ksz8021_config_init() unconditionally sets the KSZPHY_OMSO_RMII_OVERRIDE
bit. This is since the initial micrel phy commit, so it's not
reproducible where this comes from and why this is done. Neither U-Boot
nor the kernel ever touch this bit and so should we. Also, instead
of doing a write only operation, read/modify/write the bit we actually
want to change.
This fixes operation on a KSZ8081MLX which is a MII only phy.
KSZPHY_OMSO_RMII_OVERRIDE is reserved here and must be written to 0.
KSZPHY_OMSO_MII_OVERRIDE is default 1 and must be written as 1.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
drivers/net/phy/micrel.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 9a30cb7..0ca359b 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -72,8 +72,12 @@ static int kszphy_config_init(struct phy_device *phydev)
static int ksz8021_config_init(struct phy_device *phydev)
{
- const u16 val = KSZPHY_OMSO_B_CAST_OFF | KSZPHY_OMSO_RMII_OVERRIDE;
+ u16 val;
+
+ val = phy_read(phydev, MII_KSZPHY_OMSO);
+ val |= KSZPHY_OMSO_B_CAST_OFF;
phy_write(phydev, MII_KSZPHY_OMSO, val);
+
return 0;
}
--
2.10.1
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