120 lines
3.5 KiB
YAML
120 lines
3.5 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/soc/qcom/qcom,saw2.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Qualcomm Subsystem Power Manager / SPM AVS Wrapper 2 (SAW2)
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maintainers:
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- Andy Gross <agross@kernel.org>
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- Bjorn Andersson <bjorn.andersson@linaro.org>
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description: |
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The Qualcomm Subsystem Power Manager is used to control the peripheral logic
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surrounding the application cores in Qualcomm platforms.
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The SAW2 is a wrapper around the Subsystem Power Manager (SPM) and the
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Adaptive Voltage Scaling (AVS) hardware. The SPM is a programmable
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power-controller that transitions a piece of hardware (like a processor or
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subsystem) into and out of low power modes via a direct connection to
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the PMIC. It can also be wired up to interact with other processors in the
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system, notifying them when a low power state is entered or exited.
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properties:
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compatible:
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items:
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- enum:
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- qcom,ipq4019-saw2-cpu
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- qcom,ipq4019-saw2-l2
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- qcom,ipq8064-saw2-cpu
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- qcom,sdm660-gold-saw2-v4.1-l2
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- qcom,sdm660-silver-saw2-v4.1-l2
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- qcom,msm8998-gold-saw2-v4.1-l2
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- qcom,msm8998-silver-saw2-v4.1-l2
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- qcom,msm8909-saw2-v3.0-cpu
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- qcom,msm8916-saw2-v3.0-cpu
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- qcom,msm8939-saw2-v3.0-cpu
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- qcom,msm8226-saw2-v2.1-cpu
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- qcom,msm8226-saw2-v2.1-l2
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- qcom,msm8960-saw2-cpu
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- qcom,msm8974-saw2-v2.1-cpu
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- qcom,msm8974-saw2-v2.1-l2
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- qcom,msm8976-gold-saw2-v2.3-l2
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- qcom,msm8976-silver-saw2-v2.3-l2
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- qcom,apq8084-saw2-v2.1-cpu
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- qcom,apq8084-saw2-v2.1-l2
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- qcom,apq8064-saw2-v1.1-cpu
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- const: qcom,saw2
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reg:
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items:
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- description: Base address and size of the SPM register region
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- description: Base address and size of the alias register region
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minItems: 1
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regulator:
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$ref: /schemas/regulator/regulator.yaml#
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description: Indicates that this SPM device acts as a regulator device
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device for the core (CPU or Cache) the SPM is attached to.
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required:
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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/* Example 1: SoC using SAW2 and kpss-acc-v2 CPUIdle */
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cpus {
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#address-cells = <1>;
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#size-cells = <0>;
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cpu@0 {
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compatible = "qcom,kryo";
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device_type = "cpu";
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enable-method = "qcom,kpss-acc-v2";
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qcom,saw = <&saw0>;
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reg = <0x0>;
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operating-points-v2 = <&cpu_opp_table>;
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};
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};
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saw0: power-manager@f9089000 {
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compatible = "qcom,msm8974-saw2-v2.1-cpu", "qcom,saw2";
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reg = <0xf9089000 0x1000>;
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};
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- |
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/*
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* Example 2: New-gen multi cluster SoC using SAW only for L2;
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* This does not require any cpuidle driver, nor any cpu phandle.
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*/
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power-manager@17812000 {
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compatible = "qcom,msm8998-gold-saw2-v4.1-l2", "qcom,saw2";
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reg = <0x17812000 0x1000>;
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};
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power-manager@17912000 {
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compatible = "qcom,msm8998-silver-saw2-v4.1-l2", "qcom,saw2";
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reg = <0x17912000 0x1000>;
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};
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- |
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/*
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* Example 3: SAW2 with the bundled regulator definition.
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*/
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power-manager@2089000 {
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compatible = "qcom,apq8064-saw2-v1.1-cpu", "qcom,saw2";
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reg = <0x02089000 0x1000>, <0x02009000 0x1000>;
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regulator {
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regulator-min-microvolt = <850000>;
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regulator-max-microvolt = <1300000>;
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};
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};
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...
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