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

description: USB Audio Class 2 instance

compatible: "zephyr,uac2"

# Child nodes of "zephyr,uac2" compatibles are supposed to be Audio Control
# entities, i.e. clock sources, input terminals, output terminals, etc.
# After all Audio Control entities, the Audio Streaming interface compatibles
# should follow (as child nodes of "zephyr,uac2").
#
# The only reason for putting Audio Streaming interfaces at the end is because
# Audio Control entities derive their unique ID from child index (+ 1). For most
# cases the order shouldn't really matter, but if there happen to be maximum
# possible number of entities (255) then the Audio Streaming would inadvertently
# "consume" one of the available IDs.

properties:
  audio-function:
    type: int
    required: true
    description: |
      Constant, indicating the primary use of this audio function, as intended
      by the manufacturer. Use Audio Function category codes define from
      dt-bindings/usb/audio.h.

  interrupt-endpoint:
    type: boolean
    description: |
      Enable to support an optional interrupt endpoint to inform the Host about
      dynamic changes that occur on the different addressable entities.

  latency-control:
    type: string
    description: Latency Control capabilities
    enum:
      - "read-only"
      - "host-programmable"