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Subject[PATCH 08/10] usb: typec: Add support for usb role switch in rt1711h driver
Date
This patch add struct device_connection to rt1711h driver to support
find "usb-role-switch" in tcpm_register_port.

Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Lucas Tsai <lucas_tsai@richtek.com>
Cc: shufan_lee <shufan_lee@richtek.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Binghui Wang <wangbinghui@hisilicon.com>
Signed-off-by: Yu Chen <chenyu56@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
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