rpmsg: glink: Expose rpmsg name attr for glink

Expose the name field as an attr so clients listening to uevents for
rpmsg can identify the edge the events correspond to.

Signed-off-by: Chris Lew <clew@codeaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>
Link: https://lore.kernel.org/r/1593017121-7953-5-git-send-email-deesin@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 3a7f87c..0e8a28c 100644 (file)
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1574,6 +1574,26 @@ static void qcom_glink_cancel_rx_work(struct qcom_glink *glink)
                kfree(dcmd);
 }
 
+static ssize_t rpmsg_name_show(struct device *dev,
+                              struct device_attribute *attr, char *buf)
+{
+       int ret = 0;
+       const char *name;
+
+       ret = of_property_read_string(dev->of_node, "label", &name);
+       if (ret < 0)
+               name = dev->of_node->name;
+
+       return snprintf(buf, RPMSG_NAME_SIZE, "%s\n", name);
+}
+static DEVICE_ATTR_RO(rpmsg_name);
+
+static struct attribute *qcom_glink_attrs[] = {
+       &dev_attr_rpmsg_name.attr,
+       NULL
+};
+ATTRIBUTE_GROUPS(qcom_glink);
+
 static void qcom_glink_device_release(struct device *dev)
 {
        struct rpmsg_device *rpdev = to_rpmsg_device(dev);
@@ -1638,6 +1658,12 @@ struct qcom_glink *qcom_glink_native_probe(struct device *dev,
        idr_init(&glink->lcids);
        idr_init(&glink->rcids);
 
+       glink->dev->groups = qcom_glink_groups;
+
+       ret = device_add_groups(dev, qcom_glink_groups);
+       if (ret)
+               dev_err(dev, "failed to add groups\n");
+
        ret = of_property_read_string(dev->of_node, "label", &glink->name);
        if (ret < 0)
                glink->name = dev->of_node->name;