mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-03-22 07:27:12 +08:00
01e10d0272
After commit471e998c0e("gpiolib: remove redundant callback check"), a warning will be printed if the gpio driver does not implement this callback. The warning was added in commite623c4303e("gpiolib: sanitize the return value of gpio_chip::get_direction()"), but was masked by the "redundant" check. The warning can be triggered by any action that calls the callback, such as dumping the GPIO state from /sys/kernel/debug/gpio. Implement it for the sunxi driver. This is simply a matter of reading out the mux value from the registers, then checking if it is one of the GPIO functions and which direction it is. Signed-off-by: Chen-Yu Tsai <wens@kernel.org> Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Linus Walleij <linusw@kernel.org>