1# SPDX-License-Identifier: (GPL-2.0) 2# Copyright 2020 Linaro Ltd. 3%YAML 1.2 4--- 5$id: http://devicetree.org/schemas/thermal/thermal-sensor.yaml# 6$schema: http://devicetree.org/meta-schemas/core.yaml# 7 8title: Thermal sensor binding 9 10maintainers: 11 - Amit Kucheria <amitk@kernel.org> 12 13description: | 14 Thermal management is achieved in devicetree by describing the sensor hardware 15 and the software abstraction of thermal zones required to take appropriate 16 action to mitigate thermal overloads. 17 18 The following node types are used to completely describe a thermal management 19 system in devicetree: 20 - thermal-sensor: device that measures temperature, has SoC-specific bindings 21 - cooling-device: device used to dissipate heat either passively or actively 22 - thermal-zones: a container of the following node types used to describe all 23 thermal data for the platform 24 25 This binding describes the thermal-sensor. 26 27 Thermal sensor devices provide temperature sensing capabilities on thermal 28 zones. Typical devices are I2C ADC converters and bandgaps. Thermal sensor 29 devices may control one or more internal sensors. 30 31properties: 32 "#thermal-sensor-cells": 33 description: 34 Used to uniquely identify a thermal sensor instance within an IC. Will be 35 0 on sensor nodes with only a single sensor and at least 1 on nodes 36 containing several internal sensors. 37 enum: [0, 1] 38 39required: 40 - "#thermal-sensor-cells" 41 42additionalProperties: true 43 44examples: 45 - | 46 #include <dt-bindings/interrupt-controller/arm-gic.h> 47 48 // Example 1: SDM845 TSENS 49 soc: soc { 50 #address-cells = <2>; 51 #size-cells = <2>; 52 53 /* ... */ 54 55 tsens0: thermal-sensor@c263000 { 56 compatible = "qcom,sdm845-tsens", "qcom,tsens-v2"; 57 reg = <0 0x0c263000 0 0x1ff>, /* TM */ 58 <0 0x0c222000 0 0x1ff>; /* SROT */ 59 #qcom,sensors = <13>; 60 interrupts = <GIC_SPI 506 IRQ_TYPE_LEVEL_HIGH>, 61 <GIC_SPI 508 IRQ_TYPE_LEVEL_HIGH>; 62 interrupt-names = "uplow", "critical"; 63 #thermal-sensor-cells = <1>; 64 }; 65 66 tsens1: thermal-sensor@c265000 { 67 compatible = "qcom,sdm845-tsens", "qcom,tsens-v2"; 68 reg = <0 0x0c265000 0 0x1ff>, /* TM */ 69 <0 0x0c223000 0 0x1ff>; /* SROT */ 70 #qcom,sensors = <8>; 71 interrupts = <GIC_SPI 507 IRQ_TYPE_LEVEL_HIGH>, 72 <GIC_SPI 509 IRQ_TYPE_LEVEL_HIGH>; 73 interrupt-names = "uplow", "critical"; 74 #thermal-sensor-cells = <1>; 75 }; 76 }; 77... 78