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

   1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: "http://devicetree.org/schemas/soc/qcom/qcom,smd-rpm.yaml#"
   5 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
   6
   7 title: Qualcomm Resource Power Manager (RPM) over SMD
   8
   9 description: |
  10   This driver is used to interface with the Resource Power Manager (RPM) found
  11   in various Qualcomm platforms. The RPM allows each component in the system
  12   to vote for state of the system resources, such as clocks, regulators and bus
  13   frequencies.
  14
  15   The SMD information for the RPM edge should be filled out.  See qcom,smd.txt
  16   for the required edge properties.  All SMD related properties will reside
  17   within the RPM node itself.
  18
  19   The RPM exposes resources to its subnodes.  The rpm_requests node must be
  20   present and this subnode may contain children that designate regulator
  21   resources.
  22
  23   Refer to Documentation/devicetree/bindings/regulator/qcom,smd-rpm-regulator.yaml
  24   for information on the regulator subnodes that can exist under the
  25   rpm_requests.
  26
  27 maintainers:
  28   - Kathiravan T <kathirav@codeaurora.org>
  29
  30 properties:
  31   compatible:
  32     enum:
  33       - qcom,rpm-apq8084
  34       - qcom,rpm-ipq6018
  35       - qcom,rpm-msm8916
  36       - qcom,rpm-msm8974
  37       - qcom,rpm-msm8976
  38       - qcom,rpm-msm8996
  39       - qcom,rpm-msm8998
  40       - qcom,rpm-sdm660
  41       - qcom,rpm-sm6125
  42       - qcom,rpm-qcs404
  43
  44   qcom,smd-channels:
  45     $ref: /schemas/types.yaml#/definitions/string-array
  46     description: Channel name used for the RPM communication
  47     items:
  48       - const: rpm_requests
  49
  50 if:
  51   properties:
  52     compatible:
  53       contains:
  54         enum:
  55           - qcom,rpm-apq8084
  56           - qcom,rpm-msm8916
  57           - qcom,rpm-msm8974
  58 then:
  59   required:
  60     - qcom,smd-channels
  61
  62 required:
  63   - compatible
  64
  65 additionalProperties: false
  66
  67 examples:
  68   - |
  69     #include <dt-bindings/interrupt-controller/arm-gic.h>
  70     #include <dt-bindings/interrupt-controller/irq.h>
  71
  72     smd {
  73         compatible = "qcom,smd";
  74
  75         rpm {
  76             interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
  77             qcom,ipc = <&apcs 8 0>;
  78             qcom,smd-edge = <15>;
  79
  80                 rpm_requests {
  81                         compatible = "qcom,rpm-msm8974";
  82                         qcom,smd-channels = "rpm_requests";
  83
  84                         /* Regulator nodes to follow */
  85                 };
  86             };
  87      };
  88 ...