[PATCH v2 1/2] dt-bindings: hwmon: Add TI INA4230 4-channel I2C power monitor

[Alexey Charkov <alchark@flipper.net>]

Add TI INA4230, which is a 48V 4-channel 16-bit I2C-based
current/voltage/power/energy monitor with alert function.

Link: https://www.ti.com/product/INA4230
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Alexey Charkov <alchark@flipper.net>
---
 .../devicetree/bindings/hwmon/ti,ina4230.yaml      | 130 +++++++++++++++++++++
 MAINTAINERS                                        |   6 +
 2 files changed, 136 insertions(+)

diff --git a/Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml b/Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml
new file mode 100644
index 000000000000..69839e7a3197
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml
@@ -0,0 +1,130 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/ti,ina4230.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments INA4230 quad-channel power monitors
+
+maintainers:
+  - Alexey Charkov <alchark@flipper.net>
+
+description: |
+  The INA4230 is a 48V quad-channel 16-bit current, voltage, power and energy
+  monitor with an I2C interface.
+
+  Datasheet:
+    https://www.ti.com/product/INA4230
+
+properties:
+  compatible:
+    enum:
+      - ti,ina4230
+
+  reg:
+    maxItems: 1
+
+  "#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
+
+  vs-supply:
+    description: phandle to the regulator that provides the VS supply typically
+      in range from 1.7 V to 5.5 V.
+
+  ti,alert-polarity-active-high:
+    description: Alert pin is asserted based on the value of Alert polarity Bit
+      of the CONFIG2 register. Default value is 0, for which the alert pin
+      toggles from high to low during faults. When this property is set, the
+      corresponding register bit is set to 1, and the alert pin toggles from
+      low to high during faults.
+    $ref: /schemas/types.yaml#/definitions/flag
+
+patternProperties:
+  "^input@[0-3]$":
+    description: The node contains optional child nodes for four 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, 2 or 3, corresponding to the IN1, IN2, IN3
+          or IN4 ports of the INA4230, respectively.
+        enum: [ 0, 1, 2, 3 ]
+
+      label:
+        description: name of the input source
+
+      shunt-resistor-micro-ohms:
+        description: shunt resistor value in micro-Ohm
+
+      ti,maximum-expected-current-microamp:
+        description: |
+          This value indicates the maximum current in microamps that you can
+          expect to measure with ina4230 in your circuit.
+
+          This value will be used to calculate the Current_LSB and current/power
+          coefficient for the pmbus and to calibrate the IC.
+        minimum: 32768
+        maximum: 4294967295
+        default: 32768000
+
+    required:
+      - reg
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: hwmon-common.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        power-sensor@44 {
+            compatible = "ti,ina4230";
+            reg = <0x44>;
+            vs-supply = <&vdd_3v0>;
+            ti,alert-polarity-active-high;
+            #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 = <50000>;
+                ti,maximum-expected-current-microamp = <300000>;
+            };
+
+            input@2 {
+                reg = <0x2>;
+                label = "VDD_5V";
+                shunt-resistor-micro-ohms = <10000>;
+                ti,maximum-expected-current-microamp = <5000000>;
+            };
+
+            input@3 {
+                reg = <0x3>;
+            };
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 4d879f6a7b51..bc6f1836bcb1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12511,6 +12511,12 @@ S:	Maintained
 F:	Documentation/hwmon/ina233.rst
 F:	drivers/hwmon/pmbus/ina233.c
 
+INA4230 HWMON DRIVER
+M:	Alexey Charkov <alchark@flipper.net>
+L:	linux-hwmon@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/hwmon/ti,ina4230.yaml
+
 INDEX OF FURTHER KERNEL DOCUMENTATION
 M:	Carlos Bilbao <carlos.bilbao@kernel.org>
 S:	Maintained

-- 
2.52.0