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GPIOSIM(4)                   Device Drivers Manual                  GPIOSIM(4)

NAME
     gpiosim - General Purpose Input/Output Simulator

SYNOPSIS
     pseudo-device gpiosim

DESCRIPTION
     The gpiosim pseudo-device simulates a 64-bit wide gpio(4) device.  The
     state of the simulated device can be manipulated through the sysctl(8)
     interface.  For this purpose, access the "hw.gpiosim<N>.value" sysctl(8)
     variable, where "<N>" denotes the number of the gpiosim instance.

     Both edge and level interrupts are simulated.  The "hw.gpiosim<N>.ms"
     sysctl(8) variable will change the amount of time between callout(9)
     ticks for simulated level interrupts.

SEE ALSO
     gpio(4), gpioirq(4), sysctl(8)

AUTHORS
     The gpiosim driver was written by Marc Balmer <marc@msys.ch> Simulated
     interrupts added by Brad Spencer <brad@anduin.eldar.org>.

NetBSD 10.99                   November 8, 2013                   NetBSD 10.99