dt-bindings: mtd: loongson,ls1b-nand-controller: Document the Loongson-2K0500 NAND controller

Add new compatible for the Loongson-2K NAND controller used for Loongson-2K0500 SoC. Acked-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: maoxiaochuan <maoxiaochuan@loongson.cn>
2026-10-25 12:37:11 +08:00 · 2026-02-04 16:41:12 +08:00
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/loongson,ls1b-nand-controller.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson NAND Controller
+
+maintainers:
+  - Keguang Zhang <keguang.zhang@gmail.com>
+  - Binbin Zhou <zhoubinbin@loongson.cn>
+
+description:
+  The Loongson NAND controller abstracts all supported operations,
+  meaning it does not support low-level access to raw NAND flash chips.
+  Moreover, the controller is paired with the DMA engine to perform
+  READ and PROGRAM functions.
+
+allOf:
+  - $ref: nand-controller.yaml
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - 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:
+    minItems: 2
+    maxItems: 3
+
+  reg-names:
+    minItems: 2
+    items:
+      - const: nand
+      - const: nand-dma
+      - const: dma-config
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    const: rxtx
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - dmas
+  - 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:
+  - |
+    nand-controller@1fe78000 {
+        compatible = "loongson,ls1b-nand-controller";
+        reg = <0x1fe78000 0x24>, <0x1fe78040 0x4>;
+        reg-names = "nand", "nand-dma";
+        dmas = <&dma 0>;
+        dma-names = "rxtx";
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        nand@0 {
+            reg = <0>;
+            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>;
+        };
+    };