Documentation/devicetree/bindings/sound/nuvoton,nau8821.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/nuvoton,nau8821.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NAU88L21 audio codec

maintainers:
  - Seven Lee <wtli@nuvoton.com>

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

properties:
  compatible:
    const: nuvoton,nau8821

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  nuvoton,jkdet-enable:
    description: Enable jack detection via JKDET pin.
    type: boolean

  nuvoton,jkdet-pull-enable:
    description: Enable JKDET pin pull. If set - pin pull enabled,
      otherwise pin in high impedance state.
    type: boolean

  nuvoton,jkdet-pull-up:
    description: Pull-up JKDET pin. If set then JKDET pin is pull up,
      otherwise pull down.
    type: boolean

  nuvoton,key-enable:
    description: handles key press detection.
    type: boolean

  nuvoton,jkdet-polarity:
    description: JKDET pin polarity.
    $ref: /schemas/types.yaml#/definitions/uint32
    enum:
      - 0 # active high
      - 1 # active low
    default: 1

  nuvoton,micbias-voltage:
    description: MICBIAS output level select.
    $ref: /schemas/types.yaml#/definitions/uint32
    enum:
      - 0 # VDDA
      - 1 # VDDA * 1
      - 2 # VDDA * 1.1
      - 3 # VDDA * 1.2
      - 4 # VDDA * 1.3
      - 5 # VDDA * 1.4
      - 6 # VDDA * 1.53
      - 7 # VDDA * 1.53
    default: 6

  nuvoton,vref-impedance:
    description: VMID Tie-off impedance select.
    $ref: /schemas/types.yaml#/definitions/uint32
    enum:
      - 0 # open
      - 1 # 25KOhms
      - 2 # 125KOhms
      - 3 # 2.5KOhms
    default: 2

  nuvoton,jack-insert-debounce:
    description: number from 0 to 7 that sets debounce time to 2^(n+2)ms.
    $ref: /schemas/types.yaml#/definitions/uint32
    maximum: 7
    default: 7

  nuvoton,jack-eject-debounce:
    description: number from 0 to 7 that sets debounce time to 2^(n+2)ms.
    $ref: /schemas/types.yaml#/definitions/uint32
    maximum: 7
    default: 0

  nuvoton,dmic-clk-threshold:
    description: DMIC clock speed expected value. Unit is Hz.
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 3072000

  nuvoton,dmic-slew-rate:
    description: The range 0 to 7 represents the speed of DMIC slew rate.
        The lowest value 0 means the slowest rate and the highest value
        7 means the fastest rate.
    $ref: /schemas/types.yaml#/definitions/uint32
    maximum: 7
    default: 0

  nuvoton,left-input-single-end:
    description: Enable left input with single-ended settings if set.
        For the headset mic application, the single-ended control is
        just limited to the left adc for design demand.
    type: boolean

  nuvoton,adc-delay-ms:
    description: Delay (in ms) to make input path stable and avoid pop noise.
    minimum: 125
    maximum: 500
    default: 125

  '#sound-dai-cells':
    const: 0

required:
  - compatible
  - reg

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>
    #include <dt-bindings/interrupt-controller/irq.h>
    i2c {
        #address-cells = <1>;
        #size-cells = <0>;
        codec@1b {
            compatible = "nuvoton,nau8821";
            reg = <0x1b>;
            interrupt-parent = <&gpio>;
            interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
            nuvoton,jkdet-enable;
            nuvoton,jkdet-pull-enable;
            nuvoton,jkdet-pull-up;
            nuvoton,key-enable;
            nuvoton,left-input-single-end;
            nuvoton,jkdet-polarity = <GPIO_ACTIVE_LOW>;
            nuvoton,micbias-voltage = <6>;
            nuvoton,vref-impedance = <2>;
            nuvoton,jack-insert-debounce = <7>;
            nuvoton,jack-eject-debounce = <0>;
            nuvoton,dmic-clk-threshold = <3072000>;
            nuvoton,dmic-slew-rate = <0>;
            nuvoton,adc-delay-ms = <125>;
            #sound-dai-cells = <0>;
        };
    };