From ae51f41d14f548d494ac41e0d21137c5a4c3f59c Mon Sep 17 00:00:00 2001 From: Iru Cai Date: Wed, 30 Oct 2019 14:21:52 +0800 Subject: import the U-Boot code and make it compile --- include/backlight.h | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 include/backlight.h (limited to 'include/backlight.h') 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 + */ + +#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 -- cgit v1.2.3