:orphan:
.. raw:: html
.. dtcompatible:: nxp,mcux-edma
.. _dtbinding_nxp_mcux_edma:
nxp,mcux-edma
#############
Vendor: :ref:`NXP Semiconductors N.V. `
.. note::
An implementation of a driver matching this compatible is available in
:zephyr_file:`drivers/dma/dma_mcux_edma.c`.
Description
***********
These nodes are "dma" bus nodes.
.. code-block:: none
NXP MCUX EDMA controller
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
* - ``dma-channels``
- ``int``
- .. code-block:: none
Number of DMA channels supported by the controller
This property is **required**.
* - ``dma-requests``
- ``int``
- .. code-block:: none
Number of DMA request signals supported by the controller.
This property is **required**.
* - ``dmamux-reg-offset``
- ``int``
- .. code-block:: none
The offset value for obtaining DMAMUX register index from DMAMUX channel. Default value means DMAMUX channel is identical with DMAMUX register index
* - ``channel-gap``
- ``array``
- .. code-block:: none
On some platforms, there may be a gap in the channels and
this array specifies the start and end of a single gap
* - ``nxp,mem2mem``
- ``boolean``
- .. code-block:: none
If the DMA controller supports memory to memory transfer
* - ``nxp,a_on``
- ``boolean``
- .. code-block:: none
If the DMA controller supports always on
* - ``irq-shared-offset``
- ``int``
- .. code-block:: none
Describes an offset between two channels share the same interrupt entry.
Default value means each channel has separate interrupt entry.
* - ``no-error-irq``
- ``boolean``
- .. code-block:: none
If the SoCs don't have a separate interrupt id for error IRQ.
* - ``nxp,version``
- ``int``
- .. code-block:: none
eDMA IP revision number.
Legal values: ``2``, ``3``, ``4``
* - ``channels-shared-irq-mask``
- ``array``
- .. code-block:: none
Describes channel enabled mask value on every IRQ.
The channel number is mapped to the bit value of array element value.
If the interrupt is shared on one channel number, the correspongding
bit is set to 1.
Please note each element of the array must be 32-bit. If there are more
than 32 channels, add one or more 32-bit elements in array(elements
should be contiguous). The software will determine the mask value of
several elements corresponding to the same interrupt according to the
number of channels.
* - ``#dma-cells``
- ``int``
- .. code-block:: none
Number of items to expect in a DMAMUX specifier
This property is **required**.
* - ``dma-channel-mask``
- ``int``
- .. code-block:: none
Bitmask of available DMA channels in ascending order that are
not reserved by firmware and are available to the
kernel. i.e. first channel corresponds to LSB.
* - ``dma-buf-addr-alignment``
- ``int``
- .. code-block:: none
Memory address alignment requirement for DMA buffers used by the controller.
* - ``dma-buf-size-alignment``
- ``int``
- .. code-block:: none
Memory size alignment requirement for DMA buffers used by the controller.
* - ``dma-copy-alignment``
- ``int``
- .. code-block:: none
Minimal chunk of data possible to be copied by the controller.
.. 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 "nxp,mcux-edma" compatible.
.. list-table::
:widths: 1 1 4
:header-rows: 1
* - Name
- Type
- Details
* - ``reg``
- ``array``
- .. code-block:: none
Specifies base physical address(s) and size of DMA and respective DMAMUX register(s)
that routes DMA sources
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.
This property is **required**.
See :ref:`zephyr:dt-important-props` for more information.
* - ``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: ``'ok'``, ``'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.
* - ``reg-names``
- ``string-array``
- .. code-block:: none
Optional names given to each register block in the "reg" property.
For example:
/ {
soc {
#address-cells = <1>;
#size-cells = <1>;
uart@1000 {
reg = <0x1000 0x2000>, <0x3000 0x4000>;
reg-names = "foo", "bar";
};
};
};
The uart@1000 node has two register blocks:
- one with base address 0x1000, size 0x2000, and name "foo"
- another with base address 0x3000, size 0x4000, and name "bar"
* - ``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 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 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
* - ``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.
Specifier cell names
********************
- dma cells: mux, source