video/backlight/lcd.c

30 	struct lcd_device *ld;
33 	ld = container_of(self, struct lcd_device, fb_notif);
34 	if (!ld->ops)
37 	mutex_lock(&ld->ops_lock);
38 	if (!ld->ops->check_fb || ld->ops->check_fb(ld, evdata->info)) {
40 			if (ld->ops->set_power)
41 				ld->ops->set_power(ld, *(int *)evdata->data);
43 			if (ld->ops->set_mode)
44 				ld->ops->set_mode(ld, evdata->data);
47 	mutex_unlock(&ld->ops_lock);
51 static int lcd_register_fb(struct lcd_device *ld)
53 	memset(&ld->fb_notif, 0, sizeof(ld->fb_notif));
54 	ld->fb_notif.notifier_call = fb_notifier_callback;
55 	return fb_register_client(&ld->fb_notif);
58 static void lcd_unregister_fb(struct lcd_device *ld)
60 	fb_unregister_client(&ld->fb_notif);
63 static int lcd_register_fb(struct lcd_device *ld)
68 static inline void lcd_unregister_fb(struct lcd_device *ld)
77 	struct lcd_device *ld = to_lcd_device(dev);
79 	mutex_lock(&ld->ops_lock);
80 	if (ld->ops && ld->ops->get_power)
81 		rc = sprintf(buf, "%d\n", ld->ops->get_power(ld));
84 	mutex_unlock(&ld->ops_lock);
93 	struct lcd_device *ld = to_lcd_device(dev);
102 	mutex_lock(&ld->ops_lock);
103 	if (ld->ops && ld->ops->set_power) {
105 		ld->ops->set_power(ld, power);
108 	mutex_unlock(&ld->ops_lock);
118 	struct lcd_device *ld = to_lcd_device(dev);
120 	mutex_lock(&ld->ops_lock);
121 	if (ld->ops && ld->ops->get_contrast)
122 		rc = sprintf(buf, "%d\n", ld->ops->get_contrast(ld));
123 	mutex_unlock(&ld->ops_lock);
132 	struct lcd_device *ld = to_lcd_device(dev);
141 	mutex_lock(&ld->ops_lock);
142 	if (ld->ops && ld->ops->set_contrast) {
144 		ld->ops->set_contrast(ld, contrast);
147 	mutex_unlock(&ld->ops_lock);
156 	struct lcd_device *ld = to_lcd_device(dev);
158 	return sprintf(buf, "%d\n", ld->props.max_contrast);
166 	struct lcd_device *ld = to_lcd_device(dev);
167 	kfree(ld);
184  *   methods may retrieve it by using lcd_get_data(ld).
231  * @ld: the lcd device object to be unregistered and freed.
235 void lcd_device_unregister(struct lcd_device *ld)
237 	if (!ld)
240 	mutex_lock(&ld->ops_lock);
241 	ld->ops = NULL;
242 	mutex_unlock(&ld->ops_lock);
243 	lcd_unregister_fb(ld);
245 	device_unregister(&ld->dev);
302  * @ld: the lcd device to unregister
308 void devm_lcd_device_unregister(struct device *dev, struct lcd_device *ld)
313 				devm_lcd_device_match, ld);
328 		pr_warn("Unable to create backlight class; errno = %ld\n",