RPMSG provides a char device interface to userspace. Probe the rpmsg
chrdev channel to enable the rpmsg_ctrl device creation on glink
transports.
Signed-off-by: Chris Lew <clew@xxxxxxxxxxxxxx>
---
drivers/rpmsg/qcom_glink_native.c | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 179132226dc2..786f2eca01f1 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -132,6 +132,13 @@ enum {
GLINK_STATE_CLOSING,
};
+struct qcom_glink_device {
+ struct rpmsg_device rpdev;
+ struct qcom_glink *glink;
+};
+
+#define to_glink_device(_x) container_of(_x, struct qcom_glink_device, rpdev)
+
/**
* struct glink_channel - internal representation of a channel
* @rpdev: rpdev reference, only used for primary endpoints
@@ -1339,6 +1346,10 @@ static struct device_node *qcom_glink_match_channel(struct device_node *node,
return NULL;
}
+static const struct rpmsg_device_ops glink_chrdev_ops = {
+ .create_ept = qcom_glink_create_ept,
+};
+
static const struct rpmsg_device_ops glink_device_ops = {
.create_ept = qcom_glink_create_ept,
.announce_create = qcom_glink_announce_create,
@@ -1547,6 +1558,30 @@ static void qcom_glink_work(struct work_struct *work)
}
}
+static void qcom_glink_device_release(struct device *dev)
+{
+ struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+ struct qcom_glink_device *gdev = to_glink_device(rpdev);
+
+ kfree(gdev);
+}
+
+static int qcom_glink_create_chrdev(struct qcom_glink *glink)
+{
+ struct qcom_glink_device *gdev;
+
+ gdev = kzalloc(sizeof(*gdev), GFP_KERNEL);
+ if (!gdev)
+ return -ENOMEM;
+
+ gdev->glink = glink;
+ gdev->rpdev.ops = &glink_chrdev_ops;
+ gdev->rpdev.dev.parent = glink->dev;
+ gdev->rpdev.dev.release = qcom_glink_device_release;
+
+ return rpmsg_chrdev_register_device(&gdev->rpdev);
+}
+
struct qcom_glink *qcom_glink_native_probe(struct device *dev,
unsigned long features,
struct qcom_glink_pipe *rx,
@@ -1605,6 +1640,10 @@ struct qcom_glink *qcom_glink_native_probe(struct device *dev,
if (ret)
return ERR_PTR(ret);
+ ret = qcom_glink_create_chrdev(glink);
+ if (ret)
+ dev_err(glink->dev, "failed to register chrdev\n");
+
return glink;
}
EXPORT_SYMBOL_GPL(qcom_glink_native_probe);
--
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