usb: gadget: configfs: OS String support
authorAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Thu, 8 May 2014 12:06:25 +0000 (14:06 +0200)
committerFelipe Balbi <balbi@ti.com>
Wed, 14 May 2014 14:39:14 +0000 (09:39 -0500)
commit87213d388e927aaa88b21d5ff7e1f75ca2288da1
treed68f947c50a65e662abdc6885b2f5ce801fd5013
parentde7a8d2d534fb3c35c29762b8a7d14e5b1937d6f
usb: gadget: configfs: OS String support

Add handling of OS String extension from the configfs interface.
A directory "os_desc" is added at the top level of a gadget's
directories hierarchy. In the "os_desc" directory there are
three attributes: "use", "b_vendor_code" and "qw_sign".
If "use" contains "0" the OS string is not reported to the host.
"b_vendor_code" contains a one-byte value which is used
for custom per-device and per-interface requests.
"qw_sign" contains an identifier to be reported as the "OS String"
proper.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Documentation/ABI/testing/configfs-usb-gadget
drivers/usb/gadget/configfs.c