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| author | Shyam Sundar S K <Shyam-sundar.S-k@amd.com> | 2021-02-16 22:07:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-04 13:37:35 +0300 |
| commit | 8845446496a72f5f435557f0e6d9a0cb1f976db8 (patch) | |
| tree | 6c7fd4bba187ab7c1fe72018125350eb386cca89 /drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c | |
| parent | 286fca3f30b94e359401c43a1ba13495cbcc6e24 (diff) | |
| download | linux-8845446496a72f5f435557f0e6d9a0cb1f976db8.tar.xz | |
net: amd-xgbe: Fix network fluctuations when using 1G BELFUSE SFP
[ 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>
Diffstat (limited to 'drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c')
| -rw-r--r-- | drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c index d3f72faecd1d..18e48b3bc402 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c @@ -922,6 +922,9 @@ 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); |