Multitouch device generate events question

Hi I am working on kernel driver for my multi touch device, I have a question regarding the multitouch events i need to generate from the driver I implemented protocol A events. https://www.kernel.org/doc/Documentation/input/multi-touch-protocol.txt

ABS_MT_POSITION_X x[0] ABS_MT_POSITION_Y y[0] SYN_MT_REPORT ABS_MT_POSITION_X x[1] ABS_MT_POSITION_Y y[1] SYN_MT_REPORT SYN_REPORT

But Android don't recognise button Up/Down , Can anyone post an example I am using pandaboard Linaro 4.1. ver thanks