linux-kernel - Re: [PATCH V7 0/6] dt: build overlays

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Date:   Thu, 4 Feb 2021 09:58:59 -0600
From:   Rob Herring <robh@...nel.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
        David Gibson <david@...son.dropbear.id.au>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        anmar.oueja@...aro.org, linux-kernel@...r.kernel.org,
        Bill Mills <bill.mills@...aro.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Rob Herring <robh+dt@...nel.org>, linux-kbuild@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH V7 0/6] dt: build overlays

On Fri, 29 Jan 2021 12:54:04 +0530, Viresh Kumar wrote:
> Hi,
> 
> This patchset makes necessary changes to the kernel to add support for
> building overlays (%.dtbo) and the required fdtoverlay tool. This also
> builds static_test.dtb using most of the existing overlay tests present
> in drivers/of/unittest-data/ for better test coverage.
> 
> Note that in order for anyone to test this stuff, you need to manually
> run the ./update-dtc-source.sh script once to fetch the necessary
> changes from the external DTC project (i.e. fdtoverlay.c and this[1]
> patch).
> 
> I have tested this patchset for static and runtime testing (on Hikey
> board) and no issues were reported.
> 
> V7:
> - Add a comment in scripts/dtc/Makefile
> - Add Ack from Masahiro for patch 4/6.
> - Drop word "merge" from commit log of 2/6.
> - Split apply_static_overlay, static_test.dtb, and static_base.dts into
>   two parts to handle overlay_base.dts and testcases.dts separately.
> 
> V6:
> - Create separate rules for dtbo-s and separate entries in .gitignore in
>   4/6 (Masahiro).
> - A new file layout for handling all overlays for existing and new tests
>   5/6 (Frank).
> - Include overlay.dts as well now in 6/6 (Frank).
> 
> V5:
> 
> - Don't reuse DTC_SOURCE for fdtoverlay.c in patch 1/5 (Frank).
> 
> - Update .gitignore and scripts/Makefile.dtbinst, drop dtbo-y syntax and
>   DTC_FLAGS += -@ in patch 4/5 (Masahiro).
> 
> - Remove the intermediate dtb, rename output to static_test.dtb, don't
>   use overlay.dtb and overlay_base.dtb for static builds, improved
>   layout/comments in Makefile for patch 5/5 (Frank).
> 
> --
> Viresh
> 
> [1] https://github.com/dgibson/dtc/commit/163f0469bf2ed8b2fe5aa15bc796b93c70243ddc
> [2] https://lore.kernel.org/lkml/74f8aa8f-ffab-3b0f-186f-31fb7395ebbb@gmail.com/
> 
> Viresh Kumar (6):
>   scripts: dtc: Fetch fdtoverlay.c from external DTC project
>   scripts: dtc: Build fdtoverlay tool
>   scripts: dtc: Remove the unused fdtdump.c file
>   kbuild: Add support to build overlays (%.dtbo)
>   of: unittest: Create overlay_common.dtsi and testcases_common.dtsi
>   of: unittest: Statically apply overlays using fdtoverlay

I've applied the first 4 patches and did a dtc sync after patch 1.

Rob