CVS log for src/sys/dev/gpio/gpioirq.c

Up to [cvs.NetBSD.org] / src / sys / dev / gpio

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Keyword substitution: kv
Default branch: MAIN

fix various typos in comments and log messages.

Pull up following revision(s) (requested by brad in ticket #464):
	sys/dev/gpio/gpioirq.c: revision 1.3
For /dev/ reads against gpioirq(4) implement the following:
o O_NONBLOCK on reads
o Add a d_poll function and associated sel[init|notify|record|destroy]
  calls to the driver so that select(2) and poll(2) work as expected.
With these in place async use cases work against /dev/gpioirqN

Pull up following revision(s) (requested by brad in ticket #461):
	sys/dev/gpio/gpiovar.h: revision 1.19
	share/man/man4/gpioirq.4: revision 1.4 via patch
	sys/dev/gpio/gpio.c: revision 1.73
	etc/MAKEDEV.tmpl: revision 1.234
	sys/conf/majors: revision 1.103
	sys/dev/gpio/gpioirq.c: revision 1.2
gpioirq(4) version 2
This update makes this driver more than just an example and allows for:
o More than one pin to be attached to a gpioirq instance.  That is,
  the mask parameter can be greater than 0x01 now.
o A /dev/gpioirqN device that allows GPIO pin interrupts to be
  transported into userland.  This is a device that can be opened for
  reading with a simple fixed output indicating the device unit, pin
  number and current pin state.
This update was used as part of a physical intrusion detection system
where multiple switches (i.e. window magnetic reed switches and etc.)
are tied to a bunch of GPIO inputs with userland software that reacts
to the pins changing state.

For /dev/ reads against gpioirq(4) implement the following:

o O_NONBLOCK on reads

o Add a d_poll function and associated sel[init|notify|record|destroy]
  calls to the driver so that select(2) and poll(2) work as expected.


With these in place async use cases work against /dev/gpioirqN

gpioirq(4) version 2

This update makes this driver more than just an example and allows for:

o More than one pin to be attached to a gpioirq instance.  That is,
  the mask parameter can be greater than 0x01 now.

o A /dev/gpioirqN device that allows GPIO pin interrupts to be
  transported into userland.  This is a device that can be opened for
  reading with a simple fixed output indicating the device unit, pin
  number and current pin state.


This update was used as part of a physical intrusion detection system
where multiple switches (i.e. window magnetic reed switches and etc.)
are tied to a bunch of GPIO inputs with userland software that reacts
to the pins changing state.

Sync with HEAD

file gpioirq.c was added on branch pgoyette-compat on 2018-05-21 04:36:05 +0000

Add an example "gpioirq" driver that demonstrates interrupts on GPIO
pins.  Will be enhanced in the future to support sending events to
user space on edge-triggered interrupt events.

Based on initial work by Brad Spencer.
PR kern/51676