linux-kernel - Re: [PATCH 2/2] gpio: mxc: switch to dynamic allocat GPIO base

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Message-ID: <CAMRc=MfBDBrd1C9tOUcu_+eocB-xXt26fBDLSUNFyos2d6E15w@mail.gmail.com>
Date:   Mon, 21 Aug 2023 14:17:48 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Alexander Stein <alexander.stein@...tq-group.com>,
        Bough Chen <haibo.chen@....com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>,
        "christophe.leroy@...roup.eu" <christophe.leroy@...roup.eu>
Subject: Re: [PATCH 2/2] gpio: mxc: switch to dynamic allocat GPIO base

On Mon, Aug 21, 2023 at 12:21 PM Linus Walleij <linus.walleij@...aro.org> wrote:
>
> On Mon, Aug 21, 2023 at 9:44 AM Alexander Stein
> <alexander.stein@...tq-group.com> wrote:
> > Am Montag, 21. August 2023, 09:25:54 CEST schrieb Linus Walleij:
> > > On Mon, Aug 21, 2023 at 4:47 AM Bough Chen <haibo.chen@....com> wrote:> > Hi
> > Linus and Bartosz,
> > > >
> > > > For this patch, still not in the main trunk (Linux 6.5-rc7) and
> > > > linux-next(next-20230818). Can you help apply or any comment?
> > >
> > > As pointed out by Bartosz you cannot just mechanically switch the base
> > > to -1.
> > >
> > > You also need to convince us that this doesn't break any systems, and if
> > > it does, fix them so they don't break before submitting this patch.
> >
> > I think it's hard to tell if something breaks, this driver is used in a lot of
> > boards. AFAIR some people are relying on the assumption of fixed order. Using
> > dynamic allocation this not ensured. A possible fix is to use aliases [1].
>
> Hm I might have been to grumpy!
>
> It looks like any boardfiles using gpio-mxc have been eliminated
> so this driver is now only used in device tree-boots? Right?
>
> Then I feel a lot better about it.
>
> Acked-by: Linus Walleij <linus.walleij@...aro.org>
>
> Yours,
> Linus Walleij

I will not be queueing it for v6.6 as merge window opens in a week, I
want to give it more time in next and see if anyone complains so it'll
make it for v6.7.

Bart