68 lines
2.2 KiB
Plaintext
68 lines
2.2 KiB
Plaintext
Tegra124 SOCTHERM thermal management system
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The SOCTHERM IP block contains thermal sensors, support for polled
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or interrupt-based thermal monitoring, CPU and GPU throttling based
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on temperature trip points, and handling external overcurrent
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notifications. It is also used to manage emergency shutdown in an
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overheating situation.
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Required properties :
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- compatible : For Tegra124, must contain "nvidia,tegra124-soctherm".
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For Tegra132, must contain "nvidia,tegra132-soctherm".
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For Tegra210, must contain "nvidia,tegra210-soctherm".
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- reg : Should contain 1 entry:
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- SOCTHERM register set
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- interrupts : Defines the interrupt used by SOCTHERM
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- clocks : Must contain an entry for each entry in clock-names.
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See ../clocks/clock-bindings.txt for details.
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- clock-names : Must include the following entries:
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- tsensor
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- soctherm
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- resets : Must contain an entry for each entry in reset-names.
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See ../reset/reset.txt for details.
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- reset-names : Must include the following entries:
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- soctherm
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- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description
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of this property. See <dt-bindings/thermal/tegra124-soctherm.h> for a
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list of valid values when referring to thermal sensors.
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Note:
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- the "critical" type trip points will be set to SOC_THERM hardware as the
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shut down temperature. Once the temperature of this thermal zone is higher
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than it, the system will be shutdown or reset by hardware.
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Example :
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soctherm@700e2000 {
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compatible = "nvidia,tegra124-soctherm";
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reg = <0x0 0x700e2000 0x0 0x1000>;
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interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&tegra_car TEGRA124_CLK_TSENSOR>,
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<&tegra_car TEGRA124_CLK_SOC_THERM>;
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clock-names = "tsensor", "soctherm";
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resets = <&tegra_car 78>;
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reset-names = "soctherm";
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#thermal-sensor-cells = <1>;
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};
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Example: referring to thermal sensors :
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thermal-zones {
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cpu {
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polling-delay-passive = <1000>;
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polling-delay = <1000>;
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thermal-sensors =
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<&soctherm TEGRA124_SOCTHERM_SENSOR_CPU>;
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trips {
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cpu_shutdown_trip: shutdown-trip {
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temperature = <102500>;
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hysteresis = <1000>;
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type = "critical";
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};
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};
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};
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};
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