This is a note to let you know that I've just added the patch titled iio: adc: mcp3911: make use of the sign bit to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: iio-adc-mcp3911-make-use-of-the-sign-bit.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 6b8eb16fd92ae4c0fef11065f7ad3bd0c025af61 Author: Marcus Folkesson <marcus.folkesson@xxxxxxxxx> Date: Fri Jul 22 15:07:18 2022 +0200 iio: adc: mcp3911: make use of the sign bit [ Upstream commit 8f89e33bf040bbef66386c426198622180233178 ] The device supports negative values as well. Fixes: 3a89b289df5d ("iio: adc: add support for mcp3911") Signed-off-by: Marcus Folkesson <marcus.folkesson@xxxxxxxxx> Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> Link: https://lore.kernel.org/r/20220722130726.7627-2-marcus.folkesson@xxxxxxxxx Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/iio/adc/mcp3911.c b/drivers/iio/adc/mcp3911.c index e573da5397bb3..81eeb00842112 100644 --- a/drivers/iio/adc/mcp3911.c +++ b/drivers/iio/adc/mcp3911.c @@ -111,6 +111,8 @@ static int mcp3911_read_raw(struct iio_dev *indio_dev, if (ret) goto out; + *val = sign_extend32(*val, 23); + ret = IIO_VAL_INT; break;