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staging:iio:ad7746: 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 b740f48a3d
commit 4f9be98586
1 changed files with 7 additions and 6 deletions
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drivers/staging/iio/cdc/ad7746.c
+7 -6
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@@ -656,20 +656,21 @@ static int ad7746_read_raw(struct iio_dev *indio_dev,
switch (chan->type) {
case IIO_CAPACITANCE:
/* 8.192pf / 2^24 */
*val2 = 488;
*val = 0;
*val2 = 488;
ret = IIO_VAL_INT_PLUS_NANO;
break;
case IIO_VOLTAGE:
/* 1170mV / 2^23 */
*val2 = 139475;
*val = 0;
*val = 1170;
*val2 = 23;
ret = IIO_VAL_FRACTIONAL_LOG2;
break;
default:
ret = -EINVAL;
goto out;
ret = -EINVAL;
break;
}
ret = IIO_VAL_INT_PLUS_NANO;
break;
default:
ret = -EINVAL;