Fujitsu-laptop update

Add additional capabilities to the Fujitsu-laptop driver.

 * Brightness hotkey actions are sent to userspace. This can be disabled
   using a module parameter if it causes issues with models which handle
   these keys transparently in the BIOS.

 * Actions of additional hotkeys found on some Fujitsu models (eg: the
   suspend key and the dedicated "power on passphrase" keys) are broadcast
   to userspace.

 * An alternative brightness control method used by some Fujitsu models
   (for example, the S6410) is now supported, enabling software brightness
   controls on models using this method.

 * DMI-based module aliases are configured for the S6410 and S7020.

 * The current LCD brightness after booting should now be reflected in the
   standard backlight interface sysfs file (previously it was always set to
   0).  The platform brightness sysfs interface has always been fine.

Thanks go to Peter Gruber who provided a significant portion of this code
and tested various iterations of the patch on his S6410.

Signed-off-by: Peter Gruber <[email protected]>
Signed-off-by: Jonathan Woithe <[email protected]>
Signed-off-by: Len Brown <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>

MAINTAINERS

@@ -1792,6 +1792,12 @@ P:	David Howells
 M:	[email protected]
 S:	Maintained
 
+FUJITSU LAPTOP EXTRAS
+P:	Jonathan Woithe
+M:	[email protected]
+L:	[email protected]
+S:	Maintained
+
 FUSE: FILESYSTEM IN USERSPACE
 P:	Miklos Szeredi
 M:	[email protected]

drivers/misc/Kconfig

@@ -185,11 +185,22 @@ config FUJITSU_LAPTOP
 
 	    * P2xxx/P5xxx/S6xxx/S7xxx series Lifebooks
 	    * Possibly other Fujitsu laptop models
+	    * Tested with S6410 and S7020
 
-	  It adds support for LCD brightness control.
+	  It adds support for LCD brightness control and some hotkeys.
 
 	  If you have a Fujitsu laptop, say Y or M here.
 
+config FUJITSU_LAPTOP_DEBUG
+	bool "Verbose debug mode for Fujitsu Laptop Extras"
+	depends on FUJITSU_LAPTOP
+	default n
+	---help---
+	  Enables extra debug output from the fujitsu extras driver, at the
+	  expense of a slight increase in driver size.
+
+	  If you are not sure, say N here.
+
 config TC1100_WMI
 	tristate "HP Compaq TC1100 Tablet WMI Extras (EXPERIMENTAL)"
 	depends on X86 && !X86_64