From: Prashant Malani <pmalani@xxxxxxxxxxxx> When searching the device graph for device matches, check the remote-endpoint itself for a match. Some drivers register devices for individual endpoints. This allows the matcher code to evaluate those for a match too, instead of only looking at the remote parent devices. This is required when a device supports two mode switches in its endpoints, so we can't simply register the mode switch with the parent node. Signed-off-by: Prashant Malani <pmalani@xxxxxxxxxxxx> Signed-off-by: Pin-yen Lin <treapking@xxxxxxxxxxxx> --- Changes in v13: - Update the kernel doc of fwnode_connection_find_match Changes in v12: - Check the availability of the device node in fwnode_graph_devcon_matches - Ensured valid access to "matches" in fwnode_graph_devcon_matches - Updated the documentation in fwnode_connection_find_match(es) - Dropped collected tags due to the new changes Changes in v11: - Added missing fwnode_handle_put in drivers/base/property.c Changes in v10: - Collected Reviewed-by and Tested-by tags Changes in v6: - New in v6 drivers/base/property.c | 31 ++++++++++++++++++++++++++----- 1 file changed, 26 insertions(+), 5 deletions(-) diff --git a/drivers/base/property.c b/drivers/base/property.c index 083a95791d3b..4426ac2b16ca 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1243,6 +1243,23 @@ static unsigned int fwnode_graph_devcon_matches(const struct fwnode_handle *fwno continue; } + ret = match(node, con_id, data); + fwnode_handle_put(node); + if (ret) { + if (matches) + matches[count] = ret; + count++; + + if (matches && count >= matches_len) + break; + } + + /* + * Some drivers may register devices for endpoints. Check + * the remote-endpoints for matches in addition to the remote + * port parent. + */ + node = fwnode_graph_get_remote_endpoint(ep); ret = match(node, con_id, data); fwnode_handle_put(node); if (ret) { @@ -1293,8 +1310,11 @@ static unsigned int fwnode_devcon_matches(const struct fwnode_handle *fwnode, * @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. + * device node. For fwnode graph connections, the graph endpoints are also + * checked. @match will be used to convert the connection description to data + * the caller is expecting to be returned. + * + * Return: The pointer to the matched node, or NULL on error. */ void *fwnode_connection_find_match(const struct fwnode_handle *fwnode, const char *con_id, void *data, @@ -1325,9 +1345,10 @@ EXPORT_SYMBOL_GPL(fwnode_connection_find_match); * @matches_len: Length of @matches * * Find up to @matches_len connections with unique identifier @con_id between - * @fwnode and other device nodes. @match will be used to convert the - * connection description to data the caller is expecting to be returned - * through the @matches array. + * @fwnode and other device nodes. For fwnode graph connections, the graph + * endpoints are also checked. @match will be used to convert the connection + * description to data the caller is expecting to be returned through the + * @matches array. * If @matches is NULL @matches_len is ignored and the total number of resolved * matches is returned. * -- 2.40.0.rc0.216.gc4246ad0f0-goog