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.. dtcompatible:: atmel,sam-pinctrl
.. _dtbinding_atmel_sam_pinctrl:

atmel,sam-pinctrl
#################

Vendor: :ref:`Atmel Corporation <dt_vendor_atmel>`

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



.. code-block:: none

   Atmel SAM Pinctrl container node

   The Atmel SAM pin controller is a singleton node responsible for controlling
   pin function selection and pin properties. For example, you can use this node
   to route USART0 RX to pin PA10 and enable the pull-up resistor on the pin.

   The node has the 'pinctrl' node label set in your SoC's devicetree, so you can
   modify it like this:

     &pinctrl {
             /* your modifications go here */
     };

   All device pin configurations should be placed in child nodes of the 'pinctrl'
   node, as shown in this example:

     /** You can put this in places like a <board>-pinctrl.dtsi file in
       * your board directory, or a devicetree overlay in your application.
       */

     /** include pre-defined combinations for the SoC variant used by the board */
     #include <dt-bindings/pinctrl/sam4sXc-pinctrl.h>

     &pinctrl {
       /* configuration for the usart0 "default" state */
       usart0_default: usart0_default {
         /* group 1 */
         group1 {
           /* configure PA6 as USART0 TX and PA8 as USART0 CTS */
           pinmux = <PA6A_USART0_TXD0>, <PA8A_USART0_CTS0>;
         };
         /* group 2 */
         group2 {
           /* configure PA5 as USART0 RX and PA7 as USART0 RTS */
           pinmux = <PA5A_USART0_RXD0>, <PA7A_USART0_RTS0>;
           /* both PA5 and PA7 have pull-up enabled */
           bias-pull-up;
         };
       };
     };

   The 'usart0_default' child node encodes the pin configurations for a
   particular state of a device; in this case, the default (that is, active)
   state.

   As shown, pin configurations are organized in groups within each child node.
   Each group can specify a list of pin function selections in the 'pinmux'
   property.

   A group can also specify shared pin properties common to all the specified
   pins, such as the 'bias-pull-up' property in group 2. Here is a list of
   supported standard pin properties:

   - bias-pull-up: Enable pull-up resistor.
   - bias-pull-down: Enable pull-down resistor.
   - drive-open-drain: Open-drain drive mode.

   To link pin configurations with a device, use a pinctrl-N property for some
   number N, like this example you could place in your board's DTS file:

     #include "board-pinctrl.dtsi"

     &usart0 {
           pinctrl-0 = <&usart0_default>;
           pinctrl-names = "default";
     };

Properties
**********

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


These property descriptions apply to "atmel,sam-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 "atmel,sam-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.






Grandchild node properties
==========================

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

   * - Name
     - Type
     - Details

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

          An array of pins sharing the same group properties. The pins should
          be defined using pre-defined macros or, alternatively, using the
          SAM_PINMUX utility macros depending on the pinmux model used by the
          SoC series.



       This property is **required**.

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

          enable pull-up resistor


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

          enable pull-down resistor


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

          drive with open drain (hardware AND)