linux-kernel - Re: [PATCH v3] gpio: pl061: Fix the issue failed to register the ACPI interrtupion

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Message-ID: <CACRpkdZMHqppyzVQCLSR8yv1owZ71eDAduL9JGkCawjFvZ2U+A@mail.gmail.com>
Date:   Tue, 20 Aug 2019 12:26:51 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Thierry Reding <treding@...dia.com>, Wei Xu <xuwei5@...ilicon.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Linuxarm <linuxarm@...wei.com>,
        Shameerali Kolothum Thodi 
        <shameerali.kolothum.thodi@...wei.com>,
        Jonathan Cameron <jonathan.cameron@...wei.com>,
        John Garry <john.garry@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        Shiju Jose <shiju.jose@...wei.com>, jinying@...ilicon.com,
        Zhangyi ac <zhangyi.ac@...wei.com>,
        "Liguozhu (Kenneth)" <liguozhu@...ilicon.com>,
        Tangkunshan <tangkunshan@...wei.com>,
        huangdaode <huangdaode@...ilicon.com>
Subject: Re: [PATCH v3] gpio: pl061: Fix the issue failed to register the ACPI interrtupion

On Tue, Aug 20, 2019 at 10:51 AM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
> On Tue, Aug 20, 2019 at 10:12 AM Linus Walleij <linus.walleij@...aro.org> wrote:
> > On Mon, Aug 19, 2019 at 5:07 PM Andy Shevchenko
> > <andy.shevchenko@...il.com> wrote:

> > Exactly what do you refer to when you want me to
> > "re-do the approach for IRQ handling"? Do you mean
> > this driver or are you referring to:
> >
> > commit e0d89728981393b7d694bd3419b7794b9882c92d
> > Author: Thierry Reding <treding@...dia.com>
> > Date:   Tue Nov 7 19:15:54 2017 +0100
> >
> >     gpio: Implement tighter IRQ chip integration
> >
> >     Currently GPIO drivers are required to add the GPIO chip and its
> >     corresponding IRQ chip separately, which can result in a lot of
> >     boilerplate. Use the newly introduced struct gpio_irq_chip, embedded in
> >     struct gpio_chip, that drivers can fill in if they want the GPIO core
> >     to automatically register the IRQ chip associated with a GPIO chip.
> >
> >     Signed-off-by: Thierry Reding <treding@...dia.com>
> >     Acked-by: Grygorii Strashko <grygorii.strashko@...com>
> >     Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
>
> Yes.

OK let's fix this mess, it shouldn't be too hard, I've sent a first
few patches.

> > The problem comes from the problem/mess I am trying to
> > clean up in the first place. So if the new way of registering GPIO
> > irqchips is not working for ACPI, then we have to fix that instead
> > of reverting all attempts to use the new API IMO.
>
> Sorry for me being impatient and asking for a groundless requests.
> I'll help you with cleaning this.

Sorry if I sounded harsh :( I just have a bit of panic.

I am sure we can fix this, I only recently realized what a headache
the new API is going to be if I can't straighten it out and have to
keep the old stuff around forever in parallel.

Yours,
Linus Walleij