# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/loongson,ls2k0300-dma.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Loongson-2 Multi-Channel DMA controller

description:
  The Loongson-2 Multi-Channel DMA controller is used for transferring data
  between system memory and the peripherals on the APB bus.

maintainers:
  - Binbin Zhou <zhoubinbin@loongson.cn>

allOf:
  - $ref: dma-controller.yaml#

properties:
  compatible:
    enum:
      - loongson,ls2k0300-dma
      - loongson,ls2k3000-dma

  reg:
    maxItems: 1

  interrupts:
    description:
      Should contain all of the per-channel DMA interrupts in ascending order
      with respect to the DMA channel index.
    minItems: 4
    maxItems: 8

  clocks:
    maxItems: 1
 
  '#dma-cells':
    const: 2
    description: |
      DMA request from clients consists of 2 cells:
        1. Channel index
        2. Transfer request factor number, If no transfer factor, use 0.
           The number is SoC-specific, and this should be specified with
           relation to the device to use the DMA controller.

  dma-channels:
    enum: [4, 8]

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - '#dma-cells'
  - dma-channels

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/irq.h>
    #include <dt-bindings/clock/loongson,ls2k-clk.h>
 
    dma-controller@1612c000 {
        compatible = "loongson,ls2k0300-dma";
        reg = <0x1612c000 0xff>;
        interrupt-parent = <&liointc0>;
        interrupts = <23 IRQ_TYPE_LEVEL_HIGH>,
                     <24 IRQ_TYPE_LEVEL_HIGH>,
                     <25 IRQ_TYPE_LEVEL_HIGH>,
                     <26 IRQ_TYPE_LEVEL_HIGH>,
                     <27 IRQ_TYPE_LEVEL_HIGH>,
                     <28 IRQ_TYPE_LEVEL_HIGH>,
                     <29 IRQ_TYPE_LEVEL_HIGH>,
                     <30 IRQ_TYPE_LEVEL_HIGH>;
        clocks = <&clk LS2K0300_CLK_APB_GATE>;
        #dma-cells = <2>;
        dma-channels = <8>;
    };
...