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gpio: Update Kconfig text for GPIO_SYSFS 

This feature is deprecated, it is helpful to inform users about
this. I'm resisting the temptation to add "depends on BROKEN"
to this, but saving that for later.

Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2019-05-23 08:54:19 +02:00
parent 663ba742d2
commit db9477f8b5
1 changed files with 5 additions and 9 deletions
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14
drivers/gpio/Kconfig
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@ -62,16 +62,12 @@ config GPIO_SYSFS
bool "/sys/class/gpio/... (sysfs interface)"
depends on SYSFS
help
Say Y here to add a sysfs interface for GPIOs.
Say Y here to add the legacy sysfs interface for GPIOs.
This is mostly useful to work around omissions in a system's
kernel support. Those are common in custom and semicustom
hardware assembled using standard kernels with a minimum of
custom patches. In those cases, userspace code may import
a given GPIO from the kernel, if no kernel driver requested it.
Kernel drivers may also request that a particular GPIO be
exported to userspace; this can be useful when debugging.
This ABI is deprecated. If you want to use GPIO from userspace,
use the character device /dev/gpiochipN with the appropriate
ioctl() operations instead. The character device is always
available.
config GPIO_GENERIC
depends on HAS_IOMEM # Only for IOMEM drivers