linux/drivers/video/fbdev/core/fb_backlight.c

// SPDX-License-Identifier: GPL-2.0-or-later

#include <linux/export.h>
#include <linux/fb.h>
#include <linux/mutex.h>

#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
/*
 * This function generates a linear backlight curve
 *
 *     0: off
 *   1-7: min
 * 8-127: linear from min to max
 */
void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max)
{ … }
EXPORT_SYMBOL_GPL(…);

struct backlight_device *fb_bl_device(struct fb_info *info)
{ … }
EXPORT_SYMBOL(…);
#endif