I am trying to setup Android Image to have the USB TTY driver. By using the menuconfig, the menu "Device Drivers" -> "USB support" -> "USB Serial Converter support" -> "USB Generic Serial Driver". Save the menuconfig, and build the kernel_imx. I modified the init.rc to add "chmod 0777 /dev/ttyACM*" to change mode. I flash to Android image into Sabre tablet, and power it up. I plug USB cable from the Sabre tablet into Kenetic ARM tower. But I don't see Android enum the USB device.
Can anyone who know how to setup Sabre Tablet to support USB TTY?