[PATCH 3/4] dt-bindings: iio: dac: add mcp4822

[Nicolas Frattaroli <frattaroli.nicolas@gmail.com>]

The MCP4801, MCP4802, MCP4811, MCP4812, MCP4821, and MCP4822 are
SPI digital-to-analog converters by Microchip, which have an
internal voltage reference, in contrast to the MCP49xx series
of DACs which use an external voltage reference.

Thus, these need a separate binding, as to not overcomplicate
the mcp4922 binding.

Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
---
 .../bindings/iio/dac/microchip,mcp4822.yaml   | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/dac/microchip,mcp4822.yaml

diff --git a/Documentation/devicetree/bindings/iio/dac/microchip,mcp4822.yaml b/Documentation/devicetree/bindings/iio/dac/microchip,mcp4822.yaml
new file mode 100644
index 000000000000..c6eaf0079add
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/microchip,mcp4822.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/microchip,mcp4822.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip MCP4801, MCP4802, MCP4811, MCP4812, MCP4821 and MCP4822 SPI DACs
+
+maintainers:
+  - Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
+
+properties:
+  compatible:
+    enum:
+      - microchip,mcp4801
+      - microchip,mcp4802
+      - microchip,mcp4811
+      - microchip,mcp4812
+      - microchip,mcp4821
+      - microchip,mcp4822
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        dac@0 {
+            compatible = "microchip,mcp4821";
+            reg = <0>;
+            vdd-supply = <&dac_reg>;
+        };
+    };
+...
-- 
2.40.0