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From:   Arun Kumar Neelakantam <aneela@codeaurora.org>
To:     ohad@wizery.com, bjorn.andersson@linaro.org, clew@codeaurora.org,
        sricharan@codeaurora.org
Cc:     linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org,
        Arun Kumar Neelakantam <aneela@codeaurora.org>,
        Andy Gross <agross@kernel.org>,
        linux-arm-msm@vger.kernel.org (open list:ARM/QUALCOMM SUPPORT)
Subject: [PATCH V5 4/5] rpmsg: glink: Expose rpmsg name attr for glink
Date:   Wed, 13 May 2020 10:40:05 +0530
Message-Id: <1589346606-15046-5-git-send-email-aneela@codeaurora.org>
In-Reply-To: <1589346606-15046-1-git-send-email-aneela@codeaurora.org>
References: <1589346606-15046-1-git-send-email-aneela@codeaurora.org>
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From: Chris Lew <clew@codeaurora.org>

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 3a7f87c..0e8a28c0 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