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staging:iio:ad7606: 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
commit 9324131b5a
1 changed files with 3 additions and 6 deletions
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9
drivers/staging/iio/adc/ad7606_core.c
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@ -85,7 +85,6 @@ static int ad7606_read_raw(struct iio_dev *indio_dev,
{
int ret;
struct ad7606_state *st = iio_priv(indio_dev);
unsigned int scale_uv;
switch (m) {
case IIO_CHAN_INFO_RAW:
@ -101,11 +100,9 @@ static int ad7606_read_raw(struct iio_dev *indio_dev,
*val = (short) ret;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
scale_uv = (st->range * 1000 * 2)
>> st->chip_info->channels[0].scan_type.realbits;
*val = scale_uv / 1000;
*val2 = (scale_uv % 1000) * 1000;
return IIO_VAL_INT_PLUS_MICRO;
*val = st->range * 2;
*val2 = st->chip_info->channels[0].scan_type.realbits;
return IIO_VAL_FRACTIONAL_LOG2;
}
return -EINVAL;
}