iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: amd-xgbe: Fix network fluctuations when using 1G BELFUSE SFP

Browse Source 
[ Upstream commit 9eab3fdb419916f66a72d1572f68d82cd9b3f963 ]

Frequent link up/down events can happen when a Bel Fuse SFP part is
connected to the amd-xgbe device. Try to avoid the frequent link
issues by resetting the PHY as documented in Bel Fuse SFP datasheets.

Fixes: e722ec82374b ("amd-xgbe: Update the BelFuse quirk to support SGMII")
Co-developed-by: Sudheesh Mavila <sudheesh.mavila@amd.com>
Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Shyam Sundar S K 2021-02-17 00:37:10 +05:30 committed by Greg Kroah-Hartman
parent 46121a6f3b
commit 825c82d551
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
View File

@ -921,6 +921,9 @@ static bool xgbe_phy_belfuse_phy_quirks(struct xgbe_prv_data *pdata)
if ((phy_id & 0xfffffff0) != 0x03625d10)
return false;
/* Reset PHY - wait for self-clearing reset bit to clear */
genphy_soft_reset(phy_data->phydev);
/* Disable RGMII mode */
phy_write(phy_data->phydev, 0x18, 0x7007);
reg = phy_read(phy_data->phydev, 0x18);