diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-03-03 17:27:46 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-03-13 10:09:27 +1100 |
| commit | fa19d63488bd108a308f575064779bb69123efbc (patch) | |
| tree | 97dc8f59e050fd39ac141e0b5e0ddac889ed5580 /drivers/macintosh/via-pmu-backlight.c | |
| parent | 7f172890a8f8744c4005c267ae9e228411ab173f (diff) | |
| download | lwn-fa19d63488bd108a308f575064779bb69123efbc.tar.gz lwn-fa19d63488bd108a308f575064779bb69123efbc.zip | |
[POWERPC] Fix sleep on some powerbooks
The PMU backlight code would kick in during sleep/resume even on
machines that use a different backlight method. This breaks
sleep on some PowerBooks.
This fixes it by adding a flag to indicate whether the backlight
is controlled by the PMU, and testing that before trying to use
the PMU to turn off the backlight during sleep.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'drivers/macintosh/via-pmu-backlight.c')
| -rw-r--r-- | drivers/macintosh/via-pmu-backlight.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/macintosh/via-pmu-backlight.c b/drivers/macintosh/via-pmu-backlight.c index 741a2e3f4fc6..a348bb0791d3 100644 --- a/drivers/macintosh/via-pmu-backlight.c +++ b/drivers/macintosh/via-pmu-backlight.c @@ -17,7 +17,7 @@ static struct backlight_ops pmu_backlight_data; static DEFINE_SPINLOCK(pmu_backlight_lock); -static int sleeping; +static int sleeping, uses_pmu_bl; static u8 bl_curve[FB_BACKLIGHT_LEVELS]; static void pmu_backlight_init_curve(u8 off, u8 min, u8 max) @@ -128,7 +128,7 @@ void pmu_backlight_set_sleep(int sleep) spin_lock_irqsave(&pmu_backlight_lock, flags); sleeping = sleep; - if (pmac_backlight) { + if (pmac_backlight && uses_pmu_bl) { if (sleep) { struct adb_request req; @@ -166,6 +166,7 @@ void __init pmu_backlight_init() printk(KERN_ERR "PMU Backlight registration failed\n"); return; } + uses_pmu_bl = 1; bd->props.max_brightness = FB_BACKLIGHT_LEVELS - 1; pmu_backlight_init_curve(0x7F, 0x46, 0x0E); |