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The Linux kernel configuration item CONFIG_ACPI_CPPC_CPUFREQ
has multiple definitions:
drivers/cpufreq/Kconfig
The configuration item CONFIG_ACPI_CPPC_CPUFREQ:
( CONFIG_ACPI_PROCESSOR ) && ( CONFIG_ARM || CONFIG_ARM64 || CONFIG_RISCV )
cppc_cpufreq
, cppc_cpufreq
This adds a CPUFreq driver which uses CPPC methods as described in the ACPIv5.1 spec. CPPC stands for Collaborative Processor Performance Controls. It is based on an abstract continuous scale of CPU performance values which allows the remote power processor to flexibly optimize for power and performance. CPPC relies on power management firmware support for its operation.
If in doubt, say N.
drivers/cpufreq/Kconfig.arm
The configuration item CONFIG_ACPI_CPPC_CPUFREQ:
CONFIG_ACPI_PROCESSOR
cppc_cpufreq
, cppc_cpufreq
This adds a CPUFreq driver which uses CPPC methods as described in the ACPIv5.1 spec. CPPC stands for Collaborative Processor Performance Controls. It is based on an abstract continuous scale of CPU performance values which allows the remote power processor to flexibly optimize for power and performance. CPPC relies on power management firmware support for its operation.
If in doubt, say N.
Raw data from LKDDb:
lkddb acpi "ACPI0007" : CONFIG_ACPI_CPPC_CPUFREQ CONFIG_CPU_FREQ : drivers/cpufreq/cppc_cpufreq.c # in 4.10–4.20, 5.0–5.19, 6.0–6.12
lkddb module cppc_cpufreq CONFIG_ACPI_CPPC_CPUFREQ : drivers/cpufreq/Kconfig : "CPUFreq driver based on the ACPI CPPC spec" # in 6.9–6.12
lkddb module cppc_cpufreq CONFIG_ACPI_CPPC_CPUFREQ : drivers/cpufreq/Kconfig.arm : "CPUFreq driver based on the ACPI CPPC spec" # in 4.4–4.20, 5.0–5.19, 6.0–6.8
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Automatically generated (in year 2024). See also LKDDb sources on GitLab