提交 45a41875 编写于 作者: S Saravana Kannan 提交者: Viresh Kumar

dt-bindings: opp: Introduce opp-peak-kBps and opp-avg-kBps bindings

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 replaces opp-hz for Bandwidth OPP
tables.

opp-avg-kBps is an optional property that can be used in Bandwidth OPP
tables.
Signed-off-by: NSaravana Kannan <saravanak@google.com>
Signed-off-by: NGeorgi Djakov <georgi.djakov@linaro.org>
Reviewed-by: NSibi Sankar <sibis@codeaurora.org>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
上级 ae83d0b4
......@@ -83,9 +83,14 @@ properties.
Required 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, unless another "required" property to
uniquely identify the OPP nodes exists. Devices like power domains must have
another (implementation dependent) property.
- opp-peak-kBps: Peak bandwidth in kilobytes per second, expressed as an array
of 32-bit big-endian integers. Each element of the array represents the
peak bandwidth value of each interconnect path. The number of elements should
match the number of interconnect paths.
Optional properties:
- opp-microvolt: voltage in micro Volts.
......@@ -132,6 +137,12 @@ 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 an array
of 32-bit big-endian integers. Each element of the array represents the
average bandwidth value of each interconnect path. The number of elements
should match the number of interconnect paths. 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.
......
......@@ -41,3 +41,7 @@ Temperature
Pressure
----------------------------------------
-kpascal : kilopascal
Throughput
----------------------------------------
-kBps : kilobytes per second
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