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Commit 21ea73f5 authored by Mika Westerberg's avatar Mika Westerberg Committed by Rafael J. Wysocki
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device property: Add fwnode_get_named_child_node() 



Since now we have means to enumerate all children of any fwnode even in
ACPI we can implement fwnode_get_named_child_node(). This is similar than
device_get_named_child_node() with the exception that it can be called to
any fwnode handle. Make device_get_named_child_node() call directly this
new function.

This is useful in cases where we need to be able to find child nodes which
are not direct descendants of the parent device.

Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 34055190

drivers/base/property.c

+17 −5
Original line number Diff line number Diff line
@@ -1000,20 +1000,20 @@ struct fwnode_handle *device_get_next_child_node(struct device *dev, 
EXPORT_SYMBOL_GPL(device_get_next_child_node);



/**

 * device_get_named_child_node - Return first matching named child node handle

 * @dev: Device to find the named child node for.

 * fwnode_get_named_child_node - Return first matching named child node handle

 * @fwnode: Firmware node to find the named child node for.

 * @childname: String to match child node name against.

 */

struct fwnode_handle *device_get_named_child_node(struct device *dev,

struct fwnode_handle *fwnode_get_named_child_node(struct fwnode_handle *fwnode,

						  const char *childname)

{

	struct fwnode_handle *child;



	/*

	 * Find first matching named child node of this device.

	 * Find first matching named child node of this fwnode.

	 * For ACPI this will be a data only sub-node.

	 */

	device_for_each_child_node(dev, child) {

	fwnode_for_each_child_node(fwnode, child) {

		if (is_of_node(child)) {

			if (!of_node_cmp(to_of_node(child)->name, childname))

				return child;
@@ -1025,6 +1025,18 @@ struct fwnode_handle *device_get_named_child_node(struct device *dev, 


	return NULL;

}

EXPORT_SYMBOL_GPL(fwnode_get_named_child_node);



/**

 * device_get_named_child_node - Return first matching named child node handle

 * @dev: Device to find the named child node for.

 * @childname: String to match child node name against.

 */

struct fwnode_handle *device_get_named_child_node(struct device *dev,

						  const char *childname)

{

	return fwnode_get_named_child_node(dev_fwnode(dev), childname);

}

EXPORT_SYMBOL_GPL(device_get_named_child_node);



/**

include/linux/property.h

+2 −0
Original line number Diff line number Diff line
@@ -85,6 +85,8 @@ struct fwnode_handle *device_get_next_child_node(struct device *dev, 
	for (child = device_get_next_child_node(dev, NULL); child;	\

	     child = device_get_next_child_node(dev, child))



struct fwnode_handle *fwnode_get_named_child_node(struct fwnode_handle *fwnode,

						  const char *childname);

struct fwnode_handle *device_get_named_child_node(struct device *dev,

						  const char *childname);