Finding right Android touchscreen driver file

Question

My goal is to add a single printk command to one of the driver files for my phone's touchscreen. I would like to run this printk command everytime the screen recieves touch input. I found the list of touchscreen driver files shown below. I'm just hoping someone with some experience might be able to point me to the correct file to place this printk command.

ad7877.c       atmel_224e.c    cy8ctmg110_ts.c  gunze.c           intel-mid-touch.c
max11801_ts.c  pcap_ts.c       touchit213.c     ucb1400_ts.c      wm9712.c  
ad7879.c       atmel_mxt_ts.c  da9034-ts.c      h3600_ts_input.c  jornada720_ts.c
mc13783_ts.c   penmount.c      touchright.c     usbtouchscreen.c  wm9713.c
ad7879.h       atmel_tsadcc.c  dynapro.c        hampshire.c       Kconfig 
mcs5000_ts.c   s3c2410_ts.c    touchwin.c       w90p910_ts.c      wm97xx-core.c
ad7879-i2c.c   atmel-wm97xx.c  eeti_ts.c        hp680_ts_input.c  lpc32xx_ts.c  
migor_ts.c     st1232.c        tps6507x-ts.c    wacom_w8001.c     zylonite-wm97xx.c
ad7879-spi.c   bu21013_ts.c    elo.c            htcpen.c          mainstone-wm97xx.c
mk712.c        stmpe-ts.c      tsc2005.c        wm831x-ts.c

Answer 1

First Check the Driver file by using the following command on terminal: $logcat | grep EventHub You will find all the input devices (Including your touch driver) in the prints.

Go to that file and add the print command in interrupt handler.