/*
   * Routines for handling backlight control on PowerBooks
   *

   * For now, implementation resides in

   * arch/powerpc/platforms/powermac/backlight.c

   *
   */

  #ifndef __ASM_POWERPC_BACKLIGHT_H
  #define __ASM_POWERPC_BACKLIGHT_H

  #ifdef __KERNEL__

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

  /* For locking instructions, see the implementation file */
  extern struct backlight_device *pmac_backlight;
  extern struct mutex pmac_backlight_mutex;

  extern int pmac_backlight_curve_lookup(struct fb_info *info, int value);

  extern int pmac_has_backlight_type(const char *type);

  extern void pmac_backlight_key(int direction);
  static inline void pmac_backlight_key_up(void)
  {
  	pmac_backlight_key(0);
  }
  static inline void pmac_backlight_key_down(void)
  {
  	pmac_backlight_key(1);
  }

  extern void pmac_backlight_set_legacy_brightness_pmu(int brightness);

  extern int pmac_backlight_set_legacy_brightness(int brightness);
  extern int pmac_backlight_get_legacy_brightness(void);

  extern void pmac_backlight_enable(void);
  extern void pmac_backlight_disable(void);

  #endif /* __KERNEL__ */

  #endif