From: Lars-Peter Clausen <lars@metafoo.de>
Date: Sat, 28 Sep 2013 09:31:00 +0000 (+0100)
Subject: iio:ad7476: Report scale as fractional value
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d88c89db9a7550c2ed6551f73b6702faee190434;p=openwrt%2Fstaging%2Fblogic.git

iio:ad7476: 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/adc/ad7476.c b/drivers/iio/adc/ad7476.c
index 8d808b9de909..d141d452c3d1 100644
--- a/drivers/iio/adc/ad7476.c
+++ b/drivers/iio/adc/ad7476.c
@@ -127,10 +127,9 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
 		} else {
 			scale_uv = st->chip_info->int_vref_uv;
 		}
-		scale_uv >>= chan->scan_type.realbits;
-		*val =  scale_uv / 1000;
-		*val2 = (scale_uv % 1000) * 1000;
-		return IIO_VAL_INT_PLUS_MICRO;
+		*val = scale_uv / 1000;
+		*val2 = chan->scan_type.realbits;
+		return IIO_VAL_FRACTIONAL_LOG2;
 	}
 	return -EINVAL;
 }