linux-kernel - [PATCH] arm64: dts: renesas: r8a779f0: Add thermal support

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Date:   Wed, 25 May 2022 17:13:55 +0200
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     linux-renesas-soc@...r.kernel.org
Cc:     Linh Phung <linh.phung.jy@...esas.com>,
        Wolfram Sang <wsa@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: renesas: r8a779f0: Add thermal support

From: Linh Phung <linh.phung.jy@...esas.com>

Add support for 3 TSC nodes of thermal. The 4th node is for the control
domain and not for Linux.

Signed-off-by: Linh Phung <linh.phung.jy@...esas.com>
[wsa: rebased, fixed resource size, removed unused 4th node breaking probe]
Signed-off-by: Wolfram Sang <wsa@...nel.org>
---

Works fine on my Spider board and allowed me to disconnect the fan :)

 arch/arm64/boot/dts/renesas/r8a779f0.dtsi | 56 +++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r8a779f0.dtsi b/arch/arm64/boot/dts/renesas/r8a779f0.dtsi
index df46fb87cffc..d89064f86d85 100644
--- a/arch/arm64/boot/dts/renesas/r8a779f0.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a779f0.dtsi
@@ -157,6 +157,18 @@ sysc: system-controller@...80000 {
 			#power-domain-cells = <1>;
 		};
 
+		tsc: thermal@...98000 {
+			compatible = "renesas,r8a779f0-thermal";
+			/* The 4th sensor is in control domain and not for Linux */
+			reg = <0 0xe6198000 0 0x200>,
+			      <0 0xe61a0000 0 0x200>,
+			      <0 0xe61a8000 0 0x200>;
+			clocks = <&cpg CPG_MOD 919>;
+			power-domains = <&sysc R8A779F0_PD_ALWAYS_ON>;
+			resets = <&cpg 919>;
+			#thermal-sensor-cells = <1>;
+		};
+
 		i2c0: i2c@...00000 {
 			compatible = "renesas,i2c-r8a779f0",
 				     "renesas,rcar-gen4-i2c";
@@ -360,6 +372,50 @@ prr: chipid@...00044 {
 		};
 	};
 
+	thermal-zones {
+		sensor_thermal1: sensor-thermal1 {
+			polling-delay-passive = <250>;
+			polling-delay = <1000>;
+			thermal-sensors = <&tsc 0>;
+
+			trips {
+				sensor1_crit: sensor1-crit {
+					temperature = <120000>;
+					hysteresis = <1000>;
+					type = "critical";
+				};
+			};
+		};
+
+		sensor_thermal2: sensor-thermal2 {
+			polling-delay-passive = <250>;
+			polling-delay = <1000>;
+			thermal-sensors = <&tsc 1>;
+
+			trips {
+				sensor2_crit: sensor2-crit {
+					temperature = <120000>;
+					hysteresis = <1000>;
+					type = "critical";
+				};
+			};
+		};
+
+		sensor_thermal3: sensor-thermal3 {
+			polling-delay-passive = <250>;
+			polling-delay = <1000>;
+			thermal-sensors = <&tsc 2>;
+
+			trips {
+				sensor3_crit: sensor3-crit {
+					temperature = <120000>;
+					hysteresis = <1000>;
+					type = "critical";
+				};
+			};
+		};
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupts-extended = <&gic GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(1) | IRQ_TYPE_LEVEL_LOW)>,
-- 
2.35.1