What:		/config/usb-gadget/gadget/functions/uac2.name
Date:		Sep 2014
KernelVersion:	3.18
Description:
		The attributes:

		=========  ============================
		c_chmask   capture channel mask
		c_srate    capture sampling rate
		c_ssize    capture sample size (bytes)
		c_sync     capture synchronization type (async/adaptive)
		c_mute_present	capture mute control enable
		c_volume_present	capture volume control enable
		c_volume_min	capture volume control min value (in 1/256 dB)
		c_volume_max	capture volume control max value (in 1/256 dB)
		c_volume_res	capture volume control resolution (in 1/256 dB)
		fb_max     maximum extra bandwidth in async mode
		p_chmask   playback channel mask
		p_srate    playback sampling rate
		p_ssize    playback sample size (bytes)
		p_mute_present	playback mute control enable
		p_volume_present	playback volume control enable
		p_volume_min	playback volume control min value (in 1/256 dB)
		p_volume_max	playback volume control max value (in 1/256 dB)
		p_volume_res	playback volume control resolution (in 1/256 dB)
		=========  ============================