drivers/leds/led-class.c

31 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
34 	led_update_brightness(led_cdev);
36 	return sprintf(buf, "%u\n", led_cdev->brightness);
42 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
46 	mutex_lock(&led_cdev->led_access);
48 	if (led_sysfs_is_disabled(led_cdev)) {
58 		led_trigger_remove(led_cdev);
59 	led_set_brightness(led_cdev, state);
60 	flush_work(&led_cdev->set_brightness_work);
64 	mutex_unlock(&led_cdev->led_access);
72 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
74 	return sprintf(buf, "%u\n", led_cdev->max_brightness);
111 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
113 	if (led_cdev->brightness_hw_changed == -1)
116 	return sprintf(buf, "%u\n", led_cdev->brightness_hw_changed);
121 static int led_add_brightness_hw_changed(struct led_classdev *led_cdev)
123 	struct device *dev = led_cdev->dev;
132 	led_cdev->brightness_hw_changed_kn =
134 	if (!led_cdev->brightness_hw_changed_kn) {
143 static void led_remove_brightness_hw_changed(struct led_classdev *led_cdev)
145 	sysfs_put(led_cdev->brightness_hw_changed_kn);
146 	device_remove_file(led_cdev->dev, &dev_attr_brightness_hw_changed);
149 void led_classdev_notify_brightness_hw_changed(struct led_classdev *led_cdev, unsigned int brightness)
151 	if (WARN_ON(!led_cdev->brightness_hw_changed_kn))
154 	led_cdev->brightness_hw_changed = brightness;
155 	sysfs_notify_dirent(led_cdev->brightness_hw_changed_kn);
159 static int led_add_brightness_hw_changed(struct led_classdev *led_cdev)
163 static void led_remove_brightness_hw_changed(struct led_classdev *led_cdev)
170  * @led_cdev: the led_classdev to suspend.
172 void led_classdev_suspend(struct led_classdev *led_cdev)
174 	led_cdev->flags |= LED_SUSPENDED;
175 	led_set_brightness_nopm(led_cdev, 0);
176 	flush_work(&led_cdev->set_brightness_work);
182  * @led_cdev: the led_classdev to resume.
184 void led_classdev_resume(struct led_classdev *led_cdev)
186 	led_set_brightness_nopm(led_cdev, led_cdev->brightness);
188 	if (led_cdev->flash_resume)
189 		led_cdev->flash_resume(led_cdev);
191 	led_cdev->flags &= ~LED_SUSPENDED;
198 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
200 	if (led_cdev->flags & LED_CORE_SUSPENDRESUME)
201 		led_classdev_suspend(led_cdev);
208 	struct led_classdev *led_cdev = dev_get_drvdata(dev);
210 	if (led_cdev->flags & LED_CORE_SUSPENDRESUME)
211 		led_classdev_resume(led_cdev);
221 	struct led_classdev *led_cdev;
226 	led_cdev = dev_get_drvdata(led_dev);
228 	if (!try_module_get(led_cdev->dev->parent->driver->owner)) {
229 		put_device(led_cdev->dev);
233 	return led_cdev;
269  * @led_cdev: LED device
271 void led_put(struct led_classdev *led_cdev)
273 	module_put(led_cdev->dev->parent->driver->owner);
274 	put_device(led_cdev->dev);
461  * @led_cdev: the led_classdev structure for this device.
465 			      struct led_classdev *led_cdev,
485 				&led_cdev->default_trigger);
489 				led_cdev->flags |= LED_RETAIN_AT_SHUTDOWN;
493 				&led_cdev->max_brightness);
497 							 &led_cdev->color);
500 		proposed_name = led_cdev->name;
507 	if (led_cdev->color >= LED_COLOR_ID_MAX)
510 	mutex_init(&led_cdev->led_access);
511 	mutex_lock(&led_cdev->led_access);
512 	led_cdev->dev = device_create_with_groups(&leds_class, parent, 0,
513 						  led_cdev, led_cdev->groups, "%s", final_name);
514 	if (IS_ERR(led_cdev->dev)) {
515 		mutex_unlock(&led_cdev->led_access);
516 		return PTR_ERR(led_cdev->dev);
519 		device_set_node(led_cdev->dev, init_data->fwnode);
523 				proposed_name, dev_name(led_cdev->dev));
525 	if (led_cdev->flags & LED_BRIGHT_HW_CHANGED) {
526 		ret = led_add_brightness_hw_changed(led_cdev);
528 			device_unregister(led_cdev->dev);
529 			led_cdev->dev = NULL;
530 			mutex_unlock(&led_cdev->led_access);
535 	led_cdev->work_flags = 0;
537 	init_rwsem(&led_cdev->trigger_lock);
540 	led_cdev->brightness_hw_changed = -1;
544 	list_add_tail(&led_cdev->node, &leds_list);
547 	if (!led_cdev->max_brightness)
548 		led_cdev->max_brightness = LED_FULL;
550 	led_update_brightness(led_cdev);
552 	led_init_core(led_cdev);
559 	if (!led_cdev->default_trigger && led_cdev->hw_control_trigger)
560 		led_cdev->default_trigger = led_cdev->hw_control_trigger;
561 	led_trigger_set_default(led_cdev);
564 	mutex_unlock(&led_cdev->led_access);
567 			led_cdev->name);
575  * @led_cdev: the led device to unregister
579 void led_classdev_unregister(struct led_classdev *led_cdev)
581 	if (IS_ERR_OR_NULL(led_cdev->dev))
585 	down_write(&led_cdev->trigger_lock);
586 	if (led_cdev->trigger)
587 		led_trigger_set(led_cdev, NULL);
588 	up_write(&led_cdev->trigger_lock);
591 	led_cdev->flags |= LED_UNREGISTERING;
594 	led_stop_software_blink(led_cdev);
596 	if (!(led_cdev->flags & LED_RETAIN_AT_SHUTDOWN))
597 		led_set_brightness(led_cdev, LED_OFF);
599 	flush_work(&led_cdev->set_brightness_work);
601 	if (led_cdev->flags & LED_BRIGHT_HW_CHANGED)
602 		led_remove_brightness_hw_changed(led_cdev);
604 	device_unregister(led_cdev->dev);
607 	list_del(&led_cdev->node);
610 	mutex_destroy(&led_cdev->led_access);
623  * @led_cdev: the led_classdev structure for this device.
627 				   struct led_classdev *led_cdev,
637 	rc = led_classdev_register_ext(parent, led_cdev, init_data);
643 	*dr = led_cdev;
663  * @led_cdev: the led_classdev structure for this device.
666 				  struct led_classdev *led_cdev)
670 			       devm_led_classdev_match, led_cdev));