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sunxi: gpio: Add support for gpio pins on the AXP209 pmic

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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@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
This commit is contained in:
Hans de Goede
2014-12-24 19:34:38 +01:00
parent d27f7d14ea
commit 6c727e09a0
4 changed files with 112 additions and 0 deletions
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3
arch/arm/include/asm/arch-sunxi/gpio.h
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@@ -114,6 +114,7 @@ enum sunxi_gpio_number {
SUNXI_GPIO_I_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_H),
SUNXI_GPIO_L_START = 352,
SUNXI_GPIO_M_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_L),
SUNXI_GPIO_AXP0_START = 1024,
};
/* SUNXI GPIO number definitions */
@@ -129,6 +130,8 @@ enum sunxi_gpio_number {
#define SUNXI_GPL(_nr) (SUNXI_GPIO_L_START + (_nr))
#define SUNXI_GPM(_nr) (SUNXI_GPIO_M_START + (_nr))
#define SUNXI_GPAXP0(_nr) (SUNXI_GPIO_AXP0_START + (_nr))
/* GPIO pin function config */
#define SUNXI_GPIO_INPUT 0
#define SUNXI_GPIO_OUTPUT 1