Clocksource for STM32 SoCs

modulename: timer-stm32.ko

configname: CONFIG_CLKSRC_STM32

Linux Kernel Configuration
└─>Device Drivers
└─>Clock Source drivers
└─>Device Tree and Open Firmware support
└─>Clocksource for STM32 SoCs
In linux kernel since version 4.1 (release Date: 2015-06-21)  
source code:
drivers/clocksource/timer-stm32.c