Forcing psm(4) probe w/o rebooting

[cpghost at cordula.ws]

Hello,

on a box that must not reboot, a user accidentally pulled the
PS/2 mouse connector. After reconnecting the mouse and restarting
moused, this still didn't restore the mouse, because the psm driver
replies with a:
  unable to open /dev/psm0: Device not configured.

How do I force psm driver to rescan and reinitialize the mouse,
WITHOUT rebooting that box?

Thanks,
-cpghost.

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