[PATCH] of: Add missing node iteration stubs for disabled CONFIG_OF

[tomasz.figa@gmail.com (Tomasz Figa)]

This patch moves several for_each macros out of the #ifdef CONFIG_OF
block and adds inline stubs for functions used by these macros, compiled
conditionally when CONFIG_OF is not enabled.

This eliminates the need to explicitly check for CONFIG_OF in driver
code using mentioned functions and macros.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
---
 include/linux/of.h | 92 +++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 63 insertions(+), 29 deletions(-)

diff --git a/include/linux/of.h b/include/linux/of.h
index a0f1292..7a736b8 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -86,6 +86,31 @@ static inline struct device_node *of_node_get(struct device_node *node)
 static inline void of_node_put(struct device_node *node) { }
 #endif /* !CONFIG_OF_DYNAMIC */
 
+#define for_each_node_by_name(dn, name) \
+	for (dn = of_find_node_by_name(NULL, name); dn; \
+	     dn = of_find_node_by_name(dn, name))
+#define for_each_node_by_type(dn, type) \
+	for (dn = of_find_node_by_type(NULL, type); dn; \
+	     dn = of_find_node_by_type(dn, type))
+#define for_each_compatible_node(dn, type, compatible) \
+	for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
+	     dn = of_find_compatible_node(dn, type, compatible))
+#define for_each_matching_node(dn, matches) \
+	for (dn = of_find_matching_node(NULL, matches); dn; \
+	     dn = of_find_matching_node(dn, matches))
+#define for_each_matching_node_and_match(dn, matches, match) \
+	for (dn = of_find_matching_node_and_match(NULL, matches, match); \
+	     dn; dn = of_find_matching_node_and_match(dn, matches, match))
+#define for_each_child_of_node(parent, child) \
+	for (child = of_get_next_child(parent, NULL); child != NULL; \
+	     child = of_get_next_child(parent, child))
+#define for_each_available_child_of_node(parent, child) \
+	for (child = of_get_next_available_child(parent, NULL); child != NULL; \
+	     child = of_get_next_available_child(parent, child))
+#define for_each_node_with_property(dn, prop_name) \
+	for (dn = of_find_node_with_property(NULL, prop_name); dn; \
+	     dn = of_find_node_with_property(dn, prop_name))
+
 #ifdef CONFIG_OF
 
 /* Pointer for first entry in chain of all nodes. */
@@ -167,19 +192,10 @@ static inline const char *of_node_full_name(const struct device_node *np)
 
 extern struct device_node *of_find_node_by_name(struct device_node *from,
 	const char *name);
-#define for_each_node_by_name(dn, name) \
-	for (dn = of_find_node_by_name(NULL, name); dn; \
-	     dn = of_find_node_by_name(dn, name))
 extern struct device_node *of_find_node_by_type(struct device_node *from,
 	const char *type);
-#define for_each_node_by_type(dn, type) \
-	for (dn = of_find_node_by_type(NULL, type); dn; \
-	     dn = of_find_node_by_type(dn, type))
 extern struct device_node *of_find_compatible_node(struct device_node *from,
 	const char *type, const char *compat);
-#define for_each_compatible_node(dn, type, compatible) \
-	for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
-	     dn = of_find_compatible_node(dn, type, compatible))
 extern struct device_node *of_find_matching_node_and_match(
 	struct device_node *from,
 	const struct of_device_id *matches,
@@ -190,12 +206,6 @@ static inline struct device_node *of_find_matching_node(
 {
 	return of_find_matching_node_and_match(from, matches, NULL);
 }
-#define for_each_matching_node(dn, matches) \
-	for (dn = of_find_matching_node(NULL, matches); dn; \
-	     dn = of_find_matching_node(dn, matches))
-#define for_each_matching_node_and_match(dn, matches, match) \
-	for (dn = of_find_matching_node_and_match(NULL, matches, match); \
-	     dn; dn = of_find_matching_node_and_match(dn, matches, match))
 extern struct device_node *of_find_node_by_path(const char *path);
 extern struct device_node *of_find_node_by_phandle(phandle handle);
 extern struct device_node *of_get_parent(const struct device_node *node);
@@ -207,14 +217,6 @@ extern struct device_node *of_get_next_available_child(
 
 extern struct device_node *of_get_child_by_name(const struct device_node *node,
 					const char *name);
-#define for_each_child_of_node(parent, child) \
-	for (child = of_get_next_child(parent, NULL); child != NULL; \
-	     child = of_get_next_child(parent, child))
-
-#define for_each_available_child_of_node(parent, child) \
-	for (child = of_get_next_available_child(parent, NULL); child != NULL; \
-	     child = of_get_next_available_child(parent, child))
-
 static inline int of_get_child_count(const struct device_node *np)
 {
 	struct device_node *child;
@@ -228,10 +230,6 @@ static inline int of_get_child_count(const struct device_node *np)
 
 extern struct device_node *of_find_node_with_property(
 	struct device_node *from, const char *prop_name);
-#define for_each_node_with_property(dn, prop_name) \
-	for (dn = of_find_node_with_property(NULL, prop_name); dn; \
-	     dn = of_find_node_with_property(dn, prop_name))
-
 extern struct property *of_find_property(const struct device_node *np,
 					 const char *name,
 					 int *lenp);
@@ -353,13 +351,28 @@ static inline struct device_node *of_find_node_by_name(struct device_node *from,
 	return NULL;
 }
 
+static inline struct device_node *of_find_node_by_type(struct device_node *from,
+	const char *type)
+{
+	return NULL;
+}
+
 static inline bool of_have_populated_dt(void)
 {
 	return false;
 }
 
-#define for_each_child_of_node(parent, child) \
-	while (0)
+static inline struct device_node *of_get_next_child(const struct device_node *node,
+					     struct device_node *prev)
+{
+	return NULL;
+}
+
+static inline struct device_node *of_get_next_available_child(
+	const struct device_node *node, struct device_node *prev)
+{
+	return NULL;
+}
 
 static inline struct device_node *of_get_child_by_name(
 					const struct device_node *node,
@@ -373,6 +386,12 @@ static inline int of_get_child_count(const struct device_node *np)
 	return 0;
 }
 
+static inline struct device_node *of_find_node_with_property(
+	struct device_node *from, const char *prop_name)
+{
+	return NULL;
+}
+
 static inline int of_device_is_compatible(const struct device_node *device,
 					  const char *name)
 {
@@ -394,6 +413,21 @@ static inline struct device_node *of_find_compatible_node(
 	return NULL;
 }
 
+static inline struct device_node *of_find_matching_node_and_match(
+	struct device_node *from,
+	const struct of_device_id *matches,
+	const struct of_device_id **match)
+{
+	return NULL;
+}
+
+static inline struct device_node *of_find_matching_node(
+	struct device_node *from,
+	const struct of_device_id *matches)
+{
+	return NULL;
+}
+
 static inline int of_property_read_u8_array(const struct device_node *np,
 			const char *propname, u8 *out_values, size_t sz)
 {
-- 
1.8.1.5