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

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Date:   Fri, 21 Dec 2018 17:16:51 +0100
From:   Ludovic Desroches <ludovic.desroches@...rochip.com>
To:     Wolfram Sang <wsa@...-dreams.de>
CC:     <linux-i2c@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <me@....yt>,
        <nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 0/3] i2c: at91: slave mode support

Hi Wolfram,

On Tue, Dec 11, 2018 at 08:28:05PM +0100, Wolfram Sang wrote:
> Hi Ludovic,
> 
> > > >  - 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.
> 
> Ok, I give in. If you:
> 
> * add 'select I2C_SLAVE'
> * make slave support selectable by I2C_AT91_SLAVE_STAGING or
>   _EXPERIMENTAL or something alike (default n)
> * and add to the help text of that symbol the above known issues
>   and 'not for production' and 'help wanted' and where to get more
>   info and all that
> 
> then I'll apply this series soonish. Promised!

Ok I will handle these requests and resend it.

Thanks

Ludovic