We need a way to generate and return the Type-C port device names. For example, it is going to be used by the DRM to provide PATH property for DisplayPort connectors.
Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org> --- drivers/usb/typec/class.c | 14 ++++++++++++++ include/linux/usb/typec.h | 2 ++ 2 files changed, 16 insertions(+) diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index 9c1dbf3c00e0..7394a2ecef6f 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -2327,6 +2327,20 @@ void typec_unregister_port(struct typec_port *port) } EXPORT_SYMBOL_GPL(typec_unregister_port); +/** + * typec_port_get_name - Get USB Type-C Port name + * @port: The port to describe + * + * Returns a name of the passed USB Type-C port on success or NULL when the + * port has not been enumerated yet. The resulting string should be freed by + * the caller. + */ +char *typec_port_get_name(struct typec_port *port) +{ + return kasprintf(GFP_KERNEL, "typec:%s", dev_name(&port->dev)); +} +EXPORT_SYMBOL_GPL(typec_port_get_name); + static int __init typec_init(void) { int ret; diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h index 8fa781207970..4aa9c9378383 100644 --- a/include/linux/usb/typec.h +++ b/include/linux/usb/typec.h @@ -303,6 +303,8 @@ struct typec_plug *typec_register_plug(struct typec_cable *cable, struct typec_plug_desc *desc); void typec_unregister_plug(struct typec_plug *plug); +char *typec_port_get_name(struct typec_port *port); + void typec_set_data_role(struct typec_port *port, enum typec_data_role role); void typec_set_pwr_role(struct typec_port *port, enum typec_role role); void typec_set_vconn_role(struct typec_port *port, enum typec_role role); -- 2.39.2