linux-kernel - [PATCH v2] tcpm: switch check for role_sw device with fw

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Message-Id: <20251013-b4-ml-topic-tcpm-v2-1-63c9b2ab8a0b@pengutronix.de>
Date: Mon, 13 Oct 2025 11:43:40 +0200
From: Michael Grzeschik <m.grzeschik@...gutronix.de>
To: Badhri Jagan Sridharan <badhri@...gle.com>, 
 Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: kernel@...gutronix.de, linux-usb@...r.kernel.org, 
 linux-kernel@...r.kernel.org, stable@...r.kernel.org, 
 Michael Grzeschik <m.grzeschik@...gutronix.de>
Subject: [PATCH v2] tcpm: switch check for role_sw device with fw_node

When there is no port entry in the tcpci entry itself, the driver will
trigger an error message "OF: graph: no port node found in /...../typec" .

It is documented that the dts node should contain an connector entry
with ports and several port pointing to devices with usb-role-switch
property set. Only when those connector entry is missing, it should
check for port entries in the main node.

We switch the search order for looking after ports, which will avoid the
failure message while there are explicit connector entries.

Fixes: d56de8c9a17d ("usb: typec: tcpm: try to get role switch from tcpc fwnode")
Cc: stable@...r.kernel.org
Signed-off-by: Michael Grzeschik <m.grzeschik@...gutronix.de>
---
Changes in v2:
- fixed typos in the description
- added fixes tag
- added Cc: stable@...r.kernel.org
- Link to v1: https://lore.kernel.org/r/20251003-b4-ml-topic-tcpm-v1-1-3cdd05588acb@pengutronix.de
---
 drivers/usb/typec/tcpm/tcpm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index b2a568a5bc9b0ba5c50b7031d8e21ee09cefa349..cc78770509dbc6460d75816f544173d6ab4ef873 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -7876,9 +7876,9 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
 
 	port->partner_desc.identity = &port->partner_ident;
 
-	port->role_sw = usb_role_switch_get(port->dev);
+	port->role_sw = fwnode_usb_role_switch_get(tcpc->fwnode);
 	if (!port->role_sw)
-		port->role_sw = fwnode_usb_role_switch_get(tcpc->fwnode);
+		port->role_sw = usb_role_switch_get(port->dev);
 	if (IS_ERR(port->role_sw)) {
 		err = PTR_ERR(port->role_sw);
 		goto out_destroy_wq;

---
base-commit: e406d57be7bd2a4e73ea512c1ae36a40a44e499e
change-id: 20251003-b4-ml-topic-tcpm-27146727d76a

Best regards,
-- 
Michael Grzeschik <m.grzeschik@...gutronix.de>