Documentation/devicetree/bindings/soc/qcom/qcom,spm.yaml

   1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: "http://devicetree.org/schemas/soc/qcom/qcom,spm.yaml#"
   5 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
   6
   7 title: Qualcomm Subsystem Power Manager binding
   8
   9 maintainers:
  10   - Andy Gross <agross@kernel.org>
  11   - Bjorn Andersson <bjorn.andersson@linaro.org>
  12
  13 description: |
  14   This binding describes the Qualcomm Subsystem Power Manager, used to control
  15   the peripheral logic surrounding the application cores in Qualcomm platforms.
  16
  17 properties:
  18   compatible:
  19     items:
  20       - enum:
  21           - qcom,sdm660-gold-saw2-v4.1-l2
  22           - qcom,sdm660-silver-saw2-v4.1-l2
  23           - qcom,msm8998-gold-saw2-v4.1-l2
  24           - qcom,msm8998-silver-saw2-v4.1-l2
  25           - qcom,msm8909-saw2-v3.0-cpu
  26           - qcom,msm8916-saw2-v3.0-cpu
  27           - qcom,msm8226-saw2-v2.1-cpu
  28           - qcom,msm8974-saw2-v2.1-cpu
  29           - qcom,apq8084-saw2-v2.1-cpu
  30           - qcom,apq8064-saw2-v1.1-cpu
  31       - const: qcom,saw2
  32
  33   reg:
  34     description: Base address and size of the SPM register region
  35     maxItems: 1
  36
  37 required:
  38   - compatible
  39   - reg
  40
  41 additionalProperties: false
  42
  43 examples:
  44   - |
  45
  46     /* Example 1: SoC using SAW2 and kpss-acc-v2 CPUIdle */
  47     cpus {
  48         #address-cells = <1>;
  49         #size-cells = <0>;
  50
  51         cpu@0 {
  52             compatible = "qcom,kryo";
  53             device_type = "cpu";
  54             enable-method = "qcom,kpss-acc-v2";
  55             qcom,saw = <&saw0>;
  56             reg = <0x0>;
  57             operating-points-v2 = <&cpu_opp_table>;
  58         };
  59     };
  60
  61     saw0: power-manager@f9089000 {
  62         compatible = "qcom,msm8974-saw2-v2.1-cpu", "qcom,saw2";
  63         reg = <0xf9089000 0x1000>;
  64     };
  65
  66   - |
  67
  68     /*
  69      * Example 2: New-gen multi cluster SoC using SAW only for L2;
  70      * This does not require any cpuidle driver, nor any cpu phandle.
  71      */
  72     power-manager@17812000 {
  73         compatible = "qcom,msm8998-gold-saw2-v4.1-l2", "qcom,saw2";
  74         reg = <0x17812000 0x1000>;
  75     };
  76
  77     power-manager@17912000 {
  78         compatible = "qcom,msm8998-silver-saw2-v4.1-l2", "qcom,saw2";
  79         reg = <0x17912000 0x1000>;
  80     };
  81
  82 ...