nv-public: add support for thermal trip event

This change binds thermal trip event cooling devices to the following
events:
- sw throttling event
- hot surface event

When the bound trip point temperature gets crossed, the associated
cooling device will become active, and its state can be learnt from the
user space to take the action accordingly.

The thermal trip event cooling device is not needed for safety IGX so
disable it.

Bug 4261645
Bug 1688327

Signed-off-by: Yi-Wei Wang <yiweiw@nvidia.com>
Change-Id: Ifa7f2dfb5c95113e9902e3ea4dfc03197065c5e5
Reviewed-on: https://git-master.nvidia.com/r/c/device/hardware/nvidia/t23x-public-dts/+/3015753
(cherry picked from commit 9279090408)
Reviewed-on: https://git-master.nvidia.com/r/c/device/hardware/nvidia/t23x-public-dts/+/3019214
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>

nv-platform/tegra234-p3737-0000+p3701-xxxx-nv-common.dtsi

@@ -5,6 +5,7 @@
 #include "nv-soc/tegra234-soc-thermal.dtsi"
 #include "nv-soc/tegra234-soc-thermal-slowdown-cluster.dtsi"
 #include "nv-soc/tegra234-soc-thermal-shutdown.dtsi"
+#include "nv-soc/tegra234-soc-thermal-trip-event.dtsi"
 #include "nv-soc/tegra234-soc-audio-dai-links.dtsi"
 #include "nv-soc/tegra234-soc-camera.dtsi"
 #include "tegra234-p3737-0000.dtsi"

nv-platform/tegra234-p3740-0002+p3701-0008-nv-common.dtsi

@@ -5,6 +5,7 @@
 #include "nv-soc/tegra234-soc-thermal.dtsi"
 #include "nv-soc/tegra234-soc-thermal-slowdown-cluster.dtsi"
 #include "nv-soc/tegra234-soc-thermal-shutdown.dtsi"
+#include "nv-soc/tegra234-soc-thermal-trip-event.dtsi"
 #include "nv-soc/tegra234-soc-camera.dtsi"
 #include "tegra234-camera-p3785.dtsi"
 #include "tegra234-p3740-0002.dtsi"

nv-platform/tegra234-p3740-0002+p3701-0008-safety.dtsi

@@ -116,6 +116,14 @@
 				map-devfreq {
 					cooling-device = <&ga10b 0 0>;
 				};
+
+				map-hot-surface-alert {
+					cooling-device = <&hot_surface_alert 0 0>;
+				};
+
+				map-throttle-alert {
+					cooling-device = <&cpu_throttle_alert 0 0>;
+				};
 			};
 		};
 
@@ -130,6 +138,14 @@
 				map-devfreq {
 					cooling-device = <&ga10b 0 0>;
 				};
+
+				map-hot-surface-alert {
+					cooling-device = <&hot_surface_alert 0 0>;
+				};
+
+				map-throttle-alert {
+					cooling-device = <&gpu_throttle_alert 0 0>;
+				};
 			};
 		};
 
@@ -144,6 +160,14 @@
 				map-devfreq {
 					cooling-device = <&ga10b 0 0>;
 				};
+
+				map-hot-surface-alert {
+					cooling-device = <&hot_surface_alert 0 0>;
+				};
+
+				map-throttle-alert {
+					cooling-device = <&cv0_throttle_alert 0 0>;
+				};
 			};
 		};
 
@@ -158,6 +182,14 @@
 				map-devfreq {
 					cooling-device = <&ga10b 0 0>;
 				};
+
+				map-hot-surface-alert {
+					cooling-device = <&hot_surface_alert 0 0>;
+				};
+
+				map-throttle-alert {
+					cooling-device = <&cv1_throttle_alert 0 0>;
+				};
 			};
 		};
 
@@ -172,6 +204,14 @@
 				map-devfreq {
 					cooling-device = <&ga10b 0 0>;
 				};
+
+				map-hot-surface-alert {
+					cooling-device = <&hot_surface_alert 0 0>;
+				};
+
+				map-throttle-alert {
+					cooling-device = <&cv2_throttle_alert 0 0>;
+				};
 			};
 		};
 
@@ -186,6 +226,14 @@
 				map-devfreq {
 					cooling-device = <&ga10b 0 0>;
 				};
+
+				map-hot-surface-alert {
+					cooling-device = <&hot_surface_alert 0 0>;
+				};
+
+				map-throttle-alert {
+					cooling-device = <&soc0_throttle_alert 0 0>;
+				};
 			};
 		};
 
@@ -200,6 +248,14 @@
 				map-devfreq {
 					cooling-device = <&ga10b 0 0>;
 				};
+
+				map-hot-surface-alert {
+					cooling-device = <&hot_surface_alert 0 0>;
+				};
+
+				map-throttle-alert {
+					cooling-device = <&soc1_throttle_alert 0 0>;
+				};
 			};
 		};
 
@@ -214,6 +270,14 @@
 				map-devfreq {
 					cooling-device = <&ga10b 0 0>;
 				};
+
+				map-hot-surface-alert {
+					cooling-device = <&hot_surface_alert 0 0>;
+				};
+
+				map-throttle-alert {
+					cooling-device = <&soc2_throttle_alert 0 0>;
+				};
 			};
 		};
 	};

nv-platform/tegra234-p3768-0000+p3767-xxxx-nv-common.dtsi

@@ -5,6 +5,7 @@
 #include "nv-soc/tegra234-soc-thermal.dtsi"
 #include "nv-soc/tegra234-soc-thermal-slowdown-corepair.dtsi"
 #include "nv-soc/tegra234-soc-thermal-shutdown.dtsi"
+#include "nv-soc/tegra234-soc-thermal-trip-event.dtsi"
 #include "nv-soc/tegra234-soc-audio-dai-links.dtsi"
 #include "tegra234-p3768-0000.dtsi"
 #include "tegra234-p3767-0000.dtsi"

nv-soc/tegra234-soc-thermal-trip-event.dtsi

@@ -0,0 +1,239 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// SPDX-FileCopyrightText: Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES.  All rights reserved.
+
+#define TEGRA234_THERMAL_HOT_SURFACE_TEMP 70000
+#define TEGRA234_THERMAL_HOT_SURFACE_HYST 8000
+
+/ {
+	cpu_throttle_alert: cpu-throttle-alert {
+		compatible = "thermal-trip-event";
+		cdev-type = "cpu-throttle-alert";
+		#cooling-cells = <2>;
+	};
+
+	gpu_throttle_alert: gpu-throttle-alert {
+		compatible = "thermal-trip-event";
+		cdev-type = "gpu-throttle-alert";
+		#cooling-cells = <2>;
+	};
+
+	cv0_throttle_alert: cv0-throttle-alert {
+		compatible = "thermal-trip-event";
+		cdev-type = "cv0-throttle-alert";
+		#cooling-cells = <2>;
+	};
+
+	cv1_throttle_alert: cv1-throttle-alert {
+		compatible = "thermal-trip-event";
+		cdev-type = "cv1-throttle-alert";
+		#cooling-cells = <2>;
+	};
+
+	cv2_throttle_alert: cv2-throttle-alert {
+		compatible = "thermal-trip-event";
+		cdev-type = "cv2-throttle-alert";
+		#cooling-cells = <2>;
+	};
+
+	soc0_throttle_alert: soc0-throttle-alert {
+		compatible = "thermal-trip-event";
+		cdev-type = "soc0-throttle-alert";
+		#cooling-cells = <2>;
+	};
+
+	soc1_throttle_alert: soc1-throttle-alert {
+		compatible = "thermal-trip-event";
+		cdev-type = "soc1-throttle-alert";
+		#cooling-cells = <2>;
+	};
+
+	soc2_throttle_alert: soc2-throttle-alert {
+		compatible = "thermal-trip-event";
+		cdev-type = "soc2-throttle-alert";
+		#cooling-cells = <2>;
+	};
+
+	hot_surface_alert: hot-surface-alert {
+		compatible = "thermal-trip-event";
+		cdev-type = "hot-surface-alert";
+		#cooling-cells = <2>;
+	};
+
+	thermal-zones {
+		cpu-thermal {
+			trips {
+				cpu_trip_hot_surface: hot-surface {
+					temperature = <TEGRA234_THERMAL_HOT_SURFACE_TEMP>;
+					hysteresis = <TEGRA234_THERMAL_HOT_SURFACE_HYST>;
+					type = "passive";
+				};
+			};
+
+			cooling-maps {
+				map-throttle-alert {
+					trip = <&cpu_sw_slowdown>;
+					cooling-device = <&cpu_throttle_alert 1 1>;
+				};
+
+				map-hot-surface-alert {
+					trip = <&cpu_trip_hot_surface>;
+					cooling-device = <&hot_surface_alert 1 1>;
+				};
+			};
+		};
+
+		gpu-thermal {
+			trips {
+				gpu_trip_hot_surface: hot-surface {
+					temperature = <TEGRA234_THERMAL_HOT_SURFACE_TEMP>;
+					hysteresis = <TEGRA234_THERMAL_HOT_SURFACE_HYST>;
+					type = "passive";
+				};
+			};
+
+			cooling-maps {
+				map-throttle-alert {
+					trip = <&gpu_sw_slowdown>;
+					cooling-device = <&gpu_throttle_alert 1 1>;
+				};
+
+				map-hot-surface-alert {
+					trip = <&gpu_trip_hot_surface>;
+					cooling-device = <&hot_surface_alert 1 1>;
+				};
+			};
+		};
+
+		cv0-thermal {
+			trips {
+				cv0_trip_hot_surface: hot-surface {
+					temperature = <TEGRA234_THERMAL_HOT_SURFACE_TEMP>;
+					hysteresis = <TEGRA234_THERMAL_HOT_SURFACE_HYST>;
+					type = "passive";
+				};
+			};
+
+			cooling-maps {
+				map-throttle-alert {
+					trip = <&cv0_sw_slowdown>;
+					cooling-device = <&cv0_throttle_alert 1 1>;
+				};
+
+				map-hot-surface-alert {
+					trip = <&cv0_trip_hot_surface>;
+					cooling-device = <&hot_surface_alert 1 1>;
+				};
+			};
+		};
+
+		cv1-thermal {
+			trips {
+				cv1_trip_hot_surface: hot-surface {
+					temperature = <TEGRA234_THERMAL_HOT_SURFACE_TEMP>;
+					hysteresis = <TEGRA234_THERMAL_HOT_SURFACE_HYST>;
+					type = "passive";
+				};
+			};
+
+			cooling-maps {
+				map-throttle-alert {
+					trip = <&cv1_sw_slowdown>;
+					cooling-device = <&cv1_throttle_alert 1 1>;
+				};
+
+				map-hot-surface-alert {
+					trip = <&cv1_trip_hot_surface>;
+					cooling-device = <&hot_surface_alert 1 1>;
+				};
+			};
+		};
+
+		cv2-thermal {
+			trips {
+				cv2_trip_hot_surface: hot-surface {
+					temperature = <TEGRA234_THERMAL_HOT_SURFACE_TEMP>;
+					hysteresis = <TEGRA234_THERMAL_HOT_SURFACE_HYST>;
+					type = "passive";
+				};
+			};
+
+			cooling-maps {
+				map-throttle-alert {
+					trip = <&cv2_sw_slowdown>;
+					cooling-device = <&cv2_throttle_alert 1 1>;
+				};
+
+				map-hot-surface-alert {
+					trip = <&cv2_trip_hot_surface>;
+					cooling-device = <&hot_surface_alert 1 1>;
+				};
+			};
+		};
+
+		soc0-thermal {
+			trips {
+				soc0_trip_hot_surface: hot-surface {
+					temperature = <TEGRA234_THERMAL_HOT_SURFACE_TEMP>;
+					hysteresis = <TEGRA234_THERMAL_HOT_SURFACE_HYST>;
+					type = "passive";
+				};
+			};
+
+			cooling-maps {
+				map-throttle-alert {
+					trip = <&soc0_sw_slowdown>;
+					cooling-device = <&soc0_throttle_alert 1 1>;
+				};
+
+				map-hot-surface-alert {
+					trip = <&soc0_trip_hot_surface>;
+					cooling-device = <&hot_surface_alert 1 1>;
+				};
+			};
+		};
+
+		soc1-thermal {
+			trips {
+				soc1_trip_hot_surface: hot-surface {
+					temperature = <TEGRA234_THERMAL_HOT_SURFACE_TEMP>;
+					hysteresis = <TEGRA234_THERMAL_HOT_SURFACE_HYST>;
+					type = "passive";
+				};
+			};
+
+			cooling-maps {
+				map-throttle-alert {
+					trip = <&soc1_sw_slowdown>;
+					cooling-device = <&soc1_throttle_alert 1 1>;
+				};
+
+				map-hot-surface-alert {
+					trip = <&soc1_trip_hot_surface>;
+					cooling-device = <&hot_surface_alert 1 1>;
+				};
+			};
+		};
+
+		soc2-thermal {
+			trips {
+				soc2_trip_hot_surface: hot-surface {
+					temperature = <TEGRA234_THERMAL_HOT_SURFACE_TEMP>;
+					hysteresis = <TEGRA234_THERMAL_HOT_SURFACE_HYST>;
+					type = "passive";
+				};
+			};
+
+			cooling-maps {
+				map-throttle-alert {
+					trip = <&soc2_sw_slowdown>;
+					cooling-device = <&soc2_throttle_alert 1 1>;
+				};
+
+				map-hot-surface-alert {
+					trip = <&soc2_trip_hot_surface>;
+					cooling-device = <&hot_surface_alert 1 1>;
+				};
+			};
+		};
+	};
+};