Re: [PATCH 2/4] arm64: dts: ti: k3-j7200-common-proc-board: Add ethernet alias

[Francesco Dolcini <francesco@dolcini.it>]

On Sun, Sep 06, 2026 at 11:13:27AM +0530, Kumar, Udit wrote:
> 
> 
> On 8/11/2026 11:43 AM, Siddharth Vadapalli wrote:
> > Add the 'ethernet0' alias for the Ethernet interface corresponding to the
> > MCU CPSW2G instance of the CPSW Ethernet Switch on the J7200 Common
> > Processor Board.
> > 
> > Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
> > ---
> >  arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> > index 54dea36b153b..ac1c1ffe40b7 100644
> > --- a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> > +++ b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
> > @@ -24,6 +24,7 @@ aliases {
> >  		serial5 = &main_uart3;
> >  		mmc0 = &main_sdhci0;
> >  		mmc1 = &main_sdhci1;
> > +		ethernet0 = &cpsw_port1;
> 
> Hello Siddharth,
> As default only 1 cpsw port is enabled for all boards in this series.
> So ethernet0 will be cpsw_port1 always, In case you want to enable more
> port in default config then having aliasing will help.

I do not know for this specific board, but in general having the alias
when only one ethernet interface is present in the DT can still be
useful.

We might want it to ensure that the interface name is stable (`end0`
with systemd), or maybe you can have additional interfaces that are on
some discoverable bus (PCIe ?) or you need it for the bootloader to set
correctly the MAC address or ...

Francesco