diff options
| author | Michael Hanselmann <linux-kernel@hansmi.ch> | 2006-06-25 05:47:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-25 10:00:59 -0700 |
| commit | 5474c120aafe78ca54bf272f7a01107c42da2b21 (patch) | |
| tree | c1b002a27703ce92c816bfb9844752186e33d403 /arch/powerpc/kernel/traps.c | |
| parent | 17660bdd5c1f1a165273c1a59cb5b87670a81cc4 (diff) | |
[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>
Diffstat (limited to 'arch/powerpc/kernel/traps.c')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 91a6e04d974..52f5659534f 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -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 |