1354d7675SEmmanuel Vadot# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2354d7675SEmmanuel Vadot# Copyright 2021 Linaro Ltd. 3354d7675SEmmanuel Vadot%YAML 1.2 4354d7675SEmmanuel Vadot--- 5354d7675SEmmanuel Vadot$id: http://devicetree.org/schemas/thermal/qcom-lmh.yaml# 6354d7675SEmmanuel Vadot$schema: http://devicetree.org/meta-schemas/core.yaml# 7354d7675SEmmanuel Vadot 8354d7675SEmmanuel Vadottitle: Qualcomm Limits Management Hardware(LMh) 9354d7675SEmmanuel Vadot 10354d7675SEmmanuel Vadotmaintainers: 11354d7675SEmmanuel Vadot - Thara Gopinath <thara.gopinath@linaro.org> 12354d7675SEmmanuel Vadot 13354d7675SEmmanuel Vadotdescription: 14354d7675SEmmanuel Vadot Limits Management Hardware(LMh) is a hardware infrastructure on some 15354d7675SEmmanuel Vadot Qualcomm SoCs that can enforce temperature and current limits as 16354d7675SEmmanuel Vadot programmed by software for certain IPs like CPU. 17354d7675SEmmanuel Vadot 18354d7675SEmmanuel Vadotproperties: 19354d7675SEmmanuel Vadot compatible: 20354d7675SEmmanuel Vadot enum: 21354d7675SEmmanuel Vadot - qcom,sdm845-lmh 22*c9ccf3a3SEmmanuel Vadot - qcom,sm8150-lmh 23354d7675SEmmanuel Vadot 24354d7675SEmmanuel Vadot reg: 25354d7675SEmmanuel Vadot items: 26354d7675SEmmanuel Vadot - description: core registers 27354d7675SEmmanuel Vadot 28354d7675SEmmanuel Vadot interrupts: 29354d7675SEmmanuel Vadot maxItems: 1 30354d7675SEmmanuel Vadot 31354d7675SEmmanuel Vadot '#interrupt-cells': 32354d7675SEmmanuel Vadot const: 1 33354d7675SEmmanuel Vadot 34354d7675SEmmanuel Vadot interrupt-controller: true 35354d7675SEmmanuel Vadot 36354d7675SEmmanuel Vadot cpus: 37354d7675SEmmanuel Vadot description: 38354d7675SEmmanuel Vadot phandle of the first cpu in the LMh cluster 39354d7675SEmmanuel Vadot $ref: /schemas/types.yaml#/definitions/phandle 40354d7675SEmmanuel Vadot 41354d7675SEmmanuel Vadot qcom,lmh-temp-arm-millicelsius: 42354d7675SEmmanuel Vadot description: 43354d7675SEmmanuel Vadot An integer expressing temperature threshold at which the LMh thermal 44354d7675SEmmanuel Vadot FSM is engaged. 45354d7675SEmmanuel Vadot 46354d7675SEmmanuel Vadot qcom,lmh-temp-low-millicelsius: 47354d7675SEmmanuel Vadot description: 48354d7675SEmmanuel Vadot An integer expressing temperature threshold at which the state machine 49354d7675SEmmanuel Vadot will attempt to remove frequency throttling. 50354d7675SEmmanuel Vadot 51354d7675SEmmanuel Vadot qcom,lmh-temp-high-millicelsius: 52354d7675SEmmanuel Vadot description: 53354d7675SEmmanuel Vadot An integer expressing temperature threshold at which the state machine 54354d7675SEmmanuel Vadot will attempt to throttle the frequency. 55354d7675SEmmanuel Vadot 56354d7675SEmmanuel Vadotrequired: 57354d7675SEmmanuel Vadot - compatible 58354d7675SEmmanuel Vadot - reg 59354d7675SEmmanuel Vadot - interrupts 60354d7675SEmmanuel Vadot - '#interrupt-cells' 61354d7675SEmmanuel Vadot - interrupt-controller 62354d7675SEmmanuel Vadot - cpus 63354d7675SEmmanuel Vadot - qcom,lmh-temp-arm-millicelsius 64354d7675SEmmanuel Vadot - qcom,lmh-temp-low-millicelsius 65354d7675SEmmanuel Vadot - qcom,lmh-temp-high-millicelsius 66354d7675SEmmanuel Vadot 67354d7675SEmmanuel VadotadditionalProperties: false 68354d7675SEmmanuel Vadot 69354d7675SEmmanuel Vadotexamples: 70354d7675SEmmanuel Vadot - | 71354d7675SEmmanuel Vadot #include <dt-bindings/interrupt-controller/arm-gic.h> 72354d7675SEmmanuel Vadot 73354d7675SEmmanuel Vadot lmh@17d70800 { 74354d7675SEmmanuel Vadot compatible = "qcom,sdm845-lmh"; 75354d7675SEmmanuel Vadot reg = <0x17d70800 0x400>; 76354d7675SEmmanuel Vadot interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>; 77354d7675SEmmanuel Vadot cpus = <&CPU4>; 78354d7675SEmmanuel Vadot qcom,lmh-temp-arm-millicelsius = <65000>; 79354d7675SEmmanuel Vadot qcom,lmh-temp-low-millicelsius = <94500>; 80354d7675SEmmanuel Vadot qcom,lmh-temp-high-millicelsius = <95000>; 81354d7675SEmmanuel Vadot interrupt-controller; 82354d7675SEmmanuel Vadot #interrupt-cells = <1>; 83354d7675SEmmanuel Vadot }; 84