Like [1], reset the FLP burst timing for the KSZ9031 to the 16ms specified by the IEEE802.3 standard from the chip's default of 8ms.
For more details, see the "Auto-Negotiation Timing" section of the KSZ9031RNX datasheet.
[1] https://patchwork.kernel.org/patch/6558371/
Signed-off-by: Ash Charles ash.charles@savoirfairelinux.com --- drivers/net/phy/micrel.c | 23 +++++++++++++++++++++++ include/micrel.h | 3 +++ 2 files changed, 26 insertions(+)
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c index 6b313a9..28a1401 100644 --- a/drivers/net/phy/micrel.c +++ b/drivers/net/phy/micrel.c @@ -415,11 +415,31 @@ static int ksz9031_of_config(struct phy_device *phydev)
return 0; } + +static int ksz9031_center_flp_timing(struct phy_device *phydev) +{ + struct phy_driver *drv = phydev->drv; + int ret = 0; + + if (!drv || !drv->writeext) + return -EOPNOTSUPP; + + ret = drv->writeext(phydev, 0, 0, MII_KSZ9031_FLP_BURST_TX_LO, 0x1A80); + if (ret) + return ret; + + ret = drv->writeext(phydev, 0, 0, MII_KSZ9031_FLP_BURST_TX_HI, 0x6); + return ret; +} #else static int ksz9031_of_config(struct phy_device *phydev) { return 0; } +static int ksz9031_center_flp_timing(struct phy_device *phydev) +{ + return 0; +} #endif
/* Accessors to extended registers*/ @@ -472,6 +492,9 @@ static int ksz9031_config(struct phy_device *phydev) ret = ksz9031_of_config(phydev); if (ret) return ret; + ret = ksz9031_center_flp_timing(phydev); + if (ret) + return ret; return genphy_config(phydev); }
diff --git a/include/micrel.h b/include/micrel.h index e6d145d..3e6b531 100644 --- a/include/micrel.h +++ b/include/micrel.h @@ -20,6 +20,9 @@ #define MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW 0x6 #define MII_KSZ9031_EXT_RGMII_CLOCK_SKEW 0x8
+#define MII_KSZ9031_FLP_BURST_TX_LO 0x3 +#define MII_KSZ9031_FLP_BURST_TX_HI 0x4 + /* Registers */ #define MMD_ACCESS_CONTROL 0xd #define MMD_ACCESS_REG_DATA 0xe