Allwinner A31 PRCM controller

modulename: clk-sun6i-ar100.ko

and/or

sun6i-prcm.ko

configname: CONFIG_MFD_SUN6I_PRCM

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>Allwinner A31 PRCM controller
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Support for the PRCM (Power/Reset/Clock Management) unit available
in A31 SoC.

source code:
drivers/clk/sunxi/
selects
CONFIG_MFD_CORE