Intel Speedstep on ICH-M chipsets (ioport interface)

modulename: speedstep-ich.ko


Linux Kernel Configuration
└─>Power management and ACPI options
└─>CPU Frequency scaling
└─>Intel Speedstep on ICH-M chipsets (ioport interface)
In linux kernel since version 2.6.12  
This adds the CPUFreq driver for certain mobile Intel Pentium III
(Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
ICH3 or ICH4 southbridge.

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

If in doubt, say N.

source code: