Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml

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

title: PCIe RC controller on Intel Gateway SoCs

maintainers:
  - Dilip Kota <eswara.kota@linux.intel.com>

select:
  properties:
    compatible:
      contains:
        const: intel,lgm-pcie
  required:
    - compatible

properties:
  compatible:
    items:
      - const: intel,lgm-pcie
      - const: snps,dw-pcie

  device_type:
    const: pci

  "#address-cells":
    const: 3

  "#size-cells":
    const: 2

  reg:
    items:
      - description: Controller control and status registers.
      - description: PCIe configuration registers.
      - description: Controller application registers.

  reg-names:
    items:
      - const: dbi
      - const: config
      - const: app

  ranges:
    maxItems: 1

  resets:
    maxItems: 1

  clocks:
    maxItems: 1

  phys:
    maxItems: 1

  phy-names:
    const: pcie

  reset-gpios:
    maxItems: 1

  linux,pci-domain: true

  num-lanes:
    maximum: 2
    description: Number of lanes to use for this port.

  '#interrupt-cells':
    const: 1

  interrupt-map-mask:
    description: Standard PCI IRQ mapping properties.

  interrupt-map:
    description: Standard PCI IRQ mapping properties.

  max-link-speed:
    description: Specify PCI Gen for link capability.
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [1, 2, 3, 4]
    default: 1

  bus-range:
    description: Range of bus numbers associated with this controller.

  reset-assert-ms:
    description: |
      Delay after asserting reset to the PCIe device.
    maximum: 500
    default: 100

required:
  - compatible
  - device_type
  - "#address-cells"
  - "#size-cells"
  - reg
  - reg-names
  - ranges
  - resets
  - clocks
  - phys
  - phy-names
  - reset-gpios
  - '#interrupt-cells'
  - interrupt-map
  - interrupt-map-mask

additionalProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>
    pcie10: pcie@d0e00000 {
      compatible = "intel,lgm-pcie", "snps,dw-pcie";
      device_type = "pci";
      #address-cells = <3>;
      #size-cells = <2>;
      reg = <0xd0e00000 0x1000>,
            <0xd2000000 0x800000>,
            <0xd0a41000 0x1000>;
      reg-names = "dbi", "config", "app";
      linux,pci-domain = <0>;
      max-link-speed = <4>;
      bus-range = <0x00 0x08>;
      #interrupt-cells = <1>;
      interrupt-map-mask = <0 0 0 0x7>;
      interrupt-map = <0 0 0 1 &ioapic1 27 1>,
                      <0 0 0 2 &ioapic1 28 1>,
                      <0 0 0 3 &ioapic1 29 1>,
                      <0 0 0 4 &ioapic1 30 1>;
      ranges = <0x02000000 0 0xd4000000 0xd4000000 0 0x04000000>;
      resets = <&rcu0 0x50 0>;
      clocks = <&cgu0 120>;
      phys = <&cb0phy0>;
      phy-names = "pcie";
      reset-assert-ms = <500>;
      reset-gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
      num-lanes = <2>;
    };