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The current DT bindings assume that the DMA will be performed by the devices through their parent DT node, and rely on that assumption for the address translation using dma-ranges. However, some SoCs have devices that will perform DMA through another bus, with separate address translation rules. We therefore need to express that relationship, through the special interconnect name "dma-mem". Acked-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Signed-off-by: Rob Herring <robh@kernel.org>