:orphan:
.. raw:: html
.. dtcompatible:: st,stm32wb-rcc
.. _dtbinding_st_stm32wb_rcc:
st,stm32wb-rcc
##############
Vendor: :ref:`STMicroelectronics `
Description
***********
.. code-block:: none
STM32WB Reset and Clock controller node.
For more description confere st,stm32-rcc.yaml
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
* - ``cpu1-prescaler``
- ``int``
- .. code-block:: none
CPU1 prescaler. Sets a HCLK1 frequency (Core frequency)
lower than SYSCLK frequency.
The HCLK1 clocks CPU1, AHB1, AHB2, AHB3 and SRAM1.
This property is **required**.
Legal values: ``1``, ``2``, ``3``, ``4``, ``5``, ``6``, ``8``, ``10``, ``16``, ``32``, ``64``, ``128``, ``256``, ``512``
* - ``cpu2-prescaler``
- ``int``
- .. code-block:: none
CPU2 prescaler. Sets HCLK2 frequency which clocks CPU2.
(A.K.A C2HPRE)
This property is **required**.
Legal values: ``1``, ``2``, ``4``, ``8``, ``16``, ``32``, ``64``, ``128``, ``256``, ``512``
* - ``ahb4-prescaler``
- ``int``
- .. code-block:: none
HCLK4 shared prescaler (AHB4, Flash memory and SRAM2).
(A.K.A SHDHPRE)
This property is **required**.
Legal values: ``1``, ``2``, ``4``, ``8``, ``16``, ``32``, ``64``, ``128``, ``256``, ``512``
* - ``#clock-cells``
- ``int``
- .. code-block:: none
Number of items to expect in a Clock specifier
This property is **required**.
Constant value: ``2``
* - ``clock-frequency``
- ``int``
- .. code-block:: none
default frequency in Hz for clock output
This property is **required**.
* - ``apb1-prescaler``
- ``int``
- This property is **required**.
Legal values: ``1``, ``2``, ``4``, ``8``, ``16``
* - ``apb2-prescaler``
- ``int``
- This property is **required**.
Legal values: ``1``, ``2``, ``4``, ``8``, ``16``
* - ``undershoot-prevention``
- ``boolean``
- .. code-block:: none
On some parts, it could be required to set up highest core frequencies
(>80MHz) in two steps in order to prevent undershoot.
This is done by applying an intermediate AHB prescaler before switching
System Clock source to PLL. Once done, prescaler is set back to expected
value.
.. 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,stm32wb-rcc" compatible.
.. list-table::
:widths: 1 1 4
:header-rows: 1
* - Name
- Type
- Details
* - ``reg``
- ``array``
- .. code-block:: none
register space
This property is **required**.
See :ref:`dt-important-props` for more information.
* - ``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-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
* - ``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.
Specifier cell names
********************
- clock cells: bus, bits