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CPU frequency and voltage scaling code in the Linux(TM) kernel
L i n u x C P U F r e q
Dominik Brodowski <>
Clock scaling allows you to change the clock speed of the CPUs on the
fly. This is a nice method to save battery power, because the lower
the clock speed, the less power the CPU consumes.
Documents in this directory:
amd-powernow.txt - AMD powernow driver specific file.
core.txt - General description of the CPUFreq core and
of CPUFreq notifiers.
cpu-drivers.txt - How to implement a new cpufreq processor driver.
cpufreq-nforce2.txt - nVidia nForce2 platform specific file.
cpufreq-stats.txt - General description of sysfs cpufreq stats.
index.txt - File index, Mailing list and Links (this document)
pcc-cpufreq.txt - PCC cpufreq driver specific file.
Mailing List
There is a CPU frequency changing CVS commit and general list where
you can report bugs, problems or submit patches. To post a message,
send an email to
the FTP archives:
how to access the CVS repository:
the CPUFreq Mailing list:
Clock and voltage scaling for the SA-1100: