Let's document that we now support specifying path tag information in the
arg cells of the 'interconnects' DT property. This information would be
populated when the xlate_extended() callback is used.
Specifying the tag in DT will allow the interconnect framework to do the
aggregation based on the tag automatically. The users can still use the
icc_set_tag() API if/when needed.
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
Signed-off-by: Georgi Djakov <georgi.djakov@xxxxxxxxxx>
---
.../bindings/interconnect/interconnect.txt | 24 ++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/interconnect/interconnect.txt b/Documentation/devicetree/bindings/interconnect/interconnect.txt
index 6f5d23a605b7..138c544c8c8c 100644
--- a/Documentation/devicetree/bindings/interconnect/interconnect.txt
+++ b/Documentation/devicetree/bindings/interconnect/interconnect.txt
@@ -19,7 +19,8 @@ directly.
Required properties:
- compatible : contains the interconnect provider compatible string
- #interconnect-cells : number of cells in a interconnect specifier needed to
- encode the interconnect node id
+ encode the interconnect node id and optionally add a
+ path tag
Example:
@@ -44,6 +45,10 @@ components it has to interact with.
Required properties:
interconnects : Pairs of phandles and interconnect provider specifier to denote
the edge source and destination ports of the interconnect path.
+ An optional path tag value could specified as additional argument
+ to both endpoints and in such cases, this information will be passed
+ to the interconnect framework to do aggregation based on the attached
+ tag.
Optional properties:
interconnect-names : List of interconnect path name strings sorted in the same
@@ -62,3 +67,20 @@ Example:
interconnects = <&pnoc MASTER_SDCC_1 &bimc SLAVE_EBI_CH0>;
interconnect-names = "sdhc-mem";
};
+
+Example with path tags:
+
+ gnoc: interconnect@17900000 {
+ ...
+ interconnect-cells = <2>;
+ };
+
+ mnoc: interconnect@1380000 {
+ ...
+ interconnect-cells = <2>;
+ };
+
+ cpu@0 {
+ ...
+ interconnects = <&gnoc MASTER_APPSS_PROC 3 &mnoc SLAVE_EBI1 3>;
+ }
