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1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/thermal/ti,j72xx-thermal.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Texas Instruments J72XX VTM (DTS)8 9maintainers:10 - Keerthy <j-keerthy@ti.com>11 12description: |13 The TI K3 family of SoCs typically have a Voltage & Thermal14 Management (VTM) device to control up to 8 temperature diode15 sensors to measure silicon junction temperatures from different16 hotspots of the chip as well as provide temperature, interrupt17 and alerting information.18 19 The following polynomial equation can then be used to convert20 value returned by this device into a temperature in Celsius21 22 Temp(C) = (-9.2627e-12) * x^4 + (6.0373e-08) * x^3 + \23 (-1.7058e-04) * x^2 + (3.2512e-01) * x + (-4.9003e+01)24 25$ref: thermal-sensor.yaml#26 27properties:28 compatible:29 enum:30 - ti,j721e-vtm31 - ti,j7200-vtm32 33 reg:34 items:35 - description: VTM cfg1 register space36 - description: VTM cfg2 register space37 - description: |38 A software trimming method must be applied to some Jacinto39 devices to function properly. This eFuse region provides40 the information needed for these SoCs to report41 temperatures accurately.42 minItems: 243 44 power-domains:45 maxItems: 146 47 "#thermal-sensor-cells":48 const: 149 50allOf:51 - if:52 properties:53 compatible:54 contains:55 const: ti,j721e-vtm56 then:57 properties:58 reg:59 minItems: 360 else:61 properties:62 reg:63 maxItems: 264 65required:66 - compatible67 - reg68 - power-domains69 70unevaluatedProperties: false71 72examples:73 - |74 #include <dt-bindings/soc/ti,sci_pm_domain.h>75 wkup_vtm0: thermal-sensor@42040000 {76 compatible = "ti,j721e-vtm";77 reg = <0x42040000 0x350>,78 <0x42050000 0x350>,79 <0x43000300 0x10>;80 power-domains = <&k3_pds 154 TI_SCI_PD_EXCLUSIVE>;81 #thermal-sensor-cells = <1>;82 };83 84 mpu_thermal: mpu-thermal {85 polling-delay-passive = <250>; /* milliseconds */86 polling-delay = <500>; /* milliseconds */87 thermal-sensors = <&wkup_vtm0 0>;88 89 trips {90 mpu_crit: mpu-crit {91 temperature = <125000>; /* milliCelsius */92 hysteresis = <2000>; /* milliCelsius */93 type = "critical";94 };95 };96 };97...98