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clk: qcom: Add support for RPM Clocks
[karo-tx-linux.git] / Documentation / devicetree / bindings / clock / qcom,rpmcc.txt
1 Qualcomm RPM Clock Controller Binding
2 ------------------------------------------------
3 The RPM is a dedicated hardware engine for managing the shared
4 SoC resources in order to keep the lowest power profile. It
5 communicates with other hardware subsystems via shared memory
6 and accepts clock requests, aggregates the requests and turns
7 the clocks on/off or scales them on demand.
8
9 Required properties :
10 - compatible : shall contain only one of the following. The generic
11                compatible "qcom,rpmcc" should be also included.
12
13                         "qcom,rpmcc-msm8916", "qcom,rpmcc"
14                         "qcom,rpmcc-apq8064", "qcom,rpmcc"
15
16 - #clock-cells : shall contain 1
17
18 Example:
19         smd {
20                 compatible = "qcom,smd";
21
22                 rpm {
23                         interrupts = <0 168 1>;
24                         qcom,ipc = <&apcs 8 0>;
25                         qcom,smd-edge = <15>;
26
27                         rpm_requests {
28                                 compatible = "qcom,rpm-msm8916";
29                                 qcom,smd-channels = "rpm_requests";
30
31                                 rpmcc: clock-controller {
32                                         compatible = "qcom,rpmcc-msm8916", "qcom,rpmcc";
33                                         #clock-cells = <1>;
34                                 };
35                         };
36                 };
37         };