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. The v6 of this series is resent with Acks added.
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 (3): dt-bindings: mediatek: Add MT8173 CPU DVFS clock bindings cpufreq: mediatek: Add MT8173 cpufreq driver arm64: dts: mt8173: Add mt8173 cpufreq driver support
.../devicetree/bindings/clock/mt8173-cpu-dvfs.txt | 83 ++++ 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 +++++++++++++++++++++ 6 files changed, 697 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/mt8173-cpu-dvfs.txt create mode 100644 drivers/cpufreq/mt8173-cpufreq.c