diff options
| author | Billy Tsai <billy_tsai@aspeedtech.com> | 2026-03-03 10:38:26 +0800 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2026-03-07 13:27:38 +0000 |
| commit | 7cf2f6ed8e7a3bf481ef70b6b4a2edb8abfa5c57 (patch) | |
| tree | 2d2017a95cc16aa8fa764eb8b31618a861b05b18 /drivers | |
| parent | 2f168094177f8553a36046afce139001801ca917 (diff) | |
iio: adc: aspeed: clear reference voltage bits before configuring vref
Ensures the reference voltage bits are cleared in the ADC engine
control register before configuring the voltage reference. This
avoids potential misconfigurations caused by residual bits.
Fixes: 1b5ceb55fec2 ("iio: adc: aspeed: Support ast2600 adc.")
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iio/adc/aspeed_adc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c index 4be44c524b4d..83a9885b9ae4 100644 --- a/drivers/iio/adc/aspeed_adc.c +++ b/drivers/iio/adc/aspeed_adc.c @@ -415,6 +415,7 @@ static int aspeed_adc_vref_config(struct iio_dev *indio_dev) } adc_engine_control_reg_val = readl(data->base + ASPEED_REG_ENGINE_CONTROL); + adc_engine_control_reg_val &= ~ASPEED_ADC_REF_VOLTAGE; ret = devm_regulator_get_enable_read_voltage(data->dev, "vref"); if (ret < 0 && ret != -ENODEV) |