From 6c727e09a022fcc0701eef58c4a5aedae5d9a6ac Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Wed, 24 Dec 2014 19:34:38 +0100 Subject: sunxi: gpio: Add support for gpio pins on the AXP209 pmic 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 Acked-by: Ian Campbell --- drivers/gpio/sunxi_gpio.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'drivers/gpio/sunxi_gpio.c') diff --git a/drivers/gpio/sunxi_gpio.c b/drivers/gpio/sunxi_gpio.c index 2fa50f9..6296092 100644 --- a/drivers/gpio/sunxi_gpio.c +++ b/drivers/gpio/sunxi_gpio.c @@ -18,6 +18,9 @@ #include #include #include +#ifdef CONFIG_AXP209_POWER +#include +#endif DECLARE_GLOBAL_DATA_PTR; @@ -73,6 +76,10 @@ int gpio_free(unsigned gpio) int gpio_direction_input(unsigned gpio) { +#ifdef AXP_GPIO + if (gpio >= SUNXI_GPIO_AXP0_START) + return axp_gpio_direction_input(gpio - SUNXI_GPIO_AXP0_START); +#endif sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_INPUT); return 0; @@ -80,6 +87,11 @@ int gpio_direction_input(unsigned gpio) int gpio_direction_output(unsigned gpio, int value) { +#ifdef AXP_GPIO + if (gpio >= SUNXI_GPIO_AXP0_START) + return axp_gpio_direction_output(gpio - SUNXI_GPIO_AXP0_START, + value); +#endif sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_OUTPUT); return sunxi_gpio_output(gpio, value); @@ -87,11 +99,19 @@ int gpio_direction_output(unsigned gpio, int value) int gpio_get_value(unsigned gpio) { +#ifdef AXP_GPIO + if (gpio >= SUNXI_GPIO_AXP0_START) + return axp_gpio_get_value(gpio - SUNXI_GPIO_AXP0_START); +#endif return sunxi_gpio_input(gpio); } int gpio_set_value(unsigned gpio, int value) { +#ifdef AXP_GPIO + if (gpio >= SUNXI_GPIO_AXP0_START) + return axp_gpio_set_value(gpio - SUNXI_GPIO_AXP0_START, value); +#endif return sunxi_gpio_output(gpio, value); } @@ -101,6 +121,16 @@ int sunxi_name_to_gpio(const char *name) int groupsize = 9 * 32; long pin; char *eptr; + +#ifdef AXP_GPIO + if (strncasecmp(name, "AXP0-", 5) == 0) { + name += 5; + pin = simple_strtol(name, &eptr, 10); + if (!*name || *eptr) + return -1; + return SUNXI_GPIO_AXP0_START + pin; + } +#endif if (*name == 'P' || *name == 'p') name++; if (*name >= 'A') { -- cgit v1.1