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+What: /config/usb-gadget/gadget/functions/uac1.name
+Date: June 2017
+KernelVersion: 4.14
+Description:
+ The attributes:
+
+ ===================== =======================================
+ c_chmask capture channel mask
+ c_srate list of capture sampling rates (comma-separated)
+ c_ssize capture sample size (bytes)
+ 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)
+ p_chmask playback channel mask
+ p_srate list of playback sampling rates (comma-separated)
+ 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)
+ req_number the number of pre-allocated requests
+ for both capture and playback
+ function_name name of the interface
+ ===================== =======================================