The Xilinx PCS/PMA PHY requires that BMCR_ISOLATE be disabled for proper
operation in 1000BaseX mode. It should be safe to ensure this bit is
disabled in phylink_mii_c22_pcs_config in all cases.
Signed-off-by: Robert Hancock <robert.hancock@calian.com>
Reviewed-by: Russell King <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20201026175802.1332477-1-robert.hancock@calian.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
changed = ret > 0;
+ /* Ensure ISOLATE bit is disabled */
bmcr = mode == MLO_AN_INBAND ? BMCR_ANENABLE : 0;
ret = mdiobus_modify(pcs->bus, pcs->addr, MII_BMCR,
- BMCR_ANENABLE, bmcr);
+ BMCR_ANENABLE | BMCR_ISOLATE, bmcr);
if (ret < 0)
return ret;