From: Urs Fässler <urs.fassler@bytesatwork.ch>
Date: Mon, 2 Feb 2015 16:12:23 +0000 (+0100)
Subject: iio: ad5686: fix optional reference voltage declaration
X-Git-Tag: v3.19.2~112
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3616899d426f40854d104eae0cd7dd6d13268f7;p=thirdparty%2Fkernel%2Fstable.git

iio: ad5686: fix optional reference voltage declaration

commit da019f59cb16570e78feaf10380ac65a3a06861e upstream.

When not using the "_optional" function, a dummy regulator is returned
and the driver fails to initialize.

Signed-off-by: Urs Fässler <urs.fassler@bytesatwork.ch>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c
index f57562aa396f4..15c73e20272d8 100644
--- a/drivers/iio/dac/ad5686.c
+++ b/drivers/iio/dac/ad5686.c
@@ -322,7 +322,7 @@ static int ad5686_probe(struct spi_device *spi)
 	st = iio_priv(indio_dev);
 	spi_set_drvdata(spi, indio_dev);
 
-	st->reg = devm_regulator_get(&spi->dev, "vcc");
+	st->reg = devm_regulator_get_optional(&spi->dev, "vcc");
 	if (!IS_ERR(st->reg)) {
 		ret = regulator_enable(st->reg);
 		if (ret)