iio: imu: st_lsm6dsx: add support to lsm6ds3h

Add support to STM LSM6DS3H 6-axis (acc + gyro) Mems sensor

http://www.st.com/resource/en/datasheet/lsm6ds3h.pdf
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/imu/st_lsm6dsx/Kconfig

@@ -8,7 +8,7 @@ config IIO_ST_LSM6DSX
 	select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
 	help
 	  Say yes here to build support for STMicroelectronics LSM6DSx imu
-	  sensor. Supported devices: lsm6ds3, lsm6dsl, lsm6dsm
+	  sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm
 
 	  To compile this driver as a module, choose M here: the module
 	  will be called st_lsm6dsx.

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h

@@ -15,11 +15,13 @@
 #include <linux/device.h>
 
 #define ST_LSM6DS3_DEV_NAME	"lsm6ds3"
+#define ST_LSM6DS3H_DEV_NAME	"lsm6ds3h"
 #define ST_LSM6DSL_DEV_NAME	"lsm6dsl"
 #define ST_LSM6DSM_DEV_NAME	"lsm6dsm"
 
 enum st_lsm6dsx_hw_id {
 	ST_LSM6DS3_ID,
+	ST_LSM6DS3H_ID,
 	ST_LSM6DSL_ID,
 	ST_LSM6DSM_ID,
 	ST_LSM6DSX_MAX_ID,

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c

@@ -1,9 +1,10 @@
 /*
  * STMicroelectronics st_lsm6dsx FIFO buffer library driver
  *
- * LSM6DS3/LSM6DSL/LSM6DSM: The FIFO buffer can be configured to store data
+ * LSM6DS3/LSM6DS3H/LSM6DSL/LSM6DSM: The FIFO buffer can be configured
- * from gyroscope and accelerometer. Samples are queued without any tag
+ * to store data from gyroscope and accelerometer. Samples are queued
- * according to a specific pattern based on 'FIFO data sets' (6 bytes each):
+ * without any tag according to a specific pattern based on 'FIFO data sets'
+ * (6 bytes each):
  *  - 1st data set is reserved for gyroscope data
  *  - 2nd data set is reserved for accelerometer data
  * The FIFO pattern changes depending on the ODRs and decimation factors
@@ -206,7 +207,7 @@ int st_lsm6dsx_update_watermark(struct st_lsm6dsx_sensor *sensor, u16 watermark)
 }
 
 /**
- * st_lsm6dsx_read_fifo() - LSM6DS3-LSM6DSL-LSM6DSM read FIFO routine
+ * st_lsm6dsx_read_fifo() - LSM6DS3-LSM6DS3H-LSM6DSL-LSM6DSM read FIFO routine
  * @hw: Pointer to instance of struct st_lsm6dsx_hw.
  *
  * Read samples from the hw FIFO and push them to IIO buffers.

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c

@@ -17,7 +17,7 @@
  *   - Gyroscope supported full-scale [dps]: +-125/+-245/+-500/+-1000/+-2000
  *   - FIFO size: 8KB
  *
- * - LSM6DSL/LSM6DSM:
+ * - LSM6DS3H/LSM6DSL/LSM6DSM:
  *   - Accelerometer/Gyroscope supported ODR [Hz]: 13, 26, 52, 104, 208, 416
  *   - Accelerometer supported full-scale [g]: +-2/+-4/+-8/+-16
  *   - Gyroscope supported full-scale [dps]: +-125/+-245/+-500/+-1000/+-2000
@@ -164,6 +164,13 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 			[0] = ST_LSM6DS3_ID,
 		},
 	},
+	{
+		.wai = 0x69,
+		.max_fifo_size = 4096,
+		.id = {
+			[0] = ST_LSM6DS3H_ID,
+		},
+	},
 	{
 		.wai = 0x6a,
 		.max_fifo_size = 4096,

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i2c.c

@@ -70,6 +70,10 @@ static const struct of_device_id st_lsm6dsx_i2c_of_match[] = {
 		.compatible = "st,lsm6ds3",
 		.data = (void *)ST_LSM6DS3_ID,
 	},
+	{
+		.compatible = "st,lsm6ds3h",
+		.data = (void *)ST_LSM6DS3H_ID,
+	},
 	{
 		.compatible = "st,lsm6dsl",
 		.data = (void *)ST_LSM6DSL_ID,
@@ -84,6 +88,7 @@ MODULE_DEVICE_TABLE(of, st_lsm6dsx_i2c_of_match);
 
 static const struct i2c_device_id st_lsm6dsx_i2c_id_table[] = {
 	{ ST_LSM6DS3_DEV_NAME, ST_LSM6DS3_ID },
+	{ ST_LSM6DS3H_DEV_NAME, ST_LSM6DS3H_ID },
 	{ ST_LSM6DSL_DEV_NAME, ST_LSM6DSL_ID },
 	{ ST_LSM6DSM_DEV_NAME, ST_LSM6DSM_ID },
 	{},

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_spi.c

@@ -87,6 +87,10 @@ static const struct of_device_id st_lsm6dsx_spi_of_match[] = {
 		.compatible = "st,lsm6ds3",
 		.data = (void *)ST_LSM6DS3_ID,
 	},
+	{
+		.compatible = "st,lsm6ds3h",
+		.data = (void *)ST_LSM6DS3H_ID,
+	},
 	{
 		.compatible = "st,lsm6dsl",
 		.data = (void *)ST_LSM6DSL_ID,
@@ -101,6 +105,7 @@ MODULE_DEVICE_TABLE(of, st_lsm6dsx_spi_of_match);
 
 static const struct spi_device_id st_lsm6dsx_spi_id_table[] = {
 	{ ST_LSM6DS3_DEV_NAME, ST_LSM6DS3_ID },
+	{ ST_LSM6DS3H_DEV_NAME, ST_LSM6DS3H_ID },
 	{ ST_LSM6DSL_DEV_NAME, ST_LSM6DSL_ID },
 	{ ST_LSM6DSM_DEV_NAME, ST_LSM6DSM_ID },
 	{},