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 */
  17 extern struct backlight_device *pmac_backlight;
  18 extern struct mutex pmac_backlight_mutex;
  19
  20 extern int pmac_backlight_curve_lookup(struct fb_info *info, int value);
  21
  22 extern int pmac_has_backlight_type(const char *type);
  23
  24 extern void pmac_backlight_key(int direction);
  25 static inline void pmac_backlight_key_up(void)
  26 {
  27         pmac_backlight_key(0);
  28 }
  29 static inline void pmac_backlight_key_down(void)
  30 {
  31         pmac_backlight_key(1);
  32 }
  33
  34 extern void pmac_backlight_set_legacy_brightness_pmu(int brightness);
  35 extern int pmac_backlight_set_legacy_brightness(int brightness);
  36 extern int pmac_backlight_get_legacy_brightness(void);
  37
  38 extern void pmac_backlight_enable(void);
  39 extern void pmac_backlight_disable(void);
  40
  41 #endif /* __KERNEL__ */
  42 #endif