those led can have 2 colors but one at a time otherwise they are black
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
---
drivers/led/Kconfig | 4 ++++
drivers/led/led-gpio.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
include/led.h | 20 ++++++++++++++++++++
3 files changed, 71 insertions(+)
diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig
index 106093b..8ca6ab8 100644
--- a/drivers/led/Kconfig
+++ b/drivers/led/Kconfig
@@ -11,6 +11,10 @@ config LED_GPIO_RGB
bool "gpio rgb LED support"
depends on LED_GPIO
+config LED_GPIO_BICOLOR
+ bool "gpio bicolor LED support"
+ depends on LED_GPIO
+
config LED_TRIGGERS
select POLLER
bool "LED triggers support"
diff --git a/drivers/led/led-gpio.c b/drivers/led/led-gpio.c
index 711146b..c78ef9e 100644
--- a/drivers/led/led-gpio.c
+++ b/drivers/led/led-gpio.c
@@ -52,6 +52,53 @@ void led_gpio_unregister(struct gpio_led *led)
led_unregister(&led->led);
}
+#ifdef CONFIG_LED_GPIO_BICOLOR
+static void led_gpio_bicolor_set(struct led *led, unsigned int value)
+{
+ struct gpio_bicolor_led *bi = container_of(led, struct
gpio_bicolor_led, led);
+ int al = bi->active_low;
+
+ switch (value) {
+ case 0:
+ gpio_direction_output(bi->gpio_c0, al);
+ gpio_direction_output(bi->gpio_c1, al);
+ break;
+ case 1:
+ gpio_direction_output(bi->gpio_c0, !al);
+ gpio_direction_output(bi->gpio_c1, al);
+ break;
+ case 2:
+ gpio_direction_output(bi->gpio_c0, al);
+ gpio_direction_output(bi->gpio_c1, !al);
+ break;
+ }
+}
+
+/**
+ * led_gpio_bicolor_register - register three gpios as a bicolor LED
+ * @param led The gpio bicolor LED
+ *
+ * This function registers three gpios as a bicolor LED. led->gpio[rg]
+ * should be initialized to the gpios to control.
+ */
+int led_gpio_bicolor_register(struct gpio_bicolor_led *led)
+{
+ led->led.set = led_gpio_bicolor_set;
+ led->led.max_value = 2;
+
+ return led_register(&led->led);
+}
+
+/**
+ * led_gpio_bicolor_unregister - remove a gpio controlled bicolor LED from the
framework
+ * @param led The gpio LED
+ */
+void led_gpio_bicolor_unregister(struct gpio_bicolor_led *led)
+{
+ led_unregister(&led->led);
+}
+#endif
+
#ifdef CONFIG_LED_GPIO_RGB
static void led_gpio_rgb_set(struct led *led, unsigned int value)
diff --git a/include/led.h b/include/led.h
index 9ec1f0d..dd551fe 100644
--- a/include/led.h
+++ b/include/led.h
@@ -65,6 +65,12 @@ struct gpio_led {
struct led led;
};
+struct gpio_bicolor_led {
+ int gpio_c0, gpio_c1;
+ bool active_low;
+ struct led led;
+};
+
struct gpio_rgb_led {
int gpio_r, gpio_g, gpio_b;
bool active_low;
@@ -85,6 +91,20 @@ static inline void led_gpio_unregister(struct gpio_led *led)
}
#endif
+#ifdef CONFIG_LED_GPIO_BICOLOR
+int led_gpio_bicolor_register(struct gpio_bicolor_led *led);
+void led_gpio_bicolor_unregister(struct gpio_bicolor_led *led);
+#else
+static inline int led_gpio_bicolor_register(struct gpio_bicolor_led *led)
+{
+ return -ENOSYS;
+}
+
+static inline void led_gpio_bicolor_unregister(struct gpio_bicolor_led *led)
+{
+}
+#endif
+
#ifdef CONFIG_LED_GPIO_RGB
int led_gpio_rgb_register(struct gpio_rgb_led *led);
void led_gpio_rgb_unregister(struct gpio_led *led);
--
1.7.10.4
_______________________________________________
barebox mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/barebox
