Quoting Rajendra Nayak (2018-03-15 21:08:20) > On Qualcomm 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 <rna...@codeaurora.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..56fe87751881 > --- /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
Capitalize qualcomm? > +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 a appropriate voltage based on the value passed. to an > + > +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" Can this be operating-points-v2-level or -qcom-level? Just worried that qcom is too generic. > + > +* OPP Node > + > +Required properties: > +- qcom,level: On Qualcomm platforms an OPP node can describe a positive value > +representing a corner/level thats comminicated with a remote microprocessor s/thats/that's/ > +(Usually called the RPM) which then translates it into a certain voltage on lowercase Usually > +a voltage rail.