2 files changed, 60 insertions, 0 deletions

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);
+                }
+        }
+}