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authorLars-Peter Clausen <lars@metafoo.de>2013-09-28 10:31:00 +0100
committerJonathan Cameron <jic23@kernel.org>2013-10-01 16:19:11 +0100
commit213983cd32a7d983675d86ece17ac040bd39fd47 (patch)
tree41febae130f0d962b35d9f05a275af7af04f1756 /drivers/iio
parent3f83dae88422992140b6125ab866cdec9fd7b3b6 (diff)
downloadop-kernel-dev-213983cd32a7d983675d86ece17ac040bd39fd47.zip
op-kernel-dev-213983cd32a7d983675d86ece17ac040bd39fd47.tar.gz
iio:ad5791: 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/ad5791.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/iio/dac/ad5791.c b/drivers/iio/dac/ad5791.c
index 3cee89b..d64acbd 100644
--- a/drivers/iio/dac/ad5791.c
+++ b/drivers/iio/dac/ad5791.c
@@ -270,9 +270,9 @@ static int ad5791_read_raw(struct iio_dev *indio_dev,
*val >>= chan->scan_type.shift;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
- *val = 0;
- *val2 = (((u64)st->vref_mv) * 1000000ULL) >> chan->scan_type.realbits;
- return IIO_VAL_INT_PLUS_MICRO;
+ *val = st->vref_mv;
+ *val2 = (1 << chan->scan_type.realbits) - 1;
+ return IIO_VAL_FRACTIONAL;
case IIO_CHAN_INFO_OFFSET:
val64 = (((u64)st->vref_neg_mv) << chan->scan_type.realbits);
do_div(val64, st->vref_mv);
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