xref: /freebsd-src/sys/contrib/device-tree/Bindings/virtio/mmio.yaml (revision b97ee269eae3cbaf35c18f51a459aea581c2a7dc)

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

title: virtio memory mapped devices

maintainers:
  - Jean-Philippe Brucker <jean-philippe@linaro.org>

description:
  See https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=virtio for
  more details.

properties:
  compatible:
    const: virtio,mmio

  reg:
    maxItems: 1

  dma-coherent: true

  interrupts:
    maxItems: 1

  '#iommu-cells':
    description: Required when the node corresponds to a virtio-iommu device.
    const: 1

  iommus:
    description: Required for devices making accesses thru an IOMMU.
    maxItems: 1

  wakeup-source:
    type: boolean
    description: Required for setting irq of a virtio_mmio device as wakeup source.

required:
  - compatible
  - reg
  - interrupts

additionalProperties:
  type: object

examples:
  - |
    virtio@3000 {
        compatible = "virtio,mmio";
        reg = <0x3000 0x100>;
        interrupts = <41>;

        /* Device has endpoint ID 23 */
        iommus = <&viommu 23>;
    };

    viommu: iommu@3100 {
        compatible = "virtio,mmio";
        reg = <0x3100 0x100>;
        interrupts = <42>;

        #iommu-cells = <1>;
    };

...