VIA/WonderMedia 85xx SoC RTC

modulename: rtc-vt8500.ko

configname: CONFIG_RTC_DRV_VT8500

Linux Kernel Configuration
└─>Device Drivers
└─>Real Time Clock
└─>VIA/WonderMedia 85xx SoC RTC
In linux kernel since version 3 (release Date: 2011-07-21)  
If you say Y here you will get access to the real time clock
built into your VIA VT8500 SoC or its relatives.

source code:
depends
CONFIG_RTC_CLASS
CONFIG_ARCH_VT8500 or CONFIG_COMPILE_TEST