diff options
| -rw-r--r-- | drivers/base/property.c | 32 | ||||
| -rw-r--r-- | include/linux/fwnode.h | 12 | ||||
| -rw-r--r-- | include/linux/property.h | 3 |
3 files changed, 47 insertions, 0 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c index 22849a89a8b5..8a53b8f1db66 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1311,3 +1311,35 @@ fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode) return endpoint; } EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_endpoint); + +/** + * fwnode_graph_parse_endpoint - parse common endpoint node properties + * @fwnode: pointer to endpoint fwnode_handle + * @endpoint: pointer to the fwnode endpoint data structure + * + * Parse @fwnode representing a graph endpoint node and store the + * information in @endpoint. The caller must hold a reference to + * @fwnode. + */ +int fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode, + struct fwnode_endpoint *endpoint) +{ + struct fwnode_handle *port_fwnode = fwnode_get_parent(fwnode); + + memset(endpoint, 0, sizeof(*endpoint)); + + endpoint->local_fwnode = fwnode; + + if (is_acpi_node(port_fwnode)) { + fwnode_property_read_u32(port_fwnode, "port", &endpoint->port); + fwnode_property_read_u32(fwnode, "endpoint", &endpoint->id); + } else { + fwnode_property_read_u32(port_fwnode, "reg", &endpoint->port); + fwnode_property_read_u32(fwnode, "reg", &endpoint->id); + } + + fwnode_handle_put(port_fwnode); + + return 0; +} +EXPORT_SYMBOL(fwnode_graph_parse_endpoint); diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index 8bd28ce6d76e..3dff2398a5f0 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -27,4 +27,16 @@ struct fwnode_handle { struct fwnode_handle *secondary; }; +/** + * struct fwnode_endpoint - Fwnode graph endpoint + * @port: Port number + * @id: Endpoint id + * @local_fwnode: reference to the related fwnode + */ +struct fwnode_endpoint { + unsigned int port; + unsigned int id; + const struct fwnode_handle *local_fwnode; +}; + #endif diff --git a/include/linux/property.h b/include/linux/property.h index 6e20a12a2eec..3a4e43599e01 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -280,4 +280,7 @@ struct fwnode_handle *fwnode_graph_get_remote_port( struct fwnode_handle *fwnode_graph_get_remote_endpoint( struct fwnode_handle *fwnode); +int fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode, + struct fwnode_endpoint *endpoint); + #endif /* _LINUX_PROPERTY_H_ */ |