Documentation/devicetree/bindings/soc/qcom/qcom,smd-rpm.txt

   1 Qualcomm Resource Power Manager (RPM) over SMD
   2
   3 This driver is used to interface with the Resource Power Manager (RPM) found in
   4 various Qualcomm platforms. The RPM allows each component in the system to vote
   5 for state of the system resources, such as clocks, regulators and bus
   6 frequencies.
   7
   8 The SMD information for the RPM edge should be filled out.  See qcom,smd.txt for
   9 the required edge properties.  All SMD related properties will reside within the
  10 RPM node itself.
  11
  12 = SUBDEVICES
  13
  14 The RPM exposes resources to its subnodes.  The rpm_requests node must be
  15 present and this subnode may contain children that designate regulator
  16 resources.
  17
  18 - compatible:
  19         Usage: required
  20         Value type: <string>
  21         Definition: must be one of:
  22                     "qcom,rpm-apq8084"
  23                     "qcom,rpm-msm8916"
  24                     "qcom,rpm-msm8974"
  25                     "qcom,rpm-msm8998"
  26                     "qcom,rpm-qcs404"
  27
  28 - qcom,smd-channels:
  29         Usage: required
  30         Value type: <string>
  31         Definition: must be "rpm_requests"
  32
  33 Refer to Documentation/devicetree/bindings/regulator/qcom,smd-rpm-regulator.txt
  34 for information on the regulator subnodes that can exist under the rpm_requests.
  35
  36 Example:
  37
  38         soc {
  39                 apcs: syscon@f9011000 {
  40                         compatible = "syscon";
  41                         reg = <0xf9011000 0x1000>;
  42                 };
  43         };
  44
  45         smd {
  46                 compatible = "qcom,smd";
  47
  48                 rpm {
  49                         interrupts = <0 168 1>;
  50                         qcom,ipc = <&apcs 8 0>;
  51                         qcom,smd-edge = <15>;
  52
  53                         rpm_requests {
  54                                 compatible = "qcom,rpm-msm8974";
  55                                 qcom,smd-channels = "rpm_requests";
  56
  57                                 ...
  58                         };
  59                 };
  60         };