linux-kernel - [PATCH v2 4/5] usb: typec: ucsi: add update

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Message-Id: <20240411-ucsi-orient-aware-v2-4-d4b1cb22a33f@linaro.org>
Date: Thu, 11 Apr 2024 07:49:56 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Neil Armstrong <neil.armstrong@...aro.org>, linux-usb@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: [PATCH v2 4/5] usb: typec: ucsi: add update_connector callback

Add a callback to allow glue drivers to update the connector before
registering corresponding power supply and Type-C port. In particular
this is useful if glue drivers want to touch the connector's Type-C
capabilities structure.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/usb/typec/ucsi/ucsi.c | 3 +++
 drivers/usb/typec/ucsi/ucsi.h | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 7ad544c968e4..57e73b823a4c 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -1559,6 +1559,9 @@ static int ucsi_register_port(struct ucsi *ucsi, struct ucsi_connector *con)
 	cap->driver_data = con;
 	cap->ops = &ucsi_ops;
 
+	if (ucsi->ops->update_connector)
+		ucsi->ops->update_connector(con);
+
 	ret = ucsi_register_port_psy(con);
 	if (ret)
 		goto out;
diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
index 3e1241e38f3c..c4d103db9d0f 100644
--- a/drivers/usb/typec/ucsi/ucsi.h
+++ b/drivers/usb/typec/ucsi/ucsi.h
@@ -60,6 +60,7 @@ struct dentry;
  * @sync_write: Blocking write operation
  * @async_write: Non-blocking write operation
  * @update_altmodes: Squashes duplicate DP altmodes
+ * @update_connector: Update connector capabilities before registering
  * @connector_status: Updates connector status, called holding connector lock
  *
  * Read and write routines for UCSI interface. @sync_write must wait for the
@@ -75,6 +76,7 @@ struct ucsi_operations {
 			   const void *val, size_t val_len);
 	bool (*update_altmodes)(struct ucsi *ucsi, struct ucsi_altmode *orig,
 				struct ucsi_altmode *updated);
+	void (*update_connector)(struct ucsi_connector *con);
 	void (*connector_status)(struct ucsi_connector *con);
 };
 

-- 
2.39.2