IIO: st_accel_i2c.c: Simplify access to driver data

Use device_get_match_data API to simplify access to driver data.
Let acpi_device_id table entries point to the same driver data as
of_device_id table entries and uniquify access to driver data by using
device_get_match_data API. Remove unused i2c_device_id .driver_data
fields.
Signed-off-by: Nikolaus Voss <nikolaus.voss@loewensteinmedical.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/accel/st_accel_i2c.c

@@ -14,8 +14,8 @@
 #include <linux/acpi.h>
 #include <linux/i2c.h>
 #include <linux/iio/iio.h>
+#include <linux/property.h>
 
-#include <linux/iio/common/st_sensors.h>
 #include <linux/iio/common/st_sensors_i2c.h>
 #include "st_accel.h"
 
@@ -107,8 +107,8 @@ MODULE_DEVICE_TABLE(of, st_accel_of_match);
 
 #ifdef CONFIG_ACPI
 static const struct acpi_device_id st_accel_acpi_match[] = {
-	{"SMO8840", LNG2DM},
-	{"SMO8A90", LNG2DM},
+	{"SMO8840", (kernel_ulong_t)LNG2DM_ACCEL_DEV_NAME},
+	{"SMO8A90", (kernel_ulong_t)LNG2DM_ACCEL_DEV_NAME},
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, st_accel_acpi_match);
@@ -117,24 +117,24 @@ MODULE_DEVICE_TABLE(acpi, st_accel_acpi_match);
 #endif
 
 static const struct i2c_device_id st_accel_id_table[] = {
-	{ LSM303DLH_ACCEL_DEV_NAME, LSM303DLH },
-	{ LSM303DLHC_ACCEL_DEV_NAME, LSM303DLHC },
-	{ LIS3DH_ACCEL_DEV_NAME, LIS3DH },
-	{ LSM330D_ACCEL_DEV_NAME, LSM330D },
-	{ LSM330DL_ACCEL_DEV_NAME, LSM330DL },
-	{ LSM330DLC_ACCEL_DEV_NAME, LSM330DLC },
-	{ LIS331DLH_ACCEL_DEV_NAME, LIS331DLH },
-	{ LSM303DL_ACCEL_DEV_NAME, LSM303DL },
-	{ LSM303DLM_ACCEL_DEV_NAME, LSM303DLM },
-	{ LSM330_ACCEL_DEV_NAME, LSM330 },
-	{ LSM303AGR_ACCEL_DEV_NAME, LSM303AGR },
-	{ LIS2DH12_ACCEL_DEV_NAME, LIS2DH12 },
-	{ LIS3L02DQ_ACCEL_DEV_NAME, LIS3L02DQ },
-	{ LNG2DM_ACCEL_DEV_NAME, LNG2DM },
-	{ H3LIS331DL_ACCEL_DEV_NAME, H3LIS331DL },
-	{ LIS331DL_ACCEL_DEV_NAME, LIS331DL },
-	{ LIS3LV02DL_ACCEL_DEV_NAME, LIS3LV02DL },
-	{ LIS2DW12_ACCEL_DEV_NAME, LIS2DW12 },
+	{ LSM303DLH_ACCEL_DEV_NAME },
+	{ LSM303DLHC_ACCEL_DEV_NAME },
+	{ LIS3DH_ACCEL_DEV_NAME },
+	{ LSM330D_ACCEL_DEV_NAME },
+	{ LSM330DL_ACCEL_DEV_NAME },
+	{ LSM330DLC_ACCEL_DEV_NAME },
+	{ LIS331DLH_ACCEL_DEV_NAME },
+	{ LSM303DL_ACCEL_DEV_NAME },
+	{ LSM303DLM_ACCEL_DEV_NAME },
+	{ LSM330_ACCEL_DEV_NAME },
+	{ LSM303AGR_ACCEL_DEV_NAME },
+	{ LIS2DH12_ACCEL_DEV_NAME },
+	{ LIS3L02DQ_ACCEL_DEV_NAME },
+	{ LNG2DM_ACCEL_DEV_NAME },
+	{ H3LIS331DL_ACCEL_DEV_NAME },
+	{ LIS331DL_ACCEL_DEV_NAME },
+	{ LIS3LV02DL_ACCEL_DEV_NAME },
+	{ LIS2DW12_ACCEL_DEV_NAME },
 	{},
 };
 MODULE_DEVICE_TABLE(i2c, st_accel_id_table);
@@ -144,6 +144,7 @@ static int st_accel_i2c_probe(struct i2c_client *client,
 {
 	struct iio_dev *indio_dev;
 	struct st_sensor_data *adata;
+	const char *match;
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*adata));
@@ -152,19 +153,9 @@ static int st_accel_i2c_probe(struct i2c_client *client,
 
 	adata = iio_priv(indio_dev);
 
-	if (client->dev.of_node) {
-		st_sensors_of_name_probe(&client->dev, st_accel_of_match,
-					 client->name, sizeof(client->name));
-	} else if (ACPI_HANDLE(&client->dev)) {
-		ret = st_sensors_match_acpi_device(&client->dev);
-		if ((ret < 0) || (ret >= ST_ACCEL_MAX))
-			return -ENODEV;
-
-		strlcpy(client->name, st_accel_id_table[ret].name,
-				sizeof(client->name));
-	} else if (!id)
-		return -ENODEV;
-
+	match = device_get_match_data(&client->dev);
+	if (match)
+		strlcpy(client->name, match, sizeof(client->name));
 
 	st_sensors_i2c_configure(indio_dev, client, adata);