[PATCH v3 1/2] dt-bindings: iio: adc: add maxim,max40080

[Stefan Popa <stefan.popa@analog.com>]

Add device tree bindings for the Maxim MAX40080 bidirectional
current-sense amplifier with a 12-bit ADC and an I2C/SMBus interface.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
---
 .../bindings/iio/adc/maxim,max40080.yaml      | 64 +++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/maxim,max40080.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/maxim,max40080.yaml b/Documentation/devicetree/bindings/iio/adc/maxim,max40080.yaml
new file mode 100644
index 0000000000000..3b367071b5d3f
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/maxim,max40080.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/maxim,max40080.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX40080 bidirectional current-sense amplifier
+
+maintainers:
+  - Ciprian Hegbeli <ciprian.hegbeli@analog.com>
+  - Stefan Popa <stefan.popa@analog.com>
+
+description: |
+  The MAX40080 is a high-precision, bidirectional current-sense amplifier with
+  an integrated 12-bit ADC and an I2C/SMBus interface. It measures the voltage
+  across an external shunt resistor and the input bus voltage, and stores the
+  results in an internal FIFO.
+
+  Datasheet:
+    https://www.analog.com/media/en/technical-documentation/data-sheets/MAX40080.pdf
+
+properties:
+  compatible:
+    const: maxim,max40080
+
+  reg:
+    maxItems: 1
+
+  vdd-supply:
+    description: Power supply for the device.
+
+  interrupts:
+    maxItems: 1
+    description: ALERT output for overcurrent/undervoltage threshold events.
+
+  "#io-channel-cells":
+    const: 1
+
+  shunt-resistor-micro-ohms:
+    description:
+      Value of the current-sense shunt resistor connected between the IN+ and
+      IN- inputs. Used to scale the reported current.
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@20 {
+            compatible = "maxim,max40080";
+            reg = <0x20>;
+            vdd-supply = <&vdd_3v3>;
+            #io-channel-cells = <1>;
+            shunt-resistor-micro-ohms = <100000>;
+        };
+    };
-- 
2.53.0