linux-kernel - [PATCH v2 03/10] dt-bindings: soc: samsung: gs101-pmu: allow power domains as children

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Message-Id: <20251009-gs101-pd-v2-3-3f4a6db2af39@linaro.org>
Date: Thu, 09 Oct 2025 16:25:05 +0100
From: André Draszik <andre.draszik@...aro.org>
To: Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, Rob Herring <robh@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Ulf Hansson <ulf.hansson@...aro.org>, 
 Marek Szyprowski <m.szyprowski@...sung.com>
Cc: Peter Griffin <peter.griffin@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Will McVicker <willmcvicker@...gle.com>, kernel-team@...roid.com, 
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-pm@...r.kernel.org, 
 André Draszik <andre.draszik@...aro.org>
Subject: [PATCH v2 03/10] dt-bindings: soc: samsung: gs101-pmu: allow power
 domains as children

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@...aro.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
 
 examples:
   - |
     system-controller@...60000 {
         compatible = "google,gs101-pmu", "syscon";
         reg = <0x17460000 0x10000>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
 
         google,pmu-intr-gen-syscon = <&pmu_intr_gen>;
+
+        pd_g3d: power-domain@...0 {
+            compatible = "google,gs101-pd";
+            reg = <0x1e00 0x80>;
+            #power-domain-cells = <0>;
+            label = "g3d";
+        };
+
+        power-domain@...0 {
+            compatible = "google,gs101-pd";
+            reg = <0x2000 0x80>;
+            #power-domain-cells = <0>;
+            power-domains = <&pd_g3d>;
+            label = "embedded_g3d";
+        };
     };

-- 
2.51.0.710.ga91ca5db03-goog