From: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
To: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: barebox@lists.infradead.org
Subject: [PATCH v2 13/22] OF: base: import parent/child functions from Linux OF API
Date: Wed, 19 Jun 2013 11:09:42 +0200 [thread overview]
Message-ID: <1371632991-1504-14-git-send-email-sebastian.hesselbarth@gmail.com> (raw)
In-Reply-To: <1371576607-8090-1-git-send-email-sebastian.hesselbarth@gmail.com>
This imports of_get_parent, of_get_next_available_child, and
of_get_child_by_name and corresponding helpers from Linux OF API.
of_get_next_child is not imported but implemented as list iterator
instead. Also, of_get_child_count and of_get_available_child_count
are introduced.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
---
Cc: barebox@lists.infradead.org
Changelog:
v1->v2:
- make of_get_parent return node->parent also for root_node
(Suggested by Sascha Hauer)
- use list iterator instead of of_get_next_child
(Suggested by Sascha Hauer)
- move of_get_child_count to base.c to avoid compile warnings
- introduce of_get_available_child_count
---
drivers/of/base.c | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++
include/of.h | 41 ++++++++++++++++++++++
2 files changed, 138 insertions(+), 0 deletions(-)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 39eddb2..ee0496d 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -875,6 +875,103 @@ int of_device_is_available(const struct device_node *device)
}
EXPORT_SYMBOL(of_device_is_available);
+/**
+ * of_get_parent - Get a node's parent if any
+ * @node: Node to get parent
+ *
+ * Returns a pointer to the parent node or NULL if already at root.
+ */
+struct device_node *of_get_parent(const struct device_node *node)
+{
+ return (!node) ? NULL : node->parent;
+}
+EXPORT_SYMBOL(of_get_parent);
+
+/**
+ * of_get_next_available_child - Find the next available child node
+ * @node: parent node
+ * @prev: previous child of the parent node, or NULL to get first
+ *
+ * This function is like of_get_next_child(), except that it
+ * automatically skips any disabled nodes (i.e. status = "disabled").
+ */
+struct device_node *of_get_next_available_child(const struct device_node *node,
+ struct device_node *prev)
+{
+ for_each_child_of_node(node, prev)
+ if (of_device_is_available(prev))
+ return prev;
+ return NULL;
+}
+EXPORT_SYMBOL(of_get_next_available_child);
+
+/**
+ * of_get_child_count - Count child nodes of given parent node
+ * @parent: parent node
+ *
+ * Returns the number of child nodes or -EINVAL on NULL parent node.
+ */
+int of_get_child_count(const struct device_node *parent)
+{
+ struct device_node *child;
+ int num = 0;
+
+ if (!parent)
+ return -EINVAL;
+
+ for_each_child_of_node(parent, child)
+ num++;
+
+ return num;
+}
+EXPORT_SYMBOL(of_get_child_count);
+
+/**
+ * of_get_available_child_count - Count available child nodes of given
+ * parent node
+ * @parent: parent node
+ *
+ * Returns the number of available child nodes or -EINVAL on NULL parent
+ * node.
+ */
+int of_get_available_child_count(const struct device_node *parent)
+{
+ struct device_node *child;
+ int num = 0;
+
+ if (!parent)
+ return -EINVAL;
+
+ for_each_child_of_node(parent, child)
+ if (of_device_is_available(child))
+ num++;
+
+ return num;
+}
+EXPORT_SYMBOL(of_get_available_child_count);
+
+/**
+ * of_get_child_by_name - Find the child node by name for a given parent
+ * @node: parent node
+ * @name: child name to look for.
+ *
+ * This function looks for child node for given matching name
+ *
+ * Returns a node pointer if found or NULL.
+ */
+struct device_node *of_get_child_by_name(const struct device_node *node,
+ const char *name)
+{
+ struct device_node *child;
+
+ for_each_child_of_node(node, child)
+ if (child->name && (of_node_cmp(child->name, name) == 0))
+ return child;
+
+ return NULL;
+}
+EXPORT_SYMBOL(of_get_child_by_name);
+
void of_print_nodes(struct device_node *node, int indent)
{
struct device_node *n;
diff --git a/include/of.h b/include/of.h
index f508435..917466f 100644
--- a/include/of.h
+++ b/include/of.h
@@ -197,6 +197,14 @@ extern struct device_node *of_find_node_with_property(
struct device_node *from, const char *prop_name);
extern int of_device_is_available(const struct device_node *device);
+extern struct device_node *of_get_parent(const struct device_node *node);
+extern struct device_node *of_get_next_available_child(
+ const struct device_node *node, struct device_node *prev);
+extern int of_get_child_count(const struct device_node *parent);
+extern int of_get_available_child_count(const struct device_node *parent);
+extern struct device_node *of_get_child_by_name(const struct device_node *node,
+ const char *name);
+
extern void of_alias_scan(void);
extern int of_alias_get_id(struct device_node *np, const char *stem);
extern const char *of_alias_get(struct device_node *np);
@@ -241,6 +249,33 @@ static inline struct device_node *of_get_root_node(void)
return NULL;
}
+static inline struct device_node *of_get_parent(const struct device_node *node)
+{
+ 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 int of_get_child_count(const struct device_node *parent)
+{
+ return -ENOSYS;
+}
+
+static inline int of_get_available_child_count(const struct device_node *parent)
+{
+ return -ENOSYS;
+}
+
+static inline struct device_node *of_get_child_by_name(
+ const struct device_node *node, const char *name)
+{
+ return NULL;
+}
+
static inline struct property *of_find_property(const struct device_node *np,
const char *name,
int *lenp)
@@ -329,4 +364,10 @@ static inline struct device_node *of_find_matching_node(
for (dn = of_find_node_with_property(NULL, prop_name); dn; \
dn = of_find_node_with_property(dn, prop_name))
+#define for_each_child_of_node(parent, child) \
+ list_for_each_entry(child, &parent->children, parent_list)
+#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))
+
#endif /* __OF_H */
--
1.7.2.5
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next prev parent reply other threads:[~2013-06-19 9:10 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-18 17:29 [PATCH 00/22] Barebox OF API fixes, sync, and cleanup Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 01/22] lib: string: import case-insensitive string compare Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 02/22] OF: base: bail out early on missing matches for of_match_node Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 03/22] OF: base: also update property length on of_property_write_u32 Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 04/22] OF: base: export of_alias_scan Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 05/22] OF: base: convert strcmp to default string compare functions Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 06/22] OF: base: sync of_find_property with linux OF API Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 07/22] OF: base: sync of_find_node_by_path " Sebastian Hesselbarth
2013-06-18 20:13 ` Sascha Hauer
2013-06-18 20:19 ` Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 08/22] OF: base: rename of_node_disabled to of_device_is_available Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 09/22] OF: base: import of_find_node_by_name from Linux OF API Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 10/22] OF: base: import of_find_compatible_node " Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 11/22] OF: base: import of_find_matching_node_and_match " Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 12/22] OF: base: import of_find_node_with_property " Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 13/22] OF: base: import parent/child functions " Sebastian Hesselbarth
2013-06-18 20:18 ` Sascha Hauer
2013-06-18 20:29 ` Sascha Hauer
2013-06-18 20:34 ` Sebastian Hesselbarth
2013-06-18 17:29 ` [PATCH 14/22] OF: base: import of_property_read_* helpers " Sebastian Hesselbarth
2013-06-18 17:30 ` [PATCH 15/22] OF: base: import of_parse_phandle " Sebastian Hesselbarth
2013-06-18 17:30 ` [PATCH 16/22] OF: base: import parse phandle functions " Sebastian Hesselbarth
2013-06-18 17:30 ` [PATCH 17/22] OF: base: introduce property write for bool, u8, u16, and u64 Sebastian Hesselbarth
2013-06-18 17:30 ` [PATCH 18/22] OF: base: import property iterators from Linux OF API Sebastian Hesselbarth
2013-06-18 17:30 ` [PATCH 19/22] OF: base: remove of_tree_for_each_node from public API Sebastian Hesselbarth
2013-06-18 17:30 ` [PATCH 20/22] OF: base: remove of_find_child_by_name Sebastian Hesselbarth
2013-06-18 17:30 ` [PATCH 21/22] OF: base: convert and remove device_node_for_nach_child Sebastian Hesselbarth
2013-06-18 17:30 ` [PATCH 22/22] OF: base: cleanup base function include Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 00/22] Barebox OF API fixes, sync, and cleanup Sebastian Hesselbarth
2013-06-20 9:18 ` Sascha Hauer
2013-06-19 9:09 ` [PATCH v2 01/22] lib: string: import case-insensitive string compare Sebastian Hesselbarth
2013-06-20 9:04 ` Sascha Hauer
2013-06-19 9:09 ` [PATCH v2 02/22] OF: base: bail out early on missing matches for of_match_node Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 03/22] OF: base: also update property length on of_property_write_u32 Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 04/22] OF: base: export of_alias_scan Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 05/22] OF: base: convert strcmp to default string compare functions Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 06/22] OF: base: sync of_find_property with linux OF API Sebastian Hesselbarth
2013-06-20 8:57 ` Sascha Hauer
2013-06-19 9:09 ` [PATCH v2 07/22] OF: base: sync of_find_node_by_path " Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 08/22] OF: base: rename of_node_disabled to of_device_is_available Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 09/22] OF: base: import of_find_node_by_name from Linux OF API Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 10/22] OF: base: import of_find_compatible_node " Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 11/22] OF: base: import of_find_matching_node_and_match " Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 12/22] OF: base: import of_find_node_with_property " Sebastian Hesselbarth
2013-06-19 9:09 ` Sebastian Hesselbarth [this message]
2013-06-19 9:09 ` [PATCH v2 14/22] OF: base: import of_property_read_* helpers " Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 15/22] OF: base: import of_parse_phandle " Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 16/22] OF: base: import parse phandle functions " Sebastian Hesselbarth
2013-06-20 8:33 ` Sascha Hauer
2013-06-19 9:09 ` [PATCH v2 17/22] OF: base: introduce property write for bool, u8, u16, and u64 Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 18/22] OF: base: import property iterators from Linux OF API Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 19/22] OF: base: remove of_tree_for_each_node from public API Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 20/22] OF: base: remove of_find_child_by_name Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 21/22] OF: base: convert and remove device_node_for_nach_child Sebastian Hesselbarth
2013-06-19 9:09 ` [PATCH v2 22/22] OF: base: cleanup base function include Sebastian Hesselbarth
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