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@xxxxxxxxxx>
Signed-off-by: Eva Rachel Retuya <eraretuya@xxxxxxxxx>
---
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
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