linux-kernel - [PATCH 1/2] arm64: dts: ti: k3-am62-wakeup: Enable cpsw_mac

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Message-ID: <20250923130901.4110013-1-d.schultz@phytec.de>
Date: Tue, 23 Sep 2025 06:09:00 -0700
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 1/2] arm64: dts: ti: k3-am62-wakeup: 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 AM62x 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>
---
 arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi
index 6549b7efa656..41ac17e809be 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi
@@ -30,6 +30,7 @@ opp_efuse_table: syscon@18 {
 		cpsw_mac_syscon: ethernet-mac-syscon@200 {
 			compatible = "ti,am62p-cpsw-mac-efuse", "syscon";
 			reg = <0x200 0x8>;
+			bootph-all;
 		};
 
 		usb0_phy_ctrl: syscon@...8 {
-- 
2.25.1