esp-idf/components/esp_hw_support/Kconfig

menu "Hardware Settings"
    orsource "./port/$IDF_TARGET/Kconfig.spiram"

    menu "MAC Config"
        config ESP_MAC_ADDR_UNIVERSE_WIFI_STA
            bool

        config ESP_MAC_ADDR_UNIVERSE_WIFI_AP
            bool

        config ESP_MAC_ADDR_UNIVERSE_BT
            bool

        config ESP_MAC_ADDR_UNIVERSE_ETH
            bool

            # Insert chip-specific MAC config
        rsource "./port/$IDF_TARGET/Kconfig.mac"
    endmenu

    menu "Sleep Config"
        # This is here since this option affect behavior of esp_light_sleep_start
        # regardless of power management configuration.
        config ESP_SLEEP_POWER_DOWN_FLASH
            bool "Power down flash in light sleep when there is no SPIRAM"
            depends on !SPIRAM
            default n
            help
                If enabled, chip will try to power down flash as part of esp_light_sleep_start(), which costs
                more time when chip wakes up. Can only be enabled if there is no SPIRAM configured.

                This option will power down flash under a strict but relatively safe condition. Also, it is possible to
                power down flash under a relaxed condition by using esp_sleep_pd_config() to set ESP_PD_DOMAIN_VDDSDIO
                to ESP_PD_OPTION_OFF. It should be noted that there is a risk in powering down flash, you can refer
                `ESP-IDF Programming Guide/API Reference/System API/Sleep Modes/Power-down of Flash` for more details.

        config ESP_SLEEP_RTC_BUS_ISO_WORKAROUND
            bool
            default y if IDF_TARGET_ESP32 || IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32S3

        config ESP_SLEEP_GPIO_RESET_WORKAROUND
            bool "light sleep GPIO reset workaround"
            default y if IDF_TARGET_ESP32C2 || IDF_TARGET_ESP32C3 || IDF_TARGET_ESP32S3
            select PM_SLP_DISABLE_GPIO if FREERTOS_USE_TICKLESS_IDLE
            help
                esp32c2, esp32c3 and esp32s3 will reset at wake-up if GPIO is received a small electrostatic
                pulse during light sleep, with specific condition

                - GPIO needs to be configured as input-mode only
                - The pin receives a small electrostatic pulse, and reset occurs when the pulse
                  voltage is higher than 6 V

                For GPIO set to input mode only, it is not a good practice to leave it open/floating,
                The hardware design needs to controlled it with determined supply or ground voltage
                is necessary.

                This option provides a software workaround for this issue. Configure to isolate all
                GPIO pins in sleep state.

        config ESP_SLEEP_PSRAM_LEAKAGE_WORKAROUND
            bool "PSRAM leakage current workaround in light sleep"
            depends on SPIRAM
            default y
            help
                When the CS pin of SPIRAM is not pulled up, the sleep current will
                increase during light sleep. If the CS pin of SPIRAM has an external
                pull-up, you do not need to select this option, otherwise, you
                should enable this option.

        config ESP_SLEEP_FLASH_LEAKAGE_WORKAROUND
            bool "Flash leakage current workaround in light sleep"
            default y
            help
                When the CS pin of Flash is not pulled up, the sleep current will
                increase during light sleep. If the CS pin of Flash has an external
                pull-up, you do not need to select this option, otherwise, you
                should enable this option.

        config ESP_SLEEP_MSPI_NEED_ALL_IO_PU
            bool "All pins of mspi need pull up"
            depends on ESP_SLEEP_PSRAM_LEAKAGE_WORKAROUND || ESP_SLEEP_FLASH_LEAKAGE_WORKAROUND
            default y if IDF_TARGET_ESP32C2 || IDF_TARGET_ESP32S3
            help
                To reduce leakage current, some types of SPI Flash/RAM only need to pull up the CS pin
                during light sleep. But there are also some kinds of SPI Flash/RAM that need to pull up
                all pins. It depends on the SPI Flash/RAM chip used.

        config ESP_SLEEP_DEEP_SLEEP_WAKEUP_DELAY
            int "Extra delay in deep sleep wake stub (in us)"
            depends on IDF_TARGET_ESP32 || IDF_TARGET_ESP32S3
            default 2000
            range 0 5000
            help
                When the chip exits deep sleep, the CPU and the flash chip are powered on
                at the same time. CPU will run deep sleep stub first, and then
                proceed to load code from flash. Some flash chips need sufficient
                time to pass between power on and first read operation. By default,
                without any extra delay, this time is approximately 900us, although
                some flash chip types need more than that.

                By default extra delay is set to 2000us. When optimizing startup time
                for applications which require it, this value may be reduced.

                If you are seeing "flash read err, 1000" message printed to the
                console after deep sleep reset, try increasing this value.
    endmenu

    menu "RTC Clock Config"
        orsource "./port/$IDF_TARGET/Kconfig.rtc"

        config RTC_CLOCK_BBPLL_POWER_ON_WITH_USB
            # This is used for configure the RTC clock.
            bool "Keep BBPLL clock always work"
            depends on ESP_CONSOLE_USB_SERIAL_JTAG || ESP_CONSOLE_SECONDARY_USB_SERIAL_JTAG
            default y
            help
                When the chip goes sleep or software reset, the clock source would change to XTAL
                and switch off the BBPLL clock for saving power. However, this might make the
                USB_SERIAL_JTAG down which depends on BBPLL as its unique clock source.
                Therefore, this is used for keeping bbpll clock always on when USB_SERIAL_JTAG PORT is using.
                If you want to use USB_SERIAL_JTAG under sw_reset case or sleep-wakeup case, you shoule select
                this option. But be aware that this might increase the power consumption.
    endmenu

    menu "Peripheral Control"
        config PERIPH_CTRL_FUNC_IN_IRAM
            bool "Place peripheral control functions into IRAM"
            default n
            help
                Place peripheral control functions (e.g. periph_module_reset) into IRAM,
                so that these functions can be IRAM-safe and able to be called in the other IRAM interrupt context.
    endmenu

    menu "MMU Config"
        # This Config is used for configure the MMU.
        # Be configured based on flash size selection.
        # Invisible to users.

        config MMU_PAGE_SIZE_16KB
            bool
            default y if IDF_TARGET_ESP32C2 && ESPTOOLPY_FLASHSIZE_1MB
            default n

        config MMU_PAGE_SIZE_32KB
            bool
            default y if IDF_TARGET_ESP32C2 && ESPTOOLPY_FLASHSIZE_2MB
            default n

        config MMU_PAGE_SIZE_64KB
            bool
            default y if !MMU_PAGE_SIZE_32KB && !MMU_PAGE_SIZE_16KB
            default n

        config MMU_PAGE_MODE
            string
            default "16KB" if MMU_PAGE_SIZE_16KB
            default "32KB" if MMU_PAGE_SIZE_32KB
            default "64KB" if MMU_PAGE_SIZE_64KB

        config MMU_PAGE_SIZE
            # Some chips support different flash MMU page sizes: 64k, 32k, 16k.
            # Since the number of MMU pages is limited, the maximum flash size supported
            # for each page size is reduced proportionally: 4 MB, 2MB, 1MB. To make best
            # use of small flash sizes (reducing the wasted space due to alignment), we
            # need to use the smallest possible MMU page size for the given flash size.
            hex
            default 0x4000 if MMU_PAGE_SIZE_16KB
            default 0x8000 if MMU_PAGE_SIZE_32KB
            default 0x10000 if MMU_PAGE_SIZE_64KB
    endmenu

    # Insert chip-specific HW config
    orsource "./port/$IDF_TARGET/Kconfig.hw_support"

    menu "GDMA Configuration"
        depends on SOC_GDMA_SUPPORTED
        config GDMA_CTRL_FUNC_IN_IRAM
            bool "Place GDMA control functions into IRAM"
            default n
            help
                Place GDMA control functions (like start/stop/append/reset) into IRAM,
                so that these functions can be IRAM-safe and able to be called in the other IRAM interrupt context.
                Enabling this option can improve driver performance as well.

        config GDMA_ISR_IRAM_SAFE
            bool "GDMA ISR IRAM-Safe"
            default n
            help
                This will ensure the GDMA interrupt handler is IRAM-Safe, allow to avoid flash
                cache misses, and also be able to run whilst the cache is disabled.
                (e.g. SPI Flash write).
    endmenu # GDMA Configuration

    menu "Main XTAL Config"
        choice XTAL_FREQ_SEL
            prompt "Main XTAL frequency"
            default XTAL_FREQ_40 if SOC_XTAL_SUPPORT_40M
            help
                This option selects the operating frequency of the XTAL (crystal) clock used to drive the ESP target.
                The selected value MUST reflect the frequency of the given hardware.

                Note: The XTAL_FREQ_AUTO option allows the ESP target to automatically estimating XTAL clock's
                operating frequency. However, this feature is only supported on the ESP32. The ESP32 uses the
                internal 8MHZ as a reference when estimating. Due to the internal oscillator's frequency being
                temperature dependent, usage of the XTAL_FREQ_AUTO is not recommended in applications that operate
                in high ambient temperatures or use high-temperature qualified chips and modules.

            config XTAL_FREQ_24
                depends on SOC_XTAL_SUPPORT_24M
                bool "24 MHz"
            config XTAL_FREQ_26
                depends on SOC_XTAL_SUPPORT_26M
                bool "26 MHz"
            config XTAL_FREQ_32
                depends on SOC_XTAL_SUPPORT_32M
                bool "32 MHz"
            config XTAL_FREQ_40
                depends on SOC_XTAL_SUPPORT_40M
                bool "40 MHz"
            config XTAL_FREQ_AUTO
                depends on SOC_XTAL_SUPPORT_AUTO_DETECT
                bool "Autodetect"
        endchoice

        # rtc_xtal_freq_t enum in soc/rtc.h lists the XTAL frequencies can be supported
        # SOC_XTAL_SUPPORT_XXX in soc_caps.h lists the XTAL frequencies already supported
        config XTAL_FREQ
            int
            default 24 if XTAL_FREQ_24
            default 26 if XTAL_FREQ_26
            default 32 if XTAL_FREQ_32
            default 40 if XTAL_FREQ_40
            default 0  if XTAL_FREQ_AUTO
    endmenu
endmenu