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 42