1 struct usb_phy_roothub; 2 3 struct usb_phy_roothub *usb_phy_roothub_init(struct device *dev); 4 int usb_phy_roothub_exit(struct usb_phy_roothub *phy_roothub); 5 6 int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub); 7 void usb_phy_roothub_power_off(struct usb_phy_roothub *phy_roothub); 8