[POWERPC] bootwrapper: Factor out dt_set_mac_address()

This allows callers to set addresses one at a time when that would be more
convenient.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/boot/devtree.c

@@ -88,16 +88,9 @@ void dt_fixup_clock(const char *path, u32 freq)
 	}
 }
 
-void __dt_fixup_mac_addresses(u32 startindex, ...)
+void dt_fixup_mac_address(u32 index, const u8 *addr)
 {
-	va_list ap;
-	u32 index = startindex;
-	void *devp;
-	const u8 *addr;
-
-	va_start(ap, startindex);
-	while ((addr = va_arg(ap, const u8 *))) {
-		devp = find_node_by_prop_value(NULL, "linux,network-index",
+	void *devp = find_node_by_prop_value(NULL, "linux,network-index",
 	                                     (void*)&index, sizeof(index));
 
 	if (devp) {
@@ -108,9 +101,19 @@ void __dt_fixup_mac_addresses(u32 startindex, ...)
 
 		setprop(devp, "local-mac-address", addr, 6);
 	}
+}
+
+void __dt_fixup_mac_addresses(u32 startindex, ...)
+{
+	va_list ap;
+	u32 index = startindex;
+	const u8 *addr;
+
+	va_start(ap, startindex);
+
+	while ((addr = va_arg(ap, const u8 *)))
+		dt_fixup_mac_address(index++, addr);
 
-		index++;
-	}
 	va_end(ap);
 }
 

arch/powerpc/boot/ops.h

@@ -161,6 +161,7 @@ static inline void *find_node_by_devtype(const void *prev,
 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(u32 index, const u8 *addr);
 void __dt_fixup_mac_addresses(u32 startindex, ...);
 #define dt_fixup_mac_addresses(...) \
 	__dt_fixup_mac_addresses(0, __VA_ARGS__, NULL)