CONFIG_ARCH_RCAR_GEN2 (not configurable)

modulename: setup-rcar-gen2.ko

and/or

pm-rcar-gen2.ko

configname: CONFIG_ARCH_RCAR_GEN2

Linux Kernel Configuration
└─>Device Drivers
└─>SOC (System On Chip) specific Drivers
└─>Renesas SoC driver support
└─>ARCH_RCAR_GEN2
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
/arch/arm/mach-shmobile/