Re: [PATCH 2/9] dt-bindings: Arm: Extend FF-A binding to support in-kernel usage of partitions

Rob Herring
2020-09-02T21:38:27Z

On Sat, 29 Aug 2020 18:09:16 +0100, Sudeep Holla wrote:
> Since the FF-A v1.0 specification doesn't list the UUID of all the
> partitions in the discovery API, we need to specify the UUID of the
> partitions that need to be accessed by drivers within the kernel.
>
> This extends the binding to provide the list of partitions that kernel
> drivers may need to access and are not part of the partitions managed
> by the hypervisor.
>
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> ---
> .../devicetree/bindings/arm/arm,ffa.yaml | 34 +++++++++++++++++--
> 1 file changed, 32 insertions(+), 2 deletions(-)
>
> Hi,
>
> I am sure this is incomplete, but I couldn't figure out how to make all
> the child properties optional if it is not managed by hypervisor.
>
> Moreover, if we don't like the idea of adding UUID of all the partitions
> that in-kernel drivers may need to communicate to, one alternative I can
> think of is to allow the creation of FFA device from the FFA driver
> itself.
>
> Regards,
> Sudeep
>

My bot found errors running 'make dt_binding_check' on your patch:

Traceback (most recent call last):
File "/usr/local/bin/dt-extract-example", line 45, in <module>
binding = yaml.load(open(args.yamlfile, encoding='utf-8').read())
File "/usr/local/lib/python3.8/dist-packages/ruamel/yaml/main.py", line 343, in load
return constructor.get_single_data()
File "/usr/local/lib/python3.8/dist-packages/ruamel/yaml/constructor.py", line 111, in get_single_data
node = self.composer.get_single_node()
File "_ruamel_yaml.pyx", line 706, in _ruamel_yaml.CParser.get_single_node
File "_ruamel_yaml.pyx", line 724, in _ruamel_yaml.CParser._compose_document
File "_ruamel_yaml.pyx", line 775, in _ruamel_yaml.CParser._compose_node
File "_ruamel_yaml.pyx", line 889, in _ruamel_yaml.CParser._compose_mapping_node
File "_ruamel_yaml.pyx", line 773, in _ruamel_yaml.CParser._compose_node
File "_ruamel_yaml.pyx", line 850, in _ruamel_yaml.CParser._compose_sequence_node
File "_ruamel_yaml.pyx", line 775, in _ruamel_yaml.CParser._compose_node
File "_ruamel_yaml.pyx", line 889, in _ruamel_yaml.CParser._compose_mapping_node
File "_ruamel_yaml.pyx", line 775, in _ruamel_yaml.CParser._compose_node
File "_ruamel_yaml.pyx", line 889, in _ruamel_yaml.CParser._compose_mapping_node
File "_ruamel_yaml.pyx", line 731, in _ruamel_yaml.CParser._compose_node
File "_ruamel_yaml.pyx", line 904, in _ruamel_yaml.CParser._parse_next_event
ruamel.yaml.scanner.ScannerError: while scanning for the next token
found character that cannot start any token
in "<unicode string>", line 98, column 1
make[1]: *** [Documentation/devicetree/bindings/Makefile:18: Documentation/devicetree/bindings/arm/arm,ffa.example.dts] Error 1
make[1]: *** Deleting file 'Documentation/devicetree/bindings/arm/arm,ffa.example.dts'
make[1]: *** Waiting for unfinished jobs....
./Documentation/devicetree/bindings/arm/arm,ffa.yaml: while scanning for the next token
found character that cannot start any token
in "<unicode string>", line 98, column 1
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/arm/arm,ffa.yaml: ignoring, error parsing file
warning: no schema found in file: ./Documentation/devicetree/bindings/arm/arm,ffa.yaml
make: *** [Makefile:1366: dt_binding_check] Error 2

See https://patchwork.ozlabs.org/patch/1353741

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure dt-schema is up to date:

pip3 install git+https://github.com/devicetree-org/dt-schema.git@master --upgrade

Please check and re-submit.