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nxp,edma

Note

An implementation of a driver matching this compatible is available in drivers/dma.

Description

These nodes are “dma” bus nodes.

NXP enhanced Direct Memory Access (eDMA) node

Properties

Properties not inherited from the base binding file.

Name	Type	Details
`valid-channels`	`array`	Use this property to specify which channel indexes are to be considered valid. The difference between this property and "dma-channels" is the fact that this property allows you to have "gaps" between the channel indexes. This is useful in cases where you know you're not going to be using all of the possible channels, thus leading to a more readable DTS. Of course, this property and "dma-channels" are mutually exclusive, meaning you can't specify both properties as this will lead to a BUILD_ASSERT() failure.
`hal-cfg-index`	`int`	Use this property to specify which HAL configuration should be used. In the case of some SoCs (e.g: i.MX93), there can be multiple eDMA variants, each of them having different configurations (e.g: i.MX93 eDMA3 has 31 channels, i.MX93 eDMA4 has 64 channels and both of them have slightly different register layouts). To overcome this issue, the HAL exposes an array of configurations called "edma_hal_configs". To perform various operations, the HAL uses an eDMA configuration which will tell it what register layout the IP has, the number of channels, various flags and offsets. As such, if there's multiple configurations available, the user will have to specify which configuration to use through this property. If missing, the configuration found at index 0 will be used.
`#dma-cells`	`int`	Number of items to expect in a DMA specifier This property is required. Constant value: `2`
`dma-channel-mask`	`int`	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-channels`	`int`	Number of DMA channels supported by the controller
`dma-requests`	`int`	Number of DMA request signals supported by the controller.
`dma-buf-addr-alignment`	`int`	Memory address alignment requirement for DMA buffers used by the controller.
`dma-buf-size-alignment`	`int`	Memory size alignment requirement for DMA buffers used by the controller.
`dma-copy-alignment`	`int`	Minimal chunk of data possible to be copied by the controller.

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,edma” compatible.

Name	Type	Details
`reg`	`array`	register space This property is required. See Important properties for more information.
`status`	`string`	indicates the operational status of a device Legal values: `'ok'`, `'okay'`, `'disabled'`, `'reserved'`, `'fail'`, `'fail-sss'` See Important properties for more information.
`compatible`	`string-array`	compatible strings This property is required. See Important properties for more information.
`reg-names`	`string-array`	name of each register space
`interrupts`	`array`	interrupts for device See Important properties for more information.
`interrupts-extended`	`compound`	extended interrupt specifier for device
`interrupt-names`	`string-array`	name of each interrupt
`interrupt-parent`	`phandle`	phandle to interrupt controller node
`label`	`string`	Human readable string describing the device (used as device_get_binding() argument) See Important properties for more information. This property is deprecated.
`clocks`	`phandle-array`	Clock gate information
`clock-names`	`string-array`	name of each clock
`#address-cells`	`int`	number of address cells in reg property
`#size-cells`	`int`	number of size cells in reg property
`dmas`	`phandle-array`	DMA channels specifiers
`dma-names`	`string-array`	Provided names of DMA channel specifiers
`io-channels`	`phandle-array`	IO channels specifiers
`io-channel-names`	`string-array`	Provided names of IO channel specifiers
`mboxes`	`phandle-array`	mailbox / IPM channels specifiers
`mbox-names`	`string-array`	Provided names of mailbox / IPM channel specifiers
`power-domains`	`phandle-array`	Power domain specifiers
`power-domain-names`	`string-array`	Provided names of power domain specifiers
`#power-domain-cells`	`int`	Number of cells in power-domains property
`zephyr,deferred-init`	`boolean`	Do not initialize device automatically on boot. Device should be manually initialized using device_init().
`wakeup-source`	`boolean`	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`	Automatically configure the device for runtime power management after the init function runs.
`zephyr,disabling-power-states`	`phandles`	List of power states that will disable this device power.

Specifier cell names

dma cells: channel, mux