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staging:iio:ad799x: 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 c0d014122d
commit b740f48a3d
1 changed files with 3 additions and 5 deletions
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8
drivers/staging/iio/adc/ad799x_core.c
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@ -163,7 +163,6 @@ static int ad799x_read_raw(struct iio_dev *indio_dev,
{
int ret;
struct ad799x_state *st = iio_priv(indio_dev);
unsigned int scale_uv;
switch (m) {
case IIO_CHAN_INFO_RAW:
@ -180,10 +179,9 @@ static int ad799x_read_raw(struct iio_dev *indio_dev,
RES_MASK(chan->scan_type.realbits);
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
scale_uv = (st->int_vref_mv * 1000) >> chan->scan_type.realbits;
*val = scale_uv / 1000;
*val2 = (scale_uv % 1000) * 1000;
return IIO_VAL_INT_PLUS_MICRO;
*val = st->int_vref_mv;
*val2 = chan->scan_type.realbits;
return IIO_VAL_FRACTIONAL_LOG2;
}
return -EINVAL;
}