CONFIG_TEGRA_TIMER (not configurable)

modulename: timer-tegra.ko

and/or

tegra20_timer.ko

configname: CONFIG_TEGRA_TIMER

Linux Kernel Configuration
└─>Device Drivers
└─>Clock Source drivers
└─>TEGRA_TIMER
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/clocksource/tegra20_timer.c

depends
 or CONFIG_ARM |
NOT | CONFIG_ARCH_USES_GETTIMEOFFSET or CONFIG_GENERIC_CLOCKEVENTS or CONFIG_ARCH_TEGRA or CONFIG_COMPILE_TEST

is depended by
CONFIG_ARCH_TEGRA_2x_SOC