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

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Message-ID: <20210519090047.e63d2im5vgskqpcs@runtux.com>
Date:   Wed, 19 May 2021 11:00:47 +0200
From:   Ralf Schlatterbeck <rsc@...tux.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        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

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.
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...

Thanks for your help and pointers.
Ralf
-- 
Dr. Ralf Schlatterbeck                  Tel:   +43/2243/26465-16
Open Source Consulting                  www:   www.runtux.com
Reichergasse 131, A-3411 Weidling       email: office@...tux.com