From: Frank Rowand <frowand.list@gmail.com>
To: "Rob Herring" <robh+dt@kernel.org>,
"Clément Léger" <clement.leger@bootlin.com>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Lizhi Hou <lizhi.hou@xilinx.com>,
Allan Nielsen <allan.nielsen@microchip.com>,
Horatiu Vultur <horatiu.vultur@microchip.com>,
Steen Hegelund <steen.hegelund@microchip.com>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: [PATCH v3 0/2] of: populate of_root_node if not set (alternate)
Date: Thu, 23 Feb 2023 15:34:16 -0600 [thread overview]
Message-ID: <20230223213418.891942-1-frowand.list@gmail.com> (raw)
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 adds support to
create this root node using a builtin dtb and removes the manual
creation of the root node done in unittests.c.
Changes since version 2: (patch 1/2)
- change of __dtb_empty_root_* from "void *" to "uint8_t []"
Changes since version 1: (patch 1/2)
- refresh for 6.2-rc1
- update Signed-off-by
- fix typo in of_fdt.h: s/of_setup/setup_of
- unflatten_device_tree(): validate size in header field dtb_empty_root
that will be used to copy dtb_empty_root
- add Kconfig option to manually select CONFIG_OF_EARLY_FLATTREE
Changes since version 1: (patch 2/2)
- refresh for 6.2-rc1
- update Signed-off-by
- fix formatting error (leading space) in patch comment
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/Kconfig | 7 ++++++-
drivers/of/Makefile | 2 +-
drivers/of/empty_root.dts | 6 ++++++
drivers/of/fdt.c | 27 ++++++++++++++++++++++++++-
drivers/of/unittest.c | 16 ++++++----------
include/linux/of_fdt.h | 2 ++
init/main.c | 2 ++
7 files changed, 49 insertions(+), 13 deletions(-)
create mode 100644 drivers/of/empty_root.dts
--
Frank Rowand <frowand.list@gmail.com>
next reply other threads:[~2023-02-23 21:34 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-23 21:34 Frank Rowand [this message]
2023-02-23 21:34 ` [PATCH v3 1/2] of: create of_root if no dtb provided Frank Rowand
2023-02-27 17:17 ` Rob Herring
2023-03-01 2:05 ` Frank Rowand
2023-03-01 3:00 ` Rob Herring
2023-03-01 16:49 ` Frank Rowand
2023-02-23 21:34 ` [PATCH v3 2/2] of: unittest: treat missing of_root as error instead of fixing up Frank Rowand
2023-02-23 21:39 ` [PATCH v3 0/2] of: populate of_root_node if not set (alternate) Frank Rowand
2023-02-27 9:31 ` Clément Léger
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