add_subdirectory(atmel) add_subdirectory(cmsis) add_subdirectory(cypress) add_subdirectory_if_kconfig(libmetal) add_subdirectory(nordic) add_subdirectory(nxp) add_subdirectory_if_kconfig(qmsi) add_subdirectory(st) add_subdirectory(ti) add_subdirectory(silabs) add_subdirectory(esp) add_subdirectory_ifdef(CONFIG_HAS_ALTERA_HAL altera)