1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2003,2004 Hewlett-Packard Company
24 			     int power)  in lcd_notify_blank()  argument
26 	guard(mutex)(&ld->ops_lock);  in lcd_notify_blank()
28 	if (!ld->ops || !ld->ops->set_power)  in lcd_notify_blank()
30 	if (ld->ops->controls_device && !ld->ops->controls_device(ld, display_dev))  in lcd_notify_blank()
33 	ld->ops->set_power(ld, power);  in lcd_notify_blank()
36 void lcd_notify_blank_all(struct device *display_dev, int power)  in lcd_notify_blank_all()  argument
43 		lcd_notify_blank(ld, display_dev, power);  in lcd_notify_blank_all()
50 	guard(mutex)(&ld->ops_lock);  in lcd_notify_mode_change()
52 	if (!ld->ops || !ld->ops->set_mode)  in lcd_notify_mode_change()
54 	if (ld->ops->controls_device && !ld->ops->controls_device(ld, display_dev))  in lcd_notify_mode_change()
57 	ld->ops->set_mode(ld, width, height);  in lcd_notify_mode_change()
78 	mutex_lock(&ld->ops_lock);  in lcd_power_show()
79 	if (ld->ops && ld->ops->get_power)  in lcd_power_show()
80 		rc = sprintf(buf, "%d\n", ld->ops->get_power(ld));  in lcd_power_show()
82 		rc = -ENXIO;  in lcd_power_show()
83 	mutex_unlock(&ld->ops_lock);  in lcd_power_show()
93 	unsigned long power;  in lcd_power_store()  local
95 	rc = kstrtoul(buf, 0, &power);  in lcd_power_store()
99 	rc = -ENXIO;  in lcd_power_store()
101 	mutex_lock(&ld->ops_lock);  in lcd_power_store()
102 	if (ld->ops && ld->ops->set_power) {  in lcd_power_store()
103 		pr_debug("set power to %lu\n", power);  in lcd_power_store()
104 		ld->ops->set_power(ld, power);  in lcd_power_store()
107 	mutex_unlock(&ld->ops_lock);  in lcd_power_store()
116 	int rc = -ENXIO;  in contrast_show()
119 	mutex_lock(&ld->ops_lock);  in contrast_show()
120 	if (ld->ops && ld->ops->get_contrast)  in contrast_show()
121 		rc = sprintf(buf, "%d\n", ld->ops->get_contrast(ld));  in contrast_show()
122 	mutex_unlock(&ld->ops_lock);  in contrast_show()
138 	rc = -ENXIO;  in contrast_store()
140 	mutex_lock(&ld->ops_lock);  in contrast_store()
141 	if (ld->ops && ld->ops->set_contrast) {  in contrast_store()
143 		ld->ops->set_contrast(ld, contrast);  in contrast_store()
146 	mutex_unlock(&ld->ops_lock);  in contrast_store()
157 	return sprintf(buf, "%d\n", ld->props.max_contrast);  in max_contrast_show()
181  * lcd_device_register - register a new object of lcd_device class.
202 		return ERR_PTR(-ENOMEM);  in lcd_device_register()
204 	mutex_init(&new_ld->ops_lock);  in lcd_device_register()
205 	mutex_init(&new_ld->update_lock);  in lcd_device_register()
207 	new_ld->dev.class = &lcd_class;  in lcd_device_register()
208 	new_ld->dev.parent = parent;  in lcd_device_register()
209 	new_ld->dev.release = lcd_device_release;  in lcd_device_register()
210 	dev_set_name(&new_ld->dev, "%s", name);  in lcd_device_register()
211 	dev_set_drvdata(&new_ld->dev, devdata);  in lcd_device_register()
213 	new_ld->ops = ops;  in lcd_device_register()
215 	rc = device_register(&new_ld->dev);  in lcd_device_register()
217 		put_device(&new_ld->dev);  in lcd_device_register()
222 	list_add(&new_ld->entry, &lcd_dev_list);  in lcd_device_register()
229  * lcd_device_unregister - unregisters a object of lcd_device class.
240 	list_del(&ld->entry);  in lcd_device_unregister()
242 	mutex_lock(&ld->ops_lock);  in lcd_device_unregister()
243 	ld->ops = NULL;  in lcd_device_unregister()
244 	mutex_unlock(&ld->ops_lock);  in lcd_device_unregister()
246 	device_unregister(&ld->dev);  in lcd_device_unregister()
265  * devm_lcd_device_register - resource managed lcd_device_register()
274  * Managed lcd_device_register(). The lcd_device returned from this function
286 		return ERR_PTR(-ENOMEM);  in devm_lcd_device_register()
301  * devm_lcd_device_unregister - resource managed lcd_device_unregister()