| From e5511c816e5ac4909bdd38e85ac344e2b9b8e984 Mon Sep 17 00:00:00 2001 |
| From: Mark Brown <broonie@kernel.org> |
| Date: Mon, 20 Jun 2016 13:53:33 +0100 |
| Subject: iio:ad7266: Fix support for optional regulators |
| |
| From: Mark Brown <broonie@kernel.org> |
| |
| commit e5511c816e5ac4909bdd38e85ac344e2b9b8e984 upstream. |
| |
| 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. |
| |
| Signed-off-by: Mark Brown <broonie@kernel.org> |
| Signed-off-by: Jonathan Cameron <jic23@kernel.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/iio/adc/ad7266.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/drivers/iio/adc/ad7266.c |
| +++ b/drivers/iio/adc/ad7266.c |
| @@ -396,7 +396,7 @@ static int ad7266_probe(struct spi_devic |
| |
| 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) |