[U-Boot] net, fec_mxc: init mac address before using network commands

[Heiko Schocher <hs@denx.de>]

initialize mac address with the value from "ethaddr", before
doing some network commands. This is not in line with u-boot
design principle "not to initalize not used devices", and
maybe should go away, if there is a solution for passing
the mac address to arm linux kernels.

Tested on the magnesium board.

Signed-off-by: Heiko Schocher <hs@denx.de>
---
posting this patch as a result of this discussion:

http://lists.denx.de/pipermail/u-boot/2010-March/069025.html

 drivers/net/fec_mxc.c |   15 +++++++++++----
 1 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index 5af9cdb..9029490 100644
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -749,11 +749,18 @@ static int fec_probe(bd_t *bd)

 	eth_register(edev);

-	if (fec_get_hwaddr(edev, ethaddr) == 0) {
-		printf("got MAC address from EEPROM: %pM\n", ethaddr);
-		memcpy(edev->enetaddr, ethaddr, 6);
-		fec_set_hwaddr(edev);
+	if (!eth_getenv_enetaddr("ethaddr", ethaddr)) {	
+		/* "ethaddr" is not set in the environment */
+		if (fec_get_hwaddr(edev, ethaddr) == 0) {
+			printf("got MAC address from EEPROM: %pM\n", ethaddr);
+			eth_setenv_enetaddr("ethaddr", ethaddr);
+		} else {
+			printf ("no MAC found\n");
+			return -1;
+		}
 	}
+	memcpy(edev->enetaddr, ethaddr, 6);
+	fec_set_hwaddr(edev);

 	return 0;
 }
-- 
1.6.2.5

-- 
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