On Thu, 24 Jun 2021 11:39:58 +0200, 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, this new bindings allow to select this alternative protocol in > device tree, especially for STM32 USART/UART nodes. > > Signed-off-by: Amelie Delaunay <amelie.delaunay@xxxxxxxxxxx> > --- > Documentation/devicetree/bindings/dma/st,stm32-dma.yaml | 7 +++++++ > 1 file changed, 7 insertions(+) > Acked-by: Rob Herring <robh@xxxxxxxxxx>
