usb_of_get_companion_dev
EXPORT_SYMBOL_GPL(usb_of_get_companion_dev);
usb3->host_dev = usb_of_get_companion_dev(&pdev->dev);
companion_dev = usb_of_get_companion_dev(hcd->self.controller);
companion_dev = usb_of_get_companion_dev(hcd->self.controller);
struct device *usb_of_get_companion_dev(struct device *dev);