dt-bindings: iio: dac: add support for mcp47a1

The Microchip MCP47A1 is a 6-bit volatile Digital-to-Analog converter
which communicates via I2C.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>

Documentation/devicetree/bindings/iio/dac/microchip,mcp47a1.yaml

@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+
+$id: http://devicetree.org/schemas/iio/dac/microchip,mcp47a1.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip MCP47A1 DAC
+
+maintainers:
+  - Joshua Crofts <joshua.crofts1@gmail.com>
+
+description: |
+  The Microchip MCP47A1 is a 6-bit single output volatile DAC.
+  This device can have different IDs (0x2e and 0x3e).
+  https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/25154A.pdf
+
+properties:
+  compatible:
+    const: microchip,mcp47a1
+
+  reg:
+    items:
+      - enum: [0x2e, 0x3e]
+
+  vref-supply: true
+
+  vdd-supply: true
+
+required:
+  - compatible
+  - reg
+  - vref-supply
+  - vdd-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          dac@2e {
+              compatible = "microchip,mcp47a1";
+              reg = <0x2e>;
+              vref-supply = <&vref_regulator>;
+              vdd-supply = <&vdd_regulator>;
+          };
+    };

MAINTAINERS

@@ -17707,6 +17707,11 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/iio/adc/microchip,mcp3911.yaml
 F:	drivers/iio/adc/mcp3911.c
 
+MICROCHIP MCP47A1 DAC DRIVER
+M:	Joshua Crofts <joshua.crofts1@gmail.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/iio/dac/microchip,mcp47a1.yaml
+
 MICROCHIP MCP9982 TEMPERATURE DRIVER
 M:	Victor Duicu <victor.duicu@microchip.com>
 L:	linux-hwmon@vger.kernel.org