gcscpcib —
AMD CS553[56] PCI-ISA bridge with timecounter, watchdog timer,
  and GPIO
gcscpcib* at pci? dev ? function ?
gpio* 	at gcscpcib?
isa* 	at gcscpcib?
The gcscpcib driver provides support for the AMD Geode
  CS5535 and CS5536 Companion chip. This device contains a number of components,
  including a PCI-ISA bridge. Besides the core functionality, the
  gcscpcib driver implements a 32-bit 3.5 MHz
  timecounter, a watchdog timer device, and a GPIO device. The watchdog timer
  may be configured via the
  wdogctl(8) utility and the
  GPIO pins can be manipulated via the
  gpioctl(8) utility.
The gcscpcib driver first appeared in
  OpenBSD 4.3 as glxpcib before
  being ported to NetBSD 5.0.
The gcscpcib driver was written by
  Michael Shalayeff and Yojiro
  UO. The GPIO parts were added by Marc Balmer
  <marc@msys.ch>.