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| author | Amelie Delaunay <amelie.delaunay@foss.st.com> | 2021-06-24 11:39:58 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-07-28 12:39:48 +0530 |
| commit | ef94b0413bf4e0d328989fecf5b773e82c8794ac (patch) | |
| tree | bceded591a739a7b89e2040db0e048db931cca33 /tools/perf/scripts/python/stackcollapse.py | |
| parent | af2eec750281e581a16b6449b83ce5e994b79d89 (diff) | |
dt-bindings: dma: add alternative REQ/ACK protocol selection in stm32-dma
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>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210624093959.142265-2-amelie.delaunay@foss.st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions