xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/soc/qcom/qcom,spm.yaml

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

title: Qualcomm Subsystem Power Manager

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

description: |
  This binding describes the Qualcomm Subsystem Power Manager, used to control
  the peripheral logic surrounding the application cores in Qualcomm platforms.

properties:
  compatible:
    items:
      - enum:
          - 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,msm8974-saw2-v2.1-cpu
          - qcom,msm8976-gold-saw2-v2.3-l2
          - qcom,msm8976-silver-saw2-v2.3-l2
          - qcom,apq8084-saw2-v2.1-cpu
          - qcom,apq8064-saw2-v1.1-cpu
      - const: qcom,saw2

  reg:
    description: Base address and size of the SPM register region
    maxItems: 1

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>;
    };

...