arm64: dts: rockchip: enable gmac node on quartz64-a

Enable the gmac controller on the Pine64 Quartz64 Model A.
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Link: https://lore.kernel.org/r/20210728180034.717953-8-pgwipeout@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts

@@ -11,6 +11,7 @@ / {
 	compatible = "pine64,quartz64-a", "rockchip,rk3566";
 
 	aliases {
+		ethernet0 = &gmac1;
 		mmc0 = &sdmmc0;
 		mmc1 = &sdhci;
 	};
@@ -19,6 +20,13 @@ chosen: chosen {
 		stdout-path = "serial2:1500000n8";
 	};
 
+	gmac1_clkin: external-gmac1-clock {
+		compatible = "fixed-clock";
+		clock-frequency = <125000000>;
+		clock-output-names = "gmac1_clkin";
+		#clock-cells = <0>;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
@@ -116,6 +124,29 @@ &cpu3 {
 	cpu-supply = <&vdd_cpu>;
 };
 
+&gmac1 {
+	assigned-clocks = <&cru SCLK_GMAC1_RX_TX>, <&cru SCLK_GMAC1_RGMII_SPEED>, <&cru SCLK_GMAC1>;
+	assigned-clock-parents = <&cru SCLK_GMAC1_RGMII_SPEED>, <&cru SCLK_GMAC1>, <&gmac1_clkin>;
+	clock_in_out = "input";
+	phy-supply = <&vcc_3v3>;
+	phy-mode = "rgmii";
+	pinctrl-names = "default";
+	pinctrl-0 = <&gmac1m0_miim
+		     &gmac1m0_tx_bus2
+		     &gmac1m0_rx_bus2
+		     &gmac1m0_rgmii_clk
+		     &gmac1m0_clkinout
+		     &gmac1m0_rgmii_bus>;
+	snps,reset-gpio = <&gpio0 RK_PC3 GPIO_ACTIVE_LOW>;
+	snps,reset-active-low;
+	/* Reset time is 20ms, 100ms for rtl8211f */
+	snps,reset-delays-us = <0 20000 100000>;
+	tx_delay = <0x30>;
+	rx_delay = <0x10>;
+	phy-handle = <&rgmii_phy1>;
+	status = "okay";
+};
+
 &i2c0 {
 	status = "okay";
 
@@ -336,6 +367,13 @@ regulator-state-mem {
 	};
 };
 
+&mdio1 {
+	rgmii_phy1: ethernet-phy@0 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <0>;
+	};
+};
+
 &pinctrl {
 	bt {
 		bt_enable_h: bt-enable-h {