On 2020/11/25 17:35, Michael S. Tsirkin wrote:
On Mon, Oct 12, 2020 at 09:55:55AM +0800, Jie Deng wrote:
Add an I2C bus driver for virtio para-virtualization.
The controller can be emulated by the backend driver in
any device model software by following the virtio protocol.
This driver communicates with the backend driver through a
virtio I2C message structure which includes following parts:
- Header: i2c_msg addr, flags, len.
- Data buffer: the pointer to the I2C msg data.
- Status: the processing result from the backend.
People may implement different backend drivers to emulate
different controllers according to their needs. A backend
example can be found in the device model of the open source
project ACRN. For more information, please refer to
https://projectacrn.org.
The virtio device ID 34 is used for this I2C adpter since IDs
before 34 have been reserved by other virtio devices.
Co-developed-by: Conghui Chen <conghui.chen@xxxxxxxxx>
Signed-off-by: Conghui Chen <conghui.chen@xxxxxxxxx>
Signed-off-by: Jie Deng <jie.deng@xxxxxxxxx>
Reviewed-by: Shuo Liu <shuo.a.liu@xxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
I assume this will be updated once the specification is acked
by the virtio tc. Holding off on this one for now since
we know there will be host/guest ABI changes.
Yeah. I will update this driver once the specification is acked by the
virtio tc.
Thanks.
