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Diffstat (limited to 'Documentation/devicetree/bindings/soc/qcom/qcom,saw2.yaml')
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diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,saw2.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,saw2.yaml new file mode 100644 index 000000000000..ca4bce817273 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,saw2.yaml @@ -0,0 +1,119 @@ +# 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>; + }; + }; +... |