diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2013-09-28 13:31:00 +0400 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2013-10-01 19:19:09 +0400 |
| commit | bc7c49bc77ba95609236f23082a38ec160416a8d (patch) | |
| tree | a12e70772e8e91346c8bbe33d7c4f1eb85d46ffe /drivers/iio/dac/ad5421.c | |
| parent | 4f2c188597858aa215754be7279e91d778502d8e (diff) | |
| download | linux-bc7c49bc77ba95609236f23082a38ec160416a8d.tar.xz | |
iio:ad5421: 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/ad5421.c')
| -rw-r--r-- | drivers/iio/dac/ad5421.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/drivers/iio/dac/ad5421.c b/drivers/iio/dac/ad5421.c index 1f78b14abb7d..567c4bd546e5 100644 --- a/drivers/iio/dac/ad5421.c +++ b/drivers/iio/dac/ad5421.c @@ -281,18 +281,11 @@ static inline unsigned int ad5421_get_offset(struct ad5421_state *st) return (min * (1 << 16)) / (max - min); } -static inline unsigned int ad5421_get_scale(struct ad5421_state *st) -{ - unsigned int min, max; - - ad5421_get_current_min_max(st, &min, &max); - return ((max - min) * 1000) / (1 << 16); -} - static int ad5421_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long m) { struct ad5421_state *st = iio_priv(indio_dev); + unsigned int min, max; int ret; if (chan->type != IIO_CURRENT) @@ -306,9 +299,10 @@ static int ad5421_read_raw(struct iio_dev *indio_dev, *val = ret; return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: - *val = 0; - *val2 = ad5421_get_scale(st); - return IIO_VAL_INT_PLUS_MICRO; + ad5421_get_current_min_max(st, &min, &max); + *val = max - min; + *val2 = (1 << 16) * 1000; + return IIO_VAL_FRACTIONAL; case IIO_CHAN_INFO_OFFSET: *val = ad5421_get_offset(st); return IIO_VAL_INT; |