52 lines
1.4 KiB
Text
52 lines
1.4 KiB
Text
Userspace cooling devices.
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Certain Cooling devices reside in userspace and they also needs to be
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mitigated for thermal conditions. Thermal framework will send netlink message
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to userspace, when a cooling device level changes for any cooling device.
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This cooling device expects the userspace cooling device to listen to the
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netlink message and take necessary action.
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Devicetree will define the name of the cooling device and the max mitigation
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level a cooling device can support. Each child node will be an individual
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cooling device.
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Properties:
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- compatible:
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Usage: required
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Value type: <string>
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Definition: should be "qcom,userspace-cooling-devices"
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Subsystem properties:
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Minimum one child node is required. Child node name is used as
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cooling device name and phandle for that cooling device.
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Cooling device node properties:
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-qcom,max-level:
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Usage: required
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Value type: <integer>
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Definition: The max level this cooling device can support.
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The cooling device levels start from 0 to max level
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inclusive.
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-#cooling-cells:
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Usage: optional
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Value type: <integer>
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Definition: Must be 2. Needed for of_thermal as cooling device
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identifier. Please refer to
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<devicetree/bindings/thermal/thermal.txt> for more
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details.
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Example:
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qcom,userspace-cdev {
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compatible = "qcom,userspace-cooling-devices";
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display_fps: display-fps {
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qcom,max-level = <4>;
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/*levels supported
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* 0, 1, 2, 3, 4
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*/
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#cooling-cells = <2>;
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};
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};
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