diff options
| -rw-r--r-- | arch/powerpc/sysdev/mmio_nvram.c | 40 |
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; |