Documentation / devicetree / bindings / sound / davinci-mcasp-audio.yaml


Based on kernel version 6.11. Page generated on 2024-09-24 08:21 EST.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/davinci-mcasp-audio.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: McASP Controller for TI SoCs

maintainers:
  - Jayesh Choudhary <j-choudhary@ti.com>

properties:
  compatible:
    enum:
      - ti,dm646x-mcasp-audio
      - ti,da830-mcasp-audio
      - ti,am33xx-mcasp-audio
      - ti,dra7-mcasp-audio
      - ti,omap4-mcasp-audio

  reg:
    minItems: 1
    items:
      - description: CFG registers
      - description: data registers

  reg-names:
    minItems: 1
    items:
      - const: mpu
      - const: dat

  op-mode:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: 0 - I2S or 1 - DIT operation mode
    enum:
      - 0
      - 1

  tdm-slots:
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      number of channels over one serializer
      the property is ignored in DIT mode
    minimum: 2
    maximum: 32

  serial-dir:
    description:
      A list of serializer configuration
      Entry is indication for serializer pin direction
      0 - Inactive, 1 - TX, 2 - RX
      All AXR pins should be present in the array even if inactive
    $ref: /schemas/types.yaml#/definitions/uint32-array
    minItems: 1
    maxItems: 25
    items:
      minimum: 0
      maximum: 2

  dmas:
    minItems: 1
    items:
      - description: transmission DMA channel
      - description: reception DMA channel

  dma-names:
    minItems: 1
    items:
      - const: tx
      - const: rx

  ti,hwmods:
    $ref: /schemas/types.yaml#/definitions/string
    description: Name of hwmod associated with McASP
    maxItems: 1
    deprecated: true

  tx-num-evt:
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      configures WFIFO threshold
      0 disables the FIFO use
      if property is missing, then also FIFO use is disabled

  rx-num-evt:
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      configures RFIFO threshold
      0 disables the FIFO use
      if property is missing, then also FIFO use is disabled

  dismod:
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      specify the drive on TX pin during inactive time slots
      0 - 3-state, 2 - logic low, 3 - logic high
    enum:
      - 0
      - 2
      - 3
    default: 2

  interrupts:
    anyOf:
      - minItems: 1
        items:
          - description: TX interrupt
          - description: RX interrupt
      - items:
          - description: common/combined interrupt

  interrupt-names:
    oneOf:
      - minItems: 1
        items:
          - const: tx
          - const: rx
      - const: common

  fck_parent:
    $ref: /schemas/types.yaml#/definitions/string
    description: parent clock name for McASP fck
    maxItems: 1

  auxclk-fs-ratio:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: ratio of AUCLK and FS rate if applicable

  gpio-controller: true
 
  "#gpio-cells":
    const: 2

  clocks:
    minItems: 1
    items:
      - description: functional clock
      - description: module specific optional ahclkx clock
      - description: module specific optional ahclkr clock

  clock-names:
    minItems: 1
    items:
      - const: fck
      - const: ahclkx
      - const: ahclkr

  power-domains:
    description: phandle to the corresponding power-domain
    maxItems: 1
 
  "#sound-dai-cells":
    const: 0

  port:
    description: connection for when McASP is used via graph card
    type: object

required:
  - compatible
  - reg
  - reg-names
  - dmas
  - dma-names
  - interrupts
  - interrupt-names

allOf:
  - $ref: dai-common.yaml#
  - if:
      properties:
        opmode:
          enum:
            - 0

    then:
      required:
        - tdm-slots

unevaluatedProperties: false

examples:
  - |
    mcasp0: mcasp0@1d00000 {
      compatible = "ti,da830-mcasp-audio";
      reg = <0x100000 0x3000>;
      reg-names = "mpu";
      interrupts = <82>, <83>;
      interrupt-names = "tx", "rx";
      op-mode = <0>;		/* MCASP_IIS_MODE */
      tdm-slots = <2>;
      dmas = <&main_udmap 0xc400>, <&main_udmap 0x4400>;
      dma-names = "tx", "rx";
      serial-dir = <
          0 0 0 0	/* 0: INACTIVE, 1: TX, 2: RX */
          0 0 0 0
          0 0 0 1
          2 0 0 0 >;
      tx-num-evt = <1>;
      rx-num-evt = <1>;
    };