From: Aaron Kling <webgeek1234@gmail.com>
Date: Thu, 1 May 2025 22:32:23 +0000 (-0500)
Subject: arm64: tegra: Enable PWM fan on the Jetson TX1 Devkit
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=01f11ffdfd909e870c3863af60875e8de328790a;p=users%2Fjedix%2Flinux-maple.git

arm64: tegra: Enable PWM fan on the Jetson TX1 Devkit

This is based on 6f78a94, which enabled added the fan and thermal zones
for the Jetson Nano 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/20250501-tx1-therm-v2-1-abdb1922c001@gmail.com
Signed-off-by: Thierry Reding <treding@nvidia.com>
---

diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi b/arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi
index 83ed6ac2a8d8..584461f3a619 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi
@@ -1623,6 +1623,18 @@
 		};
 	};
 
+	fan: pwm-fan {
+		compatible = "pwm-fan";
+		pwms = <&pwm 3 45334>;
+		fan-supply = <&vdd_fan>;
+		interrupt-parent = <&gpio>;
+		interrupts = <TEGRA_GPIO(K, 7) IRQ_TYPE_EDGE_RISING>;
+
+		/* cooling level (0, 1, 2, 3) - pwm inverted */
+		cooling-levels = <255 128 64 0>;
+		#cooling-cells = <2>;
+	};
+
 	vdd_sys_mux: regulator-vdd-sys-mux {
 		compatible = "regulator-fixed";
 		regulator-name = "VDD_SYS_MUX";
@@ -1778,4 +1790,67 @@
 		enable-active-high;
 		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>;
+
+		regulator-enable-ramp-delay = <284>;
+	};
+
+	thermal-zones {
+		cpu-thermal {
+			trips {
+				cpu_trip_critical: critical {
+					temperature = <96500>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+
+				cpu_trip_hot: hot {
+					temperature = <70000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+
+				cpu_trip_active: active {
+					temperature = <50000>;
+					hysteresis = <2000>;
+					type = "active";
+				};
+
+				cpu_trip_passive: passive {
+					temperature = <30000>;
+					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>;
+				};
+			};
+		};
+	};
 };