dmic.txt

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    1 Device-Tree bindings for Digital microphone (DMIC) codec
    2 
    3 This device support generic PDM digital microphone.
    4 
    5 Required properties:
    6         - compatible: should be "dmic-codec".
    7 
    8 Optional properties:
    9         - dmicen-gpios: GPIO specifier for dmic to control start and stop
   10         - num-channels: Number of microphones on this DAI
   11         - wakeup-delay-ms: Delay (in ms) after enabling the DMIC
   12         - modeswitch-delay-ms: Delay (in ms) to complete DMIC mode switch
   13 
   14 Example node:
   15 
   16         dmic_codec: dmic@0 {
   17                 compatible = "dmic-codec";
   18                 dmicen-gpios = <&gpio4 3 GPIO_ACTIVE_HIGH>;
   19                 num-channels = <1>;
   20                 wakeup-delay-ms <50>;
   21                 modeswitch-delay-ms <35>;
   22         };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/sound/dmic.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/sound/dmic.txt