linux-kernel - [PATCH 08/10] usb: typec: Add support for usb role switch in rt1711h driver

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Message-ID: <20181027095820.40056-9-chenyu56@huawei.com>
Date:   Sat, 27 Oct 2018 17:58:18 +0800
From:   Yu Chen <chenyu56@...wei.com>
To:     <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <suzhuangluan@...ilicon.com>, <kongfei@...ilicon.com>,
        Yu Chen <chenyu56@...wei.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lucas Tsai <lucas_tsai@...htek.com>,
        shufan_lee <shufan_lee@...htek.com>,
        John Stultz <john.stultz@...aro.org>,
        Binghui Wang <wangbinghui@...ilicon.com>
Subject: [PATCH 08/10] usb: typec: Add support for usb role switch in rt1711h driver

This patch add struct device_connection to rt1711h driver to support
find "usb-role-switch" in tcpm_register_port.

Cc: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Lucas Tsai <lucas_tsai@...htek.com>
Cc: shufan_lee <shufan_lee@...htek.com>
Cc: John Stultz <john.stultz@...aro.org>
Cc: Binghui Wang <wangbinghui@...ilicon.com>
Signed-off-by: Yu Chen <chenyu56@...wei.com>
---
 drivers/usb/typec/tcpm/tcpci_rt1711h.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
index 017389021b96..5f8b952612fe 100644
--- a/drivers/usb/typec/tcpm/tcpci_rt1711h.c
+++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
@@ -39,6 +39,7 @@ struct rt1711h_chip {
 	struct tcpci_data data;
 	struct tcpci *tcpci;
 	struct device *dev;
+	struct device_connection dev_conn;
 };
 
 static int rt1711h_read16(struct rt1711h_chip *chip, unsigned int reg, u16 *val)
@@ -237,6 +238,7 @@ static int rt1711h_probe(struct i2c_client *client,
 {
 	int ret;
 	struct rt1711h_chip *chip;
+	const char *dev_conn_end;
 
 	ret = rt1711h_check_revision(client);
 	if (ret < 0) {
@@ -254,6 +256,7 @@ static int rt1711h_probe(struct i2c_client *client,
 		return PTR_ERR(chip->data.regmap);
 
 	chip->dev = &client->dev;
+	dev_set_name(chip->dev, "rt1711h");
 	i2c_set_clientdata(client, chip);
 
 	ret = rt1711h_sw_reset(chip);
@@ -264,6 +267,15 @@ static int rt1711h_probe(struct i2c_client *client,
 	if (ret < 0)
 		return ret;
 
+	ret = device_property_read_string(chip->dev, "dev-conn-end",
+			&dev_conn_end);
+	if (!ret) {
+		chip->dev_conn.endpoint[0] = "rt1711h";
+		chip->dev_conn.endpoint[1] = dev_conn_end;
+		chip->dev_conn.id = "usb-role-switch";
+		device_connection_add(&chip->dev_conn);
+	}
+
 	chip->data.init = rt1711h_init;
 	chip->data.set_vconn = rt1711h_set_vconn;
 	chip->data.start_drp_toggling = rt1711h_start_drp_toggling;
@@ -279,6 +291,9 @@ static int rt1711h_remove(struct i2c_client *client)
 	struct rt1711h_chip *chip = i2c_get_clientdata(client);
 
 	tcpci_unregister_port(chip->tcpci);
+	if (chip->dev_conn.id)
+		device_connection_remove(&chip->dev_conn);
+
 	return 0;
 }
 
-- 
2.15.0-rc2