Subject: Re: [PATCH v2 0/9] soc: remove direct accesses to of_root from drivers/soc/

From: Rob Herring <[email-masked]>
Date: Tue, 24 Feb 2026 12:38:32 -0600

On Mon, Feb 23, 2026 at 02:37:15PM +0100, Bartosz Golaszewski wrote:
> 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 new OF helpers for reading the machine compatible and
> model strings, 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: first two patches should be either acked by Rob or
> picked up into an immutable branch based on v7.0-rc1, the rest can go
> through the SoC tree.

SoC tree is good.

> 
> Signed-off-by: Bartosz Golaszewski <[email-masked]>
> ---
> Changes in v2:
> - rename of_machine_get_compatible() to of_machine_read_compatible() and
>   add the index argument
> - add a stub for of_machine_read_compatible() for !CONFIG_OF
> - provide of_machine_read_model() to avoid having to look-up the root
>   node via of_find_node_by_path("/")
> - rename soc_device_get_machine() to soc_attr_read_machine() before
>   making it an exported symbol
> - Link to v1: https://lore.kernel.org/r/[email-masked]
> 
> ---
> Bartosz Golaszewski (9):
>       of: provide of_machine_read_compatible()
>       of: provide of_machine_read_model()
>       base: soc: order includes alphabetically
>       base: soc: rename and 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

For all but patch 8,

Reviewed-by: Rob Herring (Arm) <[email-masked]>