esp-idf/components/esp_pm/Kconfig

menu "Power Management"
    config PM_ENABLE
        bool "Support for power management"
        default n
        help
            If enabled, application is compiled with support for power management.
            This option has run-time overhead (increased interrupt latency,
            longer time to enter idle state), and it also reduces accuracy of
            RTOS ticks and timers used for timekeeping.
            Enable this option if application uses power management APIs.

    config PM_DFS_INIT_AUTO
        bool "Enable dynamic frequency scaling (DFS) at startup"
        depends on PM_ENABLE
        default n
        help
            If enabled, startup code configures dynamic frequency scaling.
            Max CPU frequency is set to DEFAULT_CPU_FREQ_MHZ setting,
            min frequency is set to XTAL frequency.
            If disabled, DFS will not be active until the application
            configures it using esp_pm_configure function.


    config PM_USE_RTC_TIMER_REF
        bool "Use RTC timer to prevent time drift (EXPERIMENTAL)"
        depends on (PM_ENABLE && ESP_TIMER_IMPL_FRC2 && ESP_TIME_FUNCS_USE_RTC_TIMER)
        default n
        help
            When APB clock frequency changes, high-resolution timer (esp_timer)
            scale and base value need to be adjusted. Each adjustment may cause
            small error, and over time such small errors may cause time drift.
            If this option is enabled, RTC timer will be used as a reference to
            compensate for the drift.
            It is recommended that this option is only used if 32k XTAL is selected
            as RTC clock source.

    config PM_PROFILING
        bool "Enable profiling counters for PM locks"
        depends on PM_ENABLE
        default n
        help
            If enabled, esp_pm_* functions will keep track of the amount of time
            each of the power management locks has been held, and esp_pm_dump_locks
            function will print this information.
            This feature can be used to analyze which locks are preventing the chip
            from going into a lower power state, and see what time the chip spends
            in each power saving mode. This feature does incur some run-time
            overhead, so should typically be disabled in production builds.

    config PM_TRACE
        bool "Enable debug tracing of PM using GPIOs"
        depends on PM_ENABLE
        default n
        help
            If enabled, some GPIOs will be used to signal events such as RTOS ticks,
            frequency switching, entry/exit from idle state. Refer to pm_trace.c
            file for the list of GPIOs.
            This feature is intended to be used when analyzing/debugging behavior
            of power management implementation, and should be kept disabled in
            applications.

    config PM_SLP_IRAM_OPT
        bool "Put lightsleep related codes in internal RAM"
        depends on FREERTOS_USE_TICKLESS_IDLE
        help
            If enabled, about 1.8KB of lightsleep related source code would be in IRAM and chip would sleep
            longer for 760us at most each time.
            This feature is intended to be used when lower power consumption is needed
            while there is enough place in IRAM to place source code.

    config PM_RTOS_IDLE_OPT
        bool "Put RTOS IDLE related codes in internal RAM"
        depends on FREERTOS_USE_TICKLESS_IDLE
        help
            If enabled, about 260B of RTOS_IDLE related source code would be in IRAM and chip would sleep
            longer for 40us at most each time.
            This feature is intended to be used when lower power consumption is needed
            while there is enough place in IRAM to place source code.

endmenu # "Power Management"