TI OMAP2+

modulename: omap-cpufreq.ko

configname: CONFIG_ARM_OMAP2PLUS_CPUFREQ

Linux Kernel Configuration
└─>Power management and ACPI options
└─>CPU Frequency scaling
└─>TI OMAP2+
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/cpufreq/omap-cpufreq.c