SL6087 usb driver in linux

My customer use the linux in ARM, kernel version: 2.6.21, the USB drvier version is 1.7.36; when the module connected to the device using USB, it can appear some trace information from the device. but use “ls” command, it can’t mount the USB device. anyone can give some suggestion?

“ls” command just provides the list, so make sure you use lsmod command.
The driver to be used depends upon whether you are using the serial port of the device or the USB port to connect to the module.
In the case if you are using the USB port of the device you need to give “lsmod | grep cdc-acm” command.