CVS commit: src/sys

["Manuel Bouyer" <bouyer%netbsd.org@localhost>]

Module Name:    src
Committed By:   bouyer
Date:           Wed May 11 18:33:40 UTC 2016

Modified Files:
        src/sys/arch/arm/allwinner: awin_gpio.c awin_io.c awin_reg.h
        src/sys/dev/gpio: gpio.c gpiovar.h

Log Message:
As proposed in
http://mail-index.netbsd.org/tech-kern/2016/04/28/msg020504.html
add gpio interrupt support to the gpio framework, and an implementation
for the allwinner gpio backend (tested on A20 only).
gpio(4) has new public functions:
- gpio_intr() called by backends when an interrupt condition for
  a gpio pin is present
- gpio_find_device() and gpio_get_name(), support functions for
  gpio(4) users, wich respectively returns a void * cookie for a gpio device
  given its name, and returns the name given the cookie.
- gpio_pin_ctl_intr(), which is used to configure interrupts on a gpio pin and
  registers a callback.
- gpio_pin_irqen(), which is used to mask/unmask interrupts on a pin.

Nothing in the NetBSD tree uses this yet, but I have a i2c driver
(at https://github.com/mbouyer/marine_chartplotter/tree/master/software/NetBSD/driver) which uses it.


To generate a diff of this commit:
cvs rdiff -u -r1.20 -r1.21 src/sys/arch/arm/allwinner/awin_gpio.c
cvs rdiff -u -r1.45 -r1.46 src/sys/arch/arm/allwinner/awin_io.c
cvs rdiff -u -r1.88 -r1.89 src/sys/arch/arm/allwinner/awin_reg.h
cvs rdiff -u -r1.57 -r1.58 src/sys/dev/gpio/gpio.c
cvs rdiff -u -r1.15 -r1.16 src/sys/dev/gpio/gpiovar.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.