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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/addac/adi,ad74115.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD74115H device
+
+maintainers:
+ - Cosmin Tanislav <cosmin.tanislav@analog.com>
+
+description: |
+ The AD74115H is a single-channel software configurable input/output
+ device for industrial control applications. It contains functionality for
+ analog output, analog input, digital output, digital input, resistance
+ temperature detector, and thermocouple measurements integrated into a single
+ chip solution with an SPI interface. The device features a 16-bit ADC and a
+ 14-bit DAC.
+
+ https://www.analog.com/en/products/ad74115h.html
+
+properties:
+ compatible:
+ enum:
+ - adi,ad74115h
+
+ reg:
+ maxItems: 1
+
+ spi-max-frequency:
+ maximum: 24000000
+
+ spi-cpol: true
+
+ reset-gpios: true
+
+ interrupts:
+ minItems: 1
+ maxItems: 2
+
+ interrupt-names:
+ minItems: 1
+ maxItems: 2
+ items:
+ enum:
+ - adc_rdy
+ - alert
+
+ avdd-supply: true
+ avcc-supply: true
+ dvcc-supply: true
+ dovdd-supply: true
+ refin-supply: true
+
+ adi,ch-func:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Channel function.
+ 0 - High impedance
+ 1 - Voltage output
+ 2 - Current output
+ 3 - Voltage input
+ 4 - Current input, externally-powered
+ 5 - Current input, loop-powered
+ 6 - Resistance input
+ 7 - RTD measure
+ 8 - Digital input logic
+ 9 - Digital input, loop-powered
+ 10 - Current output with HART
+ 11 - Current input, externally-powered, with HART
+ 12 - Current input, loop-powered, with HART
+ minimum: 0
+ maximum: 12
+ default: 0
+
+ adi,conv2-mux:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Input node for ADC conversion 2.
+ 0 - SENSE_EXT1 to AGND_SENSE
+ 1 - SENSE_EXT2 to AGND_SENSE
+ 2 - SENSE_EXT2 to SENSE_EXT1
+ 3 - AGND to AGND
+ minimum: 0
+ maximum: 3
+ default: 0
+
+ adi,conv2-range-microvolt:
+ description: Conversion range for ADC conversion 2.
+ oneOf:
+ - items:
+ - enum: [-2500000, 0]
+ - const: 2500000
+ - items:
+ - enum: [-12000000, 0]
+ - const: 12000000
+ - items:
+ - const: -2500000
+ - const: 0
+ - items:
+ - const: -104000
+ - const: 104000
+ - items:
+ - const: 0
+ - const: 625000
+
+ adi,sense-agnd-buffer-low-power:
+ type: boolean
+ description:
+ Whether to enable low-power buffered mode for the AGND sense pin.
+
+ adi,lf-buffer-low-power:
+ type: boolean
+ description:
+ Whether to enable low-power buffered mode for the low-side filtered
+ sense pin.
+
+ adi,hf-buffer-low-power:
+ type: boolean
+ description:
+ Whether to enable low-power buffered mode for the high-side filtered
+ sense pin.
+
+ adi,ext2-buffer-low-power:
+ type: boolean
+ description: Whether to enable low-power buffered mode for the EXT2 pin.
+
+ adi,ext1-buffer-low-power:
+ type: boolean
+ description: Whether to enable low-power buffered mode for the EXT1 pin.
+
+ adi,comparator-invert:
+ type: boolean
+ description: Whether to invert the comparator output.
+
+ adi,digital-input-sink-range-high:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ When not present, the digital input range is from 0 to 3700uA in steps
+ of 120uA, with a ~2k series resistance.
+ When present, the digital input range is from 0 to 7400uA in steps
+ of 240uA, with a ~1k series resistance.
+
+ adi,digital-input-sink-microamp:
+ description: Sink current in digital input mode.
+ minimum: 0
+ maximum: 3700
+ default: 0
+
+ adi,digital-input-debounce-mode-counter-reset:
+ type: boolean
+ description: |
+ When not present, a counter increments when the signal is asserted
+ and decrements when the signal is de-asserted.
+ When present, a counter increments while the signal is asserted and
+ resets when the signal de-asserts
+
+ adi,digital-input-unbuffered:
+ type: boolean
+ description: Whether to buffer digital input signals.
+
+ adi,digital-input-short-circuit-detection:
+ type: boolean
+ description: Whether to detect digital input short circuits.
+
+ adi,digital-input-open-circuit-detection:
+ type: boolean
+ description: Whether to detect digital input open circuits.
+
+ adi,digital-input-threshold-mode-fixed:
+ type: boolean
+ description: |
+ When not present, the digital input threshold range is -0.96 * AVDD
+ to AVDD.
+ When present, the threshold range is fixed from -19V to 30V.
+
+ adi,dac-bipolar:
+ type: boolean
+ description: |
+ When not present, the DAC operates in the 0V to 12V range.
+ When present, the DAC operates in the -12V to 12V range.
+
+ adi,charge-pump:
+ type: boolean
+ description: Whether to enable the internal charge pump.
+
+ adi,dac-hart-slew:
+ type: boolean
+ description: Whether to use a HART-compatible slew rate.
+
+ adi,dac-current-limit-low:
+ type: boolean
+ description: |
+ When not present, the DAC short-circuit current limit is 32mA in
+ either source or sink for VOUT and 4mA sink for IOUT.
+ When present, the limit is 16mA in either source or sink for VOUT,
+ 1mA sink for IOUT.
+
+ adi,4-wire-rtd:
+ type: boolean
+ description: |
+ When not present, the ADC should be used for measuring 3-wire RTDs.
+ When present, the ADC should be used for measuring 4-wire RTDs.
+
+ adi,3-wire-rtd-excitation-swap:
+ type: boolean
+ description: Whether to swap the excitation for 3-wire RTD.
+
+ adi,rtd-excitation-current-microamp:
+ description: Excitation current to apply to RTD.
+ enum: [250, 500, 750, 1000]
+ default: 250
+
+ adi,ext1-burnout:
+ type: boolean
+ description: Whether to enable burnout current for EXT1.
+
+ adi,ext1-burnout-current-nanoamp:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Burnout current in nanoamps to be applied to EXT1.
+ enum: [0, 50, 500, 1000, 10000]
+ default: 0
+
+ adi,ext1-burnout-current-polarity-sourcing:
+ type: boolean
+ description: |
+ When not present, the burnout current polarity for EXT1 is sinking.
+ When present, the burnout current polarity for EXT1 is sourcing.
+
+ adi,ext2-burnout:
+ type: boolean
+ description: Whether to enable burnout current for EXT2.
+
+ adi,ext2-burnout-current-nanoamp:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Burnout current in nanoamps to be applied to EXT2.
+ enum: [0, 50, 500, 1000, 10000]
+ default: 0
+
+ adi,ext2-burnout-current-polarity-sourcing:
+ type: boolean
+ description: |
+ When not present, the burnout current polarity for EXT2 is sinking.
+ When present, the burnout current polarity for EXT2 is sourcing.
+
+ adi,viout-burnout:
+ type: boolean
+ description: Whether to enable burnout current for VIOUT.
+
+ adi,viout-burnout-current-nanoamp:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Burnout current in nanoamps to be applied to VIOUT.
+ enum: [0, 1000, 10000]
+ default: 0
+
+ adi,viout-burnout-current-polarity-sourcing:
+ type: boolean
+ description: |
+ When not present, the burnout current polarity for VIOUT is sinking.
+ When present, the burnout current polarity for VIOUT is sourcing.
+
+ adi,gpio0-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ GPIO functions.
+ 0 - Disabled
+ 1 - Logic I/O
+ 2 - Comparator output
+ 3 - Control HART CD
+ 4 - Monitor HART CD
+ 5 - Monitor HART EOM status
+ minimum: 0
+ maximum: 5
+ default: 0
+
+ adi,gpio1-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ GPIO functions.
+ 0 - Disabled
+ 1 - Logic I/O
+ 2 - Drive external digital output FET
+ 3 - Control HART RXD
+ 4 - Monitor HART RXD
+ 5 - Monitor HART SOM status
+ minimum: 0
+ maximum: 5
+ default: 0
+
+ adi,gpio2-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ GPIO functions.
+ 0 - Disabled
+ 1 - Logic I/O
+ 2 - Drive internal digital output FET
+ 3 - Control HART TXD
+ 4 - Monitor HART TXD
+ 5 - Monitor HART TX complete status
+ minimum: 0
+ maximum: 5
+ default: 0
+
+ adi,gpio3-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ GPIO functions.
+ 0 - Disabled
+ 1 - Logic I/O
+ 2 - High impedance
+ 3 - Control HART RTS
+ 4 - Monitor HART RTS
+ 5 - Monitor HART CD complete status
+ minimum: 0
+ maximum: 5
+ default: 0
+
+required:
+ - compatible
+ - reg
+ - spi-cpol
+ - avdd-supply
+
+allOf:
+ - $ref: /schemas/spi/spi-peripheral-props.yaml#
+ - if:
+ required:
+ - adi,digital-input-sink-range-high
+ then:
+ properties:
+ adi,digital-input-sink-microamp:
+ maximum: 7400
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ addac@0 {
+ compatible = "adi,ad74115h";
+ reg = <0>;
+
+ spi-max-frequency = <12000000>;
+ spi-cpol;
+
+ reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
+
+ interrupt-parent = <&gpio>;
+ interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
+ interrupt-names = "adc_rdy";
+
+ avdd-supply = <&ad74115_avdd>;
+
+ adi,ch-func = <1>;
+ adi,conv2-mux = <2>;
+ adi,conv2-range-microvolt = <(-12000000) 12000000>;
+
+ adi,gpio0-mode = <1>;
+ adi,gpio1-mode = <1>;
+ adi,gpio2-mode = <1>;
+ adi,gpio3-mode = <1>;
+
+ adi,dac-bipolar;
+ };
+ };
+...