Freescale i.MX6 cpufreq support

modulename: imx6q-cpufreq.ko

configname: CONFIG_ARM_IMX6Q_CPUFREQ

Linux Kernel Configuration
└─>Power management and ACPI options
└─>CPU Frequency scaling
└─>Freescale i.MX6 cpufreq support
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This adds cpufreq driver support for Freescale i.MX6 series SoCs.

If in doubt, say N.

source code:
drivers/cpufreq/imx6q-cpufreq.c
selects
CONFIG_PM_OPP