| Message ID | 1493997974-17699-7-git-send-email-sean.wang@mediatek.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Stephen Boyd |
| Headers | show |
On 05-05-17, 23:26, sean.wang@mediatek.com wrote: > From: Sean Wang <sean.wang@mediatek.com> > > Update binding document to reflect the lastest driver logic and The bindings don't follow the drivers but its the other way around. Don't mention anything about the drivers in the bindings patches. > add more examples guiding people how to use Mediatek cpufreq driver. > > Signed-off-by: Sean Wang <sean.wang@mediatek.com> > --- > .../bindings/cpufreq/cpufreq-mediatek.txt | 170 ++++++++++++++++++++- > 1 file changed, 167 insertions(+), 3 deletions(-) > > diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt > index 52b457c..0703927 100644 > --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt > +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt > @@ -1,4 +1,5 @@ > -Device Tree Clock bindins for CPU DVFS of Mediatek MT8173 SoC > +Binding for Mediatek's CPUFreq driver > +===================================== > > Required properties: > - clocks: A list of phandle + clock-specifier pairs for the clocks listed in clock names. > @@ -9,6 +10,8 @@ Required properties: > transition and not stable yet. > Please refer to Documentation/devicetree/bindings/clk/clock-bindings.txt for > generic clock consumer properties. > +- operating-points-v2: Pleaser refer to Documentation/devicetree/bindings/opp/opp.txt > + for detail. > - proc-supply: Regulator for Vproc of CPU cluster. > > Optional properties: > @@ -17,9 +20,166 @@ Optional properties: > Vsram to fit SoC specific needs. When absent, the voltage scaling > flow is handled by hardware, hence no software "voltage tracking" is > needed. > +- #cooling-cells: > +- cooling-min-level: > +- cooling-max-level: > + Please refer to Documentation/devicetree/bindings/thermal/thermal.txt > + for detail. > + > +Example 1 (MT7623 SoC): > + > + cpu_opp_table: opp_table { > + compatible = "operating-points-v2"; > + opp-shared; > + > + opp@598000000 { s/opp@/opp-/
On Mon, 2017-05-08 at 09:50 +0530, Viresh Kumar wrote: > On 05-05-17, 23:26, sean.wang@mediatek.com wrote: > > From: Sean Wang <sean.wang@mediatek.com> > > > > Update binding document to reflect the lastest driver logic and > > The bindings don't follow the drivers but its the other way around. Don't > mention anything about the drivers in the bindings patches. Okay. I made a mistake: DT bindings shouldn't reference drivers and they are OS-agnostic. I will correct them with the principle. Thanks for your patience and guidance > > add more examples guiding people how to use Mediatek cpufreq driver. > > > > Signed-off-by: Sean Wang <sean.wang@mediatek.com> > > --- > > .../bindings/cpufreq/cpufreq-mediatek.txt | 170 ++++++++++++++++++++- > > 1 file changed, 167 insertions(+), 3 deletions(-) > > > > diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt > > index 52b457c..0703927 100644 > > --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt > > +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt > > @@ -1,4 +1,5 @@ > > -Device Tree Clock bindins for CPU DVFS of Mediatek MT8173 SoC > > +Binding for Mediatek's CPUFreq driver > > +===================================== > > > > Required properties: > > - clocks: A list of phandle + clock-specifier pairs for the clocks listed in clock names. > > @@ -9,6 +10,8 @@ Required properties: > > transition and not stable yet. > > Please refer to Documentation/devicetree/bindings/clk/clock-bindings.txt for > > generic clock consumer properties. > > +- operating-points-v2: Pleaser refer to Documentation/devicetree/bindings/opp/opp.txt > > + for detail. > > - proc-supply: Regulator for Vproc of CPU cluster. > > > > Optional properties: > > @@ -17,9 +20,166 @@ Optional properties: > > Vsram to fit SoC specific needs. When absent, the voltage scaling > > flow is handled by hardware, hence no software "voltage tracking" is > > needed. > > +- #cooling-cells: > > +- cooling-min-level: > > +- cooling-max-level: > > + Please refer to Documentation/devicetree/bindings/thermal/thermal.txt > > + for detail. > > + > > +Example 1 (MT7623 SoC): > > + > > + cpu_opp_table: opp_table { > > + compatible = "operating-points-v2"; > > + opp-shared; > > + > > + opp@598000000 { > > s/opp@/opp-/ I have referred to other dt-binding as examples where they also use opp@ as the prefix word. e.g bindings/cpufreq/ti-cpufreq.txt did it. Or I misunderstand something you pointed out here ? > -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 08-05-17, 14:58, Sean Wang wrote: > > > + opp@598000000 { > > > > s/opp@/opp-/ > > I have referred to other dt-binding as examples where they also use opp@ > as the prefix word. e.g bindings/cpufreq/ti-cpufreq.txt did it. > > Or I misunderstand something you pointed out here ? Its on the way: https://marc.info/?l=linux-kernel&m=149266711829469&w=2
diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt index 52b457c..0703927 100644 --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.txt @@ -1,4 +1,5 @@ -Device Tree Clock bindins for CPU DVFS of Mediatek MT8173 SoC +Binding for Mediatek's CPUFreq driver +===================================== Required properties: - clocks: A list of phandle + clock-specifier pairs for the clocks listed in clock names. @@ -9,6 +10,8 @@ Required properties: transition and not stable yet. Please refer to Documentation/devicetree/bindings/clk/clock-bindings.txt for generic clock consumer properties. +- operating-points-v2: Pleaser refer to Documentation/devicetree/bindings/opp/opp.txt + for detail. - proc-supply: Regulator for Vproc of CPU cluster. Optional properties: @@ -17,9 +20,166 @@ Optional properties: Vsram to fit SoC specific needs. When absent, the voltage scaling flow is handled by hardware, hence no software "voltage tracking" is needed. +- #cooling-cells: +- cooling-min-level: +- cooling-max-level: + Please refer to Documentation/devicetree/bindings/thermal/thermal.txt + for detail. + +Example 1 (MT7623 SoC): + + cpu_opp_table: opp_table { + compatible = "operating-points-v2"; + opp-shared; + + opp@598000000 { + opp-hz = /bits/ 64 <598000000>; + opp-microvolt = <1050000>; + }; + + opp@747500000 { + opp-hz = /bits/ 64 <747500000>; + opp-microvolt = <1050000>; + }; + + opp@1040000000 { + opp-hz = /bits/ 64 <1040000000>; + opp-microvolt = <1150000>; + }; + + opp@1196000000 { + opp-hz = /bits/ 64 <1196000000>; + opp-microvolt = <1200000>; + }; + + opp@1300000000 { + opp-hz = /bits/ 64 <1300000000>; + opp-microvolt = <1300000>; + }; + }; + + cpu0: cpu@0 { + device_type = "cpu"; + compatible = "arm,cortex-a7"; + reg = <0x0>; + clocks = <&infracfg CLK_INFRA_CPUSEL>, + <&apmixedsys CLK_APMIXED_MAINPLL>; + clock-names = "cpu", "intermediate"; + operating-points-v2 = <&cpu_opp_table>; + #cooling-cells = <2>; + cooling-min-level = <0>; + cooling-max-level = <7>; + }; + cpu@1 { + device_type = "cpu"; + compatible = "arm,cortex-a7"; + reg = <0x1>; + operating-points-v2 = <&cpu_opp_table>; + }; + cpu@2 { + device_type = "cpu"; + compatible = "arm,cortex-a7"; + reg = <0x2>; + operating-points-v2 = <&cpu_opp_table>; + }; + cpu@3 { + device_type = "cpu"; + compatible = "arm,cortex-a7"; + reg = <0x3>; + operating-points-v2 = <&cpu_opp_table>; + }; + +Example 2 (MT8173 SoC): + cpu_opp_table_a: opp_table_a { + compatible = "operating-points-v2"; + opp-shared; + + opp@507000000 { + opp-hz = /bits/ 64 <507000000>; + opp-microvolt = <859000>; + }; + + opp@702000000 { + opp-hz = /bits/ 64 <702000000>; + opp-microvolt = <908000>; + }; + + opp@1001000000 { + opp-hz = /bits/ 64 <1001000000>; + opp-microvolt = <983000>; + }; + + opp@1105000000 { + opp-hz = /bits/ 64 <1105000000>; + opp-microvolt = <1009000>; + }; + + opp@1183000000 { + opp-hz = /bits/ 64 <1183000000>; + opp-microvolt = <1028000>; + }; + + opp@1404000000 { + opp-hz = /bits/ 64 <1404000000>; + opp-microvolt = <1083000>; + }; + + opp@1508000000 { + opp-hz = /bits/ 64 <1508000000>; + opp-microvolt = <1109000>; + }; + + opp@1573000000 { + opp-hz = /bits/ 64 <1573000000>; + opp-microvolt = <1125000>; + }; + }; + + cpu_opp_table_b: opp_table_b { + compatible = "operating-points-v2"; + opp-shared; + + opp@507000000 { + opp-hz = /bits/ 64 <507000000>; + opp-microvolt = <828000>; + }; + + opp@702000000 { + opp-hz = /bits/ 64 <702000000>; + opp-microvolt = <867000>; + }; + + opp@1001000000 { + opp-hz = /bits/ 64 <1001000000>; + opp-microvolt = <927000>; + }; + + opp@1209000000 { + opp-hz = /bits/ 64 <1209000000>; + opp-microvolt = <968000>; + }; + + opp@1404000000 { + opp-hz = /bits/ 64 <1007000000>; + opp-microvolt = <1028000>; + }; + + opp@1612000000 { + opp-hz = /bits/ 64 <1612000000>; + opp-microvolt = <1049000>; + }; + + opp@1807000000 { + opp-hz = /bits/ 64 <1807000000>; + opp-microvolt = <1089000>; + }; + + opp@1989000000 { + opp-hz = /bits/ 64 <1989000000>; + opp-microvolt = <1125000>; + }; + }; -Example: --------- cpu0: cpu@0 { device_type = "cpu"; compatible = "arm,cortex-a53"; @@ -29,6 +189,7 @@ Example: clocks = <&infracfg CLK_INFRA_CA53SEL>, <&apmixedsys CLK_APMIXED_MAINPLL>; clock-names = "cpu", "intermediate"; + operating-points-v2 = <&cpu_opp_table_a>; }; cpu1: cpu@1 { @@ -40,6 +201,7 @@ Example: clocks = <&infracfg CLK_INFRA_CA53SEL>, <&apmixedsys CLK_APMIXED_MAINPLL>; clock-names = "cpu", "intermediate"; + operating-points-v2 = <&cpu_opp_table_a>; }; cpu2: cpu@100 { @@ -51,6 +213,7 @@ Example: clocks = <&infracfg CLK_INFRA_CA57SEL>, <&apmixedsys CLK_APMIXED_MAINPLL>; clock-names = "cpu", "intermediate"; + operating-points-v2 = <&cpu_opp_table_b>; }; cpu3: cpu@101 { @@ -62,6 +225,7 @@ Example: clocks = <&infracfg CLK_INFRA_CA57SEL>, <&apmixedsys CLK_APMIXED_MAINPLL>; clock-names = "cpu", "intermediate"; + operating-points-v2 = <&cpu_opp_table_b>; }; &cpu0 {