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| author | Hans de Goede <hdegoede@redhat.com> | 2014-12-24 19:34:38 +0100 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2015-01-14 14:56:38 +0100 |
| commit | 6c727e09a022fcc0701eef58c4a5aedae5d9a6ac (patch) | |
| tree | b03dcd3a57abfd69fa7747c24ac91ff706cf7d33 /drivers/gpio | |
| parent | d27f7d14eaa1299b93c1e5efb691ddf0884885fa (diff) | |
| download | u-boot-imx-6c727e09a022fcc0701eef58c4a5aedae5d9a6ac.zip u-boot-imx-6c727e09a022fcc0701eef58c4a5aedae5d9a6ac.tar.gz u-boot-imx-6c727e09a022fcc0701eef58c4a5aedae5d9a6ac.tar.bz2 | |
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 <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/sunxi_gpio.c | 30 |
1 files changed, 30 insertions, 0 deletions
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 <asm/io.h> #include <asm/gpio.h> #include <dm/device-internal.h> +#ifdef CONFIG_AXP209_POWER +#include <axp209.h> +#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') { |