Input: gpio-keys: Support getting descriptors from board
There are any number of board files in the kernel providing
keys/pushbuttons/switches using simple GPIO. In order to
transfer these smoothly to use GPIO descriptors with
descriptor tables in the board files and no static GPIO
numbers, we need to accept that the board files provide
named GPIOs associated with the GPIO chip device.
Luckily gpio_keys of both polled and interrupt-enabled
type will optionally pass a "desc" field which we can use
as the name of the GPIO to look up and request a GPIO
line for a certain key defined in a per-board descriptor
lookup table.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2 files changed
