linux-kernel - [PATCH v4 2/9] usb: typec: Add retimer handle to port

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Date:   Mon, 11 Jul 2022 07:22:56 +0000
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        chrome-platform@...ts.linux.dev
Cc:     bleung@...omium.org, heikki.krogerus@...ux.intel.com,
        Prashant Malani <pmalani@...omium.org>,
        Daisuke Nojiri <dnojiri@...omium.org>,
        "Dustin L. Howett" <dustin@...ett.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guenter Roeck <groeck@...omium.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        Tzung-Bi Shih <tzungbi@...nel.org>
Subject: [PATCH v4 2/9] usb: typec: Add retimer handle to port

Similar to mux and orientation switch, add a handle for registered
retimer to the port, so that it has handles to the various switches
connected to it.

Signed-off-by: Prashant Malani <pmalani@...omium.org>
---

Changes since v3:
- No changes.

Changes since v2:
- No changes.

Changes since v1:
- Relinquish retimer reference during typec_release.

 drivers/usb/typec/class.c | 9 +++++++++
 drivers/usb/typec/class.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 9062836bb638..f08e32d552b4 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -12,6 +12,7 @@
 #include <linux/slab.h>
 #include <linux/usb/pd_vdo.h>
 #include <linux/usb/typec_mux.h>
+#include <linux/usb/typec_retimer.h>
 
 #include "bus.h"
 #include "class.h"
@@ -1736,6 +1737,7 @@ static void typec_release(struct device *dev)
 	ida_destroy(&port->mode_ids);
 	typec_switch_put(port->sw);
 	typec_mux_put(port->mux);
+	typec_retimer_put(port->retimer);
 	kfree(port->cap);
 	kfree(port);
 }
@@ -2249,6 +2251,13 @@ struct typec_port *typec_register_port(struct device *parent,
 		return ERR_PTR(ret);
 	}
 
+	port->retimer = typec_retimer_get(&port->dev);
+	if (IS_ERR(port->retimer)) {
+		ret = PTR_ERR(port->retimer);
+		put_device(&port->dev);
+		return ERR_PTR(ret);
+	}
+
 	ret = device_add(&port->dev);
 	if (ret) {
 		dev_err(parent, "failed to register port (%d)\n", ret);
diff --git a/drivers/usb/typec/class.h b/drivers/usb/typec/class.h
index 43fcf9e37a8c..673b2952b074 100644
--- a/drivers/usb/typec/class.h
+++ b/drivers/usb/typec/class.h
@@ -55,6 +55,7 @@ struct typec_port {
 	enum typec_orientation		orientation;
 	struct typec_switch		*sw;
 	struct typec_mux		*mux;
+	struct typec_retimer		*retimer;
 
 	const struct typec_capability	*cap;
 	const struct typec_operations   *ops;
-- 
2.37.0.144.g8ac04bfd2-goog