Samsung S5PV210 and S5PC110

modulename: s5pv210-cpufreq.ko

configname: CONFIG_ARM_S5PV210_CPUFREQ

Linux Kernel Configuration
└─>Power management and ACPI options
└─>CPU Frequency scaling
└─>Samsung S5PV210 and S5PC110
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This adds the CPUFreq driver for Samsung S5PV210 and
S5PC110 SoCs.

If in doubt, say N.

source code:
drivers/cpufreq/s5pv210-cpufreq.c