linux-kernel - [PATCH v3 4/9] dt-bindings: thermal: r9a09g047-tsu: document RZ/T2H and RZ/N2H

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Message-ID: <20251126130356.2768625-5-cosmin-gabriel.tanislav.xa@renesas.com>
Date: Wed, 26 Nov 2025 15:03:51 +0200
From: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
To: John Madieu <john.madieu.xa@...renesas.com>,
	"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>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-pm@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
Subject: [PATCH v3 4/9] dt-bindings: thermal: r9a09g047-tsu: document RZ/T2H and RZ/N2H

The Renesas RZ/T2H (R9A09G077) and RZ/N2H (R9A09G087) SoCs include a
Temperature Sensor Unit (TSU). The device provides real-time temperature
measurements for thermal management, utilizing a single dedicated
channel for temperature sensing.

Compared to the previously supported RZ/G3E, the RZ/T2H and RZ/N2H SoCs
do not have a reset for the TSU peripheral, and the OTP data is exposed
via ARM SMC, as opposed to a system register.

Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
---
V3:
 * add more details about the differences in the commit message
 * rebase on top of [1]
 * conditionally add `resets: false` and `renesas,tsu-trim: false` for
   renesas,r9a09g077-tsu compatibles

[1]: https://patchwork.kernel.org/project/linux-pm/cover/20251020143107.13974-1-ovidiu.panait.rb@renesas.com/

V2:
 * merge two items into a single enum

 .../thermal/renesas,r9a09g047-tsu.yaml        | 30 +++++++++++++++++--
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/thermal/renesas,r9a09g047-tsu.yaml b/Documentation/devicetree/bindings/thermal/renesas,r9a09g047-tsu.yaml
index befdc8b7a082..a04e5048eadf 100644
--- a/Documentation/devicetree/bindings/thermal/renesas,r9a09g047-tsu.yaml
+++ b/Documentation/devicetree/bindings/thermal/renesas,r9a09g047-tsu.yaml
@@ -17,10 +17,15 @@ description:
 properties:
   compatible:
     oneOf:
-      - const: renesas,r9a09g047-tsu # RZ/G3E
+      - enum:
+          - renesas,r9a09g047-tsu # RZ/G3E
+          - renesas,r9a09g077-tsu # RZ/T2H
       - items:
           - const: renesas,r9a09g057-tsu # RZ/V2H
           - const: renesas,r9a09g047-tsu # RZ/G3E
+      - items:
+          - const: renesas,r9a09g087-tsu # RZ/N2H
+          - const: renesas,r9a09g077-tsu # RZ/T2H
 
   reg:
     maxItems: 1
@@ -63,12 +68,31 @@ required:
   - compatible
   - reg
   - clocks
-  - resets
   - power-domains
   - interrupts
   - interrupt-names
   - "#thermal-sensor-cells"
-  - renesas,tsu-trim
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a09g047-tsu
+    then:
+      required:
+        - resets
+        - renesas,tsu-trim
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a09g077-tsu
+    then:
+      properties:
+        resets: false
+        renesas,tsu-trim: false
 
 additionalProperties: false
 
-- 
2.52.0