[PATCH] of: Output devicetree alias names in uevent

@@ -19,6 +19,7 @@
  */
 #include <linux/ctype.h>
 #include <linux/module.h>
+#include <linux/device.h>
 #include <linux/of.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>

@@ -1177,6 +1178,30 @@ static void of_alias_add(struct alias_prop *ap, struct device_node *np,
 }

 /**
+ * of_device_uevent_aliases - Display OF alises in uevent
+ */
+void of_device_uevent_aliases(struct device_node *node,
+			      struct kobj_uevent_env *env)
+{
+	struct alias_prop *app;
+	int seen = 0;
+
+	mutex_lock(&of_aliases_mutex);
+	list_for_each_entry(app, &aliases_lookup, link) {
+		if (node == app->np) {
+			add_uevent_var(env, "OF_ALIAS_%d=%s%d", seen, app->stem,
+				       app->id);
+			seen++;
+		}
+	}
+
+	if (seen)
+		add_uevent_var(env, "OF_ALIAS_N=%d", seen);
+
+	mutex_unlock(&of_aliases_mutex);
+}
+
+/**
  * of_alias_scan - Scan all properties of 'aliases' node
  *
  * The function scans all the properties of 'aliases' node and populate

@@ -153,6 +153,7 @@ void of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 		seen++;
 	}
 	add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen);
+	of_device_uevent_aliases(dev->of_node, env);
 }

 int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)

@@ -36,6 +36,8 @@ extern ssize_t of_device_get_modalias(struct device *dev,
 					char *str, ssize_t len);

 extern void of_device_uevent(struct device *dev, struct kobj_uevent_env *env);
+extern void of_device_uevent_aliases(struct device_node *node,
+					struct kobj_uevent_env *env);
 extern int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env);

 static inline void of_device_node_put(struct device *dev)
--

@@ -24,32 +24,15 @@
 #include <linux/slab.h>
 #include <linux/proc_fs.h>

-/**
- * struct alias_prop - Alias property in 'aliases' node
- * @link:	List node to link the structure in aliases_lookup list
- * @alias:	Alias property name
- * @np:		Pointer to device_node that the alias stands for
- * @id:		Index value from end of alias name
- * @stem:	Alias string without the index
- *
- * The structure represents one alias property of 'aliases' node as
- * an entry in aliases_lookup list.
- */
-struct alias_prop {
-	struct list_head link;
-	const char *alias;
-	struct device_node *np;
-	int id;
-	char stem[0];
-};
+#include "of_private.h"

-static LIST_HEAD(aliases_lookup);
+LIST_HEAD(aliases_lookup);

 struct device_node *allnodes;
 struct device_node *of_chosen;
 struct device_node *of_aliases;

-static DEFINE_MUTEX(of_aliases_mutex);
+DEFINE_MUTEX(of_aliases_mutex);

 /* use when traversing tree through the allnext, child, sibling,
  * or parent members of struct device_node.

@@ -8,6 +8,7 @@
 #include <linux/slab.h>

 #include <asm/errno.h>
+#include "of_private.h"

 /**
  * of_match_device - Tell if a struct device matches an of_device_id list

@@ -131,6 +132,7 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
 void of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	const char *compat;
+	struct alias_prop *app;
 	int seen = 0, cplen, sl;

 	if ((!dev) || (!dev->of_node))

@@ -153,6 +155,21 @@ void of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 		seen++;
 	}
 	add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen);
+
+	seen = 0;
+	mutex_lock(&of_aliases_mutex);
+	list_for_each_entry(app, &aliases_lookup, link) {
+		if (dev->of_node == app->np) {
+			add_uevent_var(env, "OF_ALIAS_%d=%s", seen,
+				       app->alias);
+			seen++;
+		}
+	}
+
+	if (seen)
+		add_uevent_var(env, "OF_ALIAS_N=%d", seen);
+
+	mutex_unlock(&of_aliases_mutex);
 }

 int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)

@@ -0,0 +1,33 @@
+/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+/**
+ * struct alias_prop - Alias property in 'aliases' node
+ * @link:	List node to link the structure in aliases_lookup list
+ * @alias:	Alias property name
+ * @np:		Pointer to device_node that the alias stands for
+ * @id:		Index value from end of alias name
+ * @stem:	Alias string without the index
+ *
+ * The structure represents one alias property of 'aliases' node as
+ * an entry in aliases_lookup list.
+ */
+struct alias_prop {
+	struct list_head link;
+	const char *alias;
+	struct device_node *np;
+	int id;
+	char stem[0];
+};
+
+extern struct mutex of_aliases_mutex;
+extern struct list_head aliases_lookup;
--

@@ -24,32 +24,15 @@
 #include <linux/slab.h>
 #include <linux/proc_fs.h>

-/**
- * struct alias_prop - Alias property in 'aliases' node
- * @link:	List node to link the structure in aliases_lookup list
- * @alias:	Alias property name
- * @np:		Pointer to device_node that the alias stands for
- * @id:		Index value from end of alias name
- * @stem:	Alias string without the index
- *
- * The structure represents one alias property of 'aliases' node as
- * an entry in aliases_lookup list.
- */
-struct alias_prop {
-	struct list_head link;
-	const char *alias;
-	struct device_node *np;
-	int id;
-	char stem[0];
-};
+#include "of_private.h"

-static LIST_HEAD(aliases_lookup);
+LIST_HEAD(aliases_lookup);

 struct device_node *allnodes;
 struct device_node *of_chosen;
 struct device_node *of_aliases;

-static DEFINE_MUTEX(of_aliases_mutex);
+DEFINE_MUTEX(of_aliases_mutex);

 /* use when traversing tree through the allnext, child, sibling,
  * or parent members of struct device_node.

@@ -8,6 +8,7 @@
 #include <linux/slab.h>

 #include <asm/errno.h>
+#include "of_private.h"

 /**
  * of_match_device - Tell if a struct device matches an of_device_id list

@@ -131,6 +132,7 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
 void of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	const char *compat;
+	struct alias_prop *app;
 	int seen = 0, cplen, sl;

 	if ((!dev) || (!dev->of_node))

@@ -153,6 +155,21 @@ void of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 		seen++;
 	}
 	add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen);
+
+	seen = 0;
+	mutex_lock(&of_aliases_mutex);
+	list_for_each_entry(app, &aliases_lookup, link) {
+		if (dev->of_node == app->np) {
+			add_uevent_var(env, "OF_ALIAS_%d=%s", seen,
+				       app->alias);
+			seen++;
+		}
+	}
+
+	if (seen)
+		add_uevent_var(env, "OF_ALIAS_N=%d", seen);
+
+	mutex_unlock(&of_aliases_mutex);
 }

 int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)

@@ -0,0 +1,41 @@
+/*
+ * Procedures for creating, accessing and interpreting the device tree.
+ *
+ * Paul Mackerras	August 1996.
+ * Copyright (C) 1996-2005 Paul Mackerras.
+ *
+ *  Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
+ *    {engebret|bergner}@us.ibm.com
+ *
+ *  Adapted for sparc and sparc64 by David S. Miller davem at davemloft.net
+ *
+ *  Reconsolidated from arch/x/kernel/prom.c by Stephen Rothwell and
+ *  Grant Likely.
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+/**
+ * struct alias_prop - Alias property in 'aliases' node
+ * @link:	List node to link the structure in aliases_lookup list
+ * @alias:	Alias property name
+ * @np:		Pointer to device_node that the alias stands for
+ * @id:		Index value from end of alias name
+ * @stem:	Alias string without the index
+ *
+ * The structure represents one alias property of 'aliases' node as
+ * an entry in aliases_lookup list.
+ */
+struct alias_prop {
+	struct list_head link;
+	const char *alias;
+	struct device_node *np;
+	int id;
+	char stem[0];
+};
+
+extern struct mutex of_aliases_mutex;
+extern struct list_head aliases_lookup;
--