[PATCH 05/33] gpio: add generic single-register fixed-direction GPIO driver

Russell King - ARM Linux
2016-09-04T20:18:30Z

On Sun, Sep 04, 2016 at 09:04:59PM +0200, Robert Jarzmik wrote:
> And retested with my 3 patches on top of it. Everything works fine :
> - CF insertion is correctly detected now !
> - AT/2 keyboard interrupts fire, keys are there, etc ...
> - the AT/2 warning is now gone
>
> The pxa_cplds_irqs patch will make it work as before, better than today for
> sure. I think edge type interrupts (such as sa1111), if they come close enough,
> might be lost with the current implementation, but anyway, that's for another
> time.

Good news, but I suspect CF probably isn't working as it should do (see
my reply to the clock alias patch.)

> There is one patch in my serie that I left up to you, as I wasn't very sure
> about the accuracy of my commit message, nor been able to write down all the
> requirements implied on sa1111 with this additional test.

That's basically what I have here at the moment, but since I made the
suggestion, I've been thinking about moving it into the IRQ
initialisation instead.

Also, I think it's a genirq problem that you can install a chained
handler on an interrupt without a registered chip - and then when an
irq chip comes along later, the IRQ isn't unmasked. We should either
not allow a chained handler to be installed in that situation, /or/
we should unmask chained IRQs when the chip comes along later.

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