iio:mcp4725: 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: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/iio/dac/mcp4725.c b/drivers/iio/dac/mcp4725.c
index 7a42d85..d982752 100644
--- a/drivers/iio/dac/mcp4725.c
+++ b/drivers/iio/dac/mcp4725.c
@@ -239,17 +239,15 @@
int *val, int *val2, long mask)
{
struct mcp4725_data *data = iio_priv(indio_dev);
- unsigned long scale_uv;
switch (mask) {
case IIO_CHAN_INFO_RAW:
*val = data->dac_value;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
- scale_uv = (data->vref_mv * 1000) >> 12;
- *val = scale_uv / 1000000;
- *val2 = scale_uv % 1000000;
- return IIO_VAL_INT_PLUS_MICRO;
+ *val = data->vref_mv;
+ *val2 = 12;
+ return IIO_VAL_FRACTIONAL_LOG2;
}
return -EINVAL;
}