dt-bindings: PCI: Add bindings for brcmstb's PCIe device

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/pci/brcm,stb-pcie.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Brcmstb PCIe Host Controller Device Tree Bindings

maintainers:

  - Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

allOf:

  - $ref: /schemas/pci/pci-bus.yaml#

properties:

  compatible:

    const: brcm,bcm2711-pcie # The Raspberry Pi 4

  reg:

    maxItems: 1

  interrupts:

    minItems: 1

    maxItems: 2

    items:

      - description: PCIe host controller

      - description: builtin MSI controller

  interrupt-names:

    minItems: 1

    maxItems: 2

    items:

      - const: pcie

      - const: msi

  ranges:

    maxItems: 1

  dma-ranges:

    maxItems: 1

  clocks:

    maxItems: 1

  clock-names:

    items:

      - const: sw_pcie

  msi-controller:

    description: Identifies the node as an MSI controller.

  msi-parent:

    description: MSI controller the device is capable of using.

  brcm,enable-ssc:

    description: Indicates usage of spread-spectrum clocking.

    type: boolean

required:

  - reg

  - dma-ranges

  - "#interrupt-cells"

  - interrupts

  - interrupt-names

  - interrupt-map-mask

  - interrupt-map

  - msi-controller

unevaluatedProperties: false

examples:

  - |

    #include <dt-bindings/interrupt-controller/irq.h>

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

    scb {

            #address-cells = <2>;

            #size-cells = <1>;

            pcie0: pcie@7d500000 {

                    compatible = "brcm,bcm2711-pcie";

                    reg = <0x0 0x7d500000 0x9310>;

                    device_type = "pci";

                    #address-cells = <3>;

                    #size-cells = <2>;

                    #interrupt-cells = <1>;

                    interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>,

                                 <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;

                    interrupt-names = "pcie", "msi";

                    interrupt-map-mask = <0x0 0x0 0x0 0x7>;

                    interrupt-map = <0 0 0 1 &gicv2 GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;

                    msi-parent = <&pcie0>;

                    msi-controller;

                    ranges = <0x02000000 0x0 0xf8000000 0x6 0x00000000 0x0 0x04000000>;

                    dma-ranges = <0x02000000 0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>;

                    brcm,enable-ssc;

            };

    };