[PATCH v2 1/2] dt-bindings: iio: addac: one-bit-adc-dac yaml documentation

[Cristian Pop <cristian.pop@analog.com>]

This adds device tree bindings for the one-bit-adc-dac.

Signed-off-by: Cristian Pop <cristian.pop@analog.com>
V1->V2                                                                     
 - I am aware of the recommendation of rename/move this driver. Should we  
   consider "drivers/io/gpio.c"?                                           
 - Add .yaml file                                                          
 - Remove blank lines, remove unnecessary coma                             
 - Remove macros for channels                                              
 - Check if channel is input for write_raw                                 
 - Use labels instead of extend_name                                       
 - Fix channel indexing                                                    
 - Use "sizeof(*channels)" in devm_kcalloc()                               
 - Remove assignment: " indio_dev->dev.parent = &pdev->dev;"               
 - Remove "platform_set_drvdata"                                           
 - Remove "adi" from compatible string since is not ADI specific driver.
---
 .../bindings/iio/addac/one-bit-adc-dac.yaml   | 89 +++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/addac/one-bit-adc-dac.yaml

diff --git a/Documentation/devicetree/bindings/iio/addac/one-bit-adc-dac.yaml b/Documentation/devicetree/bindings/iio/addac/one-bit-adc-dac.yaml
new file mode 100644
index 000000000000..dbed0f3b1ca4
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/addac/one-bit-adc-dac.yaml
@@ -0,0 +1,89 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2020 Analog Devices Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/addac/one-bit-adc-dac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices one bit ADC DAC driver
+
+maintainers:
+  - Cristian Pop <cristian.pop@analog.com>
+
+description: |
+  One bit ADC DAC driver
+
+properties:
+  compatible:
+    enum:
+      - adi,one-bit-adc-dac
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  in-gpios:
+    description: Input GPIOs
+
+  out-gpios:
+    description: Output GPIOs
+
+required:
+  - compatible
+  - in-gpios
+  - out-gpios
+
+patternProperties:
+  "^channel@([0-9]|1[0-5])$":
+    type: object
+    description: |
+      Represents the external channels which are connected to the ADDAC.
+
+    properties:
+      reg:
+        maxItems: 1
+        description: |
+          The channel number.
+
+      label:
+        description: |
+          Unique name to identify which channel this is.
+
+    required:
+      - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    one-bit-adc-dac@0 {
+        compatible = "one-bit-adc-dac";
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        in-gpios = <&gpio 17 0>, <&gpio 27 0>;
+        out-gpios = <&gpio 23 0>, <&gpio 24 0>;
+
+        channel@0 {
+          reg = <0>;
+          label = "i_17";
+        };
+
+        channel@1 {
+          reg = <1>;
+          label = "i_27";
+        };
+
+        channel@2 {
+          reg = <2>;
+          label = "o_23";
+        };
+
+        channel@3 {
+          reg = <3>;
+          label = "o_24";
+        };
+    };
-- 
2.17.1