arm64: dts: freescale: Add GMAC Ethernet for S32G2 EVB and RDB2 and S32G3 RDB3

Add support for the Ethernet connection over GMAC controller connected to
the Micrel KSZ9031 Ethernet RGMII PHY located on the boards.

The mentioned GMAC controller is one of two network controllers
embedded on the NXP Automotive SoCs S32G2 and S32G3.

The supported boards:
 * EVB:  S32G-VNP-EVB with S32G2 SoC
 * RDB2: S32G-VNP-RDB2
 * RDB3: S32G-VNP-RDB3

Tested-by: Enric Balletbo i Serra <eballetb@redhat.com>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

5 files changed, 164 insertions, 4 deletions

diff --git a/arch/arm64/boot/dts/freescale/s32g2.dtsi b/arch/arm64/boot/dts/freescale/s32g2.dtsi
index d167624d1f0c..51d00dac12de 100644
--- a/arch/arm64/boot/dts/freescale/s32g2.dtsi
+++ b/arch/arm64/boot/dts/freescale/s32g2.dtsi
@@ -3,7 +3,7 @@
  * NXP S32G2 SoC family
  *
  * Copyright (c) 2021 SUSE LLC
- * Copyright 2017-2021, 2024 NXP
+ * Copyright 2017-2021, 2024-2025 NXP
  */
 
 #include <dt-bindings/interrupt-controller/arm-gic.h>
@@ -727,6 +727,62 @@
 			status = "disabled";
 		};
 
+		gmac0: ethernet@4033c000 {
+			compatible = "nxp,s32g2-dwmac";
+			reg = <0x4033c000 0x2000>, /* gmac IP */
+			      <0x4007c004 0x4>;    /* GMAC_0_CTRL_STS */
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "macirq";
+			snps,mtl-rx-config = <&mtl_rx_setup>;
+			snps,mtl-tx-config = <&mtl_tx_setup>;
+			status = "disabled";
+
+			mtl_rx_setup: rx-queues-config {
+				snps,rx-queues-to-use = <5>;
+
+				queue0 {
+				};
+
+				queue1 {
+				};
+
+				queue2 {
+				};
+
+				queue3 {
+				};
+
+				queue4 {
+				};
+			};
+
+			mtl_tx_setup: tx-queues-config {
+				snps,tx-queues-to-use = <5>;
+
+				queue0 {
+				};
+
+				queue1 {
+				};
+
+				queue2 {
+				};
+
+				queue3 {
+				};
+
+				queue4 {
+				};
+			};
+
+			gmac0mdio: mdio {
+				compatible = "snps,dwmac-mdio";
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+		};
+
 		gic: interrupt-controller@50800000 {
 			compatible = "arm,gic-v3";
 			reg = <0x50800000 0x10000>,
diff --git a/arch/arm64/boot/dts/freescale/s32g274a-evb.dts b/arch/arm64/boot/dts/freescale/s32g274a-evb.dts
index c4a195dd67bf..aa40a52f8e53 100644
--- a/arch/arm64/boot/dts/freescale/s32g274a-evb.dts
+++ b/arch/arm64/boot/dts/freescale/s32g274a-evb.dts
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
 /*
  * Copyright (c) 2021 SUSE LLC
- * Copyright 2019-2021, 2024 NXP
+ * Copyright 2019-2021, 2024-2025 NXP
  */
 
 /dts-v1/;
@@ -14,6 +14,7 @@
 	compatible = "nxp,s32g274a-evb", "nxp,s32g2";
 
 	aliases {
+		ethernet0 = &gmac0;
 		serial0 = &uart0;
 	};
 
@@ -43,3 +44,18 @@
 	no-1-8-v;
 	status = "okay";
 };
+
+&gmac0 {
+	clocks = <&clks 24>, <&clks 19>, <&clks 18>, <&clks 15>;
+	clock-names = "stmmaceth", "tx", "rx", "ptp_ref";
+	phy-mode = "rgmii-id";
+	phy-handle = <&rgmiiaphy4>;
+	status = "okay";
+};
+
+&gmac0mdio {
+	/* KSZ 9031 on RGMII */
+	rgmiiaphy4: ethernet-phy@4 {
+		reg = <4>;
+	};
+};
diff --git a/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts b/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts
index 4f58be68c818..ee3121b192e5 100644
--- a/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts
+++ b/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts
@@ -14,6 +14,7 @@
 	compatible = "nxp,s32g274a-rdb2", "nxp,s32g2";
 
 	aliases {
+		ethernet0 = &gmac0;
 		serial0 = &uart0;
 		serial1 = &uart1;
 	};
@@ -77,3 +78,18 @@
 	no-1-8-v;
 	status = "okay";
 };
+
+&gmac0 {
+	clocks = <&clks 24>, <&clks 19>, <&clks 18>, <&clks 15>;
+	clock-names = "stmmaceth", "tx", "rx", "ptp_ref";
+	phy-mode = "rgmii-id";
+	phy-handle = <&rgmiiaphy1>;
+	status = "okay";
+};
+
+&gmac0mdio {
+	/* KSZ 9031 on RGMII */
+	rgmiiaphy1: ethernet-phy@1 {
+		reg = <1>;
+	};
+};
diff --git a/arch/arm64/boot/dts/freescale/s32g3.dtsi b/arch/arm64/boot/dts/freescale/s32g3.dtsi
index be3a582ebc1b..eff7673e7f34 100644
--- a/arch/arm64/boot/dts/freescale/s32g3.dtsi
+++ b/arch/arm64/boot/dts/freescale/s32g3.dtsi
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
 /*
- * Copyright 2021-2024 NXP
+ * Copyright 2021-2025 NXP
  *
  * Authors: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
  *          Ciprian Costea <ciprianmarian.costea@nxp.com>
@@ -804,6 +804,62 @@
 			status = "disabled";
 		};
 
+		gmac0: ethernet@4033c000 {
+			compatible = "nxp,s32g2-dwmac";
+			reg = <0x4033c000 0x2000>, /* gmac IP */
+			      <0x4007c004 0x4>;    /* GMAC_0_CTRL_STS */
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "macirq";
+			snps,mtl-rx-config = <&mtl_rx_setup>;
+			snps,mtl-tx-config = <&mtl_tx_setup>;
+			status = "disabled";
+
+			mtl_rx_setup: rx-queues-config {
+				snps,rx-queues-to-use = <5>;
+
+				queue0 {
+				};
+
+				queue1 {
+				};
+
+				queue2 {
+				};
+
+				queue3 {
+				};
+
+				queue4 {
+				};
+			};
+
+			mtl_tx_setup: tx-queues-config {
+				snps,tx-queues-to-use = <5>;
+
+				queue0 {
+				};
+
+				queue1 {
+				};
+
+				queue2 {
+				};
+
+				queue3 {
+				};
+
+				queue4 {
+				};
+			};
+
+			gmac0mdio: mdio {
+				compatible = "snps,dwmac-mdio";
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+		};
+
 		swt8: watchdog@40500000 {
 			compatible = "nxp,s32g3-swt", "nxp,s32g2-swt";
 			reg = <40500000 0x1000>;
diff --git a/arch/arm64/boot/dts/freescale/s32g399a-rdb3.dts b/arch/arm64/boot/dts/freescale/s32g399a-rdb3.dts
index e94f70ad82d9..326322b62192 100644
--- a/arch/arm64/boot/dts/freescale/s32g399a-rdb3.dts
+++ b/arch/arm64/boot/dts/freescale/s32g399a-rdb3.dts
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
 /*
- * Copyright 2021-2024 NXP
+ * Copyright 2021-2025 NXP
  *
  * NXP S32G3 Reference Design Board 3 (S32G-VNP-RDB3)
  */
@@ -15,6 +15,7 @@
 	compatible = "nxp,s32g399a-rdb3", "nxp,s32g3";
 
 	aliases {
+		ethernet0 = &gmac0;
 		mmc0 = &usdhc0;
 		serial0 = &uart0;
 		serial1 = &uart1;
@@ -93,3 +94,18 @@
 	disable-wp;
 	status = "okay";
 };
+
+&gmac0 {
+	clocks = <&clks 24>, <&clks 19>, <&clks 18>, <&clks 15>;
+	clock-names = "stmmaceth", "tx", "rx", "ptp_ref";
+	phy-mode = "rgmii-id";
+	phy-handle = <&rgmiiaphy1>;
+	status = "okay";
+};
+
+&gmac0mdio {
+	/* KSZ 9031 on RGMII */
+	rgmiiaphy1: ethernet-phy@1 {
+		reg = <1>;
+	};
+};