linux/Documentation/devicetree/bindings/sound/imx-audmux.txt
<<
>>
Prefs
   1Freescale Digital Audio Mux (AUDMUX) device
   2
   3Required properties:
   4- compatible : "fsl,imx21-audmux" for AUDMUX version firstly used on i.MX21,
   5  or "fsl,imx31-audmux" for the version firstly used on i.MX31.
   6- reg : Should contain AUDMUX registers location and length
   7
   8Example:
   9
  10audmux@021d8000 {
  11        compatible = "fsl,imx6q-audmux", "fsl,imx31-audmux";
  12        reg = <0x021d8000 0x4000>;
  13};
  14