From: Alessandro Zini <alessandro.zini@siemens.com>
Date: Wed, 14 Aug 2024 21:43:28 +0000 (+0200)
Subject: arm64: dts: ti: k3-am62: Enable CPU freq throttling on thermal alert
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=10e7bfd8114c207acd3858086f07061e447dd04f;p=linux.git

arm64: dts: ti: k3-am62: Enable CPU freq throttling on thermal alert

Enable throttling down the CPU frequency when an alert temperature
threshold (lower than the critical threshold) is reached.

Signed-off-by: Alessandro Zini <alessandro.zini@siemens.com>
Link: https://lore.kernel.org/r/20240814214328.14155-1-alessandro.zini@siemens.com
Signed-off-by: Nishanth Menon <nm@ti.com>
---

diff --git a/arch/arm64/boot/dts/ti/k3-am62-thermal.dtsi b/arch/arm64/boot/dts/ti/k3-am62-thermal.dtsi
index 12ba833002a1..3c6a80aebd9f 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-thermal.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-thermal.dtsi
@@ -12,12 +12,29 @@ thermal_zones: thermal-zones {
 		thermal-sensors = <&wkup_vtm0 0>;
 
 		trips {
+			main0_alert: main0-alert {
+				temperature = <95000>;
+				hysteresis = <2000>;
+				type = "passive";
+			};
+
 			main0_crit: main0-crit {
 				temperature = <105000>;	/* 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 {
@@ -26,11 +43,28 @@ thermal_zones: thermal-zones {
 		thermal-sensors = <&wkup_vtm0 1>;
 
 		trips {
+			main1_alert: main1-alert {
+				temperature = <95000>;
+				hysteresis = <2000>;
+				type = "passive";
+			};
+
 			main1_crit: main1-crit {
 				temperature = <105000>;	/* 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>;
+			};
+		};
 	};
 };
diff --git a/arch/arm64/boot/dts/ti/k3-am625.dtsi b/arch/arm64/boot/dts/ti/k3-am625.dtsi
index 4014add6320d..c3d1db47dc9f 100644
--- a/arch/arm64/boot/dts/ti/k3-am625.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am625.dtsi
@@ -50,6 +50,7 @@
 			next-level-cache = <&L2_0>;
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 135 0>;
+			#cooling-cells = <2>;
 		};
 
 		cpu1: cpu@1 {
@@ -66,6 +67,7 @@
 			next-level-cache = <&L2_0>;
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 136 0>;
+			#cooling-cells = <2>;
 		};
 
 		cpu2: cpu@2 {
@@ -82,6 +84,7 @@
 			next-level-cache = <&L2_0>;
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 137 0>;
+			#cooling-cells = <2>;
 		};
 
 		cpu3: cpu@3 {
@@ -98,6 +101,7 @@
 			next-level-cache = <&L2_0>;
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 138 0>;
+			#cooling-cells = <2>;
 		};
 	};