Re: [PATCH v8 06/17] dt-bindings: mfd: amd,pensando-elbasr: Add AMD Pensando Elba System Resource chip

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Hi Krzysztof,

On 01/02/2023 10:57, Krzysztof Kozlowski wrote:
>On 30/01/2023 20:12, Brad Larson wrote:
...
>> This has been changed to one device and four chip selects. This binding error
>> is occuring for snps,dw-apb-ssi.yaml using reg for the chip selects.  Any
>> guidance on how to fix? 
>> 
>> $ make ARCH=arm64 dtbs_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
>>   LINT    Documentation/devicetree/bindings
>>   CHKDT   Documentation/devicetree/bindings/processed-schema.json
>>   SCHEMA  Documentation/devicetree/bindings/processed-schema.json
>>   DTC_CHK arch/arm64/boot/dts/amd/elba-asic.dtb
>> /home/brad/linux.v10/arch/arm64/boot/dts/amd/elba-asic.dtb: spi@2800: system-controller@0:reg: [[0], [1], [2], [3]] is too long
>> 	From schema: /home/brad/linux.v10/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
>
> Maybe this would work in snps,dw-apb-ssi for children:
>
> reg:
>   items:
>     minimum: 0
>     maximum: 3

With the above change here in snps,dw-apb-ssi.yaml:

  - if:
      properties:
        compatible:
          contains:
            const: amd,pensando-elba-spi
    then:
      properties:
        reg:
          items:
            minimum: 0
            maximum: 3
      required:
        - amd,pensando-elba-syscon
    else:
      properties:
        amd,pensando-elba-syscon: false

this is the result:

$ make ARCH=arm64 dtbs_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
  LINT    Documentation/devicetree/bindings
  CHKDT   Documentation/devicetree/bindings/processed-schema.json
  SCHEMA  Documentation/devicetree/bindings/processed-schema.json
  DTC_CHK arch/arm64/boot/dts/amd/elba-asic.dtb
/home/brad/linux.v10/arch/arm64/boot/dts/amd/elba-asic.dtb: spi@2800: reg:0: [0, 10240, 0, 256] is too long
	From schema: /home/brad/linux.v10/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
/home/brad/linux.v10/arch/arm64/boot/dts/amd/elba-asic.dtb: spi@2800: system-controller@0:reg: [[0], [1], [2], [3]] is too long
	From schema: /home/brad/linux.v10/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml

The binding snps,dw-apb-ssi.yaml has patternProperties defined this way:

patternProperties:
  "^.*@[0-9a-f]+$":
    type: object
    properties:
      reg:
        minimum: 0
        maximum: 3

- Removing patternProperties makes the error go away indicating an issue with minimum/maximum regex check
and the number of items in the reg property which shouldn't be related.

- Changing patternProperties to this makes the error go away.
patternProperties:
  "^.*@[0-9a-f]+$":
    type: object
    properties:
      reg:
        maxItems: 4

- Using spmi.yaml as a reference and changing patternProperties to the following:
patternProperties:
  "^.*@[0-9a-f]+$":
    type: object
    properties:
      reg:
        items:
          - maxItems: 4
            items:
              - minimum: 0
              - maximum: 3
    required:
      - reg

results in:

$ make ARCH=arm64 dtbs_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
arch/arm64/Makefile:36: Detected assembler with broken .inst; disassembly will be unreliable
  LINT    Documentation/devicetree/bindings
  CHKDT   Documentation/devicetree/bindings/processed-schema.json
/home/brad/linux.v10/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml: patternProperties:^.*@[0-9a-f]+$:properties:reg:items: 'oneOf' conditional failed, one must be fixed:
	[{'maxItems': 4, 'items': [{'minimum': 0}, {'maximum': 3}]}] is not of type 'object'
	{'maxItems': 4, 'items': [{'minimum': 0}, {'maximum': 3}]} should not be valid under {'required': ['maxItems']}
		hint: "maxItems" is not needed with an "items" list
	from schema $id: http://devicetree.org/meta-schemas/keywords.yaml#
  SCHEMA  Documentation/devicetree/bindings/processed-schema.json
  DTC_CHK arch/arm64/boot/dts/amd/elba-asic.dtb


- With this version for patternProperties, to retain minimum/maximum, the original error occurs:
patternProperties:
  "^.*@[0-9a-f]+$":
    type: object
    properties:
      reg:
        items:
          - minItems: 1
            items:
              - minimum: 0
              - maximum: 3
    required:
      - reg

$ make ARCH=arm64 dtbs_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
arch/arm64/Makefile:36: Detected assembler with broken .inst; disassembly will be unreliable
  LINT    Documentation/devicetree/bindings
  CHKDT   Documentation/devicetree/bindings/processed-schema.json
  SCHEMA  Documentation/devicetree/bindings/processed-schema.json

  DTC_CHK arch/arm64/boot/dts/amd/elba-asic.dtb
/home/brad/linux.v10/arch/arm64/boot/dts/amd/elba-asic.dtb: spi@2800: system-controller@0:reg: [[0], [1], [2], [3]] is too long
	From schema: /home/brad/linux.v10/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml

Regards,
Brad



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