Commit bc4d251e authored by Mike Looijmans's avatar Mike Looijmans Committed by Jonathan Cameron
Browse files

dt-bindings: iio: adc: ti-ads1298: Add bindings 



Bindings for the TI ADS1298 medical ADC. This device is
typically used for ECG and similar measurements. Supports data
acquisition at configurable scale and sampling frequency.

The device has so many options for connecting stuff, at this
point the bindings aren't nearly complete but partial bindings
are better than no bindings at all.

Signed-off-by: default avatarMike Looijmans <mike.looijmans@topic.nl>
Reviewed-by: default avatarConor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240216153020.485201-1-mike.looijmans@topic.nl


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 05f5d788

Documentation/devicetree/bindings/iio/adc/ti,ads1298.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/iio/adc/ti,ads1298.yaml#

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



title: Texas Instruments' ads1298 medical ADC chips



description: |

  Datasheet at: https://www.ti.com/product/ADS1298

  Bindings for this chip aren't complete.



maintainers:

  - Mike Looijmans <mike.looijmans@topic.nl>



properties:

  compatible:

    enum:

      - ti,ads1298



  reg:

    maxItems: 1



  spi-cpha: true



  reset-gpios:

    maxItems: 1



  avdd-supply:

    description:

      Analog power supply, voltage between AVDD and AVSS. When providing a

      symmetric +/- 2.5V, the regulator should report 5V.



  vref-supply:

    description:

      Optional reference voltage. If omitted, internal reference is used,

      which is 2.4V when analog supply is below 4.4V, 4V otherwise.



  clocks:

    description: Optional 2.048 MHz external source clock on CLK pin

    maxItems: 1



  interrupts:

    description: Interrupt on DRDY pin, triggers on falling edge

    maxItems: 1



  label: true



required:

  - compatible

  - reg

  - avdd-supply

  - interrupts



allOf:

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



unevaluatedProperties: false



examples:

  - |

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

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

    spi {

        #address-cells = <1>;

        #size-cells = <0>;



        adc@1 {

          reg = <1>;

          compatible = "ti,ads1298";

          label = "ads1298-1-ecg";

          avdd-supply = <&reg_iso_5v_a>;

          clocks = <&clk_ads1298>;

          interrupt-parent = <&gpio0>;

          interrupts = <78 IRQ_TYPE_EDGE_FALLING>;

          spi-max-frequency = <20000000>;

          spi-cpha;

        };

    };

...