From: jacmet@sunsite.dk (Peter Korsgaard)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] at91sam9g45: fix i2c bus speed
Date: Wed, 22 Sep 2010 17:18:57 +0200 [thread overview]
Message-ID: <87hbhhbyce.fsf@macbook.be.48ers.dk> (raw)
In-Reply-To: <20100922143406.GT32018@game.jcrosoft.org> (Jean-Christophe PLAGNIOL-VILLARD's message of "Wed, 22 Sep 2010 16:34:06 +0200")
>>>>> "Jean-Christophe" == Jean-Christophe PLAGNIOL-VILLARD <plagnioj@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
next prev parent reply other threads:[~2010-09-22 15:18 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-22 9:31 [PATCH] at91sam9g45: fix i2c bus speed Peter Korsgaard
2010-09-22 10:48 ` Jean-Christophe PLAGNIOL-VILLARD
2010-09-22 11:08 ` Peter Korsgaard
2010-09-22 14:34 ` Jean-Christophe PLAGNIOL-VILLARD
2010-09-22 14:54 ` Wolfgang Wegner
2010-09-22 16:09 ` Jean-Christophe PLAGNIOL-VILLARD
2010-09-22 15:18 ` Peter Korsgaard [this message]
2010-09-22 16:05 ` Nicolas Ferre
2010-09-22 16:10 ` Jean-Christophe PLAGNIOL-VILLARD
2010-09-22 16:06 ` Nicolas Ferre
2010-09-23 8:18 ` Nicolas Ferre
2010-09-23 9:22 ` Peter Korsgaard
2010-09-23 9:31 ` Russell King - ARM Linux
2010-09-23 10:09 ` Jean-Christophe PLAGNIOL-VILLARD
2010-09-23 10:24 ` Peter Korsgaard
2010-09-23 10:21 ` Peter Korsgaard
2010-09-23 10:36 ` Russell King - ARM Linux
2010-09-23 10:54 ` Peter Korsgaard
2010-09-23 11:16 ` Jean-Christophe PLAGNIOL-VILLARD
2010-09-23 11:32 ` Peter Korsgaard
2010-09-23 12:00 ` Jean-Christophe PLAGNIOL-VILLARD
2010-09-23 11:07 ` Jean-Christophe PLAGNIOL-VILLARD
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