CHIP-linux-libre/Documentation/devicetree/bindings/sound/omap-twl4030.txt

* Texas Instruments SoC with twl4030 based audio setups

Required properties:
- compatible: "ti,omap-twl4030"
- ti,model: Name of the sound card (for example "omap3beagle")
- ti,mcbsp: phandle for the McBSP node

Optional properties:
- ti,codec: phandle for the twl4030 audio node
- ti,mcbsp-voice: phandle for the McBSP node connected to the voice port of twl
- ti, jack-det-gpio: Jack detect GPIO
- ti,audio-routing: List of connections between audio components.
  Each entry is a pair of strings, the first being the connection's sink,
  the second being the connection's source.
  If the routing is not provided all possible connection will be available

Available audio endpoints for the audio-routing table:

Board connectors:
 * Headset Stereophone
 * Earpiece Spk
 * Handsfree Spk
 * Ext Spk
 * Main Mic
 * Sub Mic
 * Headset Mic
 * Carkit Mic
 * Digital0 Mic
 * Digital1 Mic
 * Line In

twl4030 pins:
 * HSOL
 * HSOR
 * EARPIECE
 * HFL
 * HFR
 * PREDRIVEL
 * PREDRIVER
 * CARKITL
 * CARKITR
 * MAINMIC
 * SUBMIC
 * HSMIC
 * DIGIMIC0
 * DIGIMIC1
 * CARKITMIC
 * AUXL
 * AUXR

 * Headset Mic Bias
 * Mic Bias 1 /* Used for Main Mic or Digimic0 */
 * Mic Bias 2 /* Used for Sub Mic or Digimic1 */

Example:

sound {
	compatible = "ti,omap-twl4030";
	ti,model = "omap3beagle";

	ti,mcbsp = <&mcbsp2>;
};