Re: [PATCH v2 01/12] i2c: allow setting the parent device and OF node through the adapter struct

[Bartosz Golaszewski]

On Mon, Mar 2, 2026 at 4:11 PM Andreas Kemnade <andreas@xxxxxxxxxxxx> wrote:
>
> On Mon, 2 Mar 2026 12:38:27 +0200
> Kalle Niemi <kaleposti@xxxxxxxxx> wrote:
>
> > On 3/2/26 10:55, Bartosz Golaszewski wrote:
> > > On Mon, Mar 2, 2026 at 8:47 AM Kalle Niemi <kaleposti@xxxxxxxxx> wrote:
> > >> On 2/23/26 11:05, Bartosz Golaszewski wrote:
> > >>> In order to stop i2c bus drivers from dereferencing the struct device
> > >>> embedded in struct i2c_adapter, let's allow configuring the parent
> > >>> device and OF-node of the adapter directly through dedicated fields.
> > >>> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>
> > >>> ---
> > >> Hello,
> > >> Automated driver test system bisected this commit to be the first bad
> > >> commit, linux-next next-20260227 was tested. Failed tests include driver
> > >> tests for ROHM PMIC and accelerometers, which are connected to
> > >> BeagleBone Black.
> > >> The failed driver tests all fail to first i2cget and the tests stop
> > >> there: "Could not open file '/dev/i2c-2' or 'dev/i2c/2': No such file or
> > >> directory".
> > > Wolfram: well, now it would actually be useful to know which commit
> > > exactly is the culprit so maybe splitting the changes is not a bad
> > > idea after all.
> > > Kalle: which i2c bus driver fails here? Any errors in kernel log?
> > > Bart
> >
> > Hello Bart,
> >
> > i2c-1 and i2c-2 are failing. I am not seeing any i2c errors in kernel log. I got two failures without the dmesg available (this is bugged test sequence, and not a kernel crash), but those got the same stdout message "Could not open file ...." as all others.
> >
> Probably I am using the same host driver
>
> tested on OMAP3 DM3730, result: i2c drivers get bound to their devices,
> no obvious trouble. But controllers are registered with high indexes.
>
> localhost:~# i2cdetect -l
> i2c-3   i2c             OMAP I2C adapter                        I2C adapter
> i2c-4   i2c             OMAP I2C adapter                        I2C adapter
> i2c-5   i2c             OMAP I2C adapter                        I2C adapter
> localhost:~# uname -a
> Linux localhost 7.0.0-rc1-next-20260227 #27 SMP Mon Mar  2 11:56:27 CET 2026 armv7l Linux
>
> Regards,
> Andreas

Hi! Does the change I posted earlier in this thread help?

Bart