Cpu Idle Driver for the Exynos processors

modulename: cpuidle-exynos.ko

configname: CONFIG_ARM_EXYNOS_CPUIDLE

Linux Kernel Configuration
└─>Power management and ACPI options
└─>CPU Idle
└─>ARM CPU Idle Drivers
└─>Cpu Idle Driver for the Exynos processors
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Select this to enable cpuidle for Exynos processors

source code:
drivers/cpuidle/cpuidle-exynos.c