diff options
Diffstat (limited to 'arch/sparc')
| -rw-r--r-- | arch/sparc/kernel/of_device.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/arch/sparc/kernel/of_device.c b/arch/sparc/kernel/of_device.c index c590148..4ef1607 100644 --- a/arch/sparc/kernel/of_device.c +++ b/arch/sparc/kernel/of_device.c @@ -344,6 +344,27 @@ static int __init build_one_resource(struct device_node *parent, return 1; } +static int __init use_1to1_mapping(struct device_node *pp) +{ + /* If we have a ranges property in the parent, use it. */ + if (of_find_property(pp, "ranges", NULL) != NULL) + return 0; + + /* Some SBUS devices use intermediate nodes to express + * hierarchy within the device itself. These aren't + * real bus nodes, and don't have a 'ranges' property. + * But, we should still pass the translation work up + * to the SBUS itself. + */ + if (!strcmp(pp->name, "dma") || + !strcmp(pp->name, "espdma") || + !strcmp(pp->name, "ledma") || + !strcmp(pp->name, "lebuffer")) + return 0; + + return 1; +} + static int of_resource_verbose; static void __init build_device_resources(struct of_device *op, @@ -389,10 +410,7 @@ static void __init build_device_resources(struct of_device *op, memcpy(addr, reg, na * 4); - /* If the immediate parent has no ranges property to apply, - * just use a 1<->1 mapping. - */ - if (of_find_property(pp, "ranges", NULL) == NULL) { + if (use_1to1_mapping(pp)) { result = of_read_addr(addr, na); goto build_res; } |