powerpc/cell/cpufreq: add spu aware cpufreq governor

[Dave Jones]

On Tue, Jul 08, 2008 at 08:43:43AM +0200, Arnd Bergmann wrote:
 > On Monday 07 July 2008, Dave Jones wrote:
 > > One question I do have though, is how userspace scripts are supposed
 > > to know they're to echo cbe_spu_governor into the relevant parts of
 > > sysfs.  I've not used anything with a cell. Do they expose the SPUs
 > > as regular CPUs, or do they show up in a different part of the tree?
 > 
 > An SPU is very different from a CPU from the user perspective.
 > SPUs show up in /sys/devices/system/spus, and if a user wants to access
 > them, the "spufs" file system needs to be mounted in the system, by
 > convention on /spu. 

Ok, that should be fairly simple to write scripts for.
All sounds good to me.

	Dave

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