[PATCH] Rewritten backlight infrastructure for portable Apple computers

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>

1 files changed, 15 insertions, 15 deletions

diff --git a/include/asm-powerpc/backlight.h b/include/asm-powerpc/backlight.h
index 1ba1f27a0b63..a5e9e656e332 100644
--- a/include/asm-powerpc/backlight.h
+++ b/include/asm-powerpc/backlight.h
@@ -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