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author | Iru Cai <mytbk920423@gmail.com> | 2019-10-30 14:21:52 +0800 |
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committer | Iru Cai <mytbk920423@gmail.com> | 2019-10-30 14:48:38 +0800 |
commit | ae51f41d14f548d494ac41e0d21137c5a4c3f59c (patch) | |
tree | 6ddb9d1aaa7bd5bad5bbf8497edc2e08ff208d79 /include/backlight.h | |
download | uext4-ae51f41d14f548d494ac41e0d21137c5a4c3f59c.tar.xz |
import the U-Boot code and make it compile
Diffstat (limited to 'include/backlight.h')
-rw-r--r-- | include/backlight.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/include/backlight.h b/include/backlight.h new file mode 100644 index 0000000..ac59eb2 --- /dev/null +++ b/include/backlight.h @@ -0,0 +1,55 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2016 Google, Inc + * Written by Simon Glass <sjg@chromium.org> + */ + +#ifndef _BACKLIGHT_H +#define _BACKLIGHT_H + +enum { + BACKLIGHT_MAX = 100, + BACKLIGHT_MIN = 0, + BACKLIGHT_OFF = -1, + BACKLIGHT_DEFAULT = -2, +}; + +struct backlight_ops { + /** + * enable() - Enable a backlight + * + * @dev: Backlight device to enable + * @return 0 if OK, -ve on error + */ + int (*enable)(struct udevice *dev); + + /** + * set_brightness - Set brightness + * + * @dev: Backlight device to update + * @percent: Brightness value (0 to 100, or BACKLIGHT_... value) + * @return 0 if OK, -ve on error + */ + int (*set_brightness)(struct udevice *dev, int percent); +}; + +#define backlight_get_ops(dev) ((struct backlight_ops *)(dev)->driver->ops) + +/** + * backlight_enable() - Enable a backlight + * + * @dev: Backlight device to enable + * @return 0 if OK, -ve on error + */ +int backlight_enable(struct udevice *dev); + +/** + * backlight_set_brightness - Set brightness + * + * @dev: Backlight device to update + * @percent: Brightness value (0 to 100, or BACKLIGHT_... value) + * @return 0 if OK, -ve on error + */ +int backlight_set_brightness(struct udevice *dev, int percent); + +#endif |