参照元

説明

引数

返り値

参考

実装

/**
 * of_platform_bus_probe() - Probe the device-tree for platform buses
 * @root: parent of the first level to probe or NULL for the root of the tree
 * @matches: match table for bus nodes
 * @parent: parent to hook devices from, NULL for toplevel
 *
 * Note that children of the provided root are not instantiated as devices
 * unless the specified root itself matches the bus list and is not NULL.
 */
int of_platform_bus_probe(struct device_node *root,
                          const struct of_device_id *matches,
                          struct device *parent)
{
        struct device_node *child;
        int rc = 0;
        root = root ? of_node_get(root) : of_find_node_by_path("/");
        if (!root)
                return -EINVAL;
        pr_debug("of_platform_bus_probe()\n");
        pr_debug(" starting at: %s\n", root->full_name);
        /* Do a self check of bus type, if there's a match, create children */
        if (of_match_node(matches, root)) {
                rc = of_platform_bus_create(root, matches, NULL, parent, false);
        } else for_each_child_of_node(root, child) {
                if (!of_match_node(matches, child))
                        continue;
                rc = of_platform_bus_create(child, matches, NULL, parent, false);
                if (rc) {
                        of_node_put(child);
                        break;
                }
        }
        of_node_put(root);
        return rc;
}
EXPORT_SYMBOL(of_platform_bus_probe);

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Last-modified: 2016-06-30 (木) 20:31:51