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arm64: dts: ti: k3-am62a: Enable CPU freq throttling on thermal alert

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

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Link: https://lore.kernel.org/r/20250506114134.3514899-1-d.schultz@phytec.de
Signed-off-by: Nishanth Menon <nm@ti.com>
This commit is contained in:
Daniel Schultz
2025-05-09 06:18:30 -05:00
committed by Nishanth Menon
parent 6b8deb2ff0
commit 8785b579d4
2 changed files with 58 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi
+54 -3
View File
@@ -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 {
@@ -26,25 +43,59 @@ 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 {
polling-delay-passive = <250>; /* milliSeconds */
polling-delay = <500>; /* milliSeconds */
thermal-sensors = <&wkup_vtm0 2>;
polling-delay-passive = <250>; /* milliSeconds */
polling-delay = <500>; /* milliSeconds */
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-am62a7.dtsi
+4
View File
@@ -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>;
};
};