CONFIG_DEBUG_AT91_SAMV7_USART1 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Kernel low-level debugging via SAMV7 USART1
configname: CONFIG_DEBUG_AT91_SAMV7_USART1
Kernel low-level debugging port
└─>Kernel low-level debugging via SAMV7 USART1
In linux kernel since version 4.2 (release Date: 2015-08-30)
Say Y here if you want the debug print routines to direct
their output to the USART1 port on SAMV7 based
machines.
their output to the USART1 port on SAMV7 based
machines.