On 3/14/19 22:26, Maxime Ripard wrote:
> 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".
s/dma/dma-mem/
>
> Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
Acked-by: Georgi Djakov <georgi.djakov@xxxxxxxxxx>
> ---
> Documentation/devicetree/bindings/interconnect/interconnect.txt | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/interconnect/interconnect.txt b/Documentation/devicetree/bindings/interconnect/interconnect.txt
> index 5a3c575b387a..6f5d23a605b7 100644
> --- a/Documentation/devicetree/bindings/interconnect/interconnect.txt
> +++ b/Documentation/devicetree/bindings/interconnect/interconnect.txt
> @@ -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 {
>
