Re: [PATCH v4 2/6] arm64: dts: ti: k3-j784s4: Add alias to MCU CPSW2G

[Andrew Davis]

On 1/31/24 4:14 AM, Chintan Vankar wrote:
> Add alias for the MCU CPSW2G port to enable Linux to fetch MAC Address
> for the port directly from U-Boot.

Could you explain *how* this alias allows Linux to fetch a MAC
address from U-Boot? Sounds like we are doing something hacky here..

Why can't Linux fetch the MAC from efuses the same way U-Boot does,
what happens if I don't use U-Boot to boot?

Andrew

> ---
>   arch/arm64/boot/dts/ti/k3-j784s4-evm.dts | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> index f34b92acc56d..b74f7d3025de 100644
> --- a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> +++ b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> @@ -27,6 +27,7 @@ aliases {
>   		mmc1 = &main_sdhci1;
>   		i2c0 = &wkup_i2c0;
>   		i2c3 = &main_i2c0;
> +		ethernet0 = &mcu_cpsw_port1;
>   	};
>   
>   	memory@80000000 {