espressif,esp32-gdma
Vendor: Espressif Systems
Note
An implementation of a driver matching this compatible is available in drivers/dma/dma_esp32_gdma.c.
Description
These nodes are “dma” bus nodes.
Espressif's GDMA (General Direct Memory Access) Node
General Direct Memory Access (GDMA) is a feature that allows
peripheral-to-memory, memory-to-peripheral, and memory-to-memory
data transfer at a high speed.
The GDMA controller in ESP32-C3 has six independent channels,
three transmit channels and three receive channels.
Every channel can be connected to different peripherals.
ESP32C3's Peripherals with GDMA:
* SPI2
* UHCI0 (UART0/UART1)
* I2S (Not Supported yet)
* AES (Not Supported yet)
* SHA (Not Supported yet)
* ADC
The GDMA controller in ESP32-S3 has ten independent channels,
five transmit channels and five receive channels. Only six are
supported, meaning three transmit and three receive channels.
ESP32S3's Peripherals with GDMA:
* SPI2
* SPI3
* UHCI0
* I2S0 (Not Supported yet)
* I2S1 (Not Supported yet)
* LCD/CAM (Not Supported yet)
* AES (Not Supported yet)
* SHA (Not Supported yet)
* ADC (Not Supported yet)
* RMT (Not Supported yet)
Properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
|---|---|---|
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Number of items to expect in a DMA specifier
This property is required. Constant value: |
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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.
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Number of DMA channels supported by the controller
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Number of DMA request signals supported by the controller.
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Memory address alignment requirement for DMA buffers used by the controller.
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Memory size alignment requirement for DMA buffers used by the controller.
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Minimal chunk of data possible to be copied by the controller.
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Deprecated properties not inherited from the base binding file.
(None)
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 “espressif,esp32-gdma” compatible.
Name |
Type |
Details |
|---|---|---|
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indicates the operational status of a device
Legal values: See Important properties for more information. |
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compatible strings
This property is required. See Important properties for more information. |
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register space
See Important properties for more information. |
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name of each register space
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interrupts for device
See Important properties for more information. |
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extended interrupt specifier for device
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name of each interrupt
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phandle to interrupt controller node
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Human readable string describing the device (used as device_get_binding() argument)
See Important properties for more information. This property is deprecated. |
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Clock gate information
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name of each clock
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number of address cells in reg property
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number of size cells in reg property
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DMA channels specifiers
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Provided names of DMA channel specifiers
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IO channels specifiers
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Provided names of IO channel specifiers
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mailbox / IPM channels specifiers
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Provided names of mailbox / IPM channel specifiers
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Power domain specifiers
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Provided names of power domain specifiers
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Number of cells in power-domains property
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Do not initialize device automatically on boot. Device should be manually
initialized using device_init().
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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.
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Automatically configure the device for runtime power management after the
init function runs.
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List of power states that will disable this device power.
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Specifier cell names
dma cells: channel