1 /* 2 * Copyright (c) 2015 François Tigeot 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _LINUX_BACKLIGHT_H_ 28 #define _LINUX_BACKLIGHT_H_ 29 30 #include <linux/device.h> 31 #include <linux/fb.h> 32 #include <linux/mutex.h> 33 #include <linux/notifier.h> 34 35 enum backlight_type { 36 BACKLIGHT_RAW = 1, 37 BACKLIGHT_PLATFORM, 38 BACKLIGHT_FIRMWARE, 39 BACKLIGHT_TYPE_MAX, 40 }; 41 42 struct backlight_properties { 43 int brightness; 44 int max_brightness; 45 int power; 46 enum backlight_type type; 47 }; 48 49 struct backlight_device { 50 struct backlight_properties props; 51 }; 52 53 struct backlight_ops { 54 int (*update_status)(struct backlight_device *); 55 int (*get_brightness)(struct backlight_device *); 56 }; 57 58 #endif /* _LINUX_BACKLIGHT_H_ */ 59