dt-bindings:iio:dac:ti,dac7311 yaml conversion

Very simple conversion of this binding from txt to yaml.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Charles-Antoine Couret <charles-antoine.couret@essensium.com>
Link: https://lore.kernel.org/r/20201031134110.724233-14-jic23@kernel.org

Documentation/devicetree/bindings/iio/dac/ti,dac7311.txt

@@ -1,23 +0,0 @@
-TI DAC7311 device tree bindings
-
-Required properties:
-- compatible: must be set to:
-	* "ti,dac7311"
-	* "ti,dac6311"
-	* "ti,dac5311"
-- reg: spi chip select number for the device
-- vref-supply: The regulator supply for ADC reference voltage
-
-Optional properties:
-- spi-max-frequency: Max SPI frequency to use
-
-Example:
-
-	spi_master {
-		dac@0 {
-			compatible = "ti,dac7311";
-			reg = <0>; /* CS0 */
-			spi-max-frequency = <1000000>;
-			vref-supply = <&vdd_supply>;
-		};
-	};

Documentation/devicetree/bindings/iio/dac/ti,dac7311.yaml

@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/ti,dac7311.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments DAC5311 and similar SPI DACs
+
+maintainers:
+  - Charles-Antoine Couret <charles-antoine.couret@essensium.com>
+
+properties:
+  compatible:
+    enum:
+      - ti,dac7311
+      - ti,dac6311
+      - ti,dac5311
+
+  reg:
+    maxItems: 1
+
+  vref-supply:
+    description:
+      Reference voltage must be supplied to establish the scaling of the
+      output voltage.
+
+  spi-max-frequency: true
+
+required:
+  - compatible
+  - reg
+  - vref-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        dac@0 {
+            compatible = "ti,dac7311";
+            reg = <0>; /* CS0 */
+            spi-max-frequency = <1000000>;
+            vref-supply = <&vdd_supply>;
+        };
+    };
+...