kernelconfig_penguin
CONFIG_AT91_EARLY_USART3 is not available for the default architecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_AT91_EARLY_USART3.
Result is shown for kernelversion 3.4.99

USART3

configname: CONFIG_AT91_EARLY_USART3

Select a UART for early kernel messages
└─> USART3