linux-kernel - RE: [PATCH] gpio: dwapb: Add support for 32 interrupts

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Date:   Tue, 10 Apr 2018 14:23:07 +0000
From:   Phil Edworthy <phil.edworthy@...esas.com>
To:     Rob Herring <robh@...nel.org>
CC:     Hoan Tran <hotran@....com>,
        Linus Walleij <linus.walleij@...aro.org>,
        "Mark Rutland" <mark.rutland@....com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Michel Pollet <michel.pollet@...renesas.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] gpio: dwapb: Add support for 32 interrupts

Hi Rob,

On 10 April 2018 07:24 Phil Edworthy wrote:
> On 09 April 2018 20:20 Rob Herring wrote:
> > On Wed, Mar 28, 2018 at 03:22:30PM +0100, Phil Edworthy wrote:
[...]
> > > +- interrupt-mask : a 32-bit bit mask that specifies which interrupts
> > > +in the list
> > > +  of interrupts is valid, bit is 1 for a valid irq.
> >
> > This is not a standard property and would need a vendor prefix. However,
> I'd
> > prefer you just skip any not connected interrupts with an invalid interrupt
> > number. Then the GPIO number is the index into "interrupts".
> Makes sense, I'll rework it to do this.
Err, what would an invalid interrupt number be?
If I use -1, I get a DT parsing error and 0 is certainly valid. If the number is
larger than the valid interrupt range I get errors during probe.

Thanks
Phil