linux-kernel - [PATCH 2/8] dt-bindings: firmware: google,gs101-acpm-ipc: Add TMU child node

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Message-Id: <20260114-acpm-tmu-v1-2-cfe56d93e90f@linaro.org>
Date: Wed, 14 Jan 2026 14:16:30 +0000
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: "Rafael J. Wysocki" <rafael@...nel.org>, 
 Daniel Lezcano <daniel.lezcano@...aro.org>, Zhang Rui <rui.zhang@...el.com>, 
 Lukasz Luba <lukasz.luba@....com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>, 
 Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, 
 Peter Griffin <peter.griffin@...aro.org>, 
 André Draszik <andre.draszik@...aro.org>, 
 Bartlomiej Zolnierkiewicz <bzolnier@...il.com>, Kees Cook <kees@...nel.org>, 
 "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: willmcvicker@...gle.com, jyescas@...gle.com, shin.son@...sung.com, 
 linux-pm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-samsung-soc@...r.kernel.org, linux-hardening@...r.kernel.org, 
 Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: [PATCH 2/8] dt-bindings: firmware: google,gs101-acpm-ipc: Add TMU
 child node

The Google GS101 Thermal Management Unit (TMU) is a child device of the
ACPM (Alive Clock and Power Manager) block, as it relies on the ACPM
protocol for configuration and initialization.

Update the ACPM binding to include the thermal-sensor child node.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
---
 .../bindings/firmware/google,gs101-acpm-ipc.yaml        | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/firmware/google,gs101-acpm-ipc.yaml b/Documentation/devicetree/bindings/firmware/google,gs101-acpm-ipc.yaml
index d3bca6088d128485618bb2b538ed8596b4ba14f0..4043a6453a9897b9e1d0e618489f79c19f32f247 100644
--- a/Documentation/devicetree/bindings/firmware/google,gs101-acpm-ipc.yaml
+++ b/Documentation/devicetree/bindings/firmware/google,gs101-acpm-ipc.yaml
@@ -52,6 +52,15 @@ properties:
       are used for passing messages to/from the ACPM firmware.
     maxItems: 1

+  thermal-sensor:
+    description: Child node describing a Thermal Management Unit instance.
+    type: object
+    additionalProperties: true
+
+    properties:
+      compatible:
+        const: google,gs101-tmu-top
+
 required:
   - compatible
   - "#clock-cells"
@@ -93,4 +102,12 @@ examples:
                 };
             };
         };
+
+        thermal-sensor {
+            compatible = "google,gs101-tmu-top";
+            clocks = <&cmu_misc 71>;
+            interrupts = <0 769 4 0>;
+            syscon = <&tmu_top_syscon>;
+            #thermal-sensor-cells = <1>;
+        };
     };

-- 
2.52.0.457.g6b5491de43-goog