mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-14 22:12:14 +01:00
Michael Hanselmann
5474c120aa
This patch contains a total rewrite of the backlight infrastructure for portable Apple computers. Backward compatibility is retained. A sysfs interface allows userland to control the brightness with more steps than before. Userland is allowed to upload a brightness curve for different monitors, similar to Mac OS X. [[email protected]: add needed exports] Signed-off-by: Michael Hanselmann <[email protected]> Acked-by: Benjamin Herrenschmidt <[email protected]> Cc: Richard Purdie <[email protected]> Cc: "Antonino A. Daplas" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
32 lines
863 B
C
32 lines
863 B
C
/*
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* Routines for handling backlight control on PowerBooks
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*
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* For now, implementation resides in
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* arch/powerpc/platforms/powermac/backlight.c
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*
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*/
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#ifndef __ASM_POWERPC_BACKLIGHT_H
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#define __ASM_POWERPC_BACKLIGHT_H
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#ifdef __KERNEL__
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#include <linux/fb.h>
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#include <linux/mutex.h>
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/* For locking instructions, see the implementation file */
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extern struct backlight_device *pmac_backlight;
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extern struct mutex pmac_backlight_mutex;
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extern void pmac_backlight_calc_curve(struct fb_info*);
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extern int pmac_backlight_curve_lookup(struct fb_info *info, int value);
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extern int pmac_has_backlight_type(const char *type);
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extern void pmac_backlight_key_up(void);
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extern void pmac_backlight_key_down(void);
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extern int pmac_backlight_set_legacy_brightness(int brightness);
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extern int pmac_backlight_get_legacy_brightness(void);
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#endif /* __KERNEL__ */
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#endif
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