Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Introduce pci_map_biosrom()
  x86, olpc: Use device tree for platform identification

arch/x86/platform/olpc/Makefile

@@ -1,4 +1,2 @@
-obj-$(CONFIG_OLPC)		+= olpc.o
+obj-$(CONFIG_OLPC)		+= olpc.o olpc_ofw.o olpc_dt.o
 obj-$(CONFIG_OLPC_XO1)		+= olpc-xo1.o
-obj-$(CONFIG_OLPC)		+= olpc_ofw.o
-obj-$(CONFIG_OF_PROMTREE)	+= olpc_dt.o

arch/x86/platform/olpc/olpc.c

@@ -18,6 +18,7 @@
 #include <linux/io.h>
 #include <linux/string.h>
 #include <linux/platform_device.h>
+#include <linux/of.h>
 
 #include <asm/geode.h>
 #include <asm/setup.h>
@@ -187,41 +188,43 @@ err:
 }
 EXPORT_SYMBOL_GPL(olpc_ec_cmd);
 
-static bool __init check_ofw_architecture(void)
+static bool __init check_ofw_architecture(struct device_node *root)
 {
-	size_t propsize;
-	char olpc_arch[5];
-	const void *args[] = { NULL, "architecture", olpc_arch, (void *)5 };
-	void *res[] = { &propsize };
+	const char *olpc_arch;
+	int propsize;
 
-	if (olpc_ofw("getprop", args, res)) {
-		printk(KERN_ERR "ofw: getprop call failed!\n");
-		return false;
-	}
+	olpc_arch = of_get_property(root, "architecture", &propsize);
 	return propsize == 5 && strncmp("OLPC", olpc_arch, 5) == 0;
 }
 
-static u32 __init get_board_revision(void)
+static u32 __init get_board_revision(struct device_node *root)
 {
-	size_t propsize;
-	__be32 rev;
-	const void *args[] = { NULL, "board-revision-int", &rev, (void *)4 };
-	void *res[] = { &propsize };
+	int propsize;
+	const __be32 *rev;
 
-	if (olpc_ofw("getprop", args, res) || propsize != 4) {
-		printk(KERN_ERR "ofw: getprop call failed!\n");
-		return cpu_to_be32(0);
-	}
-	return be32_to_cpu(rev);
+	rev = of_get_property(root, "board-revision-int", &propsize);
+	if (propsize != 4)
+		return 0;
+
+	return be32_to_cpu(*rev);
 }
 
 static bool __init platform_detect(void)
 {
-	if (!check_ofw_architecture())
+	struct device_node *root = of_find_node_by_path("/");
+	bool success;
+
+	if (!root)
 		return false;
-	olpc_platform_info.flags |= OLPC_F_PRESENT;
-	olpc_platform_info.boardrev = get_board_revision();
-	return true;
+
+	success = check_ofw_architecture(root);
+	if (success) {
+		olpc_platform_info.boardrev = get_board_revision(root);
+		olpc_platform_info.flags |= OLPC_F_PRESENT;
+	}
+
+	of_node_put(root);
+	return success;
 }
 
 static int __init add_xo1_platform_devices(void)

arch/x86/platform/olpc/olpc_dt.c

@@ -19,7 +19,9 @@
 #include <linux/kernel.h>
 #include <linux/bootmem.h>
 #include <linux/of.h>
+#include <linux/of_platform.h>
 #include <linux/of_pdt.h>
+#include <asm/olpc.h>
 #include <asm/olpc_ofw.h>
 
 static phandle __init olpc_dt_getsibling(phandle node)
@@ -180,3 +182,20 @@ void __init olpc_dt_build_devicetree(void)
 	pr_info("PROM DT: Built device tree with %u bytes of memory.\n",
 			prom_early_allocated);
 }
+
+/* A list of DT node/bus matches that we want to expose as platform devices */
+static struct of_device_id __initdata of_ids[] = {
+	{ .compatible = "olpc,xo1-battery" },
+	{ .compatible = "olpc,xo1-dcon" },
+	{ .compatible = "olpc,xo1-rtc" },
+	{},
+};
+
+static int __init olpc_create_platform_devices(void)
+{
+	if (machine_is_olpc())
+		return of_platform_bus_probe(NULL, of_ids, NULL);
+	else
+		return 0;
+}
+device_initcall(olpc_create_platform_devices);