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dt-bindings: opp: Introduce opp-level bindings 

Add opp-level as an additional property in the OPP node to describe
the performance level of the device.

On some SoCs (especially from Qualcomm and MediaTek) this value
is communicated to a remote microprocessor by the CPU, which
then takes some actions (like adjusting voltage values across various
rails) based on the value passed.

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
hifive-unleashed-5.1
Rajendra Nayak 2019-01-10 09:32:01 +05:30 committed by Andy Gross
parent a5fc752603
commit cea8e2f393
1 changed files with 3 additions and 0 deletions
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Documentation/devicetree/bindings/opp/opp.txt
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@ -129,6 +129,9 @@ Optional properties:
- opp-microamp-<name>: Named opp-microamp property. Similar to
opp-microvolt-<name> property, but for microamp instead.
- opp-level: A value representing the performance level of the device,
expressed as a 32-bit integer.
- clock-latency-ns: Specifies the maximum possible transition latency (in
nanoseconds) for switching to this OPP from any other OPP.