| Message ID | 9512c3223c26c12b02376cf4ba4a74ca29de1132.1552595146.git-series.maxime.ripard@bootlin.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | sunxi: Add DT representation for the MBUS controller | expand |
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@bootlin.com> Acked-by: Georgi Djakov <georgi.djakov@linaro.org> > --- > 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 { >
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 {
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". Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> --- Documentation/devicetree/bindings/interconnect/interconnect.txt | 4 ++++ 1 file changed, 4 insertions(+)