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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/arm/msm/qcom,saw2.txt | |
parent | Initial commit. (diff) | |
download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | Documentation/devicetree/bindings/arm/msm/qcom,saw2.txt | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/msm/qcom,saw2.txt b/Documentation/devicetree/bindings/arm/msm/qcom,saw2.txt new file mode 100644 index 000000000..ae4afc6dc --- /dev/null +++ b/Documentation/devicetree/bindings/arm/msm/qcom,saw2.txt @@ -0,0 +1,57 @@ +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 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,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>; + }; |