1 // SPDX-License-Identifier: GPL-2.0-or-later
6  * https://raw.githubusercontent.com/oasis-tcs/virtio-spec/master/virtio-i2c.tex
23  * struct virtio_i2c - virtio I2C data
35  * struct virtio_i2c_req - the virtio I2C request structure
54 		complete(&req->completion);  in virtio_i2c_msg_done()
70 		 * Only 7-bit mode supported for this moment. For the address  in virtio_i2c_prepare_reqs()
78 		if (i != num - 1)  in virtio_i2c_prepare_reqs()
119 		wait_for_completion(&req->completion);  in virtio_i2c_complete_reqs()
121 		if (!failed && req->in_hdr.status != VIRTIO_I2C_MSG_OK)  in virtio_i2c_complete_reqs()
137 	struct virtqueue *vq = vi->vq;  in virtio_i2c_xfer()
143 		return -ENOMEM;  in virtio_i2c_xfer()
169 	vdev->config->del_vqs(vdev);  in virtio_i2c_del_vqs()
174 	struct virtio_device *vdev = vi->vdev;  in virtio_i2c_setup_vqs()
176 	vi->vq = virtio_find_single_vq(vdev, virtio_i2c_msg_done, "msg");  in virtio_i2c_setup_vqs()
177 	return PTR_ERR_OR_ZERO(vi->vq);  in virtio_i2c_setup_vqs()
196 		dev_err(&vdev->dev, "Zero-length request feature is mandatory\n");  in virtio_i2c_probe()
197 		return -EINVAL;  in virtio_i2c_probe()
200 	vi = devm_kzalloc(&vdev->dev, sizeof(*vi), GFP_KERNEL);  in virtio_i2c_probe()
202 		return -ENOMEM;  in virtio_i2c_probe()
204 	vdev->priv = vi;  in virtio_i2c_probe()
205 	vi->vdev = vdev;  in virtio_i2c_probe()
211 	vi->adap.owner = THIS_MODULE;  in virtio_i2c_probe()
212 	snprintf(vi->adap.name, sizeof(vi->adap.name),  in virtio_i2c_probe()
213 		 "i2c_virtio at virtio bus %d", vdev->index);  in virtio_i2c_probe()
214 	vi->adap.algo = &virtio_algorithm;  in virtio_i2c_probe()
215 	vi->adap.dev.parent = &vdev->dev;  in virtio_i2c_probe()
216 	vi->adap.dev.of_node = vdev->dev.of_node;  in virtio_i2c_probe()
217 	i2c_set_adapdata(&vi->adap, vi);  in virtio_i2c_probe()
223 	ACPI_COMPANION_SET(&vi->adap.dev, ACPI_COMPANION(vdev->dev.parent));  in virtio_i2c_probe()
225 	ret = i2c_add_adapter(&vi->adap);  in virtio_i2c_probe()
234 	struct virtio_i2c *vi = vdev->priv;  in virtio_i2c_remove()
236 	i2c_del_adapter(&vi->adap);  in virtio_i2c_remove()
254 	return virtio_i2c_setup_vqs(vdev->priv);  in virtio_i2c_restore()