dt-bindings: mips: add CPU bindings for MIPS architecture

Add the yaml binding for available CPUs in MIPS architecture.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@fungible.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Author: paraka

Documentation/devicetree/bindings/mips/brcm/brcm,bmips.txt

@@ -0,0 +1,115 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mips/cpus.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MIPS CPUs bindings
+
+maintainers:
+  - Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+  - 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
+
+description: |
+  The device tree allows to describe the layout of CPUs in a system through
+  the "cpus" node, which in turn contains a number of subnodes (ie "cpu")
+  defining properties for every CPU.
+
+properties:
+  compatible:
+    enum:
+      - brcm,bmips3300
+      - brcm,bmips4350
+      - brcm,bmips4380
+      - brcm,bmips5000
+      - brcm,bmips5200
+      - ingenic,xburst-mxu1.0
+      - ingenic,xburst-fpu1.0-mxu1.1
+      - ingenic,xburst-fpu2.0-mxu2.0
+      - ingenic,xburst2-fpu2.1-mxu2.1-smt
+      - loongson,gs264
+      - mips,m14Kc
+      - mips,mips4Kc
+      - mips,mips4KEc
+      - mips,mips24Kc
+      - mips,mips24KEc
+      - mips,mips74Kc
+      - mips,mips1004Kc
+      - mti,interaptiv
+      - mti,mips24KEc
+      - mti,mips14KEc
+      - mti,mips14Kc
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  device_type: true
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ingenic,xburst-mxu1.0
+              - ingenic,xburst-fpu1.0-mxu1.1
+              - ingenic,xburst-fpu2.0-mxu2.0
+              - ingenic,xburst2-fpu2.1-mxu2.1-smt
+    then:
+      required:
+        - device_type
+        - clocks
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    cpus {
+      #size-cells = <0>;
+      #address-cells = <1>;
+
+      cpu@0 {
+        compatible = "mips,mips1004Kc";
+        device_type = "cpu";
+        reg = <0>;
+      };
+
+      cpu@1 {
+        compatible = "mips,mips1004Kc";
+        device_type = "cpu";
+        reg = <1>;
+      };
+    };
+
+  - |
+    // Example 2 (Ingenic CPU)
+    #include <dt-bindings/clock/ingenic,jz4780-cgu.h>
+
+    cpus {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      cpu@0 {
+        compatible = "ingenic,xburst-fpu1.0-mxu1.1";
+        device_type = "cpu";
+        reg = <0>;
+
+        clocks = <&cgu JZ4780_CLK_CPU>;
+      };
+
+      cpu@1 {
+        compatible = "ingenic,xburst-fpu1.0-mxu1.1";
+        device_type = "cpu";
+        reg = <1>;
+
+        clocks = <&cgu JZ4780_CLK_CORE1>;
+      };
+    };
+...