linux-kernel - [PATCH v2 2/3] dt-bindings: iio: amplifiers: Add docs for HMC425A Step Attenuator

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Message-ID: <20200122121702.30494-2-beniamin.bia@analog.com>
Date:   Wed, 22 Jan 2020 14:17:01 +0200
From:   Beniamin Bia <beniamin.bia@...log.com>
To:     <jic23@...nel.org>
CC:     <lars@...afoo.de>, <Michael.Hennerich@...log.com>,
        <pmeerw@...erw.net>, <linux-iio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <biabeniamin@...look.com>,
        <knaack.h@....de>, <robh+dt@...nel.org>, <mark.rutland@....com>,
        <devicetree@...r.kernel.org>,
        Michael Hennerich <michael.hennerich@...log.com>,
        Beniamin Bia <beniamin.bia@...log.com>
Subject: [PATCH v2 2/3] dt-bindings: iio: amplifiers: Add docs for HMC425A Step Attenuator

From: Michael Hennerich <michael.hennerich@...log.com>

Document support for Analog Devices MC425A Step Attenuator.

Signed-off-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Beniamin Bia <beniamin.bia@...log.com>
---
 .../bindings/iio/amplifiers/adi,hmc425a.yaml  | 56 +++++++++++++++++++
 1 file changed, 56 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..a0afa661f4ac
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml
@@ -0,0 +1,56 @@
+# 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@...log.com>
+- Beniamin Bia <beniamin.bia@...log.com>
+
+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