From d7cf5590393132993f2e6d2618fd23a20a6342ca Mon Sep 17 00:00:00 2001 From: Heikki Krogerus Date: Mon, 7 Sep 2020 15:05:31 +0300 Subject: device property: Move fwnode_connection_find_match() under drivers/base/property.c The function is now only a helper that searches the connection from device graph and then by checking if the supplied connection identifier matches a property that contains reference. Signed-off-by: Heikki Krogerus Link: https://lore.kernel.org/r/20200907120532.37611-2-heikki.krogerus@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/base/property.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) (limited to 'drivers/base/property.c') diff --git a/drivers/base/property.c b/drivers/base/property.c index d58aa98fe964..4c43d30145c6 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1184,3 +1184,76 @@ const void *device_get_match_data(struct device *dev) return fwnode_call_ptr_op(dev_fwnode(dev), device_get_match_data, dev); } EXPORT_SYMBOL_GPL(device_get_match_data); + +static void * +fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id, + void *data, devcon_match_fn_t match) +{ + struct fwnode_handle *node; + struct fwnode_handle *ep; + void *ret; + + fwnode_graph_for_each_endpoint(fwnode, ep) { + node = fwnode_graph_get_remote_port_parent(ep); + if (!fwnode_device_is_available(node)) + continue; + + ret = match(node, con_id, data); + fwnode_handle_put(node); + if (ret) { + fwnode_handle_put(ep); + return ret; + } + } + return NULL; +} + +static void * +fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id, + void *data, devcon_match_fn_t match) +{ + struct fwnode_handle *node; + void *ret; + int i; + + for (i = 0; ; i++) { + node = fwnode_find_reference(fwnode, con_id, i); + if (IS_ERR(node)) + break; + + ret = match(node, NULL, data); + fwnode_handle_put(node); + if (ret) + return ret; + } + + return NULL; +} + +/** + * fwnode_connection_find_match - Find connection from a device node + * @fwnode: Device node with the connection + * @con_id: Identifier for the connection + * @data: Data for the match function + * @match: Function to check and convert the connection description + * + * Find a connection with unique identifier @con_id between @fwnode and another + * device node. @match will be used to convert the connection description to + * data the caller is expecting to be returned. + */ +void *fwnode_connection_find_match(struct fwnode_handle *fwnode, + const char *con_id, void *data, + devcon_match_fn_t match) +{ + void *ret; + + if (!fwnode || !match) + return NULL; + + ret = fwnode_graph_devcon_match(fwnode, con_id, data, match); + if (ret) + return ret; + + return fwnode_devcon_match(fwnode, con_id, data, match); +} +EXPORT_SYMBOL_GPL(fwnode_connection_find_match); -- cgit v1.2.3-59-g8ed1b