参照元

説明

引数

返り値

参考

実装

/**
 * of_platform_populate() - Populate platform_devices from device tree data
 * @root: parent of the first level to probe or NULL for the root of the tree
 * @matches: match table, NULL to use the default
 * @lookup: auxdata table for matching id and platform_data with device nodes
 * @parent: parent to hook devices from, NULL for toplevel
 *
 * Similar to of_platform_bus_probe(), this function walks the device tree
 * and creates devices from nodes.  It differs in that it follows the modern
 * convention of requiring all device nodes to have a 'compatible' property,
 * and it is suitable for creating devices which are children of the root
 * node (of_platform_bus_probe will only create children of the root which
 * are selected by the @matches argument).
 *
 * New board support should be using this function instead of
 * of_platform_bus_probe().
 *
 * Returns 0 on success, < 0 on failure.
 */
int of_platform_populate(struct device_node *root,
                        const struct of_device_id *matches,
                        const struct of_dev_auxdata *lookup,
                        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;
        for_each_child_of_node(root, child) {
                rc = of_platform_bus_create(child, matches, lookup, parent, true);
                if (rc) {
                        of_node_put(child);
                        break;
                }
        }
        of_node_set_flag(root, OF_POPULATED_BUS);
        of_node_put(root);
        return rc;
}
EXPORT_SYMBOL_GPL(of_platform_populate);

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Last-modified: 2016-06-30 (木) 20:34:56