Commit c43a4469 authored Apr 01, 2019 by Maxime Ripard Committed by Rob Herring Apr 10, 2019

dt-bindings: interconnect: Add a dma interconnect name



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>

parent ecb0abc1

Documentation/devicetree/bindings/interconnect/interconnect.txt

+4 −0

Original line number	Diff line number	Diff line
		@@ -51,6 +51,10 @@ interconnect-names : List of interconnect path name strings sorted in the same
		interconnect-names to match interconnect paths with interconnect
		specifier pairs.

		Reserved interconnect names:
		* dma-mem: Path from the device to the main memory of
		the system

		Example:

		sdhci@7864000 {