[PATCH V6 4/5] rpmsg: glink: Expose rpmsg name attr for glink

Arun Kumar Neelakantam
2020-05-20T09:40:13Z

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>
---
drivers/rpmsg/qcom_glink_native.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index b85433c..2b5368b 100644
--- 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;
--
2.7.4