[U-Boot] [PATCH] net/designware: revert MAC-address setup on init

[Alexey Brodkin]

http://git.denx.de/?p=u-boot.git;a=patch;h=f566c9949fbdce2e09a900c5343ca9986e5ba360
broke DW GMAC operation if !DM_ETH because eth_write_hwaddr() doesn't
exist if !DM_NET.

As for DM_ETH case I'm still not sure if existing implementation will
fly.

The point is as it is said in the comment on "soft reset" that is
triggered with setting DMAMAC_SRST in "busmode" register HW address gets
reset as well. And we inevitably need to set HW address again.

So probably better solution is to move mentioned "soft-reset" from
"init" (that is used on start of any network activity) to "initialize"
(which is only executed once in "board_r" sequence). But that's a bit of
a different story and for now let's just get DW GMAC functional again.

Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
Cc: Joe Hershberger <joe.hershberger at ni.com>
Cc: Michal Simek <michal.simek at xilinx.com>
Cc: Tom Rini <trini at konsulko.com>
---
 drivers/net/designware.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index ae51cf3..07281a6 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -243,6 +243,10 @@ static int _dw_eth_init(struct dw_eth_dev *priv, u8 *enetaddr)
 		mdelay(100);
 	};
 
+	/* Soft reset above clears HW address registers.
+	 * So we have to set it here once again */
+	_dw_write_hwaddr(priv, enetaddr);
+
 	rx_descs_init(priv);
 	tx_descs_init(priv);
 
-- 
2.4.3