@@ -983,6 +983,20 @@ static int qcom_smd_create_device(struct qcom_smd_channel *channel)
return rpmsg_register_device(rpdev);
}
+static int qcom_smd_create_chrdev(struct qcom_smd_edge *edge)
+{
+ struct qcom_smd_device *qsdev;
+
+ qsdev = kzalloc(sizeof(*qsdev), GFP_KERNEL);
+ if (!qsdev)
+ return -ENOMEM;
+
+ qsdev->edge = edge;
+ qsdev->rpdev.ops = &qcom_smd_device_ops;
+ qsdev->rpdev.dev.parent = &edge->dev;
+ return rpmsg_chrdev_register_device(&qsdev->rpdev);
+}
+
/*
* Allocate the qcom_smd_channel object for a newly found smd channel,
* retrieving and validating the smem items involved.
@@ -1284,6 +1298,21 @@ static void qcom_smd_edge_release(struct device *dev)
kfree(edge);
}
+static ssize_t rpmsg_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct qcom_smd_edge *edge = to_smd_edge(dev);
+
+ return sprintf(buf, "%s\n", edge->of_node->name);
+}
+static DEVICE_ATTR_RO(rpmsg_name);
+
+static struct attribute *qcom_smd_edge_attrs[] = {
+ &dev_attr_rpmsg_name.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(qcom_smd_edge);
+
/**
* qcom_smd_register_edge() - register an edge based on an device_node
* @parent: parent device for the edge
@@ -1305,6 +1334,7 @@ struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent,
edge->dev.parent = parent;
edge->dev.release = qcom_smd_edge_release;
+ edge->dev.groups = qcom_smd_edge_groups;
dev_set_name(&edge->dev, "%s:%s", dev_name(parent), node->name);
ret = device_register(&edge->dev);
if (ret) {
@@ -1318,6 +1348,12 @@ struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent,
goto unregister_dev;
}
+ ret = qcom_smd_create_chrdev(edge);
+ if (ret) {
+ dev_err(&edge->dev, "failed to register chrdev for edge\n");
+ goto unregister_dev;
+ }
+
schedule_work(&edge->scan_work);
return edge;
Create and register a rpmsg device for use with the rpmsg user space interface, allowing user space to access SMD channels. Also provide the "rpmsg_name" device attribute to expose the edge name in sysfs, allowing the user to write udev rules for specific rpmsg devices and their children. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> --- drivers/rpmsg/qcom_smd.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+)