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rpmsg: Support drivers without primary endpoint 

Some types of rpmsg drivers does not have a primary endpoint to tie
their existence upon, but wishes to create and destroy endpoints
dynamically, e.g. based on user interactions.

Allow rpmsg drivers to omit a driver callback to signal this case and
make the probe path not create a primary endpoint in this case.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Bjorn Andersson 2016-10-07 21:23:13 -07:00
parent e950604782
commit bbd188092e
1 changed files with 18 additions and 14 deletions
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32
drivers/rpmsg/rpmsg_core.c
View File

@ -347,27 +347,30 @@ static int rpmsg_dev_probe(struct device *dev)
struct rpmsg_device *rpdev = to_rpmsg_device(dev);
struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver);
struct rpmsg_channel_info chinfo = {};
struct rpmsg_endpoint *ept;
struct rpmsg_endpoint *ept = NULL;
int err;
strncpy(chinfo.name, rpdev->id.name, RPMSG_NAME_SIZE);
chinfo.src = rpdev->src;
chinfo.dst = RPMSG_ADDR_ANY;
if (rpdrv->callback) {
strncpy(chinfo.name, rpdev->id.name, RPMSG_NAME_SIZE);
chinfo.src = rpdev->src;
chinfo.dst = RPMSG_ADDR_ANY;
ept = rpmsg_create_ept(rpdev, rpdrv->callback, NULL, chinfo);
if (!ept) {
dev_err(dev, "failed to create endpoint\n");
err = -ENOMEM;
goto out;
ept = rpmsg_create_ept(rpdev, rpdrv->callback, NULL, chinfo);
if (!ept) {
dev_err(dev, "failed to create endpoint\n");
err = -ENOMEM;
goto out;
}
rpdev->ept = ept;
rpdev->src = ept->addr;
}
rpdev->ept = ept;
rpdev->src = ept->addr;
err = rpdrv->probe(rpdev);
if (err) {
dev_err(dev, "%s: failed: %d\n", __func__, err);
rpmsg_destroy_ept(ept);
if (ept)
rpmsg_destroy_ept(ept);
goto out;
}
@ -388,7 +391,8 @@ static int rpmsg_dev_remove(struct device *dev)
rpdrv->remove(rpdev);
rpmsg_destroy_ept(rpdev->ept);
if (rpdev->ept)
rpmsg_destroy_ept(rpdev->ept);
return err;
}