dt-bindings:iio:adc:marvell,berlin2-adc yaml conversion

Part of a general move of IIO bindings over to yaml.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Antoine Tenart <antoine.tenart@free-electrons.com>
Link: https://lore.kernel.org/r/20200909175946.395313-6-jic23@kernel.org

Documentation/devicetree/bindings/iio/adc/marvell,berlin2-adc.yaml

@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/marvell,berlin2-adc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Berlin 2 Analog to Digital Converter (ADC)
+
+maintainers:
+  - Antoine Tenart <antoine.tenart@free-electrons.com>
+
+description:
+  The Berlin ADC has 8 channels, with one connected to a temperature sensor.
+  It is part of the system controller register set. The ADC node should be a
+  sub-node of the system controller node.
+
+properties:
+  compatible:
+    const: marvell,berlin2-adc
+
+  interrupts:
+    minItems: 2
+    maxItems: 2
+
+  interrupt-names:
+    items:
+      - const: adc
+      - const: tsen
+
+  "#io-channel-cells":
+    const: 1
+
+required:
+  - compatible
+  - interrupts
+  - interrupt-names
+
+additionalProperties: false
+
+examples:
+  - |
+    sysctrl {
+        adc {
+            compatible = "marvell,berlin2-adc";
+            interrupt-parent = <&sic>;
+            interrupts = <12>, <14>;
+            interrupt-names = "adc", "tsen";
+        };
+    };
+...