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

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Message-ID: <20251124090842.3377294-2-d.schultz@phytec.de>
Date: Mon, 24 Nov 2025 01:08:42 -0800
From: Daniel Schultz <d.schultz@...tec.de>
To: <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>, Daniel Schultz <d.schultz@...tec.de>
Subject: [PATCH v2 2/2] arm64: dts: ti: k3-am62a-phycore-som: Enable cpsw_mac_syscon in U-Boot

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>
---
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>;
-- 
2.25.1