Recommend psci node under firmware #134
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Add a recommendation to locate the /psci node of the Devicetree under the /firmware node. Add a note (to OSes' intention) that legacy systems did not do so, but rather located it under the root node /. Reported-by: Jon Humphreys <[email protected]> Suggested-by: Rob Herring <[email protected]> Signed-off-by: Vincent Stehlé <[email protected]>
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Hi @jto6, does this recommendation look fine for you, please? |
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Should the requirement be added to https://www.kernel.org/doc/Documentation/devicetree/bindings/arm/psci.yaml ?
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If you mean as schema constraints, we could have a schema for this recommendation (and /chosen ones), but it can't be in psci.yaml (other than as prose) as there is no way to define a node's location unless the schema starts in the root node. We could have a new one that's applied to the root node which disallows /psci and requires /firmware/psci (and also /chosen EBBR requirements). We don't have a distinction between recommended (or required only for new users) vs. required in dtschema. I'm somewhat hesitant to warn about this because that's the overwhelming majority of DTs right now. |
Add a recommendation to locate the /psci node of the Devicetree under the /firmware node.
Add a note (to OSes' intention) that legacy systems did not do so, but rather located it under the root node /.
This was originally reported by Jon as a limitation of Arm's certification tools.
Do we all find it acceptable to add recommendations on Devicetree in EBBR?