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

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Date:   Fri, 22 Dec 2017 12:44:26 +0100
From:   Türk, Jan <Jan.Tuerk@...rion.de>
To:     'Alexandre Belloni' <alexandre.belloni@...e-electrons.com>,
        Andreas Färber <afaerber@...e.de>,
        Philippe Ombredanne <pombredanne@...b.com>
CC:     'Rob Herring' <robh@...nel.org>,
        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: AW: [PATCH v2 4/5] ARM: dts: Add support for emtrion emCON-MX6
 series

 Hi,

> 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.
> >
> 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 /**/
> 
> But I agree it also states:
> .dts{i}:	  // SPDX-License-Identifier: <SPDX License Expression>
> 
> So I think we will end up with a mix of both.
> 
after some regexp on arch/arm/boot/dts, the current state is:
216 SPDX identifiers total
	184 by GregKH in b24413180f5600bcb3bb70fbed5cf186b60864bd starting with //
	2 times /*  also by GregKH in the commit above (in .h files)
	27 occurrences of  "* SPDX"

However, the de-facto comment style in the arm devicetrees seems to be /* */
So with the current information I would prepare v3 with:

// SPDX-License-Identifier
/* Copyright-text + Header
*/
[...]

Jan

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