| Message ID | 20181204052119.806-2-rnayak@codeaurora.org (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | Add power domain driver for corners on msm8996/sdm845 | expand |
Quoting Rajendra Nayak (2018-12-03 21:21:12) > On Qualcomm Technologies, Inc. platforms, an OPP node needs > to describe an additional level/corner value that is then 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. > > Describe these bindings in the qcom-opp bindings document. > > Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> > Acked-by: Viresh Kumar <viresh.kumar@linaro.org> > --- Reviewed-by: Stephen Boyd <swboyd@chromium.org>
On Tue, 4 Dec 2018 10:51:12 +0530, Rajendra Nayak wrote: > On Qualcomm Technologies, Inc. platforms, an OPP node needs > to describe an additional level/corner value that is then 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. > > Describe these bindings in the qcom-opp bindings document. > > Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> > Acked-by: Viresh Kumar <viresh.kumar@linaro.org> > --- > .../devicetree/bindings/opp/qcom-opp.txt | 25 +++++++++++++++++++ > 1 file changed, 25 insertions(+) > create mode 100644 Documentation/devicetree/bindings/opp/qcom-opp.txt > Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/opp/qcom-opp.txt b/Documentation/devicetree/bindings/opp/qcom-opp.txt new file mode 100644 index 000000000000..db4d970c7ec7 --- /dev/null +++ b/Documentation/devicetree/bindings/opp/qcom-opp.txt @@ -0,0 +1,25 @@ +Qualcomm OPP bindings to descibe OPP nodes with corner/level values + +OPP tables for devices on Qualcomm platforms require an additional +platform specific corner/level value to be specified. +This value is passed on to the RPM (Resource Power Manager) by +the CPU, which then takes the necessary actions to set a voltage +rail to an appropriate voltage based on the value passed. + +The bindings are based on top of the operating-points-v2 bindings +described in Documentation/devicetree/bindings/opp/opp.txt +Additional properties are described below. + +* OPP Table Node + +Required properties: +- compatible: Allow OPPs to express their compatibility. It should be: + "operating-points-v2-qcom-level" + +* OPP Node + +Required properties: +- qcom,level: On Qualcomm platforms an OPP node can describe a positive value +representing a corner/level that's communicated with a remote microprocessor +(usually called the RPM) which then translates it into a certain voltage on +a voltage rail.