iio: imu: st_lsm6dsx: add support to LSM6DSTX

Add support to STM LSM6DSTX (acc + gyro) Mems sensor.
The LSM6DSTX sensor can use LSM6DST as fallback device since it
implements all the LSM6DSTX features currently implemented in
st_lsm6dsx.

Datasheet: https://www.st.com/resource/en/datasheet/lsm6dstx.pdfSigned-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/573a232b0f320b2ec92c56fa24393cfb275183fb.1663262890.git.lorenzo@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/st_lsm6dsx/Kconfig

@@ -12,7 +12,7 @@ config IIO_ST_LSM6DSX
 	  Say yes here to build support for STMicroelectronics LSM6DSx imu
 	  sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
 	  ism330dlc, lsm6dso, lsm6dsox, asm330lhh, asm330lhhx, lsm6dsr,
-	  lsm6ds3tr-c, ism330dhcx, lsm6dsrx, lsm6ds0, lsm6dsop,
+	  lsm6ds3tr-c, ism330dhcx, lsm6dsrx, lsm6ds0, lsm6dsop, lsm6dstx,
 	  the accelerometer/gyroscope of lsm9ds1 and lsm6dst.
 
 	  To compile this driver as a module, choose M here: the module

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h

@@ -32,6 +32,7 @@
 #define ST_LSM6DST_DEV_NAME	"lsm6dst"
 #define ST_LSM6DSOP_DEV_NAME	"lsm6dsop"
 #define ST_ASM330LHHX_DEV_NAME	"asm330lhhx"
+#define ST_LSM6DSTX_DEV_NAME	"lsm6dstx"
 
 enum st_lsm6dsx_hw_id {
 	ST_LSM6DS3_ID,
@@ -51,6 +52,7 @@ enum st_lsm6dsx_hw_id {
 	ST_LSM6DST_ID,
 	ST_LSM6DSOP_ID,
 	ST_ASM330LHHX_ID,
+	ST_LSM6DSTX_ID,
 	ST_LSM6DSX_MAX_ID,
 };
 

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c

@@ -15,7 +15,7 @@
  * value of the decimation factor and ODR set for each FIFO data set.
  *
  * LSM6DSO/LSM6DSOX/ASM330LHH/ASM330LHHX/LSM6DSR/LSM6DSRX/ISM330DHCX/
- * LSM6DST/LSM6DSOP:
+ * LSM6DST/LSM6DSOP/LSM6DSTX:
  * The FIFO buffer can be configured to store data from gyroscope and
  * accelerometer. Each sample is queued with a tag (1B) indicating data
  * source (gyroscope, accelerometer, hw timer).

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c

@@ -26,7 +26,8 @@
  *   - Gyroscope supported full-scale [dps]: +-125/+-245/+-500/+-1000/+-2000
  *   - FIFO size: 4KB
  *
- * - LSM6DSO/LSM6DSOX/ASM330LHH/ASM330LHHX/LSM6DSR/ISM330DHCX/LSM6DST/LSM6DSOP:
+ * - LSM6DSO/LSM6DSOX/ASM330LHH/ASM330LHHX/LSM6DSR/ISM330DHCX/LSM6DST/LSM6DSOP/
+ *   LSM6DSTX:
  *   - Accelerometer/Gyroscope supported ODR [Hz]: 12.5, 26, 52, 104, 208, 416,
  *     833
  *   - Accelerometer supported full-scale [g]: +-2/+-4/+-8/+-16
@@ -791,6 +792,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.hw_id = ST_ASM330LHHX_ID,
 				.name = ST_ASM330LHHX_DEV_NAME,
 				.wai = 0x6b,
+			}, {
+				.hw_id = ST_LSM6DSTX_ID,
+				.name = ST_LSM6DSTX_DEV_NAME,
+				.wai = 0x6d,
 			},
 		},
 		.channels = {

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i2c.c

@@ -105,6 +105,10 @@ static const struct of_device_id st_lsm6dsx_i2c_of_match[] = {
 		.compatible = "st,asm330lhhx",
 		.data = (void *)ST_ASM330LHHX_ID,
 	},
+	{
+		.compatible = "st,lsm6dstx",
+		.data = (void *)ST_LSM6DSTX_ID,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, st_lsm6dsx_i2c_of_match);
@@ -127,6 +131,7 @@ static const struct i2c_device_id st_lsm6dsx_i2c_id_table[] = {
 	{ ST_LSM6DST_DEV_NAME, ST_LSM6DST_ID },
 	{ ST_LSM6DSOP_DEV_NAME, ST_LSM6DSOP_ID },
 	{ ST_ASM330LHHX_DEV_NAME, ST_ASM330LHHX_ID },
+	{ ST_LSM6DSTX_DEV_NAME, ST_LSM6DSTX_ID },
 	{},
 };
 MODULE_DEVICE_TABLE(i2c, st_lsm6dsx_i2c_id_table);

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_spi.c

@@ -105,6 +105,10 @@ static const struct of_device_id st_lsm6dsx_spi_of_match[] = {
 		.compatible = "st,asm330lhhx",
 		.data = (void *)ST_ASM330LHHX_ID,
 	},
+	{
+		.compatible = "st,lsm6dstx",
+		.data = (void *)ST_LSM6DSTX_ID,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, st_lsm6dsx_spi_of_match);
@@ -127,6 +131,7 @@ static const struct spi_device_id st_lsm6dsx_spi_id_table[] = {
 	{ ST_LSM6DST_DEV_NAME, ST_LSM6DST_ID },
 	{ ST_LSM6DSOP_DEV_NAME, ST_LSM6DSOP_ID },
 	{ ST_ASM330LHHX_DEV_NAME, ST_ASM330LHHX_ID },
+	{ ST_LSM6DSTX_DEV_NAME, ST_LSM6DSTX_ID },
 	{},
 };
 MODULE_DEVICE_TABLE(spi, st_lsm6dsx_spi_id_table);