dt-bindings: hwmon: convert TI ADS7828 bindings to dt-schema

Convert the TI ADS7828 bindings to dt-schema.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201117220807.208747-3-krzk@kernel.orgSigned-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/devicetree/bindings/hwmon/ads7828.txt

-ads7828 properties
-
-Required properties:
-- compatible: Should be one of
-	       ti,ads7828
-	       ti,ads7830
-- reg: I2C address
-
-Optional properties:
-
-- ti,differential-input
-  Set to use the device in differential mode.
-- vref-supply
-  The external reference on the device is set to this regulators output. If it
-  does not exists the internal reference will be used and output by the ads78xx
-  on the "external vref" pin.
-
-  Example ADS7828 node:
-
-  ads7828: ads@48 {
-	   comatible = "ti,ads7828";
-	   reg = <0x48>;
-	   vref-supply = <&vref>;
-	   ti,differential-input;
-  };

Documentation/devicetree/bindings/hwmon/ti,ads7828.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+
+$id: http://devicetree.org/schemas/hwmon/ti,ads7828.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments ADS7828/ADS7830 Analog to Digital Converter (ADC)
+
+maintainers:
+  - Krzysztof Kozlowski <krzk@kernel.org>
+
+description: |
+  The ADS7828 is 12-Bit, 8-Channel Sampling Analog to Digital Converter (ADC)
+  with an I2C interface.
+
+  Datasheets:
+    https://www.ti.com/product/ADS7828
+
+properties:
+  compatible:
+    enum:
+      - ti,ads7828
+      - ti,ads7830
+
+  reg:
+    maxItems: 1
+
+  ti,differential-input:
+    description:
+      Set to use the device in differential mode.
+    type: boolean
+
+  vref-supply:
+    description:
+      The regulator to use as an external reference. If it does not exists the
+      internal reference will be used.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@48 {
+            comatible = "ti,ads7828";
+            reg = <0x48>;
+            vref-supply = <&vref>;
+            ti,differential-input;
+        };
+    };

Documentation/devicetree/bindings/trivial-devices.yaml

@@ -350,10 +350,6 @@ properties:
           - st,24c256
             # Ambient Light Sensor with SMBUS/Two Wire Serial Interface
           - taos,tsl2550
-            # 8-Channels, 12-bit ADC
-          - ti,ads7828
-            # 8-Channels, 8-bit ADC
-          - ti,ads7830
             # Temperature Monitoring and Fan Control
           - ti,amc6821
             # Temperature sensor with 2-wire interface