pxaip —
Intel Xscale PXA250/PXA270 GPIO Controller
pxagpio* at pxaip?
gpio* at gpiobus?
pxaip is an on-board GPIO controller found in XScale
  PXA250, PXA255, PXA270, PXA271, PXA272, and PXA273 processors manufactured by
  Intel and Marvell Technology. The driver supports 86 pins for PXA250 or 121
  pins for PXA270 processor families. Access to the pins is provided by the
  gpio(4) interface. The driver
  supports GPIO_PIN_INPUT and
  GPIO_PIN_OUTPUT. GPIO pins being used in alternate
  configurations are not available for GPIO operations.
The pxaip driver first appeared in
  NetBSD 2.0. GPIO attachment appeared in
  NetBSD 8.0.
The pxaip driver was written by Steve
  Woodford
  <scw@NetBSD.org>. This
  manual page was contributed by Stephan Meisinger.