Intel EP80579 Global Configuration Unit
gcu* at pci?
driver provides access to the miibus
that is hidden behind the GCU device. It is used to control PHYs on embedded
designs utilizing Intel's EP80579 chips.
The GCU also provides access to CAN, SSP and TDM signal strength drivers, but
since they are not supported by OpenBSD
does not provide any functionality related to them.
Intel's EP80579 Datasheet:
driver first appeared in
driver was written by
partially based on the FreeBSD
driver released by
Intel under the ISC license.