linux-kernel - [PATCH 3/3] arm64: dts: renesas: r9a09g057: Add TSU nodes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251016131327.19141-4-ovidiu.panait.rb@renesas.com>
Date: Thu, 16 Oct 2025 13:13:27 +0000
From: Ovidiu Panait <ovidiu.panait.rb@...esas.com>
To: john.madieu.xa@...renesas.com,
	rafael@...nel.org,
	daniel.lezcano@...aro.org,
	rui.zhang@...el.com,
	lukasz.luba@....com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	geert+renesas@...der.be,
	magnus.damm@...il.com,
	mturquette@...libre.com,
	sboyd@...nel.org
Cc: linux-pm@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	linux-clk@...r.kernel.org
Subject: [PATCH 3/3] arm64: dts: renesas: r9a09g057: Add TSU nodes

The Renesas RZ/V2H SoC includes a Thermal Sensor Unit (TSU) block designed
to measure the junction temperature. The device provides real-time
temperature measurements for thermal management, utilizing two dedicated
channels for temperature sensing:
- TSU0, which is located near the DRP-AI block
- TSU1, which is located near the CPU and DRP-AI block

Since TSU1 is physically closer the CPU and the highest temperature
spot, it is used for CPU throttling through a passive trip and cooling
map. TSU0 is configured only with a critical trip.

Add TSU nodes along with thermal zones and keep them enabled in the SoC
DTSI.

Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@...esas.com>
---
 arch/arm64/boot/dts/renesas/r9a09g057.dtsi | 75 ++++++++++++++++++++++
 1 file changed, 75 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
index e426b9978e22..e88cfc965415 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
@@ -65,6 +65,7 @@ cpu0: cpu@0 {
 			next-level-cache = <&L3_CA55>;
 			enable-method = "psci";
 			clocks = <&cpg CPG_CORE R9A09G057_CA55_0_CORE_CLK0>;
+			#cooling-cells = <2>;
 			operating-points-v2 = <&cluster0_opp>;
 		};
 
@@ -75,6 +76,7 @@ cpu1: cpu@100 {
 			next-level-cache = <&L3_CA55>;
 			enable-method = "psci";
 			clocks = <&cpg CPG_CORE R9A09G057_CA55_0_CORE_CLK1>;
+			#cooling-cells = <2>;
 			operating-points-v2 = <&cluster0_opp>;
 		};
 
@@ -85,6 +87,7 @@ cpu2: cpu@200 {
 			next-level-cache = <&L3_CA55>;
 			enable-method = "psci";
 			clocks = <&cpg CPG_CORE R9A09G057_CA55_0_CORE_CLK2>;
+			#cooling-cells = <2>;
 			operating-points-v2 = <&cluster0_opp>;
 		};
 
@@ -95,6 +98,7 @@ cpu3: cpu@300 {
 			next-level-cache = <&L3_CA55>;
 			enable-method = "psci";
 			clocks = <&cpg CPG_CORE R9A09G057_CA55_0_CORE_CLK3>;
+			#cooling-cells = <2>;
 			operating-points-v2 = <&cluster0_opp>;
 		};
 
@@ -285,6 +289,32 @@ sys: system-controller@...30000 {
 			resets = <&cpg 0x30>;
 		};
 
+		tsu0: thermal@...00000 {
+			compatible = "renesas,r9a09g057-tsu", "renesas,r9a09g047-tsu";
+			reg = <0 0x11000000 0 0x1000>;
+			interrupts = <GIC_SPI 248 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 249 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "adi", "adcmpi";
+			clocks = <&cpg CPG_MOD 0x109>;
+			resets = <&cpg 0xf7>;
+			power-domains = <&cpg>;
+			#thermal-sensor-cells = <0>;
+			renesas,tsu-trim = <&sys 0x320>;
+		};
+
+		tsu1: thermal@...02000 {
+			compatible = "renesas,r9a09g057-tsu", "renesas,r9a09g047-tsu";
+			reg = <0 0x14002000 0 0x1000>;
+			interrupts = <GIC_SPI 250 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 251 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "adi", "adcmpi";
+			clocks = <&cpg CPG_MOD 0x10a>;
+			resets = <&cpg 0xf8>;
+			power-domains = <&cpg>;
+			#thermal-sensor-cells = <0>;
+			renesas,tsu-trim = <&sys 0x330>;
+		};
+
 		xspi: spi@...30000 {
 			compatible = "renesas,r9a09g057-xspi", "renesas,r9a09g047-xspi";
 			reg = <0 0x11030000 0 0x10000>,
@@ -1326,6 +1356,51 @@ stmmac_axi_setup: stmmac-axi-config {
 		snps,blen = <16 8 4 0 0 0 0>;
 	};
 
+	thermal-zones {
+		sensor1_thermal: sensor1-thermal {
+			polling-delay = <1000>;
+			polling-delay-passive = <250>;
+			thermal-sensors = <&tsu0>;
+
+			trips {
+				sensor1_crit: sensor1-crit {
+					temperature = <120000>;
+					hysteresis = <1000>;
+					type = "critical";
+				};
+			};
+		};
+
+		sensor2_thermal: sensor2-thermal {
+			polling-delay = <1000>;
+			polling-delay-passive = <250>;
+			thermal-sensors = <&tsu1>;
+
+			cooling-maps {
+				map0 {
+					trip = <&sensor2_target>;
+					cooling-device = <&cpu0 0 3>, <&cpu1 0 3>,
+							 <&cpu2 0 3>, <&cpu3 0 3>;
+					contribution = <1024>;
+				};
+			};
+
+			trips {
+				sensor2_target: trip-point {
+					temperature = <95000>;
+					hysteresis = <1000>;
+					type = "passive";
+				};
+
+				sensor2_crit: sensor2-crit {
+					temperature = <120000>;
+					hysteresis = <1000>;
+					type = "critical";
+				};
+			};
+		};
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupts = <GIC_PPI 13 IRQ_TYPE_LEVEL_LOW>,
-- 
2.51.0