Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/dma/fsl,eloplus-dma.yaml
26308 views
1
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

2
%YAML 1.2

3
---

4
$id: http://devicetree.org/schemas/dma/fsl,eloplus-dma.yaml#

5
$schema: http://devicetree.org/meta-schemas/core.yaml#

6


7
title: Freescale EloPlus DMA Controller

8


9
maintainers:

10
  - J. Neuschäfer <j.ne@posteo.net>

11


12
description:

13
  This is a 4-channel DMA controller with extended addresses and chaining,

14
  mainly used in Freescale mpc85xx/86xx, Pxxx and BSC series chips, such as

15
  mpc8540, mpc8641 p4080, bsc9131 etc.

16


17
properties:

18
  compatible:

19
    oneOf:

20
      - items:

21
          - enum:

22
              - fsl,mpc8540-dma

23
              - fsl,mpc8541-dma

24
              - fsl,mpc8548-dma

25
              - fsl,mpc8555-dma

26
              - fsl,mpc8560-dma

27
              - fsl,mpc8572-dma

28
              - fsl,mpc8641-dma

29
          - const: fsl,eloplus-dma

30
      - const: fsl,eloplus-dma

31


32
  reg:

33
    items:

34
      - description:

35
          DMA General Status Register, i.e. DGSR which contains

36
          status for all the 4 DMA channels

37


38
  cell-index:

39
    $ref: /schemas/types.yaml#/definitions/uint32

40
    description:

41
      controller index.  0 for controller @ 0x21000, 1 for controller @ 0xc000

42


43
  ranges: true

44


45
  "#address-cells":

46
    const: 1

47


48
  "#size-cells":

49
    const: 1

50


51
  interrupts:

52
    maxItems: 1

53
    description: Controller interrupt.

54


55
patternProperties:

56
  "^dma-channel@[0-9a-f]+$":

57
    type: object

58
    additionalProperties: false

59


60
    properties:

61
      compatible:

62
        oneOf:

63
          # native DMA channel

64
          - items:

65
              - enum:

66
                  - fsl,mpc8540-dma-channel

67
                  - fsl,mpc8541-dma-channel

68
                  - fsl,mpc8548-dma-channel

69
                  - fsl,mpc8555-dma-channel

70
                  - fsl,mpc8560-dma-channel

71
                  - fsl,mpc8572-dma-channel

72
              - const: fsl,eloplus-dma-channel

73


74
          # audio DMA channel, see fsl,ssi.yaml

75
          - const: fsl,ssi-dma-channel

76


77
      reg:

78
        maxItems: 1

79


80
      cell-index:

81
        description: DMA channel index starts at 0.

82


83
      interrupts:

84
        maxItems: 1

85
        description:

86
          Per-channel interrupt. Only necessary if no controller interrupt has

87
          been provided.

88


89
additionalProperties: false

90


91
examples:

92
  - |

93
    #include <dt-bindings/interrupt-controller/irq.h>

94


95
    dma@21300 {

96
        compatible = "fsl,mpc8540-dma", "fsl,eloplus-dma";

97
        reg = <0x21300 4>;

98
        #address-cells = <1>;

99
        #size-cells = <1>;

100
        ranges = <0 0x21100 0x200>;

101
        cell-index = <0>;

102


103
        dma-channel@0 {

104
            compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";

105
            reg = <0 0x80>;

106
            cell-index = <0>;

107
            interrupts = <20 IRQ_TYPE_EDGE_FALLING>;

108
        };

109


110
        dma-channel@80 {

111
            compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";

112
            reg = <0x80 0x80>;

113
            cell-index = <1>;

114
            interrupts = <21 IRQ_TYPE_EDGE_FALLING>;

115
        };

116


117
        dma-channel@100 {

118
            compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";

119
            reg = <0x100 0x80>;

120
            cell-index = <2>;

121
            interrupts = <22 IRQ_TYPE_EDGE_FALLING>;

122
        };

123


124
        dma-channel@180 {

125
            compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";

126
            reg = <0x180 0x80>;

127
            cell-index = <3>;

128
            interrupts = <23 IRQ_TYPE_EDGE_FALLING>;

129
        };

130
    };

131


132
...

133


134