From: Dumitru Ceclan <dumitru.ceclan@xxxxxxxxxx> Add support for: AD4111, AD4112, AD4114, AD4115, AD4116. AD411x family ADCs support a VCOM pin, dedicated for single-ended usage. AD4111/AD4112 support current channels, usage is implemented by specifying channel reg values bigger than 15. Signed-off-by: Dumitru Ceclan <dumitru.ceclan@xxxxxxxxxx> --- .../devicetree/bindings/iio/adc/adi,ad7173.yaml | 118 ++++++++++++++++++++- 1 file changed, 117 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml index ea6cfcd0aff4..6cc3514f5ed8 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml @@ -19,7 +19,18 @@ description: | primarily for measurement of signals close to DC but also delivers outstanding performance with input bandwidths out to ~10kHz. + Analog Devices AD411x ADC's: + The AD411X family encompasses a series of low power, low noise, 24-bit, + sigma-delta analog-to-digital converters that offer a versatile range of + specifications. They integrate an analog front end suitable for processing + fully differential/single-ended and bipolar voltage inputs. + Datasheets for supported chips: + https://www.analog.com/media/en/technical-documentation/data-sheets/AD4111.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD4112.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD4114.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD4115.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD4116.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-2.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-4.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD7173-8.pdf @@ -31,6 +42,11 @@ description: | properties: compatible: enum: + - adi,ad4111 + - adi,ad4112 + - adi,ad4114 + - adi,ad4115 + - adi,ad4116 - adi,ad7172-2 - adi,ad7172-4 - adi,ad7173-8 @@ -129,6 +145,31 @@ patternProperties: maximum: 15 diff-channels: + description: | + For using current channels specify select the current inputs + and enable the adi,current-channel property. + + Family AD411x supports a dedicated VCOM voltage input. + To select it set the second channel to 16. + (VIN2, VCOM) -> diff-channels = <2 16> + + There are special values that can be selected besides the voltage + analog inputs: + 21: REF+ + 22: REF− + Supported only by AD7172-2, AD7172-4, AD7175-2, AD7175-8, AD7177-2: + 19: ((AVDD1 − AVSS)/5)+ + 20: ((AVDD1 − AVSS)/5)− + Supported only by AD4111, AD4112: + 12: IIN3+ + 11: IIN3− + 13: IIN2+ + 10: IIN2− + 14: IIN1+ + 9: IIN1− + 15: IIN0+ + 8: IIN0− + items: minimum: 0 maximum: 31 @@ -154,6 +195,23 @@ patternProperties: - avdd default: refout-avss + adi,current-channel: + description: | + Signal that the selected inputs are current channels. + Only available on AD4111 and AD4112. + type: boolean + + adi,channel-type: + description: + Used to differentiate between different channel types as the device + register configurations are the same for all usage types. + $ref: /schemas/types.yaml#/definitions/string + enum: + - single-ended + - pseudo-differential + - differential + default: differential + required: - reg - diff-channels @@ -166,7 +224,6 @@ allOf: - $ref: /schemas/spi/spi-peripheral-props.yaml# # Only ad7172-4, ad7173-8 and ad7175-8 support vref2 - # Other models have [0-3] channel registers - if: properties: compatible: @@ -187,6 +244,37 @@ allOf: - vref - refout-avss - avdd + + - if: + properties: + compatible: + contains: + enum: + - adi,ad4114 + - adi,ad4115 + - adi,ad4116 + - adi,ad7173-8 + - adi,ad7175-8 + then: + patternProperties: + "^channel@[0-9a-f]$": + properties: + reg: + maximum: 15 + + - if: + properties: + compatible: + contains: + enum: + - adi,ad7172-2 + - adi,ad7175-2 + - adi,ad7176-2 + - adi,ad7177-2 + then: + patternProperties: + "^channel@[0-9a-f]$": + properties: reg: maximum: 3 @@ -210,6 +298,34 @@ allOf: required: - adi,reference-select + - if: + properties: + compatible: + contains: + enum: + - adi,ad4111 + - adi,ad4112 + - adi,ad4114 + - adi,ad4115 + - adi,ad4116 + then: + properties: + avdd2-supply: false + + - if: + properties: + compatible: + not: + contains: + enum: + - adi,ad4111 + - adi,ad4112 + then: + patternProperties: + "^channel@[0-9a-f]$": + properties: + adi,current-channel: false + - if: anyOf: - required: [clock-names] -- 2.43.0
