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.. dtcompatible:: ti,ads131m02
.. _dtbinding_ti_ads131m02:

ti,ads131m02 (on spi bus)
#########################

Vendor: :ref:`Texas Instruments <dt_vendor_ti>`

.. note::

   An implementation of a driver matching this compatible is available in
   :zephyr_file:`drivers/adc/adc_ads131m02.c`.

Description
***********



.. code-block:: none

   Texas Instrument 2 channels SPI ADC

Properties
**********

Top level properties
====================


These property descriptions apply to "ti,ads131m02"
nodes themselves. This page also describes child node
properties in the following sections.

.. tabs::

   .. group-tab:: Node specific properties

      Properties not inherited from the base binding file.

      .. list-table::
         :widths: 1 1 4
         :header-rows: 1

         * - Name
           - Type
           - Details

         * - ``#io-channel-cells``
           - ``int``
           - This property is **required**.

             Constant value: ``1``

         * - ``drdy-gpios``
           - ``phandle-array``
           - .. code-block:: none

                GPIO for data ready, becomes active when a conversion result is ready.
                By default, it is active low signal.



             This property is **required**.

         * - ``spi-max-frequency``
           - ``int``
           - .. code-block:: none

                Maximum clock frequency of device's SPI interface in Hz


             This property is **required**.

         * - ``duplex``
           - ``int``
           - .. code-block:: none

                Duplex mode, full or half. By default it's always full duplex thus 0
                as this is, by far, the most common mode.
                Use the macros not the actual enum value, here is the concordance
                list (see dt-bindings/spi/spi.h)
                  0    SPI_FULL_DUPLEX
                  2048 SPI_HALF_DUPLEX



             Legal values: ``0``, ``2048``

         * - ``frame-format``
           - ``int``
           - .. code-block:: none

                Motorola or TI frame format. By default it's always Motorola's,
                thus 0 as this is, by far, the most common format.
                Use the macros not the actual enum value, here is the concordance
                list (see dt-bindings/spi/spi.h)
                  0     SPI_FRAME_FORMAT_MOTOROLA
                  32768 SPI_FRAME_FORMAT_TI



             Legal values: ``0``, ``32768``

         * - ``spi-cpol``
           - ``boolean``
           - .. code-block:: none

                SPI clock polarity which indicates the clock idle state.
                If it is used, the clock idle state is logic high; otherwise, low.



         * - ``spi-cpha``
           - ``boolean``
           - .. code-block:: none

                SPI clock phase that indicates on which edge data is sampled.
                If it is used, data is sampled on the second edge; otherwise, on the first edge.



         * - ``spi-hold-cs``
           - ``boolean``
           - .. code-block:: none

                In some cases, it is necessary for the master to manage SPI chip select
                under software control, so that multiple spi transactions can be performed
                without releasing it. A typical use case is variable length SPI packets
                where the first spi transaction reads the length and the second spi transaction
                reads length bytes.



         * - ``supply-gpios``
           - ``phandle-array``
           - .. code-block:: none

                GPIO specifier that controls power to the device.

                This property should be provided when the device has a dedicated
                switch that controls power to the device.  The supply state is
                entirely the responsibility of the device driver.

                Contrast with vin-supply.



         * - ``vin-supply``
           - ``phandle``
           - .. code-block:: none

                Reference to the regulator that controls power to the device.
                The referenced devicetree node must have a regulator compatible.

                This property should be provided when device power is supplied
                by a shared regulator.  The supply state is dependent on the
                request status of all devices fed by the regulator.

                Contrast with supply-gpios.  If both properties are provided
                then the regulator must be requested before the supply GPIOS is
                set to an active state, and the supply GPIOS must be set to an
                inactive state before releasing the regulator.





   .. group-tab:: Deprecated node specific properties

      Deprecated properties not inherited from the base binding file.

      (None)

   .. group-tab:: Base properties

      Properties inherited from the base binding file, which defines
      common properties that may be set on many nodes. Not all of these
      may apply to the "ti,ads131m02" compatible.

      .. list-table::
         :widths: 1 1 4
         :header-rows: 1

         * - Name
           - Type
           - Details

         * - ``#address-cells``
           - ``int``
           - .. code-block:: none

                This property encodes the number of <u32> cells used by address fields
                in "reg" properties in this node's children.

                For details, see "2.3.5 #address-cells and #size-cells" in Devicetree
                Specification v0.4.



             Constant value: ``1``

         * - ``#size-cells``
           - ``int``
           - .. code-block:: none

                This property encodes the number of <u32> cells used by size fields in
                "reg" properties in this node's children.

                For details, see "2.3.5 #address-cells and #size-cells" in Devicetree
                Specification v0.4.



         * - ``status``
           - ``string``
           - .. code-block:: none

                Indicates the operational status of the hardware or other
                resource that the node represents. In particular:

                  - "okay" means the resource is operational and, for example,
                    can be used by device drivers
                  - "disabled" means the resource is not operational and the system
                    should treat it as if it is not present

                For details, see "2.3.4 status" in Devicetree Specification v0.4.



             Legal values: ``'ok'``, ``'okay'``, ``'disabled'``, ``'reserved'``, ``'fail'``, ``'fail-sss'``

             See :ref:`zephyr:dt-important-props` for more information.

         * - ``compatible``
           - ``string-array``
           - .. code-block:: none

                This property is a list of strings that essentially define what
                type of hardware or other resource this devicetree node
                represents. Each device driver checks for specific compatible
                property values to find the devicetree nodes that represent
                resources that the driver should manage.

                The recommended format is "vendor,device", The "vendor" part is
                an abbreviated name of the vendor. The "device" is usually from
                the datasheet.

                The compatible property can have multiple values, ordered from
                most- to least-specific. Having additional values is useful when the
                device is a specific instance of a more general family, to allow the
                system to match the most specific driver available.

                For details, see "2.3.1 compatible" in Devicetree Specification v0.4.



             This property is **required**.

             See :ref:`zephyr:dt-important-props` for more information.

         * - ``reg``
           - ``array``
           - .. code-block:: none

                Information used to address the device. The value is specific to
                the device (i.e. is different depending on the compatible
                property).

                The "reg" property is typically a sequence of (address, length) pairs.
                Each pair is called a "register block". Values are
                conventionally written in hex.

                For details, see "2.3.6 reg" in Devicetree Specification v0.4.



             This property is **required**.

             See :ref:`zephyr:dt-important-props` for more information.

         * - ``reg-names``
           - ``string-array``
           - .. code-block:: none

                Optional names given to each register block in the "reg" property.
                For example:

                  / {
                       soc {
                           #address-cells = <1>;
                           #size-cells = <1>;

                           uart@1000 {
                               reg = <0x1000 0x2000>, <0x3000 0x4000>;
                               reg-names = "foo", "bar";
                           };
                       };
                  };

                The uart@1000 node has two register blocks:

                  - one with base address 0x1000, size 0x2000, and name "foo"
                  - another with base address 0x3000, size 0x4000, and name "bar"



         * - ``interrupts``
           - ``array``
           - .. code-block:: none

                Information about interrupts generated by the device, encoded as an array
                of one or more interrupt specifiers. The format of the data in this property
                varies by where the device appears in the interrupt tree. Devices with the same
                "interrupt-parent" will use the same format in their interrupts properties.

                For details, see "2.4 Interrupts and Interrupt Mapping" in
                Devicetree Specification v0.4.



             See :ref:`zephyr:dt-important-props` for more information.

         * - ``interrupts-extended``
           - ``compound``
           - .. code-block:: none

                Extended interrupt specifier for device, used as an alternative to
                the "interrupts" property.

                For details, see "2.4 Interrupts and Interrupt Mapping" in
                Devicetree Specification v0.4.



         * - ``interrupt-names``
           - ``string-array``
           - .. code-block:: none

                Optional names given to each interrupt generated by a device.
                The interrupts themselves are defined in either "interrupts" or
                "interrupts-extended" properties.

                For details, see "2.4 Interrupts and Interrupt Mapping" in
                Devicetree Specification v0.4.



         * - ``interrupt-parent``
           - ``phandle``
           - .. code-block:: none

                If present, this refers to the node which handles interrupts generated
                by this device.

                For details, see "2.4 Interrupts and Interrupt Mapping" in
                Devicetree Specification v0.4.



         * - ``label``
           - ``string``
           - .. code-block:: none

                Human readable string describing the device. Use of this property is
                deprecated except as needed on a case-by-case basis.

                For details, see "4.1.2 Miscellaneous Properties" in Devicetree
                Specification v0.4.



             See :ref:`zephyr:dt-important-props` for more information.

         * - ``clocks``
           - ``phandle-array``
           - .. code-block:: none

                Information about the device's clock providers. In general, this property
                should follow conventions established in the dt-schema binding:

                  https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/clock/clock.yaml



         * - ``clock-names``
           - ``string-array``
           - .. code-block:: none

                Optional names given to each clock provider in the "clocks" property.



         * - ``dmas``
           - ``phandle-array``
           - .. code-block:: none

                DMA channel specifiers relevant to the device.



         * - ``dma-names``
           - ``string-array``
           - .. code-block:: none

                Optional names given to the DMA channel specifiers in the "dmas" property.



         * - ``io-channels``
           - ``phandle-array``
           - .. code-block:: none

                IO channel specifiers relevant to the device.



         * - ``io-channel-names``
           - ``string-array``
           - .. code-block:: none

                Optional names given to the IO channel specifiers in the "io-channels" property.



         * - ``mboxes``
           - ``phandle-array``
           - .. code-block:: none

                Mailbox / IPM channel specifiers relevant to the device.



         * - ``mbox-names``
           - ``string-array``
           - .. code-block:: none

                Optional names given to the mbox specifiers in the "mboxes" property.



         * - ``power-domains``
           - ``phandle-array``
           - .. code-block:: none

                Power domain specifiers relevant to the device.



         * - ``power-domain-names``
           - ``string-array``
           - .. code-block:: none

                Optional names given to the power domain specifiers in the "power-domains" property.



         * - ``#power-domain-cells``
           - ``int``
           - .. code-block:: none

                Number of cells in power-domains property



         * - ``zephyr,deferred-init``
           - ``boolean``
           - .. code-block:: none

                Do not initialize device automatically on boot. Device should be manually
                initialized using device_init().



         * - ``wakeup-source``
           - ``boolean``
           - .. code-block:: none

                Property to identify that a device can be used as wake up source.

                When this property is provided a specific flag is set into the
                device that tells the system that the device is capable of
                wake up the system.

                Wake up capable devices are disabled (interruptions will not wake up
                the system) by default but they can be enabled at runtime if necessary.



         * - ``zephyr,pm-device-runtime-auto``
           - ``boolean``
           - .. code-block:: none

                Automatically configure the device for runtime power management after the
                init function runs.



         * - ``zephyr,disabling-power-states``
           - ``phandles``
           - .. code-block:: none

                List of power states that will disable this device power.






Child node properties
=====================

.. list-table::
   :widths: 1 1 4
   :header-rows: 1

   * - Name
     - Type
     - Details

   * - ``reg``
     - ``array``
     - .. code-block:: none

          Channel identifier.


       This property is **required**.

       See :ref:`zephyr:dt-important-props` for more information.

   * - ``zephyr,gain``
     - ``string``
     - .. code-block:: none

          Gain selection:
          - ADC_GAIN_1_6: x 1/6
          - ADC_GAIN_1_5: x 1/5
          - ADC_GAIN_1_4: x 1/4
          - ADC_GAIN_2_7: x 2/7
          - ADC_GAIN_1_3: x 1/3
          - ADC_GAIN_2_5: x 2/5
          - ADC_GAIN_1_2: x 1/2
          - ADC_GAIN_2_3: x 2/3
          - ADC_GAIN_4_5: x 4/5
          - ADC_GAIN_1:   x 1
          - ADC_GAIN_2:   x 2
          - ADC_GAIN_3:   x 3
          - ADC_GAIN_4:   x 4
          - ADC_GAIN_6:   x 6
          - ADC_GAIN_8:   x 8
          - ADC_GAIN_12:  x 12
          - ADC_GAIN_16:  x 16
          - ADC_GAIN_24:  x 24
          - ADC_GAIN_32:  x 32
          - ADC_GAIN_64:  x 64
          - ADC_GAIN_128: x 128



       This property is **required**.

       Legal values: ``'ADC_GAIN_1_6'``, ``'ADC_GAIN_1_5'``, ``'ADC_GAIN_1_4'``, ``'ADC_GAIN_2_7'``, ``'ADC_GAIN_1_3'``, ``'ADC_GAIN_2_5'``, ``'ADC_GAIN_1_2'``, ``'ADC_GAIN_2_3'``, ``'ADC_GAIN_4_5'``, ``'ADC_GAIN_1'``, ``'ADC_GAIN_2'``, ``'ADC_GAIN_3'``, ``'ADC_GAIN_4'``, ``'ADC_GAIN_6'``, ``'ADC_GAIN_8'``, ``'ADC_GAIN_12'``, ``'ADC_GAIN_16'``, ``'ADC_GAIN_24'``, ``'ADC_GAIN_32'``, ``'ADC_GAIN_64'``, ``'ADC_GAIN_128'``

   * - ``zephyr,reference``
     - ``string``
     - .. code-block:: none

          Reference selection:
          - ADC_REF_VDD_1:     VDD
          - ADC_REF_VDD_1_2:   VDD/2
          - ADC_REF_VDD_1_3:   VDD/3
          - ADC_REF_VDD_1_4:   VDD/4
          - ADC_REF_INTERNAL:  Internal
          - ADC_REF_EXTERNAL0: External, input 0
          - ADC_REF_EXTERNAL1: External, input 1



       This property is **required**.

       Legal values: ``'ADC_REF_VDD_1'``, ``'ADC_REF_VDD_1_2'``, ``'ADC_REF_VDD_1_3'``, ``'ADC_REF_VDD_1_4'``, ``'ADC_REF_INTERNAL'``, ``'ADC_REF_EXTERNAL0'``, ``'ADC_REF_EXTERNAL1'``

   * - ``zephyr,vref-mv``
     - ``int``
     - .. code-block:: none

          This property can be used to specify the voltage (in millivolts)
          of the reference selected for this channel, so that applications
          can get that value if needed for some calculations.
          For the internal reference, the voltage can be usually obtained with
          a dedicated ADC API call, so there is no need to use this property
          in that case, but for other references this property can be useful.



   * - ``zephyr,acquisition-time``
     - ``int``
     - .. code-block:: none

          Acquisition time.
          Use the ADC_ACQ_TIME macro to compose the value for this property
          or pass ADC_ACQ_TIME_DEFAULT to use the default setting for a given
          hardware (e.g. when the hardware does not allow to configure the
          acquisition time).



       This property is **required**.

   * - ``zephyr,differential``
     - ``boolean``
     - .. code-block:: none

          When set, selects differential input mode for the channel. Otherwise,
          single-ended mode is used unless the zephyr,input-negative property is
          specified, in which case the differential mode is selected implicitly.



   * - ``zephyr,input-positive``
     - ``int``
     - .. code-block:: none

          Positive ADC input. Used only for drivers that select
          the ADC_CONFIGURABLE_INPUTS Kconfig option.



   * - ``zephyr,input-negative``
     - ``int``
     - .. code-block:: none

          Negative ADC input. Used only for drivers that select
          the ADC_CONFIGURABLE_INPUTS Kconfig option.
          When specified, implies the differential input mode for the channel.



   * - ``zephyr,resolution``
     - ``int``
     - .. code-block:: none

          ADC resolution to be used for the channel.



   * - ``zephyr,oversampling``
     - ``int``
     - .. code-block:: none

          Oversampling setting to be used for the channel.
          When specified, each sample is averaged from 2^N conversion results
          (where N is the provided value).



   * - ``zephyr,current-source-pin``
     - ``uint8-array``
     - .. code-block:: none

          Output pin selection for the current sources. The actual
          interpretation depends on the driver. This is used only for drivers
          which select the ADC_CONFIGURABLE_EXCITATION_CURRENT_SOURCE_PIN
          Kconfig option.



   * - ``zephyr,vbias-pins``
     - ``int``
     - .. code-block:: none

          Output pin selection for the bias voltage. The actual interpretation
          depends on the driver. This is used only for drivers which select
          the ADC_CONFIGURABLE_VBIAS_PIN Kconfig option.



Specifier cell names
********************

- io-channel cells: input