dt-bindings: i2c: brcm,kona-i2c: convert to YAML

Changes during conversion:
  - add used, but previously undocumented SoC-specific compatibles
  - drop references to SoCs that are not upstream
  - add supported clock frequencies

Signed-off-by: Stanislav Jakubek <stano.jakubek@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

Author: Stanislav Jakubek

Documentation/devicetree/bindings/i2c/brcm,kona-i2c.txt

@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/brcm,kona-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom Kona family I2C controller
+
+maintainers:
+  - Florian Fainelli <f.fainelli@gmail.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - brcm,bcm11351-i2c
+          - brcm,bcm21664-i2c
+          - brcm,bcm23550-i2c
+      - const: brcm,kona-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    enum: [ 100000, 400000, 1000000, 3400000 ]
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-frequency
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c@3e016000 {
+        compatible = "brcm,bcm11351-i2c", "brcm,kona-i2c";
+        reg = <0x3e016000 0x80>;
+        interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&bsc1_clk>;
+        clock-frequency = <400000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };
+...