Hi Rob,

Okay, I think you need something more like this that doesn't recurse 
infinitely:

patternProperties:
  "^power-domain@[0-9a-f]+$":
    $ref: #/$defs/power-domain-node

    unevaluatedProperties:
      $ref: #/$defs/power-domain-node

If you need a 3rd level of nodes:
      unevaluatedProperties:
        $ref: #/$defs/power-domain-node


Rob

After some test, your 1st suggestion works.

The infinite error is introduced from my changes and affect the result of power/renesas,sysc-
rmobile.yaml. The 'additionalProperties' being defined as a DT property is the root of this error.
After fix the indentation, the error is gone.

I'll update the yaml as your 1st suggestion in next version.

Thanks,
TingHan