# SPDX-License-Identifier: GPL-2.0-only
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/cirrus,cs35l36.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Cirrus Logic CS35L36 Speaker Amplifier

maintainers:
  - David Rhodes <drhodes@opensource.cirrus.com>
  - patches@opensource.cirrus.com

description:
  CS35L36 is a boosted mono Class D amplifier

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

properties:
  compatible:
    enum:
      - cirrus,cs35l36

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  VA-supply:
    description: Voltage regulator of analog internal section

  VP-supply:
    description: Voltage regulator of boost converter

  reset-gpios:
    maxItems: 1

  cirrus,boost-ctl-millivolt:
    description: Boost converter output voltage (step 50)
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 2550
    maximum: 12000

  cirrus,boost-peak-milliamp:
    description: Boost-converter peak current limit (step 50)
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 4500
    minimum: 1600
    maximum: 4500

  cirrus,boost-ind-nanohenry:
    description: Initial inductor estimation reference value (1000=1μH, 1200=1.2μH)
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 1000

  cirrus,multi-amp-mode:
    description: Hi-Z ASP port when more than one amplifier in system
    type: boolean

  cirrus,boost-ctl-select:
    description: Boost converter control source selection
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 1
    enum:
      - 0 # Control Port
      - 1 # Class
      - 2 # Sync

  cirrus,amp-pcm-inv:
    description: Invert incoming PCM data when true
    type: boolean

  cirrus,imon-pol-inv:
    description: Invert polarity of outbound IMON feedback when true
    type: boolean

  cirrus,vmon-pol-inv:
    description: Invert polarity of outbound VMON feedback when true
    type: boolean

  cirrus,dcm-mode-enable:
    description: Enable boost converter automatic Discontinuous Conduction Mode
    type: boolean

  cirrus,weak-fet-disable:
    description: Reduce output driver strength in Weak-FET Drive Mode when true
    type: boolean

  cirrus,classh-wk-fet-delay-ms:
    description: Weak-FET entry delay
    default: 100
    enum: [0, 5, 10, 50, 100, 200, 500, 1000]

  cirrus,classh-weak-fet-thld-millivolt:
    description: Weak-FET drive threshold
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700]

  cirrus,temp-warn-threshold:
    description: Overtemperature warning threshold
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 2
    enum:
      - 0 # 105°C
      - 1 # 115°C
      - 2 # 125°C
      - 3 # 135°C

  cirrus,irq-drive-select:
    description: Interrupt output driver type
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 1
    enum:
      - 0 # open-drain
      - 1 # push-pull

  cirrus,irq-gpio-select:
    description: Programmable IRQ pin selection
    $ref: /schemas/types.yaml#/definitions/uint32
    enum:
      - 0 # PDM_DATA/SWIRE_SD/INT
      - 1 # GPIO

  cirrus,vpbr-config:
    $ref: "#/$defs/vpbr-config"

$defs:
  vpbr-config:
    description: Brownout prevention configuration sub-node
    type: object
    additionalProperties: false

    properties:
      cirrus,vpbr-en:
        description: VBST brownout prevention enable
        $ref: /schemas/types.yaml#/definitions/uint32
        default: 0
        enum:
          - 0 # disabled
          - 1 # enabled

      cirrus,vpbr-thld:
        description: Initial VPBR threshold voltage
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 2
        maximum: 31

      cirrus,vpbr-atk-rate:
        description: Attenuation attack step rate
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 7

      cirrus,vpbr-atk-vol:
        description: VP brownout prevention step size
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 7

      cirrus,vpbr-max-attn:
        description: Maximum attenuation during VP brownout prevention (dB)
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 15

      cirrus,vpbr-wait:
        description: Delay between brownout clearance and attenuation release (ms)
        $ref: /schemas/types.yaml#/definitions/uint32
        default: 1
        enum:
          - 0 # 10
          - 1 # 100
          - 2 # 250
          - 3 # 500

      cirrus,vpbr-rel-rate:
        description: Attenuation release step rate
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 7

      cirrus,vpbr-mute-en:
        description: Mute audio if maximum attenuation reached
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 1

required:
  - compatible
  - reg
  - interrupts
  - VA-supply
  - cirrus,boost-ctl-millivolt
  - cirrus,boost-peak-milliamp

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>
    #include <dt-bindings/interrupt-controller/irq.h>
 
    i2c {
        #address-cells = <1>;
        #size-cells = <0>;
 
        codec@40 {
            compatible = "cirrus,cs35l36";
            reg = <0x40>;
            VA-supply = <&dummy_vreg>;
            VP-supply = <&dummy_vreg>;
            reset-gpios = <&gpio0 54 GPIO_ACTIVE_HIGH>;
            interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
 
            cirrus,boost-ind-nanohenry = <1000>;
            cirrus,boost-ctl-millivolt = <10000>;
            cirrus,boost-peak-milliamp = <4500>;
            cirrus,boost-ctl-select = <0>;
            cirrus,classh-wk-fet-delay-ms = <100>;
            cirrus,classh-weak-fet-thld-millivolt = <100>;
            cirrus,temp-warn-threshold = <1>;
            cirrus,multi-amp-mode;
            cirrus,irq-drive-select = <1>;
            cirrus,irq-gpio-select = <1>;
 
            cirrus,vpbr-config {
                cirrus,vpbr-en = <0>;
                cirrus,vpbr-thld = <5>;
                cirrus,vpbr-atk-rate = <2>;
                cirrus,vpbr-atk-vol = <1>;
                cirrus,vpbr-max-attn = <9>;
                cirrus,vpbr-wait = <1>;
                cirrus,vpbr-rel-rate = <5>;
                cirrus,vpbr-mute-en = <0>;
            };
        };
    };

...