NAME
gpiolock —
support for multi-position
keylocks attached to GPIO pins
SYNOPSIS
gpiolock* at gpio? offset ? mask ?
gpiolock* at gpio?
DESCRIPTION
The
gpiolock driver allows connecting of multi-position
keylocks over GPIO pins. The keylock driver registers with an in-kernel
keylock supporting system and provides
kauth(9) support through an
experimental security model. The keylock state can be queried using the
hw.keylock sysctl variables. Only locks with 2-4 positions are currently
supported. The pin number is specified in the kernel configuration with the
offset locator. The
mask locator
denotes the pins used for the lock (minimum 2, maximum 4 pins are used). The
offset and
mask can also be
specified when
gpiolock is attached at runtime using the
GPIOATTACH
ioctl(2) on the
gpio(4) device.
SEE ALSO
gpio(4),
intro(4)
HISTORY
The
gpiolock driver first appeared in
NetBSD
6.0.
AUTHORS
The
gpiolock driver was written by
Marc
Balmer
<
marc@msys.ch>.