From 48b1f8a396bfe1b29d2033f3d23861a3f470de58 Mon Sep 17 00:00:00 2001
From: Romain Gantois <romain.gantois@bootlin.com>
Date: Thu, 26 Jun 2025 18:20:25 +0200
Subject: board: ti: am33xx: Add Ethernet support for Beaglebone Green Eco

Currently, the Ethernet interface of the BBGE board isn't properly
supported.

To support this interface, describe the MAC<->PHY RGMII link and the
DP83867 PHY in the BBGE device tree. Enable the DP83867 PHY driver in
U-Boot Proper and mux the relevant RGMII lines.

Signed-off-by: Romain Gantois <romain.gantois@bootlin.com>
Tested-by: Judith Mendez <jm@ti.com>
---
 arch/arm/dts/am335x-bonegreen-eco.dts | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'arch')

diff --git a/arch/arm/dts/am335x-bonegreen-eco.dts b/arch/arm/dts/am335x-bonegreen-eco.dts
index f3363d1ebcc..1e9d7fed3fd 100644
--- a/arch/arm/dts/am335x-bonegreen-eco.dts
+++ b/arch/arm/dts/am335x-bonegreen-eco.dts
@@ -7,6 +7,7 @@
 #include "am33xx.dtsi"
 #include "am335x-bone-common.dtsi"
 #include "am335x-bonegreen-common.dtsi"
+#include <dt-bindings/net/ti-dp83867.h>
 
 / {
 	model = "TI AM335x BeagleBone Green Eco";
@@ -25,6 +26,24 @@
 	interrupt-names = "mc";
 };
 
+&cpsw_emac0 {
+	phy-mode = "rgmii-id";
+	phy-handle = <&dp83867_0>;
+};
+
+&davinci_mdio {
+	/delete-node/ ethernet-phy@0;
+
+	dp83867_0: ethernet-phy@0 {
+		reg = <0>;
+		ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_50_NS>;
+		ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_50_NS>;
+		ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_8_B_NIB>;
+		ti,min-output-impedance;
+		ti,dp83867-rxctrl-strap-quirk;
+	};
+};
+
 &baseboard_eeprom {
 	/delete-property/ vcc-supply;
 };
-- 
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