Re: Touchscreen chip is not an ADS 7846

Hi Paul,

Paul Sokolovsky a écrit :
> Hello Pierre,
>
> Sunday, January 28, 2007, 9:54:14 PM, you wrote:
>
>
>> Hi,
>>
>> the touchscreen is now working (probably for X50 and for sure for X51).
>> I will post a first patch soon.
>> I still have to define the coordinates transformation.
>>
>> Paul : I see you committed a new 7846 device-independent driver. Should
>> I use this one from now ?
>>
>
> Yes, I refactored it exactly for your use, and I'd appreciate if you
> give it try (and win ;-) ). Please see h4000 code fro how to use it
> (pretty simple actually, you just need to pass in pen down IRQ).
>
> I also confirmed that ADS7846 and TSC2046 are exact clones. Quoting
> doc:
> "The TSC2046 is 100% pin-compatible with the existing
> ADS7846, and will drop into the same socket."
> They talk about pin compatibility here, but looking at command bits,
> programmatical interface is the same too. So, this is great news,
> meaning that the whole dozen of PDAs can use the same driver. I will
> try ads7846ts_ssp on hx4700 as the next thing to do too.
>
ok : go for it, then :-)
Just a question : do you have any idea of the transfer laws to be used ?
I get some really non-linear measurements...

>
>> Could you please commit the following modification to
>> include/asm-arm/arch-pxa/memory.h ?
>>
>> #ifdef CONFIG_DRAM_BASE
>> #define PHYS_OFFSET (CONFIG_DRAM_BASE)
>> #else
>> #define PHYS_OFFSET UL(0xa0000000)
>> #endif
>>
>
> Committed. So, can you confirm that with this modification CVS can
> build bootable kernel for aximx50? It's time to tag next subrelease,
> and I'd like to include working aximx50 into it.
>
It is ok. The HEAD kernel boots and the pxafb is working on my X51v.
Tests should be done also on X50, X50v and X51...

Jean-Nicolas : could you build and host this kernel image ?

Pierre
Received on Mon Jan 29 2007 - 14:26:12 EST