adaq4370-4 (2MSPS) and adaq4380-4 (4MSPS) are quad-channel precision data acquisition signal chain μModule solutions compatible with the ad738x family, with the following differences: - configurable gain in front of each 4 adc - internal reference is 3V derived from refin-supply (5V) - additional supplies To configure the gain a new patternProperties is added to describe each channel. It is restricted to adaq devices. Signed-off-by: Julien Stephan <jstephan@xxxxxxxxxxxx> --- .../devicetree/bindings/iio/adc/adi,ad7380.yaml | 117 +++++++++++++++++++++ 1 file changed, 117 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml index 74d82721637c..3007d8e39684 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml @@ -25,6 +25,8 @@ description: | * https://www.analog.com/en/products/ad7386-4.html * https://www.analog.com/en/products/ad7387-4.html * https://www.analog.com/en/products/ad7388-4.html + * https://www.analog.com/en/products/adaq4370-4.html + * https://www.analog.com/en/products/adaq4380-4.html $ref: /schemas/spi/spi-peripheral-props.yaml# @@ -46,6 +48,8 @@ properties: - adi,ad7386-4 - adi,ad7387-4 - adi,ad7388-4 + - adi,adaq4370-4 + - adi,adaq4380-4 reg: maxItems: 1 @@ -59,6 +63,9 @@ properties: vlogic-supply: true refio-supply: true refin-supply: true + vs-p-supply: true + vs-n-supply: true + ldo-supply: true aina-supply: description: @@ -86,12 +93,43 @@ properties: specify the ALERT interrupt. maxItems: 1 + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + required: - compatible - reg - vcc-supply - vlogic-supply +patternProperties: + "^channel@([0-3])$": + $ref: adc.yaml + type: object + + properties: + reg: + description: + The channel number. From 0 to 3 corresponding to channels A,B,C,D + items: + minimum: 0 + maximum: 3 + + adi,gain-milli: + description: + The hardware gain applied to the ADC input (in milli units). + If not present, default to 1000 (no actual gain applied). + $ref: /schemas/types.yaml#/definitions/uint32 + default: 1000 + + required: + - reg + + additionalProperties: false + unevaluatedProperties: false allOf: @@ -128,7 +166,21 @@ allOf: ainc-supply: false aind-supply: false + # Using channel to declare gain property only applies to adaq devices + - if: + properties: + compatible: + not: + contains: + enum: + - adi,adaq4370-4 + - adi,adaq4380-4 + then: + patternProperties: + "^channel@([0-3])$": false + # ad7380-4 uses refin-supply as external reference. + # adaq devices use internal reference only, derived from refin-supply # All other chips from ad738x family use refio as optional external reference. # When refio-supply is omitted, internal reference is used. - if: @@ -136,6 +188,8 @@ allOf: compatible: enum: - adi,ad7380-4 + - adi,adaq4370-4 + - adi,adaq4380-4 then: properties: refio-supply: false @@ -145,6 +199,24 @@ allOf: properties: refin-supply: false + # adaq devices need more supplies + - if: + properties: + compatible: + enum: + - adi,adaq4370-4 + - adi,adaq4380-4 + then: + required: + - vs-p-supply + - vs-n-supply + - ldo-supply + else: + properties: + vs-p-supply: false + vs-n-supply: false + ldo-supply: false + examples: - | #include <dt-bindings/interrupt-controller/irq.h> @@ -169,3 +241,48 @@ examples: refio-supply = <&supply_2_5V>; }; }; + + - | + #include <dt-bindings/interrupt-controller/irq.h> + + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "adi,adaq4380-4"; + reg = <0>; + + spi-cpol; + spi-cpha; + spi-max-frequency = <80000000>; + + interrupts = <27 IRQ_TYPE_EDGE_FALLING>; + interrupt-parent = <&gpio0>; + + vcc-supply = <&supply_3_3V>; + vlogic-supply = <&supply_3_3V>; + refin-supply = <&supply_5V>; + vs-p-supply = <&supply_5V>; + vs-n-supply = <&supply_0V>; + ldo-supply = <&supply_5V>; + + #address-cells = <1>; + #size-cells = <0>; + + channel@0 { + reg = <0>; + adi,gain-milli = <300>; + }; + + channel@2 { + reg = <2>; + adi,gain-milli = <600>; + }; + + channel@3 { + reg = <3>; + adi,gain-milli = <1000>; + }; + }; + }; -- 2.46.0
