| What: /config/usb-gadget/gadget/functions/acm.name | |
| Date: Jun 2013 | |
| KernelVersion: 3.11 | |
| Description: | |
| This item contains just one readonly attribute: port_num. | |
| It contains the port number of the /dev/ttyGS<n> device | |
| associated with acm function's instance "name". |