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

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Message-ID: <OSBPR01MB1766927B331E6011CE7AEDDCF5BD0@OSBPR01MB1766.jpnprd01.prod.outlook.com>
Date:   Wed, 11 Apr 2018 10:17:51 +0000
From:   Phil Edworthy <phil.edworthy@...esas.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
CC:     Hoan Tran <hotran@....com>,
        Linus Walleij <linus.walleij@...aro.org>,
        "Rob Herring" <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "Michel Pollet" <michel.pollet@...renesas.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] gpio: dwapb: Add support for 32 interrupts

Hi Andy,

On 05 April 2018 10:43, Phil Edworthy wrote:
> On 30 March 2018 22:26 Andy Shevchenko wrote:
> > On Wed, Mar 28, 2018 at 5:22 PM, Phil Edworthy wrote:
> > > The DesignWare GPIO IP can be configured for either 1 or 32
> > > interrupts,
> >
> > 1 to 32, or just a choice between two?
> Just a choice of 1 or 32.
Sorry, I was wrong about this... the manual does not say 1 or 32. It says:
"Port A can be configured to generate multiple interrupt signals or
a single combined interrupt flag. When set to 1, the component generates a
single combined interrupt flag."

There is no other text describing this option, but I believe all GPIOs on
port A will have an interrupt. In our case we have 32 GPIOs on port A
and 32 interrupts connected to them.

Thanks
Phil