menuconfig W1 bool "Dallas's 1-wire support" help Dallas' 1-wire bus is useful to connect slow 1-pin devices such as iButtons and thermal sensors. If you want W1 support, you should say Y here. if W1 source "drivers/w1/masters/Kconfig" source "drivers/w1/slaves/Kconfig" config W1_DUAL_SEARCH bool "dual search" help Some device need to be searched twice to be detected endif # W1