CONFIG_ARMADA_37XX_CLK (not configurable)

modulename: armada-37xx-xtal.ko

and/or

armada-37xx-tbg.ko

and/or

armada-37xx-periph.ko

configname: CONFIG_ARMADA_37XX_CLK

Linux Kernel Configuration
└─>Device Drivers
└─>Common Clock Framework
└─>ARMADA_37XX_CLK
In linux kernel since version 4.1 (release Date: 2015-06-21)  
source code:
drivers/clk/mvebu/armada-37xx-xtal.c