of/flattree: Make the kernel accept ePAPR style phandle information
Currently when processing flattened device trees, the kernel expects
the phandle in a property called "linux,phandle". The ePAPR spec -
not being Linux specific - instead requires phandles to be encoded in
a property named simply "phandle". This patch makes the kernel accept
either form when unflattening the device tree.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 18d282f..b51f797 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -310,10 +310,19 @@
pp = unflatten_dt_alloc(&mem, sizeof(struct property),
__alignof__(struct property));
if (allnextpp) {
- if (strcmp(pname, "linux,phandle") == 0) {
+ /* We accept flattened tree phandles either in
+ * ePAPR-style "phandle" properties, or the
+ * legacy "linux,phandle" properties. If both
+ * appear and have different values, things
+ * will get weird. Don't do that. */
+ if ((strcmp(pname, "phandle") == 0) ||
+ (strcmp(pname, "linux,phandle") == 0)) {
if (np->phandle == 0)
np->phandle = *((u32 *)*p);
}
+ /* And we process the "ibm,phandle" property
+ * used in pSeries dynamic device tree
+ * stuff */
if (strcmp(pname, "ibm,phandle") == 0)
np->phandle = *((u32 *)*p);
pp->name = pname;