58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2016 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef _BACKLIGHT_H
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#define _BACKLIGHT_H
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struct udevice;
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enum {
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BACKLIGHT_MAX = 100,
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BACKLIGHT_MIN = 0,
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BACKLIGHT_OFF = -1,
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BACKLIGHT_DEFAULT = -2,
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};
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struct backlight_ops {
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/**
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* enable() - Enable a backlight
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*
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* @dev: Backlight device to enable
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* @return 0 if OK, -ve on error
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*/
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int (*enable)(struct udevice *dev);
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/**
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* set_brightness - Set brightness
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*
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* @dev: Backlight device to update
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* @percent: Brightness value (0 to 100, or BACKLIGHT_... value)
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* @return 0 if OK, -ve on error
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*/
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int (*set_brightness)(struct udevice *dev, int percent);
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};
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#define backlight_get_ops(dev) ((struct backlight_ops *)(dev)->driver->ops)
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/**
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* backlight_enable() - Enable a backlight
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*
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* @dev: Backlight device to enable
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* Return: 0 if OK, -ve on error
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*/
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int backlight_enable(struct udevice *dev);
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/**
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* backlight_set_brightness - Set brightness
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*
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* @dev: Backlight device to update
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* @percent: Brightness value (0 to 100, or BACKLIGHT_... value)
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* Return: 0 if OK, -ve on error
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*/
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int backlight_set_brightness(struct udevice *dev, int percent);
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#endif
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