Bindings/iio/adc/adi,ad7124.yaml

   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,ad7124.yaml#
   6 $schema: http://devicetree.org/meta-schemas/core.yaml#
   7
   8 title: Analog Devices AD7124 ADC device driver
   9
  10 maintainers:
  11   - Stefan Popa <stefan.popa@analog.com>
  12
  13 description: |
  14   Bindings for the Analog Devices AD7124 ADC device. Datasheet can be
  15   found here:
  16     https://www.analog.com/media/en/technical-documentation/data-sheets/AD7124-8.pdf
  17
  18 properties:
  19   compatible:
  20     enum:
  21       - adi,ad7124-4
  22       - adi,ad7124-8
  23
  24   reg:
  25     description: SPI chip select number for the device
  26     maxItems: 1
  27
  28   clocks:
  29     maxItems: 1
  30     description: phandle to the master clock (mclk)
  31
  32   clock-names:
  33     items:
  34       - const: mclk
  35
  36   interrupts:
  37     description: IRQ line for the ADC
  38     maxItems: 1
  39
  40   '#address-cells':
  41     const: 1
  42
  43   '#size-cells':
  44     const: 0
  45
  46   refin1-supply:
  47     description: refin1 supply can be used as reference for conversion.
  48
  49   refin2-supply:
  50     description: refin2 supply can be used as reference for conversion.
  51
  52   avdd-supply:
  53     description: avdd supply can be used as reference for conversion.
  54
  55 required:
  56   - compatible
  57   - reg
  58   - clocks
  59   - clock-names
  60   - interrupts
  61
  62 patternProperties:
  63   "^channel@([0-9]|1[0-5])$":
  64     $ref: adc.yaml
  65     type: object
  66     description: |
  67       Represents the external channels which are connected to the ADC.
  68
  69     properties:
  70       reg:
  71         description: |
  72           The channel number. It can have up to 8 channels on ad7124-4
  73           and 16 channels on ad7124-8, numbered from 0 to 15.
  74         items:
  75           minimum: 0
  76           maximum: 15
  77
  78       adi,reference-select:
  79         description: |
  80           Select the reference source to use when converting on
  81           the specific channel. Valid values are:
  82           0: REFIN1(+)/REFIN1(−).
  83           1: REFIN2(+)/REFIN2(−).
  84           3: AVDD
  85           If this field is left empty, internal reference is selected.
  86         $ref: /schemas/types.yaml#/definitions/uint32
  87         enum: [0, 1, 3]
  88
  89       diff-channels: true
  90
  91       bipolar: true
  92
  93       adi,buffered-positive:
  94         description: Enable buffered mode for positive input.
  95         type: boolean
  96
  97       adi,buffered-negative:
  98         description: Enable buffered mode for negative input.
  99         type: boolean
 100
 101     required:
 102       - reg
 103       - diff-channels
 104
 105     additionalProperties: false
 106
 107 allOf:
 108   - $ref: /schemas/spi/spi-peripheral-props.yaml#
 109
 110 unevaluatedProperties: false
 111
 112 examples:
 113   - |
 114     spi {
 115       #address-cells = <1>;
 116       #size-cells = <0>;
 117
 118       adc@0 {
 119         compatible = "adi,ad7124-4";
 120         reg = <0>;
 121         spi-max-frequency = <5000000>;
 122         interrupts = <25 2>;
 123         interrupt-parent = <&gpio>;
 124         refin1-supply = <&adc_vref>;
 125         clocks = <&ad7124_mclk>;
 126         clock-names = "mclk";
 127
 128         #address-cells = <1>;
 129         #size-cells = <0>;
 130
 131         channel@0 {
 132           reg = <0>;
 133           diff-channels = <0 1>;
 134           adi,reference-select = <0>;
 135           adi,buffered-positive;
 136         };
 137
 138         channel@1 {
 139           reg = <1>;
 140           bipolar;
 141           diff-channels = <2 3>;
 142           adi,reference-select = <0>;
 143           adi,buffered-positive;
 144           adi,buffered-negative;
 145         };
 146
 147         channel@2 {
 148           reg = <2>;
 149           diff-channels = <4 5>;
 150         };
 151
 152         channel@3 {
 153           reg = <3>;
 154           diff-channels = <6 7>;
 155         };
 156       };
 157     };