linux-kernel - Re: [Upstream] [PATCH v2 2/2] arm64: dts: ti: k3-am62a-phycore-som: Enable cpsw_mac

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Message-ID: <1af82669-380f-4e7f-b3db-f440bdd5309e@phytec.de>
Date: Thu, 27 Nov 2025 15:29:11 +0200
From: Wadim Egorov <w.egorov@...tec.de>
To: Daniel Schultz <d.schultz@...tec.de>, nm@...com, vigneshr@...com,
 kristo@...nel.org, robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
 linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Cc: upstream@...ts.phytec.de
Subject: Re: [Upstream] [PATCH v2 2/2] arm64: dts: ti: k3-am62a-phycore-som:
 Enable cpsw_mac_syscon in U-Boot



On 11/24/25 11:08 AM, Daniel Schultz wrote:
> Add the "bootph-all" property to cpsw_mac_syscon.
> 
> This fuse region contains the internal MAC address. Without this
> syscon node enabled, this interface will get a random MAC during
> network boot. This is problematic because the AM62Ax network
> boot is using BOOTP protocol for some binaries and this protocol
> does not support dynamic lease expiration. Therefore, the DHCP
> server can run out of free IP addresses.
> 
> Signed-off-by: Daniel Schultz <d.schultz@...tec.de>

Reviewed-by: Wadim Egorov <w.egorov@...tec.de>

> ---
> Changes in v2:
>    Moved changes from k2-am62a-main.dsti to k3-am62a-phycore-som.dtsi
> 
>   arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi
> index b3d012a5a26a..7f00576a4bd2 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi
> @@ -197,6 +197,11 @@ &cpsw_port1 {
>   	bootph-all;
>   };
>   
> +
> +&cpsw_mac_syscon {
> +	bootph-all;
> +};
> +
>   &cpsw3g_mdio {
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&main_mdio1_pins_default>;