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| author | Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> | 2013-07-02 20:30:47 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-07-09 20:00:19 +0200 |
| commit | 34934c183b2880340c9ee8f7f36da5a77bffea46 (patch) | |
| tree | a44d302e6896f6224698892e9db80e2073e72bee /drivers/led | |
| parent | cf31688b6a6981bf6e66ec8587d0ccf3dd72a594 (diff) | |
| download | barebox-34934c183b2880340c9ee8f7f36da5a77bffea46.tar.gz barebox-34934c183b2880340c9ee8f7f36da5a77bffea46.tar.xz | |
LED: add support for device tree parsing of gpio-leds
This adds a driver option to probe GPIO LEDs from device tree compatible
with "gpio-leds" device tree nodes.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/led')
| -rw-r--r-- | drivers/led/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/led/led-gpio.c | 45 |
2 files changed, 49 insertions, 0 deletions
diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig index 8ca6ab8e44..3ead82e031 100644 --- a/drivers/led/Kconfig +++ b/drivers/led/Kconfig @@ -7,6 +7,10 @@ config LED_GPIO bool "gpio LED support" depends on GENERIC_GPIO +config LED_GPIO_OF + bool "support parsing gpio LEDs from device tree" + depends on LED_GPIO && OFTREE + config LED_GPIO_RGB bool "gpio rgb LED support" depends on LED_GPIO diff --git a/drivers/led/led-gpio.c b/drivers/led/led-gpio.c index 08dc9bad0d..54f9264d44 100644 --- a/drivers/led/led-gpio.c +++ b/drivers/led/led-gpio.c @@ -18,8 +18,10 @@ * */ #include <common.h> +#include <init.h> #include <led.h> #include <gpio.h> +#include <of_gpio.h> static void led_gpio_set(struct led *led, unsigned int value) { @@ -194,3 +196,46 @@ void led_gpio_rgb_unregister(struct gpio_led *led) led_unregister(&led->led); } #endif /* CONFIG_LED_GPIO_RGB */ + +#ifdef CONFIG_LED_GPIO_OF + +static int led_gpio_of_probe(struct device_d *dev) +{ + struct device_node *child; + + for_each_child_of_node(dev->device_node, child) { + struct gpio_led *gled; + enum of_gpio_flags flags; + int gpio; + + gpio = of_get_named_gpio_flags(child, "gpios", 0, &flags); + if (gpio < 0) + continue; + + gled = xzalloc(sizeof(*gled)); + gled->led.name = xstrdup(child->name); + gled->gpio = gpio; + gled->active_low = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0; + + dev_dbg(dev, "register led %s on gpio%d, active_low = %d\n", + gled->led.name, gled->gpio, gled->active_low); + + led_gpio_register(gled); + } + + return 0; +} + +static struct of_device_id led_gpio_of_ids[] = { + { .compatible = "gpio-leds", }, + { } +}; + +static struct driver_d led_gpio_of_driver = { + .name = "gpio-leds", + .probe = led_gpio_of_probe, + .of_compatible = DRV_OF_COMPAT(led_gpio_of_ids), +}; +device_platform_driver(led_gpio_of_driver); + +#endif /* CONFIG LED_GPIO_OF */ |