xref: /linux/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml (revision 1ac731c529cd4d6adbce134754b51ff7d822b145)

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/cirrus,cs35l41.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Cirrus Logic CS35L41 Speaker Amplifier

maintainers:
  - david.rhodes@cirrus.com

description: |
  CS35L41 is a boosted mono Class D amplifier with DSP
  speaker protection and equalization

properties:
  compatible:
    enum:
      - cirrus,cs35l40
      - cirrus,cs35l41

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  '#sound-dai-cells':
    description:
      The first cell indicating the audio interface.
    const: 1

  reset-gpios:
    maxItems: 1

  VA-supply:
    description: voltage regulator phandle for the VA supply

  VP-supply:
    description: voltage regulator phandle for the VP supply

  cirrus,boost-peak-milliamp:
    description:
      Boost-converter peak current limit in mA.
      Configures the peak current by monitoring the current through the boost FET.
      Range starts at 1600 mA and goes to a maximum of 4500 mA with increments
      of 50 mA. See section 4.3.6 of the datasheet for details.
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 1600
    maximum: 4500
    default: 4500

  cirrus,boost-ind-nanohenry:
    description:
      Boost inductor value, expressed in nH. Valid
      values include 1000, 1200, 1500 and 2200.
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 1000
    maximum: 2200

  cirrus,boost-cap-microfarad:
    description:
      Total equivalent boost capacitance on the VBST
      and VAMP pins, derated at 11 volts DC. The value must be rounded to the
      nearest integer and expressed in uF.
    $ref: /schemas/types.yaml#/definitions/uint32

  cirrus,asp-sdout-hiz:
    description:
      Audio serial port SDOUT Hi-Z control. Sets the Hi-Z
      configuration for SDOUT pin of amplifier.
      0 = Logic 0 during unused slots, and while all transmit channels disabled
      1 = Hi-Z during unused slots but logic 0 while all transmit channels disabled
      2 = (Default) Logic 0 during unused slots, but Hi-Z while all transmit channels disabled
      3 = Hi-Z during unused slots and while all transmit channels disabled
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 3
    default: 2

  cirrus,boost-type:
    description:
      Configures the type of Boost being used.
      Internal boost requires boost-peak-milliamp, boost-ind-nanohenry and
      boost-cap-microfarad.
      External Boost must have GPIO1 as GPIO output. GPIO1 will be set high to
      enable boost voltage.
      Shared boost allows two amplifiers to share a single boost circuit by
      communicating on the MDSYNC bus. The active amplifier controls the boost
      circuit using combined data from both amplifiers. GPIO1 should be
      configured for Sync when shared boost is used. Shared boost is not
      compatible with External boost. Active amplifier requires
      boost-peak-milliamp, boost-ind-nanohenry and boost-cap-microfarad.
      0 = Internal Boost
      1 = External Boost
      2 = Shared Boost Active
      3 = Shared Boost Passive
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 3

  cirrus,gpio1-polarity-invert:
    description:
      Boolean which specifies whether the GPIO1
      level is inverted. If this property is not present the level is not inverted.
    type: boolean

  cirrus,gpio1-output-enable:
    description:
      Boolean which specifies whether the GPIO1 pin
      is configured as an output. If this property is not present the
      pin will be configured as an input.
    type: boolean

  cirrus,gpio1-src-select:
    description:
      Configures the function of the GPIO1 pin.
      Note that the options are different from the GPIO2 pin
      0 = High Impedance (Default)
      1 = GPIO
      2 = Sync
      3 = MCLK input
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 3

  cirrus,gpio2-polarity-invert:
    description:
      Boolean which specifies whether the GPIO2
      level is inverted. If this property is not present the level is not inverted.
    type: boolean

  cirrus,gpio2-output-enable:
    description:
      Boolean which specifies whether the GPIO2 pin
      is configured as an output. If this property is not present the
      pin will be configured as an input.
    type: boolean

  cirrus,gpio2-src-select:
    description:
      Configures the function of the GPIO2 pin.
      Note that the options are different from the GPIO1 pin.
      0 = High Impedance (Default)
      1 = GPIO
      2 = Open Drain INTB
      3 = MCLK input
      4 = Push-pull INTB (active low)
      5 = Push-pull INT (active high)
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 5

required:
  - compatible
  - reg
  - "#sound-dai-cells"

allOf:
  - $ref: dai-common.yaml#
  - if:
      properties:
        cirrus,boost-type:
          const: 0
    then:
      required:
        - cirrus,boost-peak-milliamp
        - cirrus,boost-ind-nanohenry
        - cirrus,boost-cap-microfarad
    else:
      if:
        properties:
          cirrus,boost-type:
            const: 1
      then:
        required:
          - cirrus,gpio1-output-enable
          - cirrus,gpio1-src-select
        properties:
          cirrus,boost-peak-milliamp: false
          cirrus,boost-ind-nanohenry: false
          cirrus,boost-cap-microfarad: false
          cirrus,gpio1-src-select:
            enum: [1]

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>

    spi {
        #address-cells = <1>;
        #size-cells = <0>;

        cs35l41: speaker-amp@2 {
            #sound-dai-cells = <1>;
            compatible = "cirrus,cs35l41";
            reg = <2>;
            VA-supply = <&dummy_vreg>;
            VP-supply = <&dummy_vreg>;
            reset-gpios = <&gpio 110 GPIO_ACTIVE_HIGH>;

            cirrus,boost-type = <0>;
            cirrus,boost-peak-milliamp = <4500>;
            cirrus,boost-ind-nanohenry = <1000>;
            cirrus,boost-cap-microfarad = <15>;
        };
    };