Message-Id: <20230810093322.593259-1-mitrutzceclan@gmail.com>
Date:   Thu, 10 Aug 2023 12:33:16 +0300
From:   Dumitru Ceclan <mitrutzceclan@...il.com>
To:     mitrutzceclan@...il.com
Cc:     Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Cosmin Tanislav <demonsingur@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        ChiaEn Wu <chiaen_wu@...htek.com>,
        ChiYuan Huang <cy_huang@...htek.com>,
        Hugo Villeneuve <hvilleneuve@...onoff.com>,
        Haibo Chen <haibo.chen@....com>,
        Ibrahim Tilki <Ibrahim.Tilki@...log.com>,
        Ramona Bolboaca <ramona.bolboaca@...log.com>,
        William Breathitt Gray <william.gray@...aro.org>,
        Leonard Göhrs <l.goehrs@...gutronix.de>,
        Ceclan Dumitru <dumitru.ceclan@...log.com>,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] dt-bindings: adc: add AD717X

The AD717x family offer a complete integrated Sigma-Delta ADC solution
which can be used in high precision, low noise single channel
applications or higher speed multiplexed applications. The Sigma-Delta
ADC is intended primarily for measurement of signals close to DC but also
delivers outstanding performance with input bandwidths out to ~10kHz.

Signed-off-by: Dumitru Ceclan <mitrutzceclan@...il.com>
---
 .../bindings/iio/adc/adi,ad717x.yaml          | 158 ++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad717x.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad717x.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad717x.yaml
new file mode 100644
index 000000000000..f12926e69958
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad717x.yaml
@@ -0,0 +1,158 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2023 Analog Devices Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad717x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD717X ADC family SPI driver
+
+maintainers:
+  - Ceclan Dumitru <dumitru.ceclan@...log.com>
+
+description: |
+  Bindings for the Analog Devices AD717X ADC's. Datasheets for supported chips:
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-2.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD7173-8.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD7175-2.pdf
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD7176-2.pdf
+
+properties:
+  compatible:
+    enum:
+      - adi,ad7172-2
+      - adi,ad7173-8
+      - adi,ad7175-2
+      - adi,ad7176-2
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  spi-max-frequency:
+    maximum: 20000000
+
+  spi-cpol:
+    type: boolean
+
+  spi-cpha:
+    type: boolean
+
+  adi,temp-channel:
+    description:
+      Enables temperature reading channel
+    type: boolean
+
+  dependencies:
+    adi,temp-channel:
+      compatible:
+        enum:
+          - adi,ad7172-2
+          - adi,ad7173-8
+          - adi,ad7175-2
+
+
+  required:
+    - compatible
+    - reg
+    - interrupts
+    - spi-cpol
+    - spi-cpha
+
+patternProperties:
+  "^channel@([0-9a-f])$":
+    type: object
+    $ref: adc.yaml
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        description: Channel number
+        minimum: 0
+        maximum: 15
+
+      diff-channels:
+        description:
+          Analog input pins
+        items:
+          minimum: 0
+          maximum: 31
+      
+      adi,bipolar:
+        description: Specify if the channel should measure in bipolar mode.
+        type: boolean
+
+    required:
+      - reg
+      - diff-channels
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    spi {
+      status = "okay";
+
+      ad7173@0 {
+        compatible = "adi,ad7173-8";
+        reg = <0>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
+        interrupt-parent = <&gpio>;
+        spi-max-frequency = <5000000>;
+        spi-cpol;
+        spi-cpha;
+
+        adi,temp-channel;
+
+        channel@0 {
+          reg = <0>;
+          adi,bipolar;
+
+          diff-channels = <0 1>;
+        };
+
+        channel@1 {
+          reg = <1>;
+
+          diff-channels = <2 3>;
+        };
+
+        channel@2 {
+          reg = <2>;
+          adi,bipolar;
+
+          diff-channels = <4 5>;
+        };
+
+        channel@3 {
+          reg = <3>;
+          adi,bipolar;
+
+          diff-channels = <6 7>;
+        };
+
+        channel@4 {
+          reg = <4>;
+
+          diff-channels = <8 9>;
+        };
+      };
+    };
-- 
2.30.2

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