arm64: dts: ti: k3-am642-evm: Add ICSSG0 overlay for dual EMAC support

Add device tree overlay to enable ICSSG0 dual EMAC support on AM642 EVM.
This overlay enables both ICSSG0 Ethernet interfaces (port0 and port1) in
dual EMAC mode.

Users can combine this with the existing ICSSG1 overlay to enable all four
ICSSG interfaces if needed.

Signed-off-by: Meghana Malladi <m-malladi@ti.com>
Link: https://patch.msgid.link/20260323090358.632329-2-m-malladi@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

2 files changed, 172 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 94163d0e37c9..5269c9619b65 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -64,6 +64,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-hdmi-audio.dtbo
 
 # Boards with AM64x SoC
 dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-icssg0.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-icssg1-dualemac.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-icssg1-dualemac-mii.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-pcie0-ep.dtbo
@@ -216,6 +217,8 @@ k3-am62p5-sk-csi2-ov5640-dtbs := k3-am62p5-sk.dtb \
 	k3-am62x-sk-csi2-ov5640.dtbo
 k3-am62p5-sk-csi2-tevi-ov5640-dtbs := k3-am62p5-sk.dtb \
 	k3-am62x-sk-csi2-tevi-ov5640.dtbo
+k3-am642-evm-icssg0-dtbs := \
+	k3-am642-evm.dtb k3-am642-evm-icssg0.dtbo
 k3-am642-evm-icssg1-dualemac-dtbs := \
 	k3-am642-evm.dtb k3-am642-evm-icssg1-dualemac.dtbo
 k3-am642-evm-icssg1-dualemac-mii-dtbs := \
@@ -302,6 +305,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
 	k3-am62p5-sk-csi2-imx219.dtb \
 	k3-am62p5-sk-csi2-ov5640.dtb \
 	k3-am62p5-sk-csi2-tevi-ov5640.dtb \
+	k3-am642-evm-icssg0.dtb \
 	k3-am642-evm-icssg1-dualemac.dtb \
 	k3-am642-evm-icssg1-dualemac-mii.dtb \
 	k3-am642-evm-pcie0-ep.dtb \
diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm-icssg0.dtso b/arch/arm64/boot/dts/ti/k3-am642-evm-icssg0.dtso
new file mode 100644
index 000000000000..0c8e245e526c
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm-icssg0.dtso
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/**
+ * DT overlay for enabling ICSSG0 dual EMAC on AM642 EVM
+ *
+ * AM642 EVM Product link: https://www.ti.com/tool/TMDS64EVM
+ * DP83TG720 daughter card link: https://www.ti.com/tool/DP83TG720-IND-SPE-EVM
+ *
+ * Copyright (C) 2020-2026 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include "k3-pinctrl.h"
+
+&{/} {
+	icssg0_eth: icssg0-eth {
+		compatible = "ti,am642-icssg-prueth";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pru_icssg0_rgmii1_pins_default>, <&pru_icssg0_rgmii2_pins_default>;
+		sram = <&oc_sram>;
+
+		dmas = <&main_pktdma 0xc100 15>, /* egress slice 0 */
+		       <&main_pktdma 0xc101 15>, /* egress slice 0 */
+		       <&main_pktdma 0xc102 15>, /* egress slice 0 */
+		       <&main_pktdma 0xc103 15>, /* egress slice 0 */
+		       <&main_pktdma 0xc104 15>, /* egress slice 1 */
+		       <&main_pktdma 0xc105 15>, /* egress slice 1 */
+		       <&main_pktdma 0xc106 15>, /* egress slice 1 */
+		       <&main_pktdma 0xc107 15>, /* egress slice 1 */
+		       <&main_pktdma 0x4100 15>, /* ingress slice 0 */
+		       <&main_pktdma 0x4101 15>; /* ingress slice 1 */
+		dma-names = "tx0-0", "tx0-1", "tx0-2", "tx0-3",
+			    "tx1-0", "tx1-1", "tx1-2", "tx1-3",
+			    "rx0", "rx1";
+
+		interrupt-parent = <&icssg0_intc>;
+		interrupts = <24 0 2>, <25 1 3>;
+		interrupt-names = "tx_ts0", "tx_ts1";
+
+		ti,prus = <&pru0_0>, <&rtu0_0>, <&tx_pru0_0>, <&pru0_1>, <&rtu0_1>, <&tx_pru0_1>;
+		firmware-name = "ti-pruss/am64x-sr2-pru0-prueth-fw.elf",
+				"ti-pruss/am64x-sr2-rtu0-prueth-fw.elf",
+				"ti-pruss/am64x-sr2-txpru0-prueth-fw.elf",
+				"ti-pruss/am64x-sr2-pru1-prueth-fw.elf",
+				"ti-pruss/am64x-sr2-rtu1-prueth-fw.elf",
+				"ti-pruss/am64x-sr2-txpru1-prueth-fw.elf";
+
+		ti,pruss-gp-mux-sel = <2>,	/* MII mode */
+				      <2>,
+				      <2>,
+				      <2>,	/* MII mode */
+				      <2>,
+				      <2>;
+
+		ti,mii-g-rt = <&icssg0_mii_g_rt>;
+		ti,mii-rt = <&icssg0_mii_rt>;
+		ti,iep = <&icssg0_iep0>,  <&icssg0_iep1>;
+		ti,pa-stats = <&icssg0_pa_stats>;
+
+		ethernet-ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			icssg0_emac0: port@0 {
+				reg = <0>;
+				phy-handle = <&icssg0_phy00>;
+				phy-mode = "rgmii-id";
+				ti,syscon-rgmii-delay = <&main_conf 0x4100>;
+				/* Filled in by bootloader */
+				local-mac-address = [00 00 00 00 00 00];
+			};
+
+			icssg0_emac1: port@1 {
+				reg = <1>;
+				phy-handle = <&icssg0_phy01>;
+				phy-mode = "rgmii-id";
+				ti,syscon-rgmii-delay = <&main_conf 0x4104>;
+				/* Filled in by bootloader */
+				local-mac-address = [00 00 00 00 00 00];
+			};
+		};
+	};
+};
+
+&main_pmx0 {
+	pru_icssg0_mdio_pins_default: pru-icssg0-mdio-pins {
+		pinctrl-single,pins = <
+			/* (P3) PRG0_MDIO0_MDC */
+			AM64X_IOPAD(0x0204, PIN_OUTPUT, 0)
+			/* (P2) PRG0_MDIO0_MDIO */
+			AM64X_IOPAD(0x0200, PIN_INPUT, 0)
+			/* (P16) GPIO0_32 - GPMC0_ADVn_ALE - GPIO_ETH0/1_RESETn# */
+			AM64X_IOPAD(0x0084, PIN_OUTPUT, 7)
+		>;
+	};
+
+	pru_icssg0_rgmii1_pins_default: pru-icssg0-rgmii1-pins {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x0160, PIN_INPUT, 2)  /* (Y1) PRG0_PRU0_GPO0.PRG0_RGMII1_RD0 */
+			AM64X_IOPAD(0x0164, PIN_INPUT, 2)  /* (R4) PRG0_PRU0_GPO1.PRG0_RGMII1_RD1 */
+			AM64X_IOPAD(0x0168, PIN_INPUT, 2)  /* (U2) PRG0_PRU0_GPO2.PRG0_RGMII1_RD2 */
+			AM64X_IOPAD(0x016c, PIN_INPUT, 2)  /* (V2) PRG0_PRU0_GPO3.PRG0_RGMII1_RD3 */
+			AM64X_IOPAD(0x0178, PIN_INPUT, 2)  /* (T3) PRG0_PRU0_GPO6.PRG0_RGMII1_RXC */
+			AM64X_IOPAD(0x0170, PIN_INPUT, 2)  /* (AA2) PRG0_PRU0_GPO4.PRG0_RGMII1_RX_CTL */
+			AM64X_IOPAD(0x018c, PIN_OUTPUT, 2) /* (Y3) PRG0_PRU0_GPO11.PRG0_RGMII1_TD0 */
+			AM64X_IOPAD(0x0190, PIN_OUTPUT, 2) /* (AA3) PRG0_PRU0_GPO12.PRG0_RGMII1_TD1 */
+			AM64X_IOPAD(0x0194, PIN_OUTPUT, 2) /* (R6) PRG0_PRU0_GPO13.PRG0_RGMII1_TD2 */
+			AM64X_IOPAD(0x0198, PIN_OUTPUT, 2) /* (V4) PRG0_PRU0_GPO14.PRG0_RGMII1_TD3 */
+			AM64X_IOPAD(0x01a0, PIN_OUTPUT, 2) /* (U4) PRG0_PRU0_GPO16.PRG0_RGMII1_TXC */
+			AM64X_IOPAD(0x019c, PIN_OUTPUT, 2) /* (T5) PRG0_PRU0_GPO15.PRG0_RGMII1_TX_CTL */
+		>;
+	};
+
+	pru_icssg0_rgmii2_pins_default: pru-icssg0-rgmii2-pins {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x01b0, PIN_INPUT, 2)  /* (Y2) PRG0_PRU1_GPO0.PRG0_RGMII2_RD0 */
+			AM64X_IOPAD(0x01b4, PIN_INPUT, 2)  /* (W2) PRG0_PRU1_GPO1.PRG0_RGMII2_RD1 */
+			AM64X_IOPAD(0x01b8, PIN_INPUT, 2)  /* (V3) PRG0_PRU1_GPO2.PRG0_RGMII2_RD2 */
+			AM64X_IOPAD(0x01bc, PIN_INPUT, 2)  /* (T4) PRG0_PRU1_GPO3.PRG0_RGMII2_RD3 */
+			AM64X_IOPAD(0x01c8, PIN_INPUT, 2)  /* (R5) PRG0_PRU1_GPO6.PRG0_RGMII2_RXC */
+			AM64X_IOPAD(0x01c0, PIN_INPUT, 2)  /* (W3) PRG0_PRU1_GPO4.PRG0_RGMII2_RX_CTL */
+			AM64X_IOPAD(0x01dc, PIN_OUTPUT, 2) /* (W4) PRG0_PRU1_GPO11.PRG0_RGMII2_TD0 */
+			AM64X_IOPAD(0x01e0, PIN_OUTPUT, 2) /* (Y4) PRG0_PRU1_GPO12.PRG0_RGMII2_TD1 */
+			AM64X_IOPAD(0x01e4, PIN_OUTPUT, 2) /* (T6) PRG0_PRU1_GPO13.PRG0_RGMII2_TD2 */
+			AM64X_IOPAD(0x01e8, PIN_OUTPUT, 2) /* (U6) PRG0_PRU1_GPO14.PRG0_RGMII2_TD3 */
+			AM64X_IOPAD(0x01f0, PIN_OUTPUT, 2) /* (AA4) PRG0_PRU1_GPO16.PRG0_RGMII2_TXC */
+			AM64X_IOPAD(0x01ec, PIN_OUTPUT, 2) /* (U5) PRG0_PRU1_GPO15.PRG0_RGMII2_TX_CTL */
+		>;
+	};
+
+	icssg0_iep0_pins_default: icssg0-iep0-pins {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x01ac, PIN_OUTPUT, 2) /* (W1) PRG0_PRU0_GPO19.PRG0_IEP0_EDC_SYNC_OUT0 */
+		>;
+	};
+};
+
+&icssg0_mdio {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&pru_icssg0_mdio_pins_default>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	icssg0_phy00: ethernet-phy@0 {
+		reg = <0x0>;
+	};
+
+	icssg0_phy01: ethernet-phy@a {
+		reg = <0xa>;
+	};
+};
+
+&icssg0_iep0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&icssg0_iep0_pins_default>;
+};
+
+&main_gpio0 {
+	phy-line-hog {
+		gpio-hog;
+		gpios = <32 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "phy-hog-line";
+	};
+};