dts: rk3399: add gmac for the rk3399

This change adds the gmac node (i.e. the GMAC Ethernet controller) as
defined in the Linux DTS.
Signed-off-by: NPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: NSimon Glass <sjg@chromium.org>

arch/arm/dts/rk3399.dtsi

@@ -600,6 +600,25 @@
 		interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>;
 	};
 
+        gmac: eth@fe300000 {
+                compatible = "rockchip,rk3399-gmac";
+                reg = <0x0 0xfe300000 0x0 0x10000>;
+                rockchip,grf = <&grf>;
+                interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH 0>;
+                interrupt-names = "macirq";
+                clocks = <&cru SCLK_MAC>, <&cru SCLK_MAC_RX>,
+                         <&cru SCLK_MAC_TX>, <&cru SCLK_MACREF>,
+                         <&cru SCLK_MACREF_OUT>, <&cru ACLK_GMAC>,
+                         <&cru PCLK_GMAC>;
+                clock-names = "stmmaceth", "mac_clk_rx",
+                              "mac_clk_tx", "clk_mac_ref",
+                              "clk_mac_refout", "aclk_mac",
+                              "pclk_mac";
+                resets = <&cru SRST_A_GMAC>;
+                reset-names = "stmmaceth";
+                status = "disabled";
+        };
+
 	spdif: spdif@ff870000 {
 		compatible = "rockchip,rk3399-spdif";
 		reg = <0x0 0xff870000 0x0 0x1000>;
@@ -865,6 +884,42 @@
 			};
 		};
 
+		gmac {
+			rgmii_pins: rgmii-pins {
+				rockchip,pins =
+					/* mac_txclk */
+					<3 17 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_rxclk */
+					<3 14 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_mdio */
+					<3 13 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_txen */
+					<3 12 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_clk */
+					<3 11 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxdv */
+					<3 9 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_mdc */
+					<3 8 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxd1 */
+					<3 7 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxd0 */
+					<3 6 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_txd1 */
+					<3 5 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_txd0 */
+					<3 4 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_rxd3 */
+					<3 3 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxd2 */
+					<3 2 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_txd3 */
+					<3 1 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_txd2 */
+					<3 0 RK_FUNC_1 &pcfg_pull_none_13ma>;
+			};
+		};
+
 		sdmmc {
 			sdmmc_bus1: sdmmc-bus1 {
 				rockchip,pins =