Re: [PATCH] gpio: swnode: remove deprecated lookup mechanism

[Linus Walleij]

On Mon, Jun 29, 2026 at 12:55 PM Bartosz Golaszewski
<bartosz.golaszewski@xxxxxxxxxxxxxxxx> wrote:

> GPIO software node lookup should rely exclusively on matching the
> addresses of the referenced firmware nodes. Commit e5d527be7e69 ("gpio:
> swnode: don't use the swnode's name as the key for GPIO lookup") tried to
> enforce this but had to be reverted: it broke existing users who abused
> the software node mechanism by creating "dummy" software nodes named
> after the device they want to get GPIOs from, without ever attaching them
> to the actual GPIO devices. Those users relied on GPIOLIB matching the
> label of the GPIO controller against the name of the software node rather
> than on a real firmware node link.
>
> All such users have now been coverted to using attached software nodes
> via the fwnode address lookup path and the kernel documentation has been
> updated to recommend it as the correct approach. This allows us to remove
> the old behavior.
>
> This will allow us to leverage the upcoming support for fw_devlink for
> software nodes in GPIO core.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>

Nice, I like it.
Reviewed-by: Linus Walleij <linusw@xxxxxxxxxx>

Yours,
Linus Walleij