gpio: sysfs: Enforce character device

If users select sysfs support they get the character device
as well so that end-users cannot complain that they
"only have sysfs on my system". They should have the
character device at all times.

If someone is in so dire need of stripping out the
character device while still enabling the sysfs ABI they
can very well patch the kernel.

Also only show this obsolete option to expert users.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201110142724.14760-1-linus.walleij@linaro.org

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 5d4de5c..4dd566f 100644 (file)
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -59,8 +59,9 @@ config DEBUG_GPIO
          that are most common when setting up new platforms or boards.
 
 config GPIO_SYSFS
-       bool "/sys/class/gpio/... (sysfs interface)"
+       bool "/sys/class/gpio/... (sysfs interface)" if EXPERT
        depends on SYSFS
+       select GPIO_CDEV # We need to encourage the new ABI
        help
          Say Y here to add the legacy sysfs interface for GPIOs.