diff options
| author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2012-11-16 21:17:23 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2012-11-19 11:25:55 +0100 |
| commit | 06e641353e8304c033c05de95da64af5656b2ec2 (patch) | |
| tree | e9a1605055d51e7814435c7a200254b4852e927c | |
| parent | cc37eb4a4de76a5f5f26613b73e83edf56b8ef1f (diff) | |
| download | barebox-06e641353e8304c033c05de95da64af5656b2ec2.tar.gz barebox-06e641353e8304c033c05de95da64af5656b2ec2.tar.xz | |
led-gpio: add bicolor led support
those led can have 2 colors but one at a time otherwise they are black
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | drivers/led/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/led/led-gpio.c | 47 | ||||
| -rw-r--r-- | include/led.h | 20 |
3 files changed, 71 insertions, 0 deletions
diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig index 106093b722..8ca6ab8e44 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 711146b012..c78ef9e1cb 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 9ec1f0d37b..dd551fe161 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); |