From: Lars-Peter Clausen Date: Fri, 3 Apr 2020 13:27:13 +0000 (+0200) Subject: iio: xilinx-xadc: Fix ADC-B powerdown X-Git-Tag: microblaze-v5.10~910^2~5^2~9 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=e44ec7794d88f918805d700240211a9ec05ed89d;p=linux-2.6-microblaze.git iio: xilinx-xadc: Fix ADC-B powerdown 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 Fixes: bdc8cda1d010 ("iio:adc: Add Xilinx XADC driver") Cc: Signed-off-by: Jonathan Cameron --- diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c index ec227b358cd6..f50e04a8b0ec 100644 --- a/drivers/iio/adc/xilinx-xadc-core.c +++ b/drivers/iio/adc/xilinx-xadc-core.c @@ -722,13 +722,14 @@ 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; }