CPU frequency scaling

[kc8apf]

I have a Lanner FW-7520 which is a 1Ghz Celeron M in a fanless case.  When running pfSense, the case gets quite hot to the touch.  It appears that, at least on the embedded images, the cpu frequency scaling support isn't enabled.  I've managed to load the cpufreq kernel module and start powerd, but all it does is complain about being unable to adjust the frequency since the TSC timecounter is in use.  The kernel modules for the other common timecounters (HPET primarily) don't appear to be present.

Has anyone attempted this?  Do I just need to obtain the kernel module for the HPET timecounter from somewhere else?