net: phy: dp83867: fix speed 10 in sgmii mode
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>
diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c
index fd35131..1091a62 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);