CONFIG_CLKDEV_LOOKUP (not configurable)

modulename: clkdev.ko

configname: CONFIG_CLKDEV_LOOKUP

Linux Kernel Configuration
└─>Device Drivers
└─>CLKDEV_LOOKUP
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
source code:
drivers/clk/clkdev.c
selects
CONFIG_HAVE_CLK