On Thu, 15 Oct 2009 08:26:15 +1100, Benjamin Herrenschmidt wrote:

On Wed, 2009-10-14 at 23:02 +0200, Jean Delvare wrote:

quoted

Hi all,

On Tue, 13 Oct 2009 11:49:48 +0200, Jean Delvare wrote:

quoted

I2C bus being setup too fast sounds more likely. It might be worth
adding an arbitrary delay after initialization, just to see if it
helps. Not sure where though, as I'm not familiar with the Powermac
initialization steps. Maybe right before i2c_add_adapter() in
i2c_powermac_probe?

Tim, can you please give a try to this patch? Obviously your machine
will take 5 additional seconds to boot, and this isn't meant as a real
fix, but if it helps, this will be an interesting hint for further
debugging attempts.

Oh, I was actually thinking about the frequency of the I2C clock :-)

Oh. Well, if that was the case, we would see errors all the time, not
just during initialization, right? Or does the I2C clock frequency
change over time somehow?

-- 
Jean Delvare