Commit ace5219f authored by Linus Walleij's avatar Linus Walleij
Browse files

PCI: ixp4xx: Add device tree bindings for IXP4xx 



This adds device tree bindings for the Intel IXP4xx
PCI controller which can be used as both host and
option.

Cc: devicetree@vger.kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Krzysztof Halasa <khalasa@piap.pl>
Cc: Zoltan HERPAI <wigyori@uid0.hu>
Cc: Raylynn Knight <rayknight@me.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent d5d9f7ac

Documentation/devicetree/bindings/pci/intel,ixp4xx-pci.yaml

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# 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 */

    };