There are discrepancies between the documentation and source provided in the MBPL R21 SDK packages.
1 - The Software Integration And Development Guide states:
2.1.8. Device Drivers
The following open source drivers must be used:
• RmNet Interface: open source (qmi_wwan)
• Serial Interfaces: open source serial driver (qcserial)
• /dev/ttyUSB0, DM Port
• /dev/ttyUSB1, NMEA Port (product and chipset dependent)
• /dev/ttyUSB2, AT Port
Build instructions for the device drivers are located in the USB drivers source folder
However, the USB driver is nowhere to be found in any of the downloaded source found here
2 - The pkg-readme.txt instructs to run ‘make complete’ from the pkgs directory in order to build the packages. However there is no makefile inside of MBPL_SDK_R21_ENG2-lite.bin/pkgs. How can I build the pkgs?