Documentation/devicetree/bindings/sound/microchip,sama7g5-i2smcc.yaml

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/microchip,sama7g5-i2smcc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Microchip I2S Multi-Channel Controller

maintainers:
  - Codrin Ciubotariu <codrin.ciubotariu@microchip.com>

description:
  The I2SMCC complies with the Inter-IC Sound (I2S) bus specification and
  supports a Time Division Multiplexed (TDM) interface with external
  multi-channel audio codecs. It consists of a receiver, a transmitter and a
  common clock generator that can be enabled separately to provide Adapter,
  Client or Controller modes with receiver and/or transmitter active.
  On later I2SMCC versions (starting with Microchip's SAMA7G5) I2S
  multi-channel is supported by using multiple data pins, output and
  input, without TDM.

properties:
  "#sound-dai-cells":
    const: 0

  compatible:
    oneOf:
      - enum:
          - microchip,sam9x60-i2smcc
          - microchip,sama7g5-i2smcc
      - items:
          - enum:
              - microchip,sam9x7-i2smcc
          - const: microchip,sam9x60-i2smcc

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    items:
      - description: Peripheral Bus Clock
      - description: Generic Clock (Optional). Should be set mostly when Master
          Mode is required.
    minItems: 1

  clock-names:
    items:
      - const: pclk
      - const: gclk
    minItems: 1

  dmas:
    items:
      - description: TX DMA Channel
      - description: RX DMA Channel

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

  microchip,tdm-data-pair:
    description:
      Represents the DIN/DOUT pair pins that are used to receive/send
      TDM data. It is optional and it is only needed if the controller
      uses the TDM mode.
    $ref: /schemas/types.yaml#/definitions/uint8
    enum: [0, 1, 2, 3]
    default: 0

allOf:
  - $ref: dai-common.yaml#
  - if:
      properties:
        compatible:
          const: microchip,sam9x60-i2smcc
    then:
      properties:
        microchip,tdm-data-pair: false

required:
  - "#sound-dai-cells"
  - compatible
  - reg
  - interrupts
  - clocks
  - clock-names
  - dmas
  - dma-names

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/dma/at91.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    i2s@f001c000 {
        #sound-dai-cells = <0>;
        compatible = "microchip,sam9x60-i2smcc";
        reg = <0xf001c000 0x100>;
        interrupts = <34 IRQ_TYPE_LEVEL_HIGH 7>;
        dmas = <&dma0 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) |
                       AT91_XDMAC_DT_PERID(36))>,
               <&dma0 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) |
                       AT91_XDMAC_DT_PERID(37))>;
        dma-names = "tx", "rx";
        clocks = <&i2s_clk>, <&i2s_gclk>;
        clock-names = "pclk", "gclk";
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_i2s_default>;
    };