On Tue, Nov 17, 2015 at 1:04 PM, Lars-Peter Clausen <l...@metafoo.de> wrote: > On 11/17/2015 06:17 AM, Shubhrajyoti Datta wrote: >> On Mon, Nov 16, 2015 at 7:12 PM, Lars-Peter Clausen <l...@metafoo.de> wrote: >>> Commit d701667bb331 ("i2c: xiic: Do not reset controller before every >>> transfer") removed the reinitialization of the controller before the start >>> of each transfer. Apparently this change is not safe to make and the commit >>> results in random I2C bus failures. >> >> Which is the platform and the ip version that you saw the issue. >> Did you see the issue with read and write as well? > > The IP version is the axi-iic v2.0 Revision 8. I've tested this on a few > platforms, custom ones and standard ones and I could reproduce it on most. > One of them was on the ZED board. The one where I couldn't reproduce it was > the ZC706. But that doesn't necessarily mean it doesn't happen there, just > that it is not triggered by the testcase. All the boards having the same version of the ip is what I have understood.
Thanks for the info I will try to reproduce the issue. > > The problem is that it is random corruption, Of registers? > so some I2C devices might start > to behave strangely at some point. The only good more or less reliable way > to reproduce it that I found was to run i2cdetect a couple of times and at > least one of them will produce strange behavior. > I will try to reproduce the issue at my end thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html