From 322bb2056ba90d55603f081ae57a652a06357bac Mon Sep 17 00:00:00 2001
From: Holger Brunck <holger.brunck@keymile.com>
Date: Mon, 21 Jan 2013 03:55:17 +0000
Subject: km/common/ivm: rework piggy mac adress offset generation

For the the kmvect1 board we will also need a functionality to add an
offset to the IVMs MAC address, because these board will have two valid
ethernet ports for debugging purpose. So move the code to an own
function.

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>

diff --git a/board/keymile/common/ivm.c b/board/keymile/common/ivm.c
index 607daa6..d568fd9 100644
--- a/board/keymile/common/ivm.c
+++ b/board/keymile/common/ivm.c
@@ -201,6 +201,22 @@ static int ivm_check_crc(unsigned char *buf, int block)
 	return 0;
 }
 
+static int calculate_mac_offset(unsigned char *valbuf, unsigned char *buf,
+				int offset)
+{
+	unsigned long val = (buf[4] << 16) + (buf[5] << 8) + buf[6];
+
+	if (offset == 0)
+		return 0;
+
+	val += offset;
+	buf[4] = (val >> 16) & 0xff;
+	buf[5] = (val >> 8) & 0xff;
+	buf[6] = val & 0xff;
+	sprintf((char *)valbuf, "%pM", buf + 1);
+	return 0;
+}
+
 static int ivm_analyze_block2(unsigned char *buf, int len)
 {
 	unsigned char	valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
@@ -210,17 +226,7 @@ static int ivm_analyze_block2(unsigned char *buf, int len)
 	sprintf((char *)valbuf, "%pM", buf + 1);
 	ivm_set_value("IVM_MacAddress", (char *)valbuf);
 	/* if an offset is defined, add it */
-#if defined(CONFIG_PIGGY_MAC_ADRESS_OFFSET)
-	if (CONFIG_PIGGY_MAC_ADRESS_OFFSET > 0) {
-		unsigned long val = (buf[4] << 16) + (buf[5] << 8) + buf[6];
-
-		val += CONFIG_PIGGY_MAC_ADRESS_OFFSET;
-		buf[4] = (val >> 16) & 0xff;
-		buf[5] = (val >> 8) & 0xff;
-		buf[6] = val & 0xff;
-		sprintf((char *)valbuf, "%pM", buf + 1);
-	}
-#endif
+	calculate_mac_offset(buf, valbuf, CONFIG_PIGGY_MAC_ADRESS_OFFSET);
 #ifdef MACH_TYPE_KM_KIRKWOOD
 	setenv((char *)"ethaddr", (char *)valbuf);
 #else
-- 
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