1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/usb/gadget-testing.rst b/Documentation/usb/gadget-testing.rst
index 077dfac7ed98..bf555c2270f5 100644
--- a/Documentation/usb/gadget-testing.rst
+++ b/Documentation/usb/gadget-testing.rst
@@ -206,6 +206,14 @@ the standard procedure for using FunctionFS (mount it, run the userspace
 process which implements the function proper). The gadget should be enabled
 by writing a suitable string to usb_gadget/<gadget>/UDC.
 
+The FFS function provides just one attribute in its function directory:
+
+	ready
+
+The attribute is read-only and signals if the function is ready (1) to be
+used, E.G. if userspace has written descriptors and strings to ep0, so
+the gadget can be enabled.
+
 Testing the FFS function
 ------------------------
 
@@ -757,6 +765,17 @@ The uac2 function provides these attributes in its function directory:
 	req_number       the number of pre-allocated request for both capture
 	                 and playback
 	function_name    name of the interface
+	if_ctrl_name     topology control name
+	clksrc_in_name   input clock name
+	clksrc_out_name  output clock name
+	p_it_name        playback input terminal name
+	p_it_ch_name     playback input first channel name
+	p_ot_name        playback output terminal name
+	p_fu_vol_name    playback function unit name
+	c_it_name        capture input terminal name
+	c_it_ch_name     capture input first channel name
+	c_ot_name        capture output terminal name
+	c_fu_vol_name    capture functional unit name
 	c_terminal_type  code of the capture terminal type
 	p_terminal_type  code of the playback terminal type
 	================ ====================================================
@@ -949,6 +968,14 @@ The uac1 function provides these attributes in its function directory:
 	req_number       the number of pre-allocated requests for both capture
 	                 and playback
 	function_name    name of the interface
+	p_it_name        playback input terminal name
+	p_it_ch_name     playback channels name
+	p_ot_name        playback output terminal name
+	p_fu_vol_name    playback mute/volume functional unit name
+	c_it_name        capture input terminal name
+	c_it_ch_name     capture channels name
+	c_ot_name        capture output terminal name
+	c_fu_vol_name    capture mute/volume functional unit name
 	================ ====================================================
 
 The attributes have sane default values.