xref: /openbmc/linux/Documentation/devicetree/bindings/dma/arm-pl08x.yaml (revision 10cafa2d)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/arm-pl08x.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: ARM PrimeCells PL080 and PL081 and derivatives DMA controller

maintainers:
  - Vinod Koul <vkoul@kernel.org>

allOf:
  - $ref: /schemas/arm/primecell.yaml#
  - $ref: dma-controller.yaml#

# We need a select here so we don't match all nodes with 'arm,primecell'
select:
  properties:
    compatible:
      contains:
        enum:
          - arm,pl080
          - arm,pl081
  required:
    - compatible

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - arm,pl080
              - arm,pl081
          - const: arm,primecell
      - items:
          - const: faraday,ftdma020
          - const: arm,pl080
          - const: arm,primecell

  reg:
    maxItems: 1
    description: Address range of the PL08x registers

  interrupts:
    minItems: 1
    description: The PL08x interrupt number

  clocks:
    minItems: 1
    description: The clock running the IP core clock

  clock-names:
    maxItems: 1

  lli-bus-interface-ahb1:
    type: boolean
    description: if AHB master 1 is eligible for fetching LLIs

  lli-bus-interface-ahb2:
    type: boolean
    description: if AHB master 2 is eligible for fetching LLIs

  mem-bus-interface-ahb1:
    type: boolean
    description: if AHB master 1 is eligible for fetching memory contents

  mem-bus-interface-ahb2:
    type: boolean
    description: if AHB master 2 is eligible for fetching memory contents

  memcpy-burst-size:
    $ref: /schemas/types.yaml#/definitions/uint32
    enum:
      - 1
      - 4
      - 8
      - 16
      - 32
      - 64
      - 128
      - 256
    description: the size of the bursts for memcpy

  memcpy-bus-width:
    $ref: /schemas/types.yaml#/definitions/uint32
    enum:
      - 8
      - 16
      - 32
      - 64
    description: bus width used for memcpy in bits. FTDMAC020 also accept 64 bits

  resets:
    maxItems: 1

required:
  - reg
  - interrupts
  - clocks
  - clock-names
  - "#dma-cells"

unevaluatedProperties: false

examples:
  - |
    dmac0: dma-controller@10130000 {
      compatible = "arm,pl080", "arm,primecell";
      reg = <0x10130000 0x1000>;
      interrupt-parent = <&vica>;
      interrupts = <15>;
      clocks = <&hclkdma0>;
      clock-names = "apb_pclk";
      lli-bus-interface-ahb1;
      lli-bus-interface-ahb2;
      mem-bus-interface-ahb2;
      memcpy-burst-size = <256>;
      memcpy-bus-width = <32>;
      #dma-cells = <2>;
    };
  - |
    #include <dt-bindings/interrupt-controller/irq.h>
    #include <dt-bindings/reset/cortina,gemini-reset.h>
    #include <dt-bindings/clock/cortina,gemini-clock.h>
    dma-controller@67000000 {
      compatible = "faraday,ftdma020", "arm,pl080", "arm,primecell";
      /* Faraday Technology FTDMAC020 variant */
      arm,primecell-periphid = <0x0003b080>;
      reg = <0x67000000 0x1000>;
      interrupts = <9 IRQ_TYPE_EDGE_RISING>;
      resets = <&syscon GEMINI_RESET_DMAC>;
      clocks = <&syscon GEMINI_CLK_AHB>;
      clock-names = "apb_pclk";
      /* Bus interface AHB1 (AHB0) is totally tilted */
      lli-bus-interface-ahb2;
      mem-bus-interface-ahb2;
      memcpy-burst-size = <256>;
      memcpy-bus-width = <32>;
      #dma-cells = <2>;
    };