From 6984ee797a8798128e94ab2447c8ed91f0156eb5 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Thu, 11 Jan 2007 16:08:41 +1100 Subject: [POWERPC] Fix cell's mmio nvram to properly parse device tree The mmio nvram driver (used by cell only atm) isn't properly parsing the device-tree, meaning that nvram isn't found correctly on the new Cell blades. It works ok for old blades where the nvram is at the root of the device tree but fails on Malta and CAB when it's hanging off axon. This fixes it by using the proper OF parsing functions. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- arch/powerpc/sysdev/mmio_nvram.c | 40 +++++++++++++++++++++++----------------- 1 file changed, 23 insertions(+), 17 deletions(-) (limited to 'arch') 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; -- cgit v1.2.3