gpio: document gpio irqchips a bit more, describe helpers
authorLinus Walleij <linus.walleij@linaro.org>
Wed, 9 Apr 2014 12:36:32 +0000 (14:36 +0200)
committerLinus Walleij <linus.walleij@linaro.org>
Mon, 28 Apr 2014 19:35:07 +0000 (12:35 -0700)
This adds some documentation about the GPIO irqchips, what types
exist etc.

Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Documentation/gpio/driver.txt

Simple merge