iio:max517: 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/max517.c b/drivers/iio/dac/max517.c
index 83adcbf..d26be14 100644
--- a/drivers/iio/dac/max517.c
+++ b/drivers/iio/dac/max517.c
@@ -82,15 +82,13 @@
long m)
{
struct max517_data *data = iio_priv(indio_dev);
- unsigned int scale_uv;
switch (m) {
case IIO_CHAN_INFO_SCALE:
/* Corresponds to Vref / 2^(bits) */
- scale_uv = (data->vref_mv[chan->channel] * 1000) >> 8;
- *val = scale_uv / 1000000;
- *val2 = scale_uv % 1000000;
- return IIO_VAL_INT_PLUS_MICRO;
+ *val = data->vref_mv[chan->channel];
+ *val2 = 8;
+ return IIO_VAL_FRACTIONAL_LOG2;
default:
break;
}