[TI cc23x0 SoC] Add DMA mode to UART driver #90586
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Two DMA channels are assigned to TX and RX respectively: - A TX DMA request is asserted when there is space in the FIFO. - A RX DMA request is asserted when data is in the FIFO. When DMA is enabled for a peripheral, the DMA transfer completion is signaled on the peripheral's interrupt only (here UART's interrupt). It is not signaled on the DMA dedicated interrupt. Also, when DMA is enabled for a peripheral, the DMA controller stops the normal transfer interrupts for this peripheral from reaching the NVIC (the interrupts are still reported in the interrupt registers of the peripheral). Thus, when a large amount of data is transferred using DMA, instead of receiving multiple interrupts from the peripheral as data flows, the NVIC receives only one interrupt when the transfer completes (unmasked peripheral error interrupts continue to be sent to the NVIC). Signed-off-by: Julien Panis <[email protected]>
Add support to use DMA mode with cc23x0 UART module. This consists in specifying the DMA channels and peripherals. Signed-off-by: Julien Panis <[email protected]>
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platform: TI SimpleLink
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@dcpleung @vaishnavachath Could you please review when you have time for this ? |
dcpleung
approved these changes
Jun 6, 2025
vaishnavachath
approved these changes
Jun 10, 2025
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This series adds DMA mode support to UART driver for the TI cc23x0 SoC.
Datasheet: https://www.ti.com/lit/ds/symlink/cc2340r5.pdf