linux-kernel - Re: [PATCH v2 1/2] gpiolib: of: Prepare of_gpiochip_add() / of_gpiochip

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Message-ID: <CAMRc=MeL=K3BEW+-G-Z49Sw1Z5CCSnbQxbS9qDyizWa7nQjDiw@mail.gmail.com>
Date:   Thu, 10 Nov 2022 16:29:12 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH v2 1/2] gpiolib: of: Prepare of_gpiochip_add() /
 of_gpiochip_remove() for fwnode

On Thu, Nov 10, 2022 at 2:53 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> On Thu, Nov 10, 2022 at 02:22:40PM +0100, Thierry Reding wrote:
> > On Tue, Nov 08, 2022 at 03:38:52PM +0200, Andy Shevchenko wrote:
>
> ...
>
> > > +   np = to_of_node(chip->fwnode);
> >
> > This breaks a number of GPIO controllers on Tegra where chip->fwnode
> > ends up never getting set. I also see this break drivers like the MFD-
> > based gpio-max77620, so I don't think this is anything specific to the
> > Tegra drivers.
> >
> > Looking at how fwnode handling works, it seems like we're checking the
> > wrong value here, since chip->fwnode is only for explicit overrides of
> > the fwnode value.
> >
> > The below patch fixes the regression for me:
>
> Thank you! Can you submit it as a formal fix? (Also see below)
> Of if Bart prefers I can respin fixed verison. Bart?
>

Let's have a fix on top of your changes. Thierry: can you send the
patch to the list?

Bart