xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/pci/intel,ixp4xx-pci.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pci/intel,ixp4xx-pci.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Intel IXP4xx PCI controller

maintainers:
  - Linus Walleij <linus.walleij@linaro.org>

description: PCI host controller found in the Intel IXP4xx SoC series.

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

properties:
  compatible:
    items:
      - enum:
          - intel,ixp42x-pci
          - intel,ixp43x-pci
    description: The two supported variants are ixp42x and ixp43x,
      though more variants may exist.

  reg:
    items:
      - description: IXP4xx-specific registers

  interrupts:
    items:
      - description: Main PCI interrupt
      - description: PCI DMA interrupt 1
      - description: PCI DMA interrupt 2

  ranges:
    maxItems: 2
    description: Typically one memory range of 64MB and one IO
      space range of 64KB.

  dma-ranges:
    maxItems: 1
    description: The DMA range tells the PCI host which addresses
      the RAM is at. It can map only 64MB so if the RAM is bigger
      than 64MB the DMA access has to be restricted to these
      addresses.

  "#interrupt-cells": true

  interrupt-map: true

  interrupt-map-mask:
    items:
      - const: 0xf800
      - const: 0
      - const: 0
      - const: 7

required:
  - compatible
  - reg
  - dma-ranges
  - "#interrupt-cells"
  - interrupt-map
  - interrupt-map-mask

unevaluatedProperties: false

examples:
  - |
    pci@c0000000 {
      compatible = "intel,ixp43x-pci";
      reg = <0xc0000000 0x1000>;
      #address-cells = <3>;
      #size-cells = <2>;
      device_type = "pci";
      bus-range = <0x00 0xff>;

      ranges =
        <0x02000000 0 0x48000000 0x48000000 0 0x04000000>,
        <0x01000000 0 0x00000000 0x4c000000 0 0x00010000>;
      dma-ranges =
        <0x02000000 0 0x00000000 0x00000000 0 0x04000000>;

      #interrupt-cells = <1>;
      interrupt-map-mask = <0xf800 0 0 7>;
      interrupt-map =
        <0x0800 0 0 1 &gpio0 11 3>, /* INT A on slot 1 is irq 11 */
        <0x0800 0 0 2 &gpio0 10 3>, /* INT B on slot 1 is irq 10 */
        <0x0800 0 0 3 &gpio0 9  3>, /* INT C on slot 1 is irq 9 */
        <0x0800 0 0 4 &gpio0 8  3>, /* INT D on slot 1 is irq 8 */
        <0x1000 0 0 1 &gpio0 10 3>, /* INT A on slot 2 is irq 10 */
        <0x1000 0 0 2 &gpio0 9  3>, /* INT B on slot 2 is irq 9 */
        <0x1000 0 0 3 &gpio0 8  3>, /* INT C on slot 2 is irq 8 */
        <0x1000 0 0 4 &gpio0 11 3>, /* INT D on slot 2 is irq 11 */
        <0x1800 0 0 1 &gpio0 9  3>, /* INT A on slot 3 is irq 9 */
        <0x1800 0 0 2 &gpio0 8  3>, /* INT B on slot 3 is irq 8 */
        <0x1800 0 0 3 &gpio0 11 3>, /* INT C on slot 3 is irq 11 */
        <0x1800 0 0 4 &gpio0 10 3>; /* INT D on slot 3 is irq 10 */
    };