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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2016 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#ifndef _BACKLIGHT_H
#define _BACKLIGHT_H
struct udevice;
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
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