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

[ 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>

diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
index ca59d1f711f8aee5b71e1ed7267d4f2e85563176..bcbf436a96b55d919ca1b41e8ec250503adadf38 100644 (file)
--- 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];
                        };
                };