linux-kernel - Re: [PATCH 1/1] auxdisplay: Add I2C gpio expander example

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Date:   Wed, 19 May 2021 11:53:51 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Ralf Schlatterbeck <rsc@...tux.com>
Cc:     Rob Herring <robh@...nel.org>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Willy Tarreau <w@....eu>, Lars Poeschel <poeschel@...onage.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH 1/1] auxdisplay: Add I2C gpio expander example

Hi Ralf,

On Wed, May 19, 2021 at 11:00 AM Ralf Schlatterbeck <rsc@...tux.com> wrote:
> On Mon, May 17, 2021 at 10:20:35AM -0500, Rob Herring wrote:
> > Now it warns in linux-next:
> >
> > Documentation/devicetree/bindings/auxdisplay/hit,hd44780.example.dts:52.18-62.11: Warning (unit_address_vs_reg): /example-1/i2c@...0: node has a unit name, but no reg or ranges property
>
> [I'm the author of that patch]
> Can someone point me to the documentation of how to check a single
> example against the dt schemata? I think I had that figured out how to
> run the dt-checks over the whole tree in january but didn't bother with
> warnings since the whole devtree was riddled with warnings at the time.

It's much better in v5.13-rc2.

> Docs on how to quickly check for warnings/errors would help me a lot. My
> naive usage of dt-validate on an example yields a traceback, I've opened
> a report on github because I think that even with gross mis-usage the
> tool shouldn't traceback...

make dt_binding_check
DT_SCHEMA_FILES=Documentation/devicetree/bindings/auxdisplay/hit,hd44780.yaml

That still runs some checks on all files, unless you apply
https://lore.kernel.org/linux-devicetree/20210309112148.2309116-1-geert+renesas@glider.be/
first

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds