On 10/27/2015 02:11 PM, Nicola Corna wrote:

As reported here
http://www.advamation.com/knowhow/raspberrypi/rpi-i2c-bug.html
the BCM2835 has a bug in its i2c implementation which prevents a correct
clock stretching.

I was going to ask for some more official confirmation of this bug (e.g.
update to BCM2835_Peripherals.pdf), but it looks like it's already been
confirmed; check Gert van Loo's responses at:

https://www.raspberrypi.org/forums/viewtopic.php?p=146272

It might be useful to add this link into the patch description.