What: /config/usb-gadget/gadget/functions/hid.name
Date: Nov 2014
KernelVersion: 3.19
Description:
The attributes:
protocol - HID protocol to use
report_desc - blob corresponding to HID report descriptors
except the data passed through /dev/hidg<N>
report_length - HID report length
subclass - HID device subclass to use
kernel add