diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2013-09-28 09:31:00 (GMT) |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2013-10-01 15:19:13 (GMT) |
| commit | d6570b33a1c0620774fe693030ef9e0317dafd84 (patch) | |
| tree | 4c437003b1a50e52e0009e95157cd9f77205389d | |
| parent | b2171677cbf8c781679b588fdffabfe0eaecbcdc (diff) | |
| download | linux-fsl-qoriq-d6570b33a1c0620774fe693030ef9e0317dafd84.tar.xz | |
staging:iio:ad7280a: 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>
| -rw-r--r-- | drivers/staging/iio/adc/ad7280a.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c index e7191e4..8209fa5 100644 --- a/drivers/staging/iio/adc/ad7280a.c +++ b/drivers/staging/iio/adc/ad7280a.c @@ -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; } |