From: Max Uvarov muvarov@gmail.com
[ Upstream commit 333061b924539c0de081339643f45514f5f1c1e6 ]
For supporting 10Mps speed in SGMII mode DP83867_10M_SGMII_RATE_ADAPT bit of DP83867_10M_SGMII_CFG register has to be cleared by software. That does not affect speeds 100 and 1000 so can be done on init.
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/phy/dp83867.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c index 8448d01819ef..29cae4de9a4f 100644 --- a/drivers/net/phy/dp83867.c +++ b/drivers/net/phy/dp83867.c @@ -30,6 +30,8 @@ #define DP83867_STRAP_STS1 0x006E #define DP83867_RGMIIDCTL 0x0086 #define DP83867_IO_MUX_CFG 0x0170 +#define DP83867_10M_SGMII_CFG 0x016F +#define DP83867_10M_SGMII_RATE_ADAPT_MASK BIT(7)
#define DP83867_SW_RESET BIT(15) #define DP83867_SW_RESTART BIT(14) @@ -277,6 +279,21 @@ static int dp83867_config_init(struct phy_device *phydev) DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL); }
+ if (phydev->interface == PHY_INTERFACE_MODE_SGMII) { + /* For support SPEED_10 in SGMII mode + * DP83867_10M_SGMII_RATE_ADAPT bit + * has to be cleared by software. That + * does not affect SPEED_100 and + * SPEED_1000. + */ + ret = phy_modify_mmd(phydev, DP83867_DEVADDR, + DP83867_10M_SGMII_CFG, + DP83867_10M_SGMII_RATE_ADAPT_MASK, + 0); + if (ret) + return ret; + } + /* Enable Interrupt output INT_OE in CFG3 register */ if (phy_interrupt_is_valid(phydev)) { val = phy_read(phydev, DP83867_CFG3);