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i2c: virtio: add a virtio i2c frontend driver

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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.

The device specification can be found on
https://lists.oasis-open.org/archives/virtio-comment/202101/msg00008.html.

By following the specification, people may implement different
backend drivers to emulate different controllers according to
their needs.

Co-developed-by: Conghui Chen <conghui.chen@intel.com>
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Signed-off-by: Jie Deng <jie.deng@intel.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Jie Deng
2021-07-23 13:44:35 +08:00
committed by Wolfram Sang
parent f9b459c2ba
commit 3cfc883804
6 changed files with 353 additions and 0 deletions
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1
include/uapi/linux/virtio_ids.h
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@@ -55,6 +55,7 @@
#define VIRTIO_ID_FS 26 /* virtio filesystem */
#define VIRTIO_ID_PMEM 27 /* virtio pmem */
#define VIRTIO_ID_MAC80211_HWSIM 29 /* virtio mac80211-hwsim */
#define VIRTIO_ID_I2C_ADAPTER 34 /* virtio i2c adapter */
#define VIRTIO_ID_BT 40 /* virtio bluetooth */
/*