CONFIG_CPLB_INFO is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin
default or selected kernelversion does not have config value CONFIG_CPLB_INFO.
Result is shown for kernelversion 6.7-rc3

Display the CPLB information

modulename: cplbinfo.ko

configname: CONFIG_CPLB_INFO

Linux Kernel Configuration
└─>Kernel hacking
└─>Display the CPLB information
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
Display the CPLB information via /proc/cplbinfo.

source code: