[PATCH 04/15] device property: Add fwnode_get_named_child_node()

Sakari Ailus
2017-01-27T16:08:11Z

From: Mika Westerberg <mika.westerberg@linux.intel.com>

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: Mika Westerberg <mika.westerberg@linux.intel.com>
---
drivers/base/property.c | 22 +++++++++++++++++-----
include/linux/property.h | 2 ++
2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/drivers/base/property.c b/drivers/base/property.c
index 15403f7..c0011cf 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -935,20 +935,20 @@ 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;
@@ -960,6 +960,18 @@ 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);

/**
diff --git a/include/linux/property.h b/include/linux/property.h
index a3d4f52..66530c3 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -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);

--
2.7.4