thunderbolt: Add USB4 port devices

Create devices for each USB4 port. This is needed when we add retimer
access when there is no device connected but may be useful for other
purposes too following what USB subsystem does. This exports a single
attribute "link" that shows the type of the USB4 link (or "none" if
there is no cable connected).

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 15 insertions, 2 deletions

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index e015dc93a916..7303c61a891a 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -2741,11 +2741,16 @@ int tb_switch_add(struct tb_switch *sw)
 				 sw->device_name);
 	}
 
+	ret = usb4_switch_add_ports(sw);
+	if (ret) {
+		dev_err(&sw->dev, "failed to add USB4 ports\n");
+		goto err_del;
+	}
+
 	ret = tb_switch_nvm_add(sw);
 	if (ret) {
 		dev_err(&sw->dev, "failed to add NVM devices\n");
-		device_del(&sw->dev);
-		return ret;
+		goto err_ports;
 	}
 
 	/*
@@ -2766,6 +2771,13 @@ int tb_switch_add(struct tb_switch *sw)
 
 	tb_switch_debugfs_init(sw);
 	return 0;
+
+err_ports:
+	usb4_switch_remove_ports(sw);
+err_del:
+	device_del(&sw->dev);
+
+	return ret;
 }
 
 /**
@@ -2805,6 +2817,7 @@ void tb_switch_remove(struct tb_switch *sw)
 		tb_plug_events_active(sw, false);
 
 	tb_switch_nvm_remove(sw);
+	usb4_switch_remove_ports(sw);
 
 	if (tb_route(sw))
 		dev_info(&sw->dev, "device disconnected\n");