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charset="utf-8" The driver will support the AD7606C-16 and AD7606C-18. This change adds the compatible strings for these devices. The AD7606C-16,18 channels also support these (individually configurable) types of channels: - bipolar single-ended - unipolar single-ended - bipolar differential Reviewed-by: Krzysztof Kozlowski Signed-off-by: Alexandru Ardelean --- .../bindings/iio/adc/adi,ad7606.yaml | 120 ++++++++++++++++++ 1 file changed, 120 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml b/Do= cumentation/devicetree/bindings/iio/adc/adi,ad7606.yaml index 69408cae3db9..bec7cfba52a7 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml @@ -14,6 +14,8 @@ description: | https://www.analog.com/media/en/technical-documentation/data-sheets/AD76= 05-4.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/ad76= 06_7606-6_7606-4.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD76= 06B.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/ad76= 06c-16.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/ad76= 06c-18.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD76= 16.pdf =20 properties: @@ -24,11 +26,19 @@ properties: - adi,ad7606-6 - adi,ad7606-8 # Referred to as AD7606 (without -8) in the datasheet - adi,ad7606b + - adi,ad7606c-16 + - adi,ad7606c-18 - adi,ad7616 =20 reg: maxItems: 1 =20 + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + spi-cpha: true =20 spi-cpol: true @@ -114,6 +124,47 @@ properties: assumed that the pins are hardwired to VDD. type: boolean =20 +patternProperties: + "^channel@[1-8]$": + type: object + $ref: adc.yaml + unevaluatedProperties: false + + properties: + reg: + description: + The channel number, as specified in the datasheet (from 1 to 8). + minimum: 1 + maximum: 8 + + diff-channels: + description: + Each channel can be configured as a bipolar differential channel. + The ADC uses the same positive and negative inputs for this. + This property must be specified as 'reg' (or the channel number)= for + both positive and negative inputs (i.e. diff-channels =3D ). + Since the configuration is bipolar differential, the 'bipolar' + property is required. + items: + minimum: 1 + maximum: 8 + + bipolar: + description: + The ADC channels can be configured as + * Bipolar single-ended + * Unipolar single-ended + * Bipolar differential + Therefore in the DT, if no channel node is specified, it is cons= idered + 'unipolar single-ended'. So for the other configurations the 'bi= polar' + property must be specified. If 'diff-channels' is specified, it = is + considered a bipolar differential channel. Otherwise it is bipol= ar + single-ended. + + required: + - reg + - bipolar + required: - compatible - reg @@ -170,6 +221,25 @@ allOf: adi,conversion-start-gpios: maxItems: 1 =20 + - if: + not: + required: + - adi,sw-mode + then: + patternProperties: + "^channel@[1-8]$": false + + - if: + not: + properties: + compatible: + enum: + - adi,ad7606c-16 + - adi,ad7606c-18 + then: + patternProperties: + "^channel@[1-8]$": false + unevaluatedProperties: false =20 examples: @@ -202,4 +272,54 @@ examples: standby-gpios =3D <&gpio 24 GPIO_ACTIVE_LOW>; }; }; + - | + #include + #include + spi { + #address-cells =3D <1>; + #size-cells =3D <0>; + + adc@0 { + compatible =3D "adi,ad7606c-18"; + reg =3D <0>; + + #address-cells =3D <1>; + #size-cells =3D <0>; + + spi-max-frequency =3D <1000000>; + spi-cpol; + spi-cpha; + + avcc-supply =3D <&adc_vref>; + vdrive-supply =3D <&vdd_supply>; + + interrupts =3D <25 IRQ_TYPE_EDGE_FALLING>; + interrupt-parent =3D <&gpio>; + + adi,conversion-start-gpios =3D <&gpio 17 GPIO_ACTIVE_HIGH>; + reset-gpios =3D <&gpio 27 GPIO_ACTIVE_HIGH>; + adi,first-data-gpios =3D <&gpio 22 GPIO_ACTIVE_HIGH>; + standby-gpios =3D <&gpio 24 GPIO_ACTIVE_LOW>; + + adi,sw-mode; + + channel@1 { + reg =3D <1>; + diff-channels =3D <1 1>; + bipolar; + }; + + channel@3 { + reg =3D <3>; + bipolar; + }; + + channel@8 { + reg =3D <8>; + diff-channels =3D <8 8>; + bipolar; + }; + + }; + }; ... --=20 2.46.0