Allwinner GPIO IRQ?

[Emmanuel Vadot]

On Tue, 1 Aug 2017 12:50:24 +0200
Milan Obuch <freebsd-arm at dino.sk> wrote:

> On Tue, 1 Aug 2017 08:19:21 +0200
> Emmanuel Vadot <manu at bidouilliste.com> wrote:
> 
> > On Mon, 31 Jul 2017 17:22:11 -0500
> > Dustin Marquess <dmarquess at gmail.com> wrote:
> > 
> > > Ian,
> > > 
> > > Thanks for the confirmation!  I'm not exactly a kernel-level dev,
> > > so I was just pretty much guessing and poking around :).
> > > 
> > > Thanks!
> > > -Dustin
> > >   
> > 
> >  As Ian said the controller driver doesn't support interrupts, this
> > would be easy to add but I have too much stuff to do so if someone
> > want to work on this I'll be very happy.
> > 
> 
> [ snip ]
> 
> I am interested in this, too, as I am just starting to try a gpiopps...
> 
> > > > From a quick glance at the docs, it looks like only 32 of the
> > > > pins on allwinner can be configured as interrupt sources, but it
> > > > doesn't look like our code is ready to do that at all (I don't
> > > > see any pins in the padconf tables that have "irq" as one of
> > > > their choices).  
> > 
> >  Yes, not all pins can be interrupts sources.
> >  I've added for most of the padconf information on which pins can do
> > it (see
> > https://svnweb.freebsd.org/base/head/sys/arm/allwinner/a20/a20_padconf.c?revision=310117&view=markup#l104
> > for example).
> >  They are named eint like in the datasheet and linux (so a dts that
> > would reference them on linux would work for us).
> > 
> 
> From a quick glance over this file I see there are both PC19 and PH10
> marked as eint12 - is it OK? Similarly PC20 and PH11, PC21 and PH12,
> PC22 and PH13. Also, Pins PI10 to PI19 are marked with eint. I did not
> try to read a datasheet, yet, so this could be dumb question, but
> still, I would like to know the reason...

 See http://dl.linux-sunxi.org/A20/A20%20User%20Manual%202013-03-22.pdf

 Multiple pins have the same function, depending on pinmuxing.
 I could have made a mistake (it happened before as I "parse" the
datasheet manually) but here it's correct :)

> Anyway, as I am working with Orange Pi boards, I think this is not
> relevant for me, I am looking in h3_padconf.c and h3_r_padconf.c, it
> looks like all pins from PA, PG and PL blocks are usable as interrupt
> source... and I see no such double usage here.
> 
> Regards,
> Milan

 Different SoC, different pinmux setting :)

-- 
Emmanuel Vadot <manu at bidouilliste.com> <manu at freebsd.org>