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, pinctrl-device.yaml]

properties:
    reg:
      required: true

    interrupts:
      required: true

    clk-pin:
      type: int
      deprecated: true
      required: false
      description: |
        IMPORTANT: This option will only be used if the new pin control driver
        is not enabled.

        The CLK pin to use.

        For pins P0.0 through P0.31, use the pin number. For example,
        to use P0.16 for CLK, set:

            clk-pin = <16>;

        For pins P1.0 through P1.31, add 32 to the pin number. For
        example, to use P1.2 for CLK, set:

            clk-pin = <34>;  /* 32 + 2 */

    din-pin:
      type: int
      deprecated: true
      required: false
      description: |
        IMPORTANT: This option will only be used if the new pin control driver
        is not enabled.

        The DIN pin to use. The pin numbering scheme is the same as
        the clk-pin property's.

    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.