=> usb start
starting USB...
Bus usb@48890000: Register 2000140 NbrPorts 2
Starting the controller
USB XHCI 1.00
Bus usb@48890000: Device 'usb@48890000': seq 0 is in use by 'usb@48890000'
Register 2000140 NbrPorts 2
Starting the controller
USB XHCI 1.00
Bus usb@488d0000: Device 'usb@488d0000': seq 1 is in use by 'usb@48890000'
Register 2000140 NbrPorts 2
Starting the controller
USB XHCI 1.00
scanning bus usb@48890000 for devices... 1 USB Device(s) found
scanning bus usb@48890000 for devices... 1 USB Device(s) found
scanning bus usb@488d0000 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found