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tsc2100 touch screen problem

Other Parts Discussed in Thread: TSC2100

hi,all

i connect a tsc2100 to DM355, and found some problem. using kernel 2.6.10

the 2100 driver is similar to Wince driver TI provided.

the setup val are:

tsc2100 control the touch, scan x,y,z, interrupt pin configed as data available.

 when I touch the panel, there is only once interrupt. and I found the x,y,z registers have data. after I read them out, the status flag also change to zero.

But , when I touch again, interrupt do not happen anymore, and i read the ADC Control register, found the ADC is always busy.

what's the reason?  is there something i should do after one convertion?