dt-bindings: ipmi: Convert nuvoton,npcm750-kcs-bmc to DT schema

Convert the nuvoton,npcm750-kcs-bmc binding to DT schema format. It's a
straight-forward conversion.

Signed-off-by: Rob Herring (Arm) <[e-mail]>
Message-ID: <[e-mail]>
Signed-off-by: Corey Minyard <[e-mail]>

Documentation/devicetree/bindings/ipmi/npcm7xx-kcs-bmc.txt

···
-* Nuvoton NPCM KCS (Keyboard Controller Style) IPMI interface
-
-The Nuvoton SOCs (NPCM) are commonly used as BMCs
-(Baseboard Management Controllers) and the KCS interface can be
-used to perform in-band IPMI communication with their host.
-
-Required properties:
-- compatible : should be one of
-    "nuvoton,npcm750-kcs-bmc"
-    "nuvoton,npcm845-kcs-bmc", "nuvoton,npcm750-kcs-bmc"
-- interrupts : interrupt generated by the controller
-- kcs_chan : The KCS channel number in the controller
-
-Example:
-
-    lpc_kcs: lpc_kcs@f0007000 {
-        compatible = "nuvoton,npcm750-lpc-kcs", "simple-mfd", "syscon";
-        reg = <0xf0007000 0x40>;
-        reg-io-width = <1>;
-
-        #address-cells = <1>;
-        #size-cells = <1>;
-        ranges = <0x0 0xf0007000 0x40>;
-
-        kcs1: kcs1@0 {
-            compatible = "nuvoton,npcm750-kcs-bmc";
-            reg = <0x0 0x40>;
-            interrupts = <0 9 4>;
-            kcs_chan = <1>;
-            status = "disabled";
-        };
-
-        kcs2: kcs2@0 {
-            compatible = "nuvoton,npcm750-kcs-bmc";
-            reg = <0x0 0x40>;
-            interrupts = <0 9 4>;
-            kcs_chan = <2>;
-            status = "disabled";
-        };
-    };

Documentation/devicetree/bindings/ipmi/nuvoton,npcm750-kcs-bmc.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ipmi/nuvoton,npcm750-kcs-bmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton NPCM KCS BMC
+
+maintainers:
+  - Avi Fishman <[e-mail]>
+  - Tomer Maimon <[e-mail]>
+  - Tali Perry <[e-mail]>
+
+description:
+  The Nuvoton SOCs (NPCM) are commonly used as BMCs (Baseboard Management
+  Controllers) and the KCS interface can be used to perform in-band IPMI
+  communication with their host.
+
+properties:
+  compatible:
+    oneOf:
+      - const: nuvoton,npcm750-kcs-bmc
+      - items:
+          - enum:
+              - nuvoton,npcm845-kcs-bmc
+          - const: nuvoton,npcm750-kcs-bmc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  kcs_chan:
+    description: The KCS channel number in the controller
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    maximum: 3
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - kcs_chan
+
+additionalProperties: false
+
+examples:
+  - |
+    kcs@0 {
+        compatible = "nuvoton,npcm750-kcs-bmc";
+        reg = <0x0 0x40>;
+        interrupts = <9 4>;
+        kcs_chan = <1>;
+    };