1config RT_USING_DM 2 bool "Enable device driver model with device tree" 3 default n 4 help 5 Enable device driver model with device tree (FDT). It will use more memory 6 to parse and support device tree feature. 7 8config RT_USING_DEV_BUS 9 bool "Using Device Bus device drivers" 10 default y if RT_USING_SMART 11 default n 12