diff options
Diffstat (limited to 'Documentation/devicetree/bindings/iio/addac/adi,ad74115.yaml')
| -rw-r--r-- | Documentation/devicetree/bindings/iio/addac/adi,ad74115.yaml | 373 |
1 files changed, 373 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iio/addac/adi,ad74115.yaml b/Documentation/devicetree/bindings/iio/addac/adi,ad74115.yaml new file mode 100644 index 000000000000..72d2e910f206 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/addac/adi,ad74115.yaml @@ -0,0 +1,373 @@ +# 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; + }; + }; +... |