On Thu, 5 Mar 2020 at 13:56, Amit Kucheria <amit.kucheria@xxxxxxxxxx> wrote: > > 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@xxxxxxxxxx> > --- > .../bindings/thermal/thermal-sensor.yaml | 72 +++++++++++++++++++ > 1 file changed, 72 insertions(+) > create mode 100644 Documentation/devicetree/bindings/thermal/thermal-sensor.yaml > > diff --git a/Documentation/devicetree/bindings/thermal/thermal-sensor.yaml b/Documentation/devicetree/bindings/thermal/thermal-sensor.yaml > new file mode 100644 > index 0000000000000..920ee7667591d > --- /dev/null > +++ b/Documentation/devicetree/bindings/thermal/thermal-sensor.yaml > @@ -0,0 +1,72 @@ > +# 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@xxxxxxxxxx> > + > +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 artively typo: s/artively/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>; > + }; > + }; > +... > -- > 2.20.1 >
