xref: /linux/Documentation/devicetree/bindings/soc/qcom/qcom,saw2.yaml (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/soc/qcom/qcom,saw2.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Qualcomm Subsystem Power Manager / SPM AVS Wrapper 2 (SAW2)

maintainers:
  - Andy Gross <agross@kernel.org>
  - Bjorn Andersson <bjorn.andersson@linaro.org>

description: |
  The Qualcomm Subsystem Power Manager is used to control the peripheral logic
  surrounding the application cores in Qualcomm platforms.

  The SAW2 is a wrapper around the Subsystem Power Manager (SPM) and the
  Adaptive Voltage Scaling (AVS) hardware. The SPM is a programmable
  power-controller that transitions a piece of hardware (like a processor or
  subsystem) into and out of low power modes via a direct connection to
  the PMIC. It can also be wired up to interact with other processors in the
  system, notifying them when a low power state is entered or exited.

properties:
  compatible:
    items:
      - enum:
          - qcom,ipq4019-saw2-cpu
          - qcom,ipq4019-saw2-l2
          - qcom,ipq8064-saw2-cpu
          - qcom,sdm660-gold-saw2-v4.1-l2
          - qcom,sdm660-silver-saw2-v4.1-l2
          - qcom,msm8998-gold-saw2-v4.1-l2
          - qcom,msm8998-silver-saw2-v4.1-l2
          - qcom,msm8909-saw2-v3.0-cpu
          - qcom,msm8916-saw2-v3.0-cpu
          - qcom,msm8939-saw2-v3.0-cpu
          - qcom,msm8226-saw2-v2.1-cpu
          - qcom,msm8226-saw2-v2.1-l2
          - qcom,msm8960-saw2-cpu
          - qcom,msm8974-saw2-v2.1-cpu
          - qcom,msm8974-saw2-v2.1-l2
          - qcom,msm8976-gold-saw2-v2.3-l2
          - qcom,msm8976-silver-saw2-v2.3-l2
          - qcom,apq8084-saw2-v2.1-cpu
          - qcom,apq8084-saw2-v2.1-l2
          - qcom,apq8064-saw2-v1.1-cpu
      - const: qcom,saw2

  reg:
    items:
      - description: Base address and size of the SPM register region
      - description: Base address and size of the alias register region
    minItems: 1

  regulator:
    $ref: /schemas/regulator/regulator.yaml#
    description: Indicates that this SPM device acts as a regulator device
      device for the core (CPU or Cache) the SPM is attached to.

required:
  - compatible
  - reg

additionalProperties: false

examples:
  - |

    /* Example 1: SoC using SAW2 and kpss-acc-v2 CPUIdle */
    cpus {
        #address-cells = <1>;
        #size-cells = <0>;

        cpu@0 {
            compatible = "qcom,kryo";
            device_type = "cpu";
            enable-method = "qcom,kpss-acc-v2";
            qcom,saw = <&saw0>;
            reg = <0x0>;
            operating-points-v2 = <&cpu_opp_table>;
        };
    };

    saw0: power-manager@f9089000 {
        compatible = "qcom,msm8974-saw2-v2.1-cpu", "qcom,saw2";
        reg = <0xf9089000 0x1000>;
    };

  - |

    /*
     * Example 2: New-gen multi cluster SoC using SAW only for L2;
     * This does not require any cpuidle driver, nor any cpu phandle.
     */
    power-manager@17812000 {
        compatible = "qcom,msm8998-gold-saw2-v4.1-l2", "qcom,saw2";
        reg = <0x17812000 0x1000>;
    };

    power-manager@17912000 {
        compatible = "qcom,msm8998-silver-saw2-v4.1-l2", "qcom,saw2";
        reg = <0x17912000 0x1000>;
    };

  - |
    /*
     * Example 3: SAW2 with the bundled regulator definition.
     */
    power-manager@2089000 {
        compatible = "qcom,apq8064-saw2-v1.1-cpu", "qcom,saw2";
        reg = <0x02089000 0x1000>, <0x02009000 0x1000>;

        regulator {
            regulator-min-microvolt = <850000>;
            regulator-max-microvolt = <1300000>;
        };
    };
...