arm64: dts: ti: k3-am642-main: fix ports mac properties

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

diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
index effb9d2e3c25c62627a2abe162fde172495d1a39..7f7178a7a0558cbd66b95fcdd83f28cc9a1fc5f7 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
@@ -514,7 +514,8 @@
                                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 {
@@ -522,7 +523,7 @@
                                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];
                        };
                };