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drivers: dma: esp32: added support for multiple descriptors
Previously, configuring the GDMA was limited to a single descriptor, restricting memory transfers to a maximum of 4kB. This update introduces support for multiple descriptors, enabling users to define multiple dma_blocks. The maximum number of descriptors can be configured via the CONFIG_DMA_ESP32_DESCRIPTOR_NUM option. Additionally, the dma_get_status() function now reports the index of the currently processed descriptor through the status.read_position and status.write_position fields. Signed-off-by: Armin Kessler <[email protected]>
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