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-rw-r--r--Documentation/usb/gadget_configfs.rst10
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diff --git a/Documentation/usb/gadget_configfs.rst b/Documentation/usb/gadget_configfs.rst
index e4566ffb223f..868e118a2644 100644
--- a/Documentation/usb/gadget_configfs.rst
+++ b/Documentation/usb/gadget_configfs.rst
@@ -90,6 +90,16 @@ Then the strings can be specified::
$ echo <manufacturer> > strings/0x409/manufacturer
$ echo <product> > strings/0x409/product
+Further custom string descriptors can be created as directories within the
+language's directory, with the string text being written to the "s" attribute
+within the string's directory:
+
+ $ mkdir strings/0x409/xu.0
+ $ echo <string text> > strings/0x409/xu.0/s
+
+Where function drivers support it, functions may allow symlinks to these custom
+string descriptors to associate those strings with class descriptors.
+
2. Creating the configurations
------------------------------