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[46.138.84.89]) by smtp.gmail.com with ESMTPSA id h12sm901715ljh.130.2021.05.29.10.10.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 29 May 2021 10:10:39 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Zhang Rui , Daniel Lezcano , Amit Kucheria , Andreas Westman Dorcsak , Maxim Schwalm , Svyatoslav Ryhel , Ihor Didenko , Ion Agorria , Matt Merhar , Peter Geis Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH v3 1/7] dt-bindings: thermal: Add binding for Tegra30 thermal sensor Date: Sat, 29 May 2021 20:09:49 +0300 Message-Id: <20210529170955.32574-2-digetx@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210529170955.32574-1-digetx@gmail.com> References: <20210529170955.32574-1-digetx@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org All NVIDIA Tegra30 SoCs have on-chip sensors which monitor temperature and voltage of the SoC. Sensors also controls CPU x2 freq throttle and emits emergency shutdown signal. TSENSOR has has two separate channels for each sensor placed in a different parts of the SoC. Add binding for the sensor hardware. Reviewed-by: Rob Herring Signed-off-by: Dmitry Osipenko --- .../thermal/nvidia,tegra30-tsensor.yaml | 78 +++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 Documentation/devicetree/bindings/thermal/nvidia,tegra30-tsensor.yaml diff --git a/Documentation/devicetree/bindings/thermal/nvidia,tegra30-tsensor.yaml b/Documentation/devicetree/bindings/thermal/nvidia,tegra30-tsensor.yaml new file mode 100644 index 000000000000..6182090d313c --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/nvidia,tegra30-tsensor.yaml @@ -0,0 +1,78 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/thermal/nvidia,tegra30-tsensor.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVIDIA Tegra30 Thermal Sensor + +maintainers: + - Dmitry Osipenko + - Jon Hunter + - Thierry Reding + +description: | + TSENSOR provides thermal and voltage sensors which monitor temperature + and voltage of the chip. Sensors are placed across the die to gauge the + temperature of the whole chip. The TSENSOR module: + + Generates an interrupt to SW to lower temperature via DVFS on reaching + a certain thermal/voltage threshold. + + Generates a signal to the CAR to reduce CPU frequency by half on reaching + a certain thermal/voltage threshold. + + Generates a signal to the PMC when the temperature reaches dangerously high + levels to reset the chip and sets a flag in the PMC. + + TSENSOR has two channels which monitor two different spots of the SoC. + +properties: + compatible: + const: nvidia,tegra30-tsensor + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + resets: + maxItems: 1 + + interrupts: + maxItems: 1 + + "#thermal-sensor-cells": + const: 1 + + "#cooling-cells": + const: 2 + + assigned-clock-parents: true + assigned-clock-rates: true + assigned-clocks: true + +required: + - compatible + - reg + - clocks + - resets + - interrupts + - "#thermal-sensor-cells" + - "#cooling-cells" + +additionalProperties: false + +examples: + - | + thermal-sensor@70014000 { + compatible = "nvidia,tegra30-tsensor"; + reg = <0x70014000 0x500>; + interrupts = <0 102 4>; + clocks = <&clk 100>; + resets = <&rst 100>; + + #thermal-sensor-cells = <1>; + #cooling-cells = <2>; + };