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path: root/drivers/of/base.c
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Diffstat (limited to 'drivers/of/base.c')
-rw-r--r--drivers/of/base.c91
1 files changed, 54 insertions, 37 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 0d8955605738..b403f9d98461 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1659,7 +1659,7 @@ EXPORT_SYMBOL(of_count_phandle_with_args);
/**
* __of_add_property - Add a property to a node without lock operations
*/
-static int __of_add_property(struct device_node *np, struct property *prop)
+int __of_add_property(struct device_node *np, struct property *prop)
{
struct property **next;
@@ -1701,6 +1701,25 @@ int of_add_property(struct device_node *np, struct property *prop)
return rc;
}
+int __of_remove_property(struct device_node *np, struct property *prop)
+{
+ struct property **next;
+
+ for (next = &np->properties; *next; next = &(*next)->next) {
+ if (*next == prop)
+ break;
+ }
+ if (*next == NULL)
+ return -ENODEV;
+
+ /* found the node */
+ *next = prop->next;
+ prop->next = np->deadprops;
+ np->deadprops = prop;
+
+ return 0;
+}
+
/**
* of_remove_property - Remove a property from a node.
*
@@ -1711,9 +1730,7 @@ int of_add_property(struct device_node *np, struct property *prop)
*/
int of_remove_property(struct device_node *np, struct property *prop)
{
- struct property **next;
unsigned long flags;
- int found = 0;
int rc;
rc = of_property_notify(OF_RECONFIG_REMOVE_PROPERTY, np, prop);
@@ -1721,22 +1738,11 @@ int of_remove_property(struct device_node *np, struct property *prop)
return rc;
raw_spin_lock_irqsave(&devtree_lock, flags);
- next = &np->properties;
- while (*next) {
- if (*next == prop) {
- /* found the node */
- *next = prop->next;
- prop->next = np->deadprops;
- np->deadprops = prop;
- found = 1;
- break;
- }
- next = &(*next)->next;
- }
+ rc = __of_remove_property(np, prop);
raw_spin_unlock_irqrestore(&devtree_lock, flags);
- if (!found)
- return -ENODEV;
+ if (rc)
+ return rc;
/* at early boot, bail hear and defer setup to of_init() */
if (!of_kset)
@@ -1747,6 +1753,32 @@ int of_remove_property(struct device_node *np, struct property *prop)
return 0;
}
+int __of_update_property(struct device_node *np, struct property *newprop,
+ struct property **oldpropp)
+{
+ struct property **next, *oldprop;
+
+ for (next = &np->properties; *next; next = &(*next)->next) {
+ if (of_prop_cmp((*next)->name, newprop->name) == 0)
+ break;
+ }
+ *oldpropp = oldprop = *next;
+
+ if (oldprop) {
+ /* replace the node */
+ newprop->next = oldprop->next;
+ *next = newprop;
+ oldprop->next = np->deadprops;
+ np->deadprops = oldprop;
+ } else {
+ /* new node */
+ newprop->next = NULL;
+ *next = newprop;
+ }
+
+ return 0;
+}
+
/*
* of_update_property - Update a property in a node, if the property does
* not exist, add it.
@@ -1758,34 +1790,19 @@ int of_remove_property(struct device_node *np, struct property *prop)
*/
int of_update_property(struct device_node *np, struct property *newprop)
{
- struct property **next, *oldprop;
+ struct property *oldprop;
unsigned long flags;
int rc;
+ if (!newprop->name)
+ return -EINVAL;
+
rc = of_property_notify(OF_RECONFIG_UPDATE_PROPERTY, np, newprop);
if (rc)
return rc;
- if (!newprop->name)
- return -EINVAL;
-
raw_spin_lock_irqsave(&devtree_lock, flags);
- next = &np->properties;
- oldprop = __of_find_property(np, newprop->name, NULL);
- if (!oldprop) {
- /* add the new node */
- rc = __of_add_property(np, newprop);
- } else while (*next) {
- /* replace the node */
- if (*next == oldprop) {
- newprop->next = oldprop->next;
- *next = newprop;
- oldprop->next = np->deadprops;
- np->deadprops = oldprop;
- break;
- }
- next = &(*next)->next;
- }
+ rc = __of_update_property(np, newprop, &oldprop);
raw_spin_unlock_irqrestore(&devtree_lock, flags);
if (rc)
return rc;