adi,ad7476.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
    2 # Copyright 2019 Analog Devices Inc.
    3 %YAML 1.2
    4 ---
    5 $id: http://devicetree.org/schemas/iio/adc/adi,ad7476.yaml#
    6 $schema: http://devicetree.org/meta-schemas/core.yaml#
    7 
    8 title: AD7476 and similar simple SPI ADCs from multiple manufacturers.
    9 
   10 maintainers:
   11   - Michael Hennerich <michael.hennerich@analog.com>
   12 
   13 description: |
   14   A lot of simple SPI ADCs have very straight forward interfaces.
   15   They typically don't provide a MOSI pin, simply reading out data
   16   on MISO when the clock toggles.
   17 
   18 properties:
   19   compatible:
   20     enum:
   21       - adi,ad7091
   22       - adi,ad7091r
   23       - adi,ad7273
   24       - adi,ad7274
   25       - adi,ad7276
   26       - adi,ad7277
   27       - adi,ad7278
   28       - adi,ad7466
   29       - adi,ad7467
   30       - adi,ad7468
   31       - adi,ad7475
   32       - adi,ad7476
   33       - adi,ad7476a
   34       - adi,ad7477
   35       - adi,ad7477a
   36       - adi,ad7478
   37       - adi,ad7478a
   38       - adi,ad7495
   39       - adi,ad7910
   40       - adi,ad7920
   41       - adi,ad7940
   42       - ti,adc081s
   43       - ti,adc101s
   44       - ti,adc121s
   45       - ti,ads7866
   46       - ti,ads7867
   47       - ti,ads7868
   48       - lltc,ltc2314-14
   49 
   50   reg:
   51     maxItems: 1
   52 
   53   vcc-supply:
   54     description:
   55       Main powersupply voltage for the chips, sometimes referred to as VDD on
   56       datasheets.  If there is no separate vref-supply, then this is needed
   57       to establish channel scaling.
   58 
   59   vdrive-supply:
   60     description:
   61       Some devices have separate supply for their digital control side.
   62 
   63   vref-supply:
   64     description:
   65       Some devices have a specific reference voltage supplied on a different pin
   66       to the other supplies. Needed to be able to establish channel scaling
   67       unless there is also an internal reference available (e.g. ad7091r)
   68 
   69   spi-max-frequency: true
   70 
   71   adi,conversion-start-gpios:
   72     description: A GPIO used to trigger the start of a conversion
   73     maxItems: 1
   74 
   75 required:
   76   - compatible
   77   - reg
   78 
   79 additionalProperties: false
   80 
   81 allOf:
   82   # Devices where reference is vcc
   83   - if:
   84       properties:
   85         compatible:
   86           contains:
   87             enum:
   88               - adi,ad7091
   89               - adi,ad7276
   90               - adi,ad7277
   91               - adi,ad7278
   92               - adi,ad7466
   93               - adi,ad7467
   94               - adi,ad7468
   95               - adi,ad7940
   96               - ti,adc081s
   97               - ti,adc101s
   98               - ti,adc121s
   99               - ti,ads7866
  100               - ti,ads7868
  101     then:
  102       required:
  103         - vcc-supply
  104   # Devices with a vref
  105   - if:
  106       properties:
  107         compatible:
  108           contains:
  109             enum:
  110               - adi,ad7091r
  111               - adi,ad7273
  112               - adi,ad7274
  113               - adi,ad7475
  114               - lltc,ltc2314-14
  115     then:
  116       properties:
  117         vref-supply: true
  118     else:
  119       properties:
  120         vref-supply: false
  121   # Devices with a vref where it is not optional
  122   - if:
  123       properties:
  124         compatible:
  125           contains:
  126             enum:
  127               - adi,ad7273
  128               - adi,ad7274
  129               - adi,ad7475
  130               - lltc,ltc2314-14
  131     then:
  132       required:
  133         - vref-supply
  134   - if:
  135       properties:
  136         compatible:
  137           contains:
  138             enum:
  139               - adi,ad7475
  140               - adi,ad7495
  141     then:
  142       properties:
  143         vdrive-supply: true
  144     else:
  145       properties:
  146         vdrive-supply: false
  147   - if:
  148       properties:
  149         compatible:
  150           contains:
  151             enum:
  152               - adi,ad7091
  153               - adi,ad7091r
  154     then:
  155       properties:
  156         adi,conversion-start-gpios: true
  157     else:
  158       properties:
  159         adi,conversion-start-gpios: false
  160 
  161 examples:
  162   - |
  163     spi {
  164       #address-cells = <1>;
  165       #size-cells = <0>;
  166 
  167       adc@0 {
  168         compatible = "adi,ad7091r";
  169         reg = <0>;
  170         spi-max-frequency = <5000000>;
  171         vcc-supply = <&adc_vcc>;
  172         vref-supply = <&adc_vref>;
  173       };
  174     };
  175 ...

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/iio/adc/adi,ad7476.yaml

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sys/contrib/device-tree/Bindings/iio/adc/adi,ad7476.yaml