From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from 13.mo1.mail-out.ovh.net ([178.33.253.128] helo=mo1.mail-out.ovh.net) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TZSNq-0003Yn-D0 for barebox@lists.infradead.org; Fri, 16 Nov 2012 20:19:27 +0000 Received: from mail405.ha.ovh.net (b6.ovh.net [213.186.33.56]) by mo1.mail-out.ovh.net (Postfix) with SMTP id A8049FF9A93 for ; Fri, 16 Nov 2012 21:30:32 +0100 (CET) From: Jean-Christophe PLAGNIOL-VILLARD Date: Fri, 16 Nov 2012 21:17:23 +0100 Message-Id: <1353097043-31250-1-git-send-email-plagnioj@jcrosoft.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 1/1] led-gpio: add bicolor led support To: barebox@lists.infradead.org those led can have 2 colors but one at a time otherwise they are black Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- 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 barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox