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.. dtcompatible:: infineon,xmc4xxx-pinctrl
.. _dtbinding_infineon_xmc4xxx_pinctrl:

infineon,xmc4xxx-pinctrl
########################

Vendor: :ref:`Infineon Technologies <dt_vendor_infineon>`

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



.. code-block:: none

   The Infineon XMC4XXX pin controller is responsible for connecting peripheral outputs
   to specific port/pins (also known as alternate functions) and configures pin properties.

   The pinctrl settings are referenced in a device tree peripheral node. For example in a UART
   node:

   &usic1ch1 {
       compatible = "infineon,xmc4xxx-uart";
       pinctrl-0 = <&uart_tx_p0_1_u1c1 &uart_rx_p0_0_u1c1>;
       pinctrl-names = "default";
       input-src = "DX0D";
       ...
   };

   pinctrl-0 is the phandle that stores the pin settings for two pins: &uart_tx_p0_1_u1c1
   and &uart_rx_p0_0_u1c1. These nodes are pre-defined and their naming convention is designed
   to help the user select the correct pin settings. Note the use of peripheral type,
   pin direction, port/pin number and USIC in the name.

   The pre-defined nodes only set the alternate function of the output pin. The
   configuration for the pin (i.e. drive strength) should be set in the board setup.
   The set of possible configurations are defined in the properties section below (in addition
   to the inherited property-allowlist list from pincfg-node.yaml).

   To create a new pin configuration, the user may append to the &pinctrl node, for example

   #include <zephyr/dt-bindings/pinctrl/xmc4xxx-pinctrl.h>
   &pinctrl {
       my_node_config: my_node_config {
       pinmux = <XMC4XXX_PINMUX_SET(0, 1, 2)>;
       drive-push-pull;
         ... other supported pin configurations ..
   };
   where XMC4XXX_PINMUX_SET(PORT, PIN, ALTERNATE_FUNCTION) is a helper macro for setting the
   alternate function for a given port/pin. Setting ALTERNATE_FUNCTION = 0 means that no
   alternate function is selected.

   The pinctrl driver only sets the alternate function for output pins. The input mux is
   handled by the peripheral drivers. For example the &usic1ch1 node has input-src property for
   this purpose. There are no pre-defined nodes for the input mux and this must be properly set
   by the user. Refer to the peripheral .yaml file (i.e. infineon,xmc4xxx-uart.yaml) and
   XMC4XXX documentation.

Properties
**********

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


These property descriptions apply to "infineon,xmc4xxx-pinctrl"
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.

      (None)

   .. 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 "infineon,xmc4xxx-pinctrl" compatible.

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

         * - Name
           - Type
           - Details

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

                number of address cells in reg property


             This property is **required**.

             Constant value: ``1``

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

                number of size cells in reg property


             This property is **required**.

             Constant value: ``1``

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

                indicates the operational status of a device


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

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

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

                compatible strings


             This property is **required**.

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

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

                register space


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

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

                name of each register space


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

                interrupts for device


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

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

                extended interrupt specifier for device


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

                name of each interrupt


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

                phandle to interrupt controller node


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

                Human readable string describing the device (used as device_get_binding() argument)



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

             This property is **deprecated**.

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

                Clock gate information


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

                name of each clock


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

                DMA channels specifiers


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

                Provided names of DMA channel specifiers


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

                IO channels specifiers


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

                Provided names of IO channel specifiers


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

                mailbox / IPM channels specifiers


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

                Provided names of mailbox / IPM channel specifiers


         * - ``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.



         * - ``power-domain``
           - ``phandle``
           - .. code-block:: none


                Power domain the device belongs to.

                The device will be notified when the power domain it belongs to is either
                suspended or resumed.



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

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






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

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

   * - Name
     - Type
     - Details

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

          Encodes port/pin and alternate function. See helper macro XMC4XX_PINMUX_SET().
          Alternate function is only set for output pins; It selects  ALT1-ALT4
          output line in the GPIO element. The alternate function for input pins is
          handled separately by the peripheral. It is upto the peripheral to configure which
          input pin to use (For example see parameter input-src in infineon,xmc4xxx-uart.yaml).



       This property is **required**.

   * - ``drive-strength``
     - ``string``
     - .. code-block:: none

          Drive strength of the output pin. Following options as in XMC_GPIO_OUTPUT_STRENGTH
          See xmc4_gpio.h. This only has an effect if the pin is in drive-push-pull mode.



       This property is **required**.

       Legal values: ``'strong-sharp-edge'``, ``'strong-medium-edge'``, ``'strong-soft-edge'``, ``'strong-slow-edge'``, ``'medium'``, ``'medium-unknown1-edge'``, ``'medium-unknown2-edge'``, ``'weak'``

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

          Inverts the input.


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

          Pre-assigns hardware control of the pin to a certain peripheral.


       This property is **required**.

       Legal values: ``'disabled'``, ``'periph1'``, ``'periph2'``

   * - ``bias-pull-up``
     - ``boolean``
     - .. code-block:: none

          enable pull-up resistor


   * - ``bias-pull-down``
     - ``boolean``
     - .. code-block:: none

          enable pull-down resistor


   * - ``drive-push-pull``
     - ``boolean``
     - .. code-block:: none

          drive actively high and low


   * - ``drive-open-drain``
     - ``boolean``
     - .. code-block:: none

          drive with open drain (hardware AND)


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

          set the pin to output mode with low level


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

          set the pin to output mode with high level