Quoting Taniya Das (2018-12-13 20:10:23) > Add QCOM cpufreq firmware device bindings for Qualcomm Technology Inc's > SoCs. This is required for managing the cpu frequency transitions which are > controlled by the hardware engine. > > Signed-off-by: Taniya Das <tdas@xxxxxxxxxxxxxx> > --- Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx> except one question below for Rob. > diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt > new file mode 100644 > index 0000000..33856947 > --- /dev/null > +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt > @@ -0,0 +1,172 @@ > +Qualcomm Technologies, Inc. CPUFREQ Bindings > + > +CPUFREQ HW is a hardware engine used by some Qualcomm Technologies, Inc. (QTI) > +SoCs to manage frequency in hardware. It is capable of controlling frequency > +for multiple clusters. > + > +Properties: > +- compatible > + Usage: required > + Value type: <string> > + Definition: must be "qcom,cpufreq-hw". > + > +- clocks > + Usage: required > + Value type: <phandle> From common clock binding. > + Definition: clock handle for XO clock and GPLL0 clock. > + > +- clock-names > + Usage: required > + Value type: <string> From common clock binding. > + Definition: must be "xo", "alternate". > + > +- reg > + Usage: required > + Value type: <prop-encoded-array> > + Definition: Addresses and sizes for the memory of the HW bases in > + each frequency domain. > +- reg-names > + Usage: Optional > + Value type: <string> > + Definition: Frequency domain name i.e. > + "freq-domain0", "freq-domain1". > + > +- #freq-domain-cells: I still wonder if this should be #qcom,freq-domain-cells, but if Rob is OK I won't complain. > + Usage: required. Nitpick: Weird full-stop here ^ > + Definition: Number of cells in a freqency domain specifier. > + > +* Property qcom,freq-domain > +Devices supporting freq-domain must set their "qcom,freq-domain" property with > +phandle to a cpufreq_hw followed by the Domain ID(0/1) in the CPU DT node. > + > +
