LoongArch: dts: loongson-2k0500: Add nand controller support

The module is supported, enable it.

Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: maoxiaochuan <maoxiaochuan@loongson.cn>

arch/loongarch/boot/dts/loongson-2k0500-ref.dts

@@ -41,6 +41,25 @@
 	};
 };
 
+&apbdma0 {
+	status = "okay";
+};
+
+&nand {
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+	nand@0 {
+		reg = <0>;
+		label = "ls2k0500-nand";
+		nand-use-soft-ecc-engine;
+		nand-ecc-algo = "bch";
+		nand-ecc-strength = <8>;
+		nand-ecc-step-size = <512>;
+	};
+};
+
 &apbdma3 {
 	status = "okay";
 };

arch/loongarch/boot/dts/loongson-2k0500.dtsi

@@ -84,7 +84,7 @@
 			clock-names = "ref_100m";
 		};
 
-		dma-controller@1fe10c00 {
+		apbdma0: dma-controller@1fe10c00 {
 			compatible = "loongson,ls2k0500-apbdma", "loongson,ls2k1000-apbdma";
 			reg = <0 0x1fe10c00 0 0x8>;
 			interrupt-parent = <&eiointc>;
@@ -172,6 +172,16 @@
 			interrupts = <3>;
 		};
 
+		nand: nand-controller@1ff58000 {
+			compatible = "loongson,ls2k0500-nand-controller";
+			reg = <0 0x1ff58000 0 0x24>,
+			      <0 0x1ff58040 0 0x4>;
+			reg-names = "nand", "nand-dma";
+			dmas = <&apbdma0 0>;
+			dma-names = "rxtx";
+			status = "disabled";
+		};
+
 		pwm@1ff5c000 {
 			compatible = "loongson,ls2k0500-pwm", "loongson,ls7a-pwm";
 			reg = <0x0 0x1ff5c000 0x0 0x10>;