Install software:

opkg update
opkg install usbreset
root@Arduino:~# usbreset
  usbreset PPPP:VVVV - reset by product and vendor id
  usbreset BBB/DDD   - reset by bus and device number
  usbreset "Product" - reset by product name

  Number 001/001  ID 1d6b:0002  Generic Platform EHCI Controller
  Number 001/002  ID 058f:6254  USB2.0Hub
  Number 001/003  ID 05e3:0606  USB2.0 Hub
  Number 001/005  ID 0d8c:000c  C-Media USB Headphone Set
  Number 001/004  ID 058f:6366  Mass Storage Device