# Copyright (c) 2023 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0

description: USB Audio Class 2 Clock Source entity

compatible: "zephyr,uac2-clock-source"

properties:
  clock-type:
    type: string
    required: true
    description: |
      Clock Type indicating whether the Clock Source represents an external
      clock or an internal clock with either fixed frequency, variable
      frequency, or programmable frequency.
    enum:
      - "external"
      - "internal-fixed"
      - "internal-variable"
      - "internal-programmable"

  sof-synchronized:
    type: boolean
    description: |
      True if clock is synchronized to USB Start of Frame. False if clock is
      free running. External clock must be free running.

  frequency-control:
    type: string
    description: Clock Frequency Control capabilities
    enum:
      - "read-only"
      - "host-programmable"

  validity-control:
    type: string
    description: Clock Validity Control capabilities
    enum:
      - "read-only"

  assoc-terminal:
    type: phandle
    description: |
      Input or Output Terminal associated with this Clock Source. Set if clock
      is derived from USB OUT data endpoint (point the handle to respective
      Input Terminal) or from input signal on S/PDIF connector.

  sampling-frequencies:
    type: array
    required: true
    description: |
      Sampling Frequencies, in Hz, this Clock Source Entity can generate.