[PATCH] dt-bindings: iio: ad7949: switch binding to yaml

["João Victor Marques de Oliveira" <joao.marques.oliveira@usp.br>]

Changes switches from old text bindings, to YAML bindings, and also
include adi,reference-select property to specify the source for the
reference voltage signal.

Signed-off-by: João Victor Marques de Oliveira <joao.marques.oliveira@usp.br>
Signed-off-by: Thiago L. A. Miller <tmiller@mochsl.org.br>
Co-developed-by: Thiago L. A. Miller <tmiller@mochsl.org.br>
Signed-off-by: Osvaldo M. Yasuda <omyasuda@yahoo.com.br>
Co-developed-by: Osvaldo M. Yasuda <omyasuda@yahoo.com.br>
---
We're adding Charles-Antoine Couret as main dt maintainer since we have
just switched documentation to yaml format. 

 .../devicetree/bindings/iio/adc/ad7949.txt    | 16 -----
 .../devicetree/bindings/iio/adc/ad7949.yaml   | 71 +++++++++++++++++++
 2 files changed, 71 insertions(+), 16 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/iio/adc/ad7949.txt
 create mode 100644 Documentation/devicetree/bindings/iio/adc/ad7949.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/ad7949.txt b/Documentation/devicetree/bindings/iio/adc/ad7949.txt
deleted file mode 100644
index c7f5057356b1..000000000000
--- a/Documentation/devicetree/bindings/iio/adc/ad7949.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-* Analog Devices AD7949/AD7682/AD7689
-
-Required properties:
- - compatible: Should be one of
-	* "adi,ad7949"
-	* "adi,ad7682"
-	* "adi,ad7689"
- - reg: spi chip select number for the device
- - vref-supply: The regulator supply for ADC reference voltage
-
-Example:
-adc@0 {
-	compatible = "adi,ad7949";
-	reg = <0>;
-	vref-supply = <&vdd_supply>;
-};
diff --git a/Documentation/devicetree/bindings/iio/adc/ad7949.yaml b/Documentation/devicetree/bindings/iio/adc/ad7949.yaml
new file mode 100644
index 000000000000..111c9e26f8e7
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/ad7949.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/ad7949.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+
+title: Analog Devices AD7949/AD7682/AD7689
+
+maintainers:
+  - Charles-Antoine Couret <charles-antoine.couret@essensium.com>
+  - João Victor Marques de Oliveira <joao.marques.oliveira@usp.br>
+  - Thiago L. A. Miller <tmiller@mochsl.org.br>
+  - Osvaldo M. Yasuda <omyasuda@yahoo.com.br>
+
+properties:
+  compatible:
+    enum:
+      - adi,ad7949
+      - adi,ad7682
+      - adi,ad7689
+
+  reg:  
+    description:
+      spi chip select number for the device
+    maxItems: 1
+
+  vref-supply:
+    description:
+      The regulator supply for ADC reference voltage
+    maxItems: 1
+
+  adi,reference-select:
+    enum: [0, 1, 2, 3, 6, 7]
+    description:
+        Select the reference voltage source to use when converting the input voltages.
+            0 - Internal 2.5V reference; temperature sensor enabled
+            1 - Internal 4.096V reference; temperature sensor enabled
+            2 - External reference, temperature sensor enabled, no buffer
+            3 - External reference, temperature sensor enabled, buffer enabled
+            6 - External reference, temperature sensor disabled, no buffer
+            7 - External reference, temperature sensor disabled, buffer enabled
+    maxItems: 1
+
+required:
+  - compatible 
+  - reg
+  - vref-supply
+
+examples:
+  - |
+    spi0 {
+        #address-cells = <0x1>;
+        #size-cells = <0x0>;
+        adc@0 {
+            compatible = "adi,ad7949";
+            reg = <0>;
+            adi,reference-select = <0>;
+            vref-supply = <&vdd_supply>;
+        };
+    };
+  - |
+    spi0 {
+        #address-cells = <0x1>;
+        #size-cells = <0x0>;
+        adc@0 {
+            compatible = "adi,ad7949";
+            reg = <0>;
+            adi,reference-select = <0>;
+        };
+    };
-- 
2.21.0