		return ret;
+
+	ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT,
+				       reg_addr, &angle);
+	if (ret < 0)
+		goto out_poweroff;
+
+	ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT,
+				       MMA9551_TILT_QUAD_REG, &quadrant);
+	if (ret < 0)
+		goto out_poweroff;
+
+	angle &= ~MMA9551_TILT_ANGFLG;
+	quadrant = (quadrant >> quad_shift) & 0x03;
+
+	if (quadrant == 1 || quadrant == 3)
+		*val = 90 * (quadrant + 1) - angle;
+	else
+		*val = angle + 90 * quadrant;
+
+	ret = IIO_VAL_INT;
+
+out_poweroff:
+	mma9551_set_power_state(client, false);
+	return ret;
+}
+
+static int mma9551_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct mma9551_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_PROCESSED:
+		switch (chan->type) {
+		case IIO_INCLI:
+			mutex_lock(&data->mutex);
+			ret = mma9551_read_incli_chan(data->client, chan, val);
+			mutex_unlock(&data->mutex);
+			return ret;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_RAW:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			mutex_lock(&data->mutex);
+			ret = mma9551_read_accel_chan(data->client,
+						      chan, val, val2);
+			mutex_unlock(&data->mutex);
+			return ret;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			return mma9551_read_accel_scale(val, val2);
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma9551_read_event_config(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir)
+{
+	struct mma9551_data *data = iio_priv(indio_dev);
+
+	switch (chan->type) {
+	case IIO_INCLI:
+		/* IIO counts axes from 1, because IIO_NO_MOD is 0. */
+		return data->event_enabled[chan->channel2 - 1];
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma9551_config_incli_event(struct iio_dev *indio_dev,
+				      enum iio_modifier axis,
+				      int state)
+{
+	struct mma9551_data *data = iio_priv(indio_dev);
+	enum mma9551_tilt_axis mma_axis;
+	int ret;
+
+	/* IIO counts axes from 1, because IIO_NO_MOD is 0. */
+	mma_axis = axis - 1;
+
+	if (data->event_enabled[mma_axis] == state)
+		return 0;
+
+	if (state == 0) {
+		ret = mma9551_gpio_config(data->client,
+					  (enum mma9551_gpio_pin)mma_axis,
+					  MMA9551_APPID_NONE, 0, 0);
+		if (ret < 0)
+			return ret;
+
+		ret = mma9551_set_power_state(data->client, false);
+		if (ret < 0)
+			return ret;
+	} else {
+		int bitnum;
+
+		/* Bit 7 of each angle register holds the angle flag. */
+		switch (axis) {
+		case IIO_MOD_X:
+			bitnum = 7 + 8 * MMA9551_TILT_YZ_ANG_REG;
+			break;
+		case IIO_MOD_Y:
+			bitnum = 7 + 8 * MMA9551_TILT_XZ_ANG_REG;
+			break;
+		case IIO_MOD_Z:
+			bitnum = 7 + 8 * MMA9551_TILT_XY_ANG_REG;
+			break;
+		default:
+			return -EINVAL;
+		}
+
+
+		ret = mma9551_set_power_state(data->client, true);
+		if (ret < 0)
+			return ret;
+
+		ret = mma9551_gpio_config(data->client,
+					  (enum mma9551_gpio_pin)mma_axis,
+					  MMA9551_APPID_TILT, bitnum, 0);
+		if (ret < 0) {
+			mma9551_set_power_state(data->client, false);
+			return ret;
+		}
+	}
+
+	data->event_enabled[mma_axis] = state;
+
+	return ret;
+}
+
+static int mma9551_write_event_config(struct iio_dev *indio_dev,
+				      const struct iio_chan_spec *chan,
+				      enum iio_event_type type,
+				      enum iio_event_direction dir,
+				      int state)
+{
+	struct mma9551_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (chan->type) {
+	case IIO_INCLI:
+		mutex_lock(&data->mutex);
+		ret = mma9551_config_incli_event(indio_dev,
+						 chan->channel2, state);
+		mutex_unlock(&data->mutex);
+		return ret;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma9551_write_event_value(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir,
+				     enum iio_event_info info,
+				     int val, int val2)
+{
+	struct mma9551_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (chan->type) {
+	case IIO_INCLI:
+		if (val2 != 0 || val < 1 || val > 10)
+			return -EINVAL;
+		mutex_lock(&data->mutex);
+		ret = mma9551_update_config_bits(data->client,
+						 MMA9551_APPID_TILT,
+						 MMA9551_TILT_CFG_REG,
+						 MMA9551_TILT_ANG_THRESH_MASK,
+						 val);
+		mutex_unlock(&data->mutex);
+		return ret;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma9551_read_event_value(struct iio_dev *indio_dev,
+				    const struct iio_chan_spec *chan,
+				    enum iio_event_type type,
+				    enum iio_event_direction dir,
+				    enum iio_event_info info,
+				    int *val, int *val2)
+{
+	struct mma9551_data *data = iio_priv(indio_dev);
+	int ret;
+	u8 tmp;
+
+	switch (chan->type) {
+	case IIO_INCLI:
+		mutex_lock(&data->mutex);
+		ret = mma9551_read_config_byte(data->client,
+					       MMA9551_APPID_TILT,
+					       MMA9551_TILT_CFG_REG, &tmp);
+		mutex_unlock(&data->mutex);
+		if (ret < 0)
+			return ret;
+		*val = tmp & MMA9551_TILT_ANG_THRESH_MASK;
+		*val2 = 0;
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_event_spec mma9551_incli_event = {
+	.type = IIO_EV_TYPE_ROC,
+	.dir = IIO_EV_DIR_RISING,
+	.mask_separate = BIT(IIO_EV_INFO_ENABLE),
+	.mask_shared_by_type = BIT(IIO_EV_INFO_VALUE),
+};
+
+#define MMA9551_INCLI_CHANNEL(axis) {				\
+	.type = IIO_INCLI,					\
+	.modified = 1,						\
+	.channel2 = axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),	\
+	.event_spec = &mma9551_incli_event,			\
+	.num_event_specs = 1,					\
+}
+
+static const struct iio_chan_spec mma9551_channels[] = {
+	MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
+	MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
+	MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
+
+	MMA9551_INCLI_CHANNEL(IIO_MOD_X),
+	MMA9551_INCLI_CHANNEL(IIO_MOD_Y),
+	MMA9551_INCLI_CHANNEL(IIO_MOD_Z),
+};
+
+static const struct iio_info mma9551_info = {
+	.read_raw = mma9551_read_raw,
+	.read_event_config = mma9551_read_event_config,
+	.write_event_config = mma9551_write_event_config,
+	.read_event_value = mma9551_read_event_value,
+	.write_event_value = mma9551_write_event_value,
+};
+
+static irqreturn_t mma9551_event_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct mma9551_data *data = iio_priv(indio_dev);
+	int i, ret, mma_axis = -1;
+	u16 reg;
+	u8 val;
+
+	mutex_lock(&data->mutex);
+
+	for (i = 0; i < 3; i++)
+		if (irq == data->irqs[i]) {
+			mma_axis = i;
+			break;
+		}
+
+	if (mma_axis == -1) {
+		/* IRQ was triggered on 4th line, which we don't use. */
+		dev_warn(&data->client->dev,
+			 "irq triggered on unused line %d\n", data->irqs[3]);
+		goto out;
+	}
+
+	switch (mma_axis) {
+	case mma9551_x:
+		reg = MMA9551_TILT_YZ_ANG_REG;
+		break;
+	case mma9551_y:
+		reg = MMA9551_TILT_XZ_ANG_REG;
+		break;
+	case mma9551_z:
+		reg = MMA9551_TILT_XY_ANG_REG;
+		break;
+	}
+
+	/*
+	 * Read the angle even though we don't use it, otherwise we
+	 * won't get any further interrupts.
+	 */
+	ret = mma9551_read_status_byte(data->client, MMA9551_APPID_TILT,
+				       reg, &val);
+	if (ret < 0) {
+		dev_err(&data->client->dev,
+			"error %d reading tilt register in IRQ\n", ret);
+		goto out;
+	}
+
+	iio_push_event(indio_dev,
+		       IIO_MOD_EVENT_CODE(IIO_INCLI, 0, (mma_axis + 1),
+					  IIO_EV_TYPE_ROC, IIO_EV_DIR_RISING),
+		       iio_get_time_ns(indio_dev));
+
+out:
+	mutex_unlock(&data->mutex);
+
+	return IRQ_HANDLED;
+}
+
+static int mma9551_init(struct mma9551_data *data)
+{
+	int ret;
+
+	ret = mma9551_read_version(data->client);
+	if (ret)
+		return ret;
+
+	return mma9551_set_device_state(data->client, true);
+}
+
+static int mma9551_gpio_probe(struct iio_dev *indio_dev)
+{
+	struct gpio_desc *gpio;
+	int i, ret;
+	struct mma9551_data *data = iio_priv(indio_dev);
+	struct device *dev = &data->client->dev;
+
+	for (i = 0; i < MMA9551_GPIO_COUNT; i++) {
+		gpio = devm_gpiod_get_index(dev, NULL, i, GPIOD_IN);
+		if (IS_ERR(gpio)) {
+			dev_err(dev, "acpi gpio get index failed\n");
+			return PTR_ERR(gpio);
+		}
+
+		ret = gpiod_to_irq(gpio);
+		if (ret < 0)
+			return ret;
+
+		data->irqs[i] = ret;
+		ret = devm_request_threaded_irq(dev, data->irqs[i],
+				NULL, mma9551_event_handler,
+				IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+				MMA9551_IRQ_NAME, indio_dev);
+		if (ret < 0) {
+			dev_err(dev, "request irq %d failed\n", data->irqs[i]);
+			return ret;
+		}
+
+		dev_dbg(dev, "gpio resource, no:%d irq:%d\n",
+			desc_to_gpio(gpio), data->irqs[i]);
+	}
+
+	return 0;
+}
+
+static const char *mma9551_match_acpi_device(struct device *dev)
+{
+	const struct acpi_device_id *id;
+
+	id = acpi_match_device(dev->driver->acpi_match_table, dev);
+	if (!id)
+		return NULL;
+
+	return dev_name(dev);
+}
+
+static int mma9551_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct mma9551_data *data;
+	struct iio_dev *indio_dev;
+	const char *name = NULL;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	data->client = client;
+
+	if (id)
+		name = id->name;
+	else if (ACPI_HANDLE(&client->dev))
+		name = mma9551_match_acpi_device(&client->dev);
+
+	ret = mma9551_init(data);
+	if (ret < 0)
+		return ret;
+
+	mutex_init(&data->mutex);
+
+	indio_dev->channels = mma9551_channels;
+	indio_dev->num_channels = ARRAY_SIZE(mma9551_channels);
+	indio_dev->name = name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &mma9551_info;
+
+	ret = mma9551_gpio_probe(indio_dev);
+	if (ret < 0)
+		goto out_poweroff;
+
+	ret = pm_runtime_set_active(&client->dev);
+	if (ret < 0)
+		goto out_poweroff;
+
+	pm_runtime_enable(&client->dev);
+	pm_runtime_set_autosuspend_delay(&client->dev,
+					 MMA9551_AUTO_SUSPEND_DELAY_MS);
+	pm_runtime_use_autosuspend(&client->dev);
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "unable to register iio device\n");
+		goto err_pm_cleanup;
+	}
+
+	return 0;
+
+err_pm_cleanup:
+	pm_runtime_dont_use_autosuspend(&client->dev);
+	pm_runtime_disable(&client->dev);
+out_poweroff:
+	mma9551_set_device_state(client, false);
+
+	return ret;
+}
+
+static int mma9551_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct mma9551_data *data = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	pm_runtime_disable(&client->dev);
+	pm_runtime_set_suspended(&client->dev);
+	pm_runtime_put_noidle(&client->dev);
+
+	mutex_lock(&data->mutex);
+	mma9551_set_device_state(data->client, false);
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int mma9551_runtime_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct mma9551_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = mma9551_set_device_state(data->client, false);
+	mutex_unlock(&data->mutex);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "powering off device failed\n");
+		return -EAGAIN;
+	}
+
+	return 0;
+}
+
+static int mma9551_runtime_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct mma9551_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = mma9551_set_device_state(data->client, true);
+	if (ret < 0)
+		return ret;
+
+	mma9551_sleep(MMA9551_DEFAULT_SAMPLE_RATE);
+
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int mma9551_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct mma9551_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = mma9551_set_device_state(data->client, false);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static int mma9551_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct mma9551_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = mma9551_set_device_state(data->client, true);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+#endif
+
+static const struct dev_pm_ops mma9551_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(mma9551_suspend, mma9551_resume)
+	SET_RUNTIME_PM_OPS(mma9551_runtime_suspend,
+			   mma9551_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id mma9551_acpi_match[] = {
+	{"MMA9551", 0},
+	{},
+};
+
+MODULE_DEVICE_TABLE(acpi, mma9551_acpi_match);
+
+static const struct i2c_device_id mma9551_id[] = {
+	{"mma9551", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, mma9551_id);
+
+static struct i2c_driver mma9551_driver = {
+	.driver = {
+		   .name = MMA9551_DRV_NAME,
+		   .acpi_match_table = ACPI_PTR(mma9551_acpi_match),
+		   .pm = &mma9551_pm_ops,
+		   },
+	.probe = mma9551_probe,
+	.remove = mma9551_remove,
+	.id_table = mma9551_id,
+};
+
+module_i2c_driver(mma9551_driver);
+
+MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
+MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MMA9551L motion-sensing platform driver");
diff --git a/drivers/iio/accel/mma9551_core.c b/drivers/iio/accel/mma9551_core.c
new file mode 100644
index 000000000..9bb5c2fea
--- /dev/null
+++ b/drivers/iio/accel/mma9551_core.c
@@ -0,0 +1,808 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Common code for Freescale MMA955x Intelligent Sensor Platform drivers
+ * Copyright (c) 2014, Intel Corporation.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/pm_runtime.h>
+#include "mma9551_core.h"
+
+/* Command masks for mailbox write command */
+#define MMA9551_CMD_READ_VERSION_INFO	0x00
+#define MMA9551_CMD_READ_CONFIG		0x10
+#define MMA9551_CMD_WRITE_CONFIG	0x20
+#define MMA9551_CMD_READ_STATUS		0x30
+
+/* Mailbox read command */
+#define MMA9551_RESPONSE_COCO		BIT(7)
+
+/* Error-Status codes returned in mailbox read command */
+#define MMA9551_MCI_ERROR_NONE			0x00
+#define MMA9551_MCI_ERROR_PARAM			0x04
+#define MMA9551_MCI_INVALID_COUNT		0x19
+#define MMA9551_MCI_ERROR_COMMAND		0x1C
+#define MMA9551_MCI_ERROR_INVALID_LENGTH	0x21
+#define MMA9551_MCI_ERROR_FIFO_BUSY		0x22
+#define MMA9551_MCI_ERROR_FIFO_ALLOCATED	0x23
+#define MMA9551_MCI_ERROR_FIFO_OVERSIZE		0x24
+
+/* GPIO Application */
+#define MMA9551_GPIO_POL_MSB		0x08
+#define MMA9551_GPIO_POL_LSB		0x09
+
+/* Sleep/Wake application */
+#define MMA9551_SLEEP_CFG		0x06
+#define MMA9551_SLEEP_CFG_SNCEN		BIT(0)
+#define MMA9551_SLEEP_CFG_FLEEN		BIT(1)
+#define MMA9551_SLEEP_CFG_SCHEN		BIT(2)
+
+/* AFE application */
+#define MMA9551_AFE_X_ACCEL_REG		0x00
+#define MMA9551_AFE_Y_ACCEL_REG		0x02
+#define MMA9551_AFE_Z_ACCEL_REG		0x04
+
+/* Reset/Suspend/Clear application */
+#define MMA9551_RSC_RESET		0x00
+#define MMA9551_RSC_OFFSET(mask)	(3 - (ffs(mask) - 1) / 8)
+#define MMA9551_RSC_VAL(mask)		(mask >> (((ffs(mask) - 1) / 8) * 8))
+
+/*
+ * A response is composed of:
+ * - control registers: MB0-3
+ * - data registers: MB4-31
+ *
+ * A request is composed of:
+ * - mbox to write to (always 0)
+ * - control registers: MB1-4
+ * - data registers: MB5-31
+ */
+#define MMA9551_MAILBOX_CTRL_REGS	4
+#define MMA9551_MAX_MAILBOX_DATA_REGS	28
+#define MMA9551_MAILBOX_REGS		32
+
+#define MMA9551_I2C_READ_RETRIES	5
+#define MMA9551_I2C_READ_DELAY	50	/* us */
+
+struct mma9551_mbox_request {
+	u8 start_mbox;		/* Always 0. */
+	u8 app_id;
+	/*
+	 * See Section 5.3.1 of the MMA955xL Software Reference Manual.
+	 *
+	 * Bit 7: reserved, always 0
+	 * Bits 6-4: command
+	 * Bits 3-0: upper bits of register offset
+	 */
+	u8 cmd_off;
+	u8 lower_off;
+	u8 nbytes;
+	u8 buf[MMA9551_MAX_MAILBOX_DATA_REGS - 1];
+} __packed;
+
+struct mma9551_mbox_response {
+	u8 app_id;
+	/*
+	 * See Section 5.3.3 of the MMA955xL Software Reference Manual.
+	 *
+	 * Bit 7: COCO
+	 * Bits 6-0: Error code.
+	 */
+	u8 coco_err;
+	u8 nbytes;
+	u8 req_bytes;
+	u8 buf[MMA9551_MAX_MAILBOX_DATA_REGS];
+} __packed;
+
+struct mma9551_version_info {
+	__be32 device_id;
+	u8 rom_version[2];
+	u8 fw_version[2];
+	u8 hw_version[2];
+	u8 fw_build[2];
+};
+
+static int mma9551_transfer(struct i2c_client *client,
+			    u8 app_id, u8 command, u16 offset,
+			    u8 *inbytes, int num_inbytes,
+			    u8 *outbytes, int num_outbytes)
+{
+	struct mma9551_mbox_request req;
+	struct mma9551_mbox_response rsp;
+	struct i2c_msg in, out;
+	u8 req_len, err_code;
+	int ret, retries;
+
+	if (offset >= 1 << 12) {
+		dev_err(&client->dev, "register offset too large\n");
+		return -EINVAL;
+	}
+
+	req_len = 1 + MMA9551_MAILBOX_CTRL_REGS + num_inbytes;
+	req.start_mbox = 0;
+	req.app_id = app_id;
+	req.cmd_off = command | (offset >> 8);
+	req.lower_off = offset;
+
+	if (command == MMA9551_CMD_WRITE_CONFIG)
+		req.nbytes = num_inbytes;
+	else
+		req.nbytes = num_outbytes;
+	if (num_inbytes)
+		memcpy(req.buf, inbytes, num_inbytes);
+
+	out.addr = client->addr;
+	out.flags = 0;
+	out.len = req_len;
+	out.buf = (u8 *)&req;
+
+	ret = i2c_transfer(client->adapter, &out, 1);
+	if (ret < 0) {
+		dev_err(&client->dev, "i2c write failed\n");
+		return ret;
+	}
+
+	retries = MMA9551_I2C_READ_RETRIES;
+	do {
+		udelay(MMA9551_I2C_READ_DELAY);
+
+		in.addr = client->addr;
+		in.flags = I2C_M_RD;
+		in.len = sizeof(rsp);
+		in.buf = (u8 *)&rsp;
+
+		ret = i2c_transfer(client->adapter, &in, 1);
+		if (ret < 0) {
+			dev_err(&client->dev, "i2c read failed\n");
+			return ret;
+		}
+
+		if (rsp.coco_err & MMA9551_RESPONSE_COCO)
+			break;
+	} while (--retries > 0);
+
+	if (retries == 0) {
+		dev_err(&client->dev,
+			"timed out while waiting for command response\n");
+		return -ETIMEDOUT;
+	}
+
+	if (rsp.app_id != app_id) {
+		dev_err(&client->dev,
+			"app_id mismatch in response got %02x expected %02x\n",
+			rsp.app_id, app_id);
+		return -EINVAL;
+	}
+
+	err_code = rsp.coco_err & ~MMA9551_RESPONSE_COCO;
+	if (err_code != MMA9551_MCI_ERROR_NONE) {
+		dev_err(&client->dev, "read returned error %x\n", err_code);
+		return -EINVAL;
+	}
+
+	if (rsp.nbytes != rsp.req_bytes) {
+		dev_err(&client->dev,
+			"output length mismatch got %d expected %d\n",
+			rsp.nbytes, rsp.req_bytes);
+		return -EINVAL;
+	}
+
+	if (num_outbytes)
+		memcpy(outbytes, rsp.buf, num_outbytes);
+
+	return 0;
+}
+
+/**
+ * mma9551_read_config_byte() - read 1 configuration byte
+ * @client:	I2C client
+ * @app_id:	Application ID
+ * @reg:	Application register
+ * @val:	Pointer to store value read
+ *
+ * Read one configuration byte from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed
+ * by one or more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_config_byte(struct i2c_client *client, u8 app_id,
+			     u16 reg, u8 *val)
+{
+	return mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
+				reg, NULL, 0, val, 1);
+}
+EXPORT_SYMBOL(mma9551_read_config_byte);
+
+/**
+ * mma9551_write_config_byte() - write 1 configuration byte
+ * @client:	I2C client
+ * @app_id:	Application ID
+ * @reg:	Application register
+ * @val:	Value to write
+ *
+ * Write one configuration byte from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed by one or
+ * more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_write_config_byte(struct i2c_client *client, u8 app_id,
+			      u16 reg, u8 val)
+{
+	return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG, reg,
+				&val, 1, NULL, 0);
+}
+EXPORT_SYMBOL(mma9551_write_config_byte);
+
+/**
+ * mma9551_read_status_byte() - read 1 status byte
+ * @client:	I2C client
+ * @app_id:	Application ID
+ * @reg:	Application register
+ * @val:	Pointer to store value read
+ *
+ * Read one status byte from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed by one or
+ * more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_status_byte(struct i2c_client *client, u8 app_id,
+			     u16 reg, u8 *val)
+{
+	return mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS,
+				reg, NULL, 0, val, 1);
+}
+EXPORT_SYMBOL(mma9551_read_status_byte);
+
+/**
+ * mma9551_read_config_word() - read 1 config word
+ * @client:	I2C client
+ * @app_id:	Application ID
+ * @reg:	Application register
+ * @val:	Pointer to store value read
+ *
+ * Read one configuration word from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed by one or
+ * more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_config_word(struct i2c_client *client, u8 app_id,
+			     u16 reg, u16 *val)
+{
+	int ret;
+	__be16 v;
+
+	ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
+			       reg, NULL, 0, (u8 *)&v, 2);
+	if (ret < 0)
+		return ret;
+
+	*val = be16_to_cpu(v);
+
+	return 0;
+}
+EXPORT_SYMBOL(mma9551_read_config_word);
+
+/**
+ * mma9551_write_config_word() - write 1 config word
+ * @client:	I2C client
+ * @app_id:	Application ID
+ * @reg:	Application register
+ * @val:	Value to write
+ *
+ * Write one configuration word from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed by one or
+ * more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_write_config_word(struct i2c_client *client, u8 app_id,
+			      u16 reg, u16 val)
+{
+	__be16 v = cpu_to_be16(val);
+
+	return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG, reg,
+				(u8 *)&v, 2, NULL, 0);
+}
+EXPORT_SYMBOL(mma9551_write_config_word);
+
+/**
+ * mma9551_read_status_word() - read 1 status word
+ * @client:	I2C client
+ * @app_id:	Application ID
+ * @reg:	Application register
+ * @val:	Pointer to store value read
+ *
+ * Read one status word from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed by one or
+ * more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
+			     u16 reg, u16 *val)
+{
+	int ret;
+	__be16 v;
+
+	ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS,
+			       reg, NULL, 0, (u8 *)&v, 2);
+	if (ret < 0)
+		return ret;
+
+	*val = be16_to_cpu(v);
+
+	return 0;
+}
+EXPORT_SYMBOL(mma9551_read_status_word);
+
+/**
+ * mma9551_read_config_words() - read multiple config words
+ * @client:	I2C client
+ * @app_id:	Application ID
+ * @reg:	Application register
+ * @len:	Length of array to read (in words)
+ * @buf:	Array of words to read
+ *
+ * Read multiple configuration registers (word-sized registers).
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_config_words(struct i2c_client *client, u8 app_id,
+			      u16 reg, u8 len, u16 *buf)
+{
+	int ret, i;
+	__be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS / 2];
+
+	if (len > ARRAY_SIZE(be_buf)) {
+		dev_err(&client->dev, "Invalid buffer size %d\n", len);
+		return -EINVAL;
+	}
+
+	ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
+			       reg, NULL, 0, (u8 *)be_buf, len * sizeof(u16));
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < len; i++)
+		buf[i] = be16_to_cpu(be_buf[i]);
+
+	return 0;
+}
+EXPORT_SYMBOL(mma9551_read_config_words);
+
+/**
+ * mma9551_read_status_words() - read multiple status words
+ * @client:	I2C client
+ * @app_id:	Application ID
+ * @reg:	Application register
+ * @len:	Length of array to read (in words)
+ * @buf:	Array of words to read
+ *
+ * Read multiple status registers (word-sized registers).
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_status_words(struct i2c_client *client, u8 app_id,
+			      u16 reg, u8 len, u16 *buf)
+{
+	int ret, i;
+	__be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS / 2];
+
+	if (len > ARRAY_SIZE(be_buf)) {
+		dev_err(&client->dev, "Invalid buffer size %d\n", len);
+		return -EINVAL;
+	}
+
+	ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS,
+			       reg, NULL, 0, (u8 *)be_buf, len * sizeof(u16));
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < len; i++)
+		buf[i] = be16_to_cpu(be_buf[i]);
+
+	return 0;
+}
+EXPORT_SYMBOL(mma9551_read_status_words);
+
+/**
+ * mma9551_write_config_words() - write multiple config words
+ * @client:	I2C client
+ * @app_id:	Application ID
+ * @reg:	Application register
+ * @len:	Length of array to write (in words)
+ * @buf:	Array of words to write
+ *
+ * Write multiple configuration registers (word-sized registers).
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_write_config_words(struct i2c_client *client, u8 app_id,
+			       u16 reg, u8 len, u16 *buf)
+{
+	int i;
+	__be16 be_buf[(MMA9551_MAX_MAILBOX_DATA_REGS - 1) / 2];
+
+	if (len > ARRAY_SIZE(be_buf)) {
+		dev_err(&client->dev, "Invalid buffer size %d\n", len);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < len; i++)
+		be_buf[i] = cpu_to_be16(buf[i]);
+
+	return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG,
+				reg, (u8 *)be_buf, len * sizeof(u16), NULL, 0);
+}
+EXPORT_SYMBOL(mma9551_write_config_words);
+
+/**
+ * mma9551_update_config_bits() - update bits in register
+ * @client:	I2C client
+ * @app_id:	Application ID
+ * @reg:	Application register
+ * @mask:	Mask for the bits to update
+ * @val:	Value of the bits to update
+ *
+ * Update bits in the given register using a bit mask.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_update_config_bits(struct i2c_client *client, u8 app_id,
+			       u16 reg, u8 mask, u8 val)
+{
+	int ret;
+	u8 tmp, orig;
+
+	ret = mma9551_read_config_byte(client, app_id, reg, &orig);
+	if (ret < 0)
+		return ret;
+
+	tmp = orig & ~mask;
+	tmp |= val & mask;
+
+	if (tmp == orig)
+		return 0;
+
+	return mma9551_write_config_byte(client, app_id, reg, tmp);
+}
+EXPORT_SYMBOL(mma9551_update_config_bits);
+
+/**
+ * mma9551_gpio_config() - configure gpio
+ * @client:	I2C client
+ * @pin:	GPIO pin to configure
+ * @app_id:	Application ID
+ * @bitnum:	Bit number of status register being assigned to the GPIO pin.
+ * @polarity:	The polarity parameter is described in section 6.2.2, page 66,
+ *		of the Software Reference Manual.  Basically, polarity=0 means
+ *		the interrupt line has the same value as the selected bit,
+ *		while polarity=1 means the line is inverted.
+ *
+ * Assign a bit from an application’s status register to a specific GPIO pin.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_gpio_config(struct i2c_client *client, enum mma9551_gpio_pin pin,
+			u8 app_id, u8 bitnum, int polarity)
+{
+	u8 reg, pol_mask, pol_val;
+	int ret;
+
+	if (pin > mma9551_gpio_max) {
+		dev_err(&client->dev, "bad GPIO pin\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Pin 6 is configured by regs 0x00 and 0x01, pin 7 by 0x02 and
+	 * 0x03, and so on.
+	 */
+	reg = pin * 2;
+
+	ret = mma9551_write_config_byte(client, MMA9551_APPID_GPIO,
+					reg, app_id);
+	if (ret < 0) {
+		dev_err(&client->dev, "error setting GPIO app_id\n");
+		return ret;
+	}
+
+	ret = mma9551_write_config_byte(client, MMA9551_APPID_GPIO,
+					reg + 1, bitnum);
+	if (ret < 0) {
+		dev_err(&client->dev, "error setting GPIO bit number\n");
+		return ret;
+	}
+
+	switch (pin) {
+	case mma9551_gpio6:
+		reg = MMA9551_GPIO_POL_LSB;
+		pol_mask = 1 << 6;
+		break;
+	case mma9551_gpio7:
+		reg = MMA9551_GPIO_POL_LSB;
+		pol_mask = 1 << 7;
+		break;
+	case mma9551_gpio8:
+		reg = MMA9551_GPIO_POL_MSB;
+		pol_mask = 1 << 0;
+		break;
+	case mma9551_gpio9:
+		reg = MMA9551_GPIO_POL_MSB;
+		pol_mask = 1 << 1;
+		break;
+	}
+	pol_val = polarity ? pol_mask : 0;
+
+	ret = mma9551_update_config_bits(client, MMA9551_APPID_GPIO, reg,
+					 pol_mask, pol_val);
+	if (ret < 0)
+		dev_err(&client->dev, "error setting GPIO polarity\n");
+
+	return ret;
+}
+EXPORT_SYMBOL(mma9551_gpio_config);
+
+/**
+ * mma9551_read_version() - read device version information
+ * @client:	I2C client
+ *
+ * Read version information and print device id and firmware version.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_version(struct i2c_client *client)
+{
+	struct mma9551_version_info info;
+	int ret;
+
+	ret = mma9551_transfer(client, MMA9551_APPID_VERSION, 0x00, 0x00,
+			       NULL, 0, (u8 *)&info, sizeof(info));
+	if (ret < 0)
+		return ret;
+
+	dev_info(&client->dev, "device ID 0x%x, firmware version %02x.%02x\n",
+		 be32_to_cpu(info.device_id), info.fw_version[0],
+		 info.fw_version[1]);
+
+	return 0;
+}
+EXPORT_SYMBOL(mma9551_read_version);
+
+/**
+ * mma9551_set_device_state() - sets HW power mode
+ * @client:	I2C client
+ * @enable:	Use true to power on device, false to cause the device
+ *		to enter sleep.
+ *
+ * Set power on/off for device using the Sleep/Wake Application.
+ * When enable is true, power on chip and enable doze mode.
+ * When enable is false, enter sleep mode (device remains in the
+ * lowest-power mode).
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_set_device_state(struct i2c_client *client, bool enable)
+{
+	return mma9551_update_config_bits(client, MMA9551_APPID_SLEEP_WAKE,
+					  MMA9551_SLEEP_CFG,
+					  MMA9551_SLEEP_CFG_SNCEN |
+					  MMA9551_SLEEP_CFG_FLEEN |
+					  MMA9551_SLEEP_CFG_SCHEN,
+					  enable ? MMA9551_SLEEP_CFG_SCHEN |
+					  MMA9551_SLEEP_CFG_FLEEN :
+					  MMA9551_SLEEP_CFG_SNCEN);
+}
+EXPORT_SYMBOL(mma9551_set_device_state);
+
+/**
+ * mma9551_set_power_state() - sets runtime PM state
+ * @client:	I2C client
+ * @on:		Use true to power on device, false to power off
+ *
+ * Resume or suspend the device using Runtime PM.
+ * The device will suspend after the autosuspend delay.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_set_power_state(struct i2c_client *client, bool on)
+{
+#ifdef CONFIG_PM
+	int ret;
+
+	if (on)
+		ret = pm_runtime_get_sync(&client->dev);
+	else {
+		pm_runtime_mark_last_busy(&client->dev);
+		ret = pm_runtime_put_autosuspend(&client->dev);
+	}
+
+	if (ret < 0) {
+		dev_err(&client->dev,
+			"failed to change power state to %d\n", on);
+		if (on)
+			pm_runtime_put_noidle(&client->dev);
+
+		return ret;
+	}
+#endif
+
+	return 0;
+}
+EXPORT_SYMBOL(mma9551_set_power_state);
+
+/**
+ * mma9551_sleep() - sleep
+ * @freq:	Application frequency
+ *
+ * Firmware applications run at a certain frequency on the
+ * device. Sleep for one application cycle to make sure the
+ * application had time to run once and initialize set values.
+ */
+void mma9551_sleep(int freq)
+{
+	int sleep_val = 1000 / freq;
+
+	if (sleep_val < 20)
+		usleep_range(sleep_val * 1000, 20000);
+	else
+		msleep_interruptible(sleep_val);
+}
+EXPORT_SYMBOL(mma9551_sleep);
+
+/**
+ * mma9551_read_accel_chan() - read accelerometer channel
+ * @client:	I2C client
+ * @chan:	IIO channel
+ * @val:	Pointer to the accelerometer value read
+ * @val2:	Unused
+ *
+ * Read accelerometer value for the specified channel.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: IIO_VAL_INT on success, negative value on failure.
+ */
+int mma9551_read_accel_chan(struct i2c_client *client,
+			    const struct iio_chan_spec *chan,
+			    int *val, int *val2)
+{
+	u16 reg_addr;
+	s16 raw_accel;
+	int ret;
+
+	switch (chan->channel2) {
+	case IIO_MOD_X:
+		reg_addr = MMA9551_AFE_X_ACCEL_REG;
+		break;
+	case IIO_MOD_Y:
+		reg_addr = MMA9551_AFE_Y_ACCEL_REG;
+		break;
+	case IIO_MOD_Z:
+		reg_addr = MMA9551_AFE_Z_ACCEL_REG;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ret = mma9551_set_power_state(client, true);
+	if (ret < 0)
+		return ret;
+
+	ret = mma9551_read_status_word(client, MMA9551_APPID_AFE,
+				       reg_addr, &raw_accel);
+	if (ret < 0)
+		goto out_poweroff;
+
+	*val = raw_accel;
+
+	ret = IIO_VAL_INT;
+
+out_poweroff:
+	mma9551_set_power_state(client, false);
+	return ret;
+}
+EXPORT_SYMBOL(mma9551_read_accel_chan);
+
+/**
+ * mma9551_read_accel_scale() - read accelerometer scale
+ * @val:	Pointer to the accelerometer scale (int value)
+ * @val2:	Pointer to the accelerometer scale (micro value)
+ *
+ * Read accelerometer scale.
+ *
+ * Returns: IIO_VAL_INT_PLUS_MICRO.
+ */
+int mma9551_read_accel_scale(int *val, int *val2)
+{
+	*val = 0;
+	*val2 = 2440;
+
+	return IIO_VAL_INT_PLUS_MICRO;
+}
+EXPORT_SYMBOL(mma9551_read_accel_scale);
+
+/**
+ * mma9551_app_reset() - reset application
+ * @client:	I2C client
+ * @app_mask:	Application to reset
+ *
+ * Reset the given application (using the Reset/Suspend/Clear
+ * Control Application)
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_app_reset(struct i2c_client *client, u32 app_mask)
+{
+	return mma9551_write_config_byte(client, MMA9551_APPID_RSC,
+					 MMA9551_RSC_RESET +
+					 MMA9551_RSC_OFFSET(app_mask),
+					 MMA9551_RSC_VAL(app_mask));
+}
+EXPORT_SYMBOL(mma9551_app_reset);
+
+MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
+MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MMA955xL sensors core");
diff --git a/drivers/iio/accel/mma9551_core.h b/drivers/iio/accel/mma9551_core.h
new file mode 100644
index 000000000..543454a31
--- /dev/null
+++ b/drivers/iio/accel/mma9551_core.h
@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Common code for Freescale MMA955x Intelligent Sensor Platform drivers
+ * Copyright (c) 2014, Intel Corporation.
+ */
+
+#ifndef _MMA9551_CORE_H_
+#define _MMA9551_CORE_H_
+
+/* Applications IDs */
+#define MMA9551_APPID_VERSION		0x00
+#define MMA9551_APPID_GPIO		0x03
+#define MMA9551_APPID_AFE		0x06
+#define MMA9551_APPID_TILT		0x0B
+#define MMA9551_APPID_SLEEP_WAKE	0x12
+#define MMA9551_APPID_PEDOMETER	        0x15
+#define MMA9551_APPID_RSC		0x17
+#define MMA9551_APPID_NONE		0xff
+
+/* Reset/Suspend/Clear application app masks */
+#define MMA9551_RSC_PED			BIT(21)
+
+#define MMA9551_AUTO_SUSPEND_DELAY_MS	2000
+
+enum mma9551_gpio_pin {
+	mma9551_gpio6 = 0,
+	mma9551_gpio7,
+	mma9551_gpio8,
+	mma9551_gpio9,
+	mma9551_gpio_max = mma9551_gpio9,
+};
+
+#define MMA9551_ACCEL_CHANNEL(axis) {				\
+	.type = IIO_ACCEL,					\
+	.modified = 1,						\
+	.channel2 = axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+}
+
+int mma9551_read_config_byte(struct i2c_client *client, u8 app_id,
+			     u16 reg, u8 *val);
+int mma9551_write_config_byte(struct i2c_client *client, u8 app_id,
+			      u16 reg, u8 val);
+int mma9551_read_status_byte(struct i2c_client *client, u8 app_id,
+			     u16 reg, u8 *val);
+int mma9551_read_config_word(struct i2c_client *client, u8 app_id,
+			     u16 reg, u16 *val);
+int mma9551_write_config_word(struct i2c_client *client, u8 app_id,
+			      u16 reg, u16 val);
+int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
+			     u16 reg, u16 *val);
+int mma9551_read_config_words(struct i2c_client *client, u8 app_id,
+			      u16 reg, u8 len, u16 *buf);
+int mma9551_read_status_words(struct i2c_client *client, u8 app_id,
+			      u16 reg, u8 len, u16 *buf);
+int mma9551_write_config_words(struct i2c_client *client, u8 app_id,
+			       u16 reg, u8 len, u16 *buf);
+int mma9551_update_config_bits(struct i2c_client *client, u8 app_id,
+			       u16 reg, u8 mask, u8 val);
+int mma9551_gpio_config(struct i2c_client *client, enum mma9551_gpio_pin pin,
+			u8 app_id, u8 bitnum, int polarity);
+int mma9551_read_version(struct i2c_client *client);
+int mma9551_set_device_state(struct i2c_client *client, bool enable);
+int mma9551_set_power_state(struct i2c_client *client, bool on);
+void mma9551_sleep(int freq);
+int mma9551_read_accel_chan(struct i2c_client *client,
+			    const struct iio_chan_spec *chan,
+			    int *val, int *val2);
+int mma9551_read_accel_scale(int *val, int *val2);
+int mma9551_app_reset(struct i2c_client *client, u32 app_mask);
+
+#endif /* _MMA9551_CORE_H_ */
diff --git a/drivers/iio/accel/mma9553.c b/drivers/iio/accel/mma9553.c
new file mode 100644
index 000000000..a23a7685d
--- /dev/null
+++ b/drivers/iio/accel/mma9553.c
@@ -0,0 +1,1266 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Freescale MMA9553L Intelligent Pedometer driver
+ * Copyright (c) 2014, Intel Corporation.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/pm_runtime.h>
+#include "mma9551_core.h"
+
+#define MMA9553_DRV_NAME			"mma9553"
+#define MMA9553_IRQ_NAME			"mma9553_event"
+
+/* Pedometer configuration registers (R/W) */
+#define MMA9553_REG_CONF_SLEEPMIN		0x00
+#define MMA9553_REG_CONF_SLEEPMAX		0x02
+#define MMA9553_REG_CONF_SLEEPTHD		0x04
+#define MMA9553_MASK_CONF_WORD			GENMASK(15, 0)
+
+#define MMA9553_REG_CONF_CONF_STEPLEN		0x06
+#define MMA9553_MASK_CONF_CONFIG		BIT(15)
+#define MMA9553_MASK_CONF_ACT_DBCNTM		BIT(14)
+#define MMA9553_MASK_CONF_SLP_DBCNTM		BIT(13)
+#define MMA9553_MASK_CONF_STEPLEN		GENMASK(7, 0)
+
+#define MMA9553_REG_CONF_HEIGHT_WEIGHT		0x08
+#define MMA9553_MASK_CONF_HEIGHT		GENMASK(15, 8)
+#define MMA9553_MASK_CONF_WEIGHT		GENMASK(7, 0)
+
+#define MMA9553_REG_CONF_FILTER			0x0A
+#define MMA9553_MASK_CONF_FILTSTEP		GENMASK(15, 8)
+#define MMA9553_MASK_CONF_MALE			BIT(7)
+#define MMA9553_MASK_CONF_FILTTIME		GENMASK(6, 0)
+
+#define MMA9553_REG_CONF_SPEED_STEP		0x0C
+#define MMA9553_MASK_CONF_SPDPRD		GENMASK(15, 8)
+#define MMA9553_MASK_CONF_STEPCOALESCE		GENMASK(7, 0)
+
+#define MMA9553_REG_CONF_ACTTHD			0x0E
+#define MMA9553_MAX_ACTTHD			GENMASK(15, 0)
+
+/* Pedometer status registers (R-only) */
+#define MMA9553_REG_STATUS			0x00
+#define MMA9553_MASK_STATUS_MRGFL		BIT(15)
+#define MMA9553_MASK_STATUS_SUSPCHG		BIT(14)
+#define MMA9553_MASK_STATUS_STEPCHG		BIT(13)
+#define MMA9553_MASK_STATUS_ACTCHG		BIT(12)
+#define MMA9553_MASK_STATUS_SUSP		BIT(11)
+#define MMA9553_MASK_STATUS_ACTIVITY		GENMASK(10, 8)
+#define MMA9553_MASK_STATUS_VERSION		GENMASK(7, 0)
+
+#define MMA9553_REG_STEPCNT			0x02
+#define MMA9553_REG_DISTANCE			0x04
+#define MMA9553_REG_SPEED			0x06
+#define MMA9553_REG_CALORIES			0x08
+#define MMA9553_REG_SLEEPCNT			0x0A
+
+/* Pedometer events are always mapped to this pin. */
+#define MMA9553_DEFAULT_GPIO_PIN	mma9551_gpio6
+#define MMA9553_DEFAULT_GPIO_POLARITY	0
+
+/* Bitnum used for GPIO configuration = bit number in high status byte */
+#define MMA9553_STATUS_TO_BITNUM(bit)	(ffs(bit) - 9)
+#define MMA9553_MAX_BITNUM		MMA9553_STATUS_TO_BITNUM(BIT(16))
+
+#define MMA9553_DEFAULT_SAMPLE_RATE	30	/* Hz */
+
+/*
+ * The internal activity level must be stable for ACTTHD samples before
+ * ACTIVITY is updated. The ACTIVITY variable contains the current activity
+ * level and is updated every time a step is detected or once a second
+ * if there are no steps.
+ */
+#define MMA9553_ACTIVITY_THD_TO_SEC(thd) ((thd) / MMA9553_DEFAULT_SAMPLE_RATE)
+#define MMA9553_ACTIVITY_SEC_TO_THD(sec) ((sec) * MMA9553_DEFAULT_SAMPLE_RATE)
+
+/*
+ * Autonomously suspend pedometer if acceleration vector magnitude
+ * is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds.
+ */
+#define MMA9553_DEFAULT_SLEEPMIN	3688	/* 0,9 g */
+#define MMA9553_DEFAULT_SLEEPMAX	4508	/* 1,1 g */
+#define MMA9553_DEFAULT_SLEEPTHD	(MMA9553_DEFAULT_SAMPLE_RATE * 30)
+
+#define MMA9553_CONFIG_RETRIES		2
+
+/* Status register - activity field  */
+enum activity_level {
+	ACTIVITY_UNKNOWN,
+	ACTIVITY_REST,
+	ACTIVITY_WALKING,
+	ACTIVITY_JOGGING,
+	ACTIVITY_RUNNING,
+};
+
+static struct mma9553_event_info {
+	enum iio_chan_type type;
+	enum iio_modifier mod;
+	enum iio_event_direction dir;
+} mma9553_events_info[] = {
+	{
+		.type = IIO_STEPS,
+		.mod = IIO_NO_MOD,
+		.dir = IIO_EV_DIR_NONE,
+	},
+	{
+		.type = IIO_ACTIVITY,
+		.mod = IIO_MOD_STILL,
+		.dir = IIO_EV_DIR_RISING,
+	},
+	{
+		.type = IIO_ACTIVITY,
+		.mod = IIO_MOD_STILL,
+		.dir = IIO_EV_DIR_FALLING,
+	},
+	{
+		.type = IIO_ACTIVITY,
+		.mod = IIO_MOD_WALKING,
+		.dir = IIO_EV_DIR_RISING,
+	},
+	{
+		.type = IIO_ACTIVITY,
+		.mod = IIO_MOD_WALKING,
+		.dir = IIO_EV_DIR_FALLING,
+	},
+	{
+		.type = IIO_ACTIVITY,
+		.mod = IIO_MOD_JOGGING,
+		.dir = IIO_EV_DIR_RISING,
+	},
+	{
+		.type = IIO_ACTIVITY,
+		.mod = IIO_MOD_JOGGING,
+		.dir = IIO_EV_DIR_FALLING,
+	},
+	{
+		.type = IIO_ACTIVITY,
+		.mod = IIO_MOD_RUNNING,
+		.dir = IIO_EV_DIR_RISING,
+	},
+	{
+		.type = IIO_ACTIVITY,
+		.mod = IIO_MOD_RUNNING,
+		.dir = IIO_EV_DIR_FALLING,
+	},
+};
+
+#define MMA9553_EVENTS_INFO_SIZE ARRAY_SIZE(mma9553_events_info)
+
+struct mma9553_event {
+	struct mma9553_event_info *info;
+	bool enabled;
+};
+
+struct mma9553_conf_regs {
+	u16 sleepmin;
+	u16 sleepmax;
+	u16 sleepthd;
+	u16 config;
+	u16 height_weight;
+	u16 filter;
+	u16 speed_step;
+	u16 actthd;
+} __packed;
+
+struct mma9553_data {
+	struct i2c_client *client;
+	/*
+	 * 1. Serialize access to HW (requested by mma9551_core API).
+	 * 2. Serialize sequences that power on/off the device and access HW.
+	 */
+	struct mutex mutex;
+	struct mma9553_conf_regs conf;
+	struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE];
+	int num_events;
+	u8 gpio_bitnum;
+	/*
+	 * This is used for all features that depend on step count:
+	 * step count, distance, speed, calories.
+	 */
+	bool stepcnt_enabled;
+	u16 stepcnt;
+	u8 activity;
+	s64 timestamp;
+};
+
+static u8 mma9553_get_bits(u16 val, u16 mask)
+{
+	return (val & mask) >> (ffs(mask) - 1);
+}
+
+static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask)
+{
+	return (current_val & ~mask) | (val << (ffs(mask) - 1));
+}
+
+static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity)
+{
+	switch (activity) {
+	case ACTIVITY_RUNNING:
+		return IIO_MOD_RUNNING;
+	case ACTIVITY_JOGGING:
+		return IIO_MOD_JOGGING;
+	case ACTIVITY_WALKING:
+		return IIO_MOD_WALKING;
+	case ACTIVITY_REST:
+		return IIO_MOD_STILL;
+	case ACTIVITY_UNKNOWN:
+	default:
+		return IIO_NO_MOD;
+	}
+}
+
+static void mma9553_init_events(struct mma9553_data *data)
+{
+	int i;
+
+	data->num_events = MMA9553_EVENTS_INFO_SIZE;
+	for (i = 0; i < data->num_events; i++) {
+		data->events[i].info = &mma9553_events_info[i];
+		data->events[i].enabled = false;
+	}
+}
+
+static struct mma9553_event *mma9553_get_event(struct mma9553_data *data,
+					       enum iio_chan_type type,
+					       enum iio_modifier mod,
+					       enum iio_event_direction dir)
+{
+	int i;
+
+	for (i = 0; i < data->num_events; i++)
+		if (data->events[i].info->type == type &&
+		    data->events[i].info->mod == mod &&
+		    data->events[i].info->dir == dir)
+			return &data->events[i];
+
+	return NULL;
+}
+
+static bool mma9553_is_any_event_enabled(struct mma9553_data *data,
+					 bool check_type,
+					 enum iio_chan_type type)
+{
+	int i;
+
+	for (i = 0; i < data->num_events; i++)
+		if ((check_type && data->events[i].info->type == type &&
+		     data->events[i].enabled) ||
+		     (!check_type && data->events[i].enabled))
+			return true;
+
+	return false;
+}
+
+static int mma9553_set_config(struct mma9553_data *data, u16 reg,
+			      u16 *p_reg_val, u16 val, u16 mask)
+{
+	int ret, retries;
+	u16 reg_val, config;
+
+	reg_val = *p_reg_val;
+	if (val == mma9553_get_bits(reg_val, mask))
+		return 0;
+
+	reg_val = mma9553_set_bits(reg_val, val, mask);
+	ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
+					reg, reg_val);
+	if (ret < 0) {
+		dev_err(&data->client->dev,
+			"error writing config register 0x%x\n", reg);
+		return ret;
+	}
+
+	*p_reg_val = reg_val;
+
+	/* Reinitializes the pedometer with current configuration values */
+	config = mma9553_set_bits(data->conf.config, 1,
+				  MMA9553_MASK_CONF_CONFIG);
+
+	ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
+					MMA9553_REG_CONF_CONF_STEPLEN, config);
+	if (ret < 0) {
+		dev_err(&data->client->dev,
+			"error writing config register 0x%x\n",
+			MMA9553_REG_CONF_CONF_STEPLEN);
+		return ret;
+	}
+
+	retries = MMA9553_CONFIG_RETRIES;
+	do {
+		mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
+		ret = mma9551_read_config_word(data->client,
+					       MMA9551_APPID_PEDOMETER,
+					       MMA9553_REG_CONF_CONF_STEPLEN,
+					       &config);
+		if (ret < 0)
+			return ret;
+	} while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) &&
+		 --retries > 0);
+
+	return 0;
+}
+
+static int mma9553_read_activity_stepcnt(struct mma9553_data *data,
+					 u8 *activity, u16 *stepcnt)
+{
+	u16 buf[2];
+	int ret;
+
+	ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER,
+					MMA9553_REG_STATUS, ARRAY_SIZE(buf),
+					buf);
+	if (ret < 0) {
+		dev_err(&data->client->dev,
+			"error reading status and stepcnt\n");
+		return ret;
+	}
+
+	*activity = mma9553_get_bits(buf[0], MMA9553_MASK_STATUS_ACTIVITY);
+	*stepcnt = buf[1];
+
+	return 0;
+}
+
+static int mma9553_conf_gpio(struct mma9553_data *data)
+{
+	u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER;
+	int ret;
+	struct mma9553_event *ev_step_detect;
+	bool activity_enabled;
+
+	activity_enabled = mma9553_is_any_event_enabled(data, true,
+							IIO_ACTIVITY);
+	ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
+					   IIO_EV_DIR_NONE);
+
+	/*
+	 * If both step detector and activity are enabled, use the MRGFL bit.
+	 * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
+	 */
+	if (activity_enabled && ev_step_detect->enabled)
+		bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
+	else if (ev_step_detect->enabled)
+		bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
+	else if (activity_enabled)
+		bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
+	else			/* Reset */
+		appid = MMA9551_APPID_NONE;
+
+	if (data->gpio_bitnum == bitnum)
+		return 0;
+
+	/* Save initial values for activity and stepcnt */
+	if (activity_enabled || ev_step_detect->enabled) {
+		ret = mma9553_read_activity_stepcnt(data, &data->activity,
+						    &data->stepcnt);
+		if (ret < 0)
+			return ret;
+	}
+
+	ret = mma9551_gpio_config(data->client, MMA9553_DEFAULT_GPIO_PIN, appid,
+				  bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
+	if (ret < 0)
+		return ret;
+	data->gpio_bitnum = bitnum;
+
+	return 0;
+}
+
+static int mma9553_init(struct mma9553_data *data)
+{
+	int ret;
+
+	ret = mma9551_read_version(data->client);
+	if (ret)
+		return ret;
+
+	/*
+	 * Read all the pedometer configuration registers. This is used as
+	 * a device identification command to differentiate the MMA9553L
+	 * from the MMA9550L.
+	 */
+	ret = mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
+					MMA9553_REG_CONF_SLEEPMIN,
+					sizeof(data->conf) / sizeof(u16),
+					(u16 *)&data->conf);
+	if (ret < 0) {
+		dev_err(&data->client->dev,
+			"failed to read configuration registers\n");
+		return ret;
+	}
+
+	/* Reset GPIO */
+	data->gpio_bitnum = MMA9553_MAX_BITNUM;
+	ret = mma9553_conf_gpio(data);
+	if (ret < 0)
+		return ret;
+
+	ret = mma9551_app_reset(data->client, MMA9551_RSC_PED);
+	if (ret < 0)
+		return ret;
+
+	/* Init config registers */
+	data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
+	data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
+	data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
+	data->conf.config = mma9553_set_bits(data->conf.config, 1,
+					     MMA9553_MASK_CONF_CONFIG);
+	/*
+	 * Clear the activity debounce counter when the activity level changes,
+	 * so that the confidence level applies for any activity level.
+	 */
+	data->conf.config = mma9553_set_bits(data->conf.config, 1,
+					     MMA9553_MASK_CONF_ACT_DBCNTM);
+	ret = mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
+					 MMA9553_REG_CONF_SLEEPMIN,
+					 sizeof(data->conf) / sizeof(u16),
+					 (u16 *)&data->conf);
+	if (ret < 0) {
+		dev_err(&data->client->dev,
+			"failed to write configuration registers\n");
+		return ret;
+	}
+
+	return mma9551_set_device_state(data->client, true);
+}
+
+static int mma9553_read_status_word(struct mma9553_data *data, u16 reg,
+				    u16 *tmp)
+{
+	bool powered_on;
+	int ret;
+
+	/*
+	 * The HW only counts steps and other dependent
+	 * parameters (speed, distance, calories, activity)
+	 * if power is on (from enabling an event or the
+	 * step counter).
+	 */
+	powered_on = mma9553_is_any_event_enabled(data, false, 0) ||
+		     data->stepcnt_enabled;
+	if (!powered_on) {
+		dev_err(&data->client->dev, "No channels enabled\n");
+		return -EINVAL;
+	}
+
+	mutex_lock(&data->mutex);
+	ret = mma9551_read_status_word(data->client, MMA9551_APPID_PEDOMETER,
+				       reg, tmp);
+	mutex_unlock(&data->mutex);
+	return ret;
+}
+
+static int mma9553_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct mma9553_data *data = iio_priv(indio_dev);
+	int ret;
+	u16 tmp;
+	u8 activity;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_PROCESSED:
+		switch (chan->type) {
+		case IIO_STEPS:
+			ret = mma9553_read_status_word(data,
+						       MMA9553_REG_STEPCNT,
+						       &tmp);
+			if (ret < 0)
+				return ret;
+			*val = tmp;
+			return IIO_VAL_INT;
+		case IIO_DISTANCE:
+			ret = mma9553_read_status_word(data,
+						       MMA9553_REG_DISTANCE,
+						       &tmp);
+			if (ret < 0)
+				return ret;
+			*val = tmp;
+			return IIO_VAL_INT;
+		case IIO_ACTIVITY:
+			ret = mma9553_read_status_word(data,
+						       MMA9553_REG_STATUS,
+						       &tmp);
+			if (ret < 0)
+				return ret;
+
+			activity =
+			    mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY);
+
+			/*
+			 * The device does not support confidence value levels,
+			 * so we will always have 100% for current activity and
+			 * 0% for the others.
+			 */
+			if (chan->channel2 == mma9553_activity_to_mod(activity))
+				*val = 100;
+			else
+				*val = 0;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_RAW:
+		switch (chan->type) {
+		case IIO_VELOCITY:	/* m/h */
+			if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
+				return -EINVAL;
+			ret = mma9553_read_status_word(data,
+						       MMA9553_REG_SPEED,
+						       &tmp);
+			if (ret < 0)
+				return ret;
+			*val = tmp;
+			return IIO_VAL_INT;
+		case IIO_ENERGY:	/* Cal or kcal */
+			ret = mma9553_read_status_word(data,
+						       MMA9553_REG_CALORIES,
+						       &tmp);
+			if (ret < 0)
+				return ret;
+			*val = tmp;
+			return IIO_VAL_INT;
+		case IIO_ACCEL:
+			mutex_lock(&data->mutex);
+			ret = mma9551_read_accel_chan(data->client,
+						      chan, val, val2);
+			mutex_unlock(&data->mutex);
+			return ret;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_VELOCITY:	/* m/h to m/s */
+			if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
+				return -EINVAL;
+			*val = 0;
+			*val2 = 277;	/* 0.000277 */
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_ENERGY:	/* Cal or kcal to J */
+			*val = 4184;
+			return IIO_VAL_INT;
+		case IIO_ACCEL:
+			return mma9551_read_accel_scale(val, val2);
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_ENABLE:
+		*val = data->stepcnt_enabled;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_CALIBHEIGHT:
+		tmp = mma9553_get_bits(data->conf.height_weight,
+				       MMA9553_MASK_CONF_HEIGHT);
+		*val = tmp / 100;	/* cm to m */
+		*val2 = (tmp % 100) * 10000;
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_CALIBWEIGHT:
+		*val = mma9553_get_bits(data->conf.height_weight,
+					MMA9553_MASK_CONF_WEIGHT);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_DEBOUNCE_COUNT:
+		switch (chan->type) {
+		case IIO_STEPS:
+			*val = mma9553_get_bits(data->conf.filter,
+						MMA9553_MASK_CONF_FILTSTEP);
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_DEBOUNCE_TIME:
+		switch (chan->type) {
+		case IIO_STEPS:
+			*val = mma9553_get_bits(data->conf.filter,
+						MMA9553_MASK_CONF_FILTTIME);
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_INT_TIME:
+		switch (chan->type) {
+		case IIO_VELOCITY:
+			if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
+				return -EINVAL;
+			*val = mma9553_get_bits(data->conf.speed_step,
+						MMA9553_MASK_CONF_SPDPRD);
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma9553_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	struct mma9553_data *data = iio_priv(indio_dev);
+	int ret, tmp;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_ENABLE:
+		if (data->stepcnt_enabled == !!val)
+			return 0;
+		mutex_lock(&data->mutex);
+		ret = mma9551_set_power_state(data->client, val);
+		if (ret < 0) {
+			mutex_unlock(&data->mutex);
+			return ret;
+		}
+		data->stepcnt_enabled = val;
+		mutex_unlock(&data->mutex);
+		return 0;
+	case IIO_CHAN_INFO_CALIBHEIGHT:
+		/* m to cm */
+		tmp = val * 100 + val2 / 10000;
+		if (tmp < 0 || tmp > 255)
+			return -EINVAL;
+		mutex_lock(&data->mutex);
+		ret = mma9553_set_config(data,
+					 MMA9553_REG_CONF_HEIGHT_WEIGHT,
+					 &data->conf.height_weight,
+					 tmp, MMA9553_MASK_CONF_HEIGHT);
+		mutex_unlock(&data->mutex);
+		return ret;
+	case IIO_CHAN_INFO_CALIBWEIGHT:
+		if (val < 0 || val > 255)
+			return -EINVAL;
+		mutex_lock(&data->mutex);
+		ret = mma9553_set_config(data,
+					 MMA9553_REG_CONF_HEIGHT_WEIGHT,
+					 &data->conf.height_weight,
+					 val, MMA9553_MASK_CONF_WEIGHT);
+		mutex_unlock(&data->mutex);
+		return ret;
+	case IIO_CHAN_INFO_DEBOUNCE_COUNT:
+		switch (chan->type) {
+		case IIO_STEPS:
+			/*
+			 * Set to 0 to disable step filtering. If the value
+			 * specified is greater than 6, then 6 will be used.
+			 */
+			if (val < 0)
+				return -EINVAL;
+			if (val > 6)
+				val = 6;
+			mutex_lock(&data->mutex);
+			ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
+						 &data->conf.filter, val,
+						 MMA9553_MASK_CONF_FILTSTEP);
+			mutex_unlock(&data->mutex);
+			return ret;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_DEBOUNCE_TIME:
+		switch (chan->type) {
+		case IIO_STEPS:
+			if (val < 0 || val > 127)
+				return -EINVAL;
+			mutex_lock(&data->mutex);
+			ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
+						 &data->conf.filter, val,
+						 MMA9553_MASK_CONF_FILTTIME);
+			mutex_unlock(&data->mutex);
+			return ret;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_INT_TIME:
+		switch (chan->type) {
+		case IIO_VELOCITY:
+			if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
+				return -EINVAL;
+			/*
+			 * If set to a value greater than 5, then 5 will be
+			 * used. Warning: Do not set SPDPRD to 0 or 1 as
+			 * this may cause undesirable behavior.
+			 */
+			if (val < 2)
+				return -EINVAL;
+			if (val > 5)
+				val = 5;
+			mutex_lock(&data->mutex);
+			ret = mma9553_set_config(data,
+						 MMA9553_REG_CONF_SPEED_STEP,
+						 &data->conf.speed_step, val,
+						 MMA9553_MASK_CONF_SPDPRD);
+			mutex_unlock(&data->mutex);
+			return ret;
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma9553_read_event_config(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir)
+{
+	struct mma9553_data *data = iio_priv(indio_dev);
+	struct mma9553_event *event;
+
+	event = mma9553_get_event(data, chan->type, chan->channel2, dir);
+	if (!event)
+		return -EINVAL;
+
+	return event->enabled;
+}
+
+static int mma9553_write_event_config(struct iio_dev *indio_dev,
+				      const struct iio_chan_spec *chan,
+				      enum iio_event_type type,
+				      enum iio_event_direction dir, int state)
+{
+	struct mma9553_data *data = iio_priv(indio_dev);
+	struct mma9553_event *event;
+	int ret;
+
+	event = mma9553_get_event(data, chan->type, chan->channel2, dir);
+	if (!event)
+		return -EINVAL;
+
+	if (event->enabled == state)
+		return 0;
+
+	mutex_lock(&data->mutex);
+
+	ret = mma9551_set_power_state(data->client, state);
+	if (ret < 0)
+		goto err_out;
+	event->enabled = state;
+
+	ret = mma9553_conf_gpio(data);
+	if (ret < 0)
+		goto err_conf_gpio;
+
+	mutex_unlock(&data->mutex);
+
+	return 0;
+
+err_conf_gpio:
+	if (state) {
+		event->enabled = false;
+		mma9551_set_power_state(data->client, false);
+	}
+err_out:
+	mutex_unlock(&data->mutex);
+	return ret;
+}
+
+static int mma9553_read_event_value(struct iio_dev *indio_dev,
+				    const struct iio_chan_spec *chan,
+				    enum iio_event_type type,
+				    enum iio_event_direction dir,
+				    enum iio_event_info info,
+				    int *val, int *val2)
+{
+	struct mma9553_data *data = iio_priv(indio_dev);
+
+	*val2 = 0;
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		switch (chan->type) {
+		case IIO_STEPS:
+			*val = mma9553_get_bits(data->conf.speed_step,
+						MMA9553_MASK_CONF_STEPCOALESCE);
+			return IIO_VAL_INT;
+		case IIO_ACTIVITY:
+			/*
+			 * The device does not support confidence value levels.
+			 * We set an average of 50%.
+			 */
+			*val = 50;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	case IIO_EV_INFO_PERIOD:
+		switch (chan->type) {
+		case IIO_ACTIVITY:
+			*val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd);
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma9553_write_event_value(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir,
+				     enum iio_event_info info,
+				     int val, int val2)
+{
+	struct mma9553_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		switch (chan->type) {
+		case IIO_STEPS:
+			if (val < 0 || val > 255)
+				return -EINVAL;
+			mutex_lock(&data->mutex);
+			ret = mma9553_set_config(data,
+						MMA9553_REG_CONF_SPEED_STEP,
+						&data->conf.speed_step, val,
+						MMA9553_MASK_CONF_STEPCOALESCE);
+			mutex_unlock(&data->mutex);
+			return ret;
+		default:
+			return -EINVAL;
+		}
+	case IIO_EV_INFO_PERIOD:
+		switch (chan->type) {
+		case IIO_ACTIVITY:
+			if (val < 0 || val > MMA9553_ACTIVITY_THD_TO_SEC(
+			    MMA9553_MAX_ACTTHD))
+				return -EINVAL;
+			mutex_lock(&data->mutex);
+			ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD,
+						 &data->conf.actthd,
+						 MMA9553_ACTIVITY_SEC_TO_THD
+						 (val), MMA9553_MASK_CONF_WORD);
+			mutex_unlock(&data->mutex);
+			return ret;
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
+					const struct iio_chan_spec *chan)
+{
+	struct mma9553_data *data = iio_priv(indio_dev);
+	u8 gender;
+
+	gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
+	/*
+	 * HW expects 0 for female and 1 for male,
+	 * while iio index is 0 for male and 1 for female.
+	 */
+	return !gender;
+}
+
+static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev,
+					const struct iio_chan_spec *chan,
+					unsigned int mode)
+{
+	struct mma9553_data *data = iio_priv(indio_dev);
+	u8 gender = !mode;
+	int ret;
+
+	if ((mode != 0) && (mode != 1))
+		return -EINVAL;
+	mutex_lock(&data->mutex);
+	ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
+				 &data->conf.filter, gender,
+				 MMA9553_MASK_CONF_MALE);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static const struct iio_event_spec mma9553_step_event = {
+	.type = IIO_EV_TYPE_CHANGE,
+	.dir = IIO_EV_DIR_NONE,
+	.mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
+};
+
+static const struct iio_event_spec mma9553_activity_events[] = {
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_RISING,
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+				 BIT(IIO_EV_INFO_VALUE) |
+				 BIT(IIO_EV_INFO_PERIOD),
+	 },
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_FALLING,
+		.mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+				 BIT(IIO_EV_INFO_VALUE) |
+				 BIT(IIO_EV_INFO_PERIOD),
+	},
+};
+
+static const char * const mma9553_calibgender_modes[] = { "male", "female" };
+
+static const struct iio_enum mma9553_calibgender_enum = {
+	.items = mma9553_calibgender_modes,
+	.num_items = ARRAY_SIZE(mma9553_calibgender_modes),
+	.get = mma9553_get_calibgender_mode,
+	.set = mma9553_set_calibgender_mode,
+};
+
+static const struct iio_chan_spec_ext_info mma9553_ext_info[] = {
+	IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
+	IIO_ENUM_AVAILABLE("calibgender", &mma9553_calibgender_enum),
+	{},
+};
+
+#define MMA9553_PEDOMETER_CHANNEL(_type, _mask) {		\
+	.type = _type,						\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE)      |	\
+			      BIT(IIO_CHAN_INFO_CALIBHEIGHT) |	\
+			      _mask,				\
+	.ext_info = mma9553_ext_info,				\
+}
+
+#define MMA9553_ACTIVITY_CHANNEL(_chan2) {				\
+	.type = IIO_ACTIVITY,						\
+	.modified = 1,							\
+	.channel2 = _chan2,						\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),		\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT) |	\
+				    BIT(IIO_CHAN_INFO_ENABLE),		\
+	.event_spec = mma9553_activity_events,				\
+	.num_event_specs = ARRAY_SIZE(mma9553_activity_events),		\
+	.ext_info = mma9553_ext_info,					\
+}
+
+static const struct iio_chan_spec mma9553_channels[] = {
+	MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
+	MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
+	MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
+
+	{
+		.type = IIO_STEPS,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+				     BIT(IIO_CHAN_INFO_ENABLE) |
+				     BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT) |
+				     BIT(IIO_CHAN_INFO_DEBOUNCE_TIME),
+		.event_spec = &mma9553_step_event,
+		.num_event_specs = 1,
+	},
+
+	MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
+	{
+		.type = IIO_VELOCITY,
+		.modified = 1,
+		.channel2 = IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE) |
+				      BIT(IIO_CHAN_INFO_INT_TIME) |
+				      BIT(IIO_CHAN_INFO_ENABLE),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT),
+		.ext_info = mma9553_ext_info,
+	},
+	MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) |
+				  BIT(IIO_CHAN_INFO_SCALE) |
+				  BIT(IIO_CHAN_INFO_CALIBWEIGHT)),
+
+	MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING),
+	MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING),
+	MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING),
+	MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL),
+};
+
+static const struct iio_info mma9553_info = {
+	.read_raw = mma9553_read_raw,
+	.write_raw = mma9553_write_raw,
+	.read_event_config = mma9553_read_event_config,
+	.write_event_config = mma9553_write_event_config,
+	.read_event_value = mma9553_read_event_value,
+	.write_event_value = mma9553_write_event_value,
+};
+
+static irqreturn_t mma9553_irq_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct mma9553_data *data = iio_priv(indio_dev);
+
+	data->timestamp = iio_get_time_ns(indio_dev);
+	/*
+	 * Since we only configure the interrupt pin when an
+	 * event is enabled, we are sure we have at least
+	 * one event enabled at this point.
+	 */
+	return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t mma9553_event_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct mma9553_data *data = iio_priv(indio_dev);
+	u16 stepcnt;
+	u8 activity;
+	struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect;
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt);
+	if (ret < 0) {
+		mutex_unlock(&data->mutex);
+		return IRQ_HANDLED;
+	}
+
+	ev_prev_activity = mma9553_get_event(data, IIO_ACTIVITY,
+					     mma9553_activity_to_mod(
+					     data->activity),
+					     IIO_EV_DIR_FALLING);
+	ev_activity = mma9553_get_event(data, IIO_ACTIVITY,
+					mma9553_activity_to_mod(activity),
+					IIO_EV_DIR_RISING);
+	ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
+					   IIO_EV_DIR_NONE);
+
+	if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
+		data->stepcnt = stepcnt;
+		iio_push_event(indio_dev,
+			       IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
+					      IIO_EV_DIR_NONE,
+					      IIO_EV_TYPE_CHANGE, 0, 0, 0),
+			       data->timestamp);
+	}
+
+	if (activity != data->activity) {
+		data->activity = activity;
+		/* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */
+		if (ev_prev_activity && ev_prev_activity->enabled)
+			iio_push_event(indio_dev,
+				       IIO_EVENT_CODE(IIO_ACTIVITY, 0,
+						    ev_prev_activity->info->mod,
+						    IIO_EV_DIR_FALLING,
+						    IIO_EV_TYPE_THRESH, 0, 0,
+						    0),
+				       data->timestamp);
+
+		if (ev_activity && ev_activity->enabled)
+			iio_push_event(indio_dev,
+				       IIO_EVENT_CODE(IIO_ACTIVITY, 0,
+						      ev_activity->info->mod,
+						      IIO_EV_DIR_RISING,
+						      IIO_EV_TYPE_THRESH, 0, 0,
+						      0),
+				       data->timestamp);
+	}
+	mutex_unlock(&data->mutex);
+
+	return IRQ_HANDLED;
+}
+
+static const char *mma9553_match_acpi_device(struct device *dev)
+{
+	const struct acpi_device_id *id;
+
+	id = acpi_match_device(dev->driver->acpi_match_table, dev);
+	if (!id)
+		return NULL;
+
+	return dev_name(dev);
+}
+
+static int mma9553_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct mma9553_data *data;
+	struct iio_dev *indio_dev;
+	const char *name = NULL;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	data->client = client;
+
+	if (id)
+		name = id->name;
+	else if (ACPI_HANDLE(&client->dev))
+		name = mma9553_match_acpi_device(&client->dev);
+	else
+		return -ENOSYS;
+
+	mutex_init(&data->mutex);
+	mma9553_init_events(data);
+
+	ret = mma9553_init(data);
+	if (ret < 0)
+		return ret;
+
+	indio_dev->channels = mma9553_channels;
+	indio_dev->num_channels = ARRAY_SIZE(mma9553_channels);
+	indio_dev->name = name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &mma9553_info;
+
+	if (client->irq > 0) {
+		ret = devm_request_threaded_irq(&client->dev, client->irq,
+						mma9553_irq_handler,
+						mma9553_event_handler,
+						IRQF_TRIGGER_RISING,
+						MMA9553_IRQ_NAME, indio_dev);
+		if (ret < 0) {
+			dev_err(&client->dev, "request irq %d failed\n",
+				client->irq);
+			goto out_poweroff;
+		}
+	}
+
+	ret = pm_runtime_set_active(&client->dev);
+	if (ret < 0)
+		goto out_poweroff;
+
+	pm_runtime_enable(&client->dev);
+	pm_runtime_set_autosuspend_delay(&client->dev,
+					 MMA9551_AUTO_SUSPEND_DELAY_MS);
+	pm_runtime_use_autosuspend(&client->dev);
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "unable to register iio device\n");
+		goto err_pm_cleanup;
+	}
+
+	dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
+	return 0;
+
+err_pm_cleanup:
+	pm_runtime_dont_use_autosuspend(&client->dev);
+	pm_runtime_disable(&client->dev);
+out_poweroff:
+	mma9551_set_device_state(client, false);
+	return ret;
+}
+
+static int mma9553_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct mma9553_data *data = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	pm_runtime_disable(&client->dev);
+	pm_runtime_set_suspended(&client->dev);
+	pm_runtime_put_noidle(&client->dev);
+
+	mutex_lock(&data->mutex);
+	mma9551_set_device_state(data->client, false);
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int mma9553_runtime_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct mma9553_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = mma9551_set_device_state(data->client, false);
+	mutex_unlock(&data->mutex);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "powering off device failed\n");
+		return -EAGAIN;
+	}
+
+	return 0;
+}
+
+static int mma9553_runtime_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct mma9553_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = mma9551_set_device_state(data->client, true);
+	if (ret < 0)
+		return ret;
+
+	mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
+
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int mma9553_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct mma9553_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = mma9551_set_device_state(data->client, false);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static int mma9553_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+	struct mma9553_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	ret = mma9551_set_device_state(data->client, true);
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+#endif
+
+static const struct dev_pm_ops mma9553_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
+	SET_RUNTIME_PM_OPS(mma9553_runtime_suspend,
+			   mma9553_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id mma9553_acpi_match[] = {
+	{"MMA9553", 0},
+	{},
+};
+
+MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match);
+
+static const struct i2c_device_id mma9553_id[] = {
+	{"mma9553", 0},
+	{},
+};
+
+MODULE_DEVICE_TABLE(i2c, mma9553_id);
+
+static struct i2c_driver mma9553_driver = {
+	.driver = {
+		   .name = MMA9553_DRV_NAME,
+		   .acpi_match_table = ACPI_PTR(mma9553_acpi_match),
+		   .pm = &mma9553_pm_ops,
+		   },
+	.probe = mma9553_probe,
+	.remove = mma9553_remove,
+	.id_table = mma9553_id,
+};
+
+module_i2c_driver(mma9553_driver);
+
+MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MMA9553L pedometer platform driver");
diff --git a/drivers/iio/accel/mxc4005.c b/drivers/iio/accel/mxc4005.c
new file mode 100644
index 000000000..ecd9d8ad5
--- /dev/null
+++ b/drivers/iio/accel/mxc4005.c
@@ -0,0 +1,505 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 3-axis accelerometer driver for MXC4005XC Memsic sensor
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/acpi.h>
+#include <linux/regmap.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+
+#define MXC4005_DRV_NAME		"mxc4005"
+#define MXC4005_IRQ_NAME		"mxc4005_event"
+#define MXC4005_REGMAP_NAME		"mxc4005_regmap"
+
+#define MXC4005_REG_XOUT_UPPER		0x03
+#define MXC4005_REG_XOUT_LOWER		0x04
+#define MXC4005_REG_YOUT_UPPER		0x05
+#define MXC4005_REG_YOUT_LOWER		0x06
+#define MXC4005_REG_ZOUT_UPPER		0x07
+#define MXC4005_REG_ZOUT_LOWER		0x08
+
+#define MXC4005_REG_INT_MASK1		0x0B
+#define MXC4005_REG_INT_MASK1_BIT_DRDYE	0x01
+
+#define MXC4005_REG_INT_CLR1		0x01
+#define MXC4005_REG_INT_CLR1_BIT_DRDYC	0x01
+
+#define MXC4005_REG_CONTROL		0x0D
+#define MXC4005_REG_CONTROL_MASK_FSR	GENMASK(6, 5)
+#define MXC4005_CONTROL_FSR_SHIFT	5
+
+#define MXC4005_REG_DEVICE_ID		0x0E
+
+enum mxc4005_axis {
+	AXIS_X,
+	AXIS_Y,
+	AXIS_Z,
+};
+
+enum mxc4005_range {
+	MXC4005_RANGE_2G,
+	MXC4005_RANGE_4G,
+	MXC4005_RANGE_8G,
+};
+
+struct mxc4005_data {
+	struct device *dev;
+	struct mutex mutex;
+	struct regmap *regmap;
+	struct iio_trigger *dready_trig;
+	/* Ensure timestamp is naturally aligned */
+	struct {
+		__be16 chans[3];
+		s64 timestamp __aligned(8);
+	} scan;
+	bool trigger_enabled;
+};
+
+/*
+ * MXC4005 can operate in the following ranges:
+ * +/- 2G, 4G, 8G (the default +/-2G)
+ *
+ * (2 + 2) * 9.81 / (2^12 - 1) = 0.009582
+ * (4 + 4) * 9.81 / (2^12 - 1) = 0.019164
+ * (8 + 8) * 9.81 / (2^12 - 1) = 0.038329
+ */
+static const struct {
+	u8 range;
+	int scale;
+} mxc4005_scale_table[] = {
+	{MXC4005_RANGE_2G, 9582},
+	{MXC4005_RANGE_4G, 19164},
+	{MXC4005_RANGE_8G, 38329},
+};
+
+
+static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019164 0.038329");
+
+static struct attribute *mxc4005_attributes[] = {
+	&iio_const_attr_in_accel_scale_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group mxc4005_attrs_group = {
+	.attrs = mxc4005_attributes,
+};
+
+static bool mxc4005_is_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case MXC4005_REG_XOUT_UPPER:
+	case MXC4005_REG_XOUT_LOWER:
+	case MXC4005_REG_YOUT_UPPER:
+	case MXC4005_REG_YOUT_LOWER:
+	case MXC4005_REG_ZOUT_UPPER:
+	case MXC4005_REG_ZOUT_LOWER:
+	case MXC4005_REG_DEVICE_ID:
+	case MXC4005_REG_CONTROL:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool mxc4005_is_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case MXC4005_REG_INT_CLR1:
+	case MXC4005_REG_INT_MASK1:
+	case MXC4005_REG_CONTROL:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config mxc4005_regmap_config = {
+	.name = MXC4005_REGMAP_NAME,
+
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = MXC4005_REG_DEVICE_ID,
+
+	.readable_reg = mxc4005_is_readable_reg,
+	.writeable_reg = mxc4005_is_writeable_reg,
+};
+
+static int mxc4005_read_xyz(struct mxc4005_data *data)
+{
+	int ret;
+
+	ret = regmap_bulk_read(data->regmap, MXC4005_REG_XOUT_UPPER,
+			       data->scan.chans, sizeof(data->scan.chans));
+	if (ret < 0) {
+		dev_err(data->dev, "failed to read axes\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int mxc4005_read_axis(struct mxc4005_data *data,
+			     unsigned int addr)
+{
+	__be16 reg;
+	int ret;
+
+	ret = regmap_bulk_read(data->regmap, addr, &reg, sizeof(reg));
+	if (ret < 0) {
+		dev_err(data->dev, "failed to read reg %02x\n", addr);
+		return ret;
+	}
+
+	return be16_to_cpu(reg);
+}
+
+static int mxc4005_read_scale(struct mxc4005_data *data)
+{
+	unsigned int reg;
+	int ret;
+	int i;
+
+	ret = regmap_read(data->regmap, MXC4005_REG_CONTROL, &reg);
+	if (ret < 0) {
+		dev_err(data->dev, "failed to read reg_control\n");
+		return ret;
+	}
+
+	i = reg >> MXC4005_CONTROL_FSR_SHIFT;
+
+	if (i < 0 || i >= ARRAY_SIZE(mxc4005_scale_table))
+		return -EINVAL;
+
+	return mxc4005_scale_table[i].scale;
+}
+
+static int mxc4005_set_scale(struct mxc4005_data *data, int val)
+{
+	unsigned int reg;
+	int i;
+	int ret;
+
+	for (i = 0; i < ARRAY_SIZE(mxc4005_scale_table); i++) {
+		if (mxc4005_scale_table[i].scale == val) {
+			reg = i << MXC4005_CONTROL_FSR_SHIFT;
+			ret = regmap_update_bits(data->regmap,
+						 MXC4005_REG_CONTROL,
+						 MXC4005_REG_CONTROL_MASK_FSR,
+						 reg);
+			if (ret < 0)
+				dev_err(data->dev,
+					"failed to write reg_control\n");
+			return ret;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int mxc4005_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct mxc4005_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			if (iio_buffer_enabled(indio_dev))
+				return -EBUSY;
+
+			ret = mxc4005_read_axis(data, chan->address);
+			if (ret < 0)
+				return ret;
+			*val = sign_extend32(ret >> chan->scan_type.shift,
+					     chan->scan_type.realbits - 1);
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SCALE:
+		ret = mxc4005_read_scale(data);
+		if (ret < 0)
+			return ret;
+
+		*val = 0;
+		*val2 = ret;
+		return IIO_VAL_INT_PLUS_MICRO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mxc4005_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	struct mxc4005_data *data = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		if (val != 0)
+			return -EINVAL;
+
+		return mxc4005_set_scale(data, val2);
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info mxc4005_info = {
+	.read_raw	= mxc4005_read_raw,
+	.write_raw	= mxc4005_write_raw,
+	.attrs		= &mxc4005_attrs_group,
+};
+
+static const unsigned long mxc4005_scan_masks[] = {
+	BIT(AXIS_X) | BIT(AXIS_Y) | BIT(AXIS_Z),
+	0
+};
+
+#define MXC4005_CHANNEL(_axis, _addr) {				\
+	.type = IIO_ACCEL,					\
+	.modified = 1,						\
+	.channel2 = IIO_MOD_##_axis,				\
+	.address = _addr,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+	.scan_index = AXIS_##_axis,				\
+	.scan_type = {						\
+		.sign = 's',					\
+		.realbits = 12,					\
+		.storagebits = 16,				\
+		.shift = 4,					\
+		.endianness = IIO_BE,				\
+	},							\
+}
+
+static const struct iio_chan_spec mxc4005_channels[] = {
+	MXC4005_CHANNEL(X, MXC4005_REG_XOUT_UPPER),
+	MXC4005_CHANNEL(Y, MXC4005_REG_YOUT_UPPER),
+	MXC4005_CHANNEL(Z, MXC4005_REG_ZOUT_UPPER),
+	IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static irqreturn_t mxc4005_trigger_handler(int irq, void *private)
+{
+	struct iio_poll_func *pf = private;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct mxc4005_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = mxc4005_read_xyz(data);
+	if (ret < 0)
+		goto err;
+
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+					   pf->timestamp);
+
+err:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static int mxc4005_clr_intr(struct mxc4005_data *data)
+{
+	int ret;
+
+	/* clear interrupt */
+	ret = regmap_write(data->regmap, MXC4005_REG_INT_CLR1,
+			   MXC4005_REG_INT_CLR1_BIT_DRDYC);
+	if (ret < 0) {
+		dev_err(data->dev, "failed to write to reg_int_clr1\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int mxc4005_set_trigger_state(struct iio_trigger *trig,
+				     bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct mxc4005_data *data = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&data->mutex);
+	if (state) {
+		ret = regmap_write(data->regmap, MXC4005_REG_INT_MASK1,
+				   MXC4005_REG_INT_MASK1_BIT_DRDYE);
+	} else {
+		ret = regmap_write(data->regmap, MXC4005_REG_INT_MASK1,
+				   ~MXC4005_REG_INT_MASK1_BIT_DRDYE);
+	}
+
+	if (ret < 0) {
+		mutex_unlock(&data->mutex);
+		dev_err(data->dev, "failed to update reg_int_mask1");
+		return ret;
+	}
+
+	data->trigger_enabled = state;
+	mutex_unlock(&data->mutex);
+
+	return 0;
+}
+
+static int mxc4005_trigger_try_reen(struct iio_trigger *trig)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct mxc4005_data *data = iio_priv(indio_dev);
+
+	if (!data->dready_trig)
+		return 0;
+
+	return mxc4005_clr_intr(data);
+}
+
+static const struct iio_trigger_ops mxc4005_trigger_ops = {
+	.set_trigger_state = mxc4005_set_trigger_state,
+	.try_reenable = mxc4005_trigger_try_reen,
+};
+
+static int mxc4005_chip_init(struct mxc4005_data *data)
+{
+	int ret;
+	unsigned int reg;
+
+	ret = regmap_read(data->regmap, MXC4005_REG_DEVICE_ID, &reg);
+	if (ret < 0) {
+		dev_err(data->dev, "failed to read chip id\n");
+		return ret;
+	}
+
+	dev_dbg(data->dev, "MXC4005 chip id %02x\n", reg);
+
+	return 0;
+}
+
+static int mxc4005_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct mxc4005_data *data;
+	struct iio_dev *indio_dev;
+	struct regmap *regmap;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	regmap = devm_regmap_init_i2c(client, &mxc4005_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(&client->dev, "failed to initialize regmap\n");
+		return PTR_ERR(regmap);
+	}
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	data->dev = &client->dev;
+	data->regmap = regmap;
+
+	ret = mxc4005_chip_init(data);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to initialize chip\n");
+		return ret;
+	}
+
+	mutex_init(&data->mutex);
+
+	indio_dev->channels = mxc4005_channels;
+	indio_dev->num_channels = ARRAY_SIZE(mxc4005_channels);
+	indio_dev->available_scan_masks = mxc4005_scan_masks;
+	indio_dev->name = MXC4005_DRV_NAME;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &mxc4005_info;
+
+	ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev,
+					 iio_pollfunc_store_time,
+					 mxc4005_trigger_handler,
+					 NULL);
+	if (ret < 0) {
+		dev_err(&client->dev,
+			"failed to setup iio triggered buffer\n");
+		return ret;
+	}
+
+	if (client->irq > 0) {
+		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
+							   "%s-dev%d",
+							   indio_dev->name,
+							   indio_dev->id);
+		if (!data->dready_trig)
+			return -ENOMEM;
+
+		ret = devm_request_threaded_irq(&client->dev, client->irq,
+						iio_trigger_generic_data_rdy_poll,
+						NULL,
+						IRQF_TRIGGER_FALLING |
+						IRQF_ONESHOT,
+						MXC4005_IRQ_NAME,
+						data->dready_trig);
+		if (ret) {
+			dev_err(&client->dev,
+				"failed to init threaded irq\n");
+			return ret;
+		}
+
+		data->dready_trig->dev.parent = &client->dev;
+		data->dready_trig->ops = &mxc4005_trigger_ops;
+		iio_trigger_set_drvdata(data->dready_trig, indio_dev);
+		ret = devm_iio_trigger_register(&client->dev,
+						data->dready_trig);
+		if (ret) {
+			dev_err(&client->dev,
+				"failed to register trigger\n");
+			return ret;
+		}
+
+		indio_dev->trig = iio_trigger_get(data->dready_trig);
+	}
+
+	return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static const struct acpi_device_id mxc4005_acpi_match[] = {
+	{"MXC4005",	0},
+	{"MXC6655",	0},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, mxc4005_acpi_match);
+
+static const struct i2c_device_id mxc4005_id[] = {
+	{"mxc4005",	0},
+	{"mxc6655",	0},
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, mxc4005_id);
+
+static struct i2c_driver mxc4005_driver = {
+	.driver = {
+		.name = MXC4005_DRV_NAME,
+		.acpi_match_table = ACPI_PTR(mxc4005_acpi_match),
+	},
+	.probe		= mxc4005_probe,
+	.id_table	= mxc4005_id,
+};
+
+module_i2c_driver(mxc4005_driver);
+
+MODULE_AUTHOR("Teodora Baluta <teodora.baluta@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MXC4005 3-axis accelerometer driver");
diff --git a/drivers/iio/accel/mxc6255.c b/drivers/iio/accel/mxc6255.c
new file mode 100644
index 000000000..9aeeadc42
--- /dev/null
+++ b/drivers/iio/accel/mxc6255.c
@@ -0,0 +1,195 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * MXC6255 - MEMSIC orientation sensing accelerometer
+ *
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * IIO driver for MXC6255 (7-bit I2C slave address 0x15).
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/iio/iio.h>
+#include <linux/delay.h>
+#include <linux/acpi.h>
+#include <linux/regmap.h>
+#include <linux/iio/sysfs.h>
+
+#define MXC6255_DRV_NAME		"mxc6255"
+#define MXC6255_REGMAP_NAME		"mxc6255_regmap"
+
+#define MXC6255_REG_XOUT		0x00
+#define MXC6255_REG_YOUT		0x01
+#define MXC6255_REG_CHIP_ID		0x08
+
+#define MXC6255_CHIP_ID			0x05
+
+/*
+ * MXC6255 has only one measurement range: +/- 2G.
+ * The acceleration output is an 8-bit value.
+ *
+ * Scale is calculated as follows:
+ * (2 + 2) * 9.80665 / (2^8 - 1) = 0.153829
+ *
+ * Scale value for +/- 2G measurement range
+ */
+#define MXC6255_SCALE			153829
+
+enum mxc6255_axis {
+	AXIS_X,
+	AXIS_Y,
+};
+
+struct mxc6255_data {
+	struct i2c_client *client;
+	struct regmap *regmap;
+};
+
+static int mxc6255_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct mxc6255_data *data = iio_priv(indio_dev);
+	unsigned int reg;
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = regmap_read(data->regmap, chan->address, &reg);
+		if (ret < 0) {
+			dev_err(&data->client->dev,
+				"Error reading reg %lu\n", chan->address);
+			return ret;
+		}
+
+		*val = sign_extend32(reg, 7);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = MXC6255_SCALE;
+		return IIO_VAL_INT_PLUS_MICRO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info mxc6255_info = {
+	.read_raw	= mxc6255_read_raw,
+};
+
+#define MXC6255_CHANNEL(_axis, reg) {				\
+	.type = IIO_ACCEL,					\
+	.modified = 1,						\
+	.channel2 = IIO_MOD_##_axis,				\
+	.address = reg,						\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+}
+
+static const struct iio_chan_spec mxc6255_channels[] = {
+	MXC6255_CHANNEL(X, MXC6255_REG_XOUT),
+	MXC6255_CHANNEL(Y, MXC6255_REG_YOUT),
+};
+
+static bool mxc6255_is_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case MXC6255_REG_XOUT:
+	case MXC6255_REG_YOUT:
+	case MXC6255_REG_CHIP_ID:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config mxc6255_regmap_config = {
+	.name = MXC6255_REGMAP_NAME,
+
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.readable_reg = mxc6255_is_readable_reg,
+};
+
+static int mxc6255_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct mxc6255_data *data;
+	struct iio_dev *indio_dev;
+	struct regmap *regmap;
+	unsigned int chip_id;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	regmap = devm_regmap_init_i2c(client, &mxc6255_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(&client->dev, "Error initializing regmap\n");
+		return PTR_ERR(regmap);
+	}
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	data->client = client;
+	data->regmap = regmap;
+
+	indio_dev->name = MXC6255_DRV_NAME;
+	indio_dev->channels = mxc6255_channels;
+	indio_dev->num_channels = ARRAY_SIZE(mxc6255_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &mxc6255_info;
+
+	ret = regmap_read(data->regmap, MXC6255_REG_CHIP_ID, &chip_id);
+	if (ret < 0) {
+		dev_err(&client->dev, "Error reading chip id %d\n", ret);
+		return ret;
+	}
+
+	if ((chip_id & 0x1f) != MXC6255_CHIP_ID) {
+		dev_err(&client->dev, "Invalid chip id %x\n", chip_id);
+		return -ENODEV;
+	}
+
+	dev_dbg(&client->dev, "Chip id %x\n", chip_id);
+
+	ret = devm_iio_device_register(&client->dev, indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "Could not register IIO device\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct acpi_device_id mxc6255_acpi_match[] = {
+	{"MXC6225",	0},
+	{"MXC6255",	0},
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, mxc6255_acpi_match);
+
+static const struct i2c_device_id mxc6255_id[] = {
+	{"mxc6225",	0},
+	{"mxc6255",	0},
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, mxc6255_id);
+
+static struct i2c_driver mxc6255_driver = {
+	.driver = {
+		.name = MXC6255_DRV_NAME,
+		.acpi_match_table = ACPI_PTR(mxc6255_acpi_match),
+	},
+	.probe		= mxc6255_probe,
+	.id_table	= mxc6255_id,
+};
+
+module_i2c_driver(mxc6255_driver);
+
+MODULE_AUTHOR("Teodora Baluta <teodora.baluta@intel.com>");
+MODULE_DESCRIPTION("MEMSIC MXC6255 orientation sensing accelerometer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/sca3000.c b/drivers/iio/accel/sca3000.c
new file mode 100644
index 000000000..194738660
--- /dev/null
+++ b/drivers/iio/accel/sca3000.c
@@ -0,0 +1,1568 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * sca3000_core.c -- support VTI sca3000 series accelerometers via SPI
+ *
+ * Copyright (c) 2009 Jonathan Cameron <jic23@kernel.org>
+ *
+ * See industrialio/accels/sca3000.h for comments.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/sysfs.h>
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/kfifo_buf.h>
+
+#define SCA3000_WRITE_REG(a) (((a) << 2) | 0x02)
+#define SCA3000_READ_REG(a) ((a) << 2)
+
+#define SCA3000_REG_REVID_ADDR				0x00
+#define   SCA3000_REG_REVID_MAJOR_MASK			GENMASK(8, 4)
+#define   SCA3000_REG_REVID_MINOR_MASK			GENMASK(3, 0)
+
+#define SCA3000_REG_STATUS_ADDR				0x02
+#define   SCA3000_LOCKED				BIT(5)
+#define   SCA3000_EEPROM_CS_ERROR			BIT(1)
+#define   SCA3000_SPI_FRAME_ERROR			BIT(0)
+
+/* All reads done using register decrement so no need to directly access LSBs */
+#define SCA3000_REG_X_MSB_ADDR				0x05
+#define SCA3000_REG_Y_MSB_ADDR				0x07
+#define SCA3000_REG_Z_MSB_ADDR				0x09
+
+#define SCA3000_REG_RING_OUT_ADDR			0x0f
+
+/* Temp read untested - the e05 doesn't have the sensor */
+#define SCA3000_REG_TEMP_MSB_ADDR			0x13
+
+#define SCA3000_REG_MODE_ADDR				0x14
+#define SCA3000_MODE_PROT_MASK				0x28
+#define   SCA3000_REG_MODE_RING_BUF_ENABLE		BIT(7)
+#define   SCA3000_REG_MODE_RING_BUF_8BIT		BIT(6)
+
+/*
+ * Free fall detection triggers an interrupt if the acceleration
+ * is below a threshold for equivalent of 25cm drop
+ */
+#define   SCA3000_REG_MODE_FREE_FALL_DETECT		BIT(4)
+#define   SCA3000_REG_MODE_MEAS_MODE_NORMAL		0x00
+#define   SCA3000_REG_MODE_MEAS_MODE_OP_1		0x01
+#define   SCA3000_REG_MODE_MEAS_MODE_OP_2		0x02
+
+/*
+ * In motion detection mode the accelerations are band pass filtered
+ * (approx 1 - 25Hz) and then a programmable threshold used to trigger
+ * and interrupt.
+ */
+#define   SCA3000_REG_MODE_MEAS_MODE_MOT_DET		0x03
+#define   SCA3000_REG_MODE_MODE_MASK			0x03
+
+#define SCA3000_REG_BUF_COUNT_ADDR			0x15
+
+#define SCA3000_REG_INT_STATUS_ADDR			0x16
+#define   SCA3000_REG_INT_STATUS_THREE_QUARTERS		BIT(7)
+#define   SCA3000_REG_INT_STATUS_HALF			BIT(6)
+
+#define SCA3000_INT_STATUS_FREE_FALL			BIT(3)
+#define SCA3000_INT_STATUS_Y_TRIGGER			BIT(2)
+#define SCA3000_INT_STATUS_X_TRIGGER			BIT(1)
+#define SCA3000_INT_STATUS_Z_TRIGGER			BIT(0)
+
+/* Used to allow access to multiplexed registers */
+#define SCA3000_REG_CTRL_SEL_ADDR			0x18
+/* Only available for SCA3000-D03 and SCA3000-D01 */
+#define   SCA3000_REG_CTRL_SEL_I2C_DISABLE		0x01
+#define   SCA3000_REG_CTRL_SEL_MD_CTRL			0x02
+#define   SCA3000_REG_CTRL_SEL_MD_Y_TH			0x03
+#define   SCA3000_REG_CTRL_SEL_MD_X_TH			0x04
+#define   SCA3000_REG_CTRL_SEL_MD_Z_TH			0x05
+/*
+ * BE VERY CAREFUL WITH THIS, IF 3 BITS ARE NOT SET the device
+ * will not function
+ */
+#define   SCA3000_REG_CTRL_SEL_OUT_CTRL			0x0B
+
+#define     SCA3000_REG_OUT_CTRL_PROT_MASK		0xE0
+#define     SCA3000_REG_OUT_CTRL_BUF_X_EN		0x10
+#define     SCA3000_REG_OUT_CTRL_BUF_Y_EN		0x08
+#define     SCA3000_REG_OUT_CTRL_BUF_Z_EN		0x04
+#define     SCA3000_REG_OUT_CTRL_BUF_DIV_MASK		0x03
+#define     SCA3000_REG_OUT_CTRL_BUF_DIV_4		0x02
+#define     SCA3000_REG_OUT_CTRL_BUF_DIV_2		0x01
+
+
+/*
+ * Control which motion detector interrupts are on.
+ * For now only OR combinations are supported.
+ */
+#define SCA3000_MD_CTRL_PROT_MASK			0xC0
+#define SCA3000_MD_CTRL_OR_Y				BIT(0)
+#define SCA3000_MD_CTRL_OR_X				BIT(1)
+#define SCA3000_MD_CTRL_OR_Z				BIT(2)
+/* Currently unsupported */
+#define SCA3000_MD_CTRL_AND_Y				BIT(3)
+#define SCA3000_MD_CTRL_AND_X				BIT(4)
+#define SCA3000_MD_CTRL_AND_Z				BIT(5)
+
+/*
+ * Some control registers of complex access methods requiring this register to
+ * be used to remove a lock.
+ */
+#define SCA3000_REG_UNLOCK_ADDR				0x1e
+
+#define SCA3000_REG_INT_MASK_ADDR			0x21
+#define   SCA3000_REG_INT_MASK_PROT_MASK		0x1C
+
+#define   SCA3000_REG_INT_MASK_RING_THREE_QUARTER	BIT(7)
+#define   SCA3000_REG_INT_MASK_RING_HALF		BIT(6)
+
+#define SCA3000_REG_INT_MASK_ALL_INTS			0x02
+#define SCA3000_REG_INT_MASK_ACTIVE_HIGH		0x01
+#define SCA3000_REG_INT_MASK_ACTIVE_LOW			0x00
+/* Values of multiplexed registers (write to ctrl_data after select) */
+#define SCA3000_REG_CTRL_DATA_ADDR			0x22
+
+/*
+ * Measurement modes available on some sca3000 series chips. Code assumes others
+ * may become available in the future.
+ *
+ * Bypass - Bypass the low-pass filter in the signal channel so as to increase
+ *          signal bandwidth.
+ *
+ * Narrow - Narrow low-pass filtering of the signal channel and half output
+ *          data rate by decimation.
+ *
+ * Wide - Widen low-pass filtering of signal channel to increase bandwidth
+ */
+#define SCA3000_OP_MODE_BYPASS				0x01
+#define SCA3000_OP_MODE_NARROW				0x02
+#define SCA3000_OP_MODE_WIDE				0x04
+#define SCA3000_MAX_TX 6
+#define SCA3000_MAX_RX 2
+
+/**
+ * struct sca3000_state - device instance state information
+ * @us:			the associated spi device
+ * @info:			chip variant information
+ * @last_timestamp:		the timestamp of the last event
+ * @mo_det_use_count:		reference counter for the motion detection unit
+ * @lock:			lock used to protect elements of sca3000_state
+ *				and the underlying device state.
+ * @tx:			dma-able transmit buffer
+ * @rx:			dma-able receive buffer
+ **/
+struct sca3000_state {
+	struct spi_device		*us;
+	const struct sca3000_chip_info	*info;
+	s64				last_timestamp;
+	int				mo_det_use_count;
+	struct mutex			lock;
+	/* Can these share a cacheline ? */
+	u8				rx[384] ____cacheline_aligned;
+	u8				tx[6] ____cacheline_aligned;
+};
+
+/**
+ * struct sca3000_chip_info - model dependent parameters
+ * @scale:			scale * 10^-6
+ * @temp_output:		some devices have temperature sensors.
+ * @measurement_mode_freq:	normal mode sampling frequency
+ * @measurement_mode_3db_freq:	3db cutoff frequency of the low pass filter for
+ * the normal measurement mode.
+ * @option_mode_1:		first optional mode. Not all models have one
+ * @option_mode_1_freq:		option mode 1 sampling frequency
+ * @option_mode_1_3db_freq:	3db cutoff frequency of the low pass filter for
+ * the first option mode.
+ * @option_mode_2:		second optional mode. Not all chips have one
+ * @option_mode_2_freq:		option mode 2 sampling frequency
+ * @option_mode_2_3db_freq:	3db cutoff frequency of the low pass filter for
+ * the second option mode.
+ * @mot_det_mult_xz:		Bit wise multipliers to calculate the threshold
+ * for motion detection in the x and z axis.
+ * @mot_det_mult_y:		Bit wise multipliers to calculate the threshold
+ * for motion detection in the y axis.
+ *
+ * This structure is used to hold information about the functionality of a given
+ * sca3000 variant.
+ **/
+struct sca3000_chip_info {
+	unsigned int		scale;
+	bool			temp_output;
+	int			measurement_mode_freq;
+	int			measurement_mode_3db_freq;
+	int			option_mode_1;
+	int			option_mode_1_freq;
+	int			option_mode_1_3db_freq;
+	int			option_mode_2;
+	int			option_mode_2_freq;
+	int			option_mode_2_3db_freq;
+	int			mot_det_mult_xz[6];
+	int			mot_det_mult_y[7];
+};
+
+enum sca3000_variant {
+	d01,
+	e02,
+	e04,
+	e05,
+};
+
+/*
+ * Note where option modes are not defined, the chip simply does not
+ * support any.
+ * Other chips in the sca3000 series use i2c and are not included here.
+ *
+ * Some of these devices are only listed in the family data sheet and
+ * do not actually appear to be available.
+ */
+static const struct sca3000_chip_info sca3000_spi_chip_info_tbl[] = {
+	[d01] = {
+		.scale = 7357,
+		.temp_output = true,
+		.measurement_mode_freq = 250,
+		.measurement_mode_3db_freq = 45,
+		.option_mode_1 = SCA3000_OP_MODE_BYPASS,
+		.option_mode_1_freq = 250,
+		.option_mode_1_3db_freq = 70,
+		.mot_det_mult_xz = {50, 100, 200, 350, 650, 1300},
+		.mot_det_mult_y = {50, 100, 150, 250, 450, 850, 1750},
+	},
+	[e02] = {
+		.scale = 9810,
+		.measurement_mode_freq = 125,
+		.measurement_mode_3db_freq = 40,
+		.option_mode_1 = SCA3000_OP_MODE_NARROW,
+		.option_mode_1_freq = 63,
+		.option_mode_1_3db_freq = 11,
+		.mot_det_mult_xz = {100, 150, 300, 550, 1050, 2050},
+		.mot_det_mult_y = {50, 100, 200, 350, 700, 1350, 2700},
+	},
+	[e04] = {
+		.scale = 19620,
+		.measurement_mode_freq = 100,
+		.measurement_mode_3db_freq = 38,
+		.option_mode_1 = SCA3000_OP_MODE_NARROW,
+		.option_mode_1_freq = 50,
+		.option_mode_1_3db_freq = 9,
+		.option_mode_2 = SCA3000_OP_MODE_WIDE,
+		.option_mode_2_freq = 400,
+		.option_mode_2_3db_freq = 70,
+		.mot_det_mult_xz = {200, 300, 600, 1100, 2100, 4100},
+		.mot_det_mult_y = {100, 200, 400, 7000, 1400, 2700, 54000},
+	},
+	[e05] = {
+		.scale = 61313,
+		.measurement_mode_freq = 200,
+		.measurement_mode_3db_freq = 60,
+		.option_mode_1 = SCA3000_OP_MODE_NARROW,
+		.option_mode_1_freq = 50,
+		.option_mode_1_3db_freq = 9,
+		.option_mode_2 = SCA3000_OP_MODE_WIDE,
+		.option_mode_2_freq = 400,
+		.option_mode_2_3db_freq = 75,
+		.mot_det_mult_xz = {600, 900, 1700, 3200, 6100, 11900},
+		.mot_det_mult_y = {300, 600, 1200, 2000, 4100, 7800, 15600},
+	},
+};
+
+static int sca3000_write_reg(struct sca3000_state *st, u8 address, u8 val)
+{
+	st->tx[0] = SCA3000_WRITE_REG(address);
+	st->tx[1] = val;
+	return spi_write(st->us, st->tx, 2);
+}
+
+static int sca3000_read_data_short(struct sca3000_state *st,
+				   u8 reg_address_high,
+				   int len)
+{
+	struct spi_transfer xfer[2] = {
+		{
+			.len = 1,
+			.tx_buf = st->tx,
+		}, {
+			.len = len,
+			.rx_buf = st->rx,
+		}
+	};
+	st->tx[0] = SCA3000_READ_REG(reg_address_high);
+
+	return spi_sync_transfer(st->us, xfer, ARRAY_SIZE(xfer));
+}
+
+/**
+ * sca3000_reg_lock_on() - test if the ctrl register lock is on
+ * @st: Driver specific device instance data.
+ *
+ * Lock must be held.
+ **/
+static int sca3000_reg_lock_on(struct sca3000_state *st)
+{
+	int ret;
+
+	ret = sca3000_read_data_short(st, SCA3000_REG_STATUS_ADDR, 1);
+	if (ret < 0)
+		return ret;
+
+	return !(st->rx[0] & SCA3000_LOCKED);
+}
+
+/**
+ * __sca3000_unlock_reg_lock() - unlock the control registers
+ * @st: Driver specific device instance data.
+ *
+ * Note the device does not appear to support doing this in a single transfer.
+ * This should only ever be used as part of ctrl reg read.
+ * Lock must be held before calling this
+ */
+static int __sca3000_unlock_reg_lock(struct sca3000_state *st)
+{
+	struct spi_transfer xfer[3] = {
+		{
+			.len = 2,
+			.cs_change = 1,
+			.tx_buf = st->tx,
+		}, {
+			.len = 2,
+			.cs_change = 1,
+			.tx_buf = st->tx + 2,
+		}, {
+			.len = 2,
+			.tx_buf = st->tx + 4,
+		},
+	};
+	st->tx[0] = SCA3000_WRITE_REG(SCA3000_REG_UNLOCK_ADDR);
+	st->tx[1] = 0x00;
+	st->tx[2] = SCA3000_WRITE_REG(SCA3000_REG_UNLOCK_ADDR);
+	st->tx[3] = 0x50;
+	st->tx[4] = SCA3000_WRITE_REG(SCA3000_REG_UNLOCK_ADDR);
+	st->tx[5] = 0xA0;
+
+	return spi_sync_transfer(st->us, xfer, ARRAY_SIZE(xfer));
+}
+
+/**
+ * sca3000_write_ctrl_reg() write to a lock protect ctrl register
+ * @st: Driver specific device instance data.
+ * @sel: selects which registers we wish to write to
+ * @val: the value to be written
+ *
+ * Certain control registers are protected against overwriting by the lock
+ * register and use a shared write address. This function allows writing of
+ * these registers.
+ * Lock must be held.
+ */
+static int sca3000_write_ctrl_reg(struct sca3000_state *st,
+				  u8 sel,
+				  uint8_t val)
+{
+	int ret;
+
+	ret = sca3000_reg_lock_on(st);
+	if (ret < 0)
+		goto error_ret;
+	if (ret) {
+		ret = __sca3000_unlock_reg_lock(st);
+		if (ret)
+			goto error_ret;
+	}
+
+	/* Set the control select register */
+	ret = sca3000_write_reg(st, SCA3000_REG_CTRL_SEL_ADDR, sel);
+	if (ret)
+		goto error_ret;
+
+	/* Write the actual value into the register */
+	ret = sca3000_write_reg(st, SCA3000_REG_CTRL_DATA_ADDR, val);
+
+error_ret:
+	return ret;
+}
+
+/**
+ * sca3000_read_ctrl_reg() read from lock protected control register.
+ * @st: Driver specific device instance data.
+ * @ctrl_reg: Which ctrl register do we want to read.
+ *
+ * Lock must be held.
+ */
+static int sca3000_read_ctrl_reg(struct sca3000_state *st,
+				 u8 ctrl_reg)
+{
+	int ret;
+
+	ret = sca3000_reg_lock_on(st);
+	if (ret < 0)
+		goto error_ret;
+	if (ret) {
+		ret = __sca3000_unlock_reg_lock(st);
+		if (ret)
+			goto error_ret;
+	}
+	/* Set the control select register */
+	ret = sca3000_write_reg(st, SCA3000_REG_CTRL_SEL_ADDR, ctrl_reg);
+	if (ret)
+		goto error_ret;
+	ret = sca3000_read_data_short(st, SCA3000_REG_CTRL_DATA_ADDR, 1);
+	if (ret)
+		goto error_ret;
+	return st->rx[0];
+error_ret:
+	return ret;
+}
+
+/**
+ * sca3000_show_rev() - sysfs interface to read the chip revision number
+ * @indio_dev: Device instance specific generic IIO data.
+ * Driver specific device instance data can be obtained via
+ * via iio_priv(indio_dev)
+ */
+static int sca3000_print_rev(struct iio_dev *indio_dev)
+{
+	int ret;
+	struct sca3000_state *st = iio_priv(indio_dev);
+
+	mutex_lock(&st->lock);
+	ret = sca3000_read_data_short(st, SCA3000_REG_REVID_ADDR, 1);
+	if (ret < 0)
+		goto error_ret;
+	dev_info(&indio_dev->dev,
+		 "sca3000 revision major=%lu, minor=%lu\n",
+		 st->rx[0] & SCA3000_REG_REVID_MAJOR_MASK,
+		 st->rx[0] & SCA3000_REG_REVID_MINOR_MASK);
+error_ret:
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+static ssize_t
+sca3000_show_available_3db_freqs(struct device *dev,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int len;
+
+	len = sprintf(buf, "%d", st->info->measurement_mode_3db_freq);
+	if (st->info->option_mode_1)
+		len += sprintf(buf + len, " %d",
+			       st->info->option_mode_1_3db_freq);
+	if (st->info->option_mode_2)
+		len += sprintf(buf + len, " %d",
+			       st->info->option_mode_2_3db_freq);
+	len += sprintf(buf + len, "\n");
+
+	return len;
+}
+
+static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
+		       S_IRUGO, sca3000_show_available_3db_freqs,
+		       NULL, 0);
+
+static const struct iio_event_spec sca3000_event = {
+	.type = IIO_EV_TYPE_MAG,
+	.dir = IIO_EV_DIR_RISING,
+	.mask_separate = BIT(IIO_EV_INFO_VALUE) | BIT(IIO_EV_INFO_ENABLE),
+};
+
+/*
+ * Note the hack in the number of bits to pretend we have 2 more than
+ * we do in the fifo.
+ */
+#define SCA3000_CHAN(index, mod)				\
+	{							\
+		.type = IIO_ACCEL,				\
+		.modified = 1,					\
+		.channel2 = mod,				\
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |\
+			BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),\
+		.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),\
+		.address = index,				\
+		.scan_index = index,				\
+		.scan_type = {					\
+			.sign = 's',				\
+			.realbits = 13,				\
+			.storagebits = 16,			\
+			.shift = 3,				\
+			.endianness = IIO_BE,			\
+		},						\
+		.event_spec = &sca3000_event,			\
+		.num_event_specs = 1,				\
+	}
+
+static const struct iio_event_spec sca3000_freefall_event_spec = {
+	.type = IIO_EV_TYPE_MAG,
+	.dir = IIO_EV_DIR_FALLING,
+	.mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+		BIT(IIO_EV_INFO_PERIOD),
+};
+
+static const struct iio_chan_spec sca3000_channels[] = {
+	SCA3000_CHAN(0, IIO_MOD_X),
+	SCA3000_CHAN(1, IIO_MOD_Y),
+	SCA3000_CHAN(2, IIO_MOD_Z),
+	{
+		.type = IIO_ACCEL,
+		.modified = 1,
+		.channel2 = IIO_MOD_X_AND_Y_AND_Z,
+		.scan_index = -1, /* Fake channel */
+		.event_spec = &sca3000_freefall_event_spec,
+		.num_event_specs = 1,
+	},
+};
+
+static const struct iio_chan_spec sca3000_channels_with_temp[] = {
+	SCA3000_CHAN(0, IIO_MOD_X),
+	SCA3000_CHAN(1, IIO_MOD_Y),
+	SCA3000_CHAN(2, IIO_MOD_Z),
+	{
+		.type = IIO_TEMP,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
+			BIT(IIO_CHAN_INFO_OFFSET),
+		/* No buffer support */
+		.scan_index = -1,
+	},
+	{
+		.type = IIO_ACCEL,
+		.modified = 1,
+		.channel2 = IIO_MOD_X_AND_Y_AND_Z,
+		.scan_index = -1, /* Fake channel */
+		.event_spec = &sca3000_freefall_event_spec,
+		.num_event_specs = 1,
+	},
+};
+
+static u8 sca3000_addresses[3][3] = {
+	[0] = {SCA3000_REG_X_MSB_ADDR, SCA3000_REG_CTRL_SEL_MD_X_TH,
+	       SCA3000_MD_CTRL_OR_X},
+	[1] = {SCA3000_REG_Y_MSB_ADDR, SCA3000_REG_CTRL_SEL_MD_Y_TH,
+	       SCA3000_MD_CTRL_OR_Y},
+	[2] = {SCA3000_REG_Z_MSB_ADDR, SCA3000_REG_CTRL_SEL_MD_Z_TH,
+	       SCA3000_MD_CTRL_OR_Z},
+};
+
+/**
+ * __sca3000_get_base_freq() - obtain mode specific base frequency
+ * @st: Private driver specific device instance specific state.
+ * @info: chip type specific information.
+ * @base_freq: Base frequency for the current measurement mode.
+ *
+ * lock must be held
+ */
+static inline int __sca3000_get_base_freq(struct sca3000_state *st,
+					  const struct sca3000_chip_info *info,
+					  int *base_freq)
+{
+	int ret;
+
+	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);
+	if (ret)
+		goto error_ret;
+	switch (SCA3000_REG_MODE_MODE_MASK & st->rx[0]) {
+	case SCA3000_REG_MODE_MEAS_MODE_NORMAL:
+		*base_freq = info->measurement_mode_freq;
+		break;
+	case SCA3000_REG_MODE_MEAS_MODE_OP_1:
+		*base_freq = info->option_mode_1_freq;
+		break;
+	case SCA3000_REG_MODE_MEAS_MODE_OP_2:
+		*base_freq = info->option_mode_2_freq;
+		break;
+	default:
+		ret = -EINVAL;
+	}
+error_ret:
+	return ret;
+}
+
+/**
+ * sca3000_read_raw_samp_freq() - read_raw handler for IIO_CHAN_INFO_SAMP_FREQ
+ * @st: Private driver specific device instance specific state.
+ * @val: The frequency read back.
+ *
+ * lock must be held
+ **/
+static int sca3000_read_raw_samp_freq(struct sca3000_state *st, int *val)
+{
+	int ret;
+
+	ret = __sca3000_get_base_freq(st, st->info, val);
+	if (ret)
+		return ret;
+
+	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);
+	if (ret < 0)
+		return ret;
+
+	if (*val > 0) {
+		ret &= SCA3000_REG_OUT_CTRL_BUF_DIV_MASK;
+		switch (ret) {
+		case SCA3000_REG_OUT_CTRL_BUF_DIV_2:
+			*val /= 2;
+			break;
+		case SCA3000_REG_OUT_CTRL_BUF_DIV_4:
+			*val /= 4;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * sca3000_write_raw_samp_freq() - write_raw handler for IIO_CHAN_INFO_SAMP_FREQ
+ * @st: Private driver specific device instance specific state.
+ * @val: The frequency desired.
+ *
+ * lock must be held
+ */
+static int sca3000_write_raw_samp_freq(struct sca3000_state *st, int val)
+{
+	int ret, base_freq, ctrlval;
+
+	ret = __sca3000_get_base_freq(st, st->info, &base_freq);
+	if (ret)
+		return ret;
+
+	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);
+	if (ret < 0)
+		return ret;
+
+	ctrlval = ret & ~SCA3000_REG_OUT_CTRL_BUF_DIV_MASK;
+
+	if (val == base_freq / 2)
+		ctrlval |= SCA3000_REG_OUT_CTRL_BUF_DIV_2;
+	if (val == base_freq / 4)
+		ctrlval |= SCA3000_REG_OUT_CTRL_BUF_DIV_4;
+	else if (val != base_freq)
+		return -EINVAL;
+
+	return sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL,
+				     ctrlval);
+}
+
+static int sca3000_read_3db_freq(struct sca3000_state *st, int *val)
+{
+	int ret;
+
+	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);
+	if (ret)
+		return ret;
+
+	/* mask bottom 2 bits - only ones that are relevant */
+	st->rx[0] &= SCA3000_REG_MODE_MODE_MASK;
+	switch (st->rx[0]) {
+	case SCA3000_REG_MODE_MEAS_MODE_NORMAL:
+		*val = st->info->measurement_mode_3db_freq;
+		return IIO_VAL_INT;
+	case SCA3000_REG_MODE_MEAS_MODE_MOT_DET:
+		return -EBUSY;
+	case SCA3000_REG_MODE_MEAS_MODE_OP_1:
+		*val = st->info->option_mode_1_3db_freq;
+		return IIO_VAL_INT;
+	case SCA3000_REG_MODE_MEAS_MODE_OP_2:
+		*val = st->info->option_mode_2_3db_freq;
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int sca3000_write_3db_freq(struct sca3000_state *st, int val)
+{
+	int ret;
+	int mode;
+
+	if (val == st->info->measurement_mode_3db_freq)
+		mode = SCA3000_REG_MODE_MEAS_MODE_NORMAL;
+	else if (st->info->option_mode_1 &&
+		 (val == st->info->option_mode_1_3db_freq))
+		mode = SCA3000_REG_MODE_MEAS_MODE_OP_1;
+	else if (st->info->option_mode_2 &&
+		 (val == st->info->option_mode_2_3db_freq))
+		mode = SCA3000_REG_MODE_MEAS_MODE_OP_2;
+	else
+		return -EINVAL;
+	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);
+	if (ret)
+		return ret;
+
+	st->rx[0] &= ~SCA3000_REG_MODE_MODE_MASK;
+	st->rx[0] |= (mode & SCA3000_REG_MODE_MODE_MASK);
+
+	return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR, st->rx[0]);
+}
+
+static int sca3000_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val,
+			    int *val2,
+			    long mask)
+{
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int ret;
+	u8 address;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		mutex_lock(&st->lock);
+		if (chan->type == IIO_ACCEL) {
+			if (st->mo_det_use_count) {
+				mutex_unlock(&st->lock);
+				return -EBUSY;
+			}
+			address = sca3000_addresses[chan->address][0];
+			ret = sca3000_read_data_short(st, address, 2);
+			if (ret < 0) {
+				mutex_unlock(&st->lock);
+				return ret;
+			}
+			*val = (be16_to_cpup((__be16 *)st->rx) >> 3) & 0x1FFF;
+			*val = ((*val) << (sizeof(*val) * 8 - 13)) >>
+				(sizeof(*val) * 8 - 13);
+		} else {
+			/* get the temperature when available */
+			ret = sca3000_read_data_short(st,
+						      SCA3000_REG_TEMP_MSB_ADDR,
+						      2);
+			if (ret < 0) {
+				mutex_unlock(&st->lock);
+				return ret;
+			}
+			*val = ((st->rx[0] & 0x3F) << 3) |
+			       ((st->rx[1] & 0xE0) >> 5);
+		}
+		mutex_unlock(&st->lock);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		if (chan->type == IIO_ACCEL)
+			*val2 = st->info->scale;
+		else /* temperature */
+			*val2 = 555556;
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_OFFSET:
+		*val = -214;
+		*val2 = 600000;
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		mutex_lock(&st->lock);
+		ret = sca3000_read_raw_samp_freq(st, val);
+		mutex_unlock(&st->lock);
+		return ret ? ret : IIO_VAL_INT;
+	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+		mutex_lock(&st->lock);
+		ret = sca3000_read_3db_freq(st, val);
+		mutex_unlock(&st->lock);
+		return ret;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int sca3000_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		if (val2)
+			return -EINVAL;
+		mutex_lock(&st->lock);
+		ret = sca3000_write_raw_samp_freq(st, val);
+		mutex_unlock(&st->lock);
+		return ret;
+	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+		if (val2)
+			return -EINVAL;
+		mutex_lock(&st->lock);
+		ret = sca3000_write_3db_freq(st, val);
+		mutex_unlock(&st->lock);
+		return ret;
+	default:
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+/**
+ * sca3000_read_av_freq() - sysfs function to get available frequencies
+ * @dev: Device structure for this device.
+ * @attr: Description of the attribute.
+ * @buf: Incoming string
+ *
+ * The later modes are only relevant to the ring buffer - and depend on current
+ * mode. Note that data sheet gives rather wide tolerances for these so integer
+ * division will give good enough answer and not all chips have them specified
+ * at all.
+ **/
+static ssize_t sca3000_read_av_freq(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int len = 0, ret, val;
+
+	mutex_lock(&st->lock);
+	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);
+	val = st->rx[0];
+	mutex_unlock(&st->lock);
+	if (ret)
+		goto error_ret;
+
+	switch (val & SCA3000_REG_MODE_MODE_MASK) {
+	case SCA3000_REG_MODE_MEAS_MODE_NORMAL:
+		len += sprintf(buf + len, "%d %d %d\n",
+			       st->info->measurement_mode_freq,
+			       st->info->measurement_mode_freq / 2,
+			       st->info->measurement_mode_freq / 4);
+		break;
+	case SCA3000_REG_MODE_MEAS_MODE_OP_1:
+		len += sprintf(buf + len, "%d %d %d\n",
+			       st->info->option_mode_1_freq,
+			       st->info->option_mode_1_freq / 2,
+			       st->info->option_mode_1_freq / 4);
+		break;
+	case SCA3000_REG_MODE_MEAS_MODE_OP_2:
+		len += sprintf(buf + len, "%d %d %d\n",
+			       st->info->option_mode_2_freq,
+			       st->info->option_mode_2_freq / 2,
+			       st->info->option_mode_2_freq / 4);
+		break;
+	}
+	return len;
+error_ret:
+	return ret;
+}
+
+/*
+ * Should only really be registered if ring buffer support is compiled in.
+ * Does no harm however and doing it right would add a fair bit of complexity
+ */
+static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(sca3000_read_av_freq);
+
+/*
+ * sca3000_read_event_value() - query of a threshold or period
+ */
+static int sca3000_read_event_value(struct iio_dev *indio_dev,
+				    const struct iio_chan_spec *chan,
+				    enum iio_event_type type,
+				    enum iio_event_direction dir,
+				    enum iio_event_info info,
+				    int *val, int *val2)
+{
+	struct sca3000_state *st = iio_priv(indio_dev);
+	long ret;
+	int i;
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		mutex_lock(&st->lock);
+		ret = sca3000_read_ctrl_reg(st,
+					    sca3000_addresses[chan->address][1]);
+		mutex_unlock(&st->lock);
+		if (ret < 0)
+			return ret;
+		*val = 0;
+		if (chan->channel2 == IIO_MOD_Y)
+			for_each_set_bit(i, &ret,
+					 ARRAY_SIZE(st->info->mot_det_mult_y))
+				*val += st->info->mot_det_mult_y[i];
+		else
+			for_each_set_bit(i, &ret,
+					 ARRAY_SIZE(st->info->mot_det_mult_xz))
+				*val += st->info->mot_det_mult_xz[i];
+
+		return IIO_VAL_INT;
+	case IIO_EV_INFO_PERIOD:
+		*val = 0;
+		*val2 = 226000;
+		return IIO_VAL_INT_PLUS_MICRO;
+	default:
+		return -EINVAL;
+	}
+}
+
+/**
+ * sca3000_write_value() - control of threshold and period
+ * @indio_dev: Device instance specific IIO information.
+ * @chan: Description of the channel for which the event is being
+ * configured.
+ * @type: The type of event being configured, here magnitude rising
+ * as everything else is read only.
+ * @dir: Direction of the event (here rising)
+ * @info: What information about the event are we configuring.
+ * Here the threshold only.
+ * @val: Integer part of the value being written..
+ * @val2: Non integer part of the value being written. Here always 0.
+ */
+static int sca3000_write_event_value(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir,
+				     enum iio_event_info info,
+				     int val, int val2)
+{
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int ret;
+	int i;
+	u8 nonlinear = 0;
+
+	if (chan->channel2 == IIO_MOD_Y) {
+		i = ARRAY_SIZE(st->info->mot_det_mult_y);
+		while (i > 0)
+			if (val >= st->info->mot_det_mult_y[--i]) {
+				nonlinear |= (1 << i);
+				val -= st->info->mot_det_mult_y[i];
+			}
+	} else {
+		i = ARRAY_SIZE(st->info->mot_det_mult_xz);
+		while (i > 0)
+			if (val >= st->info->mot_det_mult_xz[--i]) {
+				nonlinear |= (1 << i);
+				val -= st->info->mot_det_mult_xz[i];
+			}
+	}
+
+	mutex_lock(&st->lock);
+	ret = sca3000_write_ctrl_reg(st,
+				     sca3000_addresses[chan->address][1],
+				     nonlinear);
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+static struct attribute *sca3000_attributes[] = {
+	&iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.dev_attr.attr,
+	&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group sca3000_attribute_group = {
+	.attrs = sca3000_attributes,
+};
+
+static int sca3000_read_data(struct sca3000_state *st,
+			     u8 reg_address_high,
+			     u8 *rx,
+			     int len)
+{
+	int ret;
+	struct spi_transfer xfer[2] = {
+		{
+			.len = 1,
+			.tx_buf = st->tx,
+		}, {
+			.len = len,
+			.rx_buf = rx,
+		}
+	};
+
+	st->tx[0] = SCA3000_READ_REG(reg_address_high);
+	ret = spi_sync_transfer(st->us, xfer, ARRAY_SIZE(xfer));
+	if (ret) {
+		dev_err(&st->us->dev, "problem reading register\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+/**
+ * sca3000_ring_int_process() - ring specific interrupt handling.
+ * @val: Value of the interrupt status register.
+ * @indio_dev: Device instance specific IIO device structure.
+ */
+static void sca3000_ring_int_process(u8 val, struct iio_dev *indio_dev)
+{
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int ret, i, num_available;
+
+	mutex_lock(&st->lock);
+
+	if (val & SCA3000_REG_INT_STATUS_HALF) {
+		ret = sca3000_read_data_short(st, SCA3000_REG_BUF_COUNT_ADDR,
+					      1);
+		if (ret)
+			goto error_ret;
+		num_available = st->rx[0];
+		/*
+		 * num_available is the total number of samples available
+		 * i.e. number of time points * number of channels.
+		 */
+		ret = sca3000_read_data(st, SCA3000_REG_RING_OUT_ADDR, st->rx,
+					num_available * 2);
+		if (ret)
+			goto error_ret;
+		for (i = 0; i < num_available / 3; i++) {
+			/*
+			 * Dirty hack to cover for 11 bit in fifo, 13 bit
+			 * direct reading.
+			 *
+			 * In theory the bottom two bits are undefined.
+			 * In reality they appear to always be 0.
+			 */
+			iio_push_to_buffers(indio_dev, st->rx + i * 3 * 2);
+		}
+	}
+error_ret:
+	mutex_unlock(&st->lock);
+}
+
+/**
+ * sca3000_event_handler() - handling ring and non ring events
+ * @irq: The irq being handled.
+ * @private: struct iio_device pointer for the device.
+ *
+ * Ring related interrupt handler. Depending on event, push to
+ * the ring buffer event chrdev or the event one.
+ *
+ * This function is complicated by the fact that the devices can signify ring
+ * and non ring events via the same interrupt line and they can only
+ * be distinguished via a read of the relevant status register.
+ */
+static irqreturn_t sca3000_event_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int ret, val;
+	s64 last_timestamp = iio_get_time_ns(indio_dev);
+
+	/*
+	 * Could lead if badly timed to an extra read of status reg,
+	 * but ensures no interrupt is missed.
+	 */
+	mutex_lock(&st->lock);
+	ret = sca3000_read_data_short(st, SCA3000_REG_INT_STATUS_ADDR, 1);
+	val = st->rx[0];
+	mutex_unlock(&st->lock);
+	if (ret)
+		goto done;
+
+	sca3000_ring_int_process(val, indio_dev);
+
+	if (val & SCA3000_INT_STATUS_FREE_FALL)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_X_AND_Y_AND_Z,
+						  IIO_EV_TYPE_MAG,
+						  IIO_EV_DIR_FALLING),
+			       last_timestamp);
+
+	if (val & SCA3000_INT_STATUS_Y_TRIGGER)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_Y,
+						  IIO_EV_TYPE_MAG,
+						  IIO_EV_DIR_RISING),
+			       last_timestamp);
+
+	if (val & SCA3000_INT_STATUS_X_TRIGGER)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_X,
+						  IIO_EV_TYPE_MAG,
+						  IIO_EV_DIR_RISING),
+			       last_timestamp);
+
+	if (val & SCA3000_INT_STATUS_Z_TRIGGER)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_Z,
+						  IIO_EV_TYPE_MAG,
+						  IIO_EV_DIR_RISING),
+			       last_timestamp);
+
+done:
+	return IRQ_HANDLED;
+}
+
+/*
+ * sca3000_read_event_config() what events are enabled
+ */
+static int sca3000_read_event_config(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir)
+{
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int ret;
+	/* read current value of mode register */
+	mutex_lock(&st->lock);
+
+	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);
+	if (ret)
+		goto error_ret;
+
+	switch (chan->channel2) {
+	case IIO_MOD_X_AND_Y_AND_Z:
+		ret = !!(st->rx[0] & SCA3000_REG_MODE_FREE_FALL_DETECT);
+		break;
+	case IIO_MOD_X:
+	case IIO_MOD_Y:
+	case IIO_MOD_Z:
+		/*
+		 * Motion detection mode cannot run at the same time as
+		 * acceleration data being read.
+		 */
+		if ((st->rx[0] & SCA3000_REG_MODE_MODE_MASK)
+		    != SCA3000_REG_MODE_MEAS_MODE_MOT_DET) {
+			ret = 0;
+		} else {
+			ret = sca3000_read_ctrl_reg(st,
+						SCA3000_REG_CTRL_SEL_MD_CTRL);
+			if (ret < 0)
+				goto error_ret;
+			/* only supporting logical or's for now */
+			ret = !!(ret & sca3000_addresses[chan->address][2]);
+		}
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+error_ret:
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+static int sca3000_freefall_set_state(struct iio_dev *indio_dev, int state)
+{
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int ret;
+
+	/* read current value of mode register */
+	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);
+	if (ret)
+		return ret;
+
+	/* if off and should be on */
+	if (state && !(st->rx[0] & SCA3000_REG_MODE_FREE_FALL_DETECT))
+		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,
+					 st->rx[0] | SCA3000_REG_MODE_FREE_FALL_DETECT);
+	/* if on and should be off */
+	else if (!state && (st->rx[0] & SCA3000_REG_MODE_FREE_FALL_DETECT))
+		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,
+					 st->rx[0] & ~SCA3000_REG_MODE_FREE_FALL_DETECT);
+	else
+		return 0;
+}
+
+static int sca3000_motion_detect_set_state(struct iio_dev *indio_dev, int axis,
+					   int state)
+{
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int ret, ctrlval;
+
+	/*
+	 * First read the motion detector config to find out if
+	 * this axis is on
+	 */
+	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);
+	if (ret < 0)
+		return ret;
+	ctrlval = ret;
+	/* if off and should be on */
+	if (state && !(ctrlval & sca3000_addresses[axis][2])) {
+		ret = sca3000_write_ctrl_reg(st,
+					     SCA3000_REG_CTRL_SEL_MD_CTRL,
+					     ctrlval |
+					     sca3000_addresses[axis][2]);
+		if (ret)
+			return ret;
+		st->mo_det_use_count++;
+	} else if (!state && (ctrlval & sca3000_addresses[axis][2])) {
+		ret = sca3000_write_ctrl_reg(st,
+					     SCA3000_REG_CTRL_SEL_MD_CTRL,
+					     ctrlval &
+					     ~(sca3000_addresses[axis][2]));
+		if (ret)
+			return ret;
+		st->mo_det_use_count--;
+	}
+
+	/* read current value of mode register */
+	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);
+	if (ret)
+		return ret;
+	/* if off and should be on */
+	if ((st->mo_det_use_count) &&
+	    ((st->rx[0] & SCA3000_REG_MODE_MODE_MASK)
+	     != SCA3000_REG_MODE_MEAS_MODE_MOT_DET))
+		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,
+			(st->rx[0] & ~SCA3000_REG_MODE_MODE_MASK)
+			| SCA3000_REG_MODE_MEAS_MODE_MOT_DET);
+	/* if on and should be off */
+	else if (!(st->mo_det_use_count) &&
+		 ((st->rx[0] & SCA3000_REG_MODE_MODE_MASK)
+		  == SCA3000_REG_MODE_MEAS_MODE_MOT_DET))
+		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,
+			st->rx[0] & SCA3000_REG_MODE_MODE_MASK);
+	else
+		return 0;
+}
+
+/**
+ * sca3000_write_event_config() - simple on off control for motion detector
+ * @indio_dev: IIO device instance specific structure. Data specific to this
+ * particular driver may be accessed via iio_priv(indio_dev).
+ * @chan: Description of the channel whose event we are configuring.
+ * @type: The type of event.
+ * @dir: The direction of the event.
+ * @state: Desired state of event being configured.
+ *
+ * This is a per axis control, but enabling any will result in the
+ * motion detector unit being enabled.
+ * N.B. enabling motion detector stops normal data acquisition.
+ * There is a complexity in knowing which mode to return to when
+ * this mode is disabled.  Currently normal mode is assumed.
+ **/
+static int sca3000_write_event_config(struct iio_dev *indio_dev,
+				      const struct iio_chan_spec *chan,
+				      enum iio_event_type type,
+				      enum iio_event_direction dir,
+				      int state)
+{
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&st->lock);
+	switch (chan->channel2) {
+	case IIO_MOD_X_AND_Y_AND_Z:
+		ret = sca3000_freefall_set_state(indio_dev, state);
+		break;
+
+	case IIO_MOD_X:
+	case IIO_MOD_Y:
+	case IIO_MOD_Z:
+		ret = sca3000_motion_detect_set_state(indio_dev,
+						      chan->address,
+						      state);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+static int sca3000_configure_ring(struct iio_dev *indio_dev)
+{
+	struct iio_buffer *buffer;
+
+	buffer = devm_iio_kfifo_allocate(&indio_dev->dev);
+	if (!buffer)
+		return -ENOMEM;
+
+	iio_device_attach_buffer(indio_dev, buffer);
+	indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
+
+	return 0;
+}
+
+static inline
+int __sca3000_hw_ring_state_set(struct iio_dev *indio_dev, bool state)
+{
+	struct sca3000_state *st = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&st->lock);
+	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);
+	if (ret)
+		goto error_ret;
+	if (state) {
+		dev_info(&indio_dev->dev, "supposedly enabling ring buffer\n");
+		ret = sca3000_write_reg(st,
+			SCA3000_REG_MODE_ADDR,
+			(st->rx[0] | SCA3000_REG_MODE_RING_BUF_ENABLE));
+	} else
+		ret = sca3000_write_reg(st,
+			SCA3000_REG_MODE_ADDR,
+			(st->rx[0] & ~SCA3000_REG_MODE_RING_BUF_ENABLE));
+error_ret:
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+/**
+ * sca3000_hw_ring_preenable() - hw ring buffer preenable function
+ * @indio_dev: structure representing the IIO device. Device instance
+ * specific state can be accessed via iio_priv(indio_dev).
+ *
+ * Very simple enable function as the chip will allows normal reads
+ * during ring buffer operation so as long as it is indeed running
+ * before we notify the core, the precise ordering does not matter.
+ */
+static int sca3000_hw_ring_preenable(struct iio_dev *indio_dev)
+{
+	int ret;
+	struct sca3000_state *st = iio_priv(indio_dev);
+
+	mutex_lock(&st->lock);
+
+	/* Enable the 50% full interrupt */
+	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);
+	if (ret)
+		goto error_unlock;
+	ret = sca3000_write_reg(st,
+				SCA3000_REG_INT_MASK_ADDR,
+				st->rx[0] | SCA3000_REG_INT_MASK_RING_HALF);
+	if (ret)
+		goto error_unlock;
+
+	mutex_unlock(&st->lock);
+
+	return __sca3000_hw_ring_state_set(indio_dev, 1);
+
+error_unlock:
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+static int sca3000_hw_ring_postdisable(struct iio_dev *indio_dev)
+{
+	int ret;
+	struct sca3000_state *st = iio_priv(indio_dev);
+
+	ret = __sca3000_hw_ring_state_set(indio_dev, 0);
+	if (ret)
+		return ret;
+
+	/* Disable the 50% full interrupt */
+	mutex_lock(&st->lock);
+
+	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);
+	if (ret)
+		goto unlock;
+	ret = sca3000_write_reg(st,
+				SCA3000_REG_INT_MASK_ADDR,
+				st->rx[0] & ~SCA3000_REG_INT_MASK_RING_HALF);
+unlock:
+	mutex_unlock(&st->lock);
+	return ret;
+}
+
+static const struct iio_buffer_setup_ops sca3000_ring_setup_ops = {
+	.preenable = &sca3000_hw_ring_preenable,
+	.postdisable = &sca3000_hw_ring_postdisable,
+};
+
+/**
+ * sca3000_clean_setup() - get the device into a predictable state
+ * @st: Device instance specific private data structure
+ *
+ * Devices use flash memory to store many of the register values
+ * and hence can come up in somewhat unpredictable states.
+ * Hence reset everything on driver load.
+ */
+static int sca3000_clean_setup(struct sca3000_state *st)
+{
+	int ret;
+
+	mutex_lock(&st->lock);
+	/* Ensure all interrupts have been acknowledged */
+	ret = sca3000_read_data_short(st, SCA3000_REG_INT_STATUS_ADDR, 1);
+	if (ret)
+		goto error_ret;
+
+	/* Turn off all motion detection channels */
+	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);
+	if (ret < 0)
+		goto error_ret;
+	ret = sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL,
+				     ret & SCA3000_MD_CTRL_PROT_MASK);
+	if (ret)
+		goto error_ret;
+
+	/* Disable ring buffer */
+	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);
+	if (ret < 0)
+		goto error_ret;
+	ret = sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL,
+				     (ret & SCA3000_REG_OUT_CTRL_PROT_MASK)
+				     | SCA3000_REG_OUT_CTRL_BUF_X_EN
+				     | SCA3000_REG_OUT_CTRL_BUF_Y_EN
+				     | SCA3000_REG_OUT_CTRL_BUF_Z_EN
+				     | SCA3000_REG_OUT_CTRL_BUF_DIV_4);
+	if (ret)
+		goto error_ret;
+	/* Enable interrupts, relevant to mode and set up as active low */
+	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);
+	if (ret)
+		goto error_ret;
+	ret = sca3000_write_reg(st,
+				SCA3000_REG_INT_MASK_ADDR,
+				(ret & SCA3000_REG_INT_MASK_PROT_MASK)
+				| SCA3000_REG_INT_MASK_ACTIVE_LOW);
+	if (ret)
+		goto error_ret;
+	/*
+	 * Select normal measurement mode, free fall off, ring off
+	 * Ring in 12 bit mode - it is fine to overwrite reserved bits 3,5
+	 * as that occurs in one of the example on the datasheet
+	 */
+	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);
+	if (ret)
+		goto error_ret;
+	ret = sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,
+				(st->rx[0] & SCA3000_MODE_PROT_MASK));
+
+error_ret:
+	mutex_unlock(&st->lock);
+	return ret;
+}
+
+static const struct iio_info sca3000_info = {
+	.attrs = &sca3000_attribute_group,
+	.read_raw = &sca3000_read_raw,
+	.write_raw = &sca3000_write_raw,
+	.read_event_value = &sca3000_read_event_value,
+	.write_event_value = &sca3000_write_event_value,
+	.read_event_config = &sca3000_read_event_config,
+	.write_event_config = &sca3000_write_event_config,
+};
+
+static int sca3000_probe(struct spi_device *spi)
+{
+	int ret;
+	struct sca3000_state *st;
+	struct iio_dev *indio_dev;
+
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
+	st->us = spi;
+	mutex_init(&st->lock);
+	st->info = &sca3000_spi_chip_info_tbl[spi_get_device_id(spi)
+					      ->driver_data];
+
+	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->info = &sca3000_info;
+	if (st->info->temp_output) {
+		indio_dev->channels = sca3000_channels_with_temp;
+		indio_dev->num_channels =
+			ARRAY_SIZE(sca3000_channels_with_temp);
+	} else {
+		indio_dev->channels = sca3000_channels;
+		indio_dev->num_channels = ARRAY_SIZE(sca3000_channels);
+	}
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	ret = sca3000_configure_ring(indio_dev);
+	if (ret)
+		return ret;
+
+	if (spi->irq) {
+		ret = request_threaded_irq(spi->irq,
+					   NULL,
+					   &sca3000_event_handler,
+					   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+					   "sca3000",
+					   indio_dev);
+		if (ret)
+			return ret;
+	}
+	indio_dev->setup_ops = &sca3000_ring_setup_ops;
+	ret = sca3000_clean_setup(st);
+	if (ret)
+		goto error_free_irq;
+
+	ret = sca3000_print_rev(indio_dev);
+	if (ret)
+		goto error_free_irq;
+
+	return iio_device_register(indio_dev);
+
+error_free_irq:
+	if (spi->irq)
+		free_irq(spi->irq, indio_dev);
+
+	return ret;
+}
+
+static int sca3000_stop_all_interrupts(struct sca3000_state *st)
+{
+	int ret;
+
+	mutex_lock(&st->lock);
+	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);
+	if (ret)
+		goto error_ret;
+	ret = sca3000_write_reg(st, SCA3000_REG_INT_MASK_ADDR,
+				(st->rx[0] &
+				 ~(SCA3000_REG_INT_MASK_RING_THREE_QUARTER |
+				   SCA3000_REG_INT_MASK_RING_HALF |
+				   SCA3000_REG_INT_MASK_ALL_INTS)));
+error_ret:
+	mutex_unlock(&st->lock);
+	return ret;
+}
+
+static int sca3000_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct sca3000_state *st = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	/* Must ensure no interrupts can be generated after this! */
+	sca3000_stop_all_interrupts(st);
+	if (spi->irq)
+		free_irq(spi->irq, indio_dev);
+
+	return 0;
+}
+
+static const struct spi_device_id sca3000_id[] = {
+	{"sca3000_d01", d01},
+	{"sca3000_e02", e02},
+	{"sca3000_e04", e04},
+	{"sca3000_e05", e05},
+	{}
+};
+MODULE_DEVICE_TABLE(spi, sca3000_id);
+
+static struct spi_driver sca3000_driver = {
+	.driver = {
+		.name = "sca3000",
+	},
+	.probe = sca3000_probe,
+	.remove = sca3000_remove,
+	.id_table = sca3000_id,
+};
+module_spi_driver(sca3000_driver);
+
+MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
+MODULE_DESCRIPTION("VTI SCA3000 Series Accelerometers SPI driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/ssp_accel_sensor.c b/drivers/iio/accel/ssp_accel_sensor.c
new file mode 100644
index 000000000..474477e91
--- /dev/null
+++ b/drivers/iio/accel/ssp_accel_sensor.c
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved.
+ */
+
+#include <linux/iio/common/ssp_sensors.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include "../common/ssp_sensors/ssp_iio_sensor.h"
+
+#define SSP_CHANNEL_COUNT 3
+
+#define SSP_ACCEL_NAME "ssp-accelerometer"
+static const char ssp_accel_device_name[] = SSP_ACCEL_NAME;
+
+enum ssp_accel_3d_channel {
+	SSP_CHANNEL_SCAN_INDEX_X,
+	SSP_CHANNEL_SCAN_INDEX_Y,
+	SSP_CHANNEL_SCAN_INDEX_Z,
+	SSP_CHANNEL_SCAN_INDEX_TIME,
+};
+
+static int ssp_accel_read_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,  int *val,
+			      int *val2, long mask)
+{
+	u32 t;
+	struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		t = ssp_get_sensor_delay(data, SSP_ACCELEROMETER_SENSOR);
+		ssp_convert_to_freq(t, val, val2);
+		return IIO_VAL_INT_PLUS_MICRO;
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static int ssp_accel_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan, int val,
+			       int val2, long mask)
+{
+	int ret;
+	struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		ret = ssp_convert_to_time(val, val2);
+		ret = ssp_change_delay(data, SSP_ACCELEROMETER_SENSOR, ret);
+		if (ret < 0)
+			dev_err(&indio_dev->dev, "accel sensor enable fail\n");
+
+		return ret;
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info ssp_accel_iio_info = {
+	.read_raw = &ssp_accel_read_raw,
+	.write_raw = &ssp_accel_write_raw,
+};
+
+static const unsigned long ssp_accel_scan_mask[] = { 0x7, 0, };
+
+static const struct iio_chan_spec ssp_acc_channels[] = {
+	SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X),
+	SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y),
+	SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z),
+	SSP_CHAN_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME),
+};
+
+static int ssp_process_accel_data(struct iio_dev *indio_dev, void *buf,
+				  int64_t timestamp)
+{
+	return ssp_common_process_data(indio_dev, buf, SSP_ACCELEROMETER_SIZE,
+				       timestamp);
+}
+
+static const struct iio_buffer_setup_ops ssp_accel_buffer_ops = {
+	.postenable = &ssp_common_buffer_postenable,
+	.postdisable = &ssp_common_buffer_postdisable,
+};
+
+static int ssp_accel_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct ssp_sensor_data *spd;
+	struct iio_buffer *buffer;
+
+	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	spd = iio_priv(indio_dev);
+
+	spd->process_data = ssp_process_accel_data;
+	spd->type = SSP_ACCELEROMETER_SENSOR;
+
+	indio_dev->name = ssp_accel_device_name;
+	indio_dev->info = &ssp_accel_iio_info;
+	indio_dev->modes = INDIO_BUFFER_SOFTWARE;
+	indio_dev->channels = ssp_acc_channels;
+	indio_dev->num_channels = ARRAY_SIZE(ssp_acc_channels);
+	indio_dev->available_scan_masks = ssp_accel_scan_mask;
+
+	buffer = devm_iio_kfifo_allocate(&pdev->dev);
+	if (!buffer)
+		return -ENOMEM;
+
+	iio_device_attach_buffer(indio_dev, buffer);
+
+	indio_dev->setup_ops = &ssp_accel_buffer_ops;
+
+	platform_set_drvdata(pdev, indio_dev);
+
+	ret = devm_iio_device_register(&pdev->dev, indio_dev);
+	if (ret < 0)
+		return ret;
+
+	/* ssp registering should be done after all iio setup */
+	ssp_register_consumer(indio_dev, SSP_ACCELEROMETER_SENSOR);
+
+	return 0;
+}
+
+static struct platform_driver ssp_accel_driver = {
+	.driver = {
+		.name = SSP_ACCEL_NAME,
+	},
+	.probe = ssp_accel_probe,
+};
+
+module_platform_driver(ssp_accel_driver);
+
+MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>");
+MODULE_DESCRIPTION("Samsung sensorhub accelerometers driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/st_accel.h b/drivers/iio/accel/st_accel.h
new file mode 100644
index 000000000..5d356288e
--- /dev/null
+++ b/drivers/iio/accel/st_accel.h
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * STMicroelectronics accelerometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ * v. 1.0.0
+ */
+
+#ifndef ST_ACCEL_H
+#define ST_ACCEL_H
+
+#include <linux/types.h>
+#include <linux/iio/common/st_sensors.h>
+
+enum st_accel_type {
+	LSM303DLH,
+	LSM303DLHC,
+	LIS3DH,
+	LSM330D,
+	LSM330DL,
+	LSM330DLC,
+	LIS331DLH,
+	LSM303DL,
+	LSM303DLM,
+	LSM330,
+	LSM303AGR,
+	LIS2DH12,
+	LIS3L02DQ,
+	LNG2DM,
+	H3LIS331DL,
+	LIS331DL,
+	LIS3LV02DL,
+	LIS2DW12,
+	LIS3DHH,
+	LIS2DE12,
+	LIS2HH12,
+	ST_ACCEL_MAX,
+};
+
+#define H3LIS331DL_ACCEL_DEV_NAME	"h3lis331dl_accel"
+#define LIS3LV02DL_ACCEL_DEV_NAME	"lis3lv02dl_accel"
+#define LSM303DLHC_ACCEL_DEV_NAME	"lsm303dlhc_accel"
+#define LIS3DH_ACCEL_DEV_NAME		"lis3dh"
+#define LSM330D_ACCEL_DEV_NAME		"lsm330d_accel"
+#define LSM330DL_ACCEL_DEV_NAME		"lsm330dl_accel"
+#define LSM330DLC_ACCEL_DEV_NAME	"lsm330dlc_accel"
+#define LIS331DL_ACCEL_DEV_NAME		"lis331dl_accel"
+#define LIS331DLH_ACCEL_DEV_NAME	"lis331dlh"
+#define LSM303DL_ACCEL_DEV_NAME		"lsm303dl_accel"
+#define LSM303DLH_ACCEL_DEV_NAME	"lsm303dlh_accel"
+#define LSM303DLM_ACCEL_DEV_NAME	"lsm303dlm_accel"
+#define LSM330_ACCEL_DEV_NAME		"lsm330_accel"
+#define LSM303AGR_ACCEL_DEV_NAME	"lsm303agr_accel"
+#define LIS2DH12_ACCEL_DEV_NAME		"lis2dh12_accel"
+#define LIS3L02DQ_ACCEL_DEV_NAME	"lis3l02dq"
+#define LNG2DM_ACCEL_DEV_NAME		"lng2dm"
+#define LIS2DW12_ACCEL_DEV_NAME		"lis2dw12"
+#define LIS3DHH_ACCEL_DEV_NAME		"lis3dhh"
+#define LIS3DE_ACCEL_DEV_NAME		"lis3de"
+#define LIS2DE12_ACCEL_DEV_NAME		"lis2de12"
+#define LIS2HH12_ACCEL_DEV_NAME		"lis2hh12"
+
+/**
+* struct st_sensors_platform_data - default accel platform data
+* @drdy_int_pin: default accel DRDY is available on INT1 pin.
+*/
+static __maybe_unused const struct st_sensors_platform_data default_accel_pdata = {
+	.drdy_int_pin = 1,
+};
+
+const struct st_sensor_settings *st_accel_get_settings(const char *name);
+int st_accel_common_probe(struct iio_dev *indio_dev);
+void st_accel_common_remove(struct iio_dev *indio_dev);
+
+#ifdef CONFIG_IIO_BUFFER
+int st_accel_allocate_ring(struct iio_dev *indio_dev);
+void st_accel_deallocate_ring(struct iio_dev *indio_dev);
+int st_accel_trig_set_state(struct iio_trigger *trig, bool state);
+#define ST_ACCEL_TRIGGER_SET_STATE (&st_accel_trig_set_state)
+#else /* CONFIG_IIO_BUFFER */
+static inline int st_accel_allocate_ring(struct iio_dev *indio_dev)
+{
+	return 0;
+}
+static inline void st_accel_deallocate_ring(struct iio_dev *indio_dev)
+{
+}
+#define ST_ACCEL_TRIGGER_SET_STATE NULL
+#endif /* CONFIG_IIO_BUFFER */
+
+#endif /* ST_ACCEL_H */
diff --git a/drivers/iio/accel/st_accel_buffer.c b/drivers/iio/accel/st_accel_buffer.c
new file mode 100644
index 000000000..492263589
--- /dev/null
+++ b/drivers/iio/accel/st_accel_buffer.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * STMicroelectronics accelerometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include "st_accel.h"
+
+int st_accel_trig_set_state(struct iio_trigger *trig, bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+
+	return st_sensors_set_dataready_irq(indio_dev, state);
+}
+
+static int st_accel_buffer_postenable(struct iio_dev *indio_dev)
+{
+	int err;
+
+	err = st_sensors_set_axis_enable(indio_dev, indio_dev->active_scan_mask[0]);
+	if (err < 0)
+		return err;
+
+	err = st_sensors_set_enable(indio_dev, true);
+	if (err < 0)
+		goto st_accel_buffer_enable_all_axis;
+
+	return 0;
+
+st_accel_buffer_enable_all_axis:
+	st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
+	return err;
+}
+
+static int st_accel_buffer_predisable(struct iio_dev *indio_dev)
+{
+	int err;
+
+	err = st_sensors_set_enable(indio_dev, false);
+	if (err < 0)
+		return err;
+
+	return st_sensors_set_axis_enable(indio_dev,
+					  ST_SENSORS_ENABLE_ALL_AXIS);
+}
+
+static const struct iio_buffer_setup_ops st_accel_buffer_setup_ops = {
+	.postenable = &st_accel_buffer_postenable,
+	.predisable = &st_accel_buffer_predisable,
+};
+
+int st_accel_allocate_ring(struct iio_dev *indio_dev)
+{
+	return iio_triggered_buffer_setup(indio_dev, NULL,
+		&st_sensors_trigger_handler, &st_accel_buffer_setup_ops);
+}
+
+void st_accel_deallocate_ring(struct iio_dev *indio_dev)
+{
+	iio_triggered_buffer_cleanup(indio_dev);
+}
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics accelerometers buffer");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c
new file mode 100644
index 000000000..bde0ca3ef
--- /dev/null
+++ b/drivers/iio/accel/st_accel_core.c
@@ -0,0 +1,1330 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * STMicroelectronics accelerometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/buffer.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include "st_accel.h"
+
+#define ST_ACCEL_NUMBER_DATA_CHANNELS		3
+
+/* DEFAULT VALUE FOR SENSORS */
+#define ST_ACCEL_DEFAULT_OUT_X_L_ADDR		0x28
+#define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR		0x2a
+#define ST_ACCEL_DEFAULT_OUT_Z_L_ADDR		0x2c
+
+/* FULLSCALE */
+#define ST_ACCEL_FS_AVL_2G			2
+#define ST_ACCEL_FS_AVL_4G			4
+#define ST_ACCEL_FS_AVL_6G			6
+#define ST_ACCEL_FS_AVL_8G			8
+#define ST_ACCEL_FS_AVL_16G			16
+#define ST_ACCEL_FS_AVL_100G			100
+#define ST_ACCEL_FS_AVL_200G			200
+#define ST_ACCEL_FS_AVL_400G			400
+
+static const struct iio_chan_spec st_accel_8bit_channels[] = {
+	ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 8, 8,
+			ST_ACCEL_DEFAULT_OUT_X_L_ADDR+1),
+	ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 8, 8,
+			ST_ACCEL_DEFAULT_OUT_Y_L_ADDR+1),
+	ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 8, 8,
+			ST_ACCEL_DEFAULT_OUT_Z_L_ADDR+1),
+	IIO_CHAN_SOFT_TIMESTAMP(3)
+};
+
+static const struct iio_chan_spec st_accel_12bit_channels[] = {
+	ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16,
+			ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
+	ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16,
+			ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
+	ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16,
+			ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
+	IIO_CHAN_SOFT_TIMESTAMP(3)
+};
+
+static const struct iio_chan_spec st_accel_16bit_channels[] = {
+	ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
+			ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
+	ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
+			ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
+	ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+			ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
+			ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
+	IIO_CHAN_SOFT_TIMESTAMP(3)
+};
+
+static const struct st_sensor_settings st_accel_sensors_settings[] = {
+	{
+		.wai = 0x33,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+		.sensors_supported = {
+			[0] = LIS3DH_ACCEL_DEV_NAME,
+			[1] = LSM303DLHC_ACCEL_DEV_NAME,
+			[2] = LSM330D_ACCEL_DEV_NAME,
+			[3] = LSM330DL_ACCEL_DEV_NAME,
+			[4] = LSM330DLC_ACCEL_DEV_NAME,
+			[5] = LSM303AGR_ACCEL_DEV_NAME,
+			[6] = LIS2DH12_ACCEL_DEV_NAME,
+			[7] = LIS3DE_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
+		.odr = {
+			.addr = 0x20,
+			.mask = 0xf0,
+			.odr_avl = {
+				{ .hz = 1, .value = 0x01, },
+				{ .hz = 10, .value = 0x02, },
+				{ .hz = 25, .value = 0x03, },
+				{ .hz = 50, .value = 0x04, },
+				{ .hz = 100, .value = 0x05, },
+				{ .hz = 200, .value = 0x06, },
+				{ .hz = 400, .value = 0x07, },
+				{ .hz = 1600, .value = 0x08, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0xf0,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.addr = 0x23,
+			.mask = 0x30,
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.value = 0x00,
+					.gain = IIO_G_TO_M_S_2(1000),
+				},
+				[1] = {
+					.num = ST_ACCEL_FS_AVL_4G,
+					.value = 0x01,
+					.gain = IIO_G_TO_M_S_2(2000),
+				},
+				[2] = {
+					.num = ST_ACCEL_FS_AVL_8G,
+					.value = 0x02,
+					.gain = IIO_G_TO_M_S_2(4000),
+				},
+				[3] = {
+					.num = ST_ACCEL_FS_AVL_16G,
+					.value = 0x03,
+					.gain = IIO_G_TO_M_S_2(12000),
+				},
+			},
+		},
+		.bdu = {
+			.addr = 0x23,
+			.mask = 0x80,
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x22,
+				.mask = 0x10,
+			},
+			.addr_ihl = 0x25,
+			.mask_ihl = 0x02,
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x07,
+			},
+		},
+		.sim = {
+			.addr = 0x23,
+			.value = BIT(0),
+		},
+		.multi_read_bit = true,
+		.bootime = 2,
+	},
+	{
+		.wai = 0x32,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+		.sensors_supported = {
+			[0] = LIS331DLH_ACCEL_DEV_NAME,
+			[1] = LSM303DL_ACCEL_DEV_NAME,
+			[2] = LSM303DLH_ACCEL_DEV_NAME,
+			[3] = LSM303DLM_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
+		.odr = {
+			.addr = 0x20,
+			.mask = 0x18,
+			.odr_avl = {
+				{ .hz = 50, .value = 0x00, },
+				{ .hz = 100, .value = 0x01, },
+				{ .hz = 400, .value = 0x02, },
+				{ .hz = 1000, .value = 0x03, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0xe0,
+			.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.addr = 0x23,
+			.mask = 0x30,
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.value = 0x00,
+					.gain = IIO_G_TO_M_S_2(1000),
+				},
+				[1] = {
+					.num = ST_ACCEL_FS_AVL_4G,
+					.value = 0x01,
+					.gain = IIO_G_TO_M_S_2(2000),
+				},
+				[2] = {
+					.num = ST_ACCEL_FS_AVL_8G,
+					.value = 0x03,
+					.gain = IIO_G_TO_M_S_2(3900),
+				},
+			},
+		},
+		.bdu = {
+			.addr = 0x23,
+			.mask = 0x80,
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x22,
+				.mask = 0x02,
+				.addr_od = 0x22,
+				.mask_od = 0x40,
+			},
+			.int2 = {
+				.addr = 0x22,
+				.mask = 0x10,
+				.addr_od = 0x22,
+				.mask_od = 0x40,
+			},
+			.addr_ihl = 0x22,
+			.mask_ihl = 0x80,
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x07,
+			},
+		},
+		.sim = {
+			.addr = 0x23,
+			.value = BIT(0),
+		},
+		.multi_read_bit = true,
+		.bootime = 2,
+	},
+	{
+		.wai = 0x40,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+		.sensors_supported = {
+			[0] = LSM330_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_16bit_channels,
+		.odr = {
+			.addr = 0x20,
+			.mask = 0xf0,
+			.odr_avl = {
+				{ .hz = 3, .value = 0x01, },
+				{ .hz = 6, .value = 0x02, },
+				{ .hz = 12, .value = 0x03, },
+				{ .hz = 25, .value = 0x04, },
+				{ .hz = 50, .value = 0x05, },
+				{ .hz = 100, .value = 0x06, },
+				{ .hz = 200, .value = 0x07, },
+				{ .hz = 400, .value = 0x08, },
+				{ .hz = 800, .value = 0x09, },
+				{ .hz = 1600, .value = 0x0a, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0xf0,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.addr = 0x24,
+			.mask = 0x38,
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.value = 0x00,
+					.gain = IIO_G_TO_M_S_2(61),
+				},
+				[1] = {
+					.num = ST_ACCEL_FS_AVL_4G,
+					.value = 0x01,
+					.gain = IIO_G_TO_M_S_2(122),
+				},
+				[2] = {
+					.num = ST_ACCEL_FS_AVL_6G,
+					.value = 0x02,
+					.gain = IIO_G_TO_M_S_2(183),
+				},
+				[3] = {
+					.num = ST_ACCEL_FS_AVL_8G,
+					.value = 0x03,
+					.gain = IIO_G_TO_M_S_2(244),
+				},
+				[4] = {
+					.num = ST_ACCEL_FS_AVL_16G,
+					.value = 0x04,
+					.gain = IIO_G_TO_M_S_2(732),
+				},
+			},
+		},
+		.bdu = {
+			.addr = 0x20,
+			.mask = 0x08,
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x23,
+				.mask = 0x80,
+			},
+			.addr_ihl = 0x23,
+			.mask_ihl = 0x40,
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x07,
+			},
+			.ig1 = {
+				.en_addr = 0x23,
+				.en_mask = 0x08,
+			},
+		},
+		.sim = {
+			.addr = 0x24,
+			.value = BIT(0),
+		},
+		.multi_read_bit = false,
+		.bootime = 2,
+	},
+	{
+		.wai = 0x3a,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+		.sensors_supported = {
+			[0] = LIS3LV02DL_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
+		.odr = {
+			.addr = 0x20,
+			.mask = 0x30, /* DF1 and DF0 */
+			.odr_avl = {
+				{ .hz = 40, .value = 0x00, },
+				{ .hz = 160, .value = 0x01, },
+				{ .hz = 640, .value = 0x02, },
+				{ .hz = 2560, .value = 0x03, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0xc0,
+			.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.addr = 0x21,
+			.mask = 0x80,
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.value = 0x00,
+					.gain = IIO_G_TO_M_S_2(1000),
+				},
+				[1] = {
+					.num = ST_ACCEL_FS_AVL_6G,
+					.value = 0x01,
+					.gain = IIO_G_TO_M_S_2(3000),
+				},
+			},
+		},
+		.bdu = {
+			.addr = 0x21,
+			.mask = 0x40,
+		},
+		/*
+		 * Data Alignment Setting - needs to be set to get
+		 * left-justified data like all other sensors.
+		 */
+		.das = {
+			.addr = 0x21,
+			.mask = 0x01,
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x21,
+				.mask = 0x04,
+			},
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x07,
+			},
+		},
+		.sim = {
+			.addr = 0x21,
+			.value = BIT(1),
+		},
+		.multi_read_bit = true,
+		.bootime = 2, /* guess */
+	},
+	{
+		.wai = 0x3b,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+		.sensors_supported = {
+			[0] = LIS331DL_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_8bit_channels,
+		.odr = {
+			.addr = 0x20,
+			.mask = 0x80,
+			.odr_avl = {
+				{ .hz = 100, .value = 0x00, },
+				{ .hz = 400, .value = 0x01, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0x40,
+			.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.addr = 0x20,
+			.mask = 0x20,
+			/*
+			 * TODO: check these resulting gain settings, these are
+			 * not in the datsheet
+			 */
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.value = 0x00,
+					.gain = IIO_G_TO_M_S_2(18000),
+				},
+				[1] = {
+					.num = ST_ACCEL_FS_AVL_8G,
+					.value = 0x01,
+					.gain = IIO_G_TO_M_S_2(72000),
+				},
+			},
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x22,
+				.mask = 0x04,
+				.addr_od = 0x22,
+				.mask_od = 0x40,
+			},
+			.int2 = {
+				.addr = 0x22,
+				.mask = 0x20,
+				.addr_od = 0x22,
+				.mask_od = 0x40,
+			},
+			.addr_ihl = 0x22,
+			.mask_ihl = 0x80,
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x07,
+			},
+		},
+		.sim = {
+			.addr = 0x21,
+			.value = BIT(7),
+		},
+		.multi_read_bit = false,
+		.bootime = 2, /* guess */
+	},
+	{
+		.wai = 0x32,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+		.sensors_supported = {
+			[0] = H3LIS331DL_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
+		.odr = {
+			.addr = 0x20,
+			.mask = 0x18,
+			.odr_avl = {
+				{ .hz = 50, .value = 0x00, },
+				{ .hz = 100, .value = 0x01, },
+				{ .hz = 400, .value = 0x02, },
+				{ .hz = 1000, .value = 0x03, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0x20,
+			.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.addr = 0x23,
+			.mask = 0x30,
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_100G,
+					.value = 0x00,
+					.gain = IIO_G_TO_M_S_2(49000),
+				},
+				[1] = {
+					.num = ST_ACCEL_FS_AVL_200G,
+					.value = 0x01,
+					.gain = IIO_G_TO_M_S_2(98000),
+				},
+				[2] = {
+					.num = ST_ACCEL_FS_AVL_400G,
+					.value = 0x03,
+					.gain = IIO_G_TO_M_S_2(195000),
+				},
+			},
+		},
+		.bdu = {
+			.addr = 0x23,
+			.mask = 0x80,
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x22,
+				.mask = 0x02,
+			},
+			.int2 = {
+				.addr = 0x22,
+				.mask = 0x10,
+			},
+			.addr_ihl = 0x22,
+			.mask_ihl = 0x80,
+		},
+		.sim = {
+			.addr = 0x23,
+			.value = BIT(0),
+		},
+		.multi_read_bit = true,
+		.bootime = 2,
+	},
+	{
+		/* No WAI register present */
+		.sensors_supported = {
+			[0] = LIS3L02DQ_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
+		.odr = {
+			.addr = 0x20,
+			.mask = 0x30,
+			.odr_avl = {
+				{ .hz = 280, .value = 0x00, },
+				{ .hz = 560, .value = 0x01, },
+				{ .hz = 1120, .value = 0x02, },
+				{ .hz = 4480, .value = 0x03, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0xc0,
+			.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.gain = IIO_G_TO_M_S_2(488),
+				},
+			},
+		},
+		/*
+		 * The part has a BDU bit but if set the data is never
+		 * updated so don't set it.
+		 */
+		.bdu = {
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x21,
+				.mask = 0x04,
+			},
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x07,
+			},
+		},
+		.sim = {
+			.addr = 0x21,
+			.value = BIT(1),
+		},
+		.multi_read_bit = false,
+		.bootime = 2,
+	},
+	{
+		.wai = 0x33,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+		.sensors_supported = {
+			[0] = LNG2DM_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_8bit_channels,
+		.odr = {
+			.addr = 0x20,
+			.mask = 0xf0,
+			.odr_avl = {
+				{ .hz = 1, .value = 0x01, },
+				{ .hz = 10, .value = 0x02, },
+				{ .hz = 25, .value = 0x03, },
+				{ .hz = 50, .value = 0x04, },
+				{ .hz = 100, .value = 0x05, },
+				{ .hz = 200, .value = 0x06, },
+				{ .hz = 400, .value = 0x07, },
+				{ .hz = 1600, .value = 0x08, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0xf0,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.addr = 0x23,
+			.mask = 0x30,
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.value = 0x00,
+					.gain = IIO_G_TO_M_S_2(15600),
+				},
+				[1] = {
+					.num = ST_ACCEL_FS_AVL_4G,
+					.value = 0x01,
+					.gain = IIO_G_TO_M_S_2(31200),
+				},
+				[2] = {
+					.num = ST_ACCEL_FS_AVL_8G,
+					.value = 0x02,
+					.gain = IIO_G_TO_M_S_2(62500),
+				},
+				[3] = {
+					.num = ST_ACCEL_FS_AVL_16G,
+					.value = 0x03,
+					.gain = IIO_G_TO_M_S_2(187500),
+				},
+			},
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x22,
+				.mask = 0x10,
+			},
+			.addr_ihl = 0x25,
+			.mask_ihl = 0x02,
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x07,
+			},
+		},
+		.sim = {
+			.addr = 0x23,
+			.value = BIT(0),
+		},
+		.multi_read_bit = true,
+		.bootime = 2,
+	},
+	{
+		.wai = 0x44,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+		.sensors_supported = {
+			[0] = LIS2DW12_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
+		.odr = {
+			.addr = 0x20,
+			.mask = 0xf0,
+			.odr_avl = {
+				{ .hz = 1, .value = 0x01, },
+				{ .hz = 12, .value = 0x02, },
+				{ .hz = 25, .value = 0x03, },
+				{ .hz = 50, .value = 0x04, },
+				{ .hz = 100, .value = 0x05, },
+				{ .hz = 200, .value = 0x06, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0xf0,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.fs = {
+			.addr = 0x25,
+			.mask = 0x30,
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.value = 0x00,
+					.gain = IIO_G_TO_M_S_2(976),
+				},
+				[1] = {
+					.num = ST_ACCEL_FS_AVL_4G,
+					.value = 0x01,
+					.gain = IIO_G_TO_M_S_2(1952),
+				},
+				[2] = {
+					.num = ST_ACCEL_FS_AVL_8G,
+					.value = 0x02,
+					.gain = IIO_G_TO_M_S_2(3904),
+				},
+				[3] = {
+					.num = ST_ACCEL_FS_AVL_16G,
+					.value = 0x03,
+					.gain = IIO_G_TO_M_S_2(7808),
+				},
+			},
+		},
+		.bdu = {
+			.addr = 0x21,
+			.mask = 0x08,
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x23,
+				.mask = 0x01,
+				.addr_od = 0x22,
+				.mask_od = 0x20,
+			},
+			.int2 = {
+				.addr = 0x24,
+				.mask = 0x01,
+				.addr_od = 0x22,
+				.mask_od = 0x20,
+			},
+			.addr_ihl = 0x22,
+			.mask_ihl = 0x08,
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x01,
+			},
+		},
+		.sim = {
+			.addr = 0x21,
+			.value = BIT(0),
+		},
+		.multi_read_bit = false,
+		.bootime = 2,
+	},
+	{
+		.wai = 0x11,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+		.sensors_supported = {
+			[0] = LIS3DHH_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_16bit_channels,
+		.odr = {
+			/* just ODR = 1100Hz available */
+			.odr_avl = {
+				{ .hz = 1100, .value = 0x00, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0x80,
+			.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.fs = {
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.gain = IIO_G_TO_M_S_2(76),
+				},
+			},
+		},
+		.bdu = {
+			.addr = 0x20,
+			.mask = 0x01,
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x21,
+				.mask = 0x80,
+				.addr_od = 0x23,
+				.mask_od = 0x04,
+			},
+			.int2 = {
+				.addr = 0x22,
+				.mask = 0x80,
+				.addr_od = 0x23,
+				.mask_od = 0x08,
+			},
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x07,
+			},
+		},
+		.multi_read_bit = false,
+		.bootime = 2,
+	},
+	{
+		.wai = 0x33,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+		.sensors_supported = {
+			[0] = LIS2DE12_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_8bit_channels,
+		.odr = {
+			.addr = 0x20,
+			.mask = 0xf0,
+			.odr_avl = {
+				{ .hz = 1, .value = 0x01, },
+				{ .hz = 10, .value = 0x02, },
+				{ .hz = 25, .value = 0x03, },
+				{ .hz = 50, .value = 0x04, },
+				{ .hz = 100, .value = 0x05, },
+				{ .hz = 200, .value = 0x06, },
+				{ .hz = 400, .value = 0x07, },
+				{ .hz = 1620, .value = 0x08, },
+				{ .hz = 5376, .value = 0x09, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0xf0,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.addr = 0x23,
+			.mask = 0x30,
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.value = 0x00,
+					.gain = IIO_G_TO_M_S_2(15600),
+				},
+				[1] = {
+					.num = ST_ACCEL_FS_AVL_4G,
+					.value = 0x01,
+					.gain = IIO_G_TO_M_S_2(31200),
+				},
+				[2] = {
+					.num = ST_ACCEL_FS_AVL_8G,
+					.value = 0x02,
+					.gain = IIO_G_TO_M_S_2(62500),
+				},
+				[3] = {
+					.num = ST_ACCEL_FS_AVL_16G,
+					.value = 0x03,
+					.gain = IIO_G_TO_M_S_2(187500),
+				},
+			},
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x22,
+				.mask = 0x10,
+			},
+			.addr_ihl = 0x25,
+			.mask_ihl = 0x02,
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x07,
+			},
+		},
+		.sim = {
+			.addr = 0x23,
+			.value = BIT(0),
+		},
+		.multi_read_bit = true,
+		.bootime = 2,
+	},
+	{
+		.wai = 0x41,
+		.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+		.sensors_supported = {
+			[0] = LIS2HH12_ACCEL_DEV_NAME,
+		},
+		.ch = (struct iio_chan_spec *)st_accel_16bit_channels,
+		.odr = {
+			.addr = 0x20,
+			.mask = 0x70,
+			.odr_avl = {
+				{ .hz = 10, .value = 0x01, },
+				{ .hz = 50, .value = 0x02, },
+				{ .hz = 100, .value = 0x03, },
+				{ .hz = 200, .value = 0x04, },
+				{ .hz = 400, .value = 0x05, },
+				{ .hz = 800, .value = 0x06, },
+			},
+		},
+		.pw = {
+			.addr = 0x20,
+			.mask = 0x70,
+			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+		},
+		.enable_axis = {
+			.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+			.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+		},
+		.fs = {
+			.addr = 0x23,
+			.mask = 0x30,
+			.fs_avl = {
+				[0] = {
+					.num = ST_ACCEL_FS_AVL_2G,
+					.value = 0x00,
+					.gain = IIO_G_TO_M_S_2(61),
+				},
+				[1] = {
+					.num = ST_ACCEL_FS_AVL_4G,
+					.value = 0x02,
+					.gain = IIO_G_TO_M_S_2(122),
+				},
+				[2] = {
+					.num = ST_ACCEL_FS_AVL_8G,
+					.value = 0x03,
+					.gain = IIO_G_TO_M_S_2(244),
+				},
+			},
+		},
+		.bdu = {
+			.addr = 0x20,
+			.mask = 0x08,
+		},
+		.drdy_irq = {
+			.int1 = {
+				.addr = 0x22,
+				.mask = 0x01,
+			},
+			.int2 = {
+				.addr = 0x25,
+				.mask = 0x01,
+			},
+			.addr_ihl = 0x24,
+			.mask_ihl = 0x02,
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x07,
+			},
+		},
+		.sim = {
+			.addr = 0x23,
+			.value = BIT(0),
+		},
+		.multi_read_bit = true,
+		.bootime = 2,
+	},
+
+};
+
+static int st_accel_read_raw(struct iio_dev *indio_dev,
+			struct iio_chan_spec const *ch, int *val,
+							int *val2, long mask)
+{
+	int err;
+	struct st_sensor_data *adata = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		err = st_sensors_read_info_raw(indio_dev, ch, val);
+		if (err < 0)
+			goto read_error;
+
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = adata->current_fullscale->gain / 1000000;
+		*val2 = adata->current_fullscale->gain % 1000000;
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		*val = adata->odr;
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+
+read_error:
+	return err;
+}
+
+static int st_accel_write_raw(struct iio_dev *indio_dev,
+		struct iio_chan_spec const *chan, int val, int val2, long mask)
+{
+	int err;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE: {
+		int gain;
+
+		gain = val * 1000000 + val2;
+		err = st_sensors_set_fullscale_by_gain(indio_dev, gain);
+		break;
+	}
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		if (val2)
+			return -EINVAL;
+		mutex_lock(&indio_dev->mlock);
+		err = st_sensors_set_odr(indio_dev, val);
+		mutex_unlock(&indio_dev->mlock);
+		return err;
+	default:
+		return -EINVAL;
+	}
+
+	return err;
+}
+
+static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
+static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
+
+static struct attribute *st_accel_attributes[] = {
+	&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+	&iio_dev_attr_in_accel_scale_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group st_accel_attribute_group = {
+	.attrs = st_accel_attributes,
+};
+
+static const struct iio_info accel_info = {
+	.attrs = &st_accel_attribute_group,
+	.read_raw = &st_accel_read_raw,
+	.write_raw = &st_accel_write_raw,
+	.debugfs_reg_access = &st_sensors_debugfs_reg_access,
+};
+
+#ifdef CONFIG_IIO_TRIGGER
+static const struct iio_trigger_ops st_accel_trigger_ops = {
+	.set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
+	.validate_device = st_sensors_validate_device,
+};
+#define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
+#else
+#define ST_ACCEL_TRIGGER_OPS NULL
+#endif
+
+#ifdef CONFIG_ACPI
+static const struct iio_mount_matrix *
+get_mount_matrix(const struct iio_dev *indio_dev,
+		 const struct iio_chan_spec *chan)
+{
+	struct st_sensor_data *adata = iio_priv(indio_dev);
+
+	return adata->mount_matrix;
+}
+
+static const struct iio_chan_spec_ext_info mount_matrix_ext_info[] = {
+	IIO_MOUNT_MATRIX(IIO_SHARED_BY_ALL, get_mount_matrix),
+	{ },
+};
+
+/* Read ST-specific _ONT orientation data from ACPI and generate an
+ * appropriate mount matrix.
+ */
+static int apply_acpi_orientation(struct iio_dev *indio_dev,
+				  struct iio_chan_spec *channels)
+{
+	struct st_sensor_data *adata = iio_priv(indio_dev);
+	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+	struct acpi_device *adev;
+	union acpi_object *ont;
+	union acpi_object *elements;
+	acpi_status status;
+	int ret = -EINVAL;
+	unsigned int val;
+	int i, j;
+	int final_ont[3][3] = { { 0 }, };
+
+	/* For some reason, ST's _ONT translation does not apply directly
+	 * to the data read from the sensor. Another translation must be
+	 * performed first, as described by the matrix below. Perhaps
+	 * ST required this specific translation for the first product
+	 * where the device was mounted?
+	 */
+	const int default_ont[3][3] = {
+		{  0,  1,  0 },
+		{ -1,  0,  0 },
+		{  0,  0, -1 },
+	};
+
+
+	adev = ACPI_COMPANION(adata->dev);
+	if (!adev)
+		return 0;
+
+	/* Read _ONT data, which should be a package of 6 integers. */
+	status = acpi_evaluate_object(adev->handle, "_ONT", NULL, &buffer);
+	if (status == AE_NOT_FOUND) {
+		return 0;
+	} else if (ACPI_FAILURE(status)) {
+		dev_warn(&indio_dev->dev, "failed to execute _ONT: %d\n",
+			 status);
+		return status;
+	}
+
+	ont = buffer.pointer;
+	if (ont->type != ACPI_TYPE_PACKAGE || ont->package.count != 6)
+		goto out;
+
+	/* The first 3 integers provide axis order information.
+	 * e.g. 0 1 2 would indicate normal X,Y,Z ordering.
+	 * e.g. 1 0 2 indicates that data arrives in order Y,X,Z.
+	 */
+	elements = ont->package.elements;
+	for (i = 0; i < 3; i++) {
+		if (elements[i].type != ACPI_TYPE_INTEGER)
+			goto out;
+
+		val = elements[i].integer.value;
+		if (val > 2)
+			goto out;
+
+		/* Avoiding full matrix multiplication, we simply reorder the
+		 * columns in the default_ont matrix according to the
+		 * ordering provided by _ONT.
+		 */
+		final_ont[0][i] = default_ont[0][val];
+		final_ont[1][i] = default_ont[1][val];
+		final_ont[2][i] = default_ont[2][val];
+	}
+
+	/* The final 3 integers provide sign flip information.
+	 * 0 means no change, 1 means flip.
+	 * e.g. 0 0 1 means that Z data should be sign-flipped.
+	 * This is applied after the axis reordering from above.
+	 */
+	elements += 3;
+	for (i = 0; i < 3; i++) {
+		if (elements[i].type != ACPI_TYPE_INTEGER)
+			goto out;
+
+		val = elements[i].integer.value;
+		if (val != 0 && val != 1)
+			goto out;
+		if (!val)
+			continue;
+
+		/* Flip the values in the indicated column */
+		final_ont[0][i] *= -1;
+		final_ont[1][i] *= -1;
+		final_ont[2][i] *= -1;
+	}
+
+	/* Convert our integer matrix to a string-based iio_mount_matrix */
+	adata->mount_matrix = devm_kmalloc(&indio_dev->dev,
+					   sizeof(*adata->mount_matrix),
+					   GFP_KERNEL);
+	if (!adata->mount_matrix) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	for (i = 0; i < 3; i++) {
+		for (j = 0; j < 3; j++) {
+			int matrix_val = final_ont[i][j];
+			char *str_value;
+
+			switch (matrix_val) {
+			case -1:
+				str_value = "-1";
+				break;
+			case 0:
+				str_value = "0";
+				break;
+			case 1:
+				str_value = "1";
+				break;
+			default:
+				goto out;
+			}
+			adata->mount_matrix->rotation[i * 3 + j] = str_value;
+		}
+	}
+
+	/* Expose the mount matrix via ext_info */
+	for (i = 0; i < indio_dev->num_channels; i++)
+		channels[i].ext_info = mount_matrix_ext_info;
+
+	ret = 0;
+	dev_info(&indio_dev->dev, "computed mount matrix from ACPI\n");
+
+out:
+	kfree(buffer.pointer);
+	return ret;
+}
+#else /* !CONFIG_ACPI */
+static int apply_acpi_orientation(struct iio_dev *indio_dev,
+				  struct iio_chan_spec *channels)
+{
+	return 0;
+}
+#endif
+
+/*
+ * st_accel_get_settings() - get sensor settings from device name
+ * @name: device name buffer reference.
+ *
+ * Return: valid reference on success, NULL otherwise.
+ */
+const struct st_sensor_settings *st_accel_get_settings(const char *name)
+{
+	int index = st_sensors_get_settings_index(name,
+					st_accel_sensors_settings,
+					ARRAY_SIZE(st_accel_sensors_settings));
+	if (index < 0)
+		return NULL;
+
+	return &st_accel_sensors_settings[index];
+}
+EXPORT_SYMBOL(st_accel_get_settings);
+
+int st_accel_common_probe(struct iio_dev *indio_dev)
+{
+	struct st_sensor_data *adata = iio_priv(indio_dev);
+	struct st_sensors_platform_data *pdata = dev_get_platdata(adata->dev);
+	struct iio_chan_spec *channels;
+	size_t channels_size;
+	int err;
+
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &accel_info;
+
+	err = st_sensors_verify_id(indio_dev);
+	if (err < 0)
+		return err;
+
+	adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
+	indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
+
+	channels_size = indio_dev->num_channels * sizeof(struct iio_chan_spec);
+	channels = devm_kmemdup(&indio_dev->dev,
+				adata->sensor_settings->ch,
+				channels_size, GFP_KERNEL);
+	if (!channels)
+		return -ENOMEM;
+
+	if (apply_acpi_orientation(indio_dev, channels))
+		dev_warn(&indio_dev->dev,
+			 "failed to apply ACPI orientation data: %d\n", err);
+
+	indio_dev->channels = channels;
+	adata->current_fullscale = &adata->sensor_settings->fs.fs_avl[0];
+	adata->odr = adata->sensor_settings->odr.odr_avl[0].hz;
+
+	if (!pdata)
+		pdata = (struct st_sensors_platform_data *)&default_accel_pdata;
+
+	err = st_sensors_init_sensor(indio_dev, pdata);
+	if (err < 0)
+		return err;
+
+	err = st_accel_allocate_ring(indio_dev);
+	if (err < 0)
+		return err;
+
+	if (adata->irq > 0) {
+		err = st_sensors_allocate_trigger(indio_dev,
+						 ST_ACCEL_TRIGGER_OPS);
+		if (err < 0)
+			goto st_accel_probe_trigger_error;
+	}
+
+	err = iio_device_register(indio_dev);
+	if (err)
+		goto st_accel_device_register_error;
+
+	dev_info(&indio_dev->dev, "registered accelerometer %s\n",
+		 indio_dev->name);
+
+	return 0;
+
+st_accel_device_register_error:
+	if (adata->irq > 0)
+		st_sensors_deallocate_trigger(indio_dev);
+st_accel_probe_trigger_error:
+	st_accel_deallocate_ring(indio_dev);
+	return err;
+}
+EXPORT_SYMBOL(st_accel_common_probe);
+
+void st_accel_common_remove(struct iio_dev *indio_dev)
+{
+	struct st_sensor_data *adata = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+	if (adata->irq > 0)
+		st_sensors_deallocate_trigger(indio_dev);
+
+	st_accel_deallocate_ring(indio_dev);
+}
+EXPORT_SYMBOL(st_accel_common_remove);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/st_accel_i2c.c b/drivers/iio/accel/st_accel_i2c.c
new file mode 100644
index 000000000..02c823b93
--- /dev/null
+++ b/drivers/iio/accel/st_accel_i2c.c
@@ -0,0 +1,218 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * STMicroelectronics accelerometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/property.h>
+
+#include <linux/iio/common/st_sensors_i2c.h>
+#include "st_accel.h"
+
+static const struct of_device_id st_accel_of_match[] = {
+	{
+		/* An older compatible */
+		.compatible = "st,lis3lv02d",
+		.data = LIS3LV02DL_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis3lv02dl-accel",
+		.data = LIS3LV02DL_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm303dlh-accel",
+		.data = LSM303DLH_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm303dlhc-accel",
+		.data = LSM303DLHC_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis3dh-accel",
+		.data = LIS3DH_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm330d-accel",
+		.data = LSM330D_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm330dl-accel",
+		.data = LSM330DL_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm330dlc-accel",
+		.data = LSM330DLC_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis331dl-accel",
+		.data = LIS331DL_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis331dlh-accel",
+		.data = LIS331DLH_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm303dl-accel",
+		.data = LSM303DL_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm303dlm-accel",
+		.data = LSM303DLM_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm330-accel",
+		.data = LSM330_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm303agr-accel",
+		.data = LSM303AGR_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis2dh12-accel",
+		.data = LIS2DH12_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,h3lis331dl-accel",
+		.data = H3LIS331DL_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis3l02dq",
+		.data = LIS3L02DQ_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lng2dm-accel",
+		.data = LNG2DM_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis2dw12",
+		.data = LIS2DW12_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis3de",
+		.data = LIS3DE_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis2de12",
+		.data = LIS2DE12_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis2hh12",
+		.data = LIS2HH12_ACCEL_DEV_NAME,
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, st_accel_of_match);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id st_accel_acpi_match[] = {
+	{"SMO8840", (kernel_ulong_t)LIS2DH12_ACCEL_DEV_NAME},
+	{"SMO8A90", (kernel_ulong_t)LNG2DM_ACCEL_DEV_NAME},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, st_accel_acpi_match);
+#endif
+
+static const struct i2c_device_id st_accel_id_table[] = {
+	{ LSM303DLH_ACCEL_DEV_NAME },
+	{ LSM303DLHC_ACCEL_DEV_NAME },
+	{ LIS3DH_ACCEL_DEV_NAME },
+	{ LSM330D_ACCEL_DEV_NAME },
+	{ LSM330DL_ACCEL_DEV_NAME },
+	{ LSM330DLC_ACCEL_DEV_NAME },
+	{ LIS331DLH_ACCEL_DEV_NAME },
+	{ LSM303DL_ACCEL_DEV_NAME },
+	{ LSM303DLM_ACCEL_DEV_NAME },
+	{ LSM330_ACCEL_DEV_NAME },
+	{ LSM303AGR_ACCEL_DEV_NAME },
+	{ LIS2DH12_ACCEL_DEV_NAME },
+	{ LIS3L02DQ_ACCEL_DEV_NAME },
+	{ LNG2DM_ACCEL_DEV_NAME },
+	{ H3LIS331DL_ACCEL_DEV_NAME },
+	{ LIS331DL_ACCEL_DEV_NAME },
+	{ LIS3LV02DL_ACCEL_DEV_NAME },
+	{ LIS2DW12_ACCEL_DEV_NAME },
+	{ LIS3DE_ACCEL_DEV_NAME },
+	{ LIS2DE12_ACCEL_DEV_NAME },
+	{ LIS2HH12_ACCEL_DEV_NAME },
+	{},
+};
+MODULE_DEVICE_TABLE(i2c, st_accel_id_table);
+
+static int st_accel_i2c_probe(struct i2c_client *client)
+{
+	const struct st_sensor_settings *settings;
+	struct st_sensor_data *adata;
+	struct iio_dev *indio_dev;
+	int ret;
+
+	st_sensors_dev_name_probe(&client->dev, client->name, sizeof(client->name));
+
+	settings = st_accel_get_settings(client->name);
+	if (!settings) {
+		dev_err(&client->dev, "device name %s not recognized.\n",
+			client->name);
+		return -ENODEV;
+	}
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*adata));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	adata = iio_priv(indio_dev);
+	adata->sensor_settings = (struct st_sensor_settings *)settings;
+
+	ret = st_sensors_i2c_configure(indio_dev, client);
+	if (ret < 0)
+		return ret;
+
+	ret = st_sensors_power_enable(indio_dev);
+	if (ret)
+		return ret;
+
+	ret = st_accel_common_probe(indio_dev);
+	if (ret < 0)
+		goto st_accel_power_off;
+
+	return 0;
+
+st_accel_power_off:
+	st_sensors_power_disable(indio_dev);
+
+	return ret;
+}
+
+static int st_accel_i2c_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+	st_accel_common_remove(indio_dev);
+
+	st_sensors_power_disable(indio_dev);
+
+	return 0;
+}
+
+static struct i2c_driver st_accel_driver = {
+	.driver = {
+		.name = "st-accel-i2c",
+		.of_match_table = st_accel_of_match,
+		.acpi_match_table = ACPI_PTR(st_accel_acpi_match),
+	},
+	.probe_new = st_accel_i2c_probe,
+	.remove = st_accel_i2c_remove,
+	.id_table = st_accel_id_table,
+};
+module_i2c_driver(st_accel_driver);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics accelerometers i2c driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/st_accel_spi.c b/drivers/iio/accel/st_accel_spi.c
new file mode 100644
index 000000000..386ae18d5
--- /dev/null
+++ b/drivers/iio/accel/st_accel_spi.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * STMicroelectronics accelerometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/iio/iio.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include <linux/iio/common/st_sensors_spi.h>
+#include "st_accel.h"
+
+/*
+ * For new single-chip sensors use <device_name> as compatible string.
+ * For old single-chip devices keep <device_name>-accel to maintain
+ * compatibility
+ */
+static const struct of_device_id st_accel_of_match[] = {
+	{
+		/* An older compatible */
+		.compatible = "st,lis302dl-spi",
+		.data = LIS3LV02DL_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis3lv02dl-accel",
+		.data = LIS3LV02DL_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis3dh-accel",
+		.data = LIS3DH_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm330d-accel",
+		.data = LSM330D_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm330dl-accel",
+		.data = LSM330DL_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm330dlc-accel",
+		.data = LSM330DLC_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis331dlh-accel",
+		.data = LIS331DLH_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm330-accel",
+		.data = LSM330_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lsm303agr-accel",
+		.data = LSM303AGR_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis2dh12-accel",
+		.data = LIS2DH12_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis3l02dq",
+		.data = LIS3L02DQ_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lng2dm-accel",
+		.data = LNG2DM_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,h3lis331dl-accel",
+		.data = H3LIS331DL_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis331dl-accel",
+		.data = LIS331DL_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis2dw12",
+		.data = LIS2DW12_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis3dhh",
+		.data = LIS3DHH_ACCEL_DEV_NAME,
+	},
+	{
+		.compatible = "st,lis3de",
+		.data = LIS3DE_ACCEL_DEV_NAME,
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, st_accel_of_match);
+
+static int st_accel_spi_probe(struct spi_device *spi)
+{
+	const struct st_sensor_settings *settings;
+	struct st_sensor_data *adata;
+	struct iio_dev *indio_dev;
+	int err;
+
+	st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
+
+	settings = st_accel_get_settings(spi->modalias);
+	if (!settings) {
+		dev_err(&spi->dev, "device name %s not recognized.\n",
+			spi->modalias);
+		return -ENODEV;
+	}
+
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adata));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	adata = iio_priv(indio_dev);
+	adata->sensor_settings = (struct st_sensor_settings *)settings;
+
+	err = st_sensors_spi_configure(indio_dev, spi);
+	if (err < 0)
+		return err;
+
+	err = st_sensors_power_enable(indio_dev);
+	if (err)
+		return err;
+
+	err = st_accel_common_probe(indio_dev);
+	if (err < 0)
+		goto st_accel_power_off;
+
+	return 0;
+
+st_accel_power_off:
+	st_sensors_power_disable(indio_dev);
+
+	return err;
+}
+
+static int st_accel_spi_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+
+	st_accel_common_remove(indio_dev);
+
+	st_sensors_power_disable(indio_dev);
+
+	return 0;
+}
+
+static const struct spi_device_id st_accel_id_table[] = {
+	{ LIS3DH_ACCEL_DEV_NAME },
+	{ LSM330D_ACCEL_DEV_NAME },
+	{ LSM330DL_ACCEL_DEV_NAME },
+	{ LSM330DLC_ACCEL_DEV_NAME },
+	{ LIS331DLH_ACCEL_DEV_NAME },
+	{ LSM330_ACCEL_DEV_NAME },
+	{ LSM303AGR_ACCEL_DEV_NAME },
+	{ LIS2DH12_ACCEL_DEV_NAME },
+	{ LIS3L02DQ_ACCEL_DEV_NAME },
+	{ LNG2DM_ACCEL_DEV_NAME },
+	{ H3LIS331DL_ACCEL_DEV_NAME },
+	{ LIS331DL_ACCEL_DEV_NAME },
+	{ LIS3LV02DL_ACCEL_DEV_NAME },
+	{ LIS2DW12_ACCEL_DEV_NAME },
+	{ LIS3DHH_ACCEL_DEV_NAME },
+	{ LIS3DE_ACCEL_DEV_NAME },
+	{},
+};
+MODULE_DEVICE_TABLE(spi, st_accel_id_table);
+
+static struct spi_driver st_accel_driver = {
+	.driver = {
+		.name = "st-accel-spi",
+		.of_match_table = st_accel_of_match,
+	},
+	.probe = st_accel_spi_probe,
+	.remove = st_accel_spi_remove,
+	.id_table = st_accel_id_table,
+};
+module_spi_driver(st_accel_driver);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics accelerometers spi driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/stk8312.c b/drivers/iio/accel/stk8312.c
new file mode 100644
index 000000000..7d24801e8
--- /dev/null
+++ b/drivers/iio/accel/stk8312.c
@@ -0,0 +1,670 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**
+ * Sensortek STK8312 3-Axis Accelerometer
+ *
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * IIO driver for STK8312; 7-bit I2C address: 0x3D.
+ */
+
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+
+#define STK8312_REG_XOUT		0x00
+#define STK8312_REG_YOUT		0x01
+#define STK8312_REG_ZOUT		0x02
+#define STK8312_REG_INTSU		0x06
+#define STK8312_REG_MODE		0x07
+#define STK8312_REG_SR			0x08
+#define STK8312_REG_STH			0x13
+#define STK8312_REG_RESET		0x20
+#define STK8312_REG_AFECTRL		0x24
+#define STK8312_REG_OTPADDR		0x3D
+#define STK8312_REG_OTPDATA		0x3E
+#define STK8312_REG_OTPCTRL		0x3F
+
+#define STK8312_MODE_ACTIVE		BIT(0)
+#define STK8312_MODE_STANDBY		0x00
+#define STK8312_MODE_INT_AH_PP		0xC0	/* active-high, push-pull */
+#define STK8312_DREADY_BIT		BIT(4)
+#define STK8312_RNG_6G			1
+#define STK8312_RNG_SHIFT		6
+#define STK8312_RNG_MASK		GENMASK(7, 6)
+#define STK8312_SR_MASK			GENMASK(2, 0)
+#define STK8312_SR_400HZ_IDX		0
+#define STK8312_ALL_CHANNEL_MASK	GENMASK(2, 0)
+#define STK8312_ALL_CHANNEL_SIZE	3
+
+#define STK8312_DRIVER_NAME		"stk8312"
+#define STK8312_IRQ_NAME		"stk8312_event"
+
+/*
+ * The accelerometer has two measurement ranges:
+ *
+ * -6g - +6g (8-bit, signed)
+ * -16g - +16g (8-bit, signed)
+ *
+ * scale1 = (6 + 6) * 9.81 / (2^8 - 1)     = 0.4616
+ * scale2 = (16 + 16) * 9.81 / (2^8 - 1)   = 1.2311
+ */
+#define STK8312_SCALE_AVAIL		"0.4616 1.2311"
+
+static const int stk8312_scale_table[][2] = {
+	{0, 461600}, {1, 231100}
+};
+
+static const struct {
+	int val;
+	int val2;
+} stk8312_samp_freq_table[] = {
+	{400, 0}, {200, 0}, {100, 0}, {50, 0}, {25, 0},
+	{12, 500000}, {6, 250000}, {3, 125000}
+};
+
+#define STK8312_ACCEL_CHANNEL(index, reg, axis) {			\
+	.type = IIO_ACCEL,						\
+	.address = reg,							\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
+				    BIT(IIO_CHAN_INFO_SAMP_FREQ),	\
+	.scan_index = index,						\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 8,						\
+		.storagebits = 8,					\
+		.endianness = IIO_CPU,					\
+	},								\
+}
+
+static const struct iio_chan_spec stk8312_channels[] = {
+	STK8312_ACCEL_CHANNEL(0, STK8312_REG_XOUT, X),
+	STK8312_ACCEL_CHANNEL(1, STK8312_REG_YOUT, Y),
+	STK8312_ACCEL_CHANNEL(2, STK8312_REG_ZOUT, Z),
+	IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+struct stk8312_data {
+	struct i2c_client *client;
+	struct mutex lock;
+	u8 range;
+	u8 sample_rate_idx;
+	u8 mode;
+	struct iio_trigger *dready_trig;
+	bool dready_trigger_on;
+	/* Ensure timestamp is naturally aligned */
+	struct {
+		s8 chans[3];
+		s64 timestamp __aligned(8);
+	} scan;
+};
+
+static IIO_CONST_ATTR(in_accel_scale_available, STK8312_SCALE_AVAIL);
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("3.125 6.25 12.5 25 50 100 200 400");
+
+static struct attribute *stk8312_attributes[] = {
+	&iio_const_attr_in_accel_scale_available.dev_attr.attr,
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group stk8312_attribute_group = {
+	.attrs = stk8312_attributes
+};
+
+static int stk8312_otp_init(struct stk8312_data *data)
+{
+	int ret;
+	int count = 10;
+	struct i2c_client *client = data->client;
+
+	ret = i2c_smbus_write_byte_data(client, STK8312_REG_OTPADDR, 0x70);
+	if (ret < 0)
+		goto exit_err;
+	ret = i2c_smbus_write_byte_data(client, STK8312_REG_OTPCTRL, 0x02);
+	if (ret < 0)
+		goto exit_err;
+
+	do {
+		usleep_range(1000, 5000);
+		ret = i2c_smbus_read_byte_data(client, STK8312_REG_OTPCTRL);
+		if (ret < 0)
+			goto exit_err;
+		count--;
+	} while (!(ret & BIT(7)) && count > 0);
+
+	if (count == 0) {
+		ret = -ETIMEDOUT;
+		goto exit_err;
+	}
+
+	ret = i2c_smbus_read_byte_data(client, STK8312_REG_OTPDATA);
+	if (ret == 0)
+		ret = -EINVAL;
+	if (ret < 0)
+		goto exit_err;
+
+	ret = i2c_smbus_write_byte_data(data->client, STK8312_REG_AFECTRL, ret);
+	if (ret < 0)
+		goto exit_err;
+	msleep(150);
+
+	return 0;
+
+exit_err:
+	dev_err(&client->dev, "failed to initialize sensor\n");
+	return ret;
+}
+
+static int stk8312_set_mode(struct stk8312_data *data, u8 mode)
+{
+	int ret;
+	struct i2c_client *client = data->client;
+
+	if (mode == data->mode)
+		return 0;
+
+	ret = i2c_smbus_write_byte_data(client, STK8312_REG_MODE, mode);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to change sensor mode\n");
+		return ret;
+	}
+
+	data->mode = mode;
+	if (mode & STK8312_MODE_ACTIVE) {
+		/* Need to run OTP sequence before entering active mode */
+		usleep_range(1000, 5000);
+		ret = stk8312_otp_init(data);
+	}
+
+	return ret;
+}
+
+static int stk8312_set_interrupts(struct stk8312_data *data, u8 int_mask)
+{
+	int ret;
+	u8 mode;
+	struct i2c_client *client = data->client;
+
+	mode = data->mode;
+	/* We need to go in standby mode to modify registers */
+	ret = stk8312_set_mode(data, STK8312_MODE_STANDBY);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(client, STK8312_REG_INTSU, int_mask);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to set interrupts\n");
+		stk8312_set_mode(data, mode);
+		return ret;
+	}
+
+	return stk8312_set_mode(data, mode);
+}
+
+static int stk8312_data_rdy_trigger_set_state(struct iio_trigger *trig,
+					      bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct stk8312_data *data = iio_priv(indio_dev);
+	int ret;
+
+	if (state)
+		ret = stk8312_set_interrupts(data, STK8312_DREADY_BIT);
+	else
+		ret = stk8312_set_interrupts(data, 0x00);
+
+	if (ret < 0) {
+		dev_err(&data->client->dev, "failed to set trigger state\n");
+		return ret;
+	}
+
+	data->dready_trigger_on = state;
+
+	return 0;
+}
+
+static const struct iio_trigger_ops stk8312_trigger_ops = {
+	.set_trigger_state = stk8312_data_rdy_trigger_set_state,
+};
+
+static int stk8312_set_sample_rate(struct stk8312_data *data, u8 rate)
+{
+	int ret;
+	u8 masked_reg;
+	u8 mode;
+	struct i2c_client *client = data->client;
+
+	if (rate == data->sample_rate_idx)
+		return 0;
+
+	mode = data->mode;
+	/* We need to go in standby mode to modify registers */
+	ret = stk8312_set_mode(data, STK8312_MODE_STANDBY);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(client, STK8312_REG_SR);
+	if (ret < 0)
+		goto err_activate;
+
+	masked_reg = (ret & (~STK8312_SR_MASK)) | rate;
+
+	ret = i2c_smbus_write_byte_data(client, STK8312_REG_SR, masked_reg);
+	if (ret < 0)
+		goto err_activate;
+
+	data->sample_rate_idx = rate;
+
+	return stk8312_set_mode(data, mode);
+
+err_activate:
+	dev_err(&client->dev, "failed to set sampling rate\n");
+	stk8312_set_mode(data, mode);
+
+	return ret;
+}
+
+static int stk8312_set_range(struct stk8312_data *data, u8 range)
+{
+	int ret;
+	u8 masked_reg;
+	u8 mode;
+	struct i2c_client *client = data->client;
+
+	if (range != 1 && range != 2)
+		return -EINVAL;
+	else if (range == data->range)
+		return 0;
+
+	mode = data->mode;
+	/* We need to go in standby mode to modify registers */
+	ret = stk8312_set_mode(data, STK8312_MODE_STANDBY);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(client, STK8312_REG_STH);
+	if (ret < 0)
+		goto err_activate;
+
+	masked_reg = ret & (~STK8312_RNG_MASK);
+	masked_reg |= range << STK8312_RNG_SHIFT;
+
+	ret = i2c_smbus_write_byte_data(client, STK8312_REG_STH, masked_reg);
+	if (ret < 0)
+		goto err_activate;
+
+	data->range = range;
+
+	return stk8312_set_mode(data, mode);
+
+err_activate:
+	dev_err(&client->dev, "failed to change sensor range\n");
+	stk8312_set_mode(data, mode);
+
+	return ret;
+}
+
+static int stk8312_read_accel(struct stk8312_data *data, u8 address)
+{
+	int ret;
+	struct i2c_client *client = data->client;
+
+	if (address > 2)
+		return -EINVAL;
+
+	ret = i2c_smbus_read_byte_data(client, address);
+	if (ret < 0)
+		dev_err(&client->dev, "register read failed\n");
+
+	return ret;
+}
+
+static int stk8312_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long mask)
+{
+	struct stk8312_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (iio_buffer_enabled(indio_dev))
+			return -EBUSY;
+		mutex_lock(&data->lock);
+		ret = stk8312_set_mode(data, data->mode | STK8312_MODE_ACTIVE);
+		if (ret < 0) {
+			mutex_unlock(&data->lock);
+			return ret;
+		}
+		ret = stk8312_read_accel(data, chan->address);
+		if (ret < 0) {
+			stk8312_set_mode(data,
+					 data->mode & (~STK8312_MODE_ACTIVE));
+			mutex_unlock(&data->lock);
+			return ret;
+		}
+		*val = sign_extend32(ret, 7);
+		ret = stk8312_set_mode(data,
+				       data->mode & (~STK8312_MODE_ACTIVE));
+		mutex_unlock(&data->lock);
+		if (ret < 0)
+			return ret;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = stk8312_scale_table[data->range - 1][0];
+		*val2 = stk8312_scale_table[data->range - 1][1];
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		*val = stk8312_samp_freq_table[data->sample_rate_idx].val;
+		*val2 = stk8312_samp_freq_table[data->sample_rate_idx].val2;
+		return IIO_VAL_INT_PLUS_MICRO;
+	}
+
+	return -EINVAL;
+}
+
+static int stk8312_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	int i;
+	int index = -1;
+	int ret;
+	struct stk8312_data *data = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		for (i = 0; i < ARRAY_SIZE(stk8312_scale_table); i++)
+			if (val == stk8312_scale_table[i][0] &&
+			    val2 == stk8312_scale_table[i][1]) {
+				index = i + 1;
+				break;
+			}
+		if (index < 0)
+			return -EINVAL;
+
+		mutex_lock(&data->lock);
+		ret = stk8312_set_range(data, index);
+		mutex_unlock(&data->lock);
+
+		return ret;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		for (i = 0; i < ARRAY_SIZE(stk8312_samp_freq_table); i++)
+			if (val == stk8312_samp_freq_table[i].val &&
+			    val2 == stk8312_samp_freq_table[i].val2) {
+				index = i;
+				break;
+			}
+		if (index < 0)
+			return -EINVAL;
+		mutex_lock(&data->lock);
+		ret = stk8312_set_sample_rate(data, index);
+		mutex_unlock(&data->lock);
+
+		return ret;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info stk8312_info = {
+	.read_raw		= stk8312_read_raw,
+	.write_raw		= stk8312_write_raw,
+	.attrs			= &stk8312_attribute_group,
+};
+
+static irqreturn_t stk8312_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct stk8312_data *data = iio_priv(indio_dev);
+	int bit, ret, i = 0;
+
+	mutex_lock(&data->lock);
+	/*
+	 * Do a bulk read if all channels are requested,
+	 * from 0x00 (XOUT) to 0x02 (ZOUT)
+	 */
+	if (*(indio_dev->active_scan_mask) == STK8312_ALL_CHANNEL_MASK) {
+		ret = i2c_smbus_read_i2c_block_data(data->client,
+						    STK8312_REG_XOUT,
+						    STK8312_ALL_CHANNEL_SIZE,
+						    data->scan.chans);
+		if (ret < STK8312_ALL_CHANNEL_SIZE) {
+			dev_err(&data->client->dev, "register read failed\n");
+			mutex_unlock(&data->lock);
+			goto err;
+		}
+	} else {
+		for_each_set_bit(bit, indio_dev->active_scan_mask,
+				 indio_dev->masklength) {
+			ret = stk8312_read_accel(data, bit);
+			if (ret < 0) {
+				mutex_unlock(&data->lock);
+				goto err;
+			}
+			data->scan.chans[i++] = ret;
+		}
+	}
+	mutex_unlock(&data->lock);
+
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+					   pf->timestamp);
+err:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t stk8312_data_rdy_trig_poll(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct stk8312_data *data = iio_priv(indio_dev);
+
+	if (data->dready_trigger_on)
+		iio_trigger_poll(data->dready_trig);
+
+	return IRQ_HANDLED;
+}
+
+static int stk8312_buffer_preenable(struct iio_dev *indio_dev)
+{
+	struct stk8312_data *data = iio_priv(indio_dev);
+
+	return stk8312_set_mode(data, data->mode | STK8312_MODE_ACTIVE);
+}
+
+static int stk8312_buffer_postdisable(struct iio_dev *indio_dev)
+{
+	struct stk8312_data *data = iio_priv(indio_dev);
+
+	return stk8312_set_mode(data, data->mode & (~STK8312_MODE_ACTIVE));
+}
+
+static const struct iio_buffer_setup_ops stk8312_buffer_setup_ops = {
+	.preenable   = stk8312_buffer_preenable,
+	.postdisable = stk8312_buffer_postdisable,
+};
+
+static int stk8312_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct stk8312_data *data;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev) {
+		dev_err(&client->dev, "iio allocation failed!\n");
+		return -ENOMEM;
+	}
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	i2c_set_clientdata(client, indio_dev);
+	mutex_init(&data->lock);
+
+	indio_dev->info = &stk8312_info;
+	indio_dev->name = STK8312_DRIVER_NAME;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = stk8312_channels;
+	indio_dev->num_channels = ARRAY_SIZE(stk8312_channels);
+
+	/* A software reset is recommended at power-on */
+	ret = i2c_smbus_write_byte_data(data->client, STK8312_REG_RESET, 0x00);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to reset sensor\n");
+		return ret;
+	}
+	data->sample_rate_idx = STK8312_SR_400HZ_IDX;
+	ret = stk8312_set_range(data, STK8312_RNG_6G);
+	if (ret < 0)
+		return ret;
+
+	ret = stk8312_set_mode(data,
+			       STK8312_MODE_INT_AH_PP | STK8312_MODE_ACTIVE);
+	if (ret < 0)
+		return ret;
+
+	if (client->irq > 0) {
+		ret = devm_request_threaded_irq(&client->dev, client->irq,
+						stk8312_data_rdy_trig_poll,
+						NULL,
+						IRQF_TRIGGER_RISING |
+						IRQF_ONESHOT,
+						STK8312_IRQ_NAME,
+						indio_dev);
+		if (ret < 0) {
+			dev_err(&client->dev, "request irq %d failed\n",
+				client->irq);
+			goto err_power_off;
+		}
+
+		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
+							   "%s-dev%d",
+							   indio_dev->name,
+							   indio_dev->id);
+		if (!data->dready_trig) {
+			ret = -ENOMEM;
+			goto err_power_off;
+		}
+
+		data->dready_trig->dev.parent = &client->dev;
+		data->dready_trig->ops = &stk8312_trigger_ops;
+		iio_trigger_set_drvdata(data->dready_trig, indio_dev);
+		ret = iio_trigger_register(data->dready_trig);
+		if (ret) {
+			dev_err(&client->dev, "iio trigger register failed\n");
+			goto err_power_off;
+		}
+	}
+
+	ret = iio_triggered_buffer_setup(indio_dev,
+					 iio_pollfunc_store_time,
+					 stk8312_trigger_handler,
+					 &stk8312_buffer_setup_ops);
+	if (ret < 0) {
+		dev_err(&client->dev, "iio triggered buffer setup failed\n");
+		goto err_trigger_unregister;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "device_register failed\n");
+		goto err_buffer_cleanup;
+	}
+
+	return 0;
+
+err_buffer_cleanup:
+	iio_triggered_buffer_cleanup(indio_dev);
+err_trigger_unregister:
+	if (data->dready_trig)
+		iio_trigger_unregister(data->dready_trig);
+err_power_off:
+	stk8312_set_mode(data, STK8312_MODE_STANDBY);
+	return ret;
+}
+
+static int stk8312_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct stk8312_data *data = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+	iio_triggered_buffer_cleanup(indio_dev);
+
+	if (data->dready_trig)
+		iio_trigger_unregister(data->dready_trig);
+
+	return stk8312_set_mode(data, STK8312_MODE_STANDBY);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int stk8312_suspend(struct device *dev)
+{
+	struct stk8312_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return stk8312_set_mode(data, data->mode & (~STK8312_MODE_ACTIVE));
+}
+
+static int stk8312_resume(struct device *dev)
+{
+	struct stk8312_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return stk8312_set_mode(data, data->mode | STK8312_MODE_ACTIVE);
+}
+
+static SIMPLE_DEV_PM_OPS(stk8312_pm_ops, stk8312_suspend, stk8312_resume);
+
+#define STK8312_PM_OPS (&stk8312_pm_ops)
+#else
+#define STK8312_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id stk8312_i2c_id[] = {
+	{"STK8312", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, stk8312_i2c_id);
+
+static const struct acpi_device_id stk8312_acpi_id[] = {
+	{"STK8312", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(acpi, stk8312_acpi_id);
+
+static struct i2c_driver stk8312_driver = {
+	.driver = {
+		.name = STK8312_DRIVER_NAME,
+		.pm = STK8312_PM_OPS,
+		.acpi_match_table = ACPI_PTR(stk8312_acpi_id),
+	},
+	.probe =            stk8312_probe,
+	.remove =           stk8312_remove,
+	.id_table =         stk8312_i2c_id,
+};
+
+module_i2c_driver(stk8312_driver);
+
+MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>");
+MODULE_DESCRIPTION("STK8312 3-Axis Accelerometer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/stk8ba50.c b/drivers/iio/accel/stk8ba50.c
new file mode 100644
index 000000000..e8087d7ee
--- /dev/null
+++ b/drivers/iio/accel/stk8ba50.c
@@ -0,0 +1,561 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**
+ * Sensortek STK8BA50 3-Axis Accelerometer
+ *
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * STK8BA50 7-bit I2C address: 0x18.
+ */
+
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+
+#define STK8BA50_REG_XOUT			0x02
+#define STK8BA50_REG_YOUT			0x04
+#define STK8BA50_REG_ZOUT			0x06
+#define STK8BA50_REG_RANGE			0x0F
+#define STK8BA50_REG_BWSEL			0x10
+#define STK8BA50_REG_POWMODE			0x11
+#define STK8BA50_REG_SWRST			0x14
+#define STK8BA50_REG_INTEN2			0x17
+#define STK8BA50_REG_INTMAP2			0x1A
+
+#define STK8BA50_MODE_NORMAL			0
+#define STK8BA50_MODE_SUSPEND			1
+#define STK8BA50_MODE_POWERBIT			BIT(7)
+#define STK8BA50_DATA_SHIFT			6
+#define STK8BA50_RESET_CMD			0xB6
+#define STK8BA50_SR_1792HZ_IDX			7
+#define STK8BA50_DREADY_INT_MASK		0x10
+#define STK8BA50_DREADY_INT_MAP			0x81
+#define STK8BA50_ALL_CHANNEL_MASK		7
+#define STK8BA50_ALL_CHANNEL_SIZE		6
+
+#define STK8BA50_DRIVER_NAME			"stk8ba50"
+#define STK8BA50_IRQ_NAME			"stk8ba50_event"
+
+#define STK8BA50_SCALE_AVAIL			"0.0384 0.0767 0.1534 0.3069"
+
+/*
+ * The accelerometer has four measurement ranges:
+ * +/-2g; +/-4g; +/-8g; +/-16g
+ *
+ * Acceleration values are 10-bit, 2's complement.
+ * Scales are calculated as following:
+ *
+ * scale1 = (2 + 2) * 9.81 / (2^10 - 1)   = 0.0384
+ * scale2 = (4 + 4) * 9.81 / (2^10 - 1)   = 0.0767
+ * etc.
+ *
+ * Scales are stored in this format:
+ * { <register value>, <scale value> }
+ *
+ * Locally, the range is stored as a table index.
+ */
+static const struct {
+	u8 reg_val;
+	u32 scale_val;
+} stk8ba50_scale_table[] = {
+	{3, 38400}, {5, 76700}, {8, 153400}, {12, 306900}
+};
+
+/* Sample rates are stored as { <register value>, <Hz value> } */
+static const struct {
+	u8 reg_val;
+	u16 samp_freq;
+} stk8ba50_samp_freq_table[] = {
+	{0x08, 14},  {0x09, 25},  {0x0A, 56},  {0x0B, 112},
+	{0x0C, 224}, {0x0D, 448}, {0x0E, 896}, {0x0F, 1792}
+};
+
+/* Used to map scan mask bits to their corresponding channel register. */
+static const int stk8ba50_channel_table[] = {
+	STK8BA50_REG_XOUT,
+	STK8BA50_REG_YOUT,
+	STK8BA50_REG_ZOUT
+};
+
+struct stk8ba50_data {
+	struct i2c_client *client;
+	struct mutex lock;
+	int range;
+	u8 sample_rate_idx;
+	struct iio_trigger *dready_trig;
+	bool dready_trigger_on;
+	/* Ensure timestamp is naturally aligned */
+	struct {
+		s16 chans[3];
+		s64 timetamp __aligned(8);
+	} scan;
+};
+
+#define STK8BA50_ACCEL_CHANNEL(index, reg, axis) {			\
+	.type = IIO_ACCEL,						\
+	.address = reg,							\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),		\
+				    BIT(IIO_CHAN_INFO_SAMP_FREQ),	\
+	.scan_index = index,						\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 10,						\
+		.storagebits = 16,					\
+		.shift = STK8BA50_DATA_SHIFT,				\
+		.endianness = IIO_CPU,					\
+	},								\
+}
+
+static const struct iio_chan_spec stk8ba50_channels[] = {
+	STK8BA50_ACCEL_CHANNEL(0, STK8BA50_REG_XOUT, X),
+	STK8BA50_ACCEL_CHANNEL(1, STK8BA50_REG_YOUT, Y),
+	STK8BA50_ACCEL_CHANNEL(2, STK8BA50_REG_ZOUT, Z),
+	IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static IIO_CONST_ATTR(in_accel_scale_available, STK8BA50_SCALE_AVAIL);
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("14 25 56 112 224 448 896 1792");
+
+static struct attribute *stk8ba50_attributes[] = {
+	&iio_const_attr_in_accel_scale_available.dev_attr.attr,
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group stk8ba50_attribute_group = {
+	.attrs = stk8ba50_attributes
+};
+
+static int stk8ba50_read_accel(struct stk8ba50_data *data, u8 reg)
+{
+	int ret;
+	struct i2c_client *client = data->client;
+
+	ret = i2c_smbus_read_word_data(client, reg);
+	if (ret < 0) {
+		dev_err(&client->dev, "register read failed\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+static int stk8ba50_data_rdy_trigger_set_state(struct iio_trigger *trig,
+					       bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+	int ret;
+
+	if (state)
+		ret = i2c_smbus_write_byte_data(data->client,
+			STK8BA50_REG_INTEN2, STK8BA50_DREADY_INT_MASK);
+	else
+		ret = i2c_smbus_write_byte_data(data->client,
+			STK8BA50_REG_INTEN2, 0x00);
+
+	if (ret < 0)
+		dev_err(&data->client->dev, "failed to set trigger state\n");
+	else
+		data->dready_trigger_on = state;
+
+	return ret;
+}
+
+static const struct iio_trigger_ops stk8ba50_trigger_ops = {
+	.set_trigger_state = stk8ba50_data_rdy_trigger_set_state,
+};
+
+static int stk8ba50_set_power(struct stk8ba50_data *data, bool mode)
+{
+	int ret;
+	u8 masked_reg;
+	struct i2c_client *client = data->client;
+
+	ret = i2c_smbus_read_byte_data(client, STK8BA50_REG_POWMODE);
+	if (ret < 0)
+		goto exit_err;
+
+	if (mode)
+		masked_reg = ret | STK8BA50_MODE_POWERBIT;
+	else
+		masked_reg = ret & (~STK8BA50_MODE_POWERBIT);
+
+	ret = i2c_smbus_write_byte_data(client, STK8BA50_REG_POWMODE,
+					masked_reg);
+	if (ret < 0)
+		goto exit_err;
+
+	return ret;
+
+exit_err:
+	dev_err(&client->dev, "failed to change sensor mode\n");
+	return ret;
+}
+
+static int stk8ba50_read_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int *val, int *val2, long mask)
+{
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (iio_buffer_enabled(indio_dev))
+			return -EBUSY;
+		mutex_lock(&data->lock);
+		ret = stk8ba50_set_power(data, STK8BA50_MODE_NORMAL);
+		if (ret < 0) {
+			mutex_unlock(&data->lock);
+			return -EINVAL;
+		}
+		ret = stk8ba50_read_accel(data, chan->address);
+		if (ret < 0) {
+			stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+			mutex_unlock(&data->lock);
+			return -EINVAL;
+		}
+		*val = sign_extend32(ret >> STK8BA50_DATA_SHIFT, 9);
+		stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+		mutex_unlock(&data->lock);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = stk8ba50_scale_table[data->range].scale_val;
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		*val = stk8ba50_samp_freq_table
+				[data->sample_rate_idx].samp_freq;
+		*val2 = 0;
+		return IIO_VAL_INT;
+	}
+
+	return -EINVAL;
+}
+
+static int stk8ba50_write_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,
+			      int val, int val2, long mask)
+{
+	int ret;
+	int i;
+	int index = -1;
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		if (val != 0)
+			return -EINVAL;
+
+		for (i = 0; i < ARRAY_SIZE(stk8ba50_scale_table); i++)
+			if (val2 == stk8ba50_scale_table[i].scale_val) {
+				index = i;
+				break;
+			}
+		if (index < 0)
+			return -EINVAL;
+
+		ret = i2c_smbus_write_byte_data(data->client,
+				STK8BA50_REG_RANGE,
+				stk8ba50_scale_table[index].reg_val);
+		if (ret < 0)
+			dev_err(&data->client->dev,
+					"failed to set measurement range\n");
+		else
+			data->range = index;
+
+		return ret;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		for (i = 0; i < ARRAY_SIZE(stk8ba50_samp_freq_table); i++)
+			if (val == stk8ba50_samp_freq_table[i].samp_freq) {
+				index = i;
+				break;
+			}
+		if (index < 0)
+			return -EINVAL;
+
+		ret = i2c_smbus_write_byte_data(data->client,
+				STK8BA50_REG_BWSEL,
+				stk8ba50_samp_freq_table[index].reg_val);
+		if (ret < 0)
+			dev_err(&data->client->dev,
+					"failed to set sampling rate\n");
+		else
+			data->sample_rate_idx = index;
+
+		return ret;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info stk8ba50_info = {
+	.read_raw		= stk8ba50_read_raw,
+	.write_raw		= stk8ba50_write_raw,
+	.attrs			= &stk8ba50_attribute_group,
+};
+
+static irqreturn_t stk8ba50_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+	int bit, ret, i = 0;
+
+	mutex_lock(&data->lock);
+	/*
+	 * Do a bulk read if all channels are requested,
+	 * from 0x02 (XOUT1) to 0x07 (ZOUT2)
+	 */
+	if (*(indio_dev->active_scan_mask) == STK8BA50_ALL_CHANNEL_MASK) {
+		ret = i2c_smbus_read_i2c_block_data(data->client,
+						    STK8BA50_REG_XOUT,
+						    STK8BA50_ALL_CHANNEL_SIZE,
+						    (u8 *)data->scan.chans);
+		if (ret < STK8BA50_ALL_CHANNEL_SIZE) {
+			dev_err(&data->client->dev, "register read failed\n");
+			goto err;
+		}
+	} else {
+		for_each_set_bit(bit, indio_dev->active_scan_mask,
+				 indio_dev->masklength) {
+			ret = stk8ba50_read_accel(data,
+						  stk8ba50_channel_table[bit]);
+			if (ret < 0)
+				goto err;
+
+			data->scan.chans[i++] = ret;
+		}
+	}
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+					   pf->timestamp);
+err:
+	mutex_unlock(&data->lock);
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t stk8ba50_data_rdy_trig_poll(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+
+	if (data->dready_trigger_on)
+		iio_trigger_poll(data->dready_trig);
+
+	return IRQ_HANDLED;
+}
+
+static int stk8ba50_buffer_preenable(struct iio_dev *indio_dev)
+{
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+
+	return stk8ba50_set_power(data, STK8BA50_MODE_NORMAL);
+}
+
+static int stk8ba50_buffer_postdisable(struct iio_dev *indio_dev)
+{
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+
+	return stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+}
+
+static const struct iio_buffer_setup_ops stk8ba50_buffer_setup_ops = {
+	.preenable   = stk8ba50_buffer_preenable,
+	.postdisable = stk8ba50_buffer_postdisable,
+};
+
+static int stk8ba50_probe(struct i2c_client *client,
+			  const struct i2c_device_id *id)
+{
+	int ret;
+	struct iio_dev *indio_dev;
+	struct stk8ba50_data *data;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev) {
+		dev_err(&client->dev, "iio allocation failed!\n");
+		return -ENOMEM;
+	}
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	i2c_set_clientdata(client, indio_dev);
+	mutex_init(&data->lock);
+
+	indio_dev->info = &stk8ba50_info;
+	indio_dev->name = STK8BA50_DRIVER_NAME;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = stk8ba50_channels;
+	indio_dev->num_channels = ARRAY_SIZE(stk8ba50_channels);
+
+	/* Reset all registers on startup */
+	ret = i2c_smbus_write_byte_data(client,
+			STK8BA50_REG_SWRST, STK8BA50_RESET_CMD);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to reset sensor\n");
+		goto err_power_off;
+	}
+
+	/* The default range is +/-2g */
+	data->range = 0;
+
+	/* The default sampling rate is 1792 Hz (maximum) */
+	data->sample_rate_idx = STK8BA50_SR_1792HZ_IDX;
+
+	/* Set up interrupts */
+	ret = i2c_smbus_write_byte_data(client,
+			STK8BA50_REG_INTEN2, STK8BA50_DREADY_INT_MASK);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to set up interrupts\n");
+		goto err_power_off;
+	}
+	ret = i2c_smbus_write_byte_data(client,
+			STK8BA50_REG_INTMAP2, STK8BA50_DREADY_INT_MAP);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to set up interrupts\n");
+		goto err_power_off;
+	}
+
+	if (client->irq > 0) {
+		ret = devm_request_threaded_irq(&client->dev, client->irq,
+						stk8ba50_data_rdy_trig_poll,
+						NULL,
+						IRQF_TRIGGER_RISING |
+						IRQF_ONESHOT,
+						STK8BA50_IRQ_NAME,
+						indio_dev);
+		if (ret < 0) {
+			dev_err(&client->dev, "request irq %d failed\n",
+				client->irq);
+			goto err_power_off;
+		}
+
+		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
+							   "%s-dev%d",
+							   indio_dev->name,
+							   indio_dev->id);
+		if (!data->dready_trig) {
+			ret = -ENOMEM;
+			goto err_power_off;
+		}
+
+		data->dready_trig->dev.parent = &client->dev;
+		data->dready_trig->ops = &stk8ba50_trigger_ops;
+		iio_trigger_set_drvdata(data->dready_trig, indio_dev);
+		ret = iio_trigger_register(data->dready_trig);
+		if (ret) {
+			dev_err(&client->dev, "iio trigger register failed\n");
+			goto err_power_off;
+		}
+	}
+
+	ret = iio_triggered_buffer_setup(indio_dev,
+					 iio_pollfunc_store_time,
+					 stk8ba50_trigger_handler,
+					 &stk8ba50_buffer_setup_ops);
+	if (ret < 0) {
+		dev_err(&client->dev, "iio triggered buffer setup failed\n");
+		goto err_trigger_unregister;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "device_register failed\n");
+		goto err_buffer_cleanup;
+	}
+
+	return ret;
+
+err_buffer_cleanup:
+	iio_triggered_buffer_cleanup(indio_dev);
+err_trigger_unregister:
+	if (data->dready_trig)
+		iio_trigger_unregister(data->dready_trig);
+err_power_off:
+	stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+	return ret;
+}
+
+static int stk8ba50_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct stk8ba50_data *data = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+	iio_triggered_buffer_cleanup(indio_dev);
+
+	if (data->dready_trig)
+		iio_trigger_unregister(data->dready_trig);
+
+	return stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int stk8ba50_suspend(struct device *dev)
+{
+	struct stk8ba50_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return stk8ba50_set_power(data, STK8BA50_MODE_SUSPEND);
+}
+
+static int stk8ba50_resume(struct device *dev)
+{
+	struct stk8ba50_data *data;
+
+	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return stk8ba50_set_power(data, STK8BA50_MODE_NORMAL);
+}
+
+static SIMPLE_DEV_PM_OPS(stk8ba50_pm_ops, stk8ba50_suspend, stk8ba50_resume);
+
+#define STK8BA50_PM_OPS (&stk8ba50_pm_ops)
+#else
+#define STK8BA50_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id stk8ba50_i2c_id[] = {
+	{"stk8ba50", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, stk8ba50_i2c_id);
+
+static const struct acpi_device_id stk8ba50_acpi_id[] = {
+	{"STK8BA50", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(acpi, stk8ba50_acpi_id);
+
+static struct i2c_driver stk8ba50_driver = {
+	.driver = {
+		.name = "stk8ba50",
+		.pm = STK8BA50_PM_OPS,
+		.acpi_match_table = ACPI_PTR(stk8ba50_acpi_id),
+	},
+	.probe =            stk8ba50_probe,
+	.remove =           stk8ba50_remove,
+	.id_table =         stk8ba50_i2c_id,
+};
+
+module_i2c_driver(stk8ba50_driver);
+
+MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>");
+MODULE_DESCRIPTION("STK8BA50 3-Axis Accelerometer driver");
+MODULE_LICENSE("GPL v2");