From cb8bb16caf42fd4f7eba69ee1889260af6e43ca1 Mon Sep 17 00:00:00 2001 From: Eva Rachel Retuya Date: Tue, 1 Nov 2016 01:04:32 +0800 Subject: [PATCH] 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: Lars-Peter Clausen Signed-off-by: Eva Rachel Retuya Signed-off-by: Jonathan Cameron --- drivers/staging/iio/adc/ad7192.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c index 29e32b7..3f8dc66 100644 --- a/drivers/staging/iio/adc/ad7192.c +++ b/drivers/staging/iio/adc/ad7192.c @@ -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; -- 2.7.4