driver-core: Add device node pointer to struct device

Currently, platforms using CONFIG_OF add a 'struct device_node *of_node'
to dev->archdata.  However, with CONFIG_OF becoming generic for all
architectures, it makes sense for commonality to move it out of archdata
and into struct device proper.

This patch adds a struct device_node *of_node member to struct device
and updates all locations which currently write the device_node pointer
into archdata to also update dev->of_node.  Subsequent patches will
modify callers to use the archdata location and ultimately remove
the archdata member entirely.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
CC: Michal Simek <monstr@monstr.eu>
CC: Greg Kroah-Hartman <gregkh@suse.de>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: "David S. Miller" <davem@davemloft.net>
CC: Stephen Rothwell <sfr@canb.auug.org.au>
CC: Jeremy Kerr <jeremy.kerr@canonical.com>
CC: microblaze-uclinux@itee.uq.edu.au
CC: linux-kernel@vger.kernel.org
CC: linuxppc-dev@ozlabs.org
CC: sparclinux@vger.kernel.org

arch/microblaze/kernel/of_device.c

@@ -54,6 +54,7 @@ struct of_device *of_device_alloc(struct device_node *np,
 	dev->dev.parent = parent;
 	dev->dev.release = of_release_dev;
 	dev->dev.archdata.of_node = np;
+	dev->dev.of_node = np;
 
 	if (bus_id)
 		dev_set_name(&dev->dev, bus_id);

arch/powerpc/kernel/of_device.c

@@ -74,6 +74,7 @@ struct of_device *of_device_alloc(struct device_node *np,
 	dev->dev.parent = parent;
 	dev->dev.release = of_release_dev;
 	dev->dev.archdata.of_node = np;
+	dev->dev.of_node = np;
 
 	if (bus_id)
 		dev_set_name(&dev->dev, "%s", bus_id);

arch/powerpc/kernel/pci-common.c

@@ -1097,8 +1097,9 @@ void __devinit pcibios_setup_bus_devices(struct pci_bus *bus)
 		if (dev->is_added)
 			continue;
 
-		/* Setup OF node pointer in archdata */
+		/* Setup OF node pointer in the device */
 		sd->of_node = pci_device_to_OF_node(dev);
+		dev->dev.of_node = pci_device_to_OF_node(dev);
 
 		/* Fixup NUMA node as it may not be setup yet by the generic
 		 * code and is needed by the DMA init

arch/powerpc/kernel/vio.c

@@ -1230,7 +1230,8 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
 		if (unit_address != NULL)
 			viodev->unit_address = *unit_address;
 	}
-	viodev->dev.archdata.of_node = of_node_get(of_node);
+	viodev->dev.of_node = of_node_get(of_node);
+	viodev->dev.archdata.of_node = viodev->dev.of_node;
 
 	if (firmware_has_feature(FW_FEATURE_CMO))
 		vio_cmo_set_dma_ops(viodev);

arch/powerpc/platforms/ps3/system-bus.c

@@ -766,6 +766,7 @@ int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
 		BUG();
 	};
 
+	dev->core.of_node = NULL;
 	dev->core.archdata.of_node = NULL;
 	set_dev_node(&dev->core, 0);
 

arch/sparc/kernel/of_device_32.c

@@ -348,6 +348,7 @@ static struct of_device * __init scan_one_device(struct device_node *dp,
 	sd->prom_node = dp;
 	sd->op = op;
 
+	op->dev.of_node = dp;
 	op->node = dp;
 
 	op->clock_freq = of_getintprop_default(dp, "clock-frequency",

arch/sparc/kernel/of_device_64.c

@@ -643,6 +643,7 @@ static struct of_device * __init scan_one_device(struct device_node *dp,
 	sd->prom_node = dp;
 	sd->op = op;
 
+	op->dev.of_node = dp;
 	op->node = dp;
 
 	op->clock_freq = of_getintprop_default(dp, "clock-frequency",

arch/sparc/kernel/pci.c

@@ -262,6 +262,7 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
 	sd->stc = &pbm->stc;
 	sd->host_controller = pbm;
 	sd->prom_node = node;
+	dev->dev.of_node = node;
 	sd->op = op = of_find_device_by_node(node);
 	sd->numa_node = pbm->numa_node;
 

drivers/of/of_mdio.c

@@ -80,6 +80,7 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
 		 * can be looked up later */
 		of_node_get(child);
 		dev_archdata_set_node(&phy->dev.archdata, child);
+		phy->dev.of_node = child;
 
 		/* All data is now stored in the phy struct; register it */
 		rc = phy_device_register(phy);

drivers/of/of_spi.c

@@ -79,6 +79,7 @@ void of_register_spi_devices(struct spi_master *master, struct device_node *np)
 
 		/* Store a pointer to the node in the device structure */
 		of_node_get(nc);
+		spi->dev.of_node = nc;
 		spi->dev.archdata.of_node = nc;
 
 		/* Register the new device */

include/linux/device.h

@@ -34,6 +34,7 @@ struct class;
 struct class_private;
 struct bus_type;
 struct bus_type_private;
+struct device_node;
 
 struct bus_attribute {
 	struct attribute	attr;
@@ -433,6 +434,9 @@ struct device {
 					     override */
 	/* arch specific additions */
 	struct dev_archdata	archdata;
+#ifdef CONFIG_OF
+	struct device_node	*of_node;
+#endif
 
 	dev_t			devt;	/* dev_t, creates the sysfs "dev" */