The environment variable "disable_giga" can now be used to disable
1000baseTx on the Micrel's KSZ9031.
Signed-off-by: Sebastien Bourdelin <sebastien.bourde...@savoirfairelinux.com>
---
drivers/net/phy/micrel.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 0e4a4ebcc6..eeeba3c232 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -491,12 +491,39 @@ static int ksz9031_phy_extwrite(struct phy_device
*phydev, int addr,
static int ksz9031_config(struct phy_device *phydev)
{
int ret;
+ unsigned features;
+ unsigned bmcr = 0;
+
ret = ksz9031_of_config(phydev);
if (ret)
return ret;
ret = ksz9031_center_flp_timing(phydev);
if (ret)
return ret;
+
+ /* add an option to disable the gigabit feature of this PHY */
+ if (getenv("disable_giga")) {
+ /* disable speed 1000 in features supported by the PHY */
+ features = phydev->drv->features;
+ features &= ~(SUPPORTED_1000baseT_Half |
+ SUPPORTED_1000baseT_Full);
+ phydev->advertising = phydev->supported = features;
+
+ /* disable speed 1000 in Basic Control Register */
+ bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+ bmcr &= ~(1 << 6);
+ phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, bmcr);
+
+ /* disable speed 1000 in 1000Base-T Control Register */
+ phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, 0);
+
+ /* start autoneg */
+ genphy_config_aneg(phydev);
+ genphy_restart_aneg(phydev);
+
+ return 0;
+ }
+
return genphy_config(phydev);
}
--
2.13.3
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
