The patch submitted appears specific to the dm355. The changes are very similar to the 2.6.10 kernel from mv. If the correct gpio's and pinmux are disabled/enabled it should work for the dm644x.
I took the patch from Philby and tried it on our dm6443 platform (on a 2.6.28 kernel) and it appears to work for the problem we have when the i2c appears to lock up. Craig On Wednesday 22 July 2009 5:14:35 am Philby John wrote: > On Wed, 2009-07-22 at 04:03 -0700, Nitin Mahajan wrote: > > Hello, > > > > ----- Original Message ---- > > > > > From: Philby John <pj...@in.mvista.com> > > > To: linux-...@vger.kernel.org > > > Cc: kh...@linux-fr.org; davinci-linux-open-source@linux.davincidsp.com > > > Sent: Wednesday, July 15, 2009 13:04:27 > > > Subject: [PATCH/RFC 1/1] recover from davinci i2c time out conditions > > > > > > >From dbe7e824d576636bb15b82a20fd2557fddc9a8f7 Mon Sep 17 00:00:00 2001 > > > > > > From: Philby John > > > Date: Tue, 14 Jul 2009 21:46:47 +0530 > > > Subject: [PATCH] Reset i2c bus to come out of time out conditions > > > > > > Get out of i2c time out condition by resetting > > > the i2c bus. The kernel must be robust enough to > > > gracefully recover from i2c bus failure without having > > > to reset the machine. This is done by first NACKing the slave > > > and then resetting the i2c bus after a certain timeout. > > > > > > Signed-off-by: Philby John > > > > I tried this on DM6443 based board with 2.6.18 kernel. The result I am > > posting below. It gives controller time out again and again. > > > > dhcppc9 login: i2c_davinci i2c_davinci.1: controller timed out > > i2c_davinci i2c_davinci.1: initiating i2c bus recovery > > i2c_davinci i2c_davinci.1: controller timed out > > i2c_davinci i2c_davinci.1: initiating i2c bus recovery > > There is something gravely wrong about this patch and I would submit a > fix shortly incorporating the review comments. But please be aware that > I do not guarantee a definitive time line for a fix cause I have much at > hand at the moment. > > > Regards, > Philby > > > _______________________________________________ > Davinci-linux-open-source mailing list > Davinci-linux-open-source@linux.davincidsp.com > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source -- Craig Matsuura - Principal Engineer Control4 11734 South Election Road - Suite 200 Salt Lake City, UT 84020-6432 PH: 801-523-3161 FX: 801-523-3199
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