CONFIG_DEBUG_AT91_SAMA7G5_FLEXCOM3 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Kernel low-level debugging on SAMA7G5 FLEXCOM3
configname: CONFIG_DEBUG_AT91_SAMA7G5_FLEXCOM3
Kernel low-level debugging port
└─>Kernel low-level debugging on SAMA7G5 FLEXCOM3
In linux kernel since version 5.2 (release Date: 2019-07-07)
Say Y here if you want kernel low-level debugging support
on the FLEXCOM3 port of SAMA7G5.
on the FLEXCOM3 port of SAMA7G5.