| Message ID | 20190404050931.9812-1-niklas.cassel@linaro.org (mailing list archive) |
|---|---|
| Headers | show |
| Series | Add support for QCOM Core Power Reduction | expand |
On Thu, Apr 4, 2019 at 10:40 AM Niklas Cassel <niklas.cassel@linaro.org> wrote: > > This is a first RFC for Core Power Reduction (CPR), a form of > Adaptive Voltage Scaling (AVS), found on certain Qualcomm SoCs. > > Since this is simply an RFC, things like MAINTAINERS hasn't > been updated yet. > > CPR is a technology that reduces core power on a CPU or on other device. > It reads voltage settings from efuses (that have been written in production), > it uses these voltage settings as initial values, for each OPP. > > After moving to a certain OPP, CPR monitors dynamic factors such as > temperature, etc. and adjusts the voltage for that frequency accordingly > to save power and meet silicon characteristic requirements. > > This driver is based on an RFC by Stephen Boyd[1], which in turn is > based on work by others on codeaurora.org[2]. > > [1] https://lkml.org/lkml/2015/9/18/833 > [2] https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.10/tree/drivers/regulator/cpr-regulator.c?h=msm-3.10 Please add relevant people to all the patches as it makes their life easier and never miss anyone from the cover-letter :) -- viresh
This is a first RFC for Core Power Reduction (CPR), a form of Adaptive Voltage Scaling (AVS), found on certain Qualcomm SoCs. Since this is simply an RFC, things like MAINTAINERS hasn't been updated yet. CPR is a technology that reduces core power on a CPU or on other device. It reads voltage settings from efuses (that have been written in production), it uses these voltage settings as initial values, for each OPP. After moving to a certain OPP, CPR monitors dynamic factors such as temperature, etc. and adjusts the voltage for that frequency accordingly to save power and meet silicon characteristic requirements. This driver is based on an RFC by Stephen Boyd[1], which in turn is based on work by others on codeaurora.org[2]. [1] https://lkml.org/lkml/2015/9/18/833 [2] https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.10/tree/drivers/regulator/cpr-regulator.c?h=msm-3.10 Jorge Ramirez-Ortiz (3): drivers: regulator: qcom_spmi: enable linear range info cpufreq: qcom: support qcs404 on nvmem driver cpufreq: Add qcs404 to cpufreq-dt-platdev blacklist Niklas Cassel (5): cpufreq: qcom: create a driver struct dt-bindings: opp: Add qcom-opp bindings with properties needed for CPR dt-bindings: power: avs: Add support for CPR (Core Power Reduction) power: avs: Add support for CPR (Core Power Reduction) arm64: dts: qcom: qcs404: Add CPR and populate OPP tables Sricharan R (1): cpufreq: qcom: Re-organise kryo cpufreq to use it for other nvmem based qcom socs ...ryo-cpufreq.txt => qcom-nvmem-cpufreq.txt} | 16 +- .../devicetree/bindings/opp/qcom-opp.txt | 24 + .../bindings/power/avs/qcom,cpr.txt | 119 ++ arch/arm64/boot/dts/qcom/qcs404.dtsi | 152 +- drivers/cpufreq/Kconfig.arm | 4 +- drivers/cpufreq/Makefile | 2 +- drivers/cpufreq/cpufreq-dt-platdev.c | 1 + ...om-cpufreq-kryo.c => qcom-cpufreq-nvmem.c} | 197 +- drivers/power/avs/Kconfig | 15 + drivers/power/avs/Makefile | 1 + drivers/power/avs/qcom-cpr.c | 1777 +++++++++++++++++ drivers/regulator/qcom_spmi-regulator.c | 7 + 12 files changed, 2234 insertions(+), 81 deletions(-) rename Documentation/devicetree/bindings/opp/{kryo-cpufreq.txt => qcom-nvmem-cpufreq.txt} (97%) create mode 100644 Documentation/devicetree/bindings/opp/qcom-opp.txt create mode 100644 Documentation/devicetree/bindings/power/avs/qcom,cpr.txt rename drivers/cpufreq/{qcom-cpufreq-kryo.c => qcom-cpufreq-nvmem.c} (52%) create mode 100644 drivers/power/avs/qcom-cpr.c