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From:   Ciprian Regus <ciprian.regus@analog.com>
To:     <jic23@kernel.org>, <krzysztof.kozlowski+dt@linaro.org>,
        <robh+dt@kernel.org>, <linux-iio@vger.kernel.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
CC:     Ciprian Regus <ciprian.regus@analog.com>
Subject: [PATCH v3 1/2] dt-bindings: iio: dac: add adi,ad5754.yaml
Date:   Fri, 18 Nov 2022 19:24:06 +0200
Message-ID: <20221118172407.765423-2-ciprian.regus@analog.com>
In-Reply-To: <20221118172407.765423-1-ciprian.regus@analog.com>
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Add devicetree bindings documentation for the AD5754 DAC driver.

Signed-off-by: Ciprian Regus <ciprian.regus@analog.com>
---
 changes in v3:
  - added additionalProperties: false to patternProperties
  - dropped status in the example.
  - added different values for adi,output-range-microvolt in the example.
    Negative values cannot be set since that will create a dt_bindings_check error.
 .../bindings/iio/dac/adi,ad5754.yaml          | 181 ++++++++++++++++++
 1 file changed, 181 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ad5754.yaml

diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad5754.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad5754.yaml
new file mode 100644
index 000000000000..de0f6fab82b8
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/adi,ad5754.yaml
@@ -0,0 +1,181 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/adi,ad5754.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD5754 DAC
+
+maintainers:
+  - Ciprian Regus <ciprian.regus@analog.com>
+
+description: |
+  Bindings for the AD5754 and other chip variants digital-to-analog
+  converters.
+
+  https://www.analog.com/media/en/technical-documentation/data-sheets/AD5724_5734_5754.pdf
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ad5722_5732_5752.pdf
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ad5724r_5734r_5754r.pdf
+  https://www.analog.com/media/en/technical-documentation/data-sheets/AD5722R_5732R_5752R.pdf
+
+properties:
+  compatible:
+    enum:
+      - adi,ad5722
+      - adi,ad5732
+      - adi,ad5752
+      - adi,ad5724
+      - adi,ad5734
+      - adi,ad5754
+      - adi,ad5722r
+      - adi,ad5732r
+      - adi,ad5752r
+      - adi,ad5724r
+      - adi,ad5734r
+      - adi,ad5754r
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 30000000
+
+  spi-cpol: true
+
+  vref-supply:
+    description:
+      The regulator to use as an external reference. If this is not provided,
+      the internal reference will be used for chips that have this feature.
+      The external reference must be 2.5V.
+
+  clr-gpios:
+    description: DAC output clear GPIO (CLR pin). If specified, it will be set
+      to high during probe, thus allowing the DAC output to be updated.
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+patternProperties:
+  "^channel@([0-3])$":
+    type: object
+    additionalProperties: false
+    description: Configurations for the DAC channels
+
+    properties:
+      reg:
+        description: Channel number
+        maxItems: 1
+
+      adi,output-range-microvolt:
+        description: |
+          Voltage range of a channel as <minimum, maximum>.
+        oneOf:
+          - items:
+              - const: 0
+              - enum: [5000000, 10000000, 10800000]
+          - items:
+              - const: -5000000
+              - const: 5000000
+          - items:
+              - const: -10000000
+              - const: 10000000
+          - items:
+              - const: -10800000
+              - const: 10800000
+
+    required:
+      - reg
+      - adi,output-range-microvolt
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - adi,ad5722
+              - adi,ad5732
+              - adi,ad5752
+              - adi,ad5722r
+              - adi,ad5732r
+              - adi,ad5752r
+    then:
+      patternProperties:
+        "^channel@([0-3])$":
+          type: object
+          properties:
+            reg:
+              description: Channel number
+              enum: [0, 1]
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - adi,ad5724
+              - adi,ad5734
+              - adi,ad5754
+              - adi,ad5724r
+              - adi,ad5734r
+              - adi,ad5754r
+    then:
+      patternProperties:
+        "^channel@([0-3])$":
+          type: object
+          properties:
+            reg:
+              description: Channel number
+              enum: [0, 1, 2, 3]
+
+required:
+  - compatible
+  - reg
+  - spi-max-frequency
+  - spi-cpol
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        dac@0 {
+            compatible = "adi,ad5754r";
+            reg = <0>;
+            spi-max-frequency = <1000000>;
+            spi-cpol;
+
+            clr-gpios = <&gpio 25 GPIO_ACTIVE_LOW>;
+
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            channel@0 {
+                reg = <0>;
+                adi,output-range-microvolt = <0 5000000>;
+            };
+            channel@1 {
+                reg = <1>;
+                adi,output-range-microvolt = <0 10000000>;
+            };
+            channel@2 {
+                reg = <2>;
+                adi,output-range-microvolt = <0 5000000>;
+            };
+            channel@3 {
+                reg = <3>;
+                adi,output-range-microvolt = <0 10000000>;
+            };
+        };
+    };
-- 
2.30.2