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leds: enable support for blink_set() platform hook in leds-gpio

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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: Herbert Valerio Riedel <hvr@gnu.org>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
This commit is contained in:
Herbert Valerio Riedel 2008-03-09 23:48:25 +00:00 committed by Richard Purdie
parent 4d404fd5c5
commit ca3259b360
2 changed files with 18 additions and 0 deletions
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15
drivers/leds/leds-gpio.c
View File

@ -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;

3
include/linux/leds.h
View File

@ -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);
};