drivers/w1/slaves/w1_bq27000.c

[Mike Westerhof]

Lars-Peter Clausen wrote:
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> Michael Trimarchi wrote:
>   
>> Lars-Peter Clausen wrote: Michael Trimarchi wrote:
>>
>>     
>>>>> Lars-Peter Clausen wrote: Michael Trimarchi wrote:
>>>>>
>>>>>
>>>>>           
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> instead using the FIQ part we can try to use the
>>>>>>>> w1_bq27000 one wire protocol for 2.6.3x.
>>>>>>>>
>>>>>>>> What do you think about?
>>>>>>>>
>>>>>>>> Michael
>>>>>>>>
>>>>>>>>
>>>>>>>>                 
>>>>> Well, we still need a one wire master. Which would probably
>>>>> be FIQ based.
>>>>>
>>>>>
>>>>>           
>>>>>> The gpio based is not ok or it's too slow? Michel
>>>>>>
>>>>>>             
>>>>> - Lars
>>>>>
>>>>>           
>> One wire is similar, but different from hdq, so one would at least
>> need an hdq gpio driver.
>>
>>     
>>> But is ok to try to use some that does't use FIQ, so somenthing
>>> like a gpio bitbang master?
>>>       
> Sure. I would be happy if we could do it without using FIQ.
>   
I expect everyone would - so it worries me a bit that the original 
implementation was not done with simple gpio bitbanging.  It might not 
be a bad idea to ping Andy to understand why he didn't choose the 
one-wire.  Perhaps the timing still requires the FIQ anyway, or perhaps 
there's some other limitation of which we are unaware.
-Mike (mwester)