diff options
Diffstat (limited to 'drivers/base/swnode.c')
| -rw-r--r-- | drivers/base/swnode.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c index e7b3aa3bd55a..a1f3f0994f9f 100644 --- a/drivers/base/swnode.c +++ b/drivers/base/swnode.c @@ -51,7 +51,7 @@ EXPORT_SYMBOL_GPL(is_software_node); static struct swnode * software_node_to_swnode(const struct software_node *node) { - struct swnode *swnode; + struct swnode *swnode = NULL; struct kobject *k; if (!node) @@ -620,6 +620,43 @@ static const struct fwnode_operations software_node_ops = { /* -------------------------------------------------------------------------- */ +/** + * software_node_find_by_name - Find software node by name + * @parent: Parent of the software node + * @name: Name of the software node + * + * The function will find a node that is child of @parent and that is named + * @name. If no node is found, the function returns NULL. + * + * NOTE: you will need to drop the reference with fwnode_handle_put() after use. + */ +const struct software_node * +software_node_find_by_name(const struct software_node *parent, const char *name) +{ + struct swnode *swnode = NULL; + struct kobject *k; + + if (!name) + return NULL; + + spin_lock(&swnode_kset->list_lock); + + list_for_each_entry(k, &swnode_kset->list, entry) { + swnode = kobj_to_swnode(k); + if (parent == swnode->node->parent && swnode->node->name && + !strcmp(name, swnode->node->name)) { + kobject_get(&swnode->kobj); + break; + } + swnode = NULL; + } + + spin_unlock(&swnode_kset->list_lock); + + return swnode ? swnode->node : NULL; +} +EXPORT_SYMBOL_GPL(software_node_find_by_name); + static int software_node_register_properties(struct software_node *node, const struct property_entry *properties) |