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 <m...@semihalf.com>
---
drivers/base/property.c | 26 ++++++++++++++++++++
include/linux/property.h | 6 +++++
2 files changed, 32 insertions(+)
diff --git a/drivers/base/property.c b/drivers/base/property.c
index 1d6c9d9..613ba82 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.
diff --git a/include/linux/property.h b/include/linux/property.h
index e05889f..5b0563a 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -83,11 +83,17 @@ struct fwnode_handle *fwnode_get_next_parent(
struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_get_next_child_node(
const struct fwnode_handle *fwnode, struct fwnode_handle *child);
+struct fwnode_handle *fwnode_get_next_available_child_node(
+ const struct fwnode_handle *fwnode, struct fwnode_handle *child);
#define fwnode_for_each_child_node(fwnode, child) \
for (child = fwnode_get_next_child_node(fwnode, NULL); child; \
child = fwnode_get_next_child_node(fwnode, child))
+#define fwnode_for_each_available_child_node(fwnode, child) \
+ for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\
+ child = fwnode_get_next_available_child_node(fwnode, child))
+
struct fwnode_handle *device_get_next_child_node(
struct device *dev, struct fwnode_handle *child);
--
2.7.4
