On Wed, Jun 30, 2021 at 10:09 AM Andy Shevchenko
[off-list ref] wrote:

On Wed, Jun 30, 2021 at 09:55:49AM +0200, Arnd Bergmann wrote:

quoted

On Wed, Jun 30, 2021 at 9:51 AM Jie Deng [off-list ref] wrote:

...

quoted

On a related note, we are apparently still missing the bit in the virtio bus
layer that fills in the dev->of_node pointer of the virtio device. Without
this, it is not actually possible to automatically probe i2c devices connected
to a virtio-i2c bus. The same problem came up again with the virtio-gpio
driver that suffers from the same issue.

Don't we need to take care about fwnode handle as well?

I'm fairly sure this gets set up automatically on DT based systems, based
on the dev->of_node of the virtio device, with no changes to the i2c
core core.

If you want to automatically probe i2c devices on a virtio-i2c controller
with ACPI, I have no idea if that would require changes to both
i2c-core-acpi.c as well as the virtio core, or just one of them.
So far, my assumption was that this would not be needed with ACPI.

        Arnd