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authorDmitry Baryshkov <dmitry.baryshkov@linaro.org>2024-01-02 07:17:21 +0200
committerBjorn Andersson <andersson@kernel.org>2024-02-16 11:30:57 -0600
commitc9491a16e571d7f33e1d00d1ec4ce9b035bb290c (patch)
tree76b5f465b473a27a43c17275ce6bf1385086aab4 /Documentation/devicetree/bindings/arm/msm/qcom,saw2.txt
parentceeaddc19a90039861564d8e1078b778a8f95101 (diff)
dt-bindings: soc: qcom: merge qcom,saw2.txt into qcom,spm.yaml
The Qualcomm SPM / SAW2 device is described in two bindigns files: arm/msm/qcom,saw2.txt and soc/qcom/qcom,spm.yaml. Merge the former into the latter, adding detailed device node description. While we are at it, also rename qcom,spm.yaml to qcom,saw2.yaml to follow the actual compatible used for these devices. The regulator property is retained as is. It will be changed in the later patches. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20240102-saw2-spm-regulator-v7-1-0472ec237f49@linaro.org Signed-off-by: Bjorn Andersson <andersson@kernel.org>
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-SPM AVS Wrapper 2 (SAW2)
-
-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.
-
-Multiple revisions of the SAW hardware are supported using these Device Nodes.
-SAW2 revisions differ in the register offset and configuration data. Also, the
-same revision of the SAW in different SoCs may have different configuration
-data due the differences in hardware capabilities. Hence the SoC name, the
-version of the SAW hardware in that SoC and the distinction between cpu (big
-or Little) or cache, may be needed to uniquely identify the SAW register
-configuration and initialization data. The compatible string is used to
-indicate this parameter.
-
-PROPERTIES
-
-- compatible:
- Usage: required
- Value type: <string>
- Definition: Must have
- "qcom,saw2"
- A more specific value could be one of:
- "qcom,apq8064-saw2-v1.1-cpu"
- "qcom,msm8226-saw2-v2.1-cpu"
- "qcom,msm8974-saw2-v2.1-cpu"
- "qcom,apq8084-saw2-v2.1-cpu"
-
-- reg:
- Usage: required
- Value type: <prop-encoded-array>
- Definition: the first element specifies the base address and size of
- the register region. An optional second element specifies
- the base address and size of the alias register region.
-
-- regulator:
- Usage: optional
- Value type: boolean
- Definition: Indicates that this SPM device acts as a regulator device
- device for the core (CPU or Cache) the SPM is attached
- to.
-
-Example 1:
-
- power-controller@2099000 {
- compatible = "qcom,saw2";
- reg = <0x02099000 0x1000>, <0x02009000 0x1000>;
- regulator;
- };
-
-Example 2:
- saw0: power-controller@f9089000 {
- compatible = "qcom,apq8084-saw2-v2.1-cpu", "qcom,saw2";
- reg = <0xf9089000 0x1000>, <0xf9009000 0x1000>;
- };