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authorDavid Thomson <david.thomson@alliedtelesis.co.nz>2015-07-10 16:28:25 +1200
committerDavid S. Miller <davem@davemloft.net>2015-07-10 23:17:32 -0700
commit239aa55b9496144f89670b545b5698e6c989f710 (patch)
treebe0bbed05631a3bc8ae273d64319dad5b01ebb0a /drivers/net/phy/marvell.c
parent634ec36cc0ab9d8dda0f2c101fa28d2e2a61b9eb (diff)
net: phy: Support setting polarity in marvell phy driver
Support manually setting the polarity to mdi or mdix Signed-off-by: David Thomson <david.thomson@alliedtelesis.co.nz> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/marvell.c')
-rw-r--r--drivers/net/phy/marvell.c42
1 files changed, 40 insertions, 2 deletions
diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index f721444c2b0a..3320a179ee36 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -48,6 +48,8 @@
#define MII_M1011_IMASK_CLEAR 0x0000
#define MII_M1011_PHY_SCR 0x10
+#define MII_M1011_PHY_SCR_MDI 0x0000
+#define MII_M1011_PHY_SCR_MDI_X 0x0020
#define MII_M1011_PHY_SCR_AUTO_CROSS 0x0060
#define MII_M1145_PHY_EXT_SR 0x1b
@@ -159,6 +161,43 @@ static int marvell_config_intr(struct phy_device *phydev)
return err;
}
+static int marvell_set_polarity(struct phy_device *phydev, int polarity)
+{
+ int reg;
+ int err;
+ int val;
+
+ /* get the current settings */
+ reg = phy_read(phydev, MII_M1011_PHY_SCR);
+ if (reg < 0)
+ return reg;
+
+ val = reg;
+ val &= ~MII_M1011_PHY_SCR_AUTO_CROSS;
+ switch (polarity) {
+ case ETH_TP_MDI:
+ val |= MII_M1011_PHY_SCR_MDI;
+ break;
+ case ETH_TP_MDI_X:
+ val |= MII_M1011_PHY_SCR_MDI_X;
+ break;
+ case ETH_TP_MDI_AUTO:
+ case ETH_TP_MDI_INVALID:
+ default:
+ val |= MII_M1011_PHY_SCR_AUTO_CROSS;
+ break;
+ }
+
+ if (val != reg) {
+ /* Set the new polarity value in the register */
+ err = phy_write(phydev, MII_M1011_PHY_SCR, val);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
static int marvell_config_aneg(struct phy_device *phydev)
{
int err;
@@ -191,8 +230,7 @@ static int marvell_config_aneg(struct phy_device *phydev)
if (err < 0)
return err;
- err = phy_write(phydev, MII_M1011_PHY_SCR,
- MII_M1011_PHY_SCR_AUTO_CROSS);
+ err = marvell_set_polarity(phydev, phydev->mdix);
if (err < 0)
return err;