linux-kernel - Re: [PATCH v2 3/6] i2c: designware: Combine some of the common functions

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Message-ID: <aW41NnasQws6bNSY@smile.fi.intel.com>
Date: Mon, 19 Jan 2026 15:44:22 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc: Andi Shyti <andi.shyti@...nel.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Jan Dabros <jsd@...ihalf.com>, Raag Jadav <raag.jadav@...el.com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/6] i2c: designware: Combine some of the common
 functions

On Mon, Jan 19, 2026 at 03:18:34PM +0200, Heikki Krogerus wrote:
> Tue, Dec 30, 2025 at 04:14:32PM +0200, Heikki Krogerus kirjoitti:

...

> > > > -	snprintf(adap->name, sizeof(adap->name),
> > > > -		 "Synopsys DesignWare I2C Slave adapter");
> > > 
> > > This patch changes the user visible strings (via `i2cdetect`) or module names
> > > in case we want to find it by name (note, we already have such precedents for
> > > other adapters). Currently we have three variants if I not miss anything:
> > > Generic for master (as in this change), Generic for slave, and AMD platform
> > > driver case. If you think this is okay change, then just drop the AMD case
> > > as well, and hence remove the no more needed conditional. Otherwise I would
> > > somehow group this naming in one place, if possible.
> > 
> > The only thing that this will change is, it removes the common
> > slave/target only description, because after this that setup is no
> > longer possible - master mode is now always supported. So this is the
> > correct thing to do.
> > 
> > I don't think the user space should ever rely on a description like
> > this except possibly with some customised/non-common systems that the
> > user space really has to handle in some specific way, but if something
> > really did rely on this common "target only" description, it could
> > have only used it to determine that it basically can't use the device
> > for anything as it's slave/target only - so basically to use it to
> > check the functionality (same as i2cdetect -F). But as said, this is
> > no longer a problem.
> > 
> > As for the AMD case, if I understood what you are proposing, I
> > disagree with you. The glue drivers should always be allowed to assign
> > the name (these would be the "non-common" systems that the user space
> > may actually need to know about). I'm also against grouping the
> > naming. The glue drivers must handle the platform specifics including
> > the naming if needed, not the core.
> 
> Ping.

Do you need my input on this? If you think this is good change, make sure the
summary of the above goes to the commit message.

-- 
With Best Regards,
Andy Shevchenko