From a6c8d4f9c2db6254681d78ec93f5bd944a0cf89d Mon Sep 17 00:00:00 2001
From: Stefano Radaelli <stefano.r@variscite.com>
Date: Mon, 6 Jul 2026 11:34:34 +0200
Subject: [PATCH] arm64: dts: freescale: imx8mn-var-som: Update FEC support
 with MaxLinear PHY

Update the FEC Ethernet controller on the i.MX8MN VAR-SOM to match the
latest SOM hardware revision using the integrated MaxLinear MXL86110 PHY.

Add the PHY VDDIO supply regulator and adjust reset timings.

The PHY LED signals originate on the SOM, but the actual LEDs are part
of the carrier implementation (RJ45 connector). Move the LED
configuration to the Symphony carrier device tree, matching the
evaluation board LED wiring.

Wake-on-LAN via magic packet is not supported at the VAR-SOM level and
is therefore not enabled in the SOM device tree nor in the official
evaluation carrier board configuration (symphony).
Designs requiring WoL support may enable it in their own carrier-specific
device trees if properly integrated at the hardware level.

Signed-off-by: Stefano Radaelli <stefano.r@variscite.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 .../dts/freescale/imx8mn-var-som-symphony.dts | 20 ++++++++++++++++++-
 .../boot/dts/freescale/imx8mn-var-som.dtsi    | 20 ++++++++++---------
 2 files changed, 30 insertions(+), 10 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts b/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts
index 7308613a48b2..520aff23e587 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts
@@ -8,6 +8,7 @@
 
 /dts-v1/;
 
+#include <dt-bindings/leds/common.h>
 #include <dt-bindings/usb/pd.h>
 #include "imx8mn-var-som.dtsi"
 
@@ -74,7 +75,24 @@
 };
 
 &ethphy {
-	reset-gpios = <&pca9534 5 GPIO_ACTIVE_HIGH>;
+	leds {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		led@0 {
+			reg = <0>;
+			color = <LED_COLOR_ID_YELLOW>;
+			function = LED_FUNCTION_LAN;
+			linux,default-trigger = "netdev";
+		};
+
+		led@1 {
+			reg = <1>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_LAN;
+			linux,default-trigger = "netdev";
+		};
+	};
 };
 
 &i2c2 {
diff --git a/arch/arm64/boot/dts/freescale/imx8mn-var-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-var-som.dtsi
index 71a2f0866822..09146ab76385 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-var-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-var-som.dtsi
@@ -35,6 +35,13 @@
 		regulator-max-microvolt = <3300000>;
 		regulator-always-on;
 	};
+
+	reg_phy_vddio: regulator-phy-vddio {
+		compatible = "regulator-fixed";
+		regulator-name = "vddio-1v8";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+	};
 };
 
 &A53_0 {
@@ -96,24 +103,19 @@
 	phy-mode = "rgmii";
 	phy-handle = <&ethphy>;
 	phy-supply = <&reg_eth_phy>;
-	fsl,magic-packet;
 	status = "okay";
 
 	mdio {
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		ethphy: ethernet-phy@4 { /* AR8033 or ADIN1300 */
+		ethphy: ethernet-phy@4 {
 			compatible = "ethernet-phy-ieee802.3-c22";
 			reg = <4>;
 			reset-gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
 			reset-assert-us = <10000>;
-			/*
-			 * Deassert delay:
-			 * ADIN1300 requires 5ms.
-			 * AR8033   requires 1ms.
-			 */
-			reset-deassert-us = <20000>;
+			reset-deassert-us = <100000>;
+			vddio-supply = <&reg_phy_vddio>;
 		};
 	};
 };
@@ -342,7 +344,7 @@
 			MX8MN_IOMUXC_ENET_RXC_ENET1_RGMII_RXC		0x91
 			MX8MN_IOMUXC_ENET_RX_CTL_ENET1_RGMII_RX_CTL	0x91
 			MX8MN_IOMUXC_ENET_TX_CTL_ENET1_RGMII_TX_CTL	0x1f
-			MX8MN_IOMUXC_GPIO1_IO09_GPIO1_IO9		0x159
+			MX8MN_IOMUXC_GPIO1_IO09_GPIO1_IO9		0x19
 		>;
 	};