TC Block Clocksource

modulename: timer-atmel-tcb.ko

and/or

tcb_clksrc.ko

configname: CONFIG_ATMEL_TCB_CLKSRC

Linux Kernel Configuration
└─>Device Drivers
└─>Misc devices
└─>TC Block Clocksource
In linux kernel since version 2.6.26 (release Date: 2008-07-13)  
Select this to get a high precision clocksource based on a
TC block with a 5+ MHz base clock rate. Two timer channels
are combined to make a single 32-bit timer.

When GENERIC_CLOCKEVENTS is defined, the third timer channel
may be used as a clock event device supporting oneshot mode
(delays of up to two seconds) based on the 32 KiHz clock.

source code: