ryan@ryan-ThinkPad-X1-Carbon:~$ lsusb -t 
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M
    |__ Port 3: Dev 80, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 4: Dev 82, If 0, Class=Communications, Driver=, 480M
    |__ Port 4: Dev 82, If 1, Class=Communications, Driver=cdc_acm, 480M
    |__ Port 4: Dev 82, If 2, Class=CDC Data, Driver=cdc_acm, 480M
    |__ Port 4: Dev 82, If 3, Class=Communications, Driver=cdc_acm, 480M
    |__ Port 4: Dev 82, If 4, Class=CDC Data, Driver=cdc_acm, 480M
    |__ Port 4: Dev 82, If 5, Class=Communications, Driver=cdc_wdm, 480M
    |__ Port 4: Dev 82, If 6, Class=Communications, Driver=cdc_ncm, 480M
    |__ Port 4: Dev 82, If 7, Class=CDC Data, Driver=cdc_ncm, 480M
    |__ Port 4: Dev 82, If 8, Class=Communications, Driver=cdc_wdm, 480M
    |__ Port 4: Dev 82, If 9, Class=Communications, Driver=cdc_acm, 480M
    |__ Port 4: Dev 82, If 10, Class=CDC Data, Driver=cdc_acm, 480M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
        |__ Port 2: Dev 10, If 3, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 2: Dev 10, If 1, Class=Communications, Driver=cdc_acm, 12M
        |__ Port 2: Dev 10, If 4, Class=Vendor Specific Class, Driver=, 12M
        |__ Port 2: Dev 10, If 2, Class=CDC Data, Driver=cdc_acm, 12M
        |__ Port 2: Dev 10, If 0, Class=Mass Storage, Driver=usb-storage, 12M
        |__ Port 3: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M
        |__ Port 4: Dev 4, If 2, Class=Vendor Specific Class, Driver=btusb, 12M
        |__ Port 4: Dev 4, If 0, Class=Vendor Specific Class, Driver=btusb, 12M
        |__ Port 4: Dev 4, If 3, Class=Application Specific Interface, Driver=, 12M
        |__ Port 4: Dev 4, If 1, Class=Vendor Specific Class, Driver=btusb, 12M
        |__ Port 6: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M
        |__ Port 6: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M
ryan@ryan-ThinkPad-X1-Carbon:~$ find /dev/bus/usb -ls
      141      0 drwxr-xr-x   6 root     root          120 Apr 29 15:23 /dev/bus/usb
      148      0 drwxr-xr-x   2 root     root           60 Apr 29 15:23 /dev/bus/usb/004
      149      0 crw-rw-r--   1 root     root     189, 384 Apr 29 15:23 /dev/bus/usb/004/001
      146      0 drwxr-xr-x   2 root     root          100 May  5 13:12 /dev/bus/usb/003
      449      0 crw-rw-r--   1 root     root     189, 337 May  5 13:12 /dev/bus/usb/003/082
      337      0 crw-rw-r--   1 root     root     189, 335 May  5 13:12 /dev/bus/usb/003/080
      147      0 crw-rw-r--   1 root     root     189, 256 Apr 29 15:23 /dev/bus/usb/003/001
      144      0 drwxr-xr-x   2 root     root           80 Apr 29 15:23 /dev/bus/usb/002
      335      0 crw-rw-r--   1 root     root     189, 129 Apr 29 15:23 /dev/bus/usb/002/002
      145      0 crw-rw-r--   1 root     root     189, 128 Apr 29 15:23 /dev/bus/usb/002/001
      142      0 drwxr-xr-x   2 root     root          160 May  5 13:12 /dev/bus/usb/001
      576      0 crw-rw-r--   1 root     plugdev  189,   9 May  5 13:13 /dev/bus/usb/001/010
      425      0 crw-rw-r--   1 root     root     189,   4 Apr 29 15:23 /dev/bus/usb/001/005
      406      0 crw-rw-r--   1 root     root     189,   3 May  4 20:33 /dev/bus/usb/001/004
      398      0 crw-rw-r--   1 root     plugdev  189,   2 Apr 29 15:23 /dev/bus/usb/001/003
      333      0 crw-rw-r--   1 root     root     189,   1 Apr 29 15:23 /dev/bus/usb/001/002
      143      0 crw-rw-r--   1 root     root     189,   0 Apr 29 15:23 /dev/bus/usb/001/001