ARM: zynq: add gem support

The zynq includes a Cadence GEM IP core. This is compatible with the macb driver.
Add it to the zynq-7000 DT.
Signed-off-by: NSteffen Trumtrar <s.trumtrar@pengutronix.de>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Josh Cartwright <josh.cartwright@ni.com>
[soren: rebased to current Linus tree, added zc706 + zed support, moved phy-mode property to board level dtses]
Signed-off-by: NSoren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

arch/arm/boot/dts/zynq-7000.dtsi

@@ -65,6 +65,24 @@
 			interrupts = <0 50 4>;
 		};
 
+		gem0: ethernet@e000b000 {
+			compatible = "cdns,gem";
+			reg = <0xe000b000 0x4000>;
+			status = "disabled";
+			interrupts = <0 22 4>;
+			clocks = <&clkc 30>, <&clkc 30>, <&clkc 13>;
+			clock-names = "pclk", "hclk", "tx_clk";
+		};
+
+		gem1: ethernet@e000c000 {
+			compatible = "cdns,gem";
+			reg = <0xe000c000 0x4000>;
+			status = "disabled";
+			interrupts = <0 45 4>;
+			clocks = <&clkc 31>, <&clkc 31>, <&clkc 14>;
+			clock-names = "pclk", "hclk", "tx_clk";
+		};
+
 		slcr: slcr@f8000000 {
 			compatible = "xlnx,zynq-slcr";
 			reg = <0xF8000000 0x1000>;

arch/arm/boot/dts/zynq-zc702.dts

@@ -29,6 +29,11 @@
 
 };
 
+&gem0 {
+	status = "okay";
+	phy-mode = "rgmii";
+};
+
 &uart1 {
 	status = "okay";
 };

arch/arm/boot/dts/zynq-zc706.dts

@@ -30,6 +30,11 @@
 
 };
 
+&gem0 {
+	status = "okay";
+	phy-mode = "rgmii";
+};
+
 &uart1 {
 	status = "okay";
 };

arch/arm/boot/dts/zynq-zed.dts

@@ -30,6 +30,11 @@
 
 };
 
+&gem0 {
+	status = "okay";
+	phy-mode = "rgmii";
+};
+
 &uart1 {
 	status = "okay";
 };