Some devices may have ports with unknown type/protocol which need to
be tagged (though not supported by WWAN core). This will be the case
for cdc-wdm based drivers.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
  * @WWAN_PORT_QMI: Qcom modem/MSM interface for modem control
  * @WWAN_PORT_QCDM: Qcom Modem diagnostic interface
  * @WWAN_PORT_FIREHOSE: XML based command protocol
+ * @WWAN_PORT_UNKNOWN: Unknown port type
  * @WWAN_PORT_MAX: Number of supported port types
  */
 enum wwan_port_type {
        WWAN_PORT_QMI,
        WWAN_PORT_QCDM,
        WWAN_PORT_FIREHOSE,
-       WWAN_PORT_MAX,
+       WWAN_PORT_UNKNOWN,
+       WWAN_PORT_MAX = WWAN_PORT_UNKNOWN,
 };
 
 struct wwan_port;