linux-kernel - [PATCH 0/8] soc: remove direct accesses to of

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Message-Id: <20260119-soc-of-root-v1-0-32a0fa9a78b4@oss.qualcomm.com>
Date: Mon, 19 Jan 2026 11:40:11 +0100
From: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
To: Rob Herring <robh@...nel.org>, Saravana Kannan <saravanak@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Danilo Krummrich <dakr@...nel.org>,
        "Christophe Leroy (CS GROUP)" <chleroy@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>, Chen-Yu Tsai <wens@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org,
        imx@...ts.linux.dev, linux-renesas-soc@...r.kernel.org,
        linux-sunxi@...ts.linux.dev,
        Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
Subject: [PATCH 0/8] soc: remove direct accesses to of_root from
 drivers/soc/

linux/of.h declares a set of variables providing addresses of certain
key OF nodes. The pointers being variables can't profit from stubs
provided for when CONFIG_OF is disabled which means that drivers
accessing these variables can't profit from CONFIG_COMPILE_TEST=y
coverage.

There are drivers under drivers/soc/ that access the of_root node. This
series introduces a new OF helper for reading the machine compatible
string, exports an existing SoC helper that reads the machine string
from the root node and finally replaces all direct accesses to of_root
with new or already existing helper functions.

Merging strategy: other than patch 1, everything else can go via the SoC
tree. I suggest Rob taking patch 1 for v7.0 through the OF tree and the
rest can be picked up after v7.0-rc1 is tagged.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
---
Bartosz Golaszewski (8):
      of: provide of_machine_get_compatible()
      base: soc: order includes alphabetically
      base: soc: export soc_device_get_machine()
      soc: fsl: guts: don't access of_root directly
      soc: imx8m: don't access of_root directly
      soc: imx9: don't access of_root directly
      soc: renesas: don't access of_root directly
      soc: sunxi: mbus: don't access of_root directly

 drivers/base/soc.c                | 26 ++++++++++++++------------
 drivers/of/base.c                 | 13 +++++++++++++
 drivers/soc/fsl/guts.c            | 12 +++---------
 drivers/soc/imx/soc-imx8m.c       | 11 +++--------
 drivers/soc/imx/soc-imx9.c        |  4 ++--
 drivers/soc/renesas/renesas-soc.c |  7 ++++++-
 drivers/soc/sunxi/sunxi_mbus.c    |  2 +-
 include/linux/of.h                |  2 ++
 include/linux/sys_soc.h           | 10 ++++++++++
 9 files changed, 54 insertions(+), 33 deletions(-)
---
base-commit: 46fe65a2c28ecf5df1a7475aba1f08ccf4c0ac1b
change-id: 20260119-soc-of-root-77c86c54010f

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>