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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 16:19:08 +0100 |
| commit | ca3bc8b62634215f899cefde52a31cc6600a686c (patch) | |
| tree | 4f2b71f4652888b3ddea04e01134d163ef10d9cb /drivers | |
| parent | 25682ae5e40f04cb86321dfc5a6713e4b45b55ea (diff) | |
| download | linux-ca3bc8b62634215f899cefde52a31cc6600a686c.tar.bz2 | |
iio:ad5360: 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')
| -rw-r--r-- | drivers/iio/dac/ad5360.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/iio/dac/ad5360.c b/drivers/iio/dac/ad5360.c index d2da71ece740..b968af50db0a 100644 --- a/drivers/iio/dac/ad5360.c +++ b/drivers/iio/dac/ad5360.c @@ -379,15 +379,14 @@ static int ad5360_read_raw(struct iio_dev *indio_dev, *val = ret >> chan->scan_type.shift; return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: - /* vout = 4 * vref * dac_code */ - scale_uv = ad5360_get_channel_vref(st, chan->channel) * 4 * 100; + scale_uv = ad5360_get_channel_vref(st, chan->channel); if (scale_uv < 0) return scale_uv; - scale_uv >>= (chan->scan_type.realbits); - *val = scale_uv / 100000; - *val2 = (scale_uv % 100000) * 10; - return IIO_VAL_INT_PLUS_MICRO; + /* vout = 4 * vref * dac_code */ + *val = scale_uv * 4 / 1000; + *val2 = chan->scan_type.realbits; + return IIO_VAL_FRACTIONAL_LOG2; case IIO_CHAN_INFO_CALIBBIAS: ret = ad5360_read(indio_dev, AD5360_READBACK_OFFSET, chan->address); |