Documentation/usb/gadget_configfs.rst

50 http://www.spinics.net/lists/linux-usb/msg76388.html)
55 	$ mount none $CONFIGFS_HOME -t configfs
60 -----------------------
76 Each gadget needs to have its vendor id <VID> and product id <PID> specified::
83 for each language, e.g.::
94 language's directory, with the string text being written to the "s" attribute
104 ------------------------------
121 for each language, e.g.::
134 -------------------------
150 Each function provides its specific set of attributes, with either read-only
151 or read-write access. Where applicable they need to be written to as
153 Please refer to Documentation/ABI/testing/configfs-usb-gadget for more information.
156 ------------------------------------------------------
164 	$ ln -s functions/<name>.<instance name> configs/<name>.<number>
168 	$ ln -s functions/ncm.usb0 configs/c.1
175 ----------------------
190   ./configs/c.1/ncm.usb0 -> ../../../../usb_gadget/g1/functions/ncm.usb0
223 	$ echo s3c-hsotg > UDC
227 -----------------------
234 --------------
314 which can be read-only or read-write, depending on what they represent.
318 configured elements. However, they are embedded in usage-specific
327      +--sa    (file)
349                          +----------------------------------+
351   +-----------------+    |  (*store)(cs *, buffer, length); |
353   | +-------------+ |    |       +------------------+       |
354   | | struct      |-|----|------>|struct            |       |
356   | +-------------+ |    |       +------------------+       |
357   |                 |    +----------------------------------+
360   +-----------------+                .
364 a number of its default sub-groups created automatically.
372 idProduct etc) and default sub-groups (configs, functions, strings).
374 appropriate locations. In the configs, functions and strings sub-groups
375 a user can create their sub-groups to represent configurations, functions,
376 and groups of strings in a given language.
387 	- gadget's config_group
388 	- gadget's default groups (configs, functions, strings)
389 	- associating functions with configurations (symlinks)