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[PATCH] powermac: Combined fixes for backlight code

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This patch fixes several problems:
- pmac_backlight_key() is called under interrupt context, and therefore
  can't use mutexes or semaphores, so defer the backlight level for
  later, as it's not critical (original code by Aristeu S. Rozanski F.
  <aris@valeta.org>).
- Add exports for functions that might be called from modules
- Fix Kconfig depdencies on PMAC_BACKLIGHT.
- Fix locking issues on calls from inside the driver (reported by
  Aristeu S. Rozanski F., too)
- Fix wrong calculation of backlight values in some of the drivers
- Replace pmac_backlight_key_up/down by inline functions

[akpm@osdl.org: fix function prototypes]
Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch>
Acked-by: Aristeu S. Rozanski F. <aris@valeta.org>
Acked-by: Rene Nussbaumer <linux-kernel@killerfox.forkbomb.ch>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Michael Hanselmann
2006-07-10 04:44:45 -07:00
committed by Linus Torvalds
parent 58d383a622
commit e01af0384f
10 changed files with 162 additions and 97 deletions
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5
drivers/macintosh/Kconfig
View File

@@ -113,7 +113,10 @@ config PMAC_MEDIABAY
config PMAC_BACKLIGHT
bool "Backlight control for LCD screens"
depends on ADB_PMU && (BROKEN || !PPC64)
depends on ADB_PMU && FB = y && (BROKEN || !PPC64)
select FB_BACKLIGHT
select BACKLIGHT_CLASS_DEVICE
select BACKLIGHT_LCD_SUPPORT
help
Say Y here to enable Macintosh specific extensions of the generic
backlight code. With this enabled, the brightness keys on older