[PATCH v3 1/2] dt-bindings: adc: add AD7173

Dumitru Ceclan
2023-10-05T11:00:52Z

The AD7173 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@gmail.com>
---
V2 -> V3
- remove redundant descriptions
- use referenced 'bipolar' property
- remove newlines from example

.../bindings/iio/adc/adi,ad7173.yaml | 130 ++++++++++++++++++
1 file changed, 130 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml
new file mode 100644
index 000000000000..bf9e3cbf842e
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml
@@ -0,0 +1,130 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2023 Analog Devices Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad7173.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD7173 ADC device driver
+
+maintainers:
+ - Ceclan Dumitru <dumitru.ceclan@analog.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
+
+ required:
+ - compatible
+ - reg
+ - interrupts
+
+patternProperties:
+ "^channel@[0-9a-f]$":
+ type: object
+ $ref: adc.yaml
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ minimum: 0
+ maximum: 15
+
+ diff-channels:
+ items:
+ minimum: 0
+ maximum: 31
+
+ bipolar:
+ 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 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ adc@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>;
+
+ channel@0 {
+ reg = <0>;
+ bipolar;
+ diff-channels = <0 1>;
+ };
+
+ channel@1 {
+ reg = <1>;
+ diff-channels = <2 3>;
+ };
+
+ channel@2 {
+ reg = <2>;
+ bipolar;
+ diff-channels = <4 5>;
+ };
+
+ channel@3 {
+ reg = <3>;
+ bipolar;
+ diff-channels = <6 7>;
+ };
+
+ channel@4 {
+ reg = <4>;
+ diff-channels = <8 9>;
+ };
+ };
+ };
--
2.39.2