From 2bd5452d46df46d99b869b59a1532647e2981d75 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Tue, 28 Mar 2017 10:52:25 +0300 Subject: device property: Add support for fwnode endpoints Similar to OF endpoints, endpoint type nodes can be also supported on ACPI. In order to make it possible for drivers to ignore the matter, add a type for fwnode_endpoint and a function to parse them. On ACPI, find the child node index instead of relying on the "endpoint" property. Signed-off-by: Sakari Ailus Reviewed-by: Mika Westerberg Signed-off-by: Rafael J. Wysocki --- drivers/base/property.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'drivers/base') 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); -- cgit