Re: [PATCH v5] i2c: virtio: add a virtio i2c frontend driver
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: 2021-03-02 08:12:08
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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