1 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index 190f8d30d1d3..f95d5bfe8248 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -265,6 +265,23 @@ extern int __must_check class_create_file(struct class *class,
 extern void class_remove_file(struct class *class,
                               const struct class_attribute *attr);
 
+/* Simple class attribute that is just a static string */
+
+struct class_attribute_string {
+        struct class_attribute attr;
+        char *str;
+};
+
+/* Currently read-only only */
+#define _CLASS_ATTR_STRING(_name, _mode, _str) \
+        { __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
+#define CLASS_ATTR_STRING(_name, _mode, _str) \
+        struct class_attribute_string class_attr_##_name = \
+                _CLASS_ATTR_STRING(_name, _mode, _str)
+
+extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr,
+                        char *buf);
+
 struct class_interface {
         struct list_head        node;
         struct class            *class;