162306a36Sopenharmony_ci# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 262306a36Sopenharmony_ci%YAML 1.2 362306a36Sopenharmony_ci--- 462306a36Sopenharmony_ci$id: http://devicetree.org/schemas/thermal/nvidia,tegra30-tsensor.yaml# 562306a36Sopenharmony_ci$schema: http://devicetree.org/meta-schemas/core.yaml# 662306a36Sopenharmony_ci 762306a36Sopenharmony_cititle: NVIDIA Tegra30 Thermal Sensor 862306a36Sopenharmony_ci 962306a36Sopenharmony_cimaintainers: 1062306a36Sopenharmony_ci - Dmitry Osipenko <digetx@gmail.com> 1162306a36Sopenharmony_ci - Jon Hunter <jonathanh@nvidia.com> 1262306a36Sopenharmony_ci - Thierry Reding <thierry.reding@gmail.com> 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_cidescription: | 1562306a36Sopenharmony_ci TSENSOR provides thermal and voltage sensors which monitor temperature 1662306a36Sopenharmony_ci and voltage of the chip. Sensors are placed across the die to gauge the 1762306a36Sopenharmony_ci temperature of the whole chip. The TSENSOR module: 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci Generates an interrupt to SW to lower temperature via DVFS on reaching 2062306a36Sopenharmony_ci a certain thermal/voltage threshold. 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ci Generates a signal to the CAR to reduce CPU frequency by half on reaching 2362306a36Sopenharmony_ci a certain thermal/voltage threshold. 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ci Generates a signal to the PMC when the temperature reaches dangerously high 2662306a36Sopenharmony_ci levels to reset the chip and sets a flag in the PMC. 2762306a36Sopenharmony_ci 2862306a36Sopenharmony_ci TSENSOR has two channels which monitor two different spots of the SoC. 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ciproperties: 3162306a36Sopenharmony_ci compatible: 3262306a36Sopenharmony_ci const: nvidia,tegra30-tsensor 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci reg: 3562306a36Sopenharmony_ci maxItems: 1 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci clocks: 3862306a36Sopenharmony_ci maxItems: 1 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ci resets: 4162306a36Sopenharmony_ci maxItems: 1 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_ci interrupts: 4462306a36Sopenharmony_ci maxItems: 1 4562306a36Sopenharmony_ci 4662306a36Sopenharmony_ci "#thermal-sensor-cells": 4762306a36Sopenharmony_ci const: 1 4862306a36Sopenharmony_ci 4962306a36Sopenharmony_ci assigned-clock-parents: true 5062306a36Sopenharmony_ci assigned-clock-rates: true 5162306a36Sopenharmony_ci assigned-clocks: true 5262306a36Sopenharmony_ci 5362306a36Sopenharmony_cirequired: 5462306a36Sopenharmony_ci - compatible 5562306a36Sopenharmony_ci - reg 5662306a36Sopenharmony_ci - clocks 5762306a36Sopenharmony_ci - resets 5862306a36Sopenharmony_ci - interrupts 5962306a36Sopenharmony_ci - "#thermal-sensor-cells" 6062306a36Sopenharmony_ci 6162306a36Sopenharmony_ciadditionalProperties: false 6262306a36Sopenharmony_ci 6362306a36Sopenharmony_ciexamples: 6462306a36Sopenharmony_ci - | 6562306a36Sopenharmony_ci thermal-sensor@70014000 { 6662306a36Sopenharmony_ci compatible = "nvidia,tegra30-tsensor"; 6762306a36Sopenharmony_ci reg = <0x70014000 0x500>; 6862306a36Sopenharmony_ci interrupts = <0 102 4>; 6962306a36Sopenharmony_ci clocks = <&clk 100>; 7062306a36Sopenharmony_ci resets = <&rst 100>; 7162306a36Sopenharmony_ci 7262306a36Sopenharmony_ci #thermal-sensor-cells = <1>; 7362306a36Sopenharmony_ci }; 74