From: Dumitru Ceclan mitrutzceclan@gmail.com

From: Dumitru Ceclan dumitru.ceclan@analog.com

[ Upstream commit 61cbfb5368dd50ed0d65ce21d305aa923581db2b ]

The cfg pointer is set before reading the channel number that the configuration should point to. This causes configurations to be shifted by one channel. For example setting bipolar to the first channel defined in the DT will cause bipolar mode to be active on the second defined channel.

Fix by moving the cfg pointer setting after reading the channel number.

Fixes: 7b8d045e497a ("iio: adc: ad7124: allow more than 8 channels") Signed-off-by: Dumitru Ceclan dumitru.ceclan@analog.com Reviewed-by: Nuno Sa nuno.sa@analog.com Link: https://patch.msgid.link/20240806085133.114547-1-dumitru.ceclan@analog.com Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: He Lugang helugang@uniontech.com --- drivers/iio/adc/ad7124.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c index e7b1d517d3de..089398a7664a 100644 --- a/drivers/iio/adc/ad7124.c +++ b/drivers/iio/adc/ad7124.c @@ -837,8 +837,6 @@ static int ad7124_parse_channel_config(struct iio_dev *indio_dev, st->channels = channels;

device_for_each_child_node_scoped(dev, child) { - cfg = &st->channels[channel].cfg; - ret = fwnode_property_read_u32(child, "reg", &channel); if (ret) return ret; @@ -856,6 +854,7 @@ static int ad7124_parse_channel_config(struct iio_dev *indio_dev, st->channels[channel].ain = AD7124_CHANNEL_AINP(ain[0]) | AD7124_CHANNEL_AINM(ain[1]);

+ cfg = &st->channels[channel].cfg; cfg->bipolar = fwnode_property_read_bool(child, "bipolar");

ret = fwnode_property_read_u32(child, "adi,reference-select", &tmp);