4b755999d6
This patch fixes several problems: - The legacy backlight value might be set at interrupt time. Introduced a worker to prevent it from directly calling the backlight code. - via-pmu allows the backlight to be grabbed, in which case we need to prevent other kernel code from changing the brightness. - Don't send PMU requests in via-pmu-backlight when the machine is about to sleep or waking up. - More Kconfig fixes. Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
42 lines
1.1 KiB
C
42 lines
1.1 KiB
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 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(int direction);
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static inline void pmac_backlight_key_up(void)
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{
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pmac_backlight_key(0);
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}
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static inline void pmac_backlight_key_down(void)
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{
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pmac_backlight_key(1);
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}
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extern void pmac_backlight_set_legacy_brightness_pmu(int brightness);
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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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extern void pmac_backlight_enable(void);
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extern void pmac_backlight_disable(void);
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#endif /* __KERNEL__ */
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#endif
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