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Commit cb8bb16c authored by Eva Rachel Retuya's avatar Eva Rachel Retuya Committed by Jonathan Cameron
Browse files

staging: iio: ad7192: add DVdd regulator 



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: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarEva Rachel Retuya <eraretuya@gmail.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 3925ff0f

drivers/staging/iio/adc/ad7192.c

+18 −1
Original line number Diff line number Diff line
@@ -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;