[PATCH v1 -next 0/3] RISC-V: ACPI: Enable CPPC based cpufreq support
Sunil V L
sunilvl at ventanamicro.com
Wed Feb 7 19:44:11 PST 2024
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 at ventanamicro.com
(https://lore.kernel.org/lkml/20240118062930.245937-1-sunilvl@ventanamicro.com/)
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
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