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authorLars-Peter Clausen <lars@metafoo.de>2013-09-28 13:31:00 +0400
committerJonathan Cameron <jic23@kernel.org>2013-10-01 19:19:09 +0400
commit0a99b6014343e39d7e01ebfc386fb16c8a5a6826 (patch)
tree2c290481aad87bae73580b07268724bb54cf252f /drivers/iio
parentbc7c49bc77ba95609236f23082a38ec160416a8d (diff)
downloadlinux-0a99b6014343e39d7e01ebfc386fb16c8a5a6826.tar.xz
iio:ad5446: 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>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/dac/ad5446.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/iio/dac/ad5446.c b/drivers/iio/dac/ad5446.c
index 8e28d3633e22..1263b0e5ad84 100644
--- a/drivers/iio/dac/ad5446.c
+++ b/drivers/iio/dac/ad5446.c
@@ -163,18 +163,15 @@ static int ad5446_read_raw(struct iio_dev *indio_dev,
long m)
{
struct ad5446_state *st = iio_priv(indio_dev);
- unsigned long scale_uv;
switch (m) {
case IIO_CHAN_INFO_RAW:
*val = st->cached_val;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
- scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;
- *val = scale_uv / 1000;
- *val2 = (scale_uv % 1000) * 1000;
- return IIO_VAL_INT_PLUS_MICRO;
-
+ *val = st->vref_mv;
+ *val2 = chan->scan_type.realbits;
+ return IIO_VAL_FRACTIONAL_LOG2;
}
return -EINVAL;
}