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OF: base: import of_find_node_with_property from Linux OF API 

This imports of_find_node_with_property and corresponding helpers
from Linux OF API.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
This commit is contained in:
Sebastian Hesselbarth 2013-06-13 20:34:33 +02:00 committed by Sascha Hauer
parent 8b362a690b
commit b45e2c0b47
2 changed files with 37 additions and 0 deletions
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26
drivers/of/base.c
View File

@ -367,6 +367,32 @@ struct device_node *of_find_compatible_node(struct device_node *from,
}
EXPORT_SYMBOL(of_find_compatible_node);
/**
* of_find_node_with_property - Find a node which has a property with
* the given name.
* @from: The node to start searching from or NULL, the node
* you pass will not be searched, only the next one
* will; typically, you pass what the previous call
* returned.
* @prop_name: The name of the property to look for.
*
* Returns a pointer to the node found or NULL.
*/
struct device_node *of_find_node_with_property(struct device_node *from,
const char *prop_name)
{
struct device_node *np;
of_tree_for_each_node(np, from) {
struct property *pp = of_find_property(np, prop_name, NULL);
if (pp)
return np;
}
return NULL;
}
EXPORT_SYMBOL(of_find_node_with_property);
/**
* of_match_node - Tell if an device_node has a matching of_match structure
* @matches: array of of device match structures to search in

11
include/of.h
View File

@ -193,6 +193,8 @@ extern 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);
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 void of_alias_scan(void);
@ -279,6 +281,12 @@ static inline struct device_node *of_find_matching_node_and_match(
return NULL;
}
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_available(const struct device_node *device)
{
return 0;
@ -317,5 +325,8 @@ static inline struct device_node *of_find_matching_node(
#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_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))
#endif /* __OF_H */