[PATCH 3/3] dt-bindings: adc: ad7887: add binding doc for AD7887

Alexandru Ardelean
2020-11-17T07:48:13Z

This change adds a simple device-tree binding for thhe Analog Devices
AD7887 ADC.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
.../bindings/iio/adc/adi,ad7887.yaml | 70 +++++++++++++++++++
1 file changed, 70 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7887.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7887.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7887.yaml
new file mode 100644
index 000000000000..9b30f4569b4e
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7887.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad7887.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD7887 low power, 12-bit ADC
+
+maintainers:
+ - Michael Hennerich <michael.hennerich@analog.com>
+
+description: |
+ Analog Devices AD7887 low power, 12-bit analog-to-digital converter (ADC)
+ that operates from a single 2.7 V to 5.25 V power supply.
+
+properties:
+ compatible:
+ enum:
+ - adi,ad7887
+
+ reg:
+ maxItems: 1
+
+ spi-cpha: true
+
+ spi-cpol: true
+
+ avcc-supply: true
+
+ spi-max-frequency: true
+
+ vref-supply:
+ description:
+ ADC reference voltage supply
+
+ adi,dual-channel-mode:
+ description:
+ Configures dual-channel mode for the ADC. In dual-channel operation,
+ the AIN1/VREF pin assumes its AIN1 function, providing a second analog
+ input channel. In this case, he reference voltage for the part is provided
+ via the VDD pin. As a result, the input voltage range on both the AIN0 and
+ AIN1 inputs is 0 to VDD.
+ type: boolean
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - spi-cpha
+ - spi-cpol
+
+examples:
+ - |
+ spi0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ adc@0 {
+ compatible = "adi,ad7887";
+ reg = <0>;
+ spi-max-frequency = <1000000>;
+ spi-cpol;
+ spi-cpha;
+
+ avcc-supply = <&adc_supply>;
+ vref-supply = <&adc_vref>;
+ };
+ };
+...
--
2.17.1