Re: [PATCH v2 4/7] of: property: fw_devlink: Follow PWM nexus maps

[Herve Codina]

Hi Ernest,

On Thu, 10 Sep 2026 16:16:45 +0200
Ernest Van Hoecke <ernestvanhoecke@xxxxxxxxx> wrote:

> From: Ernest Van Hoecke <ernest.vanhoecke@xxxxxxxxxxx>
> 
> PWM consumers use of_parse_phandle_with_args_map() to resolve specifiers
> through pwm-map properties. fw_devlink instead parses the pwms property
> as a direct phandle reference, so it records the nexus node as the
> supplier rather than the mapped PWM provider.
> 
> A nexus is a translation node, not the PWM 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 pwms so fw_devlink resolves the same
> provider as the PWM consumer API. Direct PWM references continue to work
> because the map-aware parser returns the original provider when no
> pwm-map property is present.
> 
> Fixes: e71e46a6f19c ("pwm: Add support for pwm nexus dt bindings")
> 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>
> ---
>  drivers/of/property.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 

Reviewed-by: Herve Codina <herve.codina@xxxxxxxxxxx>

Best regards,
Hervé