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| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2017-06-06 12:37:40 +0300 |
|---|---|---|
| committer | Tao Huang <huangtao@rock-chips.com> | 2017-11-27 14:12:20 +0800 |
| commit | c1aa3cab9b3b518b250b298ea5800a692eae0654 (patch) | |
| tree | 2b9827dc13ece898a163a98293e6f4eb3aedac8b /drivers/base | |
| parent | fe88941ff6cd5bcae20b05697c20b3fea269744f (diff) | |
UPSTREAM: device property: Add FW type agnostic fwnode_graph_get_remote_node
Add fwnode_graph_get_remote_node() function which is equivalent to
of_graph_get_remote_node() on OF.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit 125ee6b3b0fa920c730b0991e6f083a9f5b1e4c3)
Signed-off-by: Brian J Lovin <brian.j.lovin@intel.com>
BUG=b:64133998
TEST=media device topology shows subdevs registered successfully
TEST=no camera regression
Change-Id: Ic450222819fb987342af9170872b91b0044a181f
Reviewed-on: https://chromium-review.googlesource.com/693679
Commit-Ready: Tomasz Figa <tfiga@chromium.org>
Tested-by: Hyungwoo Yang <hyungwoo.yang@intel.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
Diffstat (limited to 'drivers/base')
| -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 468efbd97c68..803b878b66f0 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1143,6 +1143,43 @@ 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 |