projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 363bf77a SG |
2 | /* |
| 3 | * Copyright (c) 2016 Google, Inc | |
| 4 | * Written by Simon Glass <[email protected]> | |
| 363bf77a SG |
5 | */ |
| 6 | ||
| 7 | #ifndef _BACKLIGHT_H | |
| 8 | #define _BACKLIGHT_H | |
| 9 | ||
| 401d1c4f SG |
10 | struct udevice; |
| 11 | ||
| a4f737a9 SG |
12 | enum { |
| 13 | BACKLIGHT_MAX = 100, | |
| 14 | BACKLIGHT_MIN = 0, | |
| 15 | BACKLIGHT_OFF = -1, | |
| 16 | BACKLIGHT_DEFAULT = -2, | |
| 17 | }; | |
| 18 | ||
| 363bf77a SG |
19 | struct backlight_ops { |
| 20 | /** | |
| 21 | * enable() - Enable a backlight | |
| 22 | * | |
| 23 | * @dev: Backlight device to enable | |
| 24 | * @return 0 if OK, -ve on error | |
| 25 | */ | |
| 26 | int (*enable)(struct udevice *dev); | |
| a4f737a9 SG |
27 | |
| 28 | /** | |
| 29 | * set_brightness - Set brightness | |
| 30 | * | |
| 31 | * @dev: Backlight device to update | |
| 32 | * @percent: Brightness value (0 to 100, or BACKLIGHT_... value) | |
| 33 | * @return 0 if OK, -ve on error | |
| 34 | */ | |
| 35 | int (*set_brightness)(struct udevice *dev, int percent); | |
| 363bf77a SG |
36 | }; |
| 37 | ||
| 38 | #define backlight_get_ops(dev) ((struct backlight_ops *)(dev)->driver->ops) | |
| 39 | ||
| 40 | /** | |
| 41 | * backlight_enable() - Enable a backlight | |
| 42 | * | |
| 43 | * @dev: Backlight device to enable | |
| 44 | * @return 0 if OK, -ve on error | |
| 45 | */ | |
| 46 | int backlight_enable(struct udevice *dev); | |
| 47 | ||
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48 | /** |
| 49 | * backlight_set_brightness - Set brightness | |
| 50 | * | |
| 51 | * @dev: Backlight device to update | |
| 52 | * @percent: Brightness value (0 to 100, or BACKLIGHT_... value) | |
| 53 | * @return 0 if OK, -ve on error | |
| 54 | */ | |
| 55 | int backlight_set_brightness(struct udevice *dev, int percent); | |
| 56 | ||
| 363bf77a | 57 | #endif |