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Commit ca3259b3 authored by Herbert Valerio Riedel's avatar Herbert Valerio Riedel Committed by Richard Purdie
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leds: enable support for blink_set() platform hook in leds-gpio 



Enhance leds-gpio to provide hardware-based led flashing by passing
through the blink_set() call to a optionally set platform-specific
function pointer.

Signed-off-by: default avatarHerbert Valerio Riedel <hvr@gnu.org>
Signed-off-by: default avatarRichard Purdie <rpurdie@rpsys.net>
parent 4d404fd5

drivers/leds/leds-gpio.c

+15 −0
Original line number Diff line number Diff line
@@ -24,6 +24,8 @@ struct gpio_led_data { 
	u8 new_level;

	u8 can_sleep;

	u8 active_low;

	int (*platform_gpio_blink_set)(unsigned gpio,

			unsigned long *delay_on, unsigned long *delay_off);

};



static void gpio_led_work(struct work_struct *work)
@@ -60,6 +62,15 @@ static void gpio_led_set(struct led_classdev *led_cdev, 
		gpio_set_value(led_dat->gpio, level);

}



static int gpio_blink_set(struct led_classdev *led_cdev,

	unsigned long *delay_on, unsigned long *delay_off)

{

	struct gpio_led_data *led_dat =

		container_of(led_cdev, struct gpio_led_data, cdev);



	return led_dat->platform_gpio_blink_set(led_dat->gpio, delay_on, delay_off);

}



static int gpio_led_probe(struct platform_device *pdev)

{

	struct gpio_led_platform_data *pdata = pdev->dev.platform_data;
@@ -88,6 +99,10 @@ static int gpio_led_probe(struct platform_device *pdev) 
		led_dat->gpio = cur_led->gpio;

		led_dat->can_sleep = gpio_cansleep(cur_led->gpio);

		led_dat->active_low = cur_led->active_low;

		if (pdata->gpio_blink_set) {

			led_dat->platform_gpio_blink_set = pdata->gpio_blink_set;

			led_dat->cdev.blink_set = gpio_blink_set;

		}

		led_dat->cdev.brightness_set = gpio_led_set;

		led_dat->cdev.brightness = LED_OFF;

include/linux/leds.h

+3 −0
Original line number Diff line number Diff line
@@ -126,6 +126,9 @@ struct gpio_led { 
struct gpio_led_platform_data {

	int 		num_leds;

	struct gpio_led *leds;

	int		(*gpio_blink_set)(unsigned gpio,

					unsigned long *delay_on,

					unsigned long *delay_off);

};