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CONFIG_SERIAL_LEGACY¶ 
Legacy
Type: bool
Help¶
Select this if the serial port shall be accessed via legacy port in/out instructions.
Kconfig definition¶
At arch/x86/Kconfig:135
Included via Kconfig:3
Menu path: (top menu) → Serial IO type
config SERIAL_LEGACY
    bool
    prompt "Legacy" if <choice: Serial IO type>
    depends on <choice: Serial IO type>
    help
      Select this if the serial port shall be accessed via legacy port in/out
      instructions.
(Definitions include propagated dependencies, including from if’s and menus.)