Default [Q] I9100G - FSA9480 process

Hi,

I'm having some screen lag issues with my I9100g. I used BetterBatteryStats and the CPU Usage option in the settings and I found that this process was running constantly and also causing a lot of wakelocks : irq/281-fsa9480. Can someone shed some light as to what this process does? The process does not run while the phone is charging, which, coincidentally is when the lag stops.

Thanks.

Edit: Seems to have stopped after I cleaned my microUSB port with a toothbrush.