| Message ID | 20210624093959.142265-1-amelie.delaunay@foss.st.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | STM32 DMA alternative REQ/ACK protocol support | expand |
On 24-06-21, 11:39, Amelie Delaunay wrote: > Default REQ/ACK protocol consists in maintaining ACK signal up to the > removal of REQuest and the transfer completion. > In case of alternative REQ/ACK protocol, ACK de-assertion does not wait the > removal of the REQuest, but only the transfer completion. > Due to a possible DMA stream lock when transferring data to/from STM32 > USART/UART, add support to select alternative REQ/ACK protocol. Applied, thanks
Default REQ/ACK protocol consists in maintaining ACK signal up to the removal of REQuest and the transfer completion. In case of alternative REQ/ACK protocol, ACK de-assertion does not wait the removal of the REQuest, but only the transfer completion. Due to a possible DMA stream lock when transferring data to/from STM32 USART/UART, add support to select alternative REQ/ACK protocol. Amelie Delaunay (2): dt-bindings: dma: add alternative REQ/ACK protocol selection in stm32-dma dmaengine: stm32-dma: add alternate REQ/ACK protocol management Documentation/devicetree/bindings/dma/st,stm32-dma.yaml | 7 +++++++ drivers/dma/stm32-dma.c | 8 ++++++-- 2 files changed, 13 insertions(+), 2 deletions(-)