Re: [PATCH v3 0/3] i2c: at91: slave mode support

From: Ludovic Desroches
Date: Mon Jul 30 2018 - 03:15:52 EST

On Sat, Jul 21, 2018 at 12:41:41AM +0200, Wolfram Sang wrote:
> > [Ludovic Desroches]
> > Changes in v3:
> > - rebase (cherry-pick was enough)
> Thanks for the rebase. I wonder, though, I recall to had more
> complicated issues. However...
> > - fix checkpatch errors
> > - tests:
> > - hangs with a SAMA5D4 (master and slave on different busses) after about
> > 100 transfers. It's the firs time I do this test.
> > - some mismatches with a SAMA5D4 as slave and a SAMA5D2 as master
> > I don't know if it's a regression. I don't remember having seen this
> > behavior previously.
> > I think it's worth taking those patches even if there are some possible
> > bugs. It'll allow to get more people using it and so to consolidate the
> > slave mode support.
> I really want to see those patches go upstream, too. But I am also not a
> big fan of delivering the user something with known issues. Especially
> not when they affect the main feature to be added. My rationale here is
> that someone who is able to fix the issues remaining will also be able
> to pick up and apply patches.
> Maybe, maybe if it was to be enabled by a special
> I2C_AT91_SLAVE_EXPERIMANTEL symbol with lots of explanations. I need to
> think twice about that, though.

I understand your point. The experimental mentionning could be a good
trade-off. Let me know once you make up your mind.

> Speaking of Kconfig, I think this series needs to place a
> select I2C_SLAVE
> somewhere.

Ok I'll update it if we go further with this set of patches.