rt-thread/components/drivers/mfd/Kconfig

menuconfig RT_USING_MFD
    bool "Using Multifunction device drivers (MFD)"
    depends on RT_USING_DM
    default n
    help
      Enable the MFD framework so composite chips (PMICs, southbridges, etc.)
      described in device tree can expose multiple child devices (GPIO, RTC,
      regulator…) through the driver model. Required when your board uses such
      multifunction ICs; disable to save code if every device is standalone.

config RT_MFD_EDU
    bool "Educational device driver"
    depends on RT_USING_MFD
    depends on RT_USING_PCI
    depends on RT_USING_DMA
    default n

config RT_MFD_SYSCON
    bool "System Controller Register R/W"
    depends on RT_USING_MFD
    depends on RT_USING_OFW
    default y
    help
      Provide the syscon helper that maps register banks described by
      `syscon`/`simple-mfd` nodes and allows other drivers to read/write them.
      Keep enabled on SoCs whose reset/clock/PHY drivers access syscon regions.

if RT_USING_MFD
    osource "$(SOC_DM_MFD_DIR)/Kconfig"
endif