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.. dtcompatible:: alif,pinctrl
.. _dtbinding_alif_pinctrl:

alif,pinctrl
############

.. sidebar:: Overview

   :Name: ``alif,pinctrl``
   :Vendor: :ref:`Alif Semiconductor <dt_vendor_alif>`
   :Used in: :zephyr:board-catalog:`List of boards <#compatibles=alif,pinctrl>` using
               this compatible
   :Driver: :zephyr_file:`drivers/pinctrl/pinctrl_alif.c`

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



.. code-block:: none

   Alif Semiconductor pin controller

   The Alif pin controller manages pin multiplexing and pad configuration for
   Alif SoCs. Each I/O pin can be assigned to one of up to eight alternate
   functions (peripheral signals). Additionally, pad configuration settings
   control electrical properties such as input enable, drive strength, and
   slew rate.

   I/O pins are organized into ports, with each port containing up to 8 pins.
   Pin multiplexing configurations are specified using predefined macros from
   the SoC-specific pinctrl header (e.g., alif-ensemble-pinctrl.h). These macros
   encode the port, pin number, and alternate function.

   For example, PIN_P0_0__UART0_RX_A represents port 0, pin 0, configured for the
   UART0 RX alternate function.

   Pad configuration is specified using standard pinctrl properties.

   Example:

     #include <dt-bindings/pinctrl/alif-ensemble-pinctrl.h>

     &pinctrl {
       uart4_default: uart4_default {
         group0 {
           pinmux = <PIN_P12_1__UART4_RX_B>;
           input-enable;
         };
         group1 {
           pinmux = <PIN_P12_2__UART4_TX_B>;
         };
       };
     };

   In the example above:
   - "&pinctrl" references the pin controller node defined in the SoC devicetree.
   - "uart4_default" is a user-defined state node that groups all pin configurations
     for UART4's default operating state.
   - "group0" and "group1" are pin group nodes. Pins within a group share the same
     pad configuration properties. The RX pin needs input-enable, while the TX pin
     uses default settings, so they are placed in separate groups.
   - "pinmux = <PIN_P12_1__UART4_RX_B>" specifies the pin function. The macro
     PIN_P12_1__UART4_RX_B selects port 12, pin 1, configured for UART4 RX function.
     These macros are defined in alif-ensemble-pinctrl.h.
   - "input-enable" enables the input buffer for the RX pin. Other pad
     configuration properties are supported as defined in the property-allowlist.

   To link the pin configuration to a device:

     &uart4 {
       pinctrl-0 = <&uart4_default>;
       pinctrl-names = "default";
     };

Properties
**********

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


These property descriptions apply to "alif,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 "alif,pinctrl" compatible.

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

         * - Name
           - Type
           - Details

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

                Pin controller register regions. Two regions are required:
                1. Main pinctrl registers for GPIO ports P0-P14
                2. LPGPIO pinctrl registers for low-power GPIO



             This property is **required**.

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

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

                Names for the register regions:
                - "pinctrl": Main GPIO pin control registers
                - "lpgpio_pinctrl": Low-power GPIO pin control registers



             This property is **required**.

         * - ``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: ``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.

         * - ``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.



         * - ``#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.



         * - ``#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.



         * - ``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



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

                HW spinlock id relevant to the device.



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

                Optional names given to the hwlock specifiers in the "hwlocks" 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.






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

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

   * - Name
     - Type
     - Details

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

          Array of pin function selections. Each element is a 32-bit value
          encoding port, pin, and alternate function using ALIF_PINMUX() or
          predefined macros from alif-ensemble-pinctrl.h (e.g., PIN_P0_0__UART0_RX_A).



       This property is **required**.

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

          Output drive strength in milliamps.
          - 2: 2 mA
          - 4: 4 mA (default)
          - 8: 8 mA
          - 12: 12 mA



       Default value: ``4``

       Legal values: ``2``, ``4``, ``8``, ``12``

   * - ``slew-rate``
     - ``string``
     - .. code-block:: none

          Output slew rate control.
          - slow: Slow slew rate (default)
          - fast: Fast slew rate



       Default value: ``slow``

       Legal values: ``slow``, ``fast``

   * - ``bias-high-impedance``
     - ``boolean``
     - .. code-block:: none

          high impedance mode ("third-state", "floating")


   * - ``bias-bus-hold``
     - ``boolean``
     - .. code-block:: none

          latch weakly


   * - ``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)


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

          enable input on pin (e.g. enable an input buffer, no effect on output)



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

          disable input on pin (e.g. disable an input buffer, no effect on output)



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

          enable schmitt-trigger mode


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

          disable schmitt-trigger mode