[PATCH 2/3] dt-bindings: iio: amplifiers: Add docs for HMC425A Step Attenuator

[Beniamin Bia]

From: Michael Hennerich <michael.hennerich@xxxxxxxxxx>

Document support for Analog Devices MC425A Step Attenuator.

Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
Signed-off-by: Beniamin Bia <beniamin.bia@xxxxxxxxxx>
---
 .../bindings/iio/amplifiers/adi,hmc425a.yaml  | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml

diff --git a/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml b/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml
new file mode 100644
index 000000000000..6f4a292395e4
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/amplifiers/adi,hmc425a.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HMC425A 6-bit Digital Step Attenuator
+
+maintainers:
+- Michael Hennerich <michael.hennerich@xxxxxxxxxx>
+
+description: |
+  Digital Step Attenuator IIO device with gpio interface.
+  HMC425A 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz
+  https://www.analog.com/media/en/technical-documentation/data-sheets/hmc425A.pdf
+
+properties:
+compatible:
+    enum:
+    - adi,hmc425a
+
+vcc-supply:
+    description:
+    digital voltage regulator (see regulator/regulator.txt)
+    maxItems: 1
+
+ctrl-gpios:
+    description:
+    Must contain an array of 6 GPIO specifiers, referring to the GPIO pins
+    connected to the control pins V1-V6.
+    maxItems: 6
+
+required:
+- compatible
+- ctrl-gpios
+
+examples:
+- |
+    #include <dt-bindings/gpio/gpio.h>
+
+    &gpio {
+    #address-cells = <1>;
+    #size-cells = <0>;
+      gpio_hmc425a: hmc425a {
+        compatible = "adi,hmc425a";
+        ctrl-gpios = <&gpio 40 GPIO_ACTIVE_HIGH>,
+          <&gpio 39 GPIO_ACTIVE_HIGH>,
+          <&gpio 38 GPIO_ACTIVE_HIGH>,
+          <&gpio 37 GPIO_ACTIVE_HIGH>,
+          <&gpio 36 GPIO_ACTIVE_HIGH>,
+          <&gpio 35 GPIO_ACTIVE_HIGH>;
+
+        vcc-supply = <&foo>;
+      };
+    }
-- 
2.17.1