Re: [PATCH 1/4] regmap: irq: Fix lost interrupts by introducing handle_reread

[Tony Lindgren]

* Mark Brown <broonie@xxxxxxxxxx> [170404 05:22]:
> On Mon, Apr 03, 2017 at 08:03:00PM -0700, Tony Lindgren wrote:
> 
> > So I'll drop the genirq/regmap_irq related hacks and resend just
> > the minimal MFD fixes. Similar misconfiguration may be the root
> > cause for other drivers too..
> 
> It is sadly far too common for people to implement interrupt controllers
> that only do edge triggers, I've no idea why even on what are supposed
> to be relatively high end SoCs.  It seems to be a hardware designer
> thing, AFAICT they think for something to be useful it needs to be a bit
> more complicated.

For edge only GPIO controllers handling level interrupts might be
somewhat fixable in software. The GPIO controller could have a loop
reading of the GPIO line status in the interrupt handler and comparing
it to the configured triggering.

Regards,

Tony