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Message-ID: <20170515142641.GU22219@n2100.armlinux.org.uk>
Date:   Mon, 15 May 2017 15:26:42 +0100
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     Olof Johansson <olof@...om.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Mikael Starvik <starvik@...s.com>,
        Jesper Nilsson <jesper.nilsson@...s.com>,
        James Hogan <james.hogan@...tec.com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Frank Rowand <frowand.list@...il.com>,
        linux-arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH] devicetree: Move include prefixes from arch to separate
 directory

On Mon, May 15, 2017 at 08:01:07AM -0500, Rob Herring wrote:
> I'd prefer not to mix things in scripts/dtc that aren't the import of
> dtc (yes, we do have a few other things already, but they are at least
> scripts). Couldn't this go in include/dt-bindings/ instead?

I don't think that works.

The include path used is "include", which means that we force people
to use:

#include <dt-bindings/foo.dtsi>

in their DT files.  This means that we'd need to populate $topdir/include
with per-architecture symlinks on top of the 26 or so directories already
there, so that:

#include <arch/foo.dtsi>

would work.  That's quite horrible, since $topdir/include is the main
include path for C headers.

I guess we could have symlinks inside include/dt-bindings, but that
makes the includes:

#include <dt-bindings/arch/foo.dtsi>

but that's rather absurd because these _aren't_ dt-binding definitions.

Maybe what we should do is:

mkdir include/dt
git mv include/dt-bindings include/dt
for arch in arch/*; do
  dts=$arch/boot/dts
  if [ -d $dts ]; then
     a=include/dt/$(basename $arch)
     ln -s $dts $a
     git add $a
  fi
done
... fixup scripts/Makefile.lib ...
git commit

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.

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