# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/nvidia,tegra20-spdif.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NVIDIA Tegra20 S/PDIF Controller

description: |
  The S/PDIF controller supports both input and output in serial audio
  digital interface format. The input controller can digitally recover
  a clock from the received stream. The S/PDIF controller is also used
  to generate the embedded audio for HDMI output channel.

maintainers:
  - Thierry Reding <treding@nvidia.com>
  - Jon Hunter <jonathanh@nvidia.com>

allOf:
  - $ref: dai-common.yaml#

properties:
  compatible:
    const: nvidia,tegra20-spdif

  reg:
    maxItems: 1

  resets:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    minItems: 2

  clock-names:
    items:
      - const: out
      - const: in

  dmas:
    minItems: 2

  dma-names:
    items:
      - const: rx
      - const: tx
 
  "#sound-dai-cells":
    const: 0

  nvidia,fixed-parent-rate:
    description: |
      Specifies whether board prefers parent clock to stay at a fixed rate.
      This allows multiple Tegra20 audio components work simultaneously by
      limiting number of supportable audio rates.
    type: boolean

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

unevaluatedProperties: false

examples:
  - |
    spdif@70002400 {
        compatible = "nvidia,tegra20-spdif";
        reg = <0x70002400 0x200>;
        interrupts = <77>;
        clocks = <&clk 99>, <&clk 98>;
        clock-names = "out", "in";
        resets = <&rst 10>;
        dmas = <&apbdma 3>, <&apbdma 3>;
        dma-names = "rx", "tx";
        #sound-dai-cells = <0>;
    };

...