arm: dts: mt8189: Add ethernet support for Genio 520/720 boards

Add Ethernet support for MediaTek MT8189-based Genio 520 and Genio 720
development boards.

The ethernet interface is disabled by default in the SoC dtsi and
enabled in the board-specific configuration with proper PHY settings.

The ethernet related nodes are not part of current dt submission on the
kernel [1] and come from downstream u-boot. When switching to
OF_UPSTREAM we should add them back.

[1]: https://lore.kernel.org/all/20251203-add-mediatek-genio-520-720-evk-v1-3-df794b2a30ae@collabora.com/

Signed-off-by: Julien Stephan <[email protected]>
Reviewed-by: Macpaul Lin <[email protected]>
Link: https://patch.msgid.link/20260429-add-ethernet-support-for-genio-520-720-v4-8-be54e17239b7@baylibre.com
Signed-off-by: David Lechner <[email protected]>

2 files changed, 160 insertions, 0 deletions

diff --git a/arch/arm/dts/mt8189.dtsi b/arch/arm/dts/mt8189.dtsi
index 891d3249ecd..c965b00bb5c 100644
--- a/arch/arm/dts/mt8189.dtsi
+++ b/arch/arm/dts/mt8189.dtsi
@@ -381,6 +381,83 @@
 			#reset-cells = <1>;
 		};
 
+		eth: ethernet@1101a000 {
+			compatible = "mediatek,mt8189-gmac", "snps,dwmac-5.10a";
+			reg = <0 0x1101a000 0 0x4000>;
+			interrupts = <GIC_SPI 475 IRQ_TYPE_LEVEL_HIGH 0>;
+			interrupt-names = "macirq";
+			clock-names = "mac_main",
+				      "ptp_ref";
+			clocks = <&topckgen_clk CLK_TOP_ETH_250M_SEL>,
+				 <&topckgen_clk CLK_TOP_ETH_62P4M_PTP_SEL>;
+			assigned-clocks = <&topckgen_clk CLK_TOP_ETH_250M_SEL>,
+					  <&topckgen_clk CLK_TOP_ETH_62P4M_PTP_SEL>,
+					  <&topckgen_clk CLK_TOP_ETH_50M_RMII_SEL>;
+			assigned-clock-parents = <&topckgen_clk CLK_TOP_ETHPLL_D2>,
+						 <&topckgen_clk CLK_TOP_ETHPLL_D8>,
+						 <&topckgen_clk CLK_TOP_ETHPLL_D10>;
+			mediatek,pericfg = <&pericfg_ao_clk>;
+			snps,axi-config = <&stmmac_axi_setup>;
+			snps,mtl-rx-config = <&mtl_rx_setup>;
+			snps,mtl-tx-config = <&mtl_tx_setup>;
+			snps,txpbl = <16>;
+			snps,rxpbl = <16>;
+			clk-csr = <4>;
+			status = "disabled";
+
+			stmmac_axi_setup: stmmac-axi-config {
+				snps,wr-osr-lmt = <0x7>;
+				snps,rd-osr-lmt = <0x7>;
+				snps,blen = <0 0 0 0 16 8 4>;
+			};
+
+			mtl_rx_setup: rx-queues-config {
+				snps,rx-queues-to-use = <4>;
+				snps,rx-sched-sp;
+				queue0 {
+					snps,dcb-algorithm;
+					snps,map-to-dma-channel = <0x0>;
+				};
+				queue1 {
+					snps,dcb-algorithm;
+					snps,map-to-dma-channel = <0x0>;
+				};
+				queue2 {
+					snps,dcb-algorithm;
+					snps,map-to-dma-channel = <0x0>;
+				};
+				queue3 {
+					snps,dcb-algorithm;
+					snps,map-to-dma-channel = <0x0>;
+				};
+			};
+
+			mtl_tx_setup: tx-queues-config {
+				snps,tx-queues-to-use = <4>;
+				snps,tx-sched-wrr;
+				queue0 {
+					snps,weight = <0x10>;
+					snps,dcb-algorithm;
+					snps,priority = <0x0>;
+				};
+				queue1 {
+					snps,weight = <0x11>;
+					snps,dcb-algorithm;
+					snps,priority = <0x1>;
+				};
+				queue2 {
+					snps,weight = <0x12>;
+					snps,dcb-algorithm;
+					snps,priority = <0x2>;
+				};
+				queue3 {
+					snps,weight = <0x13>;
+					snps,dcb-algorithm;
+					snps,priority = <0x3>;
+				};
+			};
+		};
+
 		topckgen_clk: clock-controller@10000000 {
 			compatible = "mediatek,mt8189-topckgen", "syscon";
 			reg = <0 0x10000000 0 0x1000>;
diff --git a/arch/arm/dts/mt8371-genio-common.dtsi b/arch/arm/dts/mt8371-genio-common.dtsi
index 1d4728e3732..123133b0eb8 100644
--- a/arch/arm/dts/mt8371-genio-common.dtsi
+++ b/arch/arm/dts/mt8371-genio-common.dtsi
@@ -312,6 +312,68 @@
 			bias-pull-up;
 		};
 	};
+
+	eth_default_pins: eth-default-pins {
+		txd-pins {
+			pinmux = <PINMUX_GPIO119__FUNC_GBE_TXD3>,
+				 <PINMUX_GPIO120__FUNC_GBE_TXD2>,
+				 <PINMUX_GPIO121__FUNC_GBE_TXD1>,
+				 <PINMUX_GPIO122__FUNC_GBE_TXD0>;
+			drive-strength = <MTK_DRIVE_8mA>;
+		};
+		cc-pins {
+			pinmux = <PINMUX_GPIO127__FUNC_GBE_TXC>,
+				 <PINMUX_GPIO130__FUNC_GBE_TXEN>,
+				 <PINMUX_GPIO129__FUNC_GBE_RXDV>,
+				 <PINMUX_GPIO128__FUNC_GBE_RXC>;
+			drive-strength = <MTK_DRIVE_8mA>;
+		};
+		rxd-pins {
+			pinmux = <PINMUX_GPIO123__FUNC_GBE_RXD3>,
+				 <PINMUX_GPIO124__FUNC_GBE_RXD2>,
+				 <PINMUX_GPIO125__FUNC_GBE_RXD1>,
+				 <PINMUX_GPIO126__FUNC_GBE_RXD0>;
+			drive-strength = <MTK_DRIVE_8mA>;
+		};
+		mdio-pins {
+			pinmux = <PINMUX_GPIO131__FUNC_GBE_MDC>,
+				 <PINMUX_GPIO132__FUNC_GBE_MDIO>;
+			drive-strength = <MTK_DRIVE_8mA>;
+			input-enable;
+		};
+		power-pins {
+			pinmux = <PINMUX_GPIO133__FUNC_GPIO133>,
+				 <PINMUX_GPIO134__FUNC_GPIO134>;
+			output-high;
+		};
+	};
+
+	eth_sleep_pins: eth-sleep-pins {
+		txd-pins {
+			pinmux = <PINMUX_GPIO119__FUNC_GPIO119>,
+				 <PINMUX_GPIO120__FUNC_GPIO120>,
+				 <PINMUX_GPIO121__FUNC_GPIO121>,
+				 <PINMUX_GPIO122__FUNC_GPIO122>;
+		};
+		cc-pins {
+			pinmux = <PINMUX_GPIO127__FUNC_GPIO127>,
+				 <PINMUX_GPIO130__FUNC_GPIO130>,
+				 <PINMUX_GPIO129__FUNC_GPIO129>,
+				 <PINMUX_GPIO128__FUNC_GPIO128>;
+		};
+		rxd-pins {
+			pinmux = <PINMUX_GPIO123__FUNC_GPIO123>,
+				 <PINMUX_GPIO124__FUNC_GPIO124>,
+				 <PINMUX_GPIO125__FUNC_GPIO125>,
+				 <PINMUX_GPIO126__FUNC_GPIO126>;
+		};
+		mdio-pins {
+			pinmux = <PINMUX_GPIO131__FUNC_GPIO131>,
+				 <PINMUX_GPIO132__FUNC_GPIO132>;
+			input-disable;
+			bias-disable;
+		};
+	};
 };
 
 &pmic {
@@ -342,3 +404,24 @@
 	vbus-supply = <&usb_p4_vbus>;
 	status = "okay";
 };
+
+&eth {
+	/*
+	 * TX clock is provided by MAC
+	 */
+	phy-mode = "rgmii-rxid";
+	phy-handle = <&phy>;
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&eth_default_pins>;
+	pinctrl-1 = <&eth_sleep_pins>;
+	status = "okay";
+	mdio {
+		compatible = "snps,dwmac-mdio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		phy: phy@0 {
+			compatible = "ethernet-phy-idc0ff.0421";
+			reg = <0>;
+		};
+	};
+};