[PATCH 1/2] dt-bindings: iio: adc: add binding for pac1921

[Matteo Martelli <matteomartelli3@gmail.com>]

Add binging for Microchip PAC1921 Power/Current monitor

Signed-off-by: Matteo Martelli <matteomartelli3@gmail.com>
---
 .../bindings/iio/adc/microchip,pac1921.yaml        | 79 ++++++++++++++++++++++
 1 file changed, 79 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/microchip,pac1921.yaml b/Documentation/devicetree/bindings/iio/adc/microchip,pac1921.yaml
new file mode 100644
index 000000000000..ec08228dcc16
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/microchip,pac1921.yaml
@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/microchip,pac1921.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip PAC1921 High-Side Power/Current Monitor with Anaog Output
+
+maintainers:
+  - Matteo Martelli <matteomartelli3@gmail.com>
+
+description: |
+  The PAC1921 is a power/current monitoring device with an analog output
+  and I2C/SMBus interface.
+
+  Datasheet can be found here:
+  https://ww1.microchip.com/downloads/en/DeviceDoc/PAC1921-Data-Sheet-DS20005293E.pdf
+
+properties:
+  compatible:
+    const: microchip,pac1921
+
+  reg:
+    maxItems: 1
+
+  "#io-channel-cells":
+    const: 1
+
+  shunt-resistor-micro-ohms:
+    description:
+      Value in micro Ohms of the shunt resistor connected between
+      the SENSE+ and SENSE- inputs, across which the current is measured.
+      Value is needed to compute the scaling of the measured current.
+
+  label:
+    description: Unique name to identify which device this is.
+
+  microchip,dv-gain:
+    description:
+      Digital multiplier to control the effective bus voltage gain. The gain
+      value of 1 is the setting for the full-scale range and it can be increased
+      when the system is designed for a lower VBUS range.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [1, 2, 4, 8, 16, 32]
+    default: 1
+
+  microchip,di-gain:
+    description:
+      Digital multiplier to control the effective current gain. The gain
+      value of 1 is the setting for the full-scale range and it can be
+      increased when the system is designed for a lower VSENSE range.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [1, 2, 4, 8, 16, 32, 64, 128]
+    default: 1
+
+required:
+  - compatible
+  - reg
+  - shunt-resistor-micro-ohms
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@4c {
+            compatible = "microchip,pac1921";
+            #io-channel-cells = <1>;
+            label = "vbat";
+            reg = <0x4c>;
+            shunt-resistor-micro-ohms = <10000>;
+            microchip,dv-gain = <4>;
+            microchip,di-gain = <32>;
+        };
+    };
+...

-- 
2.45.1