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: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/base/property.c b/drivers/base/property.c
index bc0f07a..538b248 100644 (file)
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -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);
 
 /**

diff --git a/include/linux/property.h b/include/linux/property.h
index f4786a8..514b195 100644 (file)
--- 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);