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 | b740f48a3d0d118b160db7c9559fb75de8af8657 (patch) | |
| tree | 2f546049a02a6833f0651b8520bb023df88d2c6e | |
| parent | c0d014122de56d17f65048e4737d039c89aa7e8f (diff) | |
| download | linux-fsl-qoriq-b740f48a3d0d118b160db7c9559fb75de8af8657.tar.xz | |
staging:iio:ad799x: 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/ad799x_core.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c index 3f5142b..eb6a690 100644 --- a/drivers/staging/iio/adc/ad799x_core.c +++ b/drivers/staging/iio/adc/ad799x_core.c @@ -163,7 +163,6 @@ static int ad799x_read_raw(struct iio_dev *indio_dev, { int ret; struct ad799x_state *st = iio_priv(indio_dev); - unsigned int scale_uv; switch (m) { case IIO_CHAN_INFO_RAW: @@ -180,10 +179,9 @@ static int ad799x_read_raw(struct iio_dev *indio_dev, RES_MASK(chan->scan_type.realbits); return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: - scale_uv = (st->int_vref_mv * 1000) >> chan->scan_type.realbits; - *val = scale_uv / 1000; - *val2 = (scale_uv % 1000) * 1000; - return IIO_VAL_INT_PLUS_MICRO; + *val = st->int_vref_mv; + *val2 = chan->scan_type.realbits; + return IIO_VAL_FRACTIONAL_LOG2; } return -EINVAL; } |