linux-kernel - Re: [PATCH v4 11/13] pinctrl: meson: Replace custom code by gpiochip_node

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Date:   Thu, 14 Apr 2022 17:32:14 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Qianggui Song <qianggui.song@...ogic.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Marc Zyngier <maz@...nel.org>,
        Fabien Dessenne <fabien.dessenne@...s.st.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        linux-amlogic <linux-amlogic@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux Samsung SOC <linux-samsung-soc@...r.kernel.org>,
        linux-stm32@...md-mailman.stormreply.com,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Philipp Zabel <p.zabel@...gutronix.de>
Subject: Re: [PATCH v4 11/13] pinctrl: meson: Replace custom code by
 gpiochip_node_count() call

Hi Andy,

On Thu, Apr 14, 2022 at 3:51 PM Andy Shevchenko
<andy.shevchenko@...il.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