itesio —
ITE IT87xxF Super I/O driver
itesio0 at isa? port 0x2e
itesio1 at isa? port 0x4e
The itesio driver provides support for the Environment
  Controller and the Watchdog Timer on the IT87xxF Super I/Os, and may be used
  to monitor hardware sensors or setting up a watchdog timeout value for the
  system.
The itesio driver has 15 sensors:
The itesio Watchdog Timer is configurable
    via the wdogctl(8) utility
    and has a resolution between 1 and 65535 seconds. The Watchdog Timer is not
    supported on the IT8705 Super I/O.
The itesio driver first appeared in
  OpenBSD 3.4 and was then ported to
  NetBSD 4.0.
Interrupt support is unimplemented.