dt-bindings: gpio: cdns: convert to YAML

Convert Cadence family GPIO controller bindings to DT schema.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Harshit Shah <hshah@axiado.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Author: hshahaxiado

Documentation/devicetree/bindings/gpio/cdns,gpio.txt

@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/cdns,gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cadence GPIO Controller
+
+maintainers:
+  - Jan Kotas <jank@cadence.com>
+
+properties:
+  compatible:
+    const: cdns,gpio-r1p02
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  ngpios:
+    minimum: 1
+    maximum: 32
+
+  gpio-controller: true
+
+  "#gpio-cells":
+    const: 2
+    description: |
+      - First cell is the GPIO line number.
+      - Second cell is flags as defined in <dt-bindings/gpio/gpio.h>,
+        only GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW supported.
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 2
+    description: |
+      - First cell is the GPIO line number used as IRQ.
+      - Second cell is the trigger type, as defined in
+        <dt-bindings/interrupt-controller/irq.h>.
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - gpio-controller
+  - "#gpio-cells"
+
+if:
+  required: [interrupt-controller]
+then:
+  required:
+    - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    gpio0: gpio-controller@fd060000 {
+        compatible = "cdns,gpio-r1p02";
+        reg = <0xfd060000 0x1000>;
+        clocks = <&gpio_clk>;
+
+        interrupt-parent = <&gic>;
+        interrupts = <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>;
+
+        gpio-controller;
+        #gpio-cells = <2>;
+
+        interrupt-controller;
+        #interrupt-cells = <2>;
+    };