From: Aaron Kling <webgeek1234@gmail.com>

This is based on the existing configuration of the Jetson TX2 NX devkit.
The fan and thermal characteristics of the two devkits are similar, so
using the same configuration.

Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
 arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts | 109 +++++++++++++++++++++
 1 file changed, 109 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts b/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts
index 15aa49fc450399c7bd525adcdb6e92a27a185805..a50fd205daa868d58baa6af085d6409560c5c740 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts
@@ -2409,6 +2409,10 @@ eeprom@57 {
 		};
 	};
 
+	pwm@c340000 {
+		status = "okay";
+	};
+
 	pcie@10003000 {
 		status = "okay";
 
@@ -2508,6 +2512,16 @@ key-volume-up {
 		};
 	};
 
+	fan: pwm-fan {
+		compatible = "pwm-fan";
+		pwms = <&pwm4 0 45334>;
+		fan-supply = <&vdd_fan>;
+
+		/* cooling level (0, 1, 2, 3) - pwm inverted */
+		cooling-levels = <255 128 64 0>;
+		#cooling-cells = <2>;
+	};
+
 	vdd_sd: regulator-vdd-sd {
 		compatible = "regulator-fixed";
 		regulator-name = "SD_CARD_SW_PWR";
@@ -2556,6 +2570,17 @@ vdd_usb1: regulator-vdd-usb1 {
 		vin-supply = <&vdd_5v0_sys>;
 	};
 
+	vdd_fan: regulator-vdd-fan {
+		compatible = "regulator-fixed";
+		regulator-name = "VDD_FAN";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+
+		gpio = <&exp1 4 GPIO_ACTIVE_LOW>;
+
+		vin-supply = <&vdd_5v0_sys>;
+	};
+
 	sound {
 		compatible = "nvidia,tegra186-audio-graph-card";
 		status = "okay";
@@ -2621,4 +2646,88 @@ sound {
 
 		label = "NVIDIA Jetson TX2 APE";
 	};
+
+	thermal-zones {
+		cpu-thermal {
+			polling-delay = <0>;
+			polling-delay-passive = <500>;
+			status = "okay";
+
+			trips {
+				cpu_trip_critical: critical {
+					temperature = <96500>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+
+				cpu_trip_hot: hot {
+					temperature = <79000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+
+				cpu_trip_active: active {
+					temperature = <62000>;
+					hysteresis = <2000>;
+					type = "active";
+				};
+
+				cpu_trip_passive: passive {
+					temperature = <45000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+			};
+
+			cooling-maps {
+				map0 {
+					cooling-device = <&fan 3 3>;
+					trip = <&cpu_trip_critical>;
+				};
+
+				map1 {
+					cooling-device = <&fan 2 2>;
+					trip = <&cpu_trip_hot>;
+				};
+
+				map2 {
+					cooling-device = <&fan 1 1>;
+					trip = <&cpu_trip_active>;
+				};
+
+				map3 {
+					cooling-device = <&fan 0 0>;
+					trip = <&cpu_trip_passive>;
+				};
+			};
+		};
+
+		aux-thermal {
+			polling-delay = <0>;
+			polling-delay-passive = <500>;
+			status = "okay";
+
+			trips {
+				aux_alert0: critical {
+					temperature = <90000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+		};
+
+		gpu-thermal {
+			polling-delay = <0>;
+			polling-delay-passive = <500>;
+			status = "okay";
+
+			trips {
+				gpu_alert0: critical {
+					temperature = <99000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+		};
+	};
 };

---
base-commit: 5bc1018675ec28a8a60d83b378d8c3991faa5a27
change-id: 20250426-tx2-therm-cce1999a0e4d

Best regards,
-- 
Aaron Kling <webgeek1234@gmail.com>

From: Thierry Reding <treding@nvidia.com>


On Sun, 27 Apr 2025 15:05:32 -0500, Aaron Kling wrote:
> This is based on the existing configuration of the Jetson TX2 NX devkit.
> The fan and thermal characteristics of the two devkits are similar, so
> using the same configuration.
> 
> 

Applied, thanks!

[1/1] arm64: tegra: Enable PWM fan on the Jetson TX2 Devkit
      commit: b84f1c0187653b2a91919624e2da0dab0b036a6f

Best regards,
-- 
Thierry Reding <treding@nvidia.com>