linux-zen-desktop/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.yaml

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

title: Broadcom iProc PCIe controller with the platform bus interface

maintainers:
  - Ray Jui <ray.jui@broadcom.com>
  - Scott Branden <scott.branden@broadcom.com>

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

properties:
  compatible:
    items:
      - enum:
          # for the first generation of PAXB based controller, used in SoCs
          # including NSP, Cygnus, NS2, and Pegasus
          - brcm,iproc-pcie
          # for the second generation of PAXB-based controllers, used in
          # Stingray
          - brcm,iproc-pcie-paxb-v2
          # For the first generation of PAXC based controller, used in NS2
          - brcm,iproc-pcie-paxc
          # For the second generation of PAXC based controller, used in Stingray
          - brcm,iproc-pcie-paxc-v2

  reg:
    maxItems: 1
    description: >
       Base address and length of the PCIe controller I/O register space

  interrupt-map: true

  interrupt-map-mask: true

  "#interrupt-cells":
    const: 1

  ranges:
    minItems: 1
    maxItems: 2
    description: >
      Ranges for the PCI memory and I/O regions

  phys:
    maxItems: 1

  phy-names:
    items:
      - const: pcie-phy

  bus-range: true

  dma-coherent: true

  "#address-cells": true

  "#size-cells": true

  device_type: true

  brcm,pcie-ob:
    type: boolean
    description: >
      Some iProc SoCs do not have the outbound address mapping done by the
      ASIC after power on reset. In this case, SW needs to configure it

  brcm,pcie-ob-axi-offset:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: >
       The offset from the AXI address to the internal address used by the
       iProc PCIe core (not the PCIe address)

  msi:
    type: object
    properties:
      compatible:
        items:
          - const: brcm,iproc-msi

  msi-parent: true

  msi-controller: true

  brcm,pcie-msi-inten:
    type: boolean
    description: >
      Needs to be present for some older iProc platforms that require the
      interrupt enable registers to be set explicitly to enable MSI

dependencies:
  brcm,pcie-ob-axi-offset: ["brcm,pcie-ob"]
  brcm,pcie-msi-inten: [msi-controller]

required:
  - compatible
  - reg
  - ranges

if:
  properties:
    compatible:
      contains:
        enum:
          - brcm,iproc-pcie
then:
  required:
    - interrupt-map
    - interrupt-map-mask

unevaluatedProperties: false

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

   bus {
      #address-cells = <1>;
      #size-cells = <1>;
           pcie0: pcie@18012000 {
              compatible = "brcm,iproc-pcie";
              reg = <0x18012000 0x1000>;

              #interrupt-cells = <1>;
              interrupt-map-mask = <0 0 0 0>;
              interrupt-map = <0 0 0 0 &gic GIC_SPI 100 IRQ_TYPE_NONE>;

              linux,pci-domain = <0>;

              bus-range = <0x00 0xff>;

              #address-cells = <3>;
              #size-cells = <2>;
              device_type = "pci";
              ranges = <0x81000000 0 0     0x28000000 0 0x00010000>,
                   <0x82000000 0 0x20000000 0x20000000 0 0x04000000>;

              phys = <&phy 0 5>;
              phy-names = "pcie-phy";

              brcm,pcie-ob;
              brcm,pcie-ob-axi-offset = <0x00000000>;

              msi-parent = <&msi0>;

              /* iProc event queue based MSI */
              msi0: msi {
                 compatible = "brcm,iproc-msi";
                 msi-controller;
                 interrupt-parent = <&gic>;
                 interrupts = <GIC_SPI 96 IRQ_TYPE_NONE>,
                         <GIC_SPI 97 IRQ_TYPE_NONE>,
                         <GIC_SPI 98 IRQ_TYPE_NONE>,
                         <GIC_SPI 99 IRQ_TYPE_NONE>;
              };
           };

           pcie1: pcie@18013000 {
              compatible = "brcm,iproc-pcie";
              reg = <0x18013000 0x1000>;

              #interrupt-cells = <1>;
              interrupt-map-mask = <0 0 0 0>;
              interrupt-map = <0 0 0 0 &gic GIC_SPI 106 IRQ_TYPE_NONE>;

              linux,pci-domain = <1>;

              bus-range = <0x00 0xff>;

              #address-cells = <3>;
              #size-cells = <2>;
              device_type = "pci";
              ranges = <0x81000000 0 0     0x48000000 0 0x00010000>,
                   <0x82000000 0 0x40000000 0x40000000 0 0x04000000>;

              phys = <&phy 1 6>;
              phy-names = "pcie-phy";
           };
    };