1 # SPDX-License-Identifier: (GPL-2.0-only OR BS 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/thermal/nvi 4 $id: http://devicetree.org/schemas/thermal/nvidia,tegra30-tsensor.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: NVIDIA Tegra30 Thermal Sensor 7 title: NVIDIA Tegra30 Thermal Sensor
8 8
9 maintainers: 9 maintainers:
10 - Dmitry Osipenko <digetx@gmail.com> 10 - Dmitry Osipenko <digetx@gmail.com>
11 - Jon Hunter <jonathanh@nvidia.com> 11 - Jon Hunter <jonathanh@nvidia.com>
12 - Thierry Reding <thierry.reding@gmail.com> 12 - Thierry Reding <thierry.reding@gmail.com>
13 13
14 description: | 14 description: |
15 TSENSOR provides thermal and voltage sensors 15 TSENSOR provides thermal and voltage sensors which monitor temperature
16 and voltage of the chip. Sensors are placed 16 and voltage of the chip. Sensors are placed across the die to gauge the
17 temperature of the whole chip. The TSENSOR m 17 temperature of the whole chip. The TSENSOR module:
18 18
19 Generates an interrupt to SW to lower temp 19 Generates an interrupt to SW to lower temperature via DVFS on reaching
20 a certain thermal/voltage threshold. 20 a certain thermal/voltage threshold.
21 21
22 Generates a signal to the CAR to reduce CP 22 Generates a signal to the CAR to reduce CPU frequency by half on reaching
23 a certain thermal/voltage threshold. 23 a certain thermal/voltage threshold.
24 24
25 Generates a signal to the PMC when the tem 25 Generates a signal to the PMC when the temperature reaches dangerously high
26 levels to reset the chip and sets a flag i 26 levels to reset the chip and sets a flag in the PMC.
27 27
28 TSENSOR has two channels which monitor two d 28 TSENSOR has two channels which monitor two different spots of the SoC.
29 29
30 $ref: thermal-sensor.yaml# 30 $ref: thermal-sensor.yaml#
31 31
32 properties: 32 properties:
33 compatible: 33 compatible:
34 const: nvidia,tegra30-tsensor 34 const: nvidia,tegra30-tsensor
35 35
36 reg: 36 reg:
37 maxItems: 1 37 maxItems: 1
38 38
39 clocks: 39 clocks:
40 maxItems: 1 40 maxItems: 1
41 41
42 resets: 42 resets:
43 maxItems: 1 43 maxItems: 1
44 44
45 interrupts: 45 interrupts:
46 maxItems: 1 46 maxItems: 1
47 47
48 "#thermal-sensor-cells": 48 "#thermal-sensor-cells":
49 const: 1 49 const: 1
50 50
51 required: 51 required:
52 - compatible 52 - compatible
53 - reg 53 - reg
54 - clocks 54 - clocks
55 - resets 55 - resets
56 - interrupts 56 - interrupts
57 57
58 unevaluatedProperties: false 58 unevaluatedProperties: false
59 59
60 examples: 60 examples:
61 - | 61 - |
62 thermal-sensor@70014000 { 62 thermal-sensor@70014000 {
63 compatible = "nvidia,tegra30-tsensor"; 63 compatible = "nvidia,tegra30-tsensor";
64 reg = <0x70014000 0x500>; 64 reg = <0x70014000 0x500>;
65 interrupts = <0 102 4>; 65 interrupts = <0 102 4>;
66 clocks = <&clk 100>; 66 clocks = <&clk 100>;
67 resets = <&rst 100>; 67 resets = <&rst 100>;
68 68
69 #thermal-sensor-cells = <1>; 69 #thermal-sensor-cells = <1>;
70 }; 70 };
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