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From:   Andy Shevchenko <andy.shevchenko@gmail.com>
Date:   Thu, 11 May 2023 20:23:01 +0300
Message-ID: <CAHp75VeGMMOk0_C3E6hmg3Z06ARbN0tRLVFo5151bngFLDLSpw@mail.gmail.com>
Subject: Re: pca953x issue when driving a DSI bridge
To:     Jean-Michel Hautbois <jeanmichel.hautbois@yoseli.org>
Cc:     linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
        brgl@bgdev.pl, linus.walleij@linaro.org
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On Thu, May 11, 2023 at 7:07=E2=80=AFPM Jean-Michel Hautbois
<jeanmichel.hautbois@yoseli.org> wrote:
> On 11/05/2023 09:49, Andy Shevchenko wrote:
> > On Wed, May 10, 2023 at 11:18=E2=80=AFPM Jean-Michel Hautbois
> > <jeanmichel.hautbois@yoseli.org> wrote:
...

> > In your case I would try the easiest way (taking into account that
> > hardware connection is not preventing us from sleeping context), i.e.
> > check if the function that has GPIO call may sleep on its own and
> > simply replace gpiod_set_value() by gpiod_set_value_cansleep().
>
> And I found a patch, which is merged in v6.4-rc1 which does exactly this =
!
> https://lore.kernel.org/all/20230405135127.769665-1-alexander.stein@ew.tq=
-group.com/

Ah, cool!

> Thanks as it is your advice which made me find it :-p

You are welcome!

--=20
With Best Regards,
Andy Shevchenko