dt-bindings: mtd: loongson,ls1b-nand-controller: Document the Loongson-2K1000 NAND controller

Add new compatible for the Loongson-2K NAND controller used for
Loongson-2K1000 SoC.

Reviewed-by: Rob Herring (Arm) <[e-mail]>
Signed-off-by: Binbin Zhou <[e-mail]>
Signed-off-by: Miquel Raynal <[e-mail]>

Documentation/devicetree/bindings/mtd/loongson,ls1b-nand-controller.yaml

···
           - loongson,ls1b-nand-controller
           - loongson,ls1c-nand-controller
           - loongson,ls2k0500-nand-controller
+          - loongson,ls2k1000-nand-controller
       - items:
           - enum:
               - loongson,ls1a-nand-controller
           - const: loongson,ls1b-nand-controller
 
   reg:
-    maxItems: 2
+    minItems: 2
+    maxItems: 3
 
   reg-names:
+    minItems: 2
     items:
       - const: nand
       - const: nand-dma
+      - const: dma-config
 
   dmas:
     maxItems: 1
···
   - dma-names
 
 unevaluatedProperties: false
+
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - loongson,ls2k1000-nand-controller
+
+then:
+  properties:
+    reg:
+      minItems: 3
+    reg-names:
+      minItems: 3
+
+else:
+  properties:
+    reg:
+      maxItems: 2
+    reg-names:
+      maxItems: 2
 
 examples:
   - |
···
             label = "ls1x-nand";
             nand-use-soft-ecc-engine;
             nand-ecc-algo = "hamming";
+        };
+    };
+
+  - |
+    nand-controller@1fe26000 {
+        compatible = "loongson,ls2k1000-nand-controller";
+        reg = <0x1fe26000 0x24>,
+              <0x1fe26040 0x4>,
+              <0x1fe00438 0x8>;
+        reg-names = "nand", "nand-dma", "dma-config";
+        dmas = <&apbdma0 0>;
+        dma-names = "rxtx";
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        nand@0 {
+            reg = <0>;
+            label = "ls2k1000-nand";
+            nand-use-soft-ecc-engine;
+            nand-ecc-algo = "bch";
+            nand-ecc-strength = <8>;
+            nand-ecc-step-size = <512>;
         };
     };