[PATCH v3 3/5] iio: light: stk3310: move the data registers into the channel address

[Jorijn van der Graaf <jorijnvdgraaf@catcrafts.net>]

The RAW read selects its data register with a per-channel-type branch.
Record each channel's data register in its .address field and read
from there, so adding a channel does not grow the branch.

Suggested-by: Jonathan Cameron <jic23@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Assisted-by: Claude:claude-fable-5
Signed-off-by: Jorijn van der Graaf <jorijnvdgraaf@catcrafts.net>
---
 drivers/iio/light/stk3310.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
index 5b5b6812edc7..156888969366 100644
--- a/drivers/iio/light/stk3310.c
+++ b/drivers/iio/light/stk3310.c
@@ -184,6 +184,7 @@ static const struct iio_chan_spec_ext_info stk3310_ext_info[] = {
 static const struct iio_chan_spec stk3310_channels[] = {
 	{
 		.type = IIO_LIGHT,
+		.address = STK3310_REG_ALS_DATA_MSB,
 		.info_mask_separate =
 			BIT(IIO_CHAN_INFO_RAW) |
 			BIT(IIO_CHAN_INFO_SCALE) |
@@ -191,6 +192,7 @@ static const struct iio_chan_spec stk3310_channels[] = {
 	},
 	{
 		.type = IIO_PROXIMITY,
+		.address = STK3310_REG_PS_DATA_MSB,
 		.info_mask_separate =
 			BIT(IIO_CHAN_INFO_RAW) |
 			BIT(IIO_CHAN_INFO_SCALE) |
@@ -370,25 +372,20 @@ static int stk3310_read_raw(struct iio_dev *indio_dev,
 			    struct iio_chan_spec const *chan,
 			    int *val, int *val2, long mask)
 {
-	u8 reg;
 	__be16 buf;
 	int ret;
 	unsigned int index;
 	struct stk3310_data *data = iio_priv(indio_dev);
 	struct i2c_client *client = data->client;
+	struct regmap *map = data->regmap;
 
 	if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY)
 		return -EINVAL;
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-		if (chan->type == IIO_LIGHT)
-			reg = STK3310_REG_ALS_DATA_MSB;
-		else
-			reg = STK3310_REG_PS_DATA_MSB;
-
 		mutex_lock(&data->lock);
-		ret = regmap_bulk_read(data->regmap, reg, &buf, sizeof(buf));
+		ret = regmap_bulk_read(map, chan->address, &buf, sizeof(buf));
 		if (ret < 0) {
 			dev_err(&client->dev, "register read failed\n");
 			mutex_unlock(&data->lock);
-- 
2.55.0