linux-loongson/Documentation/devicetree/bindings/pci/mbvl,gpex40-pcie.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pci/mbvl,gpex40-pcie.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Mobiveil AXI PCIe Host Bridge

maintainers:
  - Frank Li <Frank Li@nxp.com>

description:
  Mobiveil's GPEX 4.0 is a PCIe Gen4 host bridge IP. This configurable IP
  has up to 8 outbound and inbound windows for address translation.

  NXP Layerscape PCIe Gen4 controller (Deprecated) base on Mobiveil's GPEX 4.0.

properties:
  compatible:
    enum:
      - fsl,lx2160a-pcie
      - mbvl,gpex40-pcie

  reg:
    items:
      - description: PCIe controller registers
      - description: Bridge config registers
      - description: GPIO registers to control slot power
      - description: MSI registers
    minItems: 2

  reg-names:
    items:
      - const: csr_axi_slave
      - const: config_axi_slave
      - const: gpio_slave
      - const: apb_csr
    minItems: 2

  apio-wins:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      number of requested APIO outbound windows
        1. Config window
        2. Memory window      
    default: 2
    maximum: 256

  ppio-wins:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: number of requested PPIO inbound windows
    default: 1
    maximum: 256

  interrupt-controller: true

  "#interrupt-cells":
    const: 1

  interrupts:
    minItems: 1
    maxItems: 3

  interrupt-names:
    minItems: 1
    maxItems: 3

  dma-coherent: true

  msi-parent: true

required:
  - compatible
  - reg
  - reg-names

allOf:
  - $ref: /schemas/pci/pci-host-bridge.yaml#
  - if:
      properties:
        compatible:
          enum:
            - fsl,lx2160a-pcie
    then:
      properties:
        reg:
          maxItems: 2

        reg-names:
          maxItems: 2

        interrupts:
          minItems: 3

        interrupt-names:
          items:
            - const: aer
            - const: pme
            - const: intr
    else:
      properties:
        dma-coherent: false
        msi-parent: false
        interrupts:
          maxItems: 1
        interrupt-names: false

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    pcie@b0000000 {
        compatible = "mbvl,gpex40-pcie";
        reg = <0xb0000000 0x00010000>,
              <0xa0000000 0x00001000>,
              <0xff000000 0x00200000>,
              <0xb0010000 0x00001000>;
        reg-names = "csr_axi_slave",
                    "config_axi_slave",
                    "gpio_slave",
                    "apb_csr";
        ranges = <0x83000000 0 0x00000000 0xa8000000 0 0x8000000>;
        #address-cells = <3>;
        #size-cells = <2>;
        device_type = "pci";
        apio-wins = <2>;
        ppio-wins = <1>;
        bus-range = <0x00 0xff>;
        interrupt-controller;
        #interrupt-cells = <1>;
        interrupt-parent = <&gic>;
        interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
        interrupt-map-mask = <0 0 0 7>;
        interrupt-map = <0 0 0 0 &pci_express 0>,
                        <0 0 0 1 &pci_express 1>,
                        <0 0 0 2 &pci_express 2>,
                        <0 0 0 3 &pci_express 3>;
    };    

  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    soc {
        #address-cells = <2>;
        #size-cells = <2>;
        pcie@3400000 {
            compatible = "fsl,lx2160a-pcie";
            reg = <0x00 0x03400000 0x0 0x00100000   /* controller registers */
                   0x80 0x00000000 0x0 0x00001000>; /* configuration space */
            reg-names = "csr_axi_slave", "config_axi_slave";
            ranges = <0x82000000 0x0 0x40000000 0x80 0x40000000 0x0 0x40000000>;
            interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* AER interrupt */
                         <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt */
                         <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
            interrupt-names = "aer", "pme", "intr";
            #address-cells = <3>;
            #size-cells = <2>;
            device_type = "pci";
            apio-wins = <8>;
            ppio-wins = <8>;
            dma-coherent;
            bus-range = <0x00 0xff>;
            msi-parent = <&its>;
            #interrupt-cells = <1>;
            interrupt-map-mask = <0 0 0 7>;
            interrupt-map = <0000 0 0 1 &gic 0 0 GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>,
                            <0000 0 0 2 &gic 0 0 GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>,
                            <0000 0 0 3 &gic 0 0 GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>,
                            <0000 0 0 4 &gic 0 0 GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>;
        };
    };