iio: light: noa1305: Report available scale values

Make use of the new static table of scale values and expose available
scale values via sysfs attribute of the IIO device.

Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://patch.msgid.link/20240715183120.143417-4-marex@denx.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/light/noa1305.c b/drivers/iio/light/noa1305.c
index 202a5c1bbf7983c3259f5c48ea335dfe246abbb3..e778714a942a0641ce93dbc3d7932619580fa514 100644 (file)
--- a/drivers/iio/light/noa1305.c
+++ b/drivers/iio/light/noa1305.c
@@ -102,9 +102,29 @@ static const struct iio_chan_spec noa1305_channels[] = {
                .type = IIO_LIGHT,
                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
                .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
+               .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SCALE),
        }
 };
 
+static int noa1305_read_avail(struct iio_dev *indio_dev,
+                             struct iio_chan_spec const *chan,
+                             const int **vals, int *type,
+                             int *length, long mask)
+{
+       if (chan->type != IIO_LIGHT)
+               return -EINVAL;
+
+       switch (mask) {
+       case IIO_CHAN_INFO_SCALE:
+               *vals = noa1305_scale_available;
+               *length = ARRAY_SIZE(noa1305_scale_available);
+               *type = IIO_VAL_FRACTIONAL;
+               return IIO_AVAIL_LIST;
+       default:
+               return -EINVAL;
+       }
+}
+
 static int noa1305_read_raw(struct iio_dev *indio_dev,
                            struct iio_chan_spec const *chan,
                            int *val, int *val2, long mask)
@@ -125,6 +145,7 @@ static int noa1305_read_raw(struct iio_dev *indio_dev,
 }
 
 static const struct iio_info noa1305_info = {
+       .read_avail = noa1305_read_avail,
        .read_raw = noa1305_read_raw,
 };