linux/drivers/misc/mchp_pci1xxxx/Kconfig

config GP_PCI1XXXX
       tristate "Microchip PCI1XXXX PCIe to GPIO Expander + OTP/EEPROM manager"
       depends on PCI
       depends on GPIOLIB
       depends on NVMEM_SYSFS
       select GPIOLIB_IRQCHIP
       select AUXILIARY_BUS
       help
         PCI1XXXX is a PCIe GEN 3 switch with one of the endpoints having
         multiple functions and one of the functions is a GPIO controller
         which also has registers to interface with the OTP and EEPROM.
         Select yes, no or module here to include or exclude the driver
         for the GPIO function.