| Message ID | 1449585124-15596-11-git-send-email-lee.jones@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Tue, Dec 08, 2015 at 02:32:03PM +0000, Lee Jones wrote: > Cc: devicetree@vger.kernel.org > Signed-off-by: Lee Jones <lee.jones@linaro.org> Acked-by: Rob Herring <robh@kernel.org> > --- > .../devicetree/bindings/cpufreq/cpufreq-st.txt | 91 ++++++++++++++++++++++ > 1 file changed, 91 insertions(+) > create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt > > diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt > new file mode 100644 > index 0000000..d91a02a > --- /dev/null > +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt > @@ -0,0 +1,91 @@ > +Binding for ST's CPUFreq driver > +=============================== > + > +ST's CPUFreq driver attempts to read 'process' and 'version' attributes > +from the SoC, then supplies the OPP framework with 'prop' and 'supported > +hardware' information respectively. The framework is then able to read > +the DT and operate in the usual way. > + > +For more information about the expected DT format [See: ../opp/opp.txt]. > + > +Frequency Scaling only > +---------------------- > + > +No vendor specific driver required for this. > + > +Located in CPU's node: > + > +- operating-points : [See: ../power/opp.txt] > + > +Example [safe] > +-------------- > + > +cpus { > + cpu@0 { > + /* kHz uV */ > + operating-points = <1500000 0 > + 1200000 0 > + 800000 0 > + 500000 0>; > + }; > +}; > + > +Dynamic Voltage and Frequency Scaling (DVFS) > +-------------------------------------------- > + > +This requires the ST CPUFreq driver to supply 'process' and 'version' info. > + > +Located in CPU's node: > + > +- operating-points-v2 : [See ../power/opp.txt] > + > +Example [unsafe] > +---------------- > + > +cpus { > + cpu@0 { > + operating-points-v2 = <&cpu0_opp_table>; > + }; > +}; > + > +cpu0_opp_table: opp_table { > + compatible = "operating-points-v2"; > + > + /* ############################################################### */ > + /* # WARNING: Do not attempt to copy/replicate these nodes, # */ > + /* # they are only to be supplied by the bootloader !!! # */ > + /* ############################################################### */ > + opp0 { > + /* Major Minor Substrate */ > + /* 2 all all */ > + opp-supported-hw = <0x00000004 0xffffffff 0xffffffff>; > + opp-hz = /bits/ 64 <1500000000>; > + clock-latency-ns = <10000000>; > + > + opp-microvolt-pcode0 = <1200000>; > + opp-microvolt-pcode1 = <1200000>; > + opp-microvolt-pcode2 = <1200000>; > + opp-microvolt-pcode3 = <1200000>; > + opp-microvolt-pcode4 = <1170000>; > + opp-microvolt-pcode5 = <1140000>; > + opp-microvolt-pcode6 = <1100000>; > + opp-microvolt-pcode7 = <1070000>; > + }; > + > + opp1 { > + /* Major Minor Substrate */ > + /* all all all */ > + opp-supported-hw = <0xffffffff 0xffffffff 0xffffffff>; > + opp-hz = /bits/ 64 <1200000000>; > + clock-latency-ns = <10000000>; > + > + opp-microvolt-pcode0 = <1110000>; > + opp-microvolt-pcode1 = <1150000>; > + opp-microvolt-pcode2 = <1100000>; > + opp-microvolt-pcode3 = <1080000>; > + opp-microvolt-pcode4 = <1040000>; > + opp-microvolt-pcode5 = <1020000>; > + opp-microvolt-pcode6 = <980000>; > + opp-microvolt-pcode7 = <930000>; > + }; > +}; > -- > 1.9.1 > > -- > To unsubscribe from this list: send the line "unsubscribe devicetree" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt new file mode 100644 index 0000000..d91a02a --- /dev/null +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt @@ -0,0 +1,91 @@ +Binding for ST's CPUFreq driver +=============================== + +ST's CPUFreq driver attempts to read 'process' and 'version' attributes +from the SoC, then supplies the OPP framework with 'prop' and 'supported +hardware' information respectively. The framework is then able to read +the DT and operate in the usual way. + +For more information about the expected DT format [See: ../opp/opp.txt]. + +Frequency Scaling only +---------------------- + +No vendor specific driver required for this. + +Located in CPU's node: + +- operating-points : [See: ../power/opp.txt] + +Example [safe] +-------------- + +cpus { + cpu@0 { + /* kHz uV */ + operating-points = <1500000 0 + 1200000 0 + 800000 0 + 500000 0>; + }; +}; + +Dynamic Voltage and Frequency Scaling (DVFS) +-------------------------------------------- + +This requires the ST CPUFreq driver to supply 'process' and 'version' info. + +Located in CPU's node: + +- operating-points-v2 : [See ../power/opp.txt] + +Example [unsafe] +---------------- + +cpus { + cpu@0 { + operating-points-v2 = <&cpu0_opp_table>; + }; +}; + +cpu0_opp_table: opp_table { + compatible = "operating-points-v2"; + + /* ############################################################### */ + /* # WARNING: Do not attempt to copy/replicate these nodes, # */ + /* # they are only to be supplied by the bootloader !!! # */ + /* ############################################################### */ + opp0 { + /* Major Minor Substrate */ + /* 2 all all */ + opp-supported-hw = <0x00000004 0xffffffff 0xffffffff>; + opp-hz = /bits/ 64 <1500000000>; + clock-latency-ns = <10000000>; + + opp-microvolt-pcode0 = <1200000>; + opp-microvolt-pcode1 = <1200000>; + opp-microvolt-pcode2 = <1200000>; + opp-microvolt-pcode3 = <1200000>; + opp-microvolt-pcode4 = <1170000>; + opp-microvolt-pcode5 = <1140000>; + opp-microvolt-pcode6 = <1100000>; + opp-microvolt-pcode7 = <1070000>; + }; + + opp1 { + /* Major Minor Substrate */ + /* all all all */ + opp-supported-hw = <0xffffffff 0xffffffff 0xffffffff>; + opp-hz = /bits/ 64 <1200000000>; + clock-latency-ns = <10000000>; + + opp-microvolt-pcode0 = <1110000>; + opp-microvolt-pcode1 = <1150000>; + opp-microvolt-pcode2 = <1100000>; + opp-microvolt-pcode3 = <1080000>; + opp-microvolt-pcode4 = <1040000>; + opp-microvolt-pcode5 = <1020000>; + opp-microvolt-pcode6 = <980000>; + opp-microvolt-pcode7 = <930000>; + }; +};
Cc: devicetree@vger.kernel.org Signed-off-by: Lee Jones <lee.jones@linaro.org> --- .../devicetree/bindings/cpufreq/cpufreq-st.txt | 91 ++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt