*
* @since 0.1.1
*/
-char *sp_get_port_description(struct sp_port *port);
+char *sp_get_port_description(const struct sp_port *port);
/**
* Get the transport type used by a port.
*
* @since 0.1.1
*/
-enum sp_transport sp_get_port_transport(struct sp_port *port);
+enum sp_transport sp_get_port_transport(const struct sp_port *port);
/**
* Get the USB bus number and address on bus of a USB serial adapter port.