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由 Chris Lesiak 提交于
When configured via device tree, the associated iio device needs to be measuring voltage for the conversion to resistance to be correct. Return -EINVAL if that is not the case. Signed-off-by: NChris Lesiak <chris.lesiak@licor.com> Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
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