linux-kernel - Re: [PATCH 2/3] mfd: tqmx86: clear GPIO IRQ resource when no IRQ is set

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Date:   Wed, 31 Mar 2021 17:10:39 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Matthias Schiffer <matthias.schiffer@...tq-group.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Lee Jones <lee.jones@...aro.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] mfd: tqmx86: clear GPIO IRQ resource when no IRQ is set

On Wed, Mar 31, 2021 at 4:24 PM Matthias Schiffer
<matthias.schiffer@...tq-group.com> wrote:
> On Wed, 2021-03-31 at 15:35 +0300, Andy Shevchenko wrote:
> > On Wed, Mar 31, 2021 at 2:39 PM Matthias Schiffer
> > <matthias.schiffer@...tq-group.com> wrote:

...

> > > +               tqmx_gpio_resources[0].flags = 0;
> >
> > Please set IORESOURCE_DISABLED flag in the initial structure instead.
>
> Is there any documentation for the correct usage of this flag? I think
> I tried IORESOURCE_DISABLED originally, but it didn't have any effect
> (platform_get_irq() ignored the flag and returned the resource
> anyways). I might misremember though, I originally wrote the series
> some time ago.

It seems this flag is used solely for ACPI / PNP resources...
Hmm... I dunno how platorm_get_irq*() should respect this flag. You
see, that in the ACPI branch it has been checked there.

-- 
With Best Regards,
Andy Shevchenko