ARM: dts: rockchip: Add Ethernet GMAC node for RV1126

Rockchip RV1126 has GMAC 10/100/1000M ethernet controller

Co-Developed-by: Jagan Teki <[e-mail]>
Signed-off-by: Anand Moon <[e-mail]>
Signed-off-by: Jagan Teki <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Heiko Stuebner <[e-mail]>

arch/arm/boot/dts/rv1126.dtsi

···
 		clock-names = "pclk", "timer";
 	};
 
+	gmac: ethernet@ffc40000 {
+		compatible = "rockchip,rv1126-gmac", "snps,dwmac-4.20a";
+		reg = <0xffc40000 0x4000>;
+		interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "macirq", "eth_wake_irq";
+		rockchip,grf = <&grf>;
+		clocks = <&cru CLK_GMAC_SRC>, <&cru CLK_GMAC_TX_RX>,
+			 <&cru CLK_GMAC_TX_RX>, <&cru CLK_GMAC_REF>,
+			 <&cru ACLK_GMAC>, <&cru PCLK_GMAC>,
+			 <&cru CLK_GMAC_TX_RX>, <&cru CLK_GMAC_PTPREF>;
+		clock-names = "stmmaceth", "mac_clk_rx",
+			      "mac_clk_tx", "clk_mac_ref",
+			      "aclk_mac", "pclk_mac",
+			      "clk_mac_speed", "ptp_ref";
+		resets = <&cru SRST_GMAC_A>;
+		reset-names = "stmmaceth";
+
+		snps,mixed-burst;
+		snps,tso;
+
+		snps,axi-config = <&stmmac_axi_setup>;
+		snps,mtl-rx-config = <&mtl_rx_setup>;
+		snps,mtl-tx-config = <&mtl_tx_setup>;
+		status = "disabled";
+
+		mdio: mdio {
+			compatible = "snps,dwmac-mdio";
+			#address-cells = <0x1>;
+			#size-cells = <0x0>;
+		};
+
+		stmmac_axi_setup: stmmac-axi-config {
+			snps,wr_osr_lmt = <4>;
+			snps,rd_osr_lmt = <8>;
+			snps,blen = <0 0 0 0 16 8 4>;
+		};
+
+		mtl_rx_setup: rx-queues-config {
+			snps,rx-queues-to-use = <1>;
+			queue0 {};
+		};
+
+		mtl_tx_setup: tx-queues-config {
+			snps,tx-queues-to-use = <1>;
+			queue0 {};
+		};
+	};
+
 	emmc: mmc@ffc50000 {
 		compatible = "rockchip,rv1126-dw-mshc", "rockchip,rk3288-dw-mshc";
 		reg = <0xffc50000 0x4000>;