diff --git a/arch/powerpc/boot/dts/ebony.dts b/arch/powerpc/boot/dts/ebony.dts
index f8790c4747df..7aad135a44b0 100644
--- a/arch/powerpc/boot/dts/ebony.dts
+++ b/arch/powerpc/boot/dts/ebony.dts
@@ -158,9 +158,10 @@
 					};
 				};
 
-				ds1743@1,0 {
+				nvram@1,0 {
 					/* NVRAM & RTC */
-					compatible = "ds1743";
+					compatible = "ds1743-nvram";
+					#bytes = <2000>;
 					reg = <1 0 2000>;
 				};
 
diff --git a/arch/powerpc/boot/dts/walnut.dts b/arch/powerpc/boot/dts/walnut.dts
index 0e3825e599dc..dcc21b0438e5 100644
--- a/arch/powerpc/boot/dts/walnut.dts
+++ b/arch/powerpc/boot/dts/walnut.dts
@@ -175,9 +175,10 @@
 				};
 			};
 
-			ds1743@1,0 {
+			nvram@1,0 {
 				/* NVRAM and RTC */
-				compatible = "ds1743";
+				compatible = "ds1743-nvram";
+				#bytes = <2000>;
 				reg = <1 0 2000>;
 			};
 
diff --git a/arch/powerpc/platforms/40x/walnut.c b/arch/powerpc/platforms/40x/walnut.c
index f115b6dbf5ad..5d9edd917f92 100644
--- a/arch/powerpc/platforms/40x/walnut.c
+++ b/arch/powerpc/platforms/40x/walnut.c
@@ -36,6 +36,7 @@ static __initdata struct of_device_id walnut_of_bus[] = {
 static int __init walnut_device_probe(void)
 {
 	of_platform_bus_probe(NULL, walnut_of_bus, NULL);
+	of_instantiate_rtc();
 
 	return 0;
 }
diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
index d24801305344..c3e4e8c3c467 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -13,6 +13,7 @@ config EBONY
 	default y
 	select 440GP
 	select PCI
+	select OF_RTC
 	help
 	  This option enables support for the IBM PPC440GP evaluation board.
 
diff --git a/arch/powerpc/platforms/44x/ebony.c b/arch/powerpc/platforms/44x/ebony.c
index 481a016e1535..1a8d467bff85 100644
--- a/arch/powerpc/platforms/44x/ebony.c
+++ b/arch/powerpc/platforms/44x/ebony.c
@@ -18,6 +18,7 @@
 
 #include <linux/init.h>
 #include <linux/of_platform.h>
+#include <linux/rtc.h>
 
 #include <asm/machdep.h>
 #include <asm/prom.h>
@@ -38,6 +39,7 @@ static __initdata struct of_device_id ebony_of_bus[] = {
 static int __init ebony_device_probe(void)
 {
 	of_platform_bus_probe(NULL, ebony_of_bus, NULL);
+	of_instantiate_rtc();
 
 	return 0;
 }
diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index 2cec34314d2e..4286664741dd 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -321,6 +321,12 @@ config FSL_ULI1575
 config CPM
 	bool
 
+config OF_RTC
+	bool
+	help
+	  Uses information from the OF or flattened device tree to instatiate
+	  platform devices for direct mapped RTC chips like the DS1742 or DS1743.
+
 source "arch/powerpc/sysdev/bestcomm/Kconfig"
 
 endmenu
diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index f17e7b885f60..702916bf28fa 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_PPC_I8259)		+= i8259.o
 obj-$(CONFIG_IPIC)		+= ipic.o
 obj-$(CONFIG_4xx)		+= uic.o
 obj-$(CONFIG_XILINX_VIRTEX)	+= xilinx_intc.o
+obj-$(CONFIG_OF_RTC)		+= of_rtc.o
 ifeq ($(CONFIG_PCI),y)
 obj-$(CONFIG_4xx)		+= ppc4xx_pci.o
 endif
diff --git a/arch/powerpc/sysdev/of_rtc.c b/arch/powerpc/sysdev/of_rtc.c
new file mode 100644
index 000000000000..3d54450640c1
--- /dev/null
+++ b/arch/powerpc/sysdev/of_rtc.c
@@ -0,0 +1,59 @@
+/*
+ * Instantiate mmio-mapped RTC chips based on device tree information
+ *
+ * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/init.h>
+#include <linux/of_platform.h>
+
+static __initdata struct {
+	const char *compatible;
+	char *plat_name;
+} of_rtc_table[] = {
+	{ "ds1743-nvram", "rtc-ds1742" },
+};
+
+void __init of_instantiate_rtc(void)
+{
+	struct device_node *node;
+	int err;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(of_rtc_table); i++) {
+		char *plat_name = of_rtc_table[i].plat_name;
+
+		for_each_compatible_node(node, NULL,
+					 of_rtc_table[i].compatible) {
+			struct resource *res;
+
+			res = kmalloc(sizeof(*res), GFP_KERNEL);
+			if (!res) {
+				printk(KERN_ERR "OF RTC: Out of memory "
+				       "allocating resource structure for %s\n",
+				       node->full_name);
+				continue;
+			}
+
+			err = of_address_to_resource(node, 0, res);
+			if (err) {
+				printk(KERN_ERR "OF RTC: Error "
+				       "translating resources for %s\n",
+				       node->full_name);
+				continue;
+			}
+
+			printk(KERN_INFO "OF_RTC: %s is a %s @ 0x%llx-0x%llx\n",
+			       node->full_name, plat_name,
+			       (unsigned long long)res->start,
+			       (unsigned long long)res->end);
+			platform_device_register_simple(plat_name, -1, res, 1);
+		}
+	}
+}
diff --git a/include/asm-powerpc/of_platform.h b/include/asm-powerpc/of_platform.h
index 1bce5efe1de0..18659ef72139 100644
--- a/include/asm-powerpc/of_platform.h
+++ b/include/asm-powerpc/of_platform.h
@@ -37,4 +37,6 @@ extern int of_platform_bus_probe(struct device_node *root,
 
 extern struct of_device *of_find_device_by_phandle(phandle ph);
 
+extern void of_instantiate_rtc(void);
+
 #endif	/* _ASM_POWERPC_OF_PLATFORM_H */