> Hi Bolan, > so you already know that other versions of the card will have the pid > 0x01a1 and the serial interfaces will be of class ff but you don't know what those interfaces will be used for? > You shall only add driver support for what you know today and not for something that might or might not be implemented in the future. > For the device with pid 0x0115 you have listed an adb interface and adb interfaces should not be in the option driver. Hi Lars: Ok, I will remove 0x01a1 from option serial driver. And the adb listed in pid 0x0115 will also be removed. Actually adb interface info with pid 0x0115 is: Class_ff&SubClass_42&Prot_01, the option driver will not bind it? I will resubmit a new patch, please help review and abandon this. thanks bolan