linux-kernel - [PATCH 5/6] arm64: dts: renesas: r9a08g045: Add TSU node

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Message-ID: <20250103163805.1775705-6-claudiu.beznea.uj@bp.renesas.com>
Date: Fri,  3 Jan 2025 18:38:04 +0200
From: Claudiu <claudiu.beznea@...on.dev>
To: 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,
	p.zabel@...gutronix.de,
	ulf.hansson@...aro.org
Cc: claudiu.beznea@...on.dev,
	linux-pm@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-clk@...r.kernel.org,
	Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: [PATCH 5/6] arm64: dts: renesas: r9a08g045: Add TSU node

From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>

Add TSU node along with thermal zones and keep it enabled in the SoC DTSI.
The temperature reported by the TSU can only be read through channel 8 of
the ADC. Therefore, enable the ADC by default.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
---
 arch/arm64/boot/dts/renesas/r9a08g045.dtsi    | 43 ++++++++++++++++++-
 .../boot/dts/renesas/rzg3s-smarc-som.dtsi     |  4 --
 2 files changed, 42 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/r9a08g045.dtsi b/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
index a9b98db9ef95..fd74138198a8 100644
--- a/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
@@ -205,7 +205,6 @@ adc: adc@...58000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			#io-channel-cells = <1>;
-			status = "disabled";
 
 			channel@0 {
 				reg = <0>;
@@ -244,6 +243,17 @@ channel@8 {
 			};
 		};
 
+		tsu: thermal@...59000 {
+			compatible = "renesas,r9a08g045-tsu";
+			reg = <0 0x10059000 0 0x1000>;
+			clocks = <&cpg CPG_MOD R9A08G045_TSU_PCLK>;
+			resets = <&cpg R9A08G045_TSU_PRESETN>;
+			power-domains = <&cpg>;
+			#thermal-sensor-cells = <0>;
+			io-channels = <&adc 8>;
+			io-channel-names = "tsu";
+		};
+
 		vbattb: clock-controller@...5c000 {
 			compatible = "renesas,r9a08g045-vbattb";
 			reg = <0 0x1005c000 0 0x1000>;
@@ -690,6 +700,37 @@ timer {
 				  "hyp-virt";
 	};
 
+	thermal-zones {
+		cpu_thermal: cpu-thermal {
+			polling-delay-passive = <250>;
+			polling-delay = <1000>;
+			thermal-sensors = <&tsu>;
+			sustainable-power = <423>;
+
+			cooling-maps {
+				map0 {
+					trip = <&target>;
+					cooling-device = <&cpu0 0 2>;
+					contribution = <1024>;
+				};
+			};
+
+			trips {
+				sensor_crit: sensor-crit {
+					temperature = <125000>;
+					hysteresis = <1000>;
+					type = "critical";
+				};
+
+				target: trip-point {
+					temperature = <100000>;
+					hysteresis = <1000>;
+					type = "passive";
+				};
+			};
+		};
+	};
+
 	vbattb_xtal: vbattb-xtal {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
diff --git a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
index ef12c1c462a7..041d256d7b79 100644
--- a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
@@ -102,10 +102,6 @@ x3_clk: x3-clock {
 	};
 };
 
-&adc {
-	status = "okay";
-};
-
 #if SW_CONFIG3 == SW_ON
 &eth0 {
 	pinctrl-0 = <&eth0_pins>;
-- 
2.43.0