[POWERPC] bootwrapper: Add find_node_by_alias and dt_fixup_mac_address_by_alias

Add the ability to set the mac address given the alias for the device.
Removes the need for having a linux,network-index property.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

2 files changed, 28 insertions, 0 deletions

diff --git a/arch/powerpc/boot/devtree.c b/arch/powerpc/boot/devtree.c
index e5dfe4497313..60f561e307a9 100644
--- a/arch/powerpc/boot/devtree.c
+++ b/arch/powerpc/boot/devtree.c
@@ -88,6 +88,20 @@ void dt_fixup_clock(const char *path, u32 freq)
         }
 }
 
+void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr)
+{
+        void *devp = find_node_by_alias(alias);
+
+        if (devp) {
+                printf("%s: local-mac-address <-"
+                       " %02x:%02x:%02x:%02x:%02x:%02x\n\r", alias,
+                       addr[0], addr[1], addr[2],
+                       addr[3], addr[4], addr[5]);
+
+                setprop(devp, "local-mac-address", addr, 6);
+        }
+}
+
 void dt_fixup_mac_address(u32 index, const u8 *addr)
 {
         void *devp = find_node_by_prop_value(NULL, "linux,network-index",
diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h
index 6036a98e646a..5872ef1779ae 100644
--- a/arch/powerpc/boot/ops.h
+++ b/arch/powerpc/boot/ops.h
@@ -159,9 +159,23 @@ static inline void *find_node_by_devtype(const void *prev,
         return find_node_by_prop_value_str(prev, "device_type", type);
 }
 
+static inline void *find_node_by_alias(const char *alias)
+{
+        void *devp = finddevice("/aliases");
+
+        if (devp) {
+                char path[MAX_PATH_LEN];
+                if (getprop(devp, alias, path, MAX_PATH_LEN) > 0)
+                        return finddevice(path);
+        }
+
+        return NULL;
+}
+
 void dt_fixup_memory(u64 start, u64 size);
 void dt_fixup_cpu_clocks(u32 cpufreq, u32 tbfreq, u32 busfreq);
 void dt_fixup_clock(const char *path, u32 freq);
+void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr);
 void dt_fixup_mac_address(u32 index, const u8 *addr);
 void __dt_fixup_mac_addresses(u32 startindex, ...);
 #define dt_fixup_mac_addresses(...) \