linux-kernel - Re: [PATCH v2 4/5] ARM: dts: Add support for emtrion emCON-MX6 series

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Message-ID: <CAL_JsqKKwDmq953x+0SnZ_u4T5kXyQza9rnEOzyyomSTmf7Hqw@mail.gmail.com>
Date:   Tue, 26 Dec 2017 11:16:34 -0600
From:   Rob Herring <robh@...nel.org>
To:     Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:     Andreas Färber <afaerber@...e.de>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Türk, Jan <Jan.Tuerk@...rion.de>,
        Mark Rutland <mark.rutland@....com>,
        Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Russell King <linux@...linux.org.uk>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Kevin Hilman <khilman@...libre.com>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        SZ Lin <sz.lin@...a.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        LinuxArmKernelMailingListe <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 4/5] ARM: dts: Add support for emtrion emCON-MX6 series

On Fri, Dec 22, 2017 at 4:56 AM, Alexandre Belloni
<alexandre.belloni@...e-electrons.com> wrote:
> + Philippe
>
> On 22/12/2017 at 11:43:33 +0100, Andreas Färber wrote:
>> >> I'll change it for v3 of this patch however it will end up like this:
>> >> //SPDX-License...
>> >
>> > That should be /* SPDX-License */, // is for c files.
>>
>> Got any reference for that? Since we're using the C preprocessor before
>> feeding them to dtc, we can use the same // style for both, builds fine.
>>
>> Only for my private DT overlay files that I use directly with dtc I
>> couldn't adopt that style.

We are well past the point of being able to build most dts files with just dtc.

> The doc states:
>
> If a specific tool cannot handle the standard comment style, then the
> appropriate comment mechanism which the tool accepts shall be used. This
> is the reason for having the "/\* \*/" style comment in C header
> files.
>
> I interpreted that as dtc doesn't handle // comments, use /**/

It's been so long, I'd forgotten that. Perhaps we should fix dtc to
handle // comments.

>
> But I agree it also states:
> .dts{i}:          // SPDX-License-Identifier: <SPDX License Expression>

Or we could still change this. The guidelines aren't merged yet.

Rob