dt-bindings: arm: hisilicon: convert LPC controller bindings to json-schema

Convert the Hisilicon Hip06 SoCs implement a Low Pin Count (LPC)
controller binding to DT schema format using json-schema.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20200929141454.2312-18-thunder.leizhen@huawei.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/arm/hisilicon/hisilicon-low-pin-count.txt

-Hisilicon Hip06 Low Pin Count device
-  Hisilicon Hip06 SoCs implement a Low Pin Count (LPC) controller, which
-  provides I/O access to some legacy ISA devices.
-  Hip06 is based on arm64 architecture where there is no I/O space. So, the
-  I/O ports here are not CPU addresses, and there is no 'ranges' property in
-  LPC device node.
-
-Required properties:
-- compatible:  value should be as follows:
-	(a) "hisilicon,hip06-lpc"
-	(b) "hisilicon,hip07-lpc"
-- #address-cells: must be 2 which stick to the ISA/EISA binding doc.
-- #size-cells: must be 1 which stick to the ISA/EISA binding doc.
-- reg: base memory range where the LPC register set is mapped.
-
-Note:
-  The node name before '@' must be "isa" to represent the binding stick to the
-  ISA/EISA binding specification.
-
-Example:
-
-isa@a01b0000 {
-	compatible = "hisilicon,hip06-lpc";
-	#address-cells = <2>;
-	#size-cells = <1>;
-	reg = <0x0 0xa01b0000 0x0 0x1000>;
-
-	ipmi0: bt@e4 {
-		compatible = "ipmi-bt";
-		device_type = "ipmi";
-		reg = <0x01 0xe4 0x04>;
-	};
-};

Documentation/devicetree/bindings/arm/hisilicon/low-pin-count.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/hisilicon/low-pin-count.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Hisilicon HiP06 Low Pin Count device
+
+maintainers:
+  - Wei Xu <xuwei5@hisilicon.com>
+
+description: |
+  Hisilicon HiP06 SoCs implement a Low Pin Count (LPC) controller, which
+  provides I/O access to some legacy ISA devices.
+  HiP06 is based on arm64 architecture where there is no I/O space. So, the
+  I/O ports here are not CPU addresses, and there is no 'ranges' property in
+  LPC device node.
+
+properties:
+  $nodename:
+    pattern: '^isa@[0-9a-f]+$'
+    description: |
+      The node name before '@' must be "isa" to represent the binding stick
+      to the ISA/EISA binding specification.
+
+  compatible:
+    enum:
+      - hisilicon,hip06-lpc
+      - hisilicon,hip07-lpc
+
+  reg:
+    maxItems: 1
+
+  '#address-cells':
+    const: 2
+
+  '#size-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties:
+  type: object
+
+examples:
+  - |
+    isa@a01b0000 {
+        compatible = "hisilicon,hip06-lpc";
+        #address-cells = <2>;
+        #size-cells = <1>;
+        reg = <0xa01b0000 0x1000>;
+
+        ipmi0: bt@e4 {
+            compatible = "ipmi-bt";
+            device_type = "ipmi";
+            reg = <0x01 0xe4 0x04>;
+        };
+    };
+...