From: Lars-Peter Clausen <lars@metafoo.de>
Date: Sat, 28 Sep 2013 09:31:00 +0000 (+0100)
Subject: iio:at91: Report scale as fractional value
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c45e561ee81477903b8254331cb2e28e04082de5;p=openwrt%2Fstaging%2Fblogic.git

iio:at91: 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>
Cc: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
---

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 78121949d6ef..8b93295369b0 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -366,9 +366,9 @@ static int at91_adc_read_raw(struct iio_dev *idev,
 		return IIO_VAL_INT;
 
 	case IIO_CHAN_INFO_SCALE:
-		*val = (st->vref_mv * 1000) >> chan->scan_type.realbits;
-		*val2 = 0;
-		return IIO_VAL_INT_PLUS_MICRO;
+		*val = st->vref_mv;
+		*val2 = chan->scan_type.realbits;
+		return IIO_VAL_FRACTIONAL_LOG2;
 	default:
 		break;
 	}