default or selected kernelversion does not have config value CONFIG_CLKSRC_LPC32XX.
Result is shown for kernelversion 6.9-rc4
Clocksource for LPC32XX
modulename: timer-lpc32xx.ko
configname: CONFIG_CLKSRC_LPC32XX
Linux Kernel Configuration
└─>Device Drivers
└─>Clock Source drivers
└─>Clocksource for LPC32XX
In linux kernel since version 3.10 (release Date: 2013-06-30)
Support for the LPC32XX clocksource.