The GPIO input status was read from control register
(AXP20X_GPIO[210]_CTRL) instead of status register (AXP20X_GPIO20_SS).
Signed-off-by: NQuentin Schulz <quentin.schulz@free-electrons.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Implement the get_direction callback for the GPIOs found in the AXP209
PMIC.

Due to the way they are implemented, in the same register you have the
muxing options, GPIO directions and GPIO values. Since you have no control
over what value is there at reset, simply use output as the default.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The AXP209 PMIC has a bunch of GPIOs accessible, that are usually used to
control LEDs or backlight.

Add a driver for them
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>