Epson RX-4581

modulename: rtc-rx4581.ko

configname: CONFIG_RTC_DRV_RX4581

Linux Kernel Configuration
└─>Device Drivers
└─>Real Time Clock
└─>Epson RX-4581
In linux kernel since version 3.1 (release Date: 2011-10-24)  
If you say yes here you will get support for the Epson RX-4581.

This driver can also be built as a module. If so the module
will be called rtc-rx4581.

source code: