The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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

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    1 * SiRF atlas6 and prima2 internal audio codec and port based audio setups
    2 
    3 Required properties:
    4 - compatible: "sirf,sirf-audio-card"
    5 - sirf,audio-platform: phandle for the platform node
    6 - sirf,audio-codec: phandle for the SiRF internal codec node
    7 
    8 Optional properties:
    9 - hp-pa-gpios: Need to be present if the board need control external
   10   headphone amplifier.
   11 - spk-pa-gpios: Need to be present if the board need control external
   12   speaker amplifier.
   13 - hp-switch-gpios: Need to be present if the board capable to detect jack
   14   insertion, removal.
   15 
   16 Available audio endpoints for the audio-routing table:
   17 
   18 Board connectors:
   19  * Headset Stereophone
   20  * Ext Spk
   21  * Line In
   22  * Mic
   23 
   24 SiRF internal audio codec pins:
   25  * HPOUTL
   26  * HPOUTR
   27  * SPKOUT
   28  * Ext Mic
   29  * Mic Bias
   30 
   31 Example:
   32 
   33 sound {
   34                 compatible = "sirf,sirf-audio-card";
   35                 sirf,audio-codec = <&audiocodec>;
   36                 sirf,audio-platform = <&audioport>;
   37                 hp-pa-gpios = <&gpio 44 0>;
   38                 spk-pa-gpios = <&gpio 46 0>;
   39                 hp-switch-gpios = <&gpio 45 0>;
   40 };
   41

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