This is a note to let you know that I've just added the patch titled net: ethernet: ti: am65-cpsw: fix rmii 100Mbit link mode to the 5.8-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-ethernet-ti-am65-cpsw-fix-rmii-100mbit-link-mode.patch and it can be found in the queue-5.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 2e72e775ee23776e9e3b7f6fbcbb6a1ed8700b69 Author: Grygorii Strashko <grygorii.strashko@xxxxxx> Date: Sun Aug 30 20:34:32 2020 +0300 net: ethernet: ti: am65-cpsw: fix rmii 100Mbit link mode [ Upstream commit c2f89219f559502c9292d79f695bab9dcec532d1 ] In RMII link mode it's required to set bit 15 IFCTL_A in MAC_SL MAC_CONTROL register to enable support for 100Mbit link speed. Fixes: 93a76530316a ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver") Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c index 88832277edd5a..c7c9980e02604 100644 --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c @@ -172,6 +172,8 @@ void am65_cpsw_nuss_adjust_link(struct net_device *ndev) if (phy->speed == 10 && phy_interface_is_rgmii(phy)) /* Can be used with in band mode only */ mac_control |= CPSW_SL_CTL_EXT_EN; + if (phy->speed == 100 && phy->interface == PHY_INTERFACE_MODE_RMII) + mac_control |= CPSW_SL_CTL_IFCTL_A; if (phy->duplex) mac_control |= CPSW_SL_CTL_FULLDUPLEX;