linux-kernel - [PATCH 1/3] dt-bindings: thermal: samsung: Add tmu-name and sensor-index-ranges properties

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Message-ID: <20250825064929.188101-2-shin.son@samsung.com>
Date: Mon, 25 Aug 2025 15:49:27 +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>
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 1/3] dt-bindings: thermal: samsung: Add tmu-name and
 sensor-index-ranges properties

The exynosautov920 TMU requires per-sensor interrupt enablement
for its critical trip points.
Add two new DT properties to the Samsung thermal bindings
to support this requirement:

- **tmu-name**: an explicit identifier for each TMU,
		used to skip specific sensors
(e.g., sensor 5 is temporarily disabled on the TMU_SUB1 block).

- **sensor-index-ranges**: defines valid sensor index ranges
			   for the driver’s bitmap in private data,
			   enabling per-sensor interrupt setup and data access.

Signed-off-by: Shin Son <shin.son@...sung.com>
---
 .../thermal/samsung,exynos-thermal.yaml       | 23 ++++++++++++++++++-
 1 file changed, 22 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..420fb7a944e3 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 +64,29 @@ properties:
     minItems: 1
 
   '#thermal-sensor-cells':
-    const: 0
+    enum:
+      - 0
+      - 1
 
   vtmu-supply:
     description: The regulator node supplying voltage to TMU.
 
+  tmu-name:
+    description: The TMU hardware name.
+    $ref: /schemas/types.yaml#/definitions/string-array
+    minItems: 1
+    maxItems: 1
+
+  sensor-index-ranges:
+    description: |
+      Valid Sensor index ranges for the TMU hardware.
+
+      Note:: On the ExynosautoV920 variant, the fifth sensor in the TMU SUB1 is disabled,
+      so the driver skips it when matching by tmu-name.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 2
+    maxItems: 2
+
 required:
   - compatible
   - clocks
@@ -131,6 +151,7 @@ allOf:
               - samsung,exynos5250-tmu
               - samsung,exynos5260-tmu
               - samsung,exynos5420-tmu
+              - samsung,exynosautov920-tmu
     then:
       properties:
         clocks:
-- 
2.50.1