[PATCH] dt-bindings: iio: dac: Maxim max5522 DAC

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From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

Add binding Doc for this SPI DAC.

The driver was perviously posted but was missing the DT binding document.
https://lore.kernel.org/all/20221106165928.223318-1-angelo.dureghello@xxxxxxxxxxx/

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Cc: Angelo Dureghello <angelo.dureghello@xxxxxxxxxxx>

---

As it has been a few months and I don't want to end up not taking the driver
simply because it lacked this simple binding doc, I've written one.

 .../bindings/iio/dac/maxim,max5522.yaml       | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/dac/maxim,max5522.yaml b/Documentation/devicetree/bindings/iio/dac/maxim,max5522.yaml
new file mode 100644
index 000000000000..24830f56c501
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/maxim,max5522.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/maxim,max5522.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim Integrated MAX5522 Dual 10-bit Voltage-Output SPI DACs
+
+maintainers:
+  - Angelo Dureghello <angelo.dureghello@xxxxxxxxxxx>
+  - Jonathan Cameron <jic23@xxxxxxxxxx>
+
+description: |
+  Datasheet available at:
+  https://www.analog.com/en/products/max5522.html
+
+properties:
+  compatible:
+    const: maxim,max5522
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+  vrefin-supply: true
+
+required:
+  - compatible
+  - reg
+  - vrefin-supply
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        dac@0 {
+            compatible = "maxim,max5522";
+            reg = <0>;
+            vrefin-supply = <&vref>;
+        };
+    };
+...
-- 
2.39.0




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