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dt-bindings: writing-schema: Explain sub-nodes with additionalProperties:true

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Document recently introduced pattern of using additionalProperties: true
for sub-nodes with their own schema.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250331081345.37103-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
This commit is contained in:
Krzysztof Kozlowski
2025-03-31 10:13:45 +02:00
committed by Rob Herring (Arm)
parent 0af2f6be1b
commit af134b1145
2 changed files with 22 additions and 4 deletions
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11
Documentation/devicetree/bindings/writing-schema.rst
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@@ -117,9 +117,14 @@ additionalProperties / unevaluatedProperties
should be allowed.
* additionalProperties: true
Rare case, used for schemas implementing common set of properties. Such
schemas are supposed to be referenced by other schemas, which then use
'unevaluatedProperties: false'. Typically bus or common-part schemas.
- Top-level part:
Rare case, used for schemas implementing common set of properties. Such
schemas are supposed to be referenced by other schemas, which then use
'unevaluatedProperties: false'. Typically bus or common-part schemas.
- Nested node:
When listing only the expected compatible of the nested node and there
is an another schema matching that compatible which ends with one of
two above cases ('false').
examples
Optional. A list of one or more DTS hunks implementing this binding only.