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

[Andy Shevchenko]

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@xxxxxxxxx> 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
> 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).

What do you need from ACPI exactly? The ACPI namespace in the OS is represented
by set of ACPI handles, each of which is the object pointing out to some object
in it. Any object in ACPI has a unique path. At any time, after parsing the
ACPI table(s) into ACPI namespace we may get a handle based on the path.

-- 
With Best Regards,
Andy Shevchenko