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dt-bindings: thermal: Add yaml bindings for thermal sensors

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As part of moving the thermal bindings to YAML, split it up into 3
bindings: thermal sensors, cooling devices and thermal zones.

The property #thermal-sensor-cells is required in each device that acts
as a thermal sensor. It is used to uniquely identify the instance of the
thermal sensor inside the system.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/a91b5603caea5b8854cc9f5325448e4c7228c328.1585748882.git.amit.kucheria@linaro.org
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Amit Kucheria 2020-04-03 12:31:46 +05:30 committed by Daniel Lezcano
parent fc7a3d9e9c
commit c1bba2c94d
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Documentation/devicetree/bindings/thermal/thermal-sensor.yaml Normal file
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# SPDX-License-Identifier: (GPL-2.0)
# Copyright 2020 Linaro Ltd.
%YAML 1.2
---
$id: http://devicetree.org/schemas/thermal/thermal-sensor.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Thermal sensor binding
maintainers:
- Amit Kucheria <amitk@kernel.org>
description: |
Thermal management is achieved in devicetree by describing the sensor hardware
and the software abstraction of thermal zones required to take appropriate
action to mitigate thermal overloads.
The following node types are used to completely describe a thermal management
system in devicetree:
- thermal-sensor: device that measures temperature, has SoC-specific bindings
- cooling-device: device used to dissipate heat either passively or actively
- thermal-zones: a container of the following node types used to describe all
thermal data for the platform
This binding describes the thermal-sensor.
Thermal sensor devices provide temperature sensing capabilities on thermal
zones. Typical devices are I2C ADC converters and bandgaps. Thermal sensor
devices may control one or more internal sensors.
properties:
"#thermal-sensor-cells":
description:
Used to uniquely identify a thermal sensor instance within an IC. Will be
0 on sensor nodes with only a single sensor and at least 1 on nodes
containing several internal sensors.
enum: [0, 1]
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
// Example 1: SDM845 TSENS
soc: soc@0 {
#address-cells = <2>;
#size-cells = <2>;
/* ... */
tsens0: thermal-sensor@c263000 {
compatible = "qcom,sdm845-tsens", "qcom,tsens-v2";
reg = <0 0x0c263000 0 0x1ff>, /* TM */
<0 0x0c222000 0 0x1ff>; /* SROT */
#qcom,sensors = <13>;
interrupts = <GIC_SPI 506 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 508 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = "uplow", "critical";
#thermal-sensor-cells = <1>;
};
tsens1: thermal-sensor@c265000 {
compatible = "qcom,sdm845-tsens", "qcom,tsens-v2";
reg = <0 0x0c265000 0 0x1ff>, /* TM */
<0 0x0c223000 0 0x1ff>; /* SROT */
#qcom,sensors = <8>;
interrupts = <GIC_SPI 507 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 509 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = "uplow", "critical";
#thermal-sensor-cells = <1>;
};
};
...