linux-kernel - [PATCH v5 02/10] dt-bindings: power: samsung: add google,gs101-pd

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Message-Id: <20260205-gs101-pd-v5-2-ede49cdb57a6@linaro.org>
Date: Thu, 05 Feb 2026 21:42:30 +0000
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>, Liam Girdwood <lgirdwood@...il.com>, 
 Mark Brown <broonie@...nel.org>
Cc: Peter Griffin <peter.griffin@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, Juan Yescas <jyescas@...gle.com>, 
 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 v5 02/10] dt-bindings: power: samsung: add google,gs101-pd

Add support for the Google gs101 version of the Exynos power domains. A
new compatible is needed because register fields have changed and
because power domain operations involve interfacing with the TrustZone
protection control on newer Exynos SoCs.

Power domains can also have a power supply linked to them, so add
optional support for that, too. It is believed that all (existing)
platforms could benefit from this, hence it's not being limited to
gs101-pd.

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

---
v5:
- add domain-supply and update commit message

v4:
- add new vendor property samsung,dtzpc
- drop previous tags due to that
---
 .../devicetree/bindings/power/pd-samsung.yaml      | 33 ++++++++++++++++++++--
 1 file changed, 30 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/power/pd-samsung.yaml b/Documentation/devicetree/bindings/power/pd-samsung.yaml
index 9c2c51133457112ca0098c043e123f0a02fa1291..3f1a2dc178625f8cfdbb913d0c7cb5b2519fe477 100644
--- a/Documentation/devicetree/bindings/power/pd-samsung.yaml
+++ b/Documentation/devicetree/bindings/power/pd-samsung.yaml
@@ -13,12 +13,10 @@ description: |+
   Exynos processors include support for multiple power domains which are used
   to gate power to one or more peripherals on the processor.
 
-allOf:
-  - $ref: power-domain.yaml#
-
 properties:
   compatible:
     enum:
+      - google,gs101-pd
       - samsung,exynos4210-pd
       - samsung,exynos5433-pd
 
@@ -33,6 +31,9 @@ properties:
     deprecated: true
     maxItems: 1
 
+  domain-supply:
+    description: domain regulator supply.
+
   label:
     description:
       Human readable string with domain name. Will be visible in userspace
@@ -44,11 +45,28 @@ properties:
   power-domains:
     maxItems: 1
 
+  samsung,dtzpc:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Distributed TrustZone Protection Control (DTZPC) node.
+
 required:
   - compatible
   - "#power-domain-cells"
   - reg
 
+allOf:
+  - $ref: power-domain.yaml#
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              const: google,gs101-pd
+    then:
+      properties:
+        samsung,dtzpc: false
+
 unevaluatedProperties: false
 
 examples:
@@ -66,3 +84,12 @@ examples:
         #power-domain-cells = <0>;
         label = "MFC";
     };
+
+    power-domain@...0 {
+        compatible = "google,gs101-pd";
+        reg = <0x2080 0x80>;
+        #power-domain-cells = <0>;
+        label = "hsi0";
+        domain-supply = <&ldo7m>;
+        samsung,dtzpc = <&dtzpc_hsi0>;
+    };

-- 
2.53.0.rc2.204.g2597b5adb4-goog