CONFIG_HAVE_CLK (not configurable)

modulename: pm_domain.ko

and/or

clock_ops.ko

and/or

clk-devres.ko

configname: CONFIG_HAVE_CLK

Linux Kernel Configuration
└─>HAVE_CLK
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
The <linux/clk.h> calls support software clock gating and
thus are a key power management tool on many systems.

source code:
arch/arm/mach-davinci/pm_domain.c