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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

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%YAML 1.2

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---

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$id: http://devicetree.org/schemas/iio/adc/adi,ad7091r5.yaml#

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$schema: http://devicetree.org/meta-schemas/core.yaml#

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title: Analog Devices AD7091R-2/-4/-5/-8 Multi-Channel 12-Bit ADCs

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maintainers:

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  - Michael Hennerich <michael.hennerich@analog.com>

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  - Marcelo Schmitt <marcelo.schmitt@analog.com>

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description: |

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  Analog Devices AD7091R5 4-Channel 12-Bit ADC supporting I2C interface

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  https://www.analog.com/media/en/technical-documentation/data-sheets/ad7091r-5.pdf

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  Analog Devices AD7091R-2/AD7091R-4/AD7091R-8 2-/4-/8-Channel 12-Bit ADCs

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  supporting SPI interface

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  https://www.analog.com/media/en/technical-documentation/data-sheets/AD7091R-2_7091R-4_7091R-8.pdf

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properties:

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  compatible:

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    enum:

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      - adi,ad7091r2

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      - adi,ad7091r4

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      - adi,ad7091r5

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      - adi,ad7091r8

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  reg:

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    maxItems: 1

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  vdd-supply:

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    description:

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      Provide VDD power to the sensor (VDD range is from 2.7V to 5.25V).

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  vdrive-supply:

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    description:

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      Determines the voltage level at which the interface logic will operate.

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      The V_drive voltage range is from 1.8V to 5.25V and must not exceed VDD by

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      more than 0.3V.

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  vref-supply:

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    description:

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      Phandle to the vref power supply

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  convst-gpios:

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    description:

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      GPIO connected to the CONVST pin.

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      This logic input is used to initiate conversions on the analog

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      input channels.

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    maxItems: 1

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  reset-gpios:

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    maxItems: 1

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  interrupts:

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    description:

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      Interrupt for signaling when conversion results exceed the high limit for

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      ADC readings or fall below the low limit for them. Interrupt source must

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      be attached to ALERT/BUSY/GPO0 pin.

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    maxItems: 1

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required:

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  - compatible

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  - reg

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allOf:

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  - $ref: /schemas/spi/spi-peripheral-props.yaml#

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  # AD7091R-2 does not have ALERT/BUSY/GPO pin

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  - if:

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      properties:

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        compatible:

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          contains:

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            enum:

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              - adi,ad7091r2

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    then:

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      properties:

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        interrupts: false

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  - if:

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      properties:

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        compatible:

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          contains:

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            enum:

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              - adi,ad7091r2

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              - adi,ad7091r4

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              - adi,ad7091r8

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    then:

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      required:

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        - convst-gpios

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unevaluatedProperties: false

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examples:

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  - |

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    #include <dt-bindings/gpio/gpio.h>

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    #include <dt-bindings/interrupt-controller/irq.h>

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    i2c {

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        #address-cells = <1>;

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        #size-cells = <0>;

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        adc@2f {

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            compatible = "adi,ad7091r5";

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            reg = <0x2f>;

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            interrupts = <25 IRQ_TYPE_EDGE_FALLING>;

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            interrupt-parent = <&gpio>;

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        };

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    };

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  - |

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    #include <dt-bindings/gpio/gpio.h>

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    #include <dt-bindings/interrupt-controller/irq.h>

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    spi {

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        #address-cells = <1>;

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        #size-cells = <0>;

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        adc@0 {

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            compatible = "adi,ad7091r8";

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            reg = <0x0>;

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            spi-max-frequency = <1000000>;

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            vref-supply = <&adc_vref>;

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            convst-gpios = <&gpio 25 GPIO_ACTIVE_LOW>;

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            reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>;

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            interrupts = <22 IRQ_TYPE_EDGE_FALLING>;

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            interrupt-parent = <&gpio>;

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        };

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    };

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...

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