| # 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: |
| maxItems: 1 |
| |
| 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: |
| 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: |
| 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: |
| 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; |
| }; |
| }; |
| ... |
