# Re: \[PATCH v8\] i2c: virtio: add a virtio i2c frontend driver

- From: Arnd Bergmann \<arnd@arndb.de\>
- Date: 2021-03-18 14:53:45 
- List: virtualization
- Page: https://ratatoskr.run/virtualization/2021/03/6306447
- Thread: https://ratatoskr.run/linux-i2c/2021/03/6302620/t.md

```text
On Thu, Mar 18, 2021 at 3:42 PM Enrico Weigelt, metux IT consult
[ref] wrote:
>
> On 16.03.21 08:44, Viresh Kumar wrote:
>
> > FWIW, this limits this driver to support a single device ever. We
> > can't bind multiple devices to this driver now. Yeah, perhaps we will
> > never be required to do so, but who knows.
>
> Actually, I believe multiple devices really should be possible.
>
> The major benefit of virtio-i2c is either bridging certan real bus'es
> into a confined workload, or creating virtual hw testbeds w/o having to
> write a complete emulation (in this case, for dozens of different i2c
> controllers) - and having multiple i2c interfaces in one machine isn't
> exactly rare.

Allowing multiple virtio-i2c controllers in one system, and multiple i2c
devices attached to each controller is clearly something that has to work.

I don't actually see a limitation though. Viresh, what is the problem
you see for having multiple controllers?

         Arnd
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```