[PATCH] at91sam9g45: fix i2c bus speed

Peter Korsgaard jacmet at sunsite.dk
Wed Sep 22 11:18:57 EDT 2010


>>>>> "Jean-Christophe" == Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> writes:

Hi,

 >> You don't expect most 9g45 users will run at 400MHz? It seems pretty
 >> likely to me. In any case, a safe (but somewhat slow) default seems
 >> better than a potentially unsafe one.
 >> 
 >> Now, I agree that it would be nice to add an interface to tweak this
 >> delay if needed (extra argument to at91_add_device_i2c()?), but that's
 >> next to the discussion about what the default should be.

 Jean-Christophe> I'd prefer to calculate it

 Jean-Christophe> so we specify which max freq we want in my mind it
 Jean-Christophe> will be good to be as in spi to specific per device
 Jean-Christophe> it's max speed so we can adapt the bus freq

Yes, that sounds like a nice long term idea, but let's fix the immediate
problem in the mean time, right?

-- 
Bye, Peter Korsgaard



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