Allow initialization of delays used in timer trigger from Device Tree property.
This is especially useful for embedded systems where the trigger might be used early, before bringing up user-space. Signed-off-by: Krzysztof Kozlowski <[email protected]> --- New patch in the series --- drivers/leds/trigger/ledtrig-timer.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/leds/trigger/ledtrig-timer.c b/drivers/leds/trigger/ledtrig-timer.c index 7c14983781ee..85a4b9fc3de0 100644 --- a/drivers/leds/trigger/ledtrig-timer.c +++ b/drivers/leds/trigger/ledtrig-timer.c @@ -77,8 +77,36 @@ static struct attribute *timer_trig_attrs[] = { }; ATTRIBUTE_GROUPS(timer_trig); +static void pattern_init(struct led_classdev *led_cdev) +{ + const char *pattern; + unsigned long delay_on, delay_off; + + pattern = led_classdev_get_default_pattern(led_cdev); + if (!pattern) + return; + + if (sscanf(pattern, "%lu %lu", &delay_on, &delay_off) == 2) { + led_blink_set(led_cdev, &delay_on, &delay_off); + led_cdev->blink_delay_on = delay_on; + led_cdev->blink_delay_off = delay_off; + } else { + dev_warn(led_cdev->dev, + "Invalid value for delays pattern\n"); + } +} + static int timer_trig_activate(struct led_classdev *led_cdev) { + if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) { + pattern_init(led_cdev); + /* + * Mark as initialized even on pattern_init() error because + * any consecutive call to it would produce the same error. + */ + led_cdev->flags &= ~LED_INIT_DEFAULT_TRIGGER; + } + led_blink_set(led_cdev, &led_cdev->blink_delay_on, &led_cdev->blink_delay_off); -- 2.7.4
