FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/bus/simple-pm-bus.yaml

     # SPDX-License-Identifier: GPL-2.0
     %YAML 1.2
     ---
     $id: http://devicetree.org/schemas/bus/simple-pm-bus.yaml#
     $schema: http://devicetree.org/meta-schemas/core.yaml#
     
     title: Simple Power-Managed Bus
     
     maintainers:
      - Geert Uytterhoeven <geert+renesas@glider.be>
    
    description: |
      A Simple Power-Managed Bus is a transparent bus that doesn't need a real
      driver, as it's typically initialized by the boot loader.
    
      However, its bus controller is part of a PM domain, or under the control
      of a functional clock.  Hence, the bus controller's PM domain and/or
      clock must be enabled for child devices connected to the bus (either
      on-SoC or externally) to function.
    
      While "simple-pm-bus" follows the "simple-bus" set of properties, as
      specified in the Devicetree Specification, it is not an extension of
      "simple-bus".
    
    properties:
      $nodename:
        pattern: "^bus(@[0-9a-f]+)?$"
    
      compatible:
        contains:
          const: simple-pm-bus
        description:
          Shall contain "simple-pm-bus" in addition to a optional bus-specific
          compatible strings defined in individual pm-bus bindings.
    
      '#address-cells':
        enum: [ 1, 2 ]
    
      '#size-cells':
        enum: [ 1, 2 ]
    
      ranges: true
    
      clocks: true
        # Functional clocks
        # Required if power-domains is absent, optional otherwise
    
      power-domains:
        # Required if clocks is absent, optional otherwise
        minItems: 1
    
    required:
      - compatible
      - '#address-cells'
      - '#size-cells'
      - ranges
    
    anyOf:
      - required:
          - clocks
      - required:
          - power-domains
    
    additionalProperties: true
    
    examples:
      - |
        #include <dt-bindings/clock/qcom,gcc-msm8996.h>
        #include <dt-bindings/interrupt-controller/irq.h>
    
        bus {
            power-domains = <&gcc AGGRE0_NOC_GDSC>;
            compatible = "simple-pm-bus";
            #address-cells = <1>;
            #size-cells = <1>;
            ranges;
        };

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