Intel Extensible Firmware Interface - Manual (Page 352)

Extensible Firmware Interface Specification
10-58 12/01/02 Version 1.10
SERIAL_IO.Reset()
Summary
Resets the serial device.
Prototype
EFI_STATUS
(EFIAPI *EFI_SERIAL_RESET) (
IN SERIAL_IO_INTERFACE *This
);
Parameters
This A pointer to the SERIAL_IO_INTERFACE instance. Type
SERIAL_IO_INTERFACE is defined in Section 10.12.
Description
The Reset() function resets the hardware of a serial device.
Status Codes Returned
EFI_SUCCESS The serial device was reset.
EFI_DEVICE_ERROR The serial device could not be reset.