dt-bindings: mtd: Convert Denali NAND controller to json-schema

Convert the Denali NAND controller binding to DT schema format.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 148 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/mtd/denali,nand.yaml b/Documentation/devicetree/bindings/mtd/denali,nand.yaml
new file mode 100644
index 000000000000..46e6b6726bc0
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/denali,nand.yaml
@@ -0,0 +1,148 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/denali,nand.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Denali NAND controller
+
+maintainers:
+  - Masahiro Yamada <yamada.masahiro@socionext.com>
+
+properties:
+  compatible:
+    enum:
+      - altr,socfpga-denali-nand
+      - socionext,uniphier-denali-nand-v5a
+      - socionext,uniphier-denali-nand-v5b
+
+  reg-names:
+    description: |
+      There are two register regions:
+        nand_data:  host data/command interface
+        denali_reg: register interface
+    items:
+      - const: nand_data
+      - const: denali_reg
+
+  reg:
+    minItems: 2
+    maxItems: 2
+
+  interrupts:
+    maxItems: 1
+
+  clock-names:
+    description: |
+      There are three clocks:
+        nand:   controller core clock
+        nand_x: bus interface clock
+        ecc:    ECC circuit clock
+    items:
+      - const: nand
+      - const: nand_x
+      - const: ecc
+
+  clocks:
+    minItems: 3
+    maxItems: 3
+
+  reset-names:
+    description: |
+      There are two optional resets:
+        nand: controller core reset
+        reg:  register reset
+    oneOf:
+      - items:
+        - const: nand
+        - const: reg
+      - const: nand
+      - const: reg
+
+  resets:
+    minItems: 1
+    maxItems: 2
+
+allOf:
+  - $ref: nand-controller.yaml
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: altr,socfpga-denali-nand
+    then:
+      patternProperties:
+        "^nand@[a-f0-9]$":
+          type: object
+          properties:
+            nand-ecc-strength:
+              enum:
+                - 8
+                - 15
+            nand-ecc-step-size:
+              enum:
+                - 512
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: socionext,uniphier-denali-nand-v5a
+    then:
+      patternProperties:
+        "^nand@[a-f0-9]$":
+          type: object
+          properties:
+            nand-ecc-strength:
+              enum:
+                - 8
+                - 16
+                - 24
+            nand-ecc-step-size:
+              enum:
+                - 1024
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: socionext,uniphier-denali-nand-v5b
+    then:
+      patternProperties:
+        "^nand@[a-f0-9]$":
+          type: object
+          properties:
+            nand-ecc-strength:
+              enum:
+                - 8
+                - 16
+            nand-ecc-step-size:
+              enum:
+                - 1024
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clock-names
+  - clocks
+
+examples:
+  - |
+    nand-controller@ff900000 {
+        compatible = "altr,socfpga-denali-nand";
+        reg-names = "nand_data", "denali_reg";
+        reg = <0xff900000 0x20>, <0xffb80000 0x1000>;
+        interrupts = <0 144 4>;
+        clock-names = "nand", "nand_x", "ecc";
+        clocks = <&nand_clk>, <&nand_x_clk>, <&nand_ecc_clk>;
+        reset-names = "nand", "reg";
+        resets = <&nand_rst>, <&nand_reg_rst>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        nand@0 {
+                reg = <0>;
+        };
+    };