[PATCH v4 2/2] arm64: dts: ti: k3-am62a7: Add overlay for second CPSW3G Port

[Chintan Vankar <c-vankar@ti.com>]

From: Siddharth Vadapalli <s-vadapalli@ti.com>

The SK-Ethernet-DC01 Add-On Ethernet Card for AM62A7-SK board supports
RGMII mode.

Add overlay to enable the second CPSW3G port in RGMII-RXID mode with the
Add-On Ethernet Card.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Chintan Vankar <c-vankar@tii.com>
Reviewed-by: Ravi Gunasekaran <r-gunasekaran@ti.com>
---

Link to v3:
https://lore.kernel.org/r/20240429101739.2770090-3-c-vankar@ti.com/

Changes from v3 to v4:
- No changes.

 arch/arm64/boot/dts/ti/Makefile               |  3 +
 .../dts/ti/k3-am62a7-sk-ethernet-dc01.dtso    | 62 +++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am62a7-sk-ethernet-dc01.dtso

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 8a4bdf87e2d4..7f9f0d3b9362 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -31,6 +31,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am62-lp-sk-nand.dtbo
 # Boards with AM62Ax SoC
 dtb-$(CONFIG_ARCH_K3) += k3-am62a7-sk.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am62a7-phyboard-lyra-rdk.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am62a7-sk-ethernet-dc01.dtbo
 
 # Boards with AM62Px SoC
 dtb-$(CONFIG_ARCH_K3) += k3-am62p5-sk.dtb
@@ -160,6 +161,8 @@ k3-am62a7-sk-csi2-ov5640-dtbs := k3-am62a7-sk.dtb \
 	k3-am62x-sk-csi2-ov5640.dtbo
 k3-am62a7-sk-csi2-tevi-ov5640-dtbs := k3-am62a7-sk.dtb \
 	k3-am62x-sk-csi2-tevi-ov5640.dtbo
+k3-am62a7-sk-ethernet-dc01-dtbs := k3-am62a7-sk.dtb \
+	k3-am62a7-sk-ethernet-dc01.dtbo
 k3-am62a7-sk-hdmi-audio-dtbs := k3-am62a7-sk.dtb k3-am62x-sk-hdmi-audio.dtbo
 k3-am62p5-sk-csi2-imx219-dtbs := k3-am62p5-sk.dtb \
 	k3-am62x-sk-csi2-imx219.dtbo
diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk-ethernet-dc01.dtso b/arch/arm64/boot/dts/ti/k3-am62a7-sk-ethernet-dc01.dtso
new file mode 100644
index 000000000000..b06362de6642
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk-ethernet-dc01.dtso
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/**
+ * DT Overlay for second CPSW3G port in RGMII mode using SK-ETHERNET-DC01
+ * Add-On Daughtercard with AM62A7-SK.
+ *
+ * Copyright (C) 2024-2025 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/net/ti-dp83867.h>
+#include "k3-pinctrl.h"
+
+&{/} {
+	aliases {
+		ethernet1 = "/bus@f0000/ethernet@8000000/ethernet-ports/port@2";
+	};
+};
+
+&cpsw3g {
+	pinctrl-0 = <&main_rgmii1_pins_default>,
+		    <&main_rgmii2_pins_default>;
+};
+
+&cpsw_port2 {
+	status = "okay";
+	phy-mode = "rgmii-rxid";
+	phy-handle = <&cpsw3g_phy1>;
+};
+
+&cpsw3g_mdio {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	cpsw3g_phy1: ethernet-phy@1 {
+		reg = <1>;
+		ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
+		ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
+		ti,min-output-impedance;
+	};
+};
+
+&main_pmx0 {
+	main_rgmii2_pins_default: main-rgmii2-default-pins {
+		pinctrl-single,pins = <
+			AM62AX_IOPAD(0x0184, PIN_INPUT, 0) /* (AA21) RGMII2_RD0 */
+			AM62AX_IOPAD(0x0188, PIN_INPUT, 0) /* (Y20) RGMII2_RD1 */
+			AM62AX_IOPAD(0x018c, PIN_INPUT, 0) /* (AB21) RGMII2_RD2 */
+			AM62AX_IOPAD(0x0190, PIN_INPUT, 0) /* (AB20) RGMII2_RD3 */
+			AM62AX_IOPAD(0x0180, PIN_INPUT, 0) /* (AA20) RGMII2_RXC */
+			AM62AX_IOPAD(0x017c, PIN_INPUT, 0) /* (W18) RGMII2_RX_CTL */
+			AM62AX_IOPAD(0x016c, PIN_INPUT, 0) /* (AA19) RGMII2_TD0 */
+			AM62AX_IOPAD(0x0170, PIN_INPUT, 0) /* (Y18) RGMII2_TD1 */
+			AM62AX_IOPAD(0x0174, PIN_INPUT, 0) /* (AA18) RGMII2_TD2 */
+			AM62AX_IOPAD(0x0178, PIN_INPUT, 0) /* (W17) RGMII2_TD3 */
+			AM62AX_IOPAD(0x0168, PIN_INPUT, 0) /* (AB19) RGMII2_TXC */
+			AM62AX_IOPAD(0x0164, PIN_INPUT, 0) /* (Y19) RGMII2_TX_CTL */
+		>;
+	};
+};
-- 
2.34.1