[PATCH 1/2] dt-bindings: iio: adc: Add binding for AD7380 ADCs

[David Lechner <dlechner@baylibre.com>]

This adds a binding specification for the Analog Devices Inc. AD7380
family of ADCs.

Signed-off-by: David Lechner <dlechner@baylibre.com>
---
 .../devicetree/bindings/iio/adc/adi,ad7380.yaml    | 102 +++++++++++++++++++++
 MAINTAINERS                                        |   9 ++
 2 files changed, 111 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml
new file mode 100644
index 000000000000..e9a0b72cd9d3
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml
@@ -0,0 +1,102 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad7380.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices Simultaneous Sampling Analog to Digital Converters
+
+maintainers:
+  - Michael Hennerich <Michael.Hennerich@analog.com>
+  - Nuno Sá <nuno.sa@analog.com>
+
+description: |
+  * https://www.analog.com/en/products/ad7380.html
+  * https://www.analog.com/en/products/ad7381.html
+  * https://www.analog.com/en/products/ad7383.html
+  * https://www.analog.com/en/products/ad7384.html
+
+$ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    enum:
+      - adi,ad7380
+      - adi,ad7381
+      - adi,ad7383
+      - adi,ad7384
+
+  reg: true
+
+  spi-max-frequency:
+    maximum: 80000000
+  spi-cpol: true
+  spi-cpha: true
+
+  adi,sdo-mode:
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [ 1-wire, 2-wire ]
+    description:
+      In 1-wire mode, the SDOA pin acts as the sole data line and the SDOB/ALERT
+      pin acts as the ALERT interrupt signal. In 2-wire mode, data for input A
+      is read from SDOA and data for input B is read from SDOB/ALERT (and the
+      ALERT interrupt signal is not available).
+
+  vcc-supply:
+    description: A 3V to 3.6V supply that powers the chip.
+
+  vlogic-supply:
+    description:
+      A 1.65V to 3.6V supply for the logic pins.
+
+  refio-supply:
+    description:
+      A 2.5V to 3.3V supply for the external reference voltage. When omitted,
+      the internal 2.5V reference is used.
+
+  interrupts:
+    description:
+      When the device is using 1-wire mode, this property is used to optionally
+      specify the ALERT interrupt.
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - adi,sdo-mode
+  - vcc-supply
+  - vlogic-supply
+
+allOf:
+  - if:
+      properties:
+        adi,sdo-mode:
+          const: 2-wire
+    then:
+      properties:
+        interrupts: false
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@0 {
+            compatible = "adi,ad7380";
+            reg = <0>;
+
+            spi-cpol;
+            spi-cpha;
+            spi-max-frequency = <80000000>;
+
+            adi,sdo-mode = "1-wire";
+            interrupts = <27>;
+
+            vcc-supply = <&supply_3_3V>;
+            vlogic-supply = <&supply_3_3V>;
+            refio-supply = <&supply_2_5V>;
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index fe1f6f97f96a..e2a998be5879 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -430,6 +430,15 @@ W:	http://wiki.analog.com/AD7142
 W:	https://ez.analog.com/linux-software-drivers
 F:	drivers/input/misc/ad714x.c
 
+AD738X ADC DRIVER (AD7380/1/2/4)
+M:	Michael Hennerich <michael.hennerich@analog.com>
+M:	Nuno Sá <nuno.sa@analog.com>
+R:	David Lechner <dlechner@baylibre.com>
+S:	Supported
+W:	https://wiki.analog.com/resources/tools-software/linux-drivers/iio-adc/ad738x
+W:	https://ez.analog.com/linux-software-drivers
+F:	Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml
+
 AD7877 TOUCHSCREEN DRIVER
 M:	Michael Hennerich <michael.hennerich@analog.com>
 S:	Supported

-- 
2.43.0