Re: [PATCH] arm64: dts: ti: k3-am642-main: fix ports mac properties

[Vignesh Raghavendra]

On 6/9/21 12:19 AM, Grygorii Strashko wrote:
> 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@xxxxxx>
> ---

Reviewed-by: Vignesh Raghavendra <vigneshr@xxxxxx>

>  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 effb9d2e3c25..7f7178a7a055 100644
> --- 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];
>  			};
>  		};
>  
>