Linux/AM3352: TCA8418 I2C Matrix Keypad Same Key with Multiple Function(Special Character)

Part Number:AM3352

Tool/software: Linux

Hi All, 

    We are using AM3352 Processor with TI Staging Linux 4.1.18 and we need help form your side about TCA8418 I2C Matrix Keypad Same Key with Multiple Function. In my product Qwerty key(A-Z, a-z) working properly but Special characters not working.