linux-kernel - [RFC 4/4] OF: Add device pointer to struct device

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Date:	Fri, 16 Aug 2013 22:39:23 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Grant Likely <grant.likely@...aro.org>
Cc:	Rob Herring <rob.herring@...xeda.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Hiroshi Doyu <hdoyu@...dia.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC 4/4] OF: Add device pointer to struct device_node

Signed-off-by: Thierry Reding <treding@...dia.com>
---
 drivers/of/device.c   |  2 ++
 drivers/of/platform.c | 10 +---------
 include/linux/of.h    |  2 ++
 3 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/of/device.c b/drivers/of/device.c
index f685e55..8f8e715 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -63,6 +63,8 @@ int of_device_add(struct platform_device *ofdev)
 	if (!ofdev->dev.parent)
 		set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));
 
+	ofdev->dev.of_node->dev = &ofdev->dev;
+
 	return device_add(&ofdev->dev);
 }
 
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index b0d1ff8..0ae68bd 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -31,11 +31,6 @@ const struct of_device_id of_default_bus_match_table[] = {
 	{} /* Empty terminated list */
 };
 
-static int of_dev_node_match(struct device *dev, void *data)
-{
-	return dev->of_node == data;
-}
-
 /**
  * of_find_device_by_node - Find the platform_device associated with a node
  * @np: Pointer to device tree node
@@ -44,10 +39,7 @@ static int of_dev_node_match(struct device *dev, void *data)
  */
 struct platform_device *of_find_device_by_node(struct device_node *np)
 {
-	struct device *dev;
-
-	dev = bus_find_device(&platform_bus_type, NULL, np, of_dev_node_match);
-	return dev ? to_platform_device(dev) : NULL;
+	return np->dev ? to_platform_device(np->dev) : NULL;
 }
 EXPORT_SYMBOL(of_find_device_by_node);
 
diff --git a/include/linux/of.h b/include/linux/of.h
index 17ce8a6..e583a6d 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -65,6 +65,8 @@ struct device_node {
 	unsigned int unique_id;
 	struct of_irq_controller *irq_trans;
 #endif
+
+	struct device *dev;
 };
 
 #define MAX_PHANDLE_ARGS 8
-- 
1.8.3.4

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