arm64: dts: ti: k3-am62p-j722s: Enable freq throttling on thermal alert

Enable throttling down the CPU frequency when an alert temperature
threshold is reached before the critical temperature for shutdown.

Signed-off-by: João Paulo Gonçalves <[email protected]>
Link: https://lore.kernel.org/r/20250623-b4-verdin-am62p-cooling-device-v1-1-cc185ba5843d@toradex.com
Signed-off-by: Vignesh Raghavendra <[email protected]>

Author: JPSGoncalves

arch/arm64/boot/dts/ti/k3-am62p-j722s-common-thermal.dtsi

@@ -12,12 +12,29 @@ thermal_zones: thermal-zones {
 		thermal-sensors = <&wkup_vtm0 0>;
 
 		trips {
+			main0_alert: main0-alert {
+				temperature = <115000>;
+				hysteresis = <2000>;
+				type = "passive";
+			};
+
 			main0_crit: main0-crit {
 				temperature = <125000>;	/* milliCelsius */
 				hysteresis = <2000>;	/* milliCelsius */
 				type = "critical";
 			};
 		};
+
+		cooling-maps {
+			map0 {
+				trip = <&main0_alert>;
+				cooling-device =
+					<&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+					<&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+					<&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+					<&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+			};
+		};
 	};
 
 	main1_thermal: main1-thermal {
@@ -26,12 +43,29 @@ thermal_zones: thermal-zones {
 		thermal-sensors = <&wkup_vtm0 1>;
 
 		trips {
+			main1_alert: main1-alert {
+				temperature = <115000>;
+				hysteresis = <2000>;
+				type = "passive";
+			};
+
 			main1_crit: main1-crit {
 				temperature = <125000>;	/* milliCelsius */
 				hysteresis = <2000>;	/* milliCelsius */
 				type = "critical";
 			};
 		};
+
+		cooling-maps {
+			map0 {
+				trip = <&main1_alert>;
+				cooling-device =
+					<&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+					<&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+					<&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+					<&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+			};
+		};
 	};
 
 	main2_thermal: main2-thermal {
@@ -40,11 +74,28 @@ thermal_zones: thermal-zones {
 	       thermal-sensors = <&wkup_vtm0 2>;
 
 		trips {
+			main2_alert: main2-alert {
+				temperature = <115000>;
+				hysteresis = <2000>;
+				type = "passive";
+			};
+
 			main2_crit: main2-crit {
 				temperature = <125000>;	/* milliCelsius */
 				hysteresis = <2000>;	/* milliCelsius */
 				type = "critical";
 			};
 		};
+
+		cooling-maps {
+			map0 {
+				trip = <&main2_alert>;
+				cooling-device =
+					<&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+					<&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+					<&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+					<&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+			};
+		};
 	};
 };

arch/arm64/boot/dts/ti/k3-am62p5.dtsi

@@ -49,6 +49,7 @@
 			next-level-cache = <&l2_0>;
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 135 0>;
+			#cooling-cells = <2>;
 		};
 
 		cpu1: cpu@1 {
@@ -65,6 +66,7 @@
 			next-level-cache = <&l2_0>;
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 136 0>;
+			#cooling-cells = <2>;
 		};
 
 		cpu2: cpu@2 {
@@ -81,6 +83,7 @@
 			next-level-cache = <&l2_0>;
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 137 0>;
+			#cooling-cells = <2>;
 		};
 
 		cpu3: cpu@3 {
@@ -97,6 +100,7 @@
 			next-level-cache = <&l2_0>;
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 138 0>;
+			#cooling-cells = <2>;
 		};
 	};
 

arch/arm64/boot/dts/ti/k3-j722s.dtsi

@@ -56,6 +56,7 @@
 			d-cache-sets = <128>;
 			next-level-cache = <&l2_0>;
 			clocks = <&k3_clks 135 0>;
+			#cooling-cells = <2>;
 		};
 
 		cpu1: cpu@1 {
@@ -71,6 +72,7 @@
 			d-cache-sets = <128>;
 			next-level-cache = <&l2_0>;
 			clocks = <&k3_clks 136 0>;
+			#cooling-cells = <2>;
 		};
 
 		cpu2: cpu@2 {
@@ -86,6 +88,7 @@
 			d-cache-sets = <128>;
 			next-level-cache = <&l2_0>;
 			clocks = <&k3_clks 137 0>;
+			#cooling-cells = <2>;
 		};
 
 		cpu3: cpu@3 {
@@ -101,6 +104,7 @@
 			d-cache-sets = <128>;
 			next-level-cache = <&l2_0>;
 			clocks = <&k3_clks 138 0>;
+			#cooling-cells = <2>;
 		};
 	};