linux-kernel - [PATCH 02/10] dt-bindings: soc: samsung: exynos-pmu: allow power domains as child on g101

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Message-Id: <20251006-gs101-pd-v1-2-f0cb0c01ea7b@linaro.org>
Date: Mon, 06 Oct 2025 17:43:28 +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>
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 02/10] dt-bindings: soc: samsung: exynos-pmu: allow power
 domains as child on g101

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

Update the example while at it.

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/samsung/exynos-pmu.yaml           | 53 +++++++++++++++++++++-
 1 file changed, 52 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml b/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml
index f0fb24156da9b8980dcfd5339ae75f12a71cf6d6..c2db1cbb969a9a6fea5208dc2990f2144fa480e6 100644
--- a/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml
+++ b/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml
@@ -93,6 +93,14 @@ properties:
     minItems: 1
     maxItems: 32
 
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+  ranges: true
+
   dp-phy:
     $ref: /schemas/phy/samsung,dp-video-phy.yaml
     unevaluatedProperties: false
@@ -138,7 +146,7 @@ required:
   - compatible
   - reg
 
-additionalProperties: false
+unevaluatedProperties: false
 
 allOf:
   - if:
@@ -201,10 +209,27 @@ allOf:
             enum:
               - google,gs101-pmu
     then:
+      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:
+        - '#address-cells'
+        - '#size-cells'
+        - ranges
         - google,pmu-intr-gen-syscon
     else:
       properties:
+        '#address-cells': false
+        '#size-cells': false
+        ranges: false
         google,pmu-intr-gen-syscon: false
 
 examples:
@@ -231,3 +256,29 @@ examples:
             #phy-cells = <1>;
         };
     };
+
+  - |
+    system-controller@...60000 {
+        compatible = "google,gs101-pmu", "syscon";
+        reg = <0x17460000 0x10000>;
+        ranges;
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        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";
+        };
+    };

-- 
2.51.0.618.g983fd99d29-goog