dt-bindings: mtd: nuvoton,ma35d1-nand: add new bindings

Add dt-bindings for the Nuvoton MA35 SoC NAND Controller.

Signed-off-by: Hui-Ping Chen <hpchen0nvt@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Documentation/devicetree/bindings/mtd/nuvoton,ma35d1-nand.yaml

@@ -0,0 +1,95 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/nuvoton,ma35d1-nand.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton MA35D1 NAND Flash Interface (NFI) Controller
+
+maintainers:
+  - Hui-Ping Chen <hpchen0nvt@gmail.com>
+
+allOf:
+  - $ref: nand-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - nuvoton,ma35d1-nand-controller
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+patternProperties:
+  "^nand@[a-f0-9]$":
+    type: object
+    $ref: raw-nand-chip.yaml
+    properties:
+      reg:
+        minimum: 0
+        maximum: 1
+
+      nand-ecc-step-size:
+        enum: [512, 1024]
+
+      nand-ecc-strength:
+        enum: [8, 12, 24]
+
+    required:
+      - reg
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        nand-controller@401A0000 {
+            compatible = "nuvoton,ma35d1-nand-controller";
+            reg = <0x0 0x401A0000 0x0 0x1000>;
+            interrupts = <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&clk NAND_GATE>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            nand@0 {
+                reg = <0>;
+                nand-on-flash-bbt;
+                nand-ecc-step-size = <512>;
+                nand-ecc-strength = <8>;
+
+                partitions {
+                    compatible = "fixed-partitions";
+                    #address-cells = <1>;
+                    #size-cells = <1>;
+
+                    uboot@0 {
+                        label = "nand-uboot";
+                        read-only;
+                        reg = <0x0 0x300000>;
+                    };
+                };
+            };
+        };
+    };
+
+...