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UPSTREAM: device property: Add fwnode_graph_get_port_parent

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Provide a helper to obtain the parent device fwnode without first
parsing the remote-endpoint as per fwnode_graph_get_remote_port_parent.

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
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 6a71d8d777)
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: I58c0cfd2759aa62ada3d54cfb77f449ff8a0abc3
Reviewed-on: https://chromium-review.googlesource.com/693680
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>
This commit is contained in:
Kieran Bingham
2017-06-06 12:37:41 +03:00
committed by Tao Huang
parent c1aa3cab9b
commit c36f8b2d07
2 changed files with 26 additions and 4 deletions
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28
drivers/base/property.c
View File

@@ -1097,6 +1097,26 @@ fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode,
}
EXPORT_SYMBOL_GPL(fwnode_graph_get_next_endpoint);
/**
* fwnode_graph_get_port_parent - Return the device fwnode of a port endpoint
* @endpoint: Endpoint firmware node of the port
*
* Return: the firmware node of the device the @endpoint belongs to.
*/
struct fwnode_handle *
fwnode_graph_get_port_parent(struct fwnode_handle *endpoint)
{
struct fwnode_handle *port, *parent;
port = fwnode_get_parent(endpoint);
parent = fwnode_call_ptr_op(port, graph_get_port_parent);
fwnode_handle_put(port);
return parent;
}
EXPORT_SYMBOL_GPL(fwnode_graph_get_port_parent);
/**
* fwnode_graph_get_remote_port_parent - Return fwnode of a remote device
* @fwnode: Endpoint firmware node pointing to the remote endpoint
@@ -1106,12 +1126,12 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_next_endpoint);
struct fwnode_handle *
fwnode_graph_get_remote_port_parent(struct fwnode_handle *fwnode)
{
struct fwnode_handle *port, *parent;
struct fwnode_handle *endpoint, *parent;
port = fwnode_graph_get_remote_port(fwnode);
parent = fwnode_call_ptr_op(port, graph_get_port_parent);
endpoint = fwnode_graph_get_remote_endpoint(fwnode);
parent = fwnode_graph_get_port_parent(endpoint);
fwnode_handle_put(port);
fwnode_handle_put(endpoint);
return parent;
}

2
include/linux/property.h
View File

@@ -216,6 +216,8 @@ void *device_get_mac_address(struct device *dev, char *addr, int alen);
struct fwnode_handle *fwnode_graph_get_next_endpoint(
struct fwnode_handle *fwnode, struct fwnode_handle *prev);
struct fwnode_handle *
fwnode_graph_get_port_parent(struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_graph_get_remote_port_parent(
struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_graph_get_remote_port(