1 files changed, 23 insertions, 17 deletions

diff --git a/arch/powerpc/sysdev/mmio_nvram.c b/arch/powerpc/sysdev/mmio_nvram.c
index ff23f5a4d4b9..e073e246293d 100644
--- a/arch/powerpc/sysdev/mmio_nvram.c
+++ b/arch/powerpc/sysdev/mmio_nvram.c
@@ -80,33 +80,39 @@ static ssize_t mmio_nvram_get_size(void)
 int __init mmio_nvram_init(void)
 {
         struct device_node *nvram_node;
-        const unsigned long *buffer;
-        int proplen;
         unsigned long nvram_addr;
+        struct resource r;
         int ret;
 
-        ret = -ENODEV;
         nvram_node = of_find_node_by_type(NULL, "nvram");
-        if (!nvram_node)
+        if (!nvram_node) {
+                printk(KERN_WARNING "nvram: no node found in device-tree\n");
+                return -ENODEV;
+        }
+
+        ret = of_address_to_resource(nvram_node, 0, &r);
+        if (ret) {
+                printk(KERN_WARNING "nvram: failed to get address (err %d)\n",
+                       ret);
                 goto out;
-
-        ret = -EIO;
-        buffer = get_property(nvram_node, "reg", &proplen);
-        if (proplen != 2*sizeof(unsigned long))
-                goto out;
-
-        ret = -ENODEV;
-        nvram_addr = buffer[0];
-        mmio_nvram_len = buffer[1];
-        if ( (!mmio_nvram_len) || (!nvram_addr) )
+        }
+        nvram_addr = r.start;
+        mmio_nvram_len = r.end - r.start + 1;
+        if ( (!mmio_nvram_len) || (!nvram_addr) ) {
+                printk(KERN_WARNING "nvram: address or lenght is 0\n");
+                ret = -EIO;
                 goto out;
+        }
 
         mmio_nvram_start = ioremap(nvram_addr, mmio_nvram_len);
-        if (!mmio_nvram_start)
+        if (!mmio_nvram_start) {
+                printk(KERN_WARNING "nvram: failed to ioremap\n");
+                ret = -ENOMEM;
                 goto out;
+        }
 
-        printk(KERN_INFO "mmio NVRAM, %luk mapped to %p\n",
-               mmio_nvram_len >> 10, mmio_nvram_start);
+        printk(KERN_INFO "mmio NVRAM, %luk at 0x%lx mapped to %p\n",
+               mmio_nvram_len >> 10, nvram_addr, mmio_nvram_start);
 
         ppc_md.nvram_read       = mmio_nvram_read;
         ppc_md.nvram_write      = mmio_nvram_write;