linux-kernel - [PATCH 0/2] of: populate of_root

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Message-Id: <20220624034327.2542112-1-frowand.list@gmail.com>
Date:   Thu, 23 Jun 2022 22:43:25 -0500
From:   frowand.list@...il.com
To:     Rob Herring <robh+dt@...nel.org>,
        Clément Léger <clement.leger@...tlin.com>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lizhi Hou <lizhi.hou@...inx.com>,
        Allan Nielsen <allan.nielsen@...rochip.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>,
        Steen Hegelund <steen.hegelund@...rochip.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: [PATCH 0/2] of: populate of_root_node if not set (alternate)

From: Frank Rowand <frank.rowand@...y.com>

This series is a different implementation to achieve the goals of
https://lore.kernel.org/r/20220623105044.152832-1-clement.leger@bootlin.com

In order to apply overlays or create new nodes under the root node, the
kernel expects of_root to be set. On some system where a device-tree was
not provided by firmware (x86 for instance) if CONFIG_OF is enabled,
then we will end up with a null of_root. This series add support to
create this root node using a builtin dtb and remove the manual
creation of the root node done in unittests.c.

This series modifies init/main.c.  It was not clear to me whether
to add Linus to the distribution, or if the change should flow
through Rob.  (I did not add Linus.)

Frank Rowand (2):
  of: create of_root if no dtb provided
  of: unittest: treat missing of_root as error instead of fixing up

 drivers/of/Makefile    |  2 +-
 drivers/of/fdt.c       | 19 ++++++++++++++++++-
 drivers/of/unittest.c  | 16 ++++++----------
 include/linux/of_fdt.h |  2 ++
 init/main.c            |  2 ++
 5 files changed, 29 insertions(+), 12 deletions(-)

-- 
Frank Rowand <frank.rowand@...y.com>