iio: accel: add support to LIS2DW12

add support to STMicroelectronics LIS2DW12 accelerometer in
st_accel framework

http://www.st.com/resource/en/datasheet/lis2dw12.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/accel/st_accel.h

@@ -32,6 +32,7 @@ enum st_accel_type {
 	H3LIS331DL,
 	LIS331DL,
 	LIS3LV02DL,
+	LIS2DW12,
 	ST_ACCEL_MAX,
 };
 
@@ -52,6 +53,7 @@ enum st_accel_type {
 #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"
 
 /**
 * struct st_sensors_platform_data - default accel platform data

drivers/iio/accel/st_accel_core.c

@@ -692,6 +692,85 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = {
 		.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,
+			},
+			.int2 = {
+				.addr = 0x24,
+				.mask = 0x01,
+			},
+			.addr_ihl = 0x22,
+			.mask_ihl = 0x08,
+			.addr_od = 0x22,
+			.mask_od = 0x20,
+			.stat_drdy = {
+				.addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+				.mask = 0x01,
+			},
+		},
+		.sim = {
+			.addr = 0x21,
+			.value = BIT(0),
+		},
+		.multi_read_bit = false,
+		.bootime = 2,
+	},
 };
 
 static int st_accel_read_raw(struct iio_dev *indio_dev,

drivers/iio/accel/st_accel_i2c.c

@@ -94,6 +94,10 @@ static const struct of_device_id st_accel_of_match[] = {
 		.compatible = "st,lng2dm-accel",
 		.data = LNG2DM_ACCEL_DEV_NAME,
 	},
+	{
+		.compatible = "st,lis2dw12",
+		.data = LIS2DW12_ACCEL_DEV_NAME,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, st_accel_of_match);
@@ -129,6 +133,7 @@ static const struct i2c_device_id st_accel_id_table[] = {
 	{ H3LIS331DL_ACCEL_DEV_NAME, H3LIS331DL },
 	{ LIS331DL_ACCEL_DEV_NAME, LIS331DL },
 	{ LIS3LV02DL_ACCEL_DEV_NAME, LIS3LV02DL },
+	{ LIS2DW12_ACCEL_DEV_NAME, LIS2DW12 },
 	{},
 };
 MODULE_DEVICE_TABLE(i2c, st_accel_id_table);

drivers/iio/accel/st_accel_spi.c

@@ -82,6 +82,10 @@ static const struct of_device_id st_accel_of_match[] = {
 		.compatible = "st,lis331dl-accel",
 		.data = LIS331DL_ACCEL_DEV_NAME,
 	},
+	{
+		.compatible = "st,lis2dw12",
+		.data = LIS2DW12_ACCEL_DEV_NAME,
+	},
 	{}
 };
 MODULE_DEVICE_TABLE(of, st_accel_of_match);
@@ -133,6 +137,7 @@ static const struct spi_device_id st_accel_id_table[] = {
 	{ H3LIS331DL_ACCEL_DEV_NAME },
 	{ LIS331DL_ACCEL_DEV_NAME },
 	{ LIS3LV02DL_ACCEL_DEV_NAME },
+	{ LIS2DW12_ACCEL_DEV_NAME },
 	{},
 };
 MODULE_DEVICE_TABLE(spi, st_accel_id_table);