CONFIG_CLKIN_HALF is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin
default or selected kernelversion does not have config value CONFIG_CLKIN_HALF.
Result is shown for kernelversion 6.7-rc3
Half Clock In
configname: CONFIG_CLKIN_HALF
Linux Kernel Configuration
└─>Blackfin Processor Options
└─>Board customizations
└─>Half Clock In
In linux kernel since version 2.6.24 (release Date: 2008-01-24)
If this is set the clock will be divided by 2, before it goes to the PLL.