iio: st-accel: add support for lis3de

This commit add support for STMicroelectronics lis3de accelerometer.
Datasheet for this device can be found here:

https://www.st.com/resource/en/datasheet/lis3de.pdf

Signed-off-by: Heiko Stuebner <heiko.stuebner@bq.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/st-sensors.txt

@@ -48,6 +48,7 @@ Accelerometers:
 - st,lis3l02dq
 - st,lis2dw12
 - st,lis3dhh
+- st,lis3de
 
 Gyroscopes:
 - st,l3g4200d-gyro

drivers/iio/accel/Kconfig

@@ -223,7 +223,7 @@ config IIO_ST_ACCEL_3AXIS
 	  Say yes here to build support for STMicroelectronics accelerometers:
 	  LSM303DLH, LSM303DLHC, LIS3DH, LSM330D, LSM330DL, LSM330DLC,
 	  LIS331DLH, LSM303DL, LSM303DLM, LSM330, LIS2DH12, H3LIS331DL,
-	  LNG2DM
+	  LNG2DM, LIS3DE
 
 	  This driver can also be built as a module. If so, these modules
 	  will be created:

drivers/iio/accel/st_accel.h

@@ -56,6 +56,7 @@ enum st_accel_type {
 #define LNG2DM_ACCEL_DEV_NAME		"lng2dm"
 #define LIS2DW12_ACCEL_DEV_NAME		"lis2dw12"
 #define LIS3DHH_ACCEL_DEV_NAME		"lis3dhh"
+#define LIS3DE_ACCEL_DEV_NAME		"lis3de"
 
 /**
 * struct st_sensors_platform_data - default accel platform data

drivers/iio/accel/st_accel_core.c

@@ -103,6 +103,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
 			[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 = {

drivers/iio/accel/st_accel_i2c.c

@@ -98,6 +98,10 @@ static const struct of_device_id st_accel_of_match[] = {
 		.compatible = "st,lis2dw12",
 		.data = LIS2DW12_ACCEL_DEV_NAME,
 	},
+	{
+		.compatible = "st,lis3de",
+		.data = LIS3DE_ACCEL_DEV_NAME,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, st_accel_of_match);
@@ -135,6 +139,7 @@ static const struct i2c_device_id st_accel_id_table[] = {
 	{ LIS331DL_ACCEL_DEV_NAME },
 	{ LIS3LV02DL_ACCEL_DEV_NAME },
 	{ LIS2DW12_ACCEL_DEV_NAME },
+	{ LIS3DE_ACCEL_DEV_NAME },
 	{},
 };
 MODULE_DEVICE_TABLE(i2c, st_accel_id_table);

drivers/iio/accel/st_accel_spi.c

@@ -90,6 +90,10 @@ static const struct of_device_id st_accel_of_match[] = {
 		.compatible = "st,lis3dhh",
 		.data = LIS3DHH_ACCEL_DEV_NAME,
 	},
+	{
+		.compatible = "st,lis3de",
+		.data = LIS3DE_ACCEL_DEV_NAME,
+	},
 	{}
 };
 MODULE_DEVICE_TABLE(of, st_accel_of_match);
@@ -143,6 +147,7 @@ static const struct spi_device_id st_accel_id_table[] = {
 	{ LIS3LV02DL_ACCEL_DEV_NAME },
 	{ LIS2DW12_ACCEL_DEV_NAME },
 	{ LIS3DHH_ACCEL_DEV_NAME },
+	{ LIS3DE_ACCEL_DEV_NAME },
 	{},
 };
 MODULE_DEVICE_TABLE(spi, st_accel_id_table);

include/linux/iio/common/st_sensors.h

@@ -40,7 +40,7 @@
 #define ST_SENSORS_DEFAULT_STAT_ADDR		0x27
 
 #define ST_SENSORS_MAX_NAME			17
-#define ST_SENSORS_MAX_4WAI			7
+#define ST_SENSORS_MAX_4WAI			8
 
 #define ST_SENSORS_LSM_CHANNELS(device_type, mask, index, mod, \
 					ch2, s, endian, rbits, sbits, addr) \