linux/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml

# SPDX-License-Identifier: (GPL-2.0 OR MIT)
# Copyright 2019 Linaro Ltd.
%YAML 1.2
---
$id: http://devicetree.org/schemas/thermal/qcom-tsens.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: QCOM SoC Temperature Sensor (TSENS)

maintainers:
  - Amit Kucheria <amit.kucheria@linaro.org>

description: |
  QCOM SoCs have TSENS IP to allow temperature measurement. There are currently
  three distinct major versions of the IP that is supported by a single driver.
  The IP versions are named v0.1, v1 and v2 in the driver, where v0.1 captures
  everything before v1 when there was no versioning information.  

properties:
  compatible:
    oneOf:
      - description: v0.1 of TSENS
        items:
          - enum:
              - qcom,msm8916-tsens
              - qcom,msm8974-tsens
          - const: qcom,tsens-v0_1

      - description: v1 of TSENS
        items:
          - enum:
              - qcom,msm8976-tsens
              - qcom,qcs404-tsens
          - const: qcom,tsens-v1

      - description: v2 of TSENS
        items:
          - enum:
              - qcom,msm8996-tsens
              - qcom,msm8998-tsens
              - qcom,sc7180-tsens
              - qcom,sdm845-tsens
          - const: qcom,tsens-v2

  reg:
    items:
      - description: TM registers
      - description: SROT registers

  interrupts:
    minItems: 1
    items:
      - description: Combined interrupt if upper or lower threshold crossed
      - description: Interrupt if critical threshold crossed

  interrupt-names:
    minItems: 1
    items:
      - const: uplow
      - const: critical

  nvmem-cells:
    minItems: 1
    maxItems: 2
    description:
      Reference to an nvmem node for the calibration data

  nvmem-cell-names:
    minItems: 1
    maxItems: 2
    items:
      - const: calib
      - const: calib_sel

  "#qcom,sensors":
    allOf:
      - $ref: /schemas/types.yaml#/definitions/uint32
      - minimum: 1
      - maximum: 16
    description:
      Number of sensors enabled on this platform

  "#thermal-sensor-cells":
    const: 1
    description:
      Number of cells required to uniquely identify the thermal sensors. Since
      we have multiple sensors this is set to 1

allOf:
  - if:
      properties:
        compatible:
          contains:
            enum:
              - qcom,msm8916-tsens
              - qcom,msm8974-tsens
              - qcom,msm8976-tsens
              - qcom,qcs404-tsens
              - qcom,tsens-v0_1
              - qcom,tsens-v1
    then:
      properties:
        interrupts:
          maxItems: 1
        interrupt-names:
          maxItems: 1

    else:
      properties:
        interrupts:
          minItems: 2
        interrupt-names:
          minItems: 2

required:
  - compatible
  - reg
  - "#qcom,sensors"
  - interrupts
  - interrupt-names
  - "#thermal-sensor-cells"

additionalProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    // Example 1 (legacy: for pre v1 IP):
    tsens1: thermal-sensor@900000 {
           compatible = "qcom,msm8916-tsens", "qcom,tsens-v0_1";
           reg = <0x4a9000 0x1000>, /* TM */
                 <0x4a8000 0x1000>; /* SROT */

           nvmem-cells = <&tsens_caldata>, <&tsens_calsel>;
           nvmem-cell-names = "calib", "calib_sel";

           interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
           interrupt-names = "uplow";

           #qcom,sensors = <5>;
           #thermal-sensor-cells = <1>;
    };    

  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    // Example 2 (for any platform containing v1 of the TSENS IP):
    tsens2: thermal-sensor@4a9000 {
          compatible = "qcom,qcs404-tsens", "qcom,tsens-v1";
          reg = <0x004a9000 0x1000>, /* TM */
                <0x004a8000 0x1000>; /* SROT */

          nvmem-cells = <&tsens_caldata>;
          nvmem-cell-names = "calib";

          interrupts = <GIC_SPI 506 IRQ_TYPE_LEVEL_HIGH>;
          interrupt-names = "uplow";

          #qcom,sensors = <10>;
          #thermal-sensor-cells = <1>;
    };    

  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    // Example 3 (for any platform containing v2 of the TSENS IP):
    tsens3: thermal-sensor@c263000 {
           compatible = "qcom,sdm845-tsens", "qcom,tsens-v2";
           reg = <0xc263000 0x1ff>,
                 <0xc222000 0x1ff>;

           interrupts = <GIC_SPI 506 IRQ_TYPE_LEVEL_HIGH>,
                        <GIC_SPI 508 IRQ_TYPE_LEVEL_HIGH>;
           interrupt-names = "uplow", "critical";

           #qcom,sensors = <13>;
           #thermal-sensor-cells = <1>;
    };    
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