97 lines
2.4 KiB
YAML
97 lines
2.4 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/thermal/ti,j72xx-thermal.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Texas Instruments J72XX VTM (DTS)
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maintainers:
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- Keerthy <j-keerthy@ti.com>
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description: |
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The TI K3 family of SoCs typically have a Voltage & Thermal
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Management (VTM) device to control up to 8 temperature diode
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sensors to measure silicon junction temperatures from different
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hotspots of the chip as well as provide temperature, interrupt
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and alerting information.
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The following polynomial equation can then be used to convert
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value returned by this device into a temperature in Celsius
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Temp(C) = (-9.2627e-12) * x^4 + (6.0373e-08) * x^3 + \
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(-1.7058e-04) * x^2 + (3.2512e-01) * x + (-4.9003e+01)
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properties:
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compatible:
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enum:
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- ti,j721e-vtm
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- ti,j7200-vtm
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reg:
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items:
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- description: VTM cfg1 register space
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- description: VTM cfg2 register space
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- description: |
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A software trimming method must be applied to some Jacinto
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devices to function properly. This eFuse region provides
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the information needed for these SoCs to report
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temperatures accurately.
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minItems: 2
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power-domains:
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maxItems: 1
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"#thermal-sensor-cells":
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const: 1
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allOf:
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- if:
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properties:
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compatible:
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contains:
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const: ti,j721e-vtm
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then:
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properties:
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reg:
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minItems: 3
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else:
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properties:
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reg:
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maxItems: 2
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required:
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- compatible
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- reg
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- power-domains
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- "#thermal-sensor-cells"
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/soc/ti,sci_pm_domain.h>
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wkup_vtm0: thermal-sensor@42040000 {
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compatible = "ti,j721e-vtm";
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reg = <0x42040000 0x350>,
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<0x42050000 0x350>,
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<0x43000300 0x10>;
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power-domains = <&k3_pds 154 TI_SCI_PD_EXCLUSIVE>;
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#thermal-sensor-cells = <1>;
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};
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mpu_thermal: mpu-thermal {
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polling-delay-passive = <250>; /* milliseconds */
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polling-delay = <500>; /* milliseconds */
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thermal-sensors = <&wkup_vtm0 0>;
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trips {
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mpu_crit: mpu-crit {
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temperature = <125000>; /* milliCelsius */
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hysteresis = <2000>; /* milliCelsius */
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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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