1Qualcomm RPM Clock Controller Binding 2------------------------------------------------ 3The RPM is a dedicated hardware engine for managing the shared 4SoC resources in order to keep the lowest power profile. It 5communicates with other hardware subsystems via shared memory 6and accepts clock requests, aggregates the requests and turns 7the clocks on/off or scales them on demand. 8 9Required properties : 10- compatible : shall contain only one of the following. The generic 11 compatible "qcom,rpmcc" should be also included. 12 13 "qcom,rpmcc-msm8660", "qcom,rpmcc" 14 "qcom,rpmcc-apq8060", "qcom,rpmcc" 15 "qcom,rpmcc-msm8916", "qcom,rpmcc" 16 "qcom,rpmcc-msm8936", "qcom,rpmcc" 17 "qcom,rpmcc-msm8974", "qcom,rpmcc" 18 "qcom,rpmcc-msm8976", "qcom,rpmcc" 19 "qcom,rpmcc-apq8064", "qcom,rpmcc" 20 "qcom,rpmcc-ipq806x", "qcom,rpmcc" 21 "qcom,rpmcc-msm8992",·"qcom,rpmcc" 22 "qcom,rpmcc-msm8994",·"qcom,rpmcc" 23 "qcom,rpmcc-msm8996", "qcom,rpmcc" 24 "qcom,rpmcc-msm8998", "qcom,rpmcc" 25 "qcom,rpmcc-qcs404", "qcom,rpmcc" 26 "qcom,rpmcc-sdm660", "qcom,rpmcc" 27 28- #clock-cells : shall contain 1 29 30The clock enumerators are defined in <dt-bindings/clock/qcom,rpmcc.h> 31and come in pairs: FOO_CLK followed by FOO_A_CLK. The latter clock 32is an "active" clock, which means that the consumer only care that the 33clock is available when the apps CPU subsystem is active, i.e. not 34suspended or in deep idle. If it is important that the clock keeps running 35during system suspend, you need to specify the non-active clock, the one 36not containing *_A_* in the enumerator name. 37 38Example: 39 smd { 40 compatible = "qcom,smd"; 41 42 rpm { 43 interrupts = <0 168 1>; 44 qcom,ipc = <&apcs 8 0>; 45 qcom,smd-edge = <15>; 46 47 rpm_requests { 48 compatible = "qcom,rpm-msm8916"; 49 qcom,smd-channels = "rpm_requests"; 50 51 rpmcc: clock-controller { 52 compatible = "qcom,rpmcc-msm8916", "qcom,rpmcc"; 53 #clock-cells = <1>; 54 }; 55 }; 56 }; 57 }; 58