Simple patch for 2.6.27 Linux kernel to provide full control over voltages/frequencies of AMD CPUs supporting Cool’n’Quiet technology.

Update: patches for 2.6.31 and 2.6.32 are available too.

Update 2010/02/10: it was pointed out that Linux-PHC project currently provides patches for AMD (see comments for details), so I’d strongly recommend checking their patches first instead of mine.