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.. dtcompatible:: st,stm32l0-pll-clock
.. _dtbinding_st_stm32l0_pll_clock:

st,stm32l0-pll-clock
####################

Vendor: :ref:`STMicroelectronics <dt_vendor_st>`

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



.. code-block:: none

   STM32L0 and STM32L1 Main PLL node binding:

   Takes one of clk_hse, clk_hsi or clk_msi as input clock, with an
   input frequency from 2 to 24 MHz.

   The desired PLL frequency can be computed with the following formula:

     f(PLL) = f(VCO clock) / PLLDIV  --> PLLCLK (System Clock)

       with f(VCO clock) = f(PLL clock input) × PLLMUL --> PLLVCO

   The PLL output frequency must not exceed 32 MHz.

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-cells``
           - ``int``
           - .. code-block:: none

                Number of items to expect in a Clock specifier


             This property is **required**.

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

                PLL output division



             This property is **required**.

             Legal values: ``2``, ``3``, ``4``

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

                PLL multiplication factor for VCO
                The PLL VCO clock frequency must not exceed:
                - 96 MHz when the product is in Range 1
                - 48 MHz when the product is in Range 2
                - 24 MHz when the product is in Range 3
                If the USB uses the PLL as clock source, the PLL VCO clock must be
                programmed to output a 96 MHz frequency (USBCLK = PLLVCO/2).



             This property is **required**.

             Legal values: ``3``, ``4``, ``6``, ``8``, ``12``, ``16``, ``24``, ``32``, ``48``



   .. 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 "st,stm32l0-pll-clock" compatible.

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

         * - Name
           - Type
           - Details

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

                Clock gate information


             This property is **required**.

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

                indicates the operational status of a device


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

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

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

                compatible strings


             This property is **required**.

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

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

                register space


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