Merge branch 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6

* 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6:
  dt: add empty of_machine_is_compatible
  ahci: add DT binding for Calxeda AHCI controller
  dt/platform: minor cleanup
  dt: add empty of_alias_get_id() for non-dt builds

Documentation/devicetree/bindings/ata/calxeda-sata.txt

+* Calxeda SATA Controller
+
+SATA nodes are defined to describe on-chip Serial ATA controllers.
+Each SATA controller should have its own node.
+
+Required properties:
+- compatible        : compatible list, contains "calxeda,hb-ahci"
+- interrupts        : <interrupt mapping for SATA IRQ>
+- reg               : <registers mapping>
+
+Example:
+        sata@ffe08000 {
+		compatible = "calxeda,hb-ahci";
+                reg = <0xffe08000 0x1000>;
+                interrupts = <115>;
+        };
+

drivers/ata/ahci_platform.c

@@ -202,11 +202,18 @@ static int __devexit ahci_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct of_device_id ahci_of_match[] = {
+	{ .compatible = "calxeda,hb-ahci", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ahci_of_match);
+
 static struct platform_driver ahci_driver = {
 	.remove = __devexit_p(ahci_remove),
 	.driver = {
 		.name = "ahci",
 		.owner = THIS_MODULE,
+		.of_match_table = ahci_of_match,
 	},
 	.id_table	= ahci_devtype,
 };

drivers/of/platform.c

@@ -310,7 +310,10 @@ static const struct of_dev_auxdata *of_dev_lookup(const struct of_dev_auxdata *l
 				 struct device_node *np)
 {
 	struct resource res;
-	if (lookup) {
+
+	if (!lookup)
+		return NULL;
+
 	for(; lookup->name != NULL; lookup++) {
 		if (!of_device_is_compatible(np, lookup->compatible))
 			continue;
@@ -321,7 +324,7 @@ static const struct of_dev_auxdata *of_dev_lookup(const struct of_dev_auxdata *l
 		pr_debug("%s: devname=%s\n", np->full_name, lookup->name);
 		return lookup;
 	}
-	}
+
 	return NULL;
 }
 
@@ -329,8 +332,9 @@ static const struct of_dev_auxdata *of_dev_lookup(const struct of_dev_auxdata *l
  * of_platform_bus_create() - Create a device for a node and its children.
  * @bus: device node of the bus to instantiate
  * @matches: match table for bus nodes
- * disallow recursive creation of child buses
+ * @lookup: auxdata table for matching id and platform_data with device nodes
  * @parent: parent for new device, or NULL for top level.
+ * @strict: require compatible property
  *
  * Creates a platform_device for the provided device_node, and optionally
  * recursively create devices for all the child nodes.

include/linux/of.h

@@ -321,6 +321,16 @@ static inline struct device_node *of_parse_phandle(struct device_node *np,
 	return NULL;
 }
 
+static inline int of_alias_get_id(struct device_node *np, const char *stem)
+{
+	return -ENOSYS;
+}
+
+static inline int of_machine_is_compatible(const char *compat)
+{
+	return 0;
+}
+
 #define of_match_ptr(_ptr)	NULL
 #define of_match_node(_matches, _node)	NULL
 #endif /* CONFIG_OF */