riscv: dts: microchip: update peripherals in icicle kit device tree

Assorted minor changes to the MPFS/Icicle kit device tree:

- enable mmuart4 instead of mmuart0
- remove sifive pdma
- split memory node to match updated fpga design
- move stdout path to serial1 to avoid collision with
        bootloader running on the e51

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

Author: ConchuOD

arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts

@@ -20,20 +20,29 @@
 		serial1 = &mmuart1;
 		serial2 = &mmuart2;
 		serial3 = &mmuart3;
+		serial4 = &mmuart4;
 	};
 
 	chosen {
-		stdout-path = "serial0:115200n8";
+		stdout-path = "serial1:115200n8";
 	};
 
 	cpus {
 		timebase-frequency = <RTCCLK_FREQ>;
 	};
 
-	memory@80000000 {
+	ddrc_cache_lo: memory@80000000 {
 		device_type = "memory";
-		reg = <0x0 0x80000000 0x0 0x40000000>;
+		reg = <0x0 0x80000000 0x0 0x2e000000>;
 		clocks = <&clkcfg CLK_DDRC>;
+		status = "okay";
+	};
+
+	ddrc_cache_hi: memory@1000000000 {
+		device_type = "memory";
+		reg = <0x10 0x0 0x0 0x40000000>;
+		clocks = <&clkcfg CLK_DDRC>;
+		status = "okay";
 	};
 
 	soc {
@@ -44,10 +53,6 @@
 	clock-frequency = <600000000>;
 };
 
-&mmuart0 {
-	status = "okay";
-};
-
 &mmuart1 {
 	status = "okay";
 };
@@ -60,6 +65,10 @@
 	status = "okay";
 };
 
+&mmuart4 {
+	status = "okay";
+};
+
 &mmc {
 	status = "okay";
 

arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi

@@ -174,15 +174,6 @@
 					      <&cpu4_intc 3>, <&cpu4_intc 7>;
 		};
 
-		dma@3000000 {
-			compatible = "sifive,fu540-c000-pdma";
-			reg = <0x0 0x3000000 0x0 0x8000>;
-			interrupt-parent = <&plic>;
-			interrupts = <23>, <24>, <25>, <26>, <27>, <28>, <29>,
-				     <30>;
-			#dma-cells = <1>;
-		};
-
 		plic: interrupt-controller@c000000 {
 			#interrupt-cells = <1>;
 			compatible = "sifive,fu540-c000-plic", "sifive,plic-1.0.0";
@@ -212,7 +203,7 @@
 			interrupts = <90>;
 			current-speed = <115200>;
 			clocks = <&clkcfg CLK_MMUART0>;
-			status = "disabled";
+			status = "disabled"; /* Reserved for the HSS */
 		};
 
 		mmuart1: serial@20100000 {
@@ -251,6 +242,18 @@
 			status = "disabled";
 		};
 
+		mmuart4: serial@20106000 {
+			compatible = "ns16550a";
+			reg = <0x0 0x20106000 0x0 0x400>;
+			reg-io-width = <4>;
+			reg-shift = <2>;
+			interrupt-parent = <&plic>;
+			interrupts = <94>;
+			clocks = <&clkcfg CLK_MMUART4>;
+			current-speed = <115200>;
+			status = "disabled";
+		};
+
 		/* Common node entry for emmc/sd */
 		mmc: mmc@20008000 {
 			compatible = "microchip,mpfs-sd4hc", "cdns,sd4hc";