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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.yaml
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)

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%YAML 1.2

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---

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$id: http://devicetree.org/schemas/iio/adc/fsl,imx25-gcq.yaml#

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

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title: Freescale ADC GCQ device

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description:

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  This is a generic conversion queue device that can convert any of the

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  analog inputs using the ADC unit of the i.MX25.

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maintainers:

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  - Jonathan Cameron <jic23@kernel.org>

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properties:

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  compatible:

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    const: fsl,imx25-gcq

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  reg:

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    maxItems: 1

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  interrupts:

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    maxItems: 1

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  vref-ext-supply:

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    description:

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      The regulator supplying the ADC reference voltage.

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      Required when at least one subnode uses the this reference.

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  vref-xp-supply:

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    description:

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      The regulator supplying the ADC reference voltage on pin XP.

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      Required when at least one subnode uses this reference.

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  vref-yp-supply:

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    description:

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      The regulator supplying the ADC reference voltage on pin YP.

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      Required when at least one subnode uses this reference.

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  "#io-channel-cells":

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    const: 1

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  "#address-cells":

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    const: 1

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  "#size-cells":

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    const: 0

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required:

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  - compatible

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  - reg

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  - interrupts

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  - "#address-cells"

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  - "#size-cells"

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patternProperties:

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  "[a-z][a-z0-9]+@[0-9a-f]+$":

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    type: object

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    description:

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      Child nodes used to define the reference voltages used for each channel

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    properties:

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      reg:

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        description: |

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          Number of the analog input.

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          0: xp

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          1: yp

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          2: xn

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          3: yn

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          4: wiper

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          5: inaux0

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          6: inaux1

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          7: inaux2

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        items:

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          - minimum: 0

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            maximum: 7

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      fsl,adc-refp:

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        $ref: /schemas/types.yaml#/definitions/uint32

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        description: |

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          Specifies the positive reference input as defined in

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          <dt-bindings/iio/adc/fsl-imx25-gcq.h>

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          0: YP voltage reference

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          1: XP voltage reference

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          2: External voltage reference

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          3: Internal voltage reference (default)

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        minimum: 0

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        maximum: 3

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      fsl,adc-refn:

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        $ref: /schemas/types.yaml#/definitions/uint32

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        description: |

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          Specifies the negative reference input as defined in

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          <dt-bindings/iio/adc/fsl-imx25-gcq.h>

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          0: XN ground reference

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          1: YN ground reference

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          2: Internal ground reference

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          3: External ground reference (default)

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        minimum: 0

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        maximum: 3

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    required:

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      - reg

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    additionalProperties: false

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additionalProperties: false

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examples:

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  - |

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    #include <dt-bindings/iio/adc/fsl-imx25-gcq.h>

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    soc {

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        #address-cells = <1>;

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        #size-cells = <1>;

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        adc@50030800 {

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            compatible = "fsl,imx25-gcq";

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            reg = <0x50030800 0x60>;

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            interrupt-parent = <&tscadc>;

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            interrupts = <1>;

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            #address-cells = <1>;

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            #size-cells = <0>;

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            inaux@5 {

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                reg = <5>;

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                fsl,adc-refp = <MX25_ADC_REFP_INT>;

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                fsl,adc-refn = <MX25_ADC_REFN_NGND>;

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            };

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        };

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    };

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...

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