iio:ad5064: 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>

diff --git a/drivers/iio/dac/ad5064.c b/drivers/iio/dac/ad5064.c
index b18e8c4..cb9c636 100644 (file)
--- a/drivers/iio/dac/ad5064.c
+++ b/drivers/iio/dac/ad5064.c
@@ -239,10 +239,9 @@ static int ad5064_read_raw(struct iio_dev *indio_dev,
                if (scale_uv < 0)
                        return scale_uv;
 
-               scale_uv = (scale_uv * 100) >> chan->scan_type.realbits;
-               *val =  scale_uv / 100000;
-               *val2 = (scale_uv % 100000) * 10;
-               return IIO_VAL_INT_PLUS_MICRO;
+               *val = scale_uv / 1000;
+               *val2 = chan->scan_type.realbits;
+               return IIO_VAL_FRACTIONAL_LOG2;
        default:
                break;
        }