iio: magnetometer: yas530: Add IIO scaling to "chip_info"

Add IIO scaling to the "chip_info" structure to ease the handling to
different YAS variants.

Signed-off-by: Jakob Hauser <jahau@rocketmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/a12f892633bbee13a8856c231dc793ebbc5d3a03.1660337264.git.jahau@rocketmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/magnetometer/yamaha-yas530.c b/drivers/iio/magnetometer/yamaha-yas530.c
index fa317b9..af5c090 100644 (file)
--- a/drivers/iio/magnetometer/yamaha-yas530.c
+++ b/drivers/iio/magnetometer/yamaha-yas530.c
@@ -130,6 +130,7 @@ struct yas5xx;
  * @version_names: version letters or namings
  * @volatile_reg: device-specific volatile registers
  * @volatile_reg_qty: quantity of device-specific volatile registers
+ * @scaling_val2: scaling value for IIO_CHAN_INFO_SCALE
  */
 struct yas5xx_chip_info {
        unsigned int devid;
@@ -137,6 +138,7 @@ struct yas5xx_chip_info {
        char *version_names[2];
        const int *volatile_reg;
        int volatile_reg_qty;
+       u32 scaling_val2;
 };
 
 /**
@@ -504,27 +506,8 @@ static int yas5xx_read_raw(struct iio_dev *indio_dev,
                }
                return IIO_VAL_INT;
        case IIO_CHAN_INFO_SCALE:
-               switch (ci->devid) {
-               case YAS530_DEVICE_ID:
-                       /*
-                        * Raw values of YAS530 are in picotesla. Divide by
-                        * 100000000 (10^8) to get Gauss.
-                        */
-                       *val = 1;
-                       *val2 = 100000000;
-                       break;
-               case YAS532_DEVICE_ID:
-                       /*
-                        * Raw values of YAS532 are in nanotesla. Divide by
-                        * 100000 (10^5) to get Gauss.
-                        */
-                       *val = 1;
-                       *val2 = 100000;
-                       break;
-               default:
-                       dev_err(yas5xx->dev, "unknown device type\n");
-                       return -EINVAL;
-               }
+               *val = 1;
+               *val2 = ci->scaling_val2;
                return IIO_VAL_FRACTIONAL;
        default:
                /* Unknown request */
@@ -951,6 +934,7 @@ static const struct yas5xx_chip_info yas5xx_chip_info_tbl[] = {
                .version_names = { "A", "B" },
                .volatile_reg = yas530_volatile_reg,
                .volatile_reg_qty = ARRAY_SIZE(yas530_volatile_reg),
+               .scaling_val2 = 100000000, /* picotesla to Gauss */
        },
        [yas532] = {
                .devid = YAS532_DEVICE_ID,
@@ -958,6 +942,7 @@ static const struct yas5xx_chip_info yas5xx_chip_info_tbl[] = {
                .version_names = { "AB", "AC" },
                .volatile_reg = yas530_volatile_reg,
                .volatile_reg_qty = ARRAY_SIZE(yas530_volatile_reg),
+               .scaling_val2 = 100000, /* nanotesla to Gauss */
        },
        [yas533] = {
                .devid = YAS532_DEVICE_ID,
@@ -965,6 +950,7 @@ static const struct yas5xx_chip_info yas5xx_chip_info_tbl[] = {
                .version_names = { "AB", "AC" },
                .volatile_reg = yas530_volatile_reg,
                .volatile_reg_qty = ARRAY_SIZE(yas530_volatile_reg),
+               .scaling_val2 = 100000, /* nanotesla to Gauss */
        },
 };