Re: [PATCH v5] i2c: virtio: add a virtio i2c frontend driver

Viresh Kumar
2021-03-02T08:12:08Z

On 02-03-21, 10:21, Jie Deng wrote:
> On 2021/3/1 19:54, Viresh Kumar wrote:
> That's my original proposal. I used to mirror this interface with "struct
> i2c_msg".
>
> But the design philosophy of virtio TC is that VIRTIO devices are not
> specific to Linux
> so the specs design should avoid the limitations of the current Linux driver
> behavior.

Right, I understand that.

> We had some discussion about this. You may check these links to learn the
> story.
> https://lists.oasis-open.org/archives/virtio-comment/202010/msg00016.html
> https://lists.oasis-open.org/archives/virtio-comment/202010/msg00033.html
> https://lists.oasis-open.org/archives/virtio-comment/202011/msg00025.html

So the thing is that we want to support full duplex mode, right ?

How will that work protocol wise ? I mean how would we know if we are
expecting both tx and rx buffers in a transfer ?

--
viresh