From: Lars-Peter Clausen <lars@metafoo.de> commit e44ec7794d88f918805d700240211a9ec05ed89d upstream. The check for shutting down the second ADC is inverted. This causes it to be powered down when it should be enabled. As a result channels that are supposed to be handled by the second ADC return invalid conversion results. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Fixes: bdc8cda1d010 ("iio:adc: Add Xilinx XADC driver") Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/iio/adc/xilinx-xadc-core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c index 1ae86e7..24badae 100644 --- a/drivers/iio/adc/xilinx-xadc-core.c +++ b/drivers/iio/adc/xilinx-xadc-core.c @@ -723,13 +723,14 @@ static int xadc_power_adc_b(struct xadc *xadc, unsigned int seq_mode) { uint16_t val; + /* Powerdown the ADC-B when it is not needed. */ switch (seq_mode) { case XADC_CONF1_SEQ_SIMULTANEOUS: case XADC_CONF1_SEQ_INDEPENDENT: - val = XADC_CONF2_PD_ADC_B; + val = 0; break; default: - val = 0; + val = XADC_CONF2_PD_ADC_B; break; } -- 1.8.3