RE: BBB IIO ADC access not working

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Hi Michael, 

> -----Original Message-----
> From: Michael Welling [mailto:mwelling79@xxxxxxxxx] On Behalf 
> Of Michael Welling
> Sent: Tuesday, August 11, 2015 10:03 AM
> To: Greg Wilson-Lindberg
> Cc: Michael Welling; Daniel Baluta; linux-iio@xxxxxxxxxxxxxxx
> Subject: Re: BBB IIO ADC access not working
> 
> On Tue, Aug 11, 2015 at 09:00:21AM -0700, Greg Wilson-Lindberg wrote:
> > Hello Michael,
> > 
> > .....
> > > Try increasing the charge-delay and see if you can find a value 
> > > where it stops happening.
> > > 
> > > Something tells me that it won't fix the issue.
> > > 
> > > Where is the source tree for this kernel?
> > > Which dtb are you using?
> > >  
> > 
> > I increased the charge-delay to 0x10000 and left the system 
> over night 
> > with no user interaction and it was locked up this morning, I think 
> > I'm going to have to agree that changing that to a larger 
> number will not fix the problem.
> > 
> > Here is a link to the dts that we use:
> > http://pastebin.com/5nU27sML
> > I did not include the standard dtsi files that we include from the 
> > linux source tree, just the files that we built ourselves 
> or that we modified.
> 
> I do not see the modification that you made to the 
> touchscreen registration.

We haven't modified the touch screen registration, we use xinput_calibrator for the calibration.
> 
> Guessing you modified this file for the charge-delay:
> https://github.com/beagleboard/linux/blob/3.14.40-ti-r62/arch/
> arm/boot/dts/am335x-bone-ti-tscadc-4-wire.dtsi

And you are correct, I forgot that I had added the charge-delay parameter to the 
am335x-bone-ti-tscadc-4-wire.dtsi file, sorry.

> 
> > 
> > RCN replied thusly to my request for the source tree:
> >    Here's the kernel source, the config we use is "bb.org_defconfig"
> >    https://github.com/beagleboard/linux/tree/3.14.40-ti-r62
> > 
> > Thanks for your help in tracking down this problem.
> 
> I will compare the drivers in this kernel to the latest work 
> in the mainline.
> 
> > 
> > Regards,
> > Greg
> --
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