Messages in this thread | | | Date | Wed, 14 Jul 2021 13:27:05 -0600 | From | Rob Herring <> | Subject | Re: [PATCH 1/2] dt-bindings: dma: add alternative REQ/ACK protocol selection in stm32-dma |
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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@foss.st.com> > --- > Documentation/devicetree/bindings/dma/st,stm32-dma.yaml | 7 +++++++ > 1 file changed, 7 insertions(+) >
Acked-by: Rob Herring <robh@kernel.org>
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