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 43