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iio:ad5504: Report scale as fractional value

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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>
This commit is contained in:
Lars-Peter Clausen 2013-09-28 10:31:00 +01:00 committed by Jonathan Cameron
parent 0a99b60143
commit 54ea14339d
1 changed files with 3 additions and 6 deletions
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9
drivers/iio/dac/ad5504.c
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@ -100,7 +100,6 @@ static int ad5504_read_raw(struct iio_dev *indio_dev,
long m)
{
struct ad5504_state *st = iio_priv(indio_dev);
unsigned long scale_uv;
int ret;
switch (m) {
@ -113,11 +112,9 @@ static int ad5504_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;
*val = scale_uv / 1000;
*val2 = (scale_uv % 1000) * 1000;
return IIO_VAL_INT_PLUS_MICRO;
*val = st->vref_mv;
*val2 = chan->scan_type.realbits;
return IIO_VAL_FRACTIONAL_LOG2;
}
return -EINVAL;
}