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| author | Lars-Peter Clausen <lars@metafoo.de> | 2013-09-28 10:31:00 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2013-10-01 16:19:11 +0100 |
| commit | 213983cd32a7d983675d86ece17ac040bd39fd47 (patch) | |
| tree | 41febae130f0d962b35d9f05a275af7af04f1756 /drivers/iio/dac/ad5791.c | |
| parent | 3f83dae88422992140b6125ab866cdec9fd7b3b6 (diff) | |
| download | lwn-213983cd32a7d983675d86ece17ac040bd39fd47.tar.gz lwn-213983cd32a7d983675d86ece17ac040bd39fd47.zip | |
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/dac/ad5791.c')
| -rw-r--r-- | drivers/iio/dac/ad5791.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/iio/dac/ad5791.c b/drivers/iio/dac/ad5791.c index 3cee89be68c3..d64acbd89482 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); |