# Copyright (c) 2025 Analog Devices, Inc.
#
# SPDX-License-Identifier: Apache-2.0

config HAS_CPU_FREQ
	bool
	help
	  Enabled by the SoC if it has a DTS property indicating support for
	  CPU frequency scaling.

menuconfig CPU_FREQ
	bool "CPU Frequency Scaling Subsystem"
	select EXPERIMENTAL
	help
	  CPU Frequency scaling subsystem

if CPU_FREQ

module = CPU_FREQ
module-str = CPU Frequency Scaling
source "subsys/logging/Kconfig.template.log_config"

config CPU_FREQ_INTERVAL_MS
	int "CPU Freq evaluation interval"
	default 1000
	help
	  Controls the interval (in milliseconds) at which the CPU Frequency
	  subsystem runs and evaluates the current policy.

config CPU_FREQ_PER_CPU_SCALING
	bool "Per-CPU frequency scaling"
	default n
	depends on SMP
	help
	  Enable per-CPU frequency scaling support. If disabled, setting the
	  P-state will apply to the whole system instead of just the current CPU.
	  This should be done at the SoC level.

choice CPU_FREQ_POLICY
	prompt "CPU Frequency Scaling Policy"
	default CPU_FREQ_POLICY_NONE
	help
	  The policy algorithm to use when using the CPU freq subsystem.

config CPU_FREQ_POLICY_NONE
	bool "No selected policy"
	help
	  Kconfig placeholder if no policy is chosen. This Kconfig will produce a build error

config CPU_FREQ_POLICY_ON_DEMAND
	bool "On-demand Policy"
	select CPU_LOAD_METRIC

endchoice # CPU_FREQ_POLICY

choice CPU_FREQ_PSTATE_SET
	prompt "Select method of setting CPU P-state"
	default CPU_FREQ_PSTATE_SET_SOC if HAS_CPU_FREQ
	default CPU_FREQ_PSTATE_SET_STUB
	help
	  The implementation used to set the CPU P-state.

config CPU_FREQ_PSTATE_SET_STUB
	bool "Stub P-state setter"
	help
	  A stub implementation that does nothing. This is useful for
	  exercising the CPU frequency subsystem without actually
	  changing the CPU frequency.

config CPU_FREQ_PSTATE_SET_SOC
	bool "SoC-specific P-state setter"
	depends on HAS_CPU_FREQ
	help
	  A SoC-specific implementation that sets the CPU P-state using
	  SoC-specific mechanisms. This requires the SoC to provide
	  the necessary implementation of cpu_freq_pstate_set().

config CPU_FREQ_PSTATE_SET_CUSTOM
	bool "Custom P-state setter defined by the project"
	help
	  A custom implementation that sets the CPU P-state using
	  project-specific mechanisms. This requires the project to provide
	  the necessary implementation of cpu_freq_pstate_set().

endchoice # CPU_FREQ_PSTATE_SET

endif # CPU_FREQ