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83d290c5 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
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2 | /* |
3 | * Copyright (c) 2016 Google, Inc | |
4 | * Written by Simon Glass <[email protected]> | |
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5 | */ |
6 | ||
7 | #ifndef _BACKLIGHT_H | |
8 | #define _BACKLIGHT_H | |
9 | ||
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10 | enum { |
11 | BACKLIGHT_MAX = 100, | |
12 | BACKLIGHT_MIN = 0, | |
13 | BACKLIGHT_OFF = -1, | |
14 | BACKLIGHT_DEFAULT = -2, | |
15 | }; | |
16 | ||
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17 | struct backlight_ops { |
18 | /** | |
19 | * enable() - Enable a backlight | |
20 | * | |
21 | * @dev: Backlight device to enable | |
22 | * @return 0 if OK, -ve on error | |
23 | */ | |
24 | int (*enable)(struct udevice *dev); | |
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25 | |
26 | /** | |
27 | * set_brightness - Set brightness | |
28 | * | |
29 | * @dev: Backlight device to update | |
30 | * @percent: Brightness value (0 to 100, or BACKLIGHT_... value) | |
31 | * @return 0 if OK, -ve on error | |
32 | */ | |
33 | int (*set_brightness)(struct udevice *dev, int percent); | |
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34 | }; |
35 | ||
36 | #define backlight_get_ops(dev) ((struct backlight_ops *)(dev)->driver->ops) | |
37 | ||
38 | /** | |
39 | * backlight_enable() - Enable a backlight | |
40 | * | |
41 | * @dev: Backlight device to enable | |
42 | * @return 0 if OK, -ve on error | |
43 | */ | |
44 | int backlight_enable(struct udevice *dev); | |
45 | ||
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46 | /** |
47 | * backlight_set_brightness - Set brightness | |
48 | * | |
49 | * @dev: Backlight device to update | |
50 | * @percent: Brightness value (0 to 100, or BACKLIGHT_... value) | |
51 | * @return 0 if OK, -ve on error | |
52 | */ | |
53 | int backlight_set_brightness(struct udevice *dev, int percent); | |
54 | ||
363bf77a | 55 | #endif |