iio: accel: adxl345: Simplify adxl345_read_raw()

Simplify adxl345_read_raw() by adding uscale variable to
struct adxl345_chip_info. Also convert variables adxl3{4,7}5_uscale to
macros and use it in OF/ACPI/ID match table.

Drop enum adxl345_device_type as there is no user.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20230903090051.39274-3-biju.das.jz@bp.renesas.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/accel/adxl345.h

@@ -8,14 +8,24 @@
 #ifndef _ADXL345_H_
 #define _ADXL345_H_
 
-enum adxl345_device_type {
-	ADXL345	= 1,
-	ADXL375 = 2,
-};
+/*
+ * In full-resolution mode, scale factor is maintained at ~4 mg/LSB
+ * in all g ranges.
+ *
+ * At +/- 16g with 13-bit resolution, scale is computed as:
+ * (16 + 16) * 9.81 / (2^13 - 1) = 0.0383
+ */
+#define ADXL345_USCALE	38300
+
+/*
+ * The Datasheet lists a resolution of Resolution is ~49 mg per LSB. That's
+ * ~480mm/s**2 per LSB.
+ */
+#define ADXL375_USCALE	480000
 
 struct adxl345_chip_info {
 	const char *name;
-	unsigned int type;
+	int uscale;
 };
 
 int adxl345_core_probe(struct device *dev, struct regmap *regmap);

drivers/iio/accel/adxl345_core.c

@@ -45,21 +45,6 @@
 
 #define ADXL345_DEVID			0xE5
 
-/*
- * In full-resolution mode, scale factor is maintained at ~4 mg/LSB
- * in all g ranges.
- *
- * At +/- 16g with 13-bit resolution, scale is computed as:
- * (16 + 16) * 9.81 / (2^13 - 1) = 0.0383
- */
-static const int adxl345_uscale = 38300;
-
-/*
- * The Datasheet lists a resolution of Resolution is ~49 mg per LSB. That's
- * ~480mm/s**2 per LSB.
- */
-static const int adxl375_uscale = 480000;
-
 struct adxl345_data {
 	const struct adxl345_chip_info *info;
 	struct regmap *regmap;
@@ -110,15 +95,7 @@ static int adxl345_read_raw(struct iio_dev *indio_dev,
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
 		*val = 0;
-		switch (data->info->type) {
-		case ADXL345:
-			*val2 = adxl345_uscale;
-			break;
-		case ADXL375:
-			*val2 = adxl375_uscale;
-			break;
-		}
-
+		*val2 = data->info->uscale;
 		return IIO_VAL_INT_PLUS_MICRO;
 	case IIO_CHAN_INFO_CALIBBIAS:
 		ret = regmap_read(data->regmap,

drivers/iio/accel/adxl345_i2c.c

@@ -32,12 +32,12 @@ static int adxl345_i2c_probe(struct i2c_client *client)
 
 static const struct adxl345_chip_info adxl345_i2c_info = {
 	.name = "adxl345",
-	.type = ADXL345,
+	.uscale = ADXL345_USCALE,
 };
 
 static const struct adxl345_chip_info adxl375_i2c_info = {
 	.name = "adxl375",
-	.type = ADXL375,
+	.uscale = ADXL375_USCALE,
 };
 
 static const struct i2c_device_id adxl345_i2c_id[] = {

drivers/iio/accel/adxl345_spi.c

@@ -38,12 +38,12 @@ static int adxl345_spi_probe(struct spi_device *spi)
 
 static const struct adxl345_chip_info adxl345_spi_info = {
 	.name = "adxl345",
-	.type = ADXL345,
+	.uscale = ADXL345_USCALE,
 };
 
 static const struct adxl345_chip_info adxl375_spi_info = {
 	.name = "adxl375",
-	.type = ADXL375,
+	.uscale = ADXL375_USCALE,
 };
 
 static const struct spi_device_id adxl345_spi_id[] = {