[PATCH 1/3] dt-bindings: nvmem: add nuvoton,npcm750-otp

Add device tree bindings for the OTP memory controllers found on
Nuvoton NPCM7xx SoCs.

The NPCM7xx SoCs contain two independent OTP memory arrays:
- Key Storage (OTP1): used for cryptographic keys.
- Fuse Array (OTP2): used for hardware strapping, calibration data,
  and derivative definitions.

Each controller provides up to 1024 bytes of read-only storage.

Signed-off-by: Kuan-Wei Chiu <[email protected]>
---
 .../bindings/nvmem/nuvoton,npcm750-otp.yaml   | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/nuvoton,npcm750-otp.yaml

diff --git a/Documentation/devicetree/bindings/nvmem/nuvoton,npcm750-otp.yaml b/Documentation/devicetree/bindings/nvmem/nuvoton,npcm750-otp.yaml
new file mode 100644
index 000000000000..45bcf72d7c78
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/nuvoton,npcm750-otp.yaml
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/nuvoton,npcm750-otp.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton NPCM7xx OTP (One-Time Programmable) Memory
+
+maintainers:
+  - Kuan-Wei Chiu <[email protected]>
+
+allOf:
+  - $ref: nvmem.yaml#
+
+properties:
+  compatible:
+    enum:
+      - nuvoton,npcm750-key-storage
+      - nuvoton,npcm750-fuse-array
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    otp@f0189000 {
+        compatible = "nuvoton,npcm750-key-storage";
+        reg = <0xf0189000 0x1000>;
+    };
-- 
2.53.0.851.ga537e3e6e9-goog