davinci-mcasp-audio.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/sound/davinci-mcasp-audio.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: McASP Controller for TI SoCs
    8 
    9 maintainers:
   10   - Jayesh Choudhary <j-choudhary@ti.com>
   11 
   12 properties:
   13   compatible:
   14     enum:
   15       - ti,dm646x-mcasp-audio
   16       - ti,da830-mcasp-audio
   17       - ti,am33xx-mcasp-audio
   18       - ti,dra7-mcasp-audio
   19       - ti,omap4-mcasp-audio
   20 
   21   reg:
   22     minItems: 1
   23     items:
   24       - description: CFG registers
   25       - description: data registers
   26 
   27   reg-names:
   28     minItems: 1
   29     items:
   30       - const: mpu
   31       - const: dat
   32 
   33   op-mode:
   34     $ref: /schemas/types.yaml#/definitions/uint32
   35     description: 0 - I2S or 1 - DIT operation mode
   36     enum:
   37       - 0
   38       - 1
   39 
   40   tdm-slots:
   41     $ref: /schemas/types.yaml#/definitions/uint32
   42     description:
   43       number of channels over one serializer
   44       the property is ignored in DIT mode
   45     minimum: 2
   46     maximum: 32
   47 
   48   serial-dir:
   49     description:
   50       A list of serializer configuration
   51       Entry is indication for serializer pin direction
   52       0 - Inactive, 1 - TX, 2 - RX
   53       All AXR pins should be present in the array even if inactive
   54     $ref: /schemas/types.yaml#/definitions/uint32-array
   55     minItems: 1
   56     maxItems: 25
   57     items:
   58       minimum: 0
   59       maximum: 2
   60 
   61   dmas:
   62     minItems: 1
   63     items:
   64       - description: transmission DMA channel
   65       - description: reception DMA channel
   66 
   67   dma-names:
   68     minItems: 1
   69     items:
   70       - const: tx
   71       - const: rx
   72 
   73   ti,hwmods:
   74     $ref: /schemas/types.yaml#/definitions/string
   75     description: Name of hwmod associated with McASP
   76     maxItems: 1
   77     deprecated: true
   78 
   79   tx-num-evt:
   80     $ref: /schemas/types.yaml#/definitions/uint32
   81     description:
   82       configures WFIFO threshold
   83       0 disables the FIFO use
   84       if property is missing, then also FIFO use is disabled
   85 
   86   rx-num-evt:
   87     $ref: /schemas/types.yaml#/definitions/uint32
   88     description:
   89       configures RFIFO threshold
   90       0 disables the FIFO use
   91       if property is missing, then also FIFO use is disabled
   92 
   93   dismod:
   94     $ref: /schemas/types.yaml#/definitions/uint32
   95     description:
   96       specify the drive on TX pin during inactive time slots
   97       0 - 3-state, 2 - logic low, 3 - logic high
   98     enum:
   99       - 0
  100       - 2
  101       - 3
  102     default: 2
  103 
  104   interrupts:
  105     anyOf:
  106       - minItems: 1
  107         items:
  108           - description: TX interrupt
  109           - description: RX interrupt
  110       - items:
  111           - description: common/combined interrupt
  112 
  113   interrupt-names:
  114     oneOf:
  115       - minItems: 1
  116         items:
  117           - const: tx
  118           - const: rx
  119       - const: common
  120 
  121   fck_parent:
  122     $ref: /schemas/types.yaml#/definitions/string
  123     description: parent clock name for McASP fck
  124     maxItems: 1
  125 
  126   auxclk-fs-ratio:
  127     $ref: /schemas/types.yaml#/definitions/uint32
  128     description: ratio of AUCLK and FS rate if applicable
  129 
  130   gpio-controller: true
  131 
  132   "#gpio-cells":
  133     const: 2
  134 
  135   clocks:
  136     minItems: 1
  137     items:
  138       - description: functional clock
  139       - description: module specific optional ahclkx clock
  140       - description: module specific optional ahclkr clock
  141 
  142   clock-names:
  143     minItems: 1
  144     items:
  145       - const: fck
  146       - const: ahclkx
  147       - const: ahclkr
  148 
  149   power-domains:
  150     description: phandle to the corresponding power-domain
  151     maxItems: 1
  152 
  153   "#sound-dai-cells":
  154     const: 0
  155 
  156   port:
  157     description: connection for when McASP is used via graph card
  158     type: object
  159 
  160 required:
  161   - compatible
  162   - reg
  163   - reg-names
  164   - dmas
  165   - dma-names
  166   - interrupts
  167   - interrupt-names
  168 
  169 allOf:
  170   - if:
  171       properties:
  172         opmode:
  173           enum:
  174             - 0
  175 
  176     then:
  177       required:
  178         - tdm-slots
  179 
  180 additionalProperties: false
  181 
  182 examples:
  183   - |
  184     mcasp0: mcasp0@1d00000 {
  185       compatible = "ti,da830-mcasp-audio";
  186       reg = <0x100000 0x3000>;
  187       reg-names = "mpu";
  188       interrupts = <82>, <83>;
  189       interrupt-names = "tx", "rx";
  190       op-mode = <0>;            /* MCASP_IIS_MODE */
  191       tdm-slots = <2>;
  192       dmas = <&main_udmap 0xc400>, <&main_udmap 0x4400>;
  193       dma-names = "tx", "rx";
  194       serial-dir = <
  195           0 0 0 0       /* 0: INACTIVE, 1: TX, 2: RX */
  196           0 0 0 0
  197           0 0 0 1
  198           2 0 0 0 >;
  199       tx-num-evt = <1>;
  200       rx-num-evt = <1>;
  201     };

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sys/contrib/device-tree/Bindings/sound/davinci-mcasp-audio.yaml