Re: [PATCH v2 1/7] of: property: fw_devlink: Follow GPIO nexus maps

[Linus Walleij]

On Thu, Sep 10, 2026 at 4:16 PM Ernest Van Hoecke
<ernestvanhoecke@xxxxxxxxx> wrote:

> From: Ernest Van Hoecke <ernest.vanhoecke@xxxxxxxxxxx>
>
> GPIO consumers use of_parse_phandle_with_args_map() to resolve
> specifiers through gpio-map properties. fw_devlink instead parses GPIO
> properties as direct phandle references, so it records the nexus node as
> the supplier rather than the mapped GPIO provider.
>
> A nexus is a translation node, not the GPIO provider, and need not be
> populated as a device. The resulting fwnode link can therefore remain
> unresolved and indefinitely defer the consumer while
> device_links_check_suppliers() waits for the nexus.
>
> Use the map-aware parser for all supported GPIO property spellings. This
> makes fw_devlink resolve the same provider as the GPIO consumer API.
> Direct GPIO references continue to work because the map-aware parser
> returns the original provider when no gpio-map property is present.
>
> Fixes: 7f00be96f125 ("of: property: Add device link support for interrupt-parent, dmas and -gpio(s)")
> Reported-by: Leonardo Costa <leonardo.costa@xxxxxxxxxxx>
> Link: https://lore.kernel.org/all/juuc4af7ndbajcl7gzf4tg5qz2q2j5tt3rvql4jbauradujrre@gc5nbdhhixaf/
> Tested-by: Leonardo Costa <leonardo.costa@xxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@xxxxxxxxxxx>

Reviewed-by: Linus Walleij <linusw@xxxxxxxxxx>

Yours,
Linus Walleij