include/linux/lcd.h

1 /* SPDX-License-Identifier: GPL-2.0 */
5  * Copyright (C) 2003,2004 Hewlett-Packard Company
17 /* Notes on locking:
19  * lcd_device->ops_lock is an internal backlight lock protecting the ops
20  * field and no code outside the core should need to touch it.
25  * Most drivers don't need locking on their get_power() method.
36 	/* The maximum value for contrast (read-only) */
41 	/* Get the LCD panel power status (0: full on, 1..3: controller
42 	   power on, flat panel power off, 4: full off), see FB_BLANK_XXX */
44 	/* Enable or disable power to the LCD (0: on; 4: off, see FB_BLANK_XXX) */
45 	int (*set_power)(struct lcd_device *, int power);
46 	/* Get the current contrast setting (0-max_contrast) */
74 	/* reset lcd panel device. */
75 	int (*reset)(struct lcd_device *ld);  member
76 	/* on or off to lcd panel. if 'enable' is 0 then
77 	   lcd power off and 1, lcd power on. */
84 	   or high to low that is dependent on whether reset gpio is
87 	/* stable time needing to become lcd power on. */
89 	/* stable time needing to become lcd power off. */
96 static inline void lcd_set_power(struct lcd_device *ld, int power)  in lcd_set_power()  argument
98 	mutex_lock(&ld->update_lock);  in lcd_set_power()
99 	if (ld->ops && ld->ops->set_power)  in lcd_set_power()
100 		ld->ops->set_power(ld, power);  in lcd_set_power()
101 	mutex_unlock(&ld->update_lock);  in lcd_set_power()
117 	return dev_get_drvdata(&ld_dev->dev);  in lcd_get_data()