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staging: iio: ad7192: add DVdd regulator

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The AD7190/AD7192/AD7193/AD7195 is supplied with two power sources:
AVdd as analog supply voltage and DVdd as digital supply voltage.

Attempt to fetch and enable the regulator 'dvdd'. Bail out if any error
occurs.

Suggested-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Eva Rachel Retuya <eraretuya@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Eva Rachel Retuya 2016-11-01 01:04:32 +08:00 committed by Jonathan Cameron
parent 3925ff0fcb
commit cb8bb16caf
1 changed files with 18 additions and 1 deletions
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19
drivers/staging/iio/adc/ad7192.c
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@ -153,6 +153,7 @@
struct ad7192_state {
struct regulator *reg;
struct regulator *dvdd;
u16 int_vref_mv;
u32 mclk;
u32 f_order;
@ -642,6 +643,19 @@ static int ad7192_probe(struct spi_device *spi)
dev_err(&spi->dev, "Failed to enable specified AVdd supply\n");
return ret;
}
st->dvdd = devm_regulator_get(&spi->dev, "dvdd");
if (IS_ERR(st->dvdd)) {
ret = PTR_ERR(st->dvdd);
goto error_disable_reg;
}
ret = regulator_enable(st->dvdd);
if (ret) {
dev_err(&spi->dev, "Failed to enable specified DVdd supply\n");
goto error_disable_reg;
}
voltage_uv = regulator_get_voltage(st->reg);
if (pdata->vref_mv)
@ -677,7 +691,7 @@ static int ad7192_probe(struct spi_device *spi)
ret = ad_sd_setup_buffer_and_trigger(indio_dev);
if (ret)
goto error_disable_reg;
goto error_disable_dvdd;
ret = ad7192_setup(st, pdata);
if (ret)
@ -690,6 +704,8 @@ static int ad7192_probe(struct spi_device *spi)
error_remove_trigger:
ad_sd_cleanup_buffer_and_trigger(indio_dev);
error_disable_dvdd:
regulator_disable(st->dvdd);
error_disable_reg:
regulator_disable(st->reg);
@ -704,6 +720,7 @@ static int ad7192_remove(struct spi_device *spi)
iio_device_unregister(indio_dev);
ad_sd_cleanup_buffer_and_trigger(indio_dev);
regulator_disable(st->dvdd);
regulator_disable(st->reg);
return 0;