iio:max1363: Report scale as fractional value

Move the complexity of calculating the fixed point scale to the core.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
index b4bc166d57b0..2b34d2f02cf3 100644
--- a/drivers/iio/adc/max1363.c
+++ b/drivers/iio/adc/max1363.c
@@ -397,7 +397,6 @@ static int max1363_read_raw(struct iio_dev *indio_dev,
 {
         struct max1363_state *st = iio_priv(indio_dev);
         int ret;
-        unsigned long scale_uv;
 
         switch (m) {
         case IIO_CHAN_INFO_RAW:
@@ -406,10 +405,9 @@ static int max1363_read_raw(struct iio_dev *indio_dev,
                         return ret;
                 return IIO_VAL_INT;
         case IIO_CHAN_INFO_SCALE:
-                scale_uv = st->vref_uv >> st->chip_info->bits;
-                *val = scale_uv / 1000;
-                *val2 = (scale_uv % 1000) * 1000;
-                return IIO_VAL_INT_PLUS_MICRO;
+                *val = st->vref_uv / 1000;
+                *val2 = st->chip_info->bits;
+                return IIO_VAL_FRACTIONAL_LOG2;
         default:
                 return -EINVAL;
         }