Documentation/devicetree/bindings/sound/qcom,wcd939x.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/sound/qcom,wcd939x.yaml

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System
Linux kernel
Corpus path
Documentation/devicetree/bindings/sound/qcom,wcd939x.yaml
Extension
.yaml
Size
2938 bytes
Lines
100
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

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Annotated Snippet

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/qcom,wcd939x.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Qualcomm WCD9380/WCD9385 Audio Codec

maintainers:
  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

description: |
  Qualcomm WCD9390/WCD9395 Codec is a standalone Hi-Fi audio codec IC.
  It has RX and TX Soundwire devices.
  The WCD9390/WCD9395 IC has a functionally separate USB-C Mux subsystem
  accessible over an I2C interface.
  The Audio Headphone and Microphone data path between the Codec and the USB-C Mux
  subsystems are external to the IC, thus requiring DT port-endpoint graph description
  to handle USB-C altmode & orientation switching for Audio Accessory Mode.

allOf:
  - $ref: dai-common.yaml#
  - $ref: qcom,wcd93xx-common.yaml#

properties:
  compatible:
    oneOf:
      - const: qcom,wcd9390-codec
      - items:
          - const: qcom,wcd9395-codec
          - const: qcom,wcd9390-codec

  mode-switch:
    description: Flag the port as possible handler of altmode switching
    type: boolean

  orientation-switch:
    description: Flag the port as possible handler of orientation switching
    type: boolean

  port:
    $ref: /schemas/graph.yaml#/properties/port
    description:
      A port node to link the WCD939x Codec node to USB MUX subsystems for the
      purpose of handling altmode muxing and orientation switching to detect and
      enable Audio Accessory Mode.

  vdd-px-supply:
    description: A reference to the 1.2V PX supply

required:
  - compatible

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>
    codec {
        compatible = "qcom,wcd9390-codec";
        reset-gpios = <&tlmm 32 GPIO_ACTIVE_LOW>;
        #sound-dai-cells = <1>;
        qcom,tx-device = <&wcd939x_tx>;
        qcom,rx-device = <&wcd939x_rx>;
        qcom,micbias1-microvolt = <1800000>;
        qcom,micbias2-microvolt = <1800000>;
        qcom,micbias3-microvolt = <1800000>;
        qcom,micbias4-microvolt = <1800000>;
        qcom,hphl-jack-type-normally-closed;
        qcom,ground-jack-type-normally-closed;

Annotation

Implementation Notes