xref: /freebsd/sys/contrib/device-tree/Bindings/dma/sprd,sc9860-dma.yaml (revision 0e8011faf58b743cc652e3b2ad0f7671227610df)

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/sprd,sc9860-dma.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Spreadtrum SC9860 DMA controller

description: |
  There are three DMA controllers: AP DMA, AON DMA and AGCP DMA. For AGCP
  DMA controller, it can or do not request the IRQ, which will save
  system power without resuming system by DMA interrupts if AGCP DMA
  does not request the IRQ.

maintainers:
  - Orson Zhai <orsonzhai@gmail.com>
  - Baolin Wang <baolin.wang7@gmail.com>
  - Chunyan Zhang <zhang.lyra@gmail.com>

properties:
  compatible:
    const: sprd,sc9860-dma

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    minItems: 1
    items:
      - description: DMA enable clock
      - description: optional ashb_eb clock, only for the AGCP DMA controller

  clock-names:
    minItems: 1
    items:
      - const: enable
      - const: ashb_eb

  '#dma-cells':
    const: 1

  dma-channels:
    const: 32

  '#dma-channels':
    const: 32
    deprecated: true

required:
  - compatible
  - reg
  - clocks
  - clock-names
  - '#dma-cells'
  - dma-channels

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

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/clock/sprd,sc9860-clk.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/interrupt-controller/irq.h>

    /* AP DMA controller */
    dma-controller@20100000 {
      compatible = "sprd,sc9860-dma";
      reg = <0x20100000 0x4000>;
      interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
      clocks = <&apahb_gate CLK_DMA_EB>;
      clock-names = "enable";
      #dma-cells = <1>;
      dma-channels = <32>;
    };

    /* AGCP DMA controller */
    dma-controller@41580000 {
      compatible = "sprd,sc9860-dma";
      reg = <0x41580000 0x4000>;
      clocks = <&agcp_gate CLK_AGCP_DMAAP_EB>,
               <&agcp_gate CLK_AGCP_AP_ASHB_EB>;
      clock-names = "enable", "ashb_eb";
      #dma-cells = <1>;
      dma-channels = <32>;
    };
...