dt-bindings: hwmon: ina3221: Convert to json-schema

Convert the TI INA3221 bindings from the free-form text format to
json-schema.

Note that the INA3221 input channels default to enabled in the chip.
Unless channels are explicitly disabled in device-tree, input
channels will be enabled.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Ninad Malwade <nmalwade@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230929103650.86074-2-jonathanh@nvidia.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/devicetree/bindings/hwmon/ina3221.txt

-Texas Instruments INA3221 Device Tree Bindings
-
-1) ina3221 node
-  Required properties:
-  - compatible: Must be "ti,ina3221"
-  - reg: I2C address
-
-  Optional properties:
-  - ti,single-shot: This chip has two power modes: single-shot (chip takes one
-                    measurement and then shuts itself down) and continuous (
-                    chip takes continuous measurements). The continuous mode is
-                    more reliable and suitable for hardware monitor type device,
-                    but the single-shot mode is more power-friendly and useful
-                    for battery-powered device which cares power consumptions
-                    while still needs some measurements occasionally.
-                    If this property is present, the single-shot mode will be
-                    used, instead of the default continuous one for monitoring.
-
-  = The node contains optional child nodes for three channels =
-  = Each child node describes the information of input source =
-
-  - #address-cells: Required only if a child node is present. Must be 1.
-  - #size-cells: Required only if a child node is present. Must be 0.
-
-2) child nodes
-  Required properties:
-  - reg: Must be 0, 1 or 2, corresponding to IN1, IN2 or IN3 port of INA3221
-
-  Optional properties:
-  - label: Name of the input source
-  - shunt-resistor-micro-ohms: Shunt resistor value in micro-Ohm
-
-Example:
-
-ina3221@40 {
-	compatible = "ti,ina3221";
-	reg = <0x40>;
-	#address-cells = <1>;
-	#size-cells = <0>;
-
-	input@0 {
-		reg = <0x0>;
-		status = "disabled";
-	};
-	input@1 {
-		reg = <0x1>;
-		shunt-resistor-micro-ohms = <5000>;
-	};
-	input@2 {
-		reg = <0x2>;
-		label = "VDD_5V";
-		shunt-resistor-micro-ohms = <5000>;
-	};
-};

Documentation/devicetree/bindings/hwmon/ti,ina3221.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/ti,ina3221.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments INA3221 Current and Voltage Monitor
+
+maintainers:
+  - Jean Delvare <jdelvare@suse.com>
+  - Guenter Roeck <linux@roeck-us.net>
+
+properties:
+  compatible:
+    const: ti,ina3221
+
+  reg:
+    maxItems: 1
+
+  ti,single-shot:
+    description: |
+      This chip has two power modes: single-shot (chip takes one measurement
+      and then shuts itself down) and continuous (chip takes continuous
+      measurements). The continuous mode is more reliable and suitable for
+      hardware monitor type device, but the single-shot mode is more power-
+      friendly and useful for battery-powered device which cares power
+      consumptions while still needs some measurements occasionally.
+
+      If this property is present, the single-shot mode will be used, instead
+      of the default continuous one for monitoring.
+    $ref: /schemas/types.yaml#/definitions/flag
+
+  "#address-cells":
+    description: Required only if a child node is present.
+    const: 1
+
+  "#size-cells":
+    description: Required only if a child node is present.
+    const: 0
+
+patternProperties:
+  "^input@[0-2]$":
+    description: The node contains optional child nodes for three channels.
+      Each child node describes the information of input source. Input channels
+      default to enabled in the chip. Unless channels are explicitly disabled
+      in device-tree, input channels will be enabled.
+    type: object
+    additionalProperties: false
+    properties:
+      reg:
+        description: Must be 0, 1 and 2, corresponding to the IN1, IN2 or IN3
+          ports of the INA3221, respectively.
+        enum: [ 0, 1, 2 ]
+
+      label:
+        description: name of the input source
+
+      shunt-resistor-micro-ohms:
+        description: shunt resistor value in micro-Ohm
+
+    required:
+      - reg
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        power-sensor@40 {
+            compatible = "ti,ina3221";
+            reg = <0x40>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            input@0 {
+                reg = <0x0>;
+                /*
+                 * Input channels are enabled by default in the device and so
+                 * to disable, must be explicitly disabled in device-tree.
+                 */
+                status = "disabled";
+            };
+
+            input@1 {
+                reg = <0x1>;
+                shunt-resistor-micro-ohms = <5000>;
+            };
+
+            input@2 {
+                reg = <0x2>;
+                label = "VDD_5V";
+                shunt-resistor-micro-ohms = <5000>;
+            };
+        };
+    };