Re: [PATCH v5 2/4] ACPI: of: match PRP0001 in of_match_device

[Rob Herring <robh@kernel.org>]

On Mon, Mar 30, 2026 at 07:04:21PM +0000, Markus Probst wrote:
> On Mon, 2026-03-30 at 09:00 +0200, Krzysztof Kozlowski wrote:
> > On Sun, Mar 29, 2026 at 08:02:16PM +0200, Markus Probst wrote:
> > > Export `acpi_of_match_device` function and use it to match for PRP0001
> > > in `of_match_device`, if the device does not have a device node.
> > > 
> > > This fixes the match data being NULL when using ACPI PRP0001, even though
> > > the device was matched against an of device table.
> > 
> > Fixes tag?
> > 
> > I don't see how this is going to fix !ACPI case - the
> > acpi_of_match_device() will just return false.
> While trying to argue I found out that there already is
> `device_get_match_data`, which takes PRP0001 into account.
> 
> I will now instead make a patch, which will make rust use this function
> instead of calling `of_match_device` and `acpi_match_device`
> individually, which ignores PRP0001.

IIRC, the rust binding already gives you the data pointer in probe.

> There are still a lot of drivers only using `of_match_device`, which
> makes it impossible to use PRP0001 with them. But this is not relevant
> for this driver.

Usually using of_match_device() in drivers is wrong. You generally just 
want the data pointer. There's a whole bunch of drivers still doing the 
old way.

Rob