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iio: adc: ad7292: use devm_regulator_get_enable_read_voltage

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This makes use of the new devm_regulator_get_enable_read_voltage()
function to reduce boilerplate code.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240612-iio-adc-ref-supply-refactor-v2-3-fa622e7354e9@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
David Lechner 2024-06-12 16:03:07 -05:00 committed by Jonathan Cameron
parent 634c6b5ab6
commit c53ccb4ee1
1 changed files with 6 additions and 30 deletions
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34
drivers/iio/adc/ad7292.c
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@ -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)
ret = devm_regulator_get_enable_read_voltage(&spi->dev, "vref");
if (ret < 0 && ret != -ENODEV)
return ret;
ret = regulator_get_voltage(st->reg);
if (ret < 0)
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;