Commit ddc6e823 authored Jul 22, 2022 by Marcus Folkesson Committed by Greg Kroah-Hartman Sep 15, 2022

iio: adc: mcp3911: make use of the sign bit



[ Upstream commit 8f89e33bf040bbef66386c426198622180233178 ]

The device supports negative values as well.

Fixes: 3a89b289 ("iio: adc: add support for mcp3911")
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220722130726.7627-2-marcus.folkesson@gmail.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 630a97e4

drivers/iio/adc/mcp3911.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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;