[PATCH v1 1/9] dt-bindings: opp: Introduce opp-peak-KBps and opp-avg-KBps bindings
From: Saravana Kannan
Date: Sat Jun 08 2019 - 00:48:21 EST
Interconnects often quantify their performance points in terms of
bandwidth. So, add opp-peak-KBps (required) and opp-avg-KBps (optional) to
allow specifying Bandwidth OPP tables in DT.
opp-peak-KBps is a required property that replace opp-hz for Bandwidth OPP
opp-avg-KBps is an optional property that can be used in Bandwidth OPP
Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx>
Documentation/devicetree/bindings/opp/opp.txt | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt
index 76b6c79604a5..c869e87caa2a 100644
@@ -83,9 +83,14 @@ properties.
- opp-hz: Frequency in Hz, expressed as a 64-bit big-endian integer. This is a
- required property for all device nodes but devices like power domains. The
- power domain nodes must have another (implementation dependent) property which
- uniquely identifies the OPP nodes.
+ required property for all device nodes but for devices like power domains or
+ bandwidth opp tables. The power domain nodes must have another (implementation
+ dependent) property which uniquely identifies the OPP nodes. The interconnect
+ opps are required to have the opp-peak-bw property.
+- opp-peak-KBps: Peak bandwidth in kilobytes per second, expressed as a 32-bit
+ big-endian integer. This is a required property for all devices that don't
+ have opp-hz. For example, bandwidth OPP tables for interconnect paths.
- opp-microvolt: voltage in micro Volts.
@@ -132,6 +137,10 @@ Optional properties:
- opp-level: A value representing the performance level of the device,
expressed as a 32-bit integer.
+- opp-avg-KBps: Average bandwidth in kilobytes per second, expressed as a
+ 32-bit big-endian integer. This property is only meaningful in OPP tables
+ where opp-peak-KBps is present.
- clock-latency-ns: Specifies the maximum possible transition latency (in
nanoseconds) for switching to this OPP from any other OPP.