diff options
| author | Billy Tsai <billy_tsai@aspeedtech.com> | 2026-03-03 10:38:26 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-11 14:29:47 +0200 |
| commit | 6a3ecaa2b6f9f43b3fdab63d672b943bba411e32 (patch) | |
| tree | f1c92432e50b36ea5886454281af3b3e1356de95 | |
| parent | ab84ff8656820a2ba47b216cf11c58ba8f0f6adf (diff) | |
iio: adc: aspeed: clear reference voltage bits before configuring vref
commit 7cf2f6ed8e7a3bf481ef70b6b4a2edb8abfa5c57 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 bf2bfd6bdc41..9df6e7f68f19 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) |