usb: Link the ports to the connectors they are attached to

Creating link to the USB Type-C connector for every new port
that is added when possible.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20210407065555.88110-3-heikki.krogerus@linux.intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/ABI/testing/sysfs-bus-usb

@@ -255,6 +255,15 @@ Description:
 		is permitted, "u2" if only u2 is permitted, "u1_u2" if both u1 and
 		u2 are permitted.
 
+What:		/sys/bus/usb/devices/.../(hub interface)/portX/connector
+Date:		April 2021
+Contact:	Heikki Krogerus <heikki.krogerus@linux.intel.com>
+Description:
+		Link to the USB Type-C connector when available. This link is
+		only created when USB Type-C Connector Class is enabled, and
+		only if the system firmware is capable of describing the
+		connection between a port and its connector.
+
 What:		/sys/bus/usb/devices/.../power/usb2_lpm_l1_timeout
 Date:		May 2013
 Contact:	Mathias Nyman <mathias.nyman@linux.intel.com>

drivers/usb/core/port.c

@@ -9,6 +9,7 @@
 
 #include <linux/slab.h>
 #include <linux/pm_qos.h>
+#include <linux/usb/typec.h>
 
 #include "hub.h"
 
@@ -576,6 +577,7 @@ int usb_hub_create_port_device(struct usb_hub *hub, int port1)
 	}
 
 	find_and_link_peer(hub, port1);
+	typec_link_port(&port_dev->dev);
 
 	/*
 	 * Enable runtime pm and hold a refernce that hub_configure()
@@ -619,5 +621,6 @@ void usb_hub_remove_port_device(struct usb_hub *hub, int port1)
 	peer = port_dev->peer;
 	if (peer)
 		unlink_peers(port_dev, peer);
+	typec_unlink_port(&port_dev->dev);
 	device_unregister(&port_dev->dev);
 }