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staging:iio:ad7280a: 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 b2171677cb
commit d6570b33a1
1 changed files with 4 additions and 6 deletions
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10
drivers/staging/iio/adc/ad7280a.c
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@@ -783,7 +783,6 @@ static int ad7280_read_raw(struct iio_dev *indio_dev,
long m)
{
struct ad7280_state *st = iio_priv(indio_dev);
unsigned int scale_uv;
int ret;
switch (m) {
@@ -804,13 +803,12 @@ static int ad7280_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
if ((chan->address & 0xFF) <= AD7280A_CELL_VOLTAGE_6)
scale_uv = (4000 * 1000) >> AD7280A_BITS;
*val = 4000;
else
scale_uv = (5000 * 1000) >> AD7280A_BITS;
*val = 5000;
*val = scale_uv / 1000;
*val2 = (scale_uv % 1000) * 1000;
return IIO_VAL_INT_PLUS_MICRO;
*val2 = AD7280A_BITS;
return IIO_VAL_FRACTIONAL_LOG2;
}
return -EINVAL;
}