linux-kernel - Re: [PATCH V7 4/6] kbuild: Add support to build overlays (%.dtbo)

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Date:   Sat, 6 Feb 2021 18:28:06 +1100
From:   David Gibson <david@...son.dropbear.id.au>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Frank Rowand <frowand.list@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        anmar.oueja@...aro.org, Bill Mills <bill.mills@...aro.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-kbuild <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH V7 4/6] kbuild: Add support to build overlays (%.dtbo)

On Fri, Feb 05, 2021 at 02:55:07PM +0530, Viresh Kumar wrote:
> On 05-02-21, 10:02, Geert Uytterhoeven wrote:
> > Hi Viresh,
> > 
> > Thanks for your patch
> > (which I only noticed because it appeared in dt-rh/for-next ;-)
> > 
> > On Fri, Jan 29, 2021 at 8:31 AM Viresh Kumar <viresh.kumar@...aro.org> wrote:
> > > Add support for building DT overlays (%.dtbo). The overlay's source file
> > > will have the usual extension, i.e. .dts, though the blob will have
> > 
> > Why use .dts and not .dtso for overlays?
> > Because you originally (until v5) had a single rule for building .dtb
> > and .dtbo files?
> 
> I am fine with doing that as well if Rob and David agree to it. Rob
> did suggest that at one point but we didn't do much about it later on
> for some reason.
> 
> FWIW, this will also require a change in the DTC compiler.

Not really.  It would need a change to automatically recognize that
extension, but you can easily work around that by explicitly giving
the -I option to specify the input type.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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