LXR linux/arch/powerpc/include/asm/backlight.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Routines for handling backlight control on PowerBooks
   4 *
   5 * For now, implementation resides in
   6 * arch/powerpc/platforms/powermac/backlight.c
   7 *
   8 */
   9#ifndef __ASM_POWERPC_BACKLIGHT_H
  10#define __ASM_POWERPC_BACKLIGHT_H
  11#ifdef __KERNEL__
  12
  13#include <linux/fb.h>
  14#include <linux/mutex.h>
  15
  16/* For locking instructions, see the implementation file */
  17extern struct backlight_device *pmac_backlight;
  18extern struct mutex pmac_backlight_mutex;
  19
  20extern int pmac_backlight_curve_lookup(struct fb_info *info, int value);
  21
  22extern int pmac_has_backlight_type(const char *type);
  23
  24extern void pmac_backlight_key(int direction);
  25static inline void pmac_backlight_key_up(void)
  26{
  27        pmac_backlight_key(0);
  28}
  29static inline void pmac_backlight_key_down(void)
  30{
  31        pmac_backlight_key(1);
  32}
  33
  34extern void pmac_backlight_set_legacy_brightness_pmu(int brightness);
  35extern int pmac_backlight_set_legacy_brightness(int brightness);
  36extern int pmac_backlight_get_legacy_brightness(void);
  37
  38extern void pmac_backlight_enable(void);
  39extern void pmac_backlight_disable(void);
  40
  41#endif /* __KERNEL__ */
  42#endif
  43