The power domains are a property of / implemented in the PMU. As such,
they should be modelled as child nodes of the PMU.

Signed-off-by: André Draszik <andre.draszik@linaro.org>

---
Note: Ideally, the newly added properties (ranges, etc.) should only be
'required' if "^power-domain@[0-9a-f]+$" exists as a patternProperty,
as they're needed only in that case. As-is, this patch now causes
warnings for existing DTs as they don't specify the new properties (and
they shouldn't need to). Only if DTs are updated to include
power-domains, such an update should also add the new properties.

I've not been able to come up with the correct schema syntax to achieve
that. dependencies, dependentRequired, and dependentSchemas don't seem
to support patterns. Similarly,
  - if:
      required:
        - ...
    then:
      required:
        - ...

doesn't allow patterns in the 'if' block (or I didn't get the syntax
right).
---
 .../bindings/soc/google/google,gs101-pmu.yaml      | 42 +++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/soc/google/google,gs101-pmu.yaml

b/Documentation/devicetree/bindings/soc/google/google,gs101-pmu.yaml
index 209ee2f80d449c3eec568188898b3c6f7ae0ddd4..d18a351b649c0736662e67bb64de46afa01e399a 100644

--- a/Documentation/devicetree/bindings/soc/google/google,gs101-pmu.yaml
+++ b/Documentation/devicetree/bindings/soc/google/google,gs101-pmu.yaml

@@ -27,6 +27,14 @@ properties:

   reg:
     maxItems: 1
 
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+  ranges: true
+
   reboot-mode:
     $ref: /schemas/power/reset/syscon-reboot-mode.yaml
     type: object

@@ -50,18 +58,50 @@ properties:

     description:
       Phandle to PMU interrupt generation interface.
 
+patternProperties:
+  "^power-domain@[0-9a-f]+$":
+    type: object
+    description: Child node describing one power domain within the PMU
+
+    additionalProperties: true
+
+    properties:
+      compatible:
+        const: google,gs101-pd
+
 required:
   - compatible
   - reg
+  - '#address-cells'
+  - '#size-cells'
+  - ranges
   - google,pmu-intr-gen-syscon
 
-unevaluatedProperties: false
+additionalProperties: false