Re: [PATCH v3] dt-bindings: pmem: Convert binding to YAML

[Drew Fustini]

On Mon, Jun 09, 2025 at 09:31:26AM -0500, Ira Weiny wrote:
> Dan Williams wrote:
> > [ add Ira ]
> > 
> > Drew Fustini wrote:
> > > Convert the PMEM device tree binding from text to YAML. This will allow
> > > device trees with pmem-region nodes to pass dtbs_check.
> > > 
> > > Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
> > > Acked-by: Oliver O'Halloran <oohall@xxxxxxxxx>
> > > Signed-off-by: Drew Fustini <drew@xxxxxxxx>
> > > ---
> > > Dan/Dave/Vishal: does it make sense for this pmem binding patch to go
> > > through the nvdimm tree?
> > 
> > Ira has been handling nvdimm pull requests as of late. Oliver's ack is
> > sufficient for me.
> > 
> > Acked-by: Dan Williams <dan.j.williams@xxxxxxxxx>
> > 
> > @Ira do you have anything else pending?
> > 
> 
> I don't.  I've never built the device tree make targets to test.
> 
> The docs[1] say to run make dtbs_check but it is failing:
> 
> $ make dtbs_check
> make[1]: *** No rule to make target 'dtbs_check'.  Stop.
> make: *** [Makefile:248: __sub-make] Error 2

I believe this is because the ARCH is set to x86 and I don't believe
dtbs_check is valid for that. I work on riscv which does use device tree
so I use this command:

make ARCH=riscv CROSS_COMPILE=riscv64-linux-gnu- dtbs_check


> 
> 
> dt_binding_check fails too.
> 
> $ make dt_binding_check
>   SCHEMA  Documentation/devicetree/bindings/processed-schema.json
> Traceback (most recent call last):
>   File "/usr/bin/dt-mk-schema", line 8, in <module>
>     sys.exit(main())
>              ~~~~^^
>   File "/usr/lib/python3.13/site-packages/dtschema/mk_schema.py", line 28, in main
>     schemas = dtschema.DTValidator(args.schemas).schemas
>               ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
>   File "/usr/lib/python3.13/site-packages/dtschema/validator.py", line 373, in __init__
>     self.make_property_type_cache()
>     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
>   File "/usr/lib/python3.13/site-packages/dtschema/validator.py", line 460, in make_property_type_cache
>     self.props, self.pat_props = get_prop_types(self.schemas)
>                                  ~~~~~~~~~~~~~~^^^^^^^^^^^^^^
>   File "/usr/lib/python3.13/site-packages/dtschema/validator.py", line 194, in get_prop_types
>     del props[r'^[a-z][a-z0-9\-]*$']
>         ~~~~~^^^^^^^^^^^^^^^^^^^^^^^
> KeyError: '^[a-z][a-z0-9\\-]*$'
> make[2]: *** [Documentation/devicetree/bindings/Makefile:63: Documentation/devicetree/bindings/processed-schema.json] Error 1
> make[2]: *** Deleting file 'Documentation/devicetree/bindings/processed-schema.json'
> make[1]: *** [/home/iweiny/dev/linux-nvdimm/Makefile:1522: dt_binding_schemas] Error 2
> make: *** [Makefile:248: __sub-make] Error 2
> 
> How do I test this?

dt_binding_check should work on x86. Maybe you don't have dtschema and
yamllint installed?

You should be able to install with:

pip3 install dtschema yamllint

And run the binding check with:

make dt_binding_check DT_SCHEMA_FILES=pmem-region.yaml

You should see the following output:

  SCHEMA  Documentation/devicetree/bindings/processed-schema.json
  CHKDT   ./Documentation/devicetree/bindings
  LINT    ./Documentation/devicetree/bindings
  DTEX    Documentation/devicetree/bindings/pmem/pmem-region.example.dts
  DTC [C] Documentation/devicetree/bindings/pmem/pmem-region.example.dtb

Thanks,
Drew