arm: dts: zynq: Add Digilent Zybo Z7 board

This add a DTS for the Digilent Zybo Z7 board.
This board is the successor board of Zybo, these are almost the same except
for ps-clk-frequency specifications.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu@cybertrust.co.jp>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

Documentation/devicetree/bindings/arm/xilinx.txt

@@ -17,6 +17,9 @@ Additional compatible strings:
   "xlnx,zynq-zc770-xm012"
   "xlnx,zynq-zc770-xm013"
 
+- Digilent Zybo Z7 board
+  "digilent,zynq-zybo-z7"
+
 ---------------------------------------------------------------
 
 Xilinx Zynq UltraScale+ MPSoC Platforms Device Tree Bindings

arch/arm/boot/dts/Makefile

@@ -1072,7 +1072,8 @@ dtb-$(CONFIG_ARCH_ZYNQ) += \
 	zynq-zc770-xm012.dtb \
 	zynq-zc770-xm013.dtb \
 	zynq-zed.dtb \
-	zynq-zybo.dtb
+	zynq-zybo.dtb \
+	zynq-zybo-z7.dtb
 dtb-$(CONFIG_MACH_ARMADA_370) += \
 	armada-370-db.dtb \
 	armada-370-dlink-dns327l.dtb \

arch/arm/boot/dts/zynq-zybo-z7.dts

@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0+
+/dts-v1/;
+#include "zynq-7000.dtsi"
+
+/ {
+	model = "Zynq ZYBO Z7 Development Board";
+	compatible = "digilent,zynq-zybo-z7", "xlnx,zynq-7000";
+
+	aliases {
+		ethernet0 = &gem0;
+		serial0 = &uart1;
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x20000000>;
+	};
+
+	chosen {
+		bootargs = "";
+		stdout-path = "serial0:115200n8";
+	};
+
+	usb_phy0: phy0 {
+		#phy-cells = <0>;
+		compatible = "usb-nop-xceiv";
+		reset-gpios = <&gpio0 46 1>;
+	};
+};
+
+&clkc {
+	ps-clk-frequency = <33333333>;
+};
+
+&gem0 {
+	status = "okay";
+	phy-mode = "rgmii-id";
+	phy-handle = <&ethernet_phy>;
+
+	ethernet_phy: ethernet-phy@0 {
+		reg = <0>;
+		device_type = "ethernet-phy";
+	};
+};
+
+&sdhci0 {
+	status = "okay";
+};
+
+&uart1 {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+	dr_mode = "host";
+	usb-phy = <&usb_phy0>;
+};