6.17-stable review patch. If anyone has any objections, please let me know.

------------------

From: Marcelo Schmitt marcelo.schmitt@analog.com

commit ffc74ad539136ae9e16f7b5f2e4582e88018cd49 upstream.

Previously, the driver always used the amount of precision bits of differential input channels to provide the scale to mV. Though, differential and common-mode voltage channels have different amount of precision bits and the correct number of precision bits must be considered to get to a proper mV scale factor for each one. Use channel specific number of precision bits to provide the correct scale value for each channel.

Fixes: de67f28abe58 ("iio: adc: ad4030: check scan_type for error") Fixes: 949abd1ca5a4 ("iio: adc: ad4030: add averaging support") Signed-off-by: Marcelo Schmitt marcelo.schmitt@analog.com Reviewed-by: David Lechner dlechner@baylibre.com 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/ad4030.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/adc/ad4030.c +++ b/drivers/iio/adc/ad4030.c @@ -385,7 +385,7 @@ static int ad4030_get_chan_scale(struct struct ad4030_state *st = iio_priv(indio_dev); const struct iio_scan_type *scan_type;

- scan_type = iio_get_current_scan_type(indio_dev, st->chip->channels); + scan_type = iio_get_current_scan_type(indio_dev, chan); if (IS_ERR(scan_type)) return PTR_ERR(scan_type);