diff options
Diffstat (limited to 'drivers/base/property.c')
| -rw-r--r-- | drivers/base/property.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c index b979f8a..ac3590b 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1216,6 +1216,43 @@ fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode) EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_endpoint); /** + * fwnode_graph_get_remote_node - get remote parent node for given port/endpoint + * @fwnode: pointer to parent fwnode_handle containing graph port/endpoint + * @port_id: identifier of the parent port node + * @endpoint_id: identifier of the endpoint node + * + * Return: Remote fwnode handle associated with remote endpoint node linked + * to @node. Use fwnode_node_put() on it when done. + */ +struct fwnode_handle *fwnode_graph_get_remote_node(struct fwnode_handle *fwnode, + u32 port_id, u32 endpoint_id) +{ + struct fwnode_handle *endpoint = NULL; + + while ((endpoint = fwnode_graph_get_next_endpoint(fwnode, endpoint))) { + struct fwnode_endpoint fwnode_ep; + struct fwnode_handle *remote; + int ret; + + ret = fwnode_graph_parse_endpoint(endpoint, &fwnode_ep); + if (ret < 0) + continue; + + if (fwnode_ep.port != port_id || fwnode_ep.id != endpoint_id) + continue; + + remote = fwnode_graph_get_remote_port_parent(endpoint); + if (!remote) + return NULL; + + return fwnode_device_is_available(remote) ? remote : NULL; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_node); + +/** * fwnode_graph_parse_endpoint - parse common endpoint node properties * @fwnode: pointer to endpoint fwnode_handle * @endpoint: pointer to the fwnode endpoint data structure |
