39   The model option "duplex=1" enables duplex operation to the port.
40   In duplex mode, a pair of ports are created instead of single port,
43   In duplex mode, each port has DUPLEX capability.
54 static bool duplex;  variable
58 module_param(duplex, bool, 0444);
59 MODULE_PARM_DESC(duplex, "create DUPLEX ports");
64 	int duplex;  member
85 	if (p->duplex)  in dummy_input()
117 	rec->duplex = duplex;  in create_port()
121 	if (duplex)  in create_port()
128 	if (duplex)  in create_port()
183 		if (duplex) {  in register_client()