X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Flinux%2Fsysdev.h;h=f395bb3fa2f2065375f25c51ea8221d27a4d3dc6;hb=26dcce0fabbef75ae426461edf21b5030bad60f3;hp=e285746588d68baf4dccc894e70768005342e04a;hpb=0d090b6819e3559dabb05773c4a6dacc4fa94d0e;p=firefly-linux-kernel-4.4.55.git

diff --git a/include/linux/sysdev.h b/include/linux/sysdev.h
index e285746588d6..f395bb3fa2f2 100644
--- a/include/linux/sysdev.h
+++ b/include/linux/sysdev.h
@@ -29,6 +29,7 @@
 struct sys_device;
 
 struct sysdev_class {
+	const char *name;
 	struct list_head	drivers;
 
 	/* Default operations for these types of devices */
@@ -44,12 +45,16 @@ struct sysdev_class_attribute {
 	ssize_t (*store)(struct sysdev_class *, const char *, size_t);
 };
 
-#define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) 		\
-struct sysdev_class_attribute attr_##_name = { 			\
+#define _SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) 		\
+{					 			\
 	.attr = {.name = __stringify(_name), .mode = _mode },	\
 	.show	= _show,					\
 	.store	= _store,					\
-};
+}
+
+#define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) 		\
+	struct sysdev_class_attribute attr_##_name = 		\
+		_SYSDEV_CLASS_ATTR(_name,_mode,_show,_store)
 
 
 extern int sysdev_class_register(struct sysdev_class *);
@@ -94,22 +99,58 @@ extern void sysdev_unregister(struct sys_device *);
 
 struct sysdev_attribute { 
 	struct attribute	attr;
-	ssize_t (*show)(struct sys_device *, char *);
-	ssize_t (*store)(struct sys_device *, const char *, size_t);
+	ssize_t (*show)(struct sys_device *, struct sysdev_attribute *, char *);
+	ssize_t (*store)(struct sys_device *, struct sysdev_attribute *,
+			 const char *, size_t);
 };
 
 
-#define _SYSDEV_ATTR(_name,_mode,_show,_store)			\
+#define _SYSDEV_ATTR(_name, _mode, _show, _store)		\
 {								\
 	.attr = { .name = __stringify(_name), .mode = _mode },	\
 	.show	= _show,					\
 	.store	= _store,					\
 }
 
-#define SYSDEV_ATTR(_name,_mode,_show,_store)		\
-struct sysdev_attribute attr_##_name = _SYSDEV_ATTR(_name,_mode,_show,_store);
+#define SYSDEV_ATTR(_name, _mode, _show, _store)		\
+	struct sysdev_attribute attr_##_name =			\
+		_SYSDEV_ATTR(_name, _mode, _show, _store);
 
 extern int sysdev_create_file(struct sys_device *, struct sysdev_attribute *);
 extern void sysdev_remove_file(struct sys_device *, struct sysdev_attribute *);
 
+struct sysdev_ext_attribute {
+	struct sysdev_attribute attr;
+	void *var;
+};
+
+/*
+ * Support for simple variable sysdev attributes.
+ * The pointer to the variable is stored in a sysdev_ext_attribute
+ */
+
+/* Add more types as needed */
+
+extern ssize_t sysdev_show_ulong(struct sys_device *, struct sysdev_attribute *,
+				char *);
+extern ssize_t sysdev_store_ulong(struct sys_device *,
+			struct sysdev_attribute *, const char *, size_t);
+extern ssize_t sysdev_show_int(struct sys_device *, struct sysdev_attribute *,
+				char *);
+extern ssize_t sysdev_store_int(struct sys_device *,
+			struct sysdev_attribute *, const char *, size_t);
+
+#define _SYSDEV_ULONG_ATTR(_name, _mode, _var)				\
+	{ _SYSDEV_ATTR(_name, _mode, sysdev_show_ulong, sysdev_store_ulong), \
+	  &(_var) }
+#define SYSDEV_ULONG_ATTR(_name, _mode, _var)			\
+	struct sysdev_ext_attribute attr_##_name = 		\
+		_SYSDEV_ULONG_ATTR(_name, _mode, _var);
+#define _SYSDEV_INT_ATTR(_name, _mode, _var)				\
+	{ _SYSDEV_ATTR(_name, _mode, sysdev_show_int, sysdev_store_int), \
+	  &(_var) }
+#define SYSDEV_INT_ATTR(_name, _mode, _var)			\
+	struct sysdev_ext_attribute attr_##_name = 		\
+		_SYSDEV_INT_ATTR(_name, _mode, _var);
+
 #endif /* _SYSDEV_H_ */