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path: root/arch/powerpc/sysdev/mmio_nvram.c
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Diffstat (limited to 'arch/powerpc/sysdev/mmio_nvram.c')
-rw-r--r--arch/powerpc/sysdev/mmio_nvram.c40
1 files changed, 23 insertions, 17 deletions
diff --git a/arch/powerpc/sysdev/mmio_nvram.c b/arch/powerpc/sysdev/mmio_nvram.c
index ff23f5a4d4b..e073e246293 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;