[U-Boot] Generic stubs for GPIO LEDs

[Bernhard Nortmann <bernhard.nortmann@web.de>]

For boards that support LEDs driven via GPIO (CONFIG_GPIO_LED), it may 
be useful to have some generic stubs (wrapper functions) for the 
"colored" LEDs. This allows definitions like:

#define GREEN_LED_GPIO          248 /* = PH24 */

#define STATUS_LED_BIT          GREEN_LED_GPIO
#define STATUS_LED_STATE        STATUS_LED_OFF
#define STATUS_LED_PERIOD       (CONFIG_SYS_HZ / 2)

#define STATUS_LED_GREEN        GREEN_LED_GPIO

To keep this optional, it's probably best to introduce an additional 
configuration setting. I've chosen CONFIG_GPIO_LED_STUBS for that. 
Placing the code in drivers/misc/gpio_led.c also ensures that it 
automatically depends on CONFIG_GPIO_LED too.

Regards, B. Nortmann

---
  drivers/misc/gpio_led.c | 39 +++++++++++++++++++++++++++++++++++++++
  1 file changed, 39 insertions(+)

diff --git a/drivers/misc/gpio_led.c b/drivers/misc/gpio_led.c
index 3e95727..8f3bd9b 100644
--- a/drivers/misc/gpio_led.c
+++ b/drivers/misc/gpio_led.c
@@ -51,3 +51,42 @@ void __led_toggle(led_id_t mask)
  {
      gpio_set_value(mask, !gpio_get_value(mask));
  }
+
+#ifdef CONFIG_GPIO_LED_STUBS
+
+/* 'generic' override of colored LED stubs, to use GPIO functions 
instead */
+
+#ifdef STATUS_LED_RED
+void red_led_on(void) {
+        __led_set(STATUS_LED_RED, STATUS_LED_ON);
+}
+void red_led_off(void) {
+        __led_set(STATUS_LED_RED, STATUS_LED_OFF);
+}
+#endif
+#ifdef STATUS_LED_GREEN
+void green_led_on(void) {
+        __led_set(STATUS_LED_GREEN, STATUS_LED_ON);
+}
+void green_led_off(void) {
+        __led_set(STATUS_LED_GREEN, STATUS_LED_OFF);
+}
+#endif
+#ifdef STATUS_LED_YELLOW
+void yellow_led_on(void) {
+        __led_set(STATUS_LED_YELLOW, STATUS_LED_ON);
+}
+void yellow_led_off(void) {
+        __led_set(STATUS_LED_YELLOW, STATUS_LED_OFF);
+}
+#endif
+#ifdef STATUS_LED_BLUE
+void blue_led_on(void) {
+        __led_set(STATUS_LED_BLUE, STATUS_LED_ON);
+}
+void blue_led_off(void) {
+        __led_set(STATUS_LED_BLUE, STATUS_LED_OFF);
+}
+#endif
+
+#endif /* CONFIG_GPIO_LED_STUBS */
-- 
2.0.5