Touch screen not working on Android demo package

[Ravi0803]

hello guys,
i'm using sama5d3 xplained xst kit for porting custom android, i have nand flashed the android demo package given from android4sam(version 4.4.2),the bootup process working normally i.e lcd initialization etc, but there is some problems like no response on touch(module PDA4300B), SD card mount failure etc, i think that the kernel given has no BSP for sama5d3 xplained,whether was correct fault,how i add BSP to kernel, else what may be true error,pls guide me on this issue