Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.yaml

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

title: Renesas VMSA-Compatible IOMMU

maintainers:
  - Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

description:
  The IPMMU is an IOMMU implementation compatible with the ARM VMSA page tables.
  It provides address translation for bus masters outside of the CPU, each
  connected to the IPMMU through a port called micro-TLB.

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - renesas,ipmmu-r8a73a4  # R-Mobile APE6
              - renesas,ipmmu-r8a7742  # RZ/G1H
              - renesas,ipmmu-r8a7743  # RZ/G1M
              - renesas,ipmmu-r8a7744  # RZ/G1N
              - renesas,ipmmu-r8a7745  # RZ/G1E
              - renesas,ipmmu-r8a7790  # R-Car H2
              - renesas,ipmmu-r8a7791  # R-Car M2-W
              - renesas,ipmmu-r8a7793  # R-Car M2-N
              - renesas,ipmmu-r8a7794  # R-Car E2
          - const: renesas,ipmmu-vmsa  # R-Mobile APE6 or R-Car Gen2 or RZ/G1

      - items:
          - enum:
              - renesas,ipmmu-r8a774a1 # RZ/G2M
              - renesas,ipmmu-r8a774b1 # RZ/G2N
              - renesas,ipmmu-r8a774c0 # RZ/G2E
              - renesas,ipmmu-r8a774e1 # RZ/G2H
              - renesas,ipmmu-r8a7795  # R-Car H3
              - renesas,ipmmu-r8a7796  # R-Car M3-W
              - renesas,ipmmu-r8a77961 # R-Car M3-W+
              - renesas,ipmmu-r8a77965 # R-Car M3-N
              - renesas,ipmmu-r8a77970 # R-Car V3M
              - renesas,ipmmu-r8a77980 # R-Car V3H
              - renesas,ipmmu-r8a77990 # R-Car E3
              - renesas,ipmmu-r8a77995 # R-Car D3

      - items:
          - enum:
              - renesas,ipmmu-r8a779a0           # R-Car V3U
              - renesas,ipmmu-r8a779f0           # R-Car S4-8
              - renesas,ipmmu-r8a779g0           # R-Car V4H
          - const: renesas,rcar-gen4-ipmmu-vmsa  # R-Car Gen4

  reg:
    maxItems: 1

  interrupts:
    minItems: 1
    description:
      Specifiers for the MMU fault interrupts. Not required for cache IPMMUs.
    items:
      - description: non-secure mode
      - description: secure mode if supported

  '#iommu-cells':
    const: 1
    description:
      The number of the micro-TLB that the device is connected to.

  power-domains:
    maxItems: 1

  renesas,ipmmu-main:
    $ref: /schemas/types.yaml#/definitions/phandle-array
    items:
      - minItems: 1
        items:
          - description: phandle to main IPMMU
          - description:
              The interrupt bit number associated with the particular cache
              IPMMU device. If present, the interrupt bit number needs to match
              the main IPMMU IMSSTR register. Only used by cache IPMMU
              instances.
    description:
      Reference to the main IPMMU.

required:
  - compatible
  - reg
  - '#iommu-cells'

oneOf:
  - required:
      - interrupts
  - required:
      - renesas,ipmmu-main

additionalProperties: false

allOf:
  - if:
      properties:
        compatible:
          not:
            contains:
              const: renesas,ipmmu-vmsa
    then:
      required:
        - power-domains

  - if:
      properties:
        compatible:
          contains:
            const: renesas,rcar-gen4-ipmmu-vmsa
    then:
      properties:
        renesas,ipmmu-main:
          items:
            - maxItems: 1
    else:
      properties:
        renesas,ipmmu-main:
          items:
            - minItems: 2

examples:
  - |
    #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/power/r8a7791-sysc.h>

    ipmmu_mx: iommu@fe951000 {
        compatible = "renesas,ipmmu-r8a7791", "renesas,ipmmu-vmsa";
        reg = <0xfe951000 0x1000>;
        interrupts = <GIC_SPI 222 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 221 IRQ_TYPE_LEVEL_HIGH>;
        #iommu-cells = <1>;
    };