FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/clock/renesas,cpg-mssr.yaml

     # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
     %YAML 1.2
     ---
     $id: "http://devicetree.org/schemas/clock/renesas,cpg-mssr.yaml#"
     $schema: "http://devicetree.org/meta-schemas/core.yaml#"
     
     title: Renesas Clock Pulse Generator / Module Standby and Software Reset
     
     maintainers:
      - Geert Uytterhoeven <geert+renesas@glider.be>
    
    description: |
      On Renesas ARM SoCs (SH/R-Mobile, R-Car, RZ), the CPG (Clock Pulse Generator)
      and MSSR (Module Standby and Software Reset) blocks are intimately connected,
      and share the same register block.
    
      They provide the following functionalities:
        - The CPG block generates various core clocks,
        - The MSSR block provides two functions:
            1. Module Standby, providing a Clock Domain to control the clock supply
               to individual SoC devices,
            2. Reset Control, to perform a software reset of individual SoC devices.
    
    properties:
      compatible:
        enum:
          - renesas,r7s9210-cpg-mssr  # RZ/A2
          - renesas,r8a7742-cpg-mssr  # RZ/G1H
          - renesas,r8a7743-cpg-mssr  # RZ/G1M
          - renesas,r8a7744-cpg-mssr  # RZ/G1N
          - renesas,r8a7745-cpg-mssr  # RZ/G1E
          - renesas,r8a77470-cpg-mssr # RZ/G1C
          - renesas,r8a774a1-cpg-mssr # RZ/G2M
          - renesas,r8a774b1-cpg-mssr # RZ/G2N
          - renesas,r8a774c0-cpg-mssr # RZ/G2E
          - renesas,r8a774e1-cpg-mssr # RZ/G2H
          - renesas,r8a7790-cpg-mssr  # R-Car H2
          - renesas,r8a7791-cpg-mssr  # R-Car M2-W
          - renesas,r8a7792-cpg-mssr  # R-Car V2H
          - renesas,r8a7793-cpg-mssr  # R-Car M2-N
          - renesas,r8a7794-cpg-mssr  # R-Car E2
          - renesas,r8a7795-cpg-mssr  # R-Car H3
          - renesas,r8a7796-cpg-mssr  # R-Car M3-W
          - renesas,r8a77961-cpg-mssr # R-Car M3-W+
          - renesas,r8a77965-cpg-mssr # R-Car M3-N
          - renesas,r8a77970-cpg-mssr # R-Car V3M
          - renesas,r8a77980-cpg-mssr # R-Car V3H
          - renesas,r8a77990-cpg-mssr # R-Car E3
          - renesas,r8a77995-cpg-mssr # R-Car D3
          - renesas,r8a779a0-cpg-mssr # R-Car V3U
          - renesas,r8a779f0-cpg-mssr # R-Car S4-8
          - renesas,r8a779g0-cpg-mssr # R-Car V4H
    
      reg:
        maxItems: 1
    
      clocks:
        minItems: 1
        maxItems: 2
    
      clock-names:
        minItems: 1
        maxItems: 2
        items:
          enum:
            - extal     # All
            - extalr    # Most R-Car Gen3 and RZ/G2
            - usb_extal # Most R-Car Gen2 and RZ/G1
    
      '#clock-cells':
        description: |
          - For CPG core clocks, the two clock specifier cells must be "CPG_CORE"
            and a core clock reference, as defined in
            <dt-bindings/clock/*-cpg-mssr.h>
          - For module clocks, the two clock specifier cells must be "CPG_MOD" and
            a module number, as defined in the datasheet.
        const: 2
    
      '#power-domain-cells':
        description:
          SoC devices that are part of the CPG/MSSR Clock Domain and can be
          power-managed through Module Standby should refer to the CPG device node
          in their "power-domains" property, as documented by the generic PM Domain
          bindings in Documentation/devicetree/bindings/power/power-domain.yaml.
        const: 0
    
      '#reset-cells':
        description:
          The single reset specifier cell must be the module number, as defined in
          the datasheet.
        const: 1
    
    if:
      not:
        properties:
          compatible:
            items:
              enum:
                - renesas,r7s9210-cpg-mssr
   then:
     required:
       - '#reset-cells'
   
   required:
     - compatible
     - reg
     - clocks
     - clock-names
     - '#clock-cells'
     - '#power-domain-cells'
   
   additionalProperties: false
   
   examples:
     - |
       cpg: clock-controller@e6150000 {
               compatible = "renesas,r8a7795-cpg-mssr";
               reg = <0xe6150000 0x1000>;
               clocks = <&extal_clk>, <&extalr_clk>;
               clock-names = "extal", "extalr";
               #clock-cells = <2>;
               #power-domain-cells = <0>;
               #reset-cells = <1>;
       };

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