lsusb -t (hub + 3x rs232 + ups)

/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/3p, 480M
        |__ Port 1: Dev 3, If 0, Class=vend., Driver=smsc95xx, 480M
        |__ Port 3: Dev 4, If 0, Class=hub, Driver=hub/4p, 480M
            |__ Port 3: Dev 5, If 0, Class=hub, Driver=hub/4p, 480M
                |__ Port 3: Dev 6, If 0, Class=vend., Driver=ch341, 12M
                |__ Port 2: Dev 7, If 0, Class=vend., Driver=ch341, 12M
                |__ Port 4: Dev 9, If 0, Class=HID, Driver=usbhid, 1.5M
            |__ Port 1: Dev 8, If 0, Class=vend., Driver=ch341, 12M