aboutsummaryrefslogtreecommitdiff
path: root/arch/sparc/kernel/of_device.c
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2008-09-03 02:04:41 -0700
committerDavid S. Miller <davem@davemloft.net>2008-09-03 02:05:19 -0700
commit5280267c1dddb8d413595b87dc406624bb497946 (patch)
tree541701a1c15d17b7b5535beebd8e4f258d31395c /arch/sparc/kernel/of_device.c
parent9723f38eb53eac9a851210b629555a37afa3f15c (diff)
sparc: Fix handling of LANCE and ESP parent nodes in of_device.c
The device nodes that sit above 'esp' and 'le' on SBUS lack a 'ranges' property, but we should pass the translation up to the parent node so that the SBUS level ranges get applied. Based upon a bug report from Robert Reif. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/of_device.c')
-rw-r--r--arch/sparc/kernel/of_device.c26
1 files changed, 22 insertions, 4 deletions
diff --git a/arch/sparc/kernel/of_device.c b/arch/sparc/kernel/of_device.c
index c59014886af..4ef16075588 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;
}