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iio:ad5686: 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>
This commit is contained in:
Lars-Peter Clausen 2013-09-28 10:31:00 +01:00 committed by Jonathan Cameron
parent 14229e87a9
commit ecc7e948bc
1 changed files with 3 additions and 7 deletions
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10
drivers/iio/dac/ad5686.c
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@ -201,7 +201,6 @@ static int ad5686_read_raw(struct iio_dev *indio_dev,
long m) long m)
{ {
struct ad5686_state *st = iio_priv(indio_dev); struct ad5686_state *st = iio_priv(indio_dev);
unsigned long scale_uv;
int ret; int ret;
switch (m) { switch (m) {
@ -214,12 +213,9 @@ static int ad5686_read_raw(struct iio_dev *indio_dev,
*val = ret; *val = ret;
return IIO_VAL_INT; return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE: case IIO_CHAN_INFO_SCALE:
scale_uv = (st->vref_mv * 100000) *val = st->vref_mv;
>> (chan->scan_type.realbits); *val2 = chan->scan_type.realbits;
*val = scale_uv / 100000; return IIO_VAL_FRACTIONAL_LOG2;
*val2 = (scale_uv % 100000) * 10;
return IIO_VAL_INT_PLUS_MICRO;
} }
return -EINVAL; return -EINVAL;
} }