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authorMarcin Wojtas <mw@semihalf.com>2018-01-18 13:31:41 +0100
committerDavid S. Miller <davem@davemloft.net>2018-01-22 10:57:04 -0500
commit3395de96ae5998692bd86024d0d5e4dd55cd6cc3 (patch)
treec870b2a027636e19c4143a928b3913b86eb52185 /drivers/base
parent7c6c57f2ab2c5113844fe187a7c45c4bd76dc671 (diff)
device property: Allow iterating over available child fwnodes
Implement a new helper function fwnode_get_next_available_child_node(), which enables obtaining next enabled child fwnode, which works on a similar basis to OF's of_get_next_available_child(). This commit also introduces a macro, thanks to which it is possible to iterate over the available fwnodes, using the new function described above. Signed-off-by: Marcin Wojtas <mw@semihalf.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/property.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c
index 1d6c9d99d72f..613ba820f545 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -998,6 +998,32 @@ fwnode_get_next_child_node(const struct fwnode_handle *fwnode,
EXPORT_SYMBOL_GPL(fwnode_get_next_child_node);
/**
+ * fwnode_get_next_available_child_node - Return the next
+ * available child node handle for a node
+ * @fwnode: Firmware node to find the next child node for.
+ * @child: Handle to one of the node's child nodes or a %NULL handle.
+ */
+struct fwnode_handle *
+fwnode_get_next_available_child_node(const struct fwnode_handle *fwnode,
+ struct fwnode_handle *child)
+{
+ struct fwnode_handle *next_child = child;
+
+ if (!fwnode)
+ return NULL;
+
+ do {
+ next_child = fwnode_get_next_child_node(fwnode, next_child);
+
+ if (!next_child || fwnode_device_is_available(next_child))
+ break;
+ } while (next_child);
+
+ return next_child;
+}
+EXPORT_SYMBOL_GPL(fwnode_get_next_available_child_node);
+
+/**
* device_get_next_child_node - Return the next child node handle for a device
* @dev: Device to find the next child node for.
* @child: Handle to one of the device's child nodes or a null handle.

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