I modprobe g_multi driver
$ modprobe g_multi file=/dev/mmcblk2p1
On Linux host machine. I found 1 CDC ACM (ttyACM0), 1 RNDS (Ethernet), and Mass Storage. It seems that the driver work correctly, but I need 2 CDC ACM and I don't need MASS STORAGE.
How to disable MASS STORAGE and enable 2 CDC ACM (ttyACM0, ttyACM1)?