linux-kernel - [PATCH v4 1/3] dt-bindings: thermal: samsung: Adjust '#thermal-sensor-cells' to 1

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Message-ID: <20250922041857.1107445-2-shin.son@samsung.com>
Date: Mon, 22 Sep 2025 13:18:55 +0900
From: Shin Son <shin.son@...sung.com>
To: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>, Krzysztof Kozlowski
	<krzk@...nel.org>, "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>, Conor Dooley
	<conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>, Henrik Grimler
	<henrik@...mler.se>
Cc: Shin Son <shin.son@...sung.com>, linux-pm@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 1/3] dt-bindings: thermal: samsung: Adjust
 '#thermal-sensor-cells' to 1

The ExynosAuto v920 SoC includes multiple TMU instances; each instance
monitors a subset of the SoC's up to 16 hardware thermal sensors.

Additionally, add myself to the bindings' maintainers list, as I plan
to actively work on the exynosautov920 TMU support and handle further
updates in this area.

Signed-off-by: Shin Son <shin.son@...sung.com>
---
 .../thermal/samsung,exynos-thermal.yaml       | 32 ++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/thermal/samsung,exynos-thermal.yaml b/Documentation/devicetree/bindings/thermal/samsung,exynos-thermal.yaml
index 29a08b0729ee..f9b399a7b82f 100644
--- a/Documentation/devicetree/bindings/thermal/samsung,exynos-thermal.yaml
+++ b/Documentation/devicetree/bindings/thermal/samsung,exynos-thermal.yaml
@@ -8,6 +8,7 @@ title: Samsung Exynos SoC Thermal Management Unit (TMU)
 
 maintainers:
   - Krzysztof Kozlowski <krzk@...nel.org>
+  - Shin Son <shin.son@...sung.com>
 
 description: |
   For multi-instance tmu each instance should have an alias correctly numbered
@@ -27,6 +28,7 @@ properties:
       - samsung,exynos5420-tmu-ext-triminfo
       - samsung,exynos5433-tmu
       - samsung,exynos7-tmu
+      - samsung,exynosautov920-tmu
 
   clocks:
     minItems: 1
@@ -62,11 +64,17 @@ properties:
     minItems: 1
 
   '#thermal-sensor-cells':
-    const: 0
+    enum: [0, 1]
 
   vtmu-supply:
     description: The regulator node supplying voltage to TMU.
 
+  samsung,sensors:
+    description: Number of thermal sensors monitored by this TMU instance.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 15
+
 required:
   - compatible
   - clocks
@@ -97,6 +105,8 @@ allOf:
         reg:
           minItems: 2
           maxItems: 2
+        '#thermal-sensor-cells':
+          const: 0
   - if:
       properties:
         compatible:
@@ -119,6 +129,8 @@ allOf:
         reg:
           minItems: 1
           maxItems: 1
+        '#thermal-sensor-cells':
+          const: 0
 
   - if:
       properties:
@@ -139,6 +151,24 @@ allOf:
         reg:
           minItems: 1
           maxItems: 1
+        '#thermal-sensor-cells':
+          const: 0
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynosautov920-tmu
+    then:
+      properties:
+        clocks:
+          minItems: 1
+          maxItems: 1
+        reg:
+          minItems: 1
+          maxItems: 1
+        '#thermal-sensor-cells':
+          const: 1
 
 additionalProperties: false
 
-- 
2.50.1