[RFC PATCH 01/12] dt: Add of_find_child_node_by_name()
From: Stephen Warren <hidden>
Date: 2011-08-12 22:55:34
Also in:
linux-devicetree, linux-tegra, lkml
Subsystem:
open firmware and flattened device tree, the rest · Maintainers:
Rob Herring, Saravana Kannan, Linus Torvalds
This function retrieves a named child node of a given parent node. Signed-off-by: Stephen Warren <redacted> --- drivers/of/base.c | 18 ++++++++++++++++++ include/linux/of.h | 2 ++ 2 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 3ff22e3..7eea9e3 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c@@ -388,6 +388,24 @@ struct device_node *of_find_node_by_name(struct device_node *from, } EXPORT_SYMBOL(of_find_node_by_name); +struct device_node *of_find_child_node_by_name( + const struct device_node *parent, const char *name) +{ + struct device_node *child; + + read_lock(&devtree_lock); + + for_each_child_of_node(parent, child) { + if (!strcmp(child->name, name)) + break; + } + + read_unlock(&devtree_lock); + + return child; +} +EXPORT_SYMBOL(of_find_child_node_by_name); + /** * of_find_node_by_type - Find a node by its "device_type" property * @from: The node to start searching from, or NULL to start searching
diff --git a/include/linux/of.h b/include/linux/of.h
index 9180dc5..032c71b 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h@@ -161,6 +161,8 @@ extern struct device_node *of_find_node_by_name(struct device_node *from, #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_child_node_by_name( + const struct device_node *node, const char *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) \
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1.7.0.4