From 8785b579d431b2a76a64f105328434d3c543debf Mon Sep 17 00:00:00 2001 From: Daniel Schultz Date: Tue, 6 May 2025 04:41:33 -0700 Subject: [PATCH] arm64: dts: ti: k3-am62a: 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: Daniel Schultz Reviewed-by: Bryan Brattlof Link: https://lore.kernel.org/r/20250506114134.3514899-1-d.schultz@phytec.de Signed-off-by: Nishanth Menon --- arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi | 57 ++++++++++++++++++-- arch/arm64/boot/dts/ti/k3-am62a7.dtsi | 4 ++ 2 files changed, 58 insertions(+), 3 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi index c7486fb2a5b4..3aa127157d24 100644 --- a/arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62a-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 { @@ -26,25 +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>; + }; + }; }; }; diff --git a/arch/arm64/boot/dts/ti/k3-am62a7.dtsi b/arch/arm64/boot/dts/ti/k3-am62a7.dtsi index 6c99221beb6b..b6e5eee99370 100644 --- a/arch/arm64/boot/dts/ti/k3-am62a7.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62a7.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>; }; }; -- 2.50.1