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/mutex.h>
  14
  15 struct backlight_device;
  16
  17 /* For locking instructions, see the implementation file */
  18 extern struct backlight_device *pmac_backlight;
  19 extern struct mutex pmac_backlight_mutex;
  20
  21 extern int pmac_has_backlight_type(const char *type);
  22
  23 extern void pmac_backlight_key(int direction);
  24 static inline void pmac_backlight_key_up(void)
  25 {
  26         pmac_backlight_key(0);
  27 }
  28 static inline void pmac_backlight_key_down(void)
  29 {
  30         pmac_backlight_key(1);
  31 }
  32
  33 extern void pmac_backlight_set_legacy_brightness_pmu(int brightness);
  34 extern int pmac_backlight_set_legacy_brightness(int brightness);
  35 extern int pmac_backlight_get_legacy_brightness(void);
  36
  37 extern void pmac_backlight_enable(void);
  38 extern void pmac_backlight_disable(void);
  39
  40 #endif /* __KERNEL__ */
  41 #endif