Espressif ESP32 SPI 바인딩

:orphan:

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.. dtcompatible:: espressif,esp32-spi
.. _dtbinding_espressif_esp32_spi:

espressif,esp32-spi
###################

Vendor: :ref:`Espressif Systems <dt_vendor_espressif>`

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

These nodes are "spi" bus nodes.

.. code-block:: none

   ESP32 SPI

Properties
**********

.. 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

         * - ``clock-frequency``
           - ``int``
           - .. code-block:: none

                Clock frequency the SPI peripheral is being driven at, in Hz.



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

                An array of chip select GPIOs to use. Each element
                in the array specifies a GPIO. The index in the array
                corresponds to the child node that the CS gpio controls.

                Example:

                  spi@... {
                          cs-gpios = <&gpio0 23 GPIO_ACTIVE_LOW>,
                                        <&gpio1 10 GPIO_ACTIVE_LOW>,
                                        ...;

                          spi-device@0 {
                                  reg = <0>;
                                  ...
                          };
                          spi-device@1 {
                                  reg = <1>;
                                  ...
                          };
                          ...
                  };

                The child node "spi-device@0" specifies a SPI device with
                chip select controller gpio0, pin 23, and devicetree
                GPIO flags GPIO_ACTIVE_LOW. Similarly, "spi-device@1" has CS GPIO
                controller gpio1, pin 10, and flags GPIO_ACTIVE_LOW. Additional
                devices can be configured in the same way.

                If unsure about the flags cell, GPIO_ACTIVE_LOW is generally a safe
                choice for a typical "CSn" pin. GPIO_ACTIVE_HIGH may be used if
                intervening hardware inverts the signal to the peripheral device or
                the line itself is active high.

                If this property is not defined, no chip select GPIOs are set.
                SPI controllers with dedicated CS pins do not need to define
                the cs-gpios property.



         * - ``pinctrl-0``
           - ``phandles``
           - .. code-block:: none

                Pin configuration/s for the first state. Content is specific to the
                selected pin controller driver implementation.



             This property is **required**.

         * - ``pinctrl-1``
           - ``phandles``
           - .. code-block:: none

                Pin configuration/s for the second state. See pinctrl-0.



         * - ``pinctrl-2``
           - ``phandles``
           - .. code-block:: none

                Pin configuration/s for the third state. See pinctrl-0.



         * - ``pinctrl-3``
           - ``phandles``
           - .. code-block:: none

                Pin configuration/s for the fourth state. See pinctrl-0.



         * - ``pinctrl-4``
           - ``phandles``
           - .. code-block:: none

                Pin configuration/s for the fifth state. See pinctrl-0.



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

                Names for the provided states. The number of names needs to match the
                number of states.



             This property is **required**.

         * - ``half-duplex``
           - ``boolean``
           - .. code-block:: none

                Enable half-duplex communication mode.

                Transmit data before receiving it, instead of simultaneously



         * - ``dummy-comp``
           - ``boolean``
           - .. code-block:: none

                Enable dummy SPI compensation cycles


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

                Enable 3-wire mode

                Use MOSI for both sending and receiving data



         * - ``dma-enabled``
           - ``boolean``
           - .. code-block:: none

                Enable SPI DMA support


         * - ``dma-clk``
           - ``int``
           - .. code-block:: none

                DMA clock source


         * - ``dma-host``
           - ``int``
           - .. code-block:: none

                DMA Host - 0 -> SPI2, 1 -> SPI3


         * - ``clk-as-cs``
           - ``boolean``
           - .. code-block:: none

                Support to toggle the CS while the clock toggles

                Output clock on CS line if CS is active



         * - ``positive-cs``
           - ``boolean``
           - .. code-block:: none

                Make CS positive during a transaction instead of negative


         * - ``use-iomux``
           - ``boolean``
           - .. code-block:: none

                Some pins are allowed to bypass the GPIO Matrix and use the IO_MUX
                routing mechanism instead, this avoids extra routing latency and makes
                possible the use of operating frequencies higher than 20 MHz.

                Refer to SoC's Technical Reference Manual to check which pins are
                allowed to use this routing path.



         * - ``cs-setup-time``
           - ``int``
           - .. code-block:: none

                Chip select setup time setting, see TRF for SOC for details of
                timing applied.



         * - ``cs-hold-time``
           - ``int``
           - .. code-block:: none

                Chip select hold time setting, see TRF for SOC for details of
                timing applied.



         * - ``line-idle-low``
           - ``boolean``
           - .. code-block:: none

                Default MISO and MOSI pins GPIO level when idle. Defaults to high by default.





   .. 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 "espressif,esp32-spi" compatible.

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

         * - Name
           - Type
           - Details

         * - ``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.



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

                List of power states that will disable this device power.



         * - ``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


             This property is **required**.

             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


         * - ``#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**.

         * - ``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


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

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