OLPC XO-1 Real Time Clock

modulename: olpc-xo1-rtc.ko

configname: CONFIG_OLPC_XO1_RTC

Linux Kernel Configuration
└─>Bus options (PCI etc.)
└─>OLPC XO-1 Real Time Clock
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Add support for the XO-1 real time clock, which can be used as a
programmable wakeup source.

source code:
arch/x86/platform/olpc/olpc-xo1-rtc.c