38 lines
1.1 KiB
Plaintext
38 lines
1.1 KiB
Plaintext
Command DB
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---------
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Command DB is a database that provides a mapping between resource key and the
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resource address for a system resource managed by a remote processor. The data
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is stored in a shared memory region and is loaded by the remote processor.
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Some of the Qualcomm Technologies Inc SoC's have hardware accelerators for
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controlling shared resources. Depending on the board configuration the shared
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resource properties may change. These properties are dynamically probed by the
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remote processor and made available in the shared memory.
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The bindings for Command DB is specified in the reserved-memory section in
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devicetree. The devicetree representation of the command DB driver should be:
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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,cmd-db"
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- reg:
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Usage: required
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Value type: <prop encoded array>
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Definition: The register address that points to the actual location of
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the Command DB in memory.
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Example:
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reserved-memory {
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[...]
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reserved-memory@85fe0000 {
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reg = <0x0 0x85fe0000 0x0 0x20000>;
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compatible = "qcom,cmd-db";
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no-map;
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};
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};
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