patch "iio:ad7266: Fix support for optional regulators" added to staging-linus

This is a note to let you know that I've just added the patch titled

iio:ad7266: Fix support for optional regulators

to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From: Mark Brown <[email protected]>
Date: Mon, 20 Jun 2016 13:53:33 +0100
Subject: iio:ad7266: Fix support for optional regulators

The ad7266 driver attempts to support deciding between the use of internal and external power supplies by checking to see if an error is returned when requesting the regulator. This doesn't work with the current code since the driver uses a normal regulator_get() which is for non-optional supplies and so assumes that if a regulator is not provided by the platform then this is a bug in the platform integration and so substitutes a dummy regulator. Use regulator_get_optional() instead which indicates to the framework that the regulator may be absent and provides a dummy regulator instead.

---
 drivers/iio/adc/ad7266.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 835d45db258f..655b36b4e9cb 100644
@@ -396,7 +396,7 @@ static int ad7266_probe(struct spi_device *spi)
 
 	st = iio_priv(indio_dev);
 
-	st->reg = devm_regulator_get(&spi->dev, "vref");
+	st->reg = devm_regulator_get_optional(&spi->dev, "vref");
 	if (!IS_ERR(st->reg)) {
 		ret = regulator_enable(st->reg);
 		if (ret)

2.9.0