diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2013-09-28 10:31:00 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2013-10-01 16:19:13 +0100 |
| commit | c0d014122de56d17f65048e4737d039c89aa7e8f (patch) | |
| tree | e7727cc0e2f54b7e4186ee5e43aec108f90afb97 /drivers/staging/iio/adc/ad7780.c | |
| parent | 9324131b5a3cccd4acf1408539502503a5bee206 (diff) | |
| download | linux-c0d014122de56d17f65048e4737d039c89aa7e8f.tar.bz2 | |
staging:iio:ad7780: 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/staging/iio/adc/ad7780.c')
| -rw-r--r-- | drivers/staging/iio/adc/ad7780.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c index 4f2522a9edfb..273add3ed63f 100644 --- a/drivers/staging/iio/adc/ad7780.c +++ b/drivers/staging/iio/adc/ad7780.c @@ -90,17 +90,14 @@ static int ad7780_read_raw(struct iio_dev *indio_dev, long m) { struct ad7780_state *st = iio_priv(indio_dev); - unsigned long scale_uv; switch (m) { case IIO_CHAN_INFO_RAW: return ad_sigma_delta_single_conversion(indio_dev, chan, val); case IIO_CHAN_INFO_SCALE: - scale_uv = (st->int_vref_mv * 100000 * st->gain) - >> (chan->scan_type.realbits - 1); - *val = scale_uv / 100000; - *val2 = (scale_uv % 100000) * 10; - return IIO_VAL_INT_PLUS_MICRO; + *val = st->int_vref_mv * st->gain; + *val2 = chan->scan_type.realbits - 1; + return IIO_VAL_FRACTIONAL_LOG2; case IIO_CHAN_INFO_OFFSET: *val -= (1 << (chan->scan_type.realbits - 1)); return IIO_VAL_INT; |