arm64: dts: sparx5: Add Sparx5 SoC DPLL clock

This adds a DPLL clock to the Sparx5 SoC. It is used to generate clock
to misc peripherals, specifically the SDHCI/eMMC controller.

Link: https://lore.kernel.org/r/20200615133242.24911-10-lars.povlsen@microchip.comSigned-off-by: Lars Povlsen <lars.povlsen@microchip.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm64/boot/dts/microchip/sparx5.dtsi

@@ -72,21 +72,30 @@ timer {
 			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
 	};
 
-	clocks: clocks {
-		#address-cells = <2>;
-		#size-cells = <1>;
-		ranges;
+	lcpll_clk: lcpll-clk {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <2500000000>;
+	};
+
+	clks: clock-controller@61110000c {
+		compatible = "microchip,sparx5-dpll";
+		#clock-cells = <1>;
+		clocks = <&lcpll_clk>;
+		reg = <0x6 0x1110000c 0x24>;
+	};
+
 	ahb_clk: ahb-clk {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
 		clock-frequency = <250000000>;
 	};
+
 	sys_clk: sys-clk {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
 		clock-frequency = <625000000>;
 	};
-	};
 
 	axi: axi@600000000 {
 		compatible = "simple-bus";
@@ -161,8 +170,6 @@ uart2_pins: uart2-pins {
 				pins = "GPIO_26", "GPIO_27";
 				function = "uart2";
 			};
-
 		};
-
 	};
 };