post: add gpio hotkey support

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>

post: add gpio hotkey support
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>
Mike Frysinger · Wolfgang Denk
1 parent 7b826c2f35
Showing 1 changed file with 21 additions and 0 deletions Side-by-side Diff
post/post.c
@@ -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_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)
...	...	@@ -26,6 +26,10 @@
26	26	#include <watchdog.h>
27	27	#include <post.h>
28	28
	29	+#ifdef CONFIG_SYS_POST_HOTKEYS_GPIO
	30	+#include <asm/gpio.h>
	31	+#endif
	32	+
29	33	#ifdef CONFIG_LOGBUFFER
30	34	#include <logbuff.h>
31	35	#endif
...	...	@@ -68,6 +72,23 @@
68	72	*/
69	73	int __post_hotkeys_pressed(void)
70	74	{
	75	+#ifdef CONFIG_SYS_POST_HOTKEYS_GPIO
	76	+ int ret;
	77	+ unsigned gpio = CONFIG_SYS_POST_HOTKEYS_GPIO;
	78	+
	79	+ ret = gpio_request(gpio, "hotkeys");
	80	+ if (ret) {
	81	+ printf("POST: gpio hotkey request failed\n");
	82	+ return 0;
	83	+ }
	84	+
	85	+ gpio_direction_input(gpio);
	86	+ ret = gpio_get_value(gpio);
	87	+ gpio_free(gpio);
	88	+
	89	+ return ret;
	90	+#endif
	91	+
71	92	return 0; /* No hotkeys supported */
72	93	}
73	94	int post_hotkeys_pressed(void)