R-Car Gen2 CPG clock support

modulename: rcar-gen2-cpg.ko

configname: CONFIG_CLK_RCAR_GEN2_CPG

Linux Kernel Configuration
└─>Device Drivers
└─>Common Clock Framework
└─>R-Car Gen2 CPG clock support
In linux kernel since version 4.2 (release Date: 2015-08-30)  
source code:
drivers/clk/renesas/rcar-gen2-cpg.c