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From:   Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date:   Thu, 14 Apr 2022 17:32:14 +0200
Message-ID: <CAFBinCCCtZvdp+01DdEE=-f7rZ8V46O125wKDqE1muA645sdUg@mail.gmail.com>
Subject: Re: [PATCH v4 11/13] pinctrl: meson: Replace custom code by
 gpiochip_node_count() call
To:     Andy Shevchenko <andy.shevchenko@gmail.com>
Cc:     Marek Szyprowski <m.szyprowski@samsung.com>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Qianggui Song <qianggui.song@amlogic.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        Marc Zyngier <maz@kernel.org>,
        Fabien Dessenne <fabien.dessenne@foss.st.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
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Hi Andy,

On Thu, Apr 14, 2022 at 3:51 PM Andy Shevchenko
<andy.shevchenko@gmail.com> wrote:
[...]
> > This patch landed in linux next-20220413 as commit 88834c75cae5
> > ("pinctrl: meson: Replace custom code by gpiochip_node_count() call").
> > Unfortunately it breaks booting of all my Amlogic-based test boards
> > (Odroid C4, N2, Khadas VIM3, VIM3l). MMC driver is no longer probed and
> > boards are unable to mount rootfs. Reverting this patch on top of
> > linux-next fixes the issue.
>
> Thank you for letting me know, I'll withdraw it and investigate.
If needed I can investigate further later today/tomorrow. I think the
problem is that our node name doesn't follow the .dts recommendation.

For GXL (arch/arm64/boot/dts/amlogic/meson-gxl.dtsi) the GPIO
controller nodes are for example:
  gpio: bank@4b0 {
      ...
  }
and
  gpio_ao: bank@14 {
      ...
  }

See also:
$ git grep -C6 gpio-controller arch/arm64/boot/dts/amlogic/*.dtsi

Marek did not state which error he's getting but I suspect it fails
with "no gpio node found".


Best regards,
Martin