diff options
Diffstat (limited to 'drivers/iio/adc/ad7292.c')
| -rw-r--r-- | drivers/iio/adc/ad7292.c | 36 |
1 files changed, 6 insertions, 30 deletions
diff --git a/drivers/iio/adc/ad7292.c b/drivers/iio/adc/ad7292.c index 6aadd14f459d..ede80f380911 100644 --- a/drivers/iio/adc/ad7292.c +++ b/drivers/iio/adc/ad7292.c @@ -17,6 +17,8 @@ #define ADI_VENDOR_ID 0x0018 +#define AD7292_INTERNAL_REF_MV 1250 + /* AD7292 registers definition */ #define AD7292_REG_VENDOR_ID 0x00 #define AD7292_REG_CONF_BANK 0x05 @@ -79,7 +81,6 @@ static const struct iio_chan_spec ad7292_channels_diff[] = { struct ad7292_state { struct spi_device *spi; - struct regulator *reg; unsigned short vref_mv; __be16 d16 __aligned(IIO_DMA_MINALIGN); @@ -250,13 +251,6 @@ static const struct iio_info ad7292_info = { .read_raw = ad7292_read_raw, }; -static void ad7292_regulator_disable(void *data) -{ - struct ad7292_state *st = data; - - regulator_disable(st->reg); -} - static int ad7292_probe(struct spi_device *spi) { struct ad7292_state *st; @@ -277,29 +271,11 @@ static int ad7292_probe(struct spi_device *spi) return -EINVAL; } - st->reg = devm_regulator_get_optional(&spi->dev, "vref"); - if (!IS_ERR(st->reg)) { - ret = regulator_enable(st->reg); - if (ret) { - dev_err(&spi->dev, - "Failed to enable external vref supply\n"); - return ret; - } - - ret = devm_add_action_or_reset(&spi->dev, - ad7292_regulator_disable, st); - if (ret) - return ret; - - ret = regulator_get_voltage(st->reg); - if (ret < 0) - return ret; + ret = devm_regulator_get_enable_read_voltage(&spi->dev, "vref"); + if (ret < 0 && ret != -ENODEV) + return ret; - st->vref_mv = ret / 1000; - } else { - /* Use the internal voltage reference. */ - st->vref_mv = 1250; - } + st->vref_mv = ret == -ENODEV ? AD7292_INTERNAL_REF_MV : ret / 1000; indio_dev->name = spi_get_device_id(spi)->name; indio_dev->modes = INDIO_DIRECT_MODE; |