1 files changed, 69 insertions, 2 deletions

diff --git a/drivers/hwtracing/coresight/coresight-sysfs.c b/drivers/hwtracing/coresight/coresight-sysfs.c
index feadaf065b53..5e52324aa9ac 100644
--- a/drivers/hwtracing/coresight/coresight-sysfs.c
+++ b/drivers/hwtracing/coresight/coresight-sysfs.c
@@ -7,6 +7,7 @@
 #include <linux/device.h>
 #include <linux/idr.h>
 #include <linux/kernel.h>
+#include <linux/property.h>
 
 #include "coresight-priv.h"
 #include "coresight-trace-id.h"
@@ -371,17 +372,81 @@ static ssize_t enable_source_store(struct device *dev,
 }
 static DEVICE_ATTR_RW(enable_source);
 
+static ssize_t label_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+
+	const char *str;
+	int ret;
+
+	ret = fwnode_property_read_string(dev_fwnode(dev), "label", &str);
+	if (ret == 0)
+		return sysfs_emit(buf, "%s\n", str);
+	else
+		return ret;
+}
+static DEVICE_ATTR_RO(label);
+
+static umode_t label_is_visible(struct kobject *kobj,
+				   struct attribute *attr, int n)
+{
+	struct device *dev = kobj_to_dev(kobj);
+
+	if (attr == &dev_attr_label.attr) {
+		if (fwnode_property_present(dev_fwnode(dev), "label"))
+			return attr->mode;
+		else
+			return 0;
+	}
+
+	return attr->mode;
+}
+
 static struct attribute *coresight_sink_attrs[] = {
 	&dev_attr_enable_sink.attr,
+	&dev_attr_label.attr,
 	NULL,
 };
-ATTRIBUTE_GROUPS(coresight_sink);
+
+static struct attribute_group coresight_sink_group = {
+	.attrs = coresight_sink_attrs,
+	.is_visible = label_is_visible,
+};
+__ATTRIBUTE_GROUPS(coresight_sink);
 
 static struct attribute *coresight_source_attrs[] = {
 	&dev_attr_enable_source.attr,
+	&dev_attr_label.attr,
 	NULL,
 };
-ATTRIBUTE_GROUPS(coresight_source);
+
+static struct attribute_group coresight_source_group = {
+	.attrs = coresight_source_attrs,
+	.is_visible = label_is_visible,
+};
+__ATTRIBUTE_GROUPS(coresight_source);
+
+static struct attribute *coresight_link_attrs[] = {
+	&dev_attr_label.attr,
+	NULL,
+};
+
+static struct attribute_group coresight_link_group = {
+	.attrs = coresight_link_attrs,
+	.is_visible = label_is_visible,
+};
+__ATTRIBUTE_GROUPS(coresight_link);
+
+static struct attribute *coresight_helper_attrs[] = {
+	&dev_attr_label.attr,
+	NULL,
+};
+
+static struct attribute_group coresight_helper_group = {
+	.attrs = coresight_helper_attrs,
+	.is_visible = label_is_visible,
+};
+__ATTRIBUTE_GROUPS(coresight_helper);
 
 const struct device_type coresight_dev_type[] = {
 	[CORESIGHT_DEV_TYPE_SINK] = {
@@ -390,6 +455,7 @@ const struct device_type coresight_dev_type[] = {
 	},
 	[CORESIGHT_DEV_TYPE_LINK] = {
 		.name = "link",
+		.groups = coresight_link_groups,
 	},
 	[CORESIGHT_DEV_TYPE_LINKSINK] = {
 		.name = "linksink",
@@ -401,6 +467,7 @@ const struct device_type coresight_dev_type[] = {
 	},
 	[CORESIGHT_DEV_TYPE_HELPER] = {
 		.name = "helper",
+		.groups = coresight_helper_groups,
 	}
 };
 /* Ensure the enum matches the names and groups */