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[PATCH] Rewritten backlight infrastructure for portable Apple computers

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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.

[akpm@osdl.org: add needed exports]
Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Michael Hanselmann
2006-06-25 05:47:08 -07:00
committed by Linus Torvalds
parent 17660bdd5c
commit 5474c120aa
26 changed files with 1534 additions and 716 deletions
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30
include/asm-powerpc/backlight.h
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@@ -2,30 +2,30 @@
* Routines for handling backlight control on PowerBooks
*
* For now, implementation resides in
* arch/powerpc/platforms/powermac/pmac_support.c
* arch/powerpc/platforms/powermac/backlight.c
*
*/
#ifndef __ASM_POWERPC_BACKLIGHT_H
#define __ASM_POWERPC_BACKLIGHT_H
#ifdef __KERNEL__
/* Abstract values */
#define BACKLIGHT_OFF 0
#define BACKLIGHT_MIN 1
#define BACKLIGHT_MAX 0xf
#include <linux/fb.h>
#include <linux/mutex.h>
struct backlight_controller {
int (*set_enable)(int enable, int level, void *data);
int (*set_level)(int level, void *data);
};
/* For locking instructions, see the implementation file */
extern struct backlight_device *pmac_backlight;
extern struct mutex pmac_backlight_mutex;
extern void register_backlight_controller(struct backlight_controller *ctrler, void *data, char *type);
extern void unregister_backlight_controller(struct backlight_controller *ctrler, void *data);
extern void pmac_backlight_calc_curve(struct fb_info*);
extern int pmac_backlight_curve_lookup(struct fb_info *info, int value);
extern int set_backlight_enable(int enable);
extern int get_backlight_enable(void);
extern int set_backlight_level(int level);
extern int get_backlight_level(void);
extern int pmac_has_backlight_type(const char *type);
extern void pmac_backlight_key_up(void);
extern void pmac_backlight_key_down(void);
extern int pmac_backlight_set_legacy_brightness(int brightness);
extern int pmac_backlight_get_legacy_brightness(void);
#endif /* __KERNEL__ */
#endif