Add the "opp-interconnect-bw" property to specify the
average and peak bandwidth for an interconnect path for
a specific operating power point. A separate bandwidth
pair can be specified for each of the interconnects
defined for the device by appending the interconnect
name to the property.
Signed-off-by: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/opp/opp.txt | 36 +++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt
index c396c4c0af92..d714c084f36d 100644
--- a/Documentation/devicetree/bindings/opp/opp.txt
+++ b/Documentation/devicetree/bindings/opp/opp.txt
@@ -170,6 +170,11 @@ Optional properties:
functioning of the current device at the current OPP (where this property is
present).
+- opp-interconnect-bw-<name>: This is an array of pairs specifying the average
+ and peak bandwidth in bytes per second for the interconnect path known by
+ 'name'. This should match the name(s) specified by interconnect-names in the
+ device definition.
+
Example 1: Single cluster Dual-core ARM cortex A9, switch DVFS states together.
/ {
@@ -543,3 +548,34 @@ Example 6: opp-microvolt-<name>, opp-microamp-<name>:
};
};
};
+
+Example 7: opp-interconnect-bw:
+(example: leaf device with frequency and BW quotas)
+
+/ {
+ soc {
+ gpu@5000000 {
+ ...
+ interconnects = <&qnoc 26 &qnoc 512>;
+ interconnect-names = "port0";
+ ...
+ operating-points-v2 = <&gpu_opp_table>;
+ };
+ };
+
+ gpu_opp_table: opp_table0 {
+ compatible = "operating-points-v2";
+
+ opp-710000000 {
+ op-hz = /bits/ 64 <710000000>;
+ /* Set peak bandwidth @ 7216000 KB/s */
+ opp-interconnect-bw-port0 = /bits/ 64 <0 7216000000>;
+ };
+
+ opp-210000000 {
+ op-hz = /bits/ 64 <210000000>;
+ /* Set peak bandwidth @ 1200000 KB/s */
+ opp-interconnect-bw-port0 = /bits/ 64 <0 1200000000>;
+ };
+ };
+};
--
2.18.0
