Re: [PATCH] software node: allow referencing software nodes by name

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

On Wed, Mar 25, 2026 at 05:32:06PM +0100, Bartosz Golaszewski wrote:
> On Tue, Mar 24, 2026 at 8:30 PM Dmitry Torokhov
> <dmitry.torokhov@gmail.com> wrote:
> >
> > Please post the reworked version so we can review all the details. My
> > concern was that it relies on notifier chains to notify when devices
> > get registered and unregistered, and instead of matching node names you
> > now need to somehow match device instances and software node instances,
> > which again likely is done based on some name. This just piles on
> > complexity where a simpler solution would be sufficient.
> >
> 
> I will post it. Hopefully before the end of the week. I want to cover
> both OF nodes with paz00 as well as ACPI with android tablets. The

For paz00 I hope Tierry will pick up my patch converting rfkill-gpio
from board file to dts.

> latter case will have to wait for devices because there's no way to
> look up an ACPI node by name that I could idenfity (correct me if I'm
> wrong).
> 
> > I think this approach also will give trouble when there are multiple
> > users of GPIOs provided by the same gpiochip, in cases where users are
> > split across multiple modules.
> >
> 
> Do we have any such use-case? I haven't found any. If we do end up
> running into this corner-case, it can still be done by centralizing
> the software nodes in question. But maybe let's cross that bridge when
> (and if) we get to it.

Android-tablet could probably use it. The gpiochip software nodes are
already consolidated there but the code could be simplified if we could
simply use names/labels.

Thanks.

-- 
Dmitry