dts/bindings/audio/nordic,nrf-pdm.yaml

# Copyright (c) 2019 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0

description: Nordic PDM (Pulse Density Modulation interface)

compatible: "nordic,nrf-pdm"

include: base.yaml

properties:
    reg:
      required: true

    interrupts:
      required: true

    clk-pin:
      type: int
      required: true
      description: CLK pin

    din-pin:
      type: int
      required: true
      description: DIN pin

    clock-source:
      type: string
      required: false
      default: "PCLK32M_HFXO"
      description: |
        Clock source to be used by the PDM peripheral. The following options
        are available:
        - "PCLK32M": 32 MHz peripheral clock, synchronous to HFCLK
        - "PCLK32M_HFXO": PCLK32M running off the 32 MHz crystal oscillator
          (HFXO) for better clock accuracy and jitter performance
        - "ACLK": Audio PLL clock with configurable frequency (frequency for
          this clock must be set via the "hfclkaudio-frequency" property
          in the "nordic,nrf-clock" node); this clock source is only available
          in the nRF53 Series SoCs and it requires the use of HFXO
      enum:
        - "PCLK32M"
        - "PCLK32M_HFXO"
        - "ACLK"

    queue-size:
      type: int
      required: false
      default: 4
      description: |
        Size of the queue of received audio data blocks to be used
        by the driver.