iio:at91: 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>
Cc: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 78121949d6ef..8b93295369b0 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -366,9 +366,9 @@ static int at91_adc_read_raw(struct iio_dev *idev,
                 return IIO_VAL_INT;
 
         case IIO_CHAN_INFO_SCALE:
-                *val = (st->vref_mv * 1000) >> chan->scan_type.realbits;
-                *val2 = 0;
-                return IIO_VAL_INT_PLUS_MICRO;
+                *val = st->vref_mv;
+                *val2 = chan->scan_type.realbits;
+                return IIO_VAL_FRACTIONAL_LOG2;
         default:
                 break;
         }