The CPUfreq HW present in some Mediatek chipsets offloads the steps necessary for changing the frequency of CPUs. The driver implements the cpufreq driver interface for this hardware engine.
This patch depends on the MT6779 DTS patch submitted by Hanks Chen https://lkml.org/lkml/2020/8/4/1094 Hector.Yuan (2): dt-bindings: cpufreq: add bindings for MediaTek cpufreq HW cpufreq: mediatek-hw: Add support for Mediatek cpufreq HW driver .../bindings/cpufreq/cpufreq-mediatek-hw.yaml | 61 +++++ arch/arm64/configs/defconfig | 1 + drivers/cpufreq/Kconfig.arm | 11 + drivers/cpufreq/Makefile | 1 + drivers/cpufreq/mediatek-cpufreq-hw.c | 255 ++++++++++++++++++++ 5 files changed, 329 insertions(+) create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml create mode 100644 drivers/cpufreq/mediatek-cpufreq-hw.c
