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post: add gpio hotkey support

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Now that we have the generic GPIO layer, we can easily provide a common
implementation for the post_hotkeys_pressed() function based on it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2011-05-10 07:01:21 +00:00 • committed by Wolfgang Denk
parent 7b826c2f35
commit 9146d13821
1 changed files with 21 additions and 0 deletions
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21
post/post.c
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@ -26,6 +26,10 @@
#include <watchdog.h>
#include <post.h>
#ifdef CONFIG_SYS_POST_HOTKEYS_GPIO
#include <asm/gpio.h>
#endif
#ifdef CONFIG_LOGBUFFER
#include <logbuff.h>
#endif
@ -68,6 +72,23 @@ int post_init_f (void)
*/
int __post_hotkeys_pressed(void)
{
#ifdef CONFIG_SYS_POST_HOTKEYS_GPIO
int ret;
unsigned gpio = CONFIG_SYS_POST_HOTKEYS_GPIO;
ret = gpio_request(gpio, "hotkeys");
if (ret) {
printf("POST: gpio hotkey request failed\n");
return 0;
}
gpio_direction_input(gpio);
ret = gpio_get_value(gpio);
gpio_free(gpio);
return ret;
#endif
return 0; /* No hotkeys supported */
}
int post_hotkeys_pressed(void)