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

[Yu Chen]

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

Cc: Heikki Krogerus <heikki.kroge...@linux.intel.com>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Lucas Tsai <lucas_t...@richtek.com>
Cc: shufan_lee <shufan_...@richtek.com>
Cc: John Stultz <john.stu...@linaro.org>
Cc: Binghui Wang <wangbing...@hisilicon.com>
Signed-off-by: Yu Chen <cheny...@huawei.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