linux-kernel - Re: [PATCH] [v2] i3c, iio: fix i3c driver dependencies

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Message-ID: <20260204162604f55a84b5@mail.local>
Date: Wed, 4 Feb 2026 17:26:04 +0100
From: Alexandre Belloni <alexandre.belloni@...tlin.com>
To: Jonathan Cameron <jic23@...nel.org>
Cc: Guenter Roeck <linux@...ck-us.net>, Arnd Bergmann <arnd@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andy Shevchenko <andriy.shevchenko@...el.com>,
	Frank Li <Frank.Li@....com>,
	Adrian Fluturel <fluturel.adrian@...il.com>,
	Carlos Song <carlos.song@....com>,
	David Lechner <dlechner@...libre.com>,
	Nuno Sá <nuno.sa@...log.com>,
	Andy Shevchenko <andy@...nel.org>, Jean Delvare <jdelvare@...e.de>,
	linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-i3c@...ts.infradead.org, linux-iio@...r.kernel.org
Subject: Re: [PATCH] [v2] i3c, iio: fix i3c driver dependencies

On 02/02/2026 20:50:11+0000, Jonathan Cameron wrote:
> On Mon, 2 Feb 2026 09:50:58 -0800
> Guenter Roeck <linux@...ck-us.net> wrote:
> 
> > On 2/2/26 08:04, Arnd Bergmann wrote:
> > > From: Arnd Bergmann <arnd@...db.de>
> > > 
> > > All combined i2c/i3c drivers appear to suffer from the same link
> > > time problem when CONFIG_I3C is set to 'm':
> > > 
> > > arm-linux-gnueabi-ld: drivers/iio/magnetometer/mmc5633.o: in function `mmc5633_i3c_driver_init':
> > > mmc5633.c:(.init.text+0x30): undefined reference to `i3c_driver_register_with_owner'
> > > 
> > > This was previously fixed several times by marking individual
> > > drivers as 'depends on I2C; depends on I3C || !I3C', but this gets
> > > tedious and is somewhat confusing.
> > > 
> > > Add a Kconfig symbol 'I3C_OR_I2C' to help replace those dependencies,
> > > and use this in all the existing drivers that had already fixed it
> > > as well as the new mmc5633 driver.
> > > 
> > > Fixes: 6e5f6bf2e3f0 ("iio: magnetometer: Add mmc5633 sensor")
> > > Signed-off-by: Arnd Bergmann <arnd@...db.de>
> > > ---
> > > v2: restore accidentally deleted lines
> > > ---
> > >   drivers/hwmon/Kconfig            |  6 ++----  
> > 
> > For hwmon:
> > 
> > Acked-by: Guenter Roeck <linux@...ck-us.net>
> > 
> Hi Arnd / All,
> 
> I applied a less good fix and the pull request has gone to Greg for
> the IIO bug. I copied the hwmon config you have below.
> 
> So I'm absolutely in favour of this improvement but it's
> probably a case of rebase after rc1 and it goes in next cycle.
> Or maybe Greg could pick a rebased version up on top of char-misc-next?
> 
> So with it rebased,
> Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>

I guess I can pick this up after rc1.


-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com