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As established in the previous commit, using SPEED_1000 and SPEED_2500 does not make sense for a SerDes due to the PCS encoding that is used over the SerDes link, which inflates the data rate at the SerDes. Thus, the use of these constants in a SerDes driver is incorrect. Since qcom-sgmii-eth no longer implements phy_set_speed(), but instead uses the PHY interface mode passed via the .set_mode() method, convert the driver to use the PHY interface mode internally to decide whether to configure the SerDes for 1.25Gbps or 3.125Gbps mode. Tested-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com> Acked-by: Vinod Koul <vkoul@kernel.org> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Link: https://patch.msgid.link/E1vxS4E-0000000BQXg-46dJ@rmk-PC.armlinux.org.uk Signed-off-by: Jakub Kicinski <kuba@kernel.org>