usb_add_phy
err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2);
status = usb_add_phy(&fsl_otg_tc->phy, USB_PHY_TYPE_USB2);
err = usb_add_phy(&gpio_vbus->phy, USB_PHY_TYPE_USB2);
ret = usb_add_phy(&tu->phy, USB_PHY_TYPE_USB2);
EXPORT_SYMBOL_GPL(usb_add_phy);
extern int usb_add_phy(struct usb_phy *, enum usb_phy_type type);