ARM: dts: lan966x: add sgpio node

Add the device tree node for the SGPIO IP block reused from the
SparX-5. Keep the node disabled by default.
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Tested-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220502224127.2604333-3-michael@walle.ccSigned-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>

arch/arm/boot/dts/lan966x.dtsi

@@ -223,6 +223,32 @@ gpio: pinctrl@e2004064 {
 			#interrupt-cells = <2>;
 		};
 
+		sgpio: gpio@e2004190 {
+			compatible = "microchip,sparx5-sgpio";
+			reg = <0xe2004190 0x118>;
+			clocks = <&sys_clk>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+
+			sgpio_in: gpio@0 {
+				compatible = "microchip,sparx5-sgpio-bank";
+				reg = <0>;
+				gpio-controller;
+				#gpio-cells = <3>;
+				interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
+				interrupt-controller;
+				#interrupt-cells = <3>;
+			};
+
+			sgpio_out: gpio@1 {
+				compatible = "microchip,sparx5-sgpio-bank";
+				reg = <1>;
+				gpio-controller;
+				#gpio-cells = <3>;
+			};
+		};
+
 		gic: interrupt-controller@e8c11000 {
 			compatible = "arm,gic-400", "arm,cortex-a7-gic";
 			#interrupt-cells = <3>;