This series enables the support for "Collaborative Processor Performance Control (CPPC) on ACPI based RISC-V platforms. It depends on the encoding of CPPC registers as defined in RISC-V FFH spec [2]. CPPC is described in the ACPI spec [1]. RISC-V FFH spec required to enable this, is available at [2]. [1] - https://uefi.org/specs/ACPI/6.5/08_Processor_Configuration_and_Control.html#collaborative-processor-performance-control [2] - https://github.com/riscv-non-isa/riscv-acpi-ffh/releases/download/v1.0.0/riscv-ffh.pdf The series is based on the LPI support series. Based-on: 20240118062930.245937-1-sunilvl@xxxxxxxxxxxxxxxx (https://lore.kernel.org/lkml/20240118062930.245937-1-sunilvl@xxxxxxxxxxxxxxxx/) Sunil V L (3): ACPI: RISC-V: Add CPPC driver cpufreq: Move CPPC configs to common Kconfig and add RISC-V RISC-V: defconfig: Enable CONFIG_ACPI_CPPC_CPUFREQ arch/riscv/configs/defconfig | 1 + drivers/acpi/riscv/Makefile | 1 + drivers/acpi/riscv/cppc.c | 157 +++++++++++++++++++++++++++++++++++ drivers/cpufreq/Kconfig | 29 +++++++ drivers/cpufreq/Kconfig.arm | 26 ------ 5 files changed, 188 insertions(+), 26 deletions(-) create mode 100644 drivers/acpi/riscv/cppc.c -- 2.34.1
