MT8173 is a ARMv8 based SoC with 2 clusters. All CPUs in a single cluster share the same power and clock domain. This series tries to add cpufreq support for MT8173 SoC.
changes in v6: - Move clock and regulator consumer properties document to the device tree bindings documents of MT8173 CPU DVFS clock driver - Add change log to describe what is implemented in the MT8173 cpufreq driver - Add missed rcu_read_unlock() in the error path - Move of_init_opp_table() call to make sure all required hardware resources are already there before it is called - Add comments to describe why both platform driver and deivce registration codes are put in the initcall function - Use the term "voltage tracking" instead of "voltage trace" according to an internal SoC document
changes in v5: - Move resource allocation code from init() into probe() and remove some unused functions due to this change - Fix descriptions for device tree binding document - Address review comments for last version - Register CPU cooling device
Changes in v4: - Add bindings for MT8173 cpufreq driver - Move OPP table back into device tree - Address comments for last version
Changes in v3: - Implement MT8173 specific standalone cpufreq driver instead of using cpufreq-dt driver - Define OPP table in the driver source code until new OPP binding is ready
Changes in v2: - Add intermediate frequency support in cpufreq-dt driver - Use voltage scaling code of cpufreq-dt for little cluster instead of implementaion in notifier of mtk-cpufreq driver - Code refinement for mtk-cpufreq driver
Pi-Cheng Chen (4): dt-bindings: mediatek: Add MT8173 CPU DVFS clock bindings dt-bindings: mediatek: Add MT8173 cpufreq driver bindings cpufreq: mediatek: Add MT8173 cpufreq driver arm64: dts: mt8173: Add mt8173 cpufreq driver support
.../devicetree/bindings/clock/mt8173-cpu-dvfs.txt | 83 ++++ .../devicetree/bindings/cpufreq/cpufreq-mt8173.txt | 134 ++++++ arch/arm64/boot/dts/mediatek/mt8173-evb.dts | 18 + arch/arm64/boot/dts/mediatek/mt8173.dtsi | 64 +++ drivers/cpufreq/Kconfig.arm | 7 + drivers/cpufreq/Makefile | 1 + drivers/cpufreq/mt8173-cpufreq.c | 524 +++++++++++++++++++++ 7 files changed, 831 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/mt8173-cpu-dvfs.txt create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-mt8173.txt create mode 100644 drivers/cpufreq/mt8173-cpufreq.c