linux-kernel - [PATCH 4/7] device property: introduce fwnode_get_named_child

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Date:   Tue, 24 Jan 2017 16:06:38 -0800
From:   Furquan Shaikh <furquan@...omium.org>
To:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Mark Brown <broonie@...nel.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Tony Lindgren <tony@...mide.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Len Brown <lenb@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Hanjun Guo <hanjun.guo@...aro.org>,
        Will Deacon <will.deacon@....com>,
        Rob Herring <robh@...nel.org>,
        Sathyanarayana Nujella <sathyanarayana.nujella@...el.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Adam Thomson <Adam.Thomson.Opensource@...semi.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-gpio@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        Dmitry Torokhov <dtor@...omium.org>,
        Furquan Shaikh <furquan@...omium.org>
Subject: [PATCH 4/7] device property: introduce fwnode_get_named_child_node()

From: Dmitry Torokhov <dtor@...omium.org>

Generic code that works with ACPI, device tree, and pset properties may
want to fetch named child node of fwnode_handle.

Signed-off-by: Dmitry Torokhov <dtor@...omium.org>
Signed-off-by: Furquan Shaikh <furquan@...omium.org>
---
 drivers/base/property.c | 45 +++++++++++++++++++++++++++++----------------
 include/linux/fwnode.h  |  3 +++
 2 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/drivers/base/property.c b/drivers/base/property.c
index fbb05a4a7595..3556c9fbdbf7 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -889,23 +889,11 @@ struct fwnode_handle *fwnode_get_next_child_node(struct fwnode_handle *node,
 EXPORT_SYMBOL_GPL(fwnode_get_next_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.
- */
-struct fwnode_handle *device_get_next_child_node(struct device *dev,
-						 struct fwnode_handle *child)
-{
-	return fwnode_get_next_child_node(dev_fwnode(dev), child);
-}
-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
+ * @node: 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 *node,
 						  const char *childname)
 {
 	struct fwnode_handle *child;
@@ -914,7 +902,7 @@ struct fwnode_handle *device_get_named_child_node(struct device *dev,
 	 * Find first matching named child node of this device.
 	 * For ACPI this will be a data only sub-node.
 	 */
-	device_for_each_child_node(dev, child) {
+	fwnode_for_each_child_node(node, child) {
 		if (is_of_node(child)) {
 			if (!of_node_cmp(to_of_node(child)->name, childname))
 				return child;
@@ -926,6 +914,31 @@ struct fwnode_handle *device_get_named_child_node(struct device *dev,
 
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(fwnode_get_named_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.
+ */
+struct fwnode_handle *device_get_next_child_node(struct device *dev,
+						 struct fwnode_handle *child)
+{
+	return fwnode_get_next_child_node(dev_fwnode(dev), child);
+}
+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.
+ * @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/fwnode.h b/include/linux/fwnode.h
index b4efe2a088ae..d501e0b967bd 100644
--- a/include/linux/fwnode.h
+++ b/include/linux/fwnode.h
@@ -34,4 +34,7 @@ struct fwnode_handle *fwnode_get_next_child_node(struct fwnode_handle *node,
 	for (child = fwnode_get_next_child_node(node, NULL); child; \
 	     child = fwnode_get_next_child_node(node, child))
 
+struct fwnode_handle *fwnode_get_named_child_node(struct fwnode_handle *node,
+						  const char *childname);
+
 #endif
-- 
2.11.0.483.g087da7b7c-goog