:orphan:

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.. dtcompatible:: rohm,bd8lb600fs-gpio
.. _dtbinding_rohm_bd8lb600fs_gpio:

rohm,bd8lb600fs-gpio (on bd8lb600fs bus)
########################################

Vendor: :ref:`ROHM Semiconductor Co., Ltd <dt_vendor_rohm>`

.. note::

   An implementation of a driver matching this compatible is available in
   :zephyr_file:`drivers/gpio/gpio_bd8lb600fs.c`.

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



.. code-block:: none

   This is a representation of the Rohm BD8LB600FS SPI Gpio Expander.
   Multiple instances may be daisy chained, which can be configured
   via the number of supported GPIOs.

Properties
**********

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


These property descriptions apply to "rohm,bd8lb600fs-gpio"
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

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

                Number of items to expect in a GPIO specifier


             This property is **required**.

             Constant value: ``2``

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

                Number of pins for the expander. This must be a multiple of 8.
                The number of pins also defines how many devices are daisy chained.
                Set to 8 for one instance without daisy chaining.



             This property is **required**.

             Default value: ``32``

             Legal values: ``8``, ``16``, ``24``, ``32``

         * - ``gpio-controller``
           - ``boolean``
           - .. code-block:: none

                Convey's this node is a GPIO controller


             This property is **required**.

         * - ``gpio-reserved-ranges``
           - ``array``
           - .. code-block:: none

                If not all the GPIOs at offsets 0...N-1 are usable for ngpios = <N>, then
                this property contains an additional set of tuples which specify which GPIOs
                are unusable. This property indicates the start and size of the GPIOs
                that can't be used.

                For example, setting "gpio-reserved-ranges = <3 2>, <10 1>;" means that
                GPIO offsets 3, 4, and 10 are not usable, even if ngpios = <18>.



         * - ``gpio-line-names``
           - ``string-array``
           - .. code-block:: none

                This is an array of strings defining the names of the GPIO lines
                going out of the GPIO controller





   .. 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 "rohm,bd8lb600fs-gpio" compatible.

      (None)


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

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

   * - Name
     - Type
     - Details

   * - ``gpio-hog``
     - ``boolean``
     - .. code-block:: none

          Conveys this node is a GPIO hog.



       This property is **required**.

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

          This is an array of GPIO specifiers (e.g. pin, flags) to be hogged. The number of array
          entries must be an integer multiple of the number of GPIO specifier cells for the parent
          GPIO controller.



       This property is **required**.

   * - ``input``
     - ``boolean``
     - .. code-block:: none

          If this property is set, the GPIO is configured as an input. This property takes
          precedence over the output-low and output-high properties.



   * - ``output-low``
     - ``boolean``
     - .. code-block:: none

          If this property is set, the GPIO is configured as an output set to logical low. This
          property takes precedence over the output-high property.



   * - ``output-high``
     - ``boolean``
     - .. code-block:: none

          If this property is set, the GPIO is configured as an output set to logical high.



   * - ``line-name``
     - ``string``
     - .. code-block:: none

          Optional GPIO line name.



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

- gpio cells: pin, flags