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Use DEVICE_ATTR_RW() helper instead of plain DEVICE_ATTR(), which makes the code a bit shorter and easier to read. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Acked-by: Jarkko Nikula <jarkko.nikula@bitmer.com> Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com> Link: https://lore.kernel.org/r/20210528063033.19904-1-yuehaibing@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>