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staging:iio:spear_adc: 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>
Cc: Stefan Roese <sr@denx.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 4f9be98586
commit bfbab2bcf9
1 changed files with 3 additions and 4 deletions
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7
drivers/staging/iio/adc/spear_adc.c
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@ -168,10 +168,9 @@ static int spear_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
scale_mv = (info->vref_external * 1000) >> DATA_BITS;
*val = scale_mv / 1000;
*val2 = (scale_mv % 1000) * 1000;
return IIO_VAL_INT_PLUS_MICRO;
*val = info->vref_external;
*val2 = DATA_BITS;
return IIO_VAL_FRACTIONAL_LOG2;
}
return -EINVAL;