Re: [PATCH 1/2] dt-bindings: remoteproc: add AMD MicroBlaze binding

[Michal Simek]

On 4/15/26 08:50, Krzysztof Kozlowski wrote:
> On 15/04/2026 08:16, Michal Simek wrote:
> > On 4/14/26 19:53, Krzysztof Kozlowski wrote:
> > > On 14/04/2026 18:15, Ben Levinsky wrote:
> > >
> > > A nit, subject: drop second/last, redundant "binding". The "dt-bindings"
> > > prefix is already stating that these are bindings.
> > > See also:
> > > https://elixir.bootlin.com/linux/v6.17-rc3/source/Documentation/devicetree/bindings/submitting-patches.rst#L18
> > >
> > > > +---
> > > > +$id: http://devicetree.org/schemas/remoteproc/amd,microblaze.yaml#
> > > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > > +
> > > > +title: AMD MicroBlaze remote processor
> > > > +
> > > > +maintainers:
> > > > +  - Ben Levinsky <ben.levinsky@xxxxxxx>
> > > > +
> > > > +description:
> > > > +  MicroBlaze remote processor controlled by Linux through the remoteproc
> > > > +  framework.
> > >
> > > Describe hardware, not Linux frameworks. IOW, Linux framework is here
> > > irrelevant.
> > >
> > > > +
> > > > +  The executable firmware memory window is described in the
> > > > +  MicroBlaze-local address space by the node's reg property and translated
> > > > +  to the system physical address space with standard devicetree address
> > > > +  translation provided by the parent bus node's ranges property.
> > > > +
> > > > +properties:
> > > > +  $nodename:
> > > > +    pattern: "^remoteproc@[0-9a-f]+$"
> > > > +
> > > > +  compatible:
> > > > +    const: amd,microblaze
> > >
> > > microblaze is architecture, so this feels way too generic. You need SoC
> > > specific compatibles and I suggest do not reference architecture, but
> > > name or the function of the processor, if there are such.
> >
> > I have been arguing internally that I think when you look at driver itself it
> > can be pretty much generic loader for any firmware and doesn't really matter if
>
> Luckily I don't speak about driver :)

:-)

> > target subsystem is Microblaze/Risc-V/whatever based. And I was suggesting them
> > to use more generic name.
>
> So the binding is for drivers - generic loader? Then simply no. Not
> suitable for DT.
>
> > Because at the end of day reg property is pointing to location where firmware
> > should be loaded and gpio is a way how to start that subsystem and there is
> > nothing Microblaze specific.
> >
> > I can also imagine that the same driver could be extended with optional power
> > domain, power regulator and clock properties if there is a need to drive them
> > before subsystem gets out of reset.
> >
> > Does it make sense?
>
> Yes, drop from DT. No need for generic stuff. Or describe the hardware.

You need to describe that connection to HW. GPIOs, memory location, etc.
It means there must be any description.

Thanks,
Michal