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>

arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts

@@ -2415,6 +2415,10 @@
 		};
 	};
 
+	pwm@c340000 {
+		status = "okay";
+	};
+
 	pcie@10003000 {
 		status = "okay";
 
@@ -2514,6 +2518,16 @@
 		};
 	};
 
+	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";
@@ -2562,6 +2576,17 @@
 		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";
@@ -2627,4 +2652,88 @@
 
 		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";
+				};
+			};
+		};
+	};
 };