I've written a frequency scaling module for a 7448 which plugs into the
linux governors.
I plugged in into 2.6.20.16 on a taiga board.
I have a good handle on how arch/i386/kernel/cpu/cpufreq handles
cpufreq, its not clear how
it should be done in the powerpc -- there's some frequency scaling stuff
in powermac/, but its not
useful for taiga board (I like the ToDO -- needs a big cleanup).
What I'm seeing on the taiga board:
1) when I enter nap, the ethernet seems to be VERY lethagic,
unless I spin the processor...
2) /2 works fine, /4 causes the ethernet/disk to break...
I'm very open to suggestions...it also appears cpufreq can be a module
on SOME architectures...
marty
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