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RE: [Ltib] EA3250: Touchscreen not functional with 2.6.34 kernel


From: Kevin Wells
Subject: RE: [Ltib] EA3250: Touchscreen not functional with 2.6.34 kernel
Date: Mon, 9 Aug 2010 18:26:19 +0200

Hi Ame,

 

Sorry, it does seem broken. I’ll try to get a quick fix for this in the next day.

 

thanks,

Kevin

 

From: Burghardt Arne [mailto:address@hidden
Sent: Monday, August 09, 2010 5:48 AM
To: Kevin Wells
Cc: address@hidden
Subject: [Ltib] EA3250: Touchscreen not functional with 2.6.34 kernel

 

Hi Kevin,

i have attached a scope to the SPI signals of the TSC2046 touchscreen controller and got some interesting results:

1) CS, CLK & MOSI signals are ok
2) MISO has a low level of ~2.0 V ! High level is ~3.1V

That smells, if there are some output drivers connected...
Could you please check, if the signal SPI1_DATIN (GPI_25) is configured as an input ? I have already searched for the init procedure, where all GPIOs or SPI related registers are initialized, but without success.

Thanks for your help !

Best regards

  Arne


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