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     1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/iio/potentiostat/ti,lmp91000.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Texas Instruments LMP91000 series of potentiostats with I2C control
    8 
    9 maintainers:
   10   - Matt Ranostay <matt.ranostay@konsulko.com>
   11 
   12 description: |
   13   Typically used as a signal conditioner for chemical sensors.
   14   LMP91000: https://www.ti.com/lit/ds/symlink/lmp91000.pdf
   15   LMP91002: https://www.ti.com/lit/ds/symlink/lmp91002.pdf
   16 
   17 properties:
   18   compatible:
   19     enum:
   20       - ti,lmp91000
   21       - ti,lmp91002
   22 
   23   reg:
   24     maxItems: 1
   25 
   26   io-channels:
   27     maxItems: 1
   28 
   29   ti,external-tia-resistor:
   30     $ref: /schemas/types.yaml#/definitions/flag
   31     description:
   32       If the property ti,tia-gain-ohm is not defined this needs to be set to
   33       signal that an external resistor value is being used.
   34 
   35   ti,tia-gain-ohm:
   36     $ref: /schemas/types.yaml#/definitions/uint32
   37     enum: [2750, 3500, 7000, 14000, 35000, 120000, 350000]
   38     description:
   39       Internal resistor for the transimpedance amplifier.
   40 
   41   ti,rload-ohm:
   42     $ref: /schemas/types.yaml#/definitions/uint32
   43     enum: [10, 33, 50, 100]
   44     description:
   45       Internal resistor load applied to the gas sensor.
   46       Default 100 Ohms.
   47 
   48 required:
   49   - compatible
   50   - reg
   51   - io-channels
   52 
   53 additionalProperties: false
   54 
   55 examples:
   56   - |
   57     i2c {
   58         #address-cells = <1>;
   59         #size-cells = <0>;
   60         lmp91000@48 {
   61             compatible = "ti,lmp91000";
   62             reg = <0x48>;
   63             ti,tia-gain-ohm = <7000>;
   64             ti,rload-ohm = <100>;
   65             io-channels = <&adc>;
   66         };
   67     };
   68 ...
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