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(parent: 32d064a) | patch
gpiolib: Fix gpio_direction_* for single direction GPIOs
authorRicardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Fri, 21 Sep 2018 10:36:03 +0000 (12:36 +0200)
committerLinus Walleij <linus.walleij@linaro.org>
Tue, 25 Sep 2018 07:34:48 +0000 (09:34 +0200)
commitae9847f48a4b4bff0335da20be63ac84d94eb54c
treead76987a49c41717745779be2be1b3eb9ae34870tree | snapshot
parent32d064a16eaace1866610f36fb5f4b114d979246commit | diff
gpiolib: Fix gpio_direction_* for single direction GPIOs

GPIOs with no programmable direction are not required to implement
direction_output nor direction_input.

If we try to set an output direction on an output-only GPIO or input
direction on an input-only GPIO simply return 0.

This allows this single direction GPIO to be used by libgpiod.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
drivers/gpio/gpiolib.c diff | blob | history
Domain: System / Kernel;