Automatic Flow Control capability is not tied to this property. This is only one way of detecting it. The property is limited to be used only with 8250 driver. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>