usb_phy_roothub_power_on
retval = usb_phy_roothub_power_on(hcd->phy_roothub);
EXPORT_SYMBOL_GPL(usb_phy_roothub_power_on);
err = usb_phy_roothub_power_on(phy_roothub);
int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub);