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Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/base.c91
1 files changed, 70 insertions, 21 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 960ae5bf3ddc..16ee7a08e044 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -164,16 +164,14 @@ void of_node_put(struct device_node *node)
EXPORT_SYMBOL(of_node_put);
#endif /* CONFIG_OF_DYNAMIC */
-struct property *of_find_property(const struct device_node *np,
- const char *name,
- int *lenp)
+static struct property *__of_find_property(const struct device_node *np,
+ const char *name, int *lenp)
{
struct property *pp;
if (!np)
return NULL;
- read_lock(&devtree_lock);
for (pp = np->properties; pp; pp = pp->next) {
if (of_prop_cmp(pp->name, name) == 0) {
if (lenp)
@@ -181,6 +179,18 @@ struct property *of_find_property(const struct device_node *np,
break;
}
}
+
+ return pp;
+}
+
+struct property *of_find_property(const struct device_node *np,
+ const char *name,
+ int *lenp)
+{
+ struct property *pp;
+
+ read_lock(&devtree_lock);
+ pp = __of_find_property(np, name, lenp);
read_unlock(&devtree_lock);
return pp;
@@ -214,8 +224,20 @@ EXPORT_SYMBOL(of_find_all_nodes);
* Find a property with a given name for a given node
* and return the value.
*/
+static const void *__of_get_property(const struct device_node *np,
+ const char *name, int *lenp)
+{
+ struct property *pp = __of_find_property(np, name, lenp);
+
+ return pp ? pp->value : NULL;
+}
+
+/*
+ * Find a property with a given name for a given node
+ * and return the value.
+ */
const void *of_get_property(const struct device_node *np, const char *name,
- int *lenp)
+ int *lenp)
{
struct property *pp = of_find_property(np, name, lenp);
@@ -226,13 +248,13 @@ EXPORT_SYMBOL(of_get_property);
/** Checks if the given "compat" string matches one of the strings in
* the device's "compatible" property
*/
-int of_device_is_compatible(const struct device_node *device,
- const char *compat)
+static int __of_device_is_compatible(const struct device_node *device,
+ const char *compat)
{
const char* cp;
int cplen, l;
- cp = of_get_property(device, "compatible", &cplen);
+ cp = __of_get_property(device, "compatible", &cplen);
if (cp == NULL)
return 0;
while (cplen > 0) {
@@ -245,6 +267,20 @@ int of_device_is_compatible(const struct device_node *device,
return 0;
}
+
+/** Checks if the given "compat" string matches one of the strings in
+ * the device's "compatible" property
+ */
+int of_device_is_compatible(const struct device_node *device,
+ const char *compat)
+{
+ int res;
+
+ read_lock(&devtree_lock);
+ res = __of_device_is_compatible(device, compat);
+ read_unlock(&devtree_lock);
+ return res;
+}
EXPORT_SYMBOL(of_device_is_compatible);
/**
@@ -518,7 +554,8 @@ struct device_node *of_find_compatible_node(struct device_node *from,
if (type
&& !(np->type && (of_node_cmp(np->type, type) == 0)))
continue;
- if (of_device_is_compatible(np, compatible) && of_node_get(np))
+ if (__of_device_is_compatible(np, compatible) &&
+ of_node_get(np))
break;
}
of_node_put(from);
@@ -562,15 +599,9 @@ out:
}
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
- * @node: the of device structure to match against
- *
- * Low level utility function used by device matching.
- */
-const struct of_device_id *of_match_node(const struct of_device_id *matches,
- const struct device_node *node)
+static
+const struct of_device_id *__of_match_node(const struct of_device_id *matches,
+ const struct device_node *node)
{
if (!matches)
return NULL;
@@ -584,14 +615,32 @@ const struct of_device_id *of_match_node(const struct of_device_id *matches,
match &= node->type
&& !strcmp(matches->type, node->type);
if (matches->compatible[0])
- match &= of_device_is_compatible(node,
- matches->compatible);
+ match &= __of_device_is_compatible(node,
+ matches->compatible);
if (match)
return matches;
matches++;
}
return NULL;
}
+
+/**
+ * of_match_node - Tell if an device_node has a matching of_match structure
+ * @matches: array of of device match structures to search in
+ * @node: the of device structure to match against
+ *
+ * Low level utility function used by device matching.
+ */
+const struct of_device_id *of_match_node(const struct of_device_id *matches,
+ const struct device_node *node)
+{
+ const struct of_device_id *match;
+
+ read_lock(&devtree_lock);
+ match = __of_match_node(matches, node);
+ read_unlock(&devtree_lock);
+ return match;
+}
EXPORT_SYMBOL(of_match_node);
/**
@@ -620,7 +669,7 @@ struct device_node *of_find_matching_node_and_match(struct device_node *from,
read_lock(&devtree_lock);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext) {
- m = of_match_node(matches, np);
+ m = __of_match_node(matches, np);
if (m && of_node_get(np)) {
if (match)
*match = m;