linux-stable/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pci/microchip,pcie-host.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Microchip PCIe Root Port Bridge Controller

maintainers:
  - Daire McNamara <daire.mcnamara@microchip.com>

allOf:
  - $ref: /schemas/pci/pci-bus.yaml#
  - $ref: /schemas/interrupt-controller/msi-controller.yaml#

properties:
  compatible:
    const: microchip,pcie-host-1.0 # PolarFire

  reg:
    maxItems: 2

  reg-names:
    items:
      - const: cfg
      - const: apb

  clocks:
    description:
      Fabric Interface Controllers, FICs, are the interface between the FPGA
      fabric and the core complex on PolarFire SoC. The FICs require two clocks,
      one from each side of the interface. The "FIC clocks" described by this
      property are on the core complex side & communication through a FIC is not
      possible unless it's corresponding clock is enabled. A clock must be
      enabled for each of the interfaces the root port is connected through.
      This could in theory be all 4 interfaces, one interface or any combination
      in between.
    minItems: 1
    items:
      - description: FIC0's clock
      - description: FIC1's clock
      - description: FIC2's clock
      - description: FIC3's clock

  clock-names:
    description:
      As any FIC connection combination is possible, the names should match the
      order in the clocks property and take the form "ficN" where N is a number
      0-3
    minItems: 1
    maxItems: 4
    items:
      pattern: '^fic[0-3]$'

  interrupts:
    minItems: 1
    items:
      - description: PCIe host controller
      - description: builtin MSI controller

  interrupt-names:
    minItems: 1
    items:
      - const: pcie
      - const: msi

  ranges:
    maxItems: 1

  dma-ranges:
    minItems: 1
    maxItems: 6

  msi-controller:
    description: Identifies the node as an MSI controller.

  msi-parent:
    description: MSI controller the device is capable of using.

  interrupt-controller:
    type: object
    properties:
      '#address-cells':
        const: 0

      '#interrupt-cells':
        const: 1

      interrupt-controller: true

    required:
      - '#address-cells'
      - '#interrupt-cells'
      - interrupt-controller

    additionalProperties: false

required:
  - reg
  - reg-names
  - "#interrupt-cells"
  - interrupts
  - interrupt-map-mask
  - interrupt-map
  - msi-controller

unevaluatedProperties: false

examples:
  - |
    soc {
            #address-cells = <2>;
            #size-cells = <2>;
            pcie0: pcie@2030000000 {
                    compatible = "microchip,pcie-host-1.0";
                    reg = <0x0 0x70000000 0x0 0x08000000>,
                          <0x0 0x43000000 0x0 0x00010000>;
                    reg-names = "cfg", "apb";
                    device_type = "pci";
                    #address-cells = <3>;
                    #size-cells = <2>;
                    #interrupt-cells = <1>;
                    interrupts = <119>;
                    interrupt-map-mask = <0x0 0x0 0x0 0x7>;
                    interrupt-map = <0 0 0 1 &pcie_intc0 0>,
                                    <0 0 0 2 &pcie_intc0 1>,
                                    <0 0 0 3 &pcie_intc0 2>,
                                    <0 0 0 4 &pcie_intc0 3>;
                    interrupt-parent = <&plic0>;
                    msi-parent = <&pcie0>;
                    msi-controller;
                    bus-range = <0x00 0x7f>;
                    ranges = <0x03000000 0x0 0x78000000 0x0 0x78000000 0x0 0x04000000>;
                    pcie_intc0: interrupt-controller {
                        #address-cells = <0>;
                        #interrupt-cells = <1>;
                        interrupt-controller;
                    };
            };
    };