Documentation/devicetree/bindings/sound/adi,max98396.yaml


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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/adi,max98396.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Analog Devices MAX98396 Speaker Amplifier

maintainers:
  - Ryan Lee <ryans.lee@analog.com>

description:
  The MAX98396 is a mono Class-DG speaker amplifier with I/V sense.
  The device provides a PCM interface for audio data and a standard
  I2C interface for control data communication.
  The MAX98397 is a variant of MAX98396 with wide input supply range.

properties:
  compatible:
    enum:
      - adi,max98396
      - adi,max98397
  reg:
    maxItems: 1
    description: I2C address of the device.

  avdd-supply:
    description: A 1.8V supply that powers up the AVDD pin.

  dvdd-supply:
    description: A 1.2V supply that powers up the DVDD pin.

  dvddio-supply:
    description: A 1.2V or 1.8V supply that powers up the VDDIO pin.

  pvdd-supply:
    description: A 3.0V to 20V supply that powers up the PVDD pin.

  vbat-supply:
    description: A 3.3V to 5.5V supply that powers up the VBAT pin.

  adi,vmon-slot-no:
    description: slot number of the voltage sense monitor
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 15
    default: 0

  adi,imon-slot-no:
    description: slot number of the current sense monitor
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 15
    default: 1

  adi,spkfb-slot-no:
    description: slot number of speaker DSP monitor
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 15
    default: 2

  adi,bypass-slot-no:
    description:
      Selects the PCM data input channel that is routed to the speaker
      audio processing bypass path.
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 15
    default: 0

  adi,interleave-mode:
    description:
      For cases where a single combined channel for the I/V sense data
      is not sufficient, the device can also be configured to share
      a single data output channel on alternating frames.
      In this configuration, the current and voltage data will be frame
      interleaved on a single output channel.
    type: boolean

  adi,dmon-stuck-enable:
    description:
      Enables the "data monitor stuck" feature. Once the data monitor is
      enabled, it actively monitors the selected input data (from DIN) to the
      speaker amplifier. Once a data error is detected, the data monitor
      automatically places the device into software shutdown.
    type: boolean

  adi,dmon-stuck-threshold-bits:
    description:
      Sets the threshold for the "data monitor stuck" feature, in bits.
    enum: [9, 11, 13, 15]
    default: 15

  adi,dmon-magnitude-enable:
    description:
      Enables the "data monitor magnitude" feature. Once the data monitor is
      enabled, it actively monitors the selected input data (from DIN) to the
      speaker amplifier. Once a data error is detected, the data monitor
      automatically places the device into software shutdown.
    type: boolean

  adi,dmon-magnitude-threshold-bits:
    description:
      Sets the threshold for the "data monitor magnitude" feature, in bits.
    enum: [2, 3, 4, 5]
    default: 5

  adi,dmon-duration-ms:
    description:
      Sets the duration for the "data monitor" feature, in milliseconds.
    enum: [64, 256, 1024, 4096]
    default: 64

  reset-gpios:
    maxItems: 1

required:
  - compatible
  - reg

additionalProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>
    i2c {
        #address-cells = <1>;
        #size-cells = <0>;
        max98396: amplifier@39 {
            compatible = "adi,max98396";
            reg = <0x39>;
            dvdd-supply = <&regulator_1v2>;
            dvddio-supply = <&regulator_1v8>;
            avdd-supply = <&regulator_1v8>;
            pvdd-supply = <&regulator_pvdd>;
            adi,vmon-slot-no = <0>;
            adi,imon-slot-no = <1>;
            reset-gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
        };
    };