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TSC2007: PENIRQ signal is generated interrupt signal all the time

Part Number: TSC2007
Other Parts Discussed in Thread: AM3352

HW use AM3352 + TSC2007, and operate with http://www.ti.com/lit/an/slaa359/slaa359.pdf

Driver use this link: 

But has a issue that PENIRQ signal is generated  interrupt signal  all the time.  AM3352 Frequently interrupted.  and PENIRQ signal is low when keep touch.

how to config TSC2007. Can give some advice?