Documentation/usb/functionfs.rst

5 From kernel point of view it is just a composite function with some
9 that kernel level composite functions provide when they are added to
12 This in particular means that the composite initialisation functions
13 may not be in init section (ie. may not use the __init tag).
22 them as needed also handling situation when numbers differ in
35 What I also want to mention is that the FunctionFS is designed in such
36 a way that it is possible to mount it several times so in the end
46   $ mkdir /dev/ffs-mtp && mount -t functionfs mtp /dev/ffs-mtp
47   $ ( cd /dev/ffs-mtp && mtp-daemon ) &
48   $ mkdir /dev/ffs-hid && mount -t functionfs hid /dev/ffs-hid
49   $ ( cd /dev/ffs-hid && hid-daemon ) &
51 On kernel level the gadget checks ffs_data->dev_name to identify
58 with listed names are accepted. In particular, if the "functions"
59 parameter's value is just a one-element list, then the behaviour