This series adds support for Core Power Reduction (CPR), a form of Adaptive Voltage Scaling (AVS), found on certain Qualcomm SoCs. This series is based on top of the qcs404 cpufreq patch series that hasn't landed yet: https://patchwork.kernel.org/project/linux-arm-msm/list/?series=137809 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 has been developed together with Jorge Ramirez-Ortiz, and 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 Changes since V1: Added a new patch implementing dev_pm_opp_find_level_exact() in order to make the CPR OPP table in device tree cleaner. For more detailed changes, check the "Changes since V1" as comments in the individual patches, where applicable. Jorge Ramirez-Ortiz (1): cpufreq: Add qcs404 to cpufreq-dt-platdev blacklist Niklas Cassel (11): opp: Add dev_pm_opp_find_level_exact() dt-bindings: cpufreq: qcom-nvmem: Make speedbin related properties optional cpufreq: qcom: Refactor the driver to make it easier to extend dt-bindings: cpufreq: qcom-nvmem: Support pstates provided by a power domain cpufreq: qcom: Add support for qcs404 on nvmem driver 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 table arm64: defconfig: enable CONFIG_QCOM_CPR arm64: defconfig: enable CONFIG_ARM_QCOM_CPUFREQ_NVMEM Sricharan R (2): dt-bindings: cpufreq: Re-organise kryo cpufreq to use it for other nvmem based qcom socs cpufreq: qcom: Re-organise kryo cpufreq to use it for other nvmem based qcom socs ...ryo-cpufreq.txt => qcom-nvmem-cpufreq.txt} | 125 +- .../devicetree/bindings/opp/qcom-opp.txt | 19 + .../bindings/power/avs/qcom,cpr.txt | 193 ++ MAINTAINERS | 13 +- arch/arm64/boot/dts/qcom/qcs404.dtsi | 142 +- arch/arm64/configs/defconfig | 2 + drivers/cpufreq/Kconfig.arm | 4 +- drivers/cpufreq/Makefile | 2 +- drivers/cpufreq/cpufreq-dt-platdev.c | 1 + drivers/cpufreq/qcom-cpufreq-kryo.c | 249 --- drivers/cpufreq/qcom-cpufreq-nvmem.c | 352 +++ drivers/opp/core.c | 48 + drivers/power/avs/Kconfig | 15 + drivers/power/avs/Makefile | 1 + drivers/power/avs/qcom-cpr.c | 1885 +++++++++++++++++ include/linux/pm_opp.h | 8 + 16 files changed, 2792 insertions(+), 267 deletions(-) rename Documentation/devicetree/bindings/opp/{kryo-cpufreq.txt => qcom-nvmem-cpufreq.txt} (87%) create mode 100644 Documentation/devicetree/bindings/opp/qcom-opp.txt create mode 100644 Documentation/devicetree/bindings/power/avs/qcom,cpr.txt delete mode 100644 drivers/cpufreq/qcom-cpufreq-kryo.c create mode 100644 drivers/cpufreq/qcom-cpufreq-nvmem.c create mode 100644 drivers/power/avs/qcom-cpr.c -- 2.21.0
