Documentation/devicetree/bindings/dma/allwinner,sun50i-a64-dma.yaml

   1 # SPDX-License-Identifier: GPL-2.0
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/dma/allwinner,sun50i-a64-dma.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Allwinner A64 DMA Controller Device Tree Bindings
   8
   9 maintainers:
  10   - Chen-Yu Tsai <wens@csie.org>
  11   - Maxime Ripard <mripard@kernel.org>
  12
  13 allOf:
  14   - $ref: "dma-controller.yaml#"
  15
  16 properties:
  17   "#dma-cells":
  18     const: 1
  19     description: The cell is the request line number.
  20
  21   compatible:
  22     oneOf:
  23       - enum:
  24           - allwinner,sun20i-d1-dma
  25           - allwinner,sun50i-a64-dma
  26           - allwinner,sun50i-a100-dma
  27           - allwinner,sun50i-h6-dma
  28       - items:
  29           - const: allwinner,sun8i-r40-dma
  30           - const: allwinner,sun50i-a64-dma
  31
  32   reg:
  33     maxItems: 1
  34
  35   interrupts:
  36     maxItems: 1
  37
  38   clocks:
  39     minItems: 1
  40     maxItems: 2
  41
  42   clock-names:
  43     items:
  44       - const: bus
  45       - const: mbus
  46
  47   resets:
  48     maxItems: 1
  49
  50 required:
  51   - "#dma-cells"
  52   - compatible
  53   - reg
  54   - interrupts
  55   - clocks
  56   - resets
  57   - dma-channels
  58
  59 if:
  60   properties:
  61     compatible:
  62       enum:
  63         - allwinner,sun20i-d1-dma
  64         - allwinner,sun50i-a100-dma
  65         - allwinner,sun50i-h6-dma
  66
  67 then:
  68   properties:
  69     clocks:
  70       minItems: 2
  71
  72   required:
  73     - clock-names
  74
  75 else:
  76   properties:
  77     clocks:
  78       maxItems: 1
  79
  80 unevaluatedProperties: false
  81
  82 examples:
  83   - |
  84     dma: dma-controller@1c02000 {
  85         compatible = "allwinner,sun50i-a64-dma";
  86         reg = <0x01c02000 0x1000>;
  87         interrupts = <0 50 4>;
  88         clocks = <&ccu 30>;
  89         dma-channels = <8>;
  90         dma-requests = <27>;
  91         resets = <&ccu 7>;
  92         #dma-cells = <1>;
  93     };
  94
  95 ...