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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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15
arch/powerpc/kernel/traps.c
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@ -32,6 +32,7 @@
#include <linux/delay.h>
#include <linux/kprobes.h>
#include <linux/kexec.h>
#include <linux/backlight.h>
#include <asm/kdebug.h>
#include <asm/pgtable.h>
@ -105,10 +106,18 @@ int die(const char *str, struct pt_regs *regs, long err)
spin_lock_irq(&die_lock);
bust_spinlocks(1);
#ifdef CONFIG_PMAC_BACKLIGHT
if (machine_is(powermac)) {
set_backlight_enable(1);
set_backlight_level(BACKLIGHT_MAX);
mutex_lock(&pmac_backlight_mutex);
if (machine_is(powermac) && pmac_backlight) {
struct backlight_properties *props;
down(&pmac_backlight->sem);
props = pmac_backlight->props;
props->brightness = props->max_brightness;
props->power = FB_BLANK_UNBLANK;
props->update_status(pmac_backlight);
up(&pmac_backlight->sem);
}
mutex_unlock(&pmac_backlight_mutex);
#endif
printk("Oops: %s, sig: %ld [#%d]\n", str, err, ++die_counter);
#ifdef CONFIG_PREEMPT