iio: magnetometer: add support to LIS2MDL

add support to STMicroelectronics LIS2MDL magnetometer in
st_magn framework

http://www.st.com/resource/en/datasheet/lis2mdl.pdf
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/magnetometer/st_magn.h

@@ -19,6 +19,7 @@
 #define LSM303DLM_MAGN_DEV_NAME		"lsm303dlm_magn"
 #define LIS3MDL_MAGN_DEV_NAME		"lis3mdl"
 #define LSM303AGR_MAGN_DEV_NAME		"lsm303agr_magn"
+#define LIS2MDL_MAGN_DEV_NAME		"lis2mdl"
 
 int st_magn_common_probe(struct iio_dev *indio_dev);
 void st_magn_common_remove(struct iio_dev *indio_dev);

drivers/iio/magnetometer/st_magn_core.c

@@ -323,6 +323,7 @@ static const struct st_sensor_settings st_magn_sensors_settings[] = {
 		.wai_addr = 0x4f,
 		.sensors_supported = {
 			[0] = LSM303AGR_MAGN_DEV_NAME,
+			[1] = LIS2MDL_MAGN_DEV_NAME,
 		},
 		.ch = (struct iio_chan_spec *)st_magn_3_16bit_channels,
 		.odr = {

drivers/iio/magnetometer/st_magn_i2c.c

@@ -40,6 +40,10 @@ static const struct of_device_id st_magn_of_match[] = {
 		.compatible = "st,lsm303agr-magn",
 		.data = LSM303AGR_MAGN_DEV_NAME,
 	},
+	{
+		.compatible = "st,lis2mdl",
+		.data = LIS2MDL_MAGN_DEV_NAME,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, st_magn_of_match);
@@ -85,6 +89,7 @@ static const struct i2c_device_id st_magn_id_table[] = {
 	{ LSM303DLM_MAGN_DEV_NAME },
 	{ LIS3MDL_MAGN_DEV_NAME },
 	{ LSM303AGR_MAGN_DEV_NAME },
+	{ LIS2MDL_MAGN_DEV_NAME },
 	{},
 };
 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);

drivers/iio/magnetometer/st_magn_spi.c

@@ -33,6 +33,10 @@ static const struct of_device_id st_magn_of_match[] = {
 		.compatible = "st,lsm303agr-magn",
 		.data = LSM303AGR_MAGN_DEV_NAME,
 	},
+	{
+		.compatible = "st,lis2mdl",
+		.data = LIS2MDL_MAGN_DEV_NAME,
+	},
 	{}
 };
 MODULE_DEVICE_TABLE(of, st_magn_of_match);
@@ -74,6 +78,7 @@ static int st_magn_spi_remove(struct spi_device *spi)
 static const struct spi_device_id st_magn_id_table[] = {
 	{ LIS3MDL_MAGN_DEV_NAME },
 	{ LSM303AGR_MAGN_DEV_NAME },
+	{ LIS2MDL_MAGN_DEV_NAME },
 	{},
 };
 MODULE_DEVICE_TABLE(spi, st_magn_id_table);