1. 根目录:
2. Documentation
3. devicetree
4. bindings
5. sound
6. widgets.txt

Widgets:

This mainly specifies audio off-codec DAPM widgets.

Each entry is a pair of strings in DT:

	"template-wname", "user-supplied-wname"

The "template-wname" being the template widget name and currently includes:
"Microphone", "Line", "Headphone" and "Speaker".

The "user-supplied-wname" being the user specified widget name.

For instance:
	simple-audio-widgets =
		"Microphone", "Microphone Jack",
		"Line", "Line In Jack",
		"Line", "Line Out Jack",
		"Headphone", "Headphone Jack",
		"Speaker", "Speaker External";