[U-Boot] [PATCH v2] sunxi: gpio: Add support for gpio pins on the AXP209 pmic

[Ian Campbell]

On Sun, 2014-12-28 at 11:35 +0100, Hans de Goede wrote:
> Some boards use GPIO-s on the pmic, one example of this is the A13-OLinuXino
> board, which uses gpio0 of the axp209 for the lcd-power signal.
> 
> This commit adds support for gpio pins on the AXP209 pmic, the sunxi_gpio.c
> changes are universal, adding gpio support for the other AXP pmics (when
> necessary) should be a matter of adding the necessary axp_gpio_foo functions
> to their resp. drivers, and add "#define AXP_GPIO" to their header file.
> 
> Note this commit only adds support for the non device-model version of the
> gpio code, patches for adding support to the device-model version are very
> welcome.
> 
> The string representation for these gpio-s is AXP0-#, the 0 in the AXP0 prefix
> is there in case we need to support gpio-s on more then 1 pmic in the future.
> At least A80 boards have 2 pmics, and we may end up needing to support gpio-s
> on both.
> 
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>

Acked-by: Ian Campbell <ijc at hellion.org.uk>