iio: afe: rescale: expose scale processing function
[ Upstream commit bc437f75 ] In preparation for the addition of kunit tests, expose the logic responsible for combining channel scales. Signed-off-by: Liam Beguin <liambeguin@gmail.com> Reviewed-by: Peter Rosin <peda@axentia.se> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20220213025739.2561834-2-liambeguin@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Stable-dep-of: bee44839 ("iio: afe: rescale: Accept only offset channels") Signed-off-by: Sasha Levin <sashal@kernel.org>
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