Lattice iCE40 FPGA 바인딩

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.. dtcompatible:: lattice,ice40-fpga
.. _dtbinding_lattice_ice40_fpga:

lattice,ice40-fpga (on spi bus)
###############################

Vendor: :ref:`Lattice Semiconductor <dt_vendor_lattice>`

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



.. code-block:: none

   Lattice iCE40 FPGA

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

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

                GPIO specifier that controls power to the device.

                This property should be provided when the device has a dedicated
                switch that controls power to the device.  The supply state is
                entirely the responsibility of the device driver.

                Contrast with vin-supply.



         * - ``vin-supply``
           - ``phandle``
           - .. code-block:: none

                Reference to the regulator that controls power to the device.
                The referenced devicetree node must have a regulator compatible.

                This property should be provided when device power is supplied
                by a shared regulator.  The supply state is dependent on the
                request status of all devices fed by the regulator.

                Contrast with supply-gpios.  If both properties are provided
                then the regulator must be requested before the supply GPIOS is
                set to an active state, and the supply GPIOS must be set to an
                inactive state before releasing the regulator.



         * - ``spi-max-frequency``
           - ``int``
           - .. code-block:: none

                Maximum clock frequency of device's SPI interface in Hz


             This property is **required**.

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

                Duplex mode, full or half. By default it's always full duplex thus 0
                as this is, by far, the most common mode.
                Use the macros not the actual enum value, here is the concordance
                list (see dt-bindings/spi/spi.h)
                  0    SPI_FULL_DUPLEX
                  2048 SPI_HALF_DUPLEX



             Legal values: ``0``, ``2048``

         * - ``frame-format``
           - ``int``
           - .. code-block:: none

                Motorola or TI frame format. By default it's always Motorola's,
                thus 0 as this is, by far, the most common format.
                Use the macros not the actual enum value, here is the concordance
                list (see dt-bindings/spi/spi.h)
                  0     SPI_FRAME_FORMAT_MOTOROLA
                  32768 SPI_FRAME_FORMAT_TI



             Legal values: ``0``, ``32768``

         * - ``spi-cpol``
           - ``boolean``
           - .. code-block:: none

                SPI clock polarity which indicates the clock idle state.
                If it is used, the clock idle state is logic high; otherwise, low.



         * - ``spi-cpha``
           - ``boolean``
           - .. code-block:: none

                SPI clock phase that indicates on which edge data is sampled.
                If it is used, data is sampled on the second edge; otherwise, on the first edge.



         * - ``spi-hold-cs``
           - ``boolean``
           - .. code-block:: none

                In some cases, it is necessary for the master to manage SPI chip select
                under software control, so that multiple spi transactions can be performed
                without releasing it. A typical use case is variable length SPI packets
                where the first spi transaction reads the length and the second spi transaction
                reads length bytes.



         * - ``load-mode``
           - ``int``
           - .. code-block:: none

                Configure the method used to load the bitstream.
                The bitstream may be loaded via 2 separate methods:
                0 := load the FPGA via SPI transfer
                1 := load the FPGA via bit-banged GPIO
                Option 0 may be suitable for some high-end microcontrollers.
                Option 1 is suitable for low-end microcontrollers. This option
                requires clk-gpios, pico-gpios, gpios-set-reg, and gpios-clear-reg
                to be defined.
                Example usage:
                load-mode = <0>;



             This property is **required**.

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

                Configuration Done output from iCE40.
                Example usage:
                cdone-gpios = <&gpio0 0 0>;



             This property is **required**.

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

                Configuration Reset input on iCE40.
                Example usage:
                creset-gpios = <&gpio0 1 GPIO_PUSH_PULL);



             This property is **required**.

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

                SPI Clock GPIO input on iCE40.
                Example usage:
                clk-gpios = <&gpio0 5 GPIO_PUSH_PULL>;



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

                Peripheral-In Controller-Out GPIO input on iCE40.
                Example usage:
                pico-gpios = <&gpio0 7 GPIO_PUSH_PULL>;



         * - ``gpios-set-reg``
           - ``int``
           - .. code-block:: none

                Register address for setting a GPIO.
                Example usage:
                gpios-set-reg = <0x60004008>;



         * - ``gpios-clear-reg``
           - ``int``
           - .. code-block:: none

                Register address for clearing a GPIO.
                Example usage:
                gpios-clear-reg = <0x6000400c>;



         * - ``mhz-delay-count``
           - ``int``
           - .. code-block:: none

                in order to create a 1 MHz square wave in the following
                process.
                while(true) {
                  *gpios_set_reg |= BIT(n);
                  for(int i = mhz_delay_count; i > 0; --i);
                  *gpios_clear_reg |= BIT(n);
                  for(int i = mhz_delay_count; i > 0; --i);
                }
                Example usage / default:
                mhz-delay-count = <0>;



         * - ``creset-delay-us``
           - ``int``
           - .. code-block:: none

                Delay (in microseconds) between asserting CRESET_B and releasing CRESET_B.
                Example usage / default:
                creset-delay-us = <1>;



         * - ``config-delay-us``
           - ``int``
           - .. code-block:: none

                Delay (in microseconds) after releasing CRESET_B to clear internal configuration memory.
                Example usage / default:
                config-delay-us = <1200>;



         * - ``leading-clocks``
           - ``int``
           - .. code-block:: none

                Prior to sending the bitstream, issue this number of leading clocks with SPI_CS pulled high.
                Example usage / default:
                leading-clocks = <8>;



         * - ``trailing-clocks``
           - ``int``
           - .. code-block:: none

                After sending the bitstream, issue this number of trailing clocks with SPI_CS pulled high.
                Example usage / default:
                trailing-clocks = <49>;





   .. 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 "lattice,ice40-fpga" 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


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

                number of size cells in reg property


         * - ``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().