linux-kernel - [PATCH 3.16.y-ckt 049/165] iio: ad5686: fix optional reference voltage declaration

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Message-Id: <1427292138-7021-50-git-send-email-luis.henriques@canonical.com>
Date:	Wed, 25 Mar 2015 14:00:22 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Urs Fässler <urs.fassler@...esatwork.ch>,
	Jonathan Cameron <jic23@...nel.org>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 049/165] iio: ad5686: fix optional reference voltage declaration

3.16.7-ckt9 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: =?UTF-8?q?Urs=20F=C3=A4ssler?= <urs.fassler@...esatwork.ch>

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@...esatwork.ch>
Acked-by: Lars-Peter Clausen <lars@...afoo.de>
Signed-off-by: Jonathan Cameron <jic23@...nel.org>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/iio/dac/ad5686.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c
index 17aca4d9bd06..861ba3d60163 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)
--
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