AMD Elan SC400 and SC410

modulename: elanfreq.ko

configname: CONFIG_ELAN_CPUFREQ

Linux Kernel Configuration
└─>Power management and ACPI options
└─>CPU Frequency scaling
└─>AMD Elan SC400 and SC410
In linux kernel since version 2.6.12  
This adds the CPUFreq driver for AMD Elan SC400 and SC410
processors.

You need to specify the processor maximum speed as boot
parameter: elanfreq=maxspeed (in kHz) or as module
parameter "max_freq".

For details, take a look at Documentation/cpu-freq/.

If in doubt, say N.

source code: