Routing is decided based on enabled logical/virtual devices. For a valid devicetree, one should have only one of SP3 and GPIO0, and only one of SP4 and GPIO1, enabled at a time in configuration. Change-Id: I02017786aba9dd22d12403aaa71d7641f5bbf997 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/10177 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>