diff options
| author | Amelie Delaunay <amelie.delaunay@foss.st.com> | 2024-10-16 14:39:56 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2024-10-21 22:51:45 +0530 |
| commit | e18a9830233e739ae7045700232c53b4cb2e98eb (patch) | |
| tree | 81579a7c01c760e9530b70856382268ef1b52f84 | |
| parent | cb467c451163bacad4cbb7540ce7d731946f13f9 (diff) | |
dt-bindings: dma: stm32-dma3: prevent additional transfers
Some devices require a single transfer. For example, reading FMC ECC status
registers does not support multiple transfers.
Add the possibility to prevent additional transfers, by setting bit 17 of
the 'DMA transfer requirements' bit mask.
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20241016-dma3-mp25-updates-v3-4-8311fe6f228d@foss.st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml b/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml index 5484848735f8..36f9fe860eb9 100644 --- a/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml +++ b/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml @@ -99,6 +99,9 @@ properties: -bit 16: Prevent packing/unpacking mode 0x0: pack/unpack enabled when source data width/burst != destination data width/burst 0x1: memory data width/burst forced to peripheral data width/burst to prevent pack/unpack + -bit 17: Prevent additional transfers due to linked-list refactoring + 0x0: don't prevent additional transfers for optimal performance + 0x1: prevent additional transfer to accommodate user constraints such as single transfer required: - compatible |