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64 lines
2.1 KiB
Plaintext
64 lines
2.1 KiB
Plaintext
Qualcomm RPM Clock Controller Binding
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------------------------------------------------
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The RPM is a dedicated hardware engine for managing the shared
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SoC resources in order to keep the lowest power profile. It
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communicates with other hardware subsystems via shared memory
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and accepts clock requests, aggregates the requests and turns
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the clocks on/off or scales them on demand.
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Required properties :
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- compatible : shall contain only one of the following. The generic
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compatible "qcom,rpmcc" should be also included.
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"qcom,rpmcc-mdm9607", "qcom,rpmcc"
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"qcom,rpmcc-msm8660", "qcom,rpmcc"
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"qcom,rpmcc-apq8060", "qcom,rpmcc"
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"qcom,rpmcc-msm8226", "qcom,rpmcc"
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"qcom,rpmcc-msm8916", "qcom,rpmcc"
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"qcom,rpmcc-msm8936", "qcom,rpmcc"
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"qcom,rpmcc-msm8953", "qcom,rpmcc"
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"qcom,rpmcc-msm8974", "qcom,rpmcc"
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"qcom,rpmcc-msm8976", "qcom,rpmcc"
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"qcom,rpmcc-apq8064", "qcom,rpmcc"
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"qcom,rpmcc-ipq806x", "qcom,rpmcc"
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"qcom,rpmcc-msm8992",·"qcom,rpmcc"
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"qcom,rpmcc-msm8994",·"qcom,rpmcc"
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"qcom,rpmcc-msm8996", "qcom,rpmcc"
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"qcom,rpmcc-msm8998", "qcom,rpmcc"
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"qcom,rpmcc-qcm2290", "qcom,rpmcc"
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"qcom,rpmcc-qcs404", "qcom,rpmcc"
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"qcom,rpmcc-sdm660", "qcom,rpmcc"
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"qcom,rpmcc-sm6115", "qcom,rpmcc"
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"qcom,rpmcc-sm6125", "qcom,rpmcc"
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- #clock-cells : shall contain 1
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The clock enumerators are defined in <dt-bindings/clock/qcom,rpmcc.h>
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and come in pairs: FOO_CLK followed by FOO_A_CLK. The latter clock
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is an "active" clock, which means that the consumer only care that the
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clock is available when the apps CPU subsystem is active, i.e. not
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suspended or in deep idle. If it is important that the clock keeps running
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during system suspend, you need to specify the non-active clock, the one
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not containing *_A_* in the enumerator name.
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Example:
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smd {
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compatible = "qcom,smd";
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rpm {
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interrupts = <0 168 1>;
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qcom,ipc = <&apcs 8 0>;
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qcom,smd-edge = <15>;
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rpm_requests {
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compatible = "qcom,rpm-msm8916";
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qcom,smd-channels = "rpm_requests";
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rpmcc: clock-controller {
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compatible = "qcom,rpmcc-msm8916", "qcom,rpmcc";
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#clock-cells = <1>;
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};
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};
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};
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};
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