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The STM32 DMA3 is a Direct Memory Access controller with different features depending on its hardware configuration. The channels have not the same capabilities, some have a larger FIFO, so their performance is higher. This patch describes STM32 DMA3 bindings, used to select a channel that fits client requirements, and to pre-configure the channel depending on the client needs. Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20240531150712.2503554-5-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>