From: Lars-Peter Clausen <lars@metafoo.de>
Date: Sat, 28 Sep 2013 09:31:00 +0000 (+0100)
Subject: iio:ad5624r: Report scale as fractional value
X-Git-Tag: firefly_0821_release~176^2~5057^2~453^2~42
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=14229e87a977c3c33bd33a95b77d2de48d2b46e9;p=firefly-linux-kernel-4.4.55.git

iio:ad5624r: 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>
---

diff --git a/drivers/iio/dac/ad5624r_spi.c b/drivers/iio/dac/ad5624r_spi.c
index dbb1289cc7a6..774dd968145b 100644
--- a/drivers/iio/dac/ad5624r_spi.c
+++ b/drivers/iio/dac/ad5624r_spi.c
@@ -50,15 +50,12 @@ static int ad5624r_read_raw(struct iio_dev *indio_dev,
 			   long m)
 {
 	struct ad5624r_state *st = iio_priv(indio_dev);
-	unsigned long scale_uv;
 
 	switch (m) {
 	case IIO_CHAN_INFO_SCALE:
-		scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;
-		*val =  scale_uv / 1000;
-		*val2 = (scale_uv % 1000) * 1000;
-		return IIO_VAL_INT_PLUS_MICRO;
-
+		*val = st->vref_mv;
+		*val2 = chan->scan_type.realbits;
+		return IIO_VAL_FRACTIONAL_LOG2;
 	}
 	return -EINVAL;
 }