From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Tue, 28 Mar 2017 07:52:19 +0000 (+0300)
Subject: device property: Add fwnode_get_named_child_node()
X-Git-Tag: v4.14-rc1~1058^2~12
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=21ea73f54c6d77f35381c79870160496c9e78b60;p=platform%2Fkernel%2Flinux-rpi.git

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
--- 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 f4786a86..514b195 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);