linux-kernel - [PATCH v2 6/6] rpmsg: glink: Expose rpmsg name attr for glink

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Date:   Wed, 25 Apr 2018 19:07:52 -0700
From:   Chris Lew <clew@...eaurora.org>
To:     bjorn.andersson@...aro.org, andy.gross@...aro.org,
        david.brown@...aro.org, robh+dt@...nel.org, mark.rutland@....com
Cc:     aneela@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-remoteproc@...r.kernel.org, linux-soc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        clew@...eaurora.org
Subject: [PATCH v2 6/6] 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@...eaurora.org>
---

Changes since v1:
- Add const to attribute struct
- Get name from glink channel

 drivers/rpmsg/qcom_glink_native.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 1418926f6110..72240614d4ca 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1552,6 +1552,22 @@ static void qcom_glink_work(struct work_struct *work)
 	}
 }
 
+static ssize_t rpmsg_name_show(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+	struct glink_channel *channel = to_glink_channel(rpdev->ept);
+
+	return snprintf(buf, RPMSG_NAME_SIZE, "%s\n", channel->glink->name);
+}
+static DEVICE_ATTR_RO(rpmsg_name);
+
+static const 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);
@@ -1601,6 +1617,8 @@ struct qcom_glink *qcom_glink_native_probe(struct device *dev,
 		return ERR_PTR(-ENOMEM);
 
 	glink->dev = dev;
+	glink->dev->groups = qcom_glink_groups;
+
 	glink->tx_pipe = tx;
 	glink->rx_pipe = rx;
 
-- 
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