From: Aaron Kling <webgeek1234@gmail.com>
Date: Sun, 27 Apr 2025 20:05:32 +0000 (-0500)
Subject: arm64: tegra: Enable PWM fan on the Jetson TX2 Devkit
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=b84f1c0187653b2a91919624e2da0dab0b036a6f;p=users%2Fjedix%2Flinux-maple.git

arm64: tegra: Enable PWM fan on the Jetson TX2 Devkit

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>
Link: https://lore.kernel.org/r/20250427-tx2-therm-v1-1-65ddb4314723@gmail.com
Signed-off-by: Thierry Reding <treding@nvidia.com>
---

diff --git a/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts b/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts
index 15aa49fc45039..a50fd205daa86 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 @@
 		};
 	};
 
+	pwm@c340000 {
+		status = "okay";
+	};
+
 	pcie@10003000 {
 		status = "okay";
 
@@ -2508,6 +2512,16 @@
 		};
 	};
 
+	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 @@
 		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 @@
 
 		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";
+				};
+			};
+		};
+	};
 };