From: Grygorii Strashko grygorii.strashko@ti.com
[ Upstream commit 50c9bfca1bfe9ffd56d8c5deecf9204d14e20bfd ]
The current device tree CPSW3g node adds non-zero "mac-address" property to the ports, which prevents random MAC address assignment to network devices if bootloader failed to update DT. This may cause more then one host to have the same MAC in the network.
mac-address = [00 00 de ad be ef]; mac-address = [00 01 de ad be ef];
In addition, there is one MAC address available in eFuse registers which can be used for default port 1.
Hence, fix ports MAC properties by: - resetting "mac-address" property to 0 - adding ti,syscon-efuse = <&main_conf 0x200> to Port 1
Fixes: 3753b12877b6 ("arm64: dts: ti: k3-am64-main: Add CPSW DT node") Signed-off-by: Grygorii Strashko grygorii.strashko@ti.com Reviewed-by: Vignesh Raghavendra vigneshr@ti.com Signed-off-by: Nishanth Menon nm@ti.com Link: https://lore.kernel.org/r/20210608184940.25934-1-grygorii.strashko@ti.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi index ca59d1f711f8..bcbf436a96b5 100644 --- a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi @@ -489,7 +489,8 @@ ti,mac-only; label = "port1"; phys = <&phy_gmii_sel 1>; - mac-address = [00 00 de ad be ef]; + mac-address = [00 00 00 00 00 00]; + ti,syscon-efuse = <&main_conf 0x200>; };
cpsw_port2: port@2 { @@ -497,7 +498,7 @@ ti,mac-only; label = "port2"; phys = <&phy_gmii_sel 2>; - mac-address = [00 01 de ad be ef]; + mac-address = [00 00 00 00 00 00]; }; };