39 lines
1.4 KiB
Plaintext
39 lines
1.4 KiB
Plaintext
Resource Power Manager(RPM)
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RPM is a dedicated hardware engine for managing shared SoC resources,
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which includes buses, clocks, power rails, etc. The goal of RPM is
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to achieve the maximum power savings while satisfying the SoC's
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operational and performance requirements. RPM accepts resource
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requests from multiple RPM masters. It arbitrates and aggregates the
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requests, and configures the shared resources. The RPM masters are
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the application processor, the modem processor, as well as hardware
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accelerators. The RPM driver communicates with the hardware engine using
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SMD.
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The devicetree representation of the SPM block should be:
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Required properties
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- compatible: "qcom,rpm-smd" or "qcom,rpm-glink"
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- rpm-channel-name: The string corresponding to the channel name of the
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peripheral subsystem. Required for both smd and
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glink transports.
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- rpm-channel-type: The interal SMD edge for this subsystem found in
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<soc/qcom/smd.h>
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- qcom,glink-edge: Logical name of the remote subsystem. This is a required
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property when rpm-smd driver using glink as trasport.
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Optional properties
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- rpm-standalone: Allow RPM driver to run in standalone mode irrespective of RPM
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channel presence.
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Example:
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qcom,rpm-smd {
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compatible = "qcom,rpm-smd", "qcom,rpm-glink";
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qcom,rpm-channel-name = "rpm_requests";
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qcom,rpm-channel-type = 15; /* SMD_APPS_RPM */
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qcom,glink-edge = "rpm";
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}
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}
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