From fa19d63488bd108a308f575064779bb69123efbc Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Mon, 3 Mar 2008 17:27:46 +1100 Subject: [PATCH] [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 Signed-off-by: Paul Mackerras --- drivers/macintosh/via-pmu-backlight.c | 5 +++-- 1 file 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); -- 2.30.2