dt-bindings: hwmon: add renesas,isl28022

Add dt-bindings for Renesas ISL28022 power monitor.

Signed-off-by: Carsten Spieß <mail@carsten-spiess.de>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Yikai Tsai <yikai.tsai.wiwynn@gmail.com>
Message-ID: <20241002081133.13123-2-yikai.tsai.wiwynn@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml

@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/renesas,isl28022.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas ISL28022 power monitor
+
+maintainers:
+  - Carsten Spieß <mail@carsten-spiess.de>
+
+description: |
+  The ISL28022 is a power monitor with I2C interface. The device monitors
+  voltage, current via shunt resistor and calculated power.
+
+  Datasheets:
+    https://www.renesas.com/us/en/www/doc/datasheet/isl28022.pdf
+
+properties:
+  compatible:
+    const: renesas,isl28022
+
+  reg:
+    maxItems: 1
+
+  shunt-resistor-micro-ohms:
+    description:
+      Shunt resistor value in micro-Ohm
+    minimum: 800
+    default: 10000
+
+  renesas,shunt-range-microvolt:
+    description:
+      Maximal shunt voltage range of +/- 40 mV, 80 mV, 160 mV or 320 mV
+    default: 320000
+    enum: [40000, 80000, 160000, 320000]
+
+  renesas,average-samples:
+    description:
+      Number of samples to be used to report voltage, current and power values.
+    default: 1
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [1, 2, 4, 8, 16, 32, 64, 128]
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        power-monitor@40 {
+            compatible = "renesas,isl28022";
+            reg = <0x40>;
+            shunt-resistor-micro-ohms = <8000>;
+            renesas,shunt-range-microvolt = <40000>;
+            renesas,average-samples = <128>;
+        };
+    };

MAINTAINERS

@@ -12104,6 +12104,12 @@ F:	drivers/isdn/Makefile
 F:	drivers/isdn/hardware/
 F:	drivers/isdn/mISDN/
 
+ISL28022 HARDWARE MONITORING DRIVER
+M:	Carsten Spieß <mail@carsten-spiess.de>
+L:	linux-hwmon@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml
+
 ISOFS FILESYSTEM
 M:	Jan Kara <jack@suse.cz>
 L:	linux-fsdevel@vger.kernel.org