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| author | Max Uvarov <muvarov@gmail.com> | 2019-05-28 13:00:50 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-05-29 14:28:48 -0700 |
| commit | 1a97a477e666cbdededab93bd3754e508f0c09d7 (patch) | |
| tree | 1b866e6ee119f1d2703e493a89e0334bce3dc469 /drivers/net/phy | |
| parent | 333061b924539c0de081339643f45514f5f1c1e6 (diff) | |
| download | linux-1a97a477e666cbdededab93bd3754e508f0c09d7.tar.gz | |
net: phy: dp83867: increase SGMII autoneg timer duration
After reset SGMII Autoneg timer is set to 2us (bits 6 and 5 are 01). That is not enough to finalize autonegatiation on some devices. Increase this timer duration to maximum supported 16ms. Signed-off-by: Max Uvarov <muvarov@gmail.com> Cc: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy')
| -rw-r--r-- | drivers/net/phy/dp83867.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c index 1091a625bf4c..14e9e8a94639 100644 --- a/drivers/net/phy/dp83867.c +++ b/drivers/net/phy/dp83867.c @@ -26,6 +26,12 @@ /* Extended Registers */ #define DP83867_CFG4 0x0031 +#define DP83867_CFG4_SGMII_ANEG_MASK (BIT(5) | BIT(6)) +#define DP83867_CFG4_SGMII_ANEG_TIMER_11MS (3 << 5) +#define DP83867_CFG4_SGMII_ANEG_TIMER_800US (2 << 5) +#define DP83867_CFG4_SGMII_ANEG_TIMER_2US (1 << 5) +#define DP83867_CFG4_SGMII_ANEG_TIMER_16MS (0 << 5) + #define DP83867_RGMIICTL 0x0032 #define DP83867_STRAP_STS1 0x006E #define DP83867_RGMIIDCTL 0x0086 @@ -292,6 +298,18 @@ static int dp83867_config_init(struct phy_device *phydev) 0); if (ret) return ret; + + /* After reset SGMII Autoneg timer is set to 2us (bits 6 and 5 + * are 01). That is not enough to finalize autoneg on some + * devices. Increase this timer duration to maximum 16ms. + */ + ret = phy_modify_mmd(phydev, DP83867_DEVADDR, + DP83867_CFG4, + DP83867_CFG4_SGMII_ANEG_MASK, + DP83867_CFG4_SGMII_ANEG_TIMER_16MS); + + if (ret) + return ret; } /* Enable Interrupt output INT_OE in CFG3 register */ |