Re: [RFT] sky2: yukon-ec-u phy power problems
From: Kevin E <hidden>
Date: 2007-08-22 22:37:29
Also in:
lkml
--- Stephen Hemminger[off-list ref] wrote:
quoted hunk ↗ jump to hunk
The sky2 driver clears some bits in the PHY control register, that cause the PHY interface to get changed. Some of these deal with voltage and power savings as well. This may explain some of the failures on Gigabyte DS-3 motherboard. The clue to possible problem was looking at why loading/unloading sky2 would break vendor sk98lin driver (ie what registers changed).--- a/drivers/net/sky2.c 2007-08-2109:53:41.000000000 -0700+++ b/drivers/net/sky2.c 2007-08-2109:53:43.000000000 -0700@@ -696,8 +696,8 @@ static void sky2_mac_init(structsky2_hw int i; const u8 *addr = hw->dev[port]->dev_addr; - sky2_write32(hw, SK_REG(port, GPHY_CTRL), GPC_RST_SET); - sky2_write32(hw, SK_REG(port, GPHY_CTRL), GPC_RST_CLR); + sky2_write8(hw, SK_REG(port, GPHY_CTRL), GPC_RST_SET); + sky2_write8(hw, SK_REG(port, GPHY_CTRL), GPC_RST_CLR); sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_RST_CLR);
This appears to have fixed the problem! I made the
change to the kernel on the broken MB and the link
stayed up. So I went ahead and made the change to the
kernel on the working one too. Right now I'm using
netcat to saturate the link and make sure it stays up.
So far it's looking good, if I have any problems I'll
let you know.
Thanks,
Kevin
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