iio: ad5686: fix optional reference voltage declaration

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>
Cc: stable@vger.kernel.org
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c
index f57562aa396f..15c73e20272d 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)