drivers/leds/led-triggers.c

31 trigger_relevant(struct led_classdev *led_cdev, struct led_trigger *trig)
33 	return !trig->trigger_type || trig->trigger_type == led_cdev->trigger_type;
42 	struct led_trigger *trig;
58 	list_for_each_entry(trig, &trigger_list, next_trig) {
59 		if (sysfs_streq(buf, trig->name) && trigger_relevant(led_cdev, trig)) {
61 			led_trigger_set(led_cdev, trig);
97 	struct led_trigger *trig;
101 	list_for_each_entry(trig, &trigger_list, next_trig) {
104 		if (!trigger_relevant(led_cdev, trig))
107 		hit = led_cdev->trigger && !strcmp(led_cdev->trigger->name, trig->name);
111 					    trig->name, hit ? "]" : "");
158 int led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trig)
165 	if (!led_cdev->trigger && !trig)
168 	name = trig ? trig->name : "none";
191 	if (trig) {
192 		spin_lock(&trig->leddev_list_lock);
193 		list_add_tail_rcu(&led_cdev->trig_list, &trig->led_cdevs);
194 		spin_unlock(&trig->leddev_list_lock);
195 		led_cdev->trigger = trig;
197 		if (trig->activate)
198 			ret = trig->activate(led_cdev);
205 		ret = device_add_groups(led_cdev->dev, trig->groups);
225 	if (trig->deactivate)
226 		trig->deactivate(led_cdev);
251 				      struct led_trigger *trig)
253 	if (!strcmp(led_cdev->default_trigger, trig->name) &&
254 	    trigger_relevant(led_cdev, trig)) {
256 		led_trigger_set(led_cdev, trig);
265 	struct led_trigger *trig;
273 	list_for_each_entry(trig, &trigger_list, next_trig) {
274 		found = led_match_default_trigger(led_cdev, trig);
292 int led_trigger_register(struct led_trigger *trig)
297 	spin_lock_init(&trig->leddev_list_lock);
298 	INIT_LIST_HEAD(&trig->led_cdevs);
303 		if (!strcmp(_trig->name, trig->name) &&
304 		    (trig->trigger_type == _trig->trigger_type ||
305 		     !trig->trigger_type || !_trig->trigger_type)) {
311 	list_add_tail(&trig->next_trig, &trigger_list);
319 			led_match_default_trigger(led_cdev, trig);
328 void led_trigger_unregister(struct led_trigger *trig)
332 	if (list_empty_careful(&trig->next_trig))
337 	list_del_init(&trig->next_trig);
344 		if (led_cdev->trigger == trig)
358 			      struct led_trigger *trig)
368 	*dr = trig;
370 	rc = led_trigger_register(trig);
382 void led_trigger_event(struct led_trigger *trig,
387 	if (!trig)
391 	list_for_each_entry_rcu(led_cdev, &trig->led_cdevs, trig_list)
397 static void led_trigger_blink_setup(struct led_trigger *trig,
405 	if (!trig)
409 	list_for_each_entry_rcu(led_cdev, &trig->led_cdevs, trig_list) {
419 void led_trigger_blink(struct led_trigger *trig,
423 	led_trigger_blink_setup(trig, delay_on, delay_off, 0, 0);
427 void led_trigger_blink_oneshot(struct led_trigger *trig,
432 	led_trigger_blink_setup(trig, delay_on, delay_off, 1, invert);
438 	struct led_trigger *trig;
441 	trig = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
443 	if (trig) {
444 		trig->name = name;
445 		err = led_trigger_register(trig);
447 			kfree(trig);
448 			trig = NULL;
456 	*tp = trig;
460 void led_trigger_unregister_simple(struct led_trigger *trig)
462 	if (trig)
463 		led_trigger_unregister(trig);
464 	kfree(trig);