Bindings/iio/adc/ti,adc12138.yaml

   1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/iio/adc/ti,adc12138.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Texas Instruments ADC12138 and similar self-calibrating ADCs
   8
   9 maintainers:
  10   - Akinobu Mita <akinobu.mita@gmail.com>
  11
  12 description: |
  13   13 bit ADCs with 1, 2 or 8 inputs and self calibrating circuitry to
  14   correct for linearity, zero and full scale errors.
  15
  16 properties:
  17   compatible:
  18     enum:
  19       - ti,adc12130
  20       - ti,adc12132
  21       - ti,adc12138
  22
  23   reg:
  24     maxItems: 1
  25
  26   interrupts:
  27     maxItems: 1
  28     description: End of Conversion (EOC) interrupt
  29
  30   clocks:
  31     maxItems: 1
  32     description: Conversion clock input.
  33
  34   vref-p-supply:
  35     description: The regulator supply for positive analog voltage reference
  36
  37   vref-n-supply:
  38     description: |
  39       The regulator supply for negative analog voltage reference
  40       (Note that this must not go below GND or exceed vref-p)
  41       If not specified, this is assumed to be analog ground.
  42
  43   ti,acquisition-time:
  44     $ref: /schemas/types.yaml#/definitions/uint32
  45     enum: [ 6, 10, 18, 34 ]
  46     description: |
  47       The number of conversion clock periods for the S/H's acquisition time.
  48       For high source impedances, this value can be increased to 18 or 34.
  49       For less ADC accuracy and/or slower CCLK frequencies this value may be
  50       decreased to 6.  See section 6.0 INPUT SOURCE RESISTANCE in the
  51       datasheet for details.
  52
  53   "#io-channel-cells":
  54     const: 1
  55
  56 required:
  57   - compatible
  58   - reg
  59   - interrupts
  60   - clocks
  61   - vref-p-supply
  62
  63 allOf:
  64   - $ref: /schemas/spi/spi-peripheral-props.yaml#
  65
  66 unevaluatedProperties: false
  67
  68 examples:
  69   - |
  70     #include <dt-bindings/interrupt-controller/irq.h>
  71     spi {
  72         #address-cells = <1>;
  73         #size-cells = <0>;
  74
  75         adc@0 {
  76             compatible = "ti,adc12138";
  77             reg = <0>;
  78             interrupts = <28 IRQ_TYPE_EDGE_RISING>;
  79             interrupt-parent = <&gpio1>;
  80             clocks = <&cclk>;
  81             vref-p-supply = <&ldo4_reg>;
  82             spi-max-frequency = <5000000>;
  83             ti,acquisition-time = <6>;
  84             #io-channel-cells = <1>;
  85         };
  86     };
  87 ...