[Soekris] Linux access to the 4526's GPIO

[Joshua ChaitinPollak]

On Oct 11, 2005, at 11:54 AM, Stanislav Meduna wrote:

> Joshua ChaitinPollak wrote:
>
>
>>> http://www.meduna.org/sw_gpio_en.html
>>>
>>
>>
>> These are drivers for the 4801. That doesn't have the same GPIO  
>> as  the
>> 4501, does it? The GPIO on the 4501 is built into the Elan chip I   
>> thought.
>>
>
> I think that the driver has code to handle both, but I only own
> a 4801 so I can't say whether it actually works for 4501.
> In the case you are going to try it, please let me know
> the result.
>
> Regards
> -- 
>                                         Stano

Stanislav, I'm using the 2.4.30 kernel, so I used the older driver  
here http://soekris.hejl.de/, but when I get around to moving to  
2.6.x, I'll let you know the status of your driver. Anyway, the  
driver seems to work ok. At least, I can control the error light with  
it.

But I'm having trouble figuring out the deal with the GPIO pins. The  
documentation for the 4501 doesn't match the 4526 (which is the board  
I have). The 4501 has a 14 pin header at JP3, but the 4526 only has  
an 8 pin connector. When I touch a volt meter to the two pins  
farthest from the LEDs, the board resets. Obviously not good.

Does someone know the pin outs for the 4526's GPIO?


-- 
Joshua ChaitinPollak
Software Engineer
Kiva Systems